Powered by Deep Web Technologies
Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


1

Flat-Plate Photovoltaic Module Basics  

Broader source: Energy.gov [DOE]

Flat-plate photovoltaic (PV) modules are made of several components, including the front surface materials, encapsulant, rear surface, and frame.

2

THERMOSIPHON WATER HEATERS WITH HEAT EXCHANGERS  

E-Print Network [OSTI]

The Performance of Solar Water Heater With Natural Ci rcul2-6, 1980 THERMOSIPHON WATER HEATERS WITH HEAT EXCHANGERSJune 1980 THERMOSIPHON WATER HEATERS WITH HEAT EXCHANGERS*

Mertol, Atila

2012-01-01T23:59:59.000Z

3

Film cooling on a flat plate: investigating density  

E-Print Network [OSTI]

This study is an investigation of two specific effects on turbine blade film cooling. The effect of coolant to mainstream density ratio and upstream steps was studied. The studies were conducted on two flat plates with 4mm cylindrical film cooling...

Grizzle, Joshua Peter Fletcher

2009-05-15T23:59:59.000Z

4

Wave interaction with a fixed vertical flat plate  

E-Print Network [OSTI]

. Hydrofoil definition sketch. The sharp-edged gust problem and the problem of a step-wise cnange in the velocity perpendicular to the foil offers insight into the response of a foil subject to an oscillating fluid. A sharp-edged gust with an initial... forces on a thin flat plate with a standard hydrofoil thickness was determined experimentally in a two-dimensional wave tank. Non-dimensional parameters were plotted and used to evaluate the data. It was shown that lift can be generated on a flat...

Glover, Lanny Bruce

1985-01-01T23:59:59.000Z

5

Evaluation of tracking flat plate and concentrator PV systems  

SciTech Connect (OSTI)

Arizona Public Service Company has conducted side-by-side field tests of most of the leading tracking flat plate and concentrating PV technologies. The results verify the added value due to tracking, but show that additional reliability improvements are needed in most cases. Concentrator PV systems can be high performers in sunny regions. In addition, a novel inverter system design by Raytheon has demonstrated excellent performance and promises to be more reliable and have lower cost than competing technologies.

Lepley, T. [Phasor Energy Co., Phoenix, AZ (United States); Hammond, B.; Harris, A. [Arizona State Univ., Tempe, AZ (United States)

1997-12-31T23:59:59.000Z

6

Distributed Roughness Receptivity in a Flat Plate Boundary Layer  

E-Print Network [OSTI]

- Distributed Receptivity . . . . . 6 2. FACILITY DESCRIPTION - THE KLEBANOFF–SARIC WIND TUNNEL 11 2.1 Test Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.2 Fan and Motor... of this dissertation describes the Klebanoff–Saric Wind Tunnel facility, which was used for this experiment. Section 3 describes the experimental setup (roughness design and the flat plate model) and defines the metrics by which the flow field is decomposed...

Kuester, Matthew Scott

2014-04-18T23:59:59.000Z

7

System Advisor Model: Flat Plate Photovoltaic Performance Modeling Validation Report  

SciTech Connect (OSTI)

The System Advisor Model (SAM) is a free software tool that performs detailed analysis of both system performance and system financing for a variety of renewable energy technologies. This report provides detailed validation of the SAM flat plate photovoltaic performance model by comparing SAM-modeled PV system generation data to actual measured production data for nine PV systems ranging from 75 kW to greater than 25 MW in size. The results show strong agreement between SAM predictions and field data, with annualized prediction error below 3% for all fixed tilt cases and below 8% for all one axis tracked cases. The analysis concludes that snow cover and system outages are the primary sources of disagreement, and other deviations resulting from seasonal biases in the irradiation models and one axis tracking issues are discussed in detail.

Freeman, J.; Whitmore, J.; Kaffine, L.; Blair, N.; Dobos, A. P.

2013-12-01T23:59:59.000Z

8

FLAT PLATE HEAT PIPES: FROM OBSERVATIONS TO THE MODELING OF THE CAPILLARY STUCTURE  

E-Print Network [OSTI]

1 FLAT PLATE HEAT PIPES: FROM OBSERVATIONS TO THE MODELING OF THE CAPILLARY STUCTURE Frédéric ABSTRACT This paper presents a synthesis of observations made inside six different flat plate heat pipes to estimate the performance of the heat pipe in a real application with several electronic components

Paris-Sud XI, Université de

9

An experimental investigation of certain flat plates loaded in torsion with end restraint  

E-Print Network [OSTI]

and deflections of flat plates loaded in torsion are oonsidered. Plates of width-Chiohess ratios of 8, 10, 12 and 14 and length- width ratios of 1, 2 ~ 4 and 6 are used Theoretical and expsrinental stress and defleotion ourves are plottedi Sartloular... require high struotural solidities. Ls a result a flat plate nay be used to sienlate wing struotural problens ~ 1 Theoretioal solutions ~ ~ for the stresses and defleotions of flat plates with torsional loads ellninate the effeots of end restraint by as...

Hamner, Bennett Barron

1953-01-01T23:59:59.000Z

10

Experimental Investigations of Vortex Induced Vibration of A Flat Plate in Pitch Oscillation  

E-Print Network [OSTI]

A bluff structure placed in a flowing fluid, may be subjected to vortex-induced vibrations (VIV). For a flat plate with only rotational degree of freedom, the VIV is rotational oscillation. Based on the experimental investigation, vortex...

Yang, Yi

2012-02-14T23:59:59.000Z

11

Design of Flat-Plate Dehumidifiers for Humidification–Dehumidification Desalination Systems  

E-Print Network [OSTI]

Flat-plate heat exchangers are examined for use as dehumidifiers in humidification–dehumidification (HDH) desalination systems. The temperature and humidity ratio differences that drive mass transfer are considerably higher ...

Sievers, Martin

12

Heat Transfer -2 A heat generating ( ) flat plate fuel element of thickness 2L is covered with flat plate steel cladding of  

E-Print Network [OSTI]

with flat plate steel cladding of thickness b. The heat generated is removed by a fluid at T, which adjoins on both sides On the sketch show regions where dT/dx is zero, constant and increasing. T , h x LL bb SteelSteel

Virginia Tech

13

Friction factor data for flat plate tests of smooth and honeycomb surfaces  

E-Print Network [OSTI]

are needed. The purpose of this report is to present the air flow friction factor data for honeycomb surfaces (i.e., 1.57 mm, 0.79 mm and 0.51 mm in cell width, 3.81 mm and 2.29 mm in cell depth) with a flat plate tester. The flat plate tester is designed....2bar, and 17.9bar, respectively and 3 clearances between honeycombs which are 0.25mm, 0.38mm and 0.51mm. These clearance values are representative of actual seals used in the turbomachinary. The following questions wil l be answered: 1) Does...

Ha, Tae Woong

1989-01-01T23:59:59.000Z

14

Dynamic pressure response of water flow between closely spaced roughened flat plates  

E-Print Network [OSTI]

of MASTER OF SCIENCE May 1993 Major Subject: Mechanical Engineering DYNAMIC PRESSURE RESPONSE OF WATER FLOW BETWEEN CLOSELY SPACED ROUGHENED FLAT PLATES A Thesis by JOHN CHARLES HESS Approved as to style and content by: Robert E. DeOtte, Jr. (Co.... S. , Texas A&M University Co-Chairs of Advisory Committee: Dr. R. E. DeOtte, Jr, Dr. G, L, Morrison A flat plate tester was designed and built to determine friction factors and dynamic pressures for water flow over smooth, knurl, and cavity...

Hess, John Charles

2012-06-07T23:59:59.000Z

15

A SOLAR STILL AUGMENTED WITH A FLAT-PLATE COLLECTOR AND A REFLECTOR  

E-Print Network [OSTI]

A SOLAR STILL AUGMENTED WITH A FLAT-PLATE COLLECTOR AND A REFLECTOR A. Saleh A. Badran Mechanical ­ Jordan Amman ­ Jordan e-mail: asaleh@philadelphia.edu.jo e-mail: badran@ju.edu.jo ABSTRACT A solar distillation system was built and tested to study the effect of increasing the solar radiation incident

16

Heat Transfer -1 A satellite in space orbits the sun. The satellite can be approximated as a flat plate with  

E-Print Network [OSTI]

Heat Transfer - 1 A satellite in space orbits the sun. The satellite can be approximated as a flat plate with dimensions and properties given below. (a) Calculate the solar heat flux (W/m2 is at a distance where the solar heat flux (as defined above) is 500 W/m2 , and the flat plate is oriented

Virginia Tech

17

Proceedings of the flat-plate solar array project research forum on photovoltaic metallization systems  

SciTech Connect (OSTI)

A Photovoltaic Metallization Research Forum, under the sponsorship of the Jet Propulsion Laboratory's Flat-Plate Solar Array Project and the US Department of Energy, was held March 16-18, 1983 at Pine Mountain, Georgia. The Forum consisted of five sessions, covering (1) the current status of metallization systems, (2) system design, (3) thick-film metallization, (4) advanced techniques and (5) future metallization challenges. Twenty-three papers were presented.

None

1983-11-15T23:59:59.000Z

18

The distortion of a uniform flow field due to a finite flat plate  

E-Print Network [OSTI]

Advantages of the Application of the Complete Navier-Stokes Equations Synopsis II ANALYSIS The Physical Model The Mathematical Model Governing Differential Fquations Initial and Boundary Conditions 10 III METHOD OF SOLUTION 19 General Method... INTRODUCTION Pur ose and Sco e The purpose of this study is to apply numerical methods to solve the exact partial differential equations governing viscous fluid flow past a finite flat plate. The flow condition studied is that of time-dependent, two...

Zull, Lawrence Michael

1970-01-01T23:59:59.000Z

19

Review of solar thermoelectric energy conversion and analysis of a two cover flat-plate solar collector  

E-Print Network [OSTI]

The process of solar thermoelectric energy conversion was explored through a review of thermoelectric energy generation and solar collectors. Existing forms of flat plate collectors and solar concentrators were surveyed. ...

Hasan, Atiya

2007-01-01T23:59:59.000Z

20

Preliminary Measurements From A New Flat Plate Facility For Aerodynamic Research  

SciTech Connect (OSTI)

This paper details the design and preliminary measurements used in the characterisation of a new flat plate research facility. The facility is designed specifically to aid in the understanding of entropy generation throughout the boundary layer with special attention given to non-equilibrium flows. Hot-wire measurements were obtained downstream of two turbulence generating grids. The turbulence intensity, integral and dissipation length scale ranges measured are 1.6%-7%, 5mm-17mm and 0.7mm-7mm, respectively. These values compared well to existing correlations. The flow downstream of both grids was found to be homogenous and isotropic. Flow visualisation is employed to determine aerodynamic parameters such as flow 2-dimensionality and the effect of the flap angle on preventing separation at the leading edge. The flow was found to be 2-dimensional over all measurement planes. The non-dimensional pressure distribution of a modern turbine blade suction surface is simulated on the flat plate through the use of a variable upper wall. The Reynolds number range based on wetted plate length and inlet velocity is 70,000-4,000,000.

D. M. McEligot; D. W. Nigg; E. J. Walsh; D. Hernon; M.R.D. Davies

2005-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


21

Measurements of Conversion Efficiency for a Flat Plate Thermophotovoltaic System Using a Photonic Cavity Test System  

SciTech Connect (OSTI)

The performance of a 1 cm{sup 2} thermophotovoltaic (TPV) module was recently measured in a photonic cavity test system. A conversion efficiency of 11.7% was measured at a radiator temperature of 1076 C and a module temperature of 29.9 C. This experiment achieved the highest direct measurement of efficiency for an integrated TPV system. Efficiency was calculated from the ratio of the peak (load matched) electrical power output and the heat absorption rate. Measurements of these two parameters were made simultaneously to assure the validity of the measured efficiency value. This test was conducted in a photonic cavity which mimicked a typical flat-plate TPV system. The radiator was a large, flat graphite surface. The module was affixed to the top of a copper pedestal for heat absorption measurements. The heat absorption rate was proportional to the axial temperature gradient in the pedestal under steady-state conditions. The test was run in a vacuum to eliminate conductive and convective heat transfer mechanisms. The photonic cavity provides the optimal test environment for TPV efficiency measurements because it incorporates all important physical phenomena found in an integrated TPV system: high radiator emissivity and blackbody spectral shape, photon recycling, Lambertian distribution of incident radiation and complex geometric effects. Furthermore, the large aspect ratio between radiating surface area and radiator/module spacing produces a view factor approaching unity with minimal photon leakage.

E.J. Brown; C.T. Ballinger; S.R. Burger; G.W. Charache; L.R. Danielson; D.M. DePoy; T.J. Donovan; M. LoCascio

2000-05-30T23:59:59.000Z

22

EVALUATION OF FLAT-PLATE PHOTOVOLTAIC THERMAL HYBRID SYSTEMS FOR SOLAR ENERGY UTILIZATION.  

SciTech Connect (OSTI)

The technical and economic attractiveness of combined photovoltaic/thermal (PV/T) solar energy collectors was evaluated. The study was limited to flat-plate collectors since concentrating photovoltaic collectors require active cooling and thus are inherently PV/T collectors, the only decision being whether to use the thermal energy or to dump it. it was also specified at the outset that reduction in required roof area was not to be used as an argument for combining the collection of thermal and electrical energy into one module. Three tests of economic viability were identified, all of which PV/T must pass if it is to be considered a promising alternative: PV/T must prove to be competitive with photovoltaic-only, thermal-only, and side-by-side photovoltaic-plus-thermal collectors and systems. These three tests were applied to systems using low-temperature (unglazed) collectors and to systems using medium-temperature (glazed) collectors in Los Angeles, New York, and Tampa. For photovoltaics, the 1986 DOE cost goals were assumed to have been realized, and for thermal energy collection two technologies were considered: a current technology based on metal and glass, and a future technology based on thin-film plastics. The study showed that for medium-temperature applications PV/T is not an attractive option in any of the locations studied. For low-temperature applications, PV/T appears to be marginally attractive.

ANDREWS,J.W.

1981-06-01T23:59:59.000Z

23

Modal parameters for a flat plate supported by an oil film.  

SciTech Connect (OSTI)

This paper examines the resonant frequencies, Mode shapes, and damping values for a square plate suppcirted by an oil film. Such a study is motivated by interesl: in oil-supported slip tables used for vibration testing. Rtssonant frequencies and percent critical damping were measured for four cases: plate freely suspended; plate with free end conditions and suppoited by an oil film; plate fixed at several locations; and plate fixed at several locations while supported by an oil film. Analytical estimates of the modal properties and modal propertie!j derived from measured data are compared and discrepancies discussed.

Jauhola, A. G. (Andrew G.); Kinzel, E. C. (Edward C.); Reding, D. (Derek); Hunter, N. F. (Norman F.)

2003-01-01T23:59:59.000Z

24

A photoelastic stress analysis of a flat circular plate simply supported and subjected to a concentrated load at the center  

E-Print Network [OSTI]

LIBRARy 4 4 III coI I BGv IIf Tf4 A PHOTOELASTIC STRESS ANALYSIS OF A FLAT CIRCULAR PLATE SIWPLY SUPPORTED AND SUBJECTED TO A CONCENTRATED LOAD AT THE CENTERS A Thesis By Joseph Lloyd Fulbright Submitted to the Graduate School... AND SUBJECTED TO A CONCENTRATED LOAD AT THE CENTER, A Thesis By Joseph Lloyd Fulbright Approved as to Style and Content by& Chairman of Committee Head of Department May 1/58 ACKNOWLEDGEMENT The technical assistance and advice of Professor B. E...

Fulbright, Joseph Lloyd

1958-01-01T23:59:59.000Z

25

Optimal arrangement of structural and functional parts in a flat plate integrated collector storage solar water heater (ICSSWH)  

SciTech Connect (OSTI)

Parameters that affect the efficiency of a flat plate integrated collector storage solar water heater (ICSSWH) are examined experimentally and numerically. This specific ICSSWH contains water that is not refreshed. The service water is heated indirectly through an immersed heat exchanger (HE) in contact with the front and back major surfaces. A forced convection mechanism consisting of a pump that brings the storage water into motion by recirculation is used for heat transfer intensification. The two major (front and back) flat plate surfaces need to be well interconnected so that they are not deformed by the weight of the contained water and the exerted high-pressure. Two main factors that influence the performance are optimized: the position and size of the recirculation ports and the arrangement and size of the interconnecting fins. Both factors are explored to maximize the velocity flow field of the recirculated storage water. Consequently, the heat transfer rate between the two water circuits is maintained at high levels. Various 3D computational fluid dynamics (CFD) models are developed using the FLUENT package. An experimental model, made by Plexiglas, is used for the visualization of the flow field. Flow velocities are measured using a laser doppler velocimetry (LDV) system. The optimal arrangement increases the mean storage water velocity by 65% and raises the outlet temperatures up to 8 C. (author)

Gertzos, K.P.; Caouris, Y.G. [Department of Mechanical Engineering and Aeronautics, University of Patras, 265 00 Patras (Greece)

2008-04-15T23:59:59.000Z

26

An evaluation of the thermal characteristics of a flat plate heat pipe spreader  

E-Print Network [OSTI]

loss could bc determined. Duc to the axisymmetric nature of the i. echnique, it was necessary to define the effective radial heat pipe dimensions. ln the case of a disk shaped flat heat pipe, the effective radius is equal to the radius of the disk...

Chesser, Jason Blake

2000-01-01T23:59:59.000Z

27

Effects of the foil flatness on the stress-strain characteristics of U10Mo alloy based monolithic mini-plates  

SciTech Connect (OSTI)

The effects of the foil flatness on stress-strain behavior of monolithic fuel mini-plates during fabrication and irradiation were studied. Monolithic plate-type fuels are a new fuel form being developed for research and test reactors to achieve higher uranium densities. This concept facilitates the use of low-enriched uranium fuel in the reactor. These fuel elements are comprised of a high density, low enrichment, U–Mo alloy based fuel foil encapsulated in a cladding material made of Aluminum. To evaluate the effects of the foil flatness on the stress-strain behavior of the plates during fabrication, irradiation and shutdown stages, a representative plate from RERTR-12 experiments (Plate L1P756) was considered. Both fabrication and irradiation processes of the plate were simulated by using actual irradiation parameters. The simulations were repeated for various foil curvatures to observe the effects of the foil flatness on the peak stress and strain magnitudes of the fuel elements. Results of fabrication simulations revealed that the flatness of the foil does not have a considerable impact on the post fabrication stress-strain fields. Furthermore, the irradiation simulations indicated that any post-fabrication stresses in the foil would be relieved relatively fast in the reactor. While, the perfectly flat foil provided the slightly better mechanical performance, overall difference between the flat-foil case and curved-foil case was not significant. Even though the peak stresses are less affected, the foil curvature has several implications on the strain magnitudes in the cladding. It was observed that with an increasing foil curvature, there is a slight increase in the cladding strains.

Hakan Ozaltun; Pavel Medvedev

2014-11-01T23:59:59.000Z

28

Design of a photovoltaic central power station: flat-plate array  

SciTech Connect (OSTI)

A design for a photovoltaic central power station using fixed flat-panel arrays has been developed. The 100 MW plant is assumed to be located adjacent to the Saguaro Power Station of Arizona Public Service. The design assumes high-efficiency photovoltaic modules using dendritic web cells. The modules are arranged in 5 MW subfields, each with its own power conditioning unit. The photovoltaic output is connected to the existing 115 kV utility switchyard. The site specific design allows detailed cost estimates for engineering, site preparation, and installation. Collector and power conditioning costs have been treated parametrically.

Not Available

1984-02-01T23:59:59.000Z

29

40th Fluid Dynamics Conference and Exhibit, 28 Jun -1 Jul 2010, Chicago, Illinois Transition of hypersonic flow past flat plate with  

E-Print Network [OSTI]

of hypersonic flow past flat plate with roughness elements Prahladh S Iyer , Suman Muppidi and Krishnan Mahesh and Astronautics #12;I. Introduction Studying laminar-turbulent transition in supersonic and hypersonic boundary-turbulent transition.2 Schneider3 gives a comprehensive review of the effects of roughness on hypersonic boundary layer

Mahesh, Krishnan

30

Self-Sustaining Process through Streak Generation in a Flat-Plate Boundary Layer Thomas Duriez, Jean-Luc Aider, and Jose Eduardo Wesfreid  

E-Print Network [OSTI]

Self-Sustaining Process through Streak Generation in a Flat-Plate Boundary Layer Thomas Duriez July 2009; published 28 September 2009) The existence of a self-sustaining process between streamwise-bounded turbulence. The existence of a self- sustaining process (SSP) between these two flow structures has been

Wesfreid, José Eduardo

31

Thermosiphon Cooling of a Large Office /Laboratory Complex  

E-Print Network [OSTI]

will be 716 ESL-IE-81-04-122 Proceedings from the Third Industrial Energy Technology Conference Houston, TX, April 26-29, 1981 produced with cold cooling tower water. Refrigerant vapor (R-12) is condensed with cooling tower water between 35 and 50?F... the Third Industrial Energy Technology Conference Houston, TX, April 26-29, 1981 ,.---Condenser Cooling Water Chilled Water --------------- -- 48/4S"F R-12 Refrigerant Compressor ----- 40/42'F Chilled Water Evaporator " FIGURE NO.6 - THERMOSIPHON...

White, T. L.

1981-01-01T23:59:59.000Z

32

An experimental investigation of the rolling moment on a flat plate in the presence of a free vortex of known strength  

E-Print Network [OSTI]

AN EXPERIMENTAL 1NVES1'IGATION OF THE ROLLING MOMENT ON A ILAT PLATE IN THE ?RESENCE OP A FREE VORTEX OF KNOWN STRENGTH A Thesis by MAURICE VERNE VAN DUSEN, JR. Submitted to the Graduate College of Teras A&M University in partial fulfillment... of the requirement for the degree of MASTER OF SCIENCE May 1970 Major Subject: Aerospace Engineering EXPERIMENTAL INVESTIGATION OF THE ROLLING MOMENT ON A FLAT PLATE IN THE PRESENCE OF A FREE VORTEX OF KNONN STRENGTH A Thesis by MAURICE VERNE VAN DUSEN, JR...

Van Dusen, Maurice Verne

2012-06-07T23:59:59.000Z

33

The effect of tangential mass addition on the boundary layer velocity distribution of a flat plate at zero angle of attack  

E-Print Network [OSTI]

. V . RESULTS AND DISCUSSION 16 18 20 21 24 Boundary Layer Conditions Downstream of Blowing Slot . Boundary Layer Conditions Upstream of Slot Accuracy of Data 24 40 47 VI. CONCLUSIONS AND RECOMMENDATIONS ~ 51 LITERATURE CITED 54 APPENDIX... 55 Estimation of Error Caused by Leaks in the Pressure Measuring System 56 LIST OF FIGURES Figure Page 3" x 48" Smoke Tunnel 2. Flat Plate Model 3. Schematic of Pressure System 4. Volume Flow Rates of Working Pipe Tap Orifice 14 Variation...

Miller, Edward Peter

2012-06-07T23:59:59.000Z

34

DESIGN AND FABRICATION OF A FLAT-PLATE MULTICHANNEL HE-COOLED REFRACTORY HX FOR DIVERTOR APPLICATIONS  

E-Print Network [OSTI]

) that employs open-cell refractory foam to enhance heat transfer from the heated plate to the helium coolant of research regarding refractory metal based helium- cooled divertors with enhanced heat transfer in plate these in that foam is used as a porous medium for heat transfer enhancement as detailed in previous publications5

Ghoniem, Nasr M.

35

Convective currents in nucleate pool boiling and their effects on the heat flux from varying diameter flat plate heating elements  

E-Print Network [OSTI]

investigation was conducred to amine the effects of convection currents in nucleate oool boil ing and to determine the changes in critical heat flux caused by varying the diameter of horizontal flat olate heating surfaces. Freon 113 (Trichlorotrifluoroethane... by high energy costs and thc need to economize in industrial heat transfer applications . I'nucleate boiling is a very efficient neans of heat transfer because of the large sur ace areas involved in vaporization of the bulk fluid. as bubbles form...

Morford, Peter Stephen

1980-01-01T23:59:59.000Z

36

A mathematical model for the performance of the compressed-film, floating-deck, flat-plate solar-energy collector  

E-Print Network [OSTI]

A MATHEMATICAL MODEL FOR THE PERFORMANCE OP THE COMFR. . 'SSED-FILM PLOATING-DECK, PLAT-PLATE SOLAR-ENERGY COLI CTOR A Thesis HO-KAI CHAN Submitted to the Graduate Co1lege of Texas A&M University in partial fulfillment of 0he requirement... for the degree of FiASTER OP SCIENCE August 197~ MaJor SubJect: Chemical Engineering A MATHEMATICAL MODEL FOR THE PERFORMANCE OF THE COMPRESSED-FILM, FLOATING-DECK~ PLAT-PLATE SOLAR-ENERGY COLLECTOR A Thesis by HO-KAI CHAN Approved as to style...

Chan, Ho-Kai

1975-01-01T23:59:59.000Z

37

The effect of injection hole orientation on flat-plate film cooling and heat transfer using a transient liquid crystal technique  

E-Print Network [OSTI]

-UP. . . . . EXPERIMENTAL PROCEDURE THEORY OF OPERATION. . . RESULTS AND DISCUSSION. . Heat transfer. . Local Spanwise Variations. . Effect of Density Ratio and Compound Angle. . . . Momentuin Flux Ratio. Film Effectiveness. . . . . . Local Spanwise Variations... cavity for mixing and ejecta through the holes onto the test plate. Temperature controllers for the mainstream and coolant flows allow for desired temperature levels to be reached and inaintained. The coolant temperature is monitored at an injection...

Zapata, Dyrk Oliver

2012-06-07T23:59:59.000Z

38

2011 Vibrations -1 VIBRATION OF PLATES & BARS  

E-Print Network [OSTI]

of plates of different shapes using Chladni patterns. APPARATUS: Function generator in FFTSCOPE, long and short flat bars, Chladni plates, salt, salt trays INTRODUCTION he equations of vibrational motion. The solutions become very complicated for the free boundary condition at the perimeter of the plate. The Chladni

Glashausser, Charles

39

Plates with incompatible prestrain  

E-Print Network [OSTI]

We study the effective elastic behavior of incompatibly prestrained plates, where the prestrain is independent of thickness as well as uniform through the thickness. We model such plates as three-dimensional elastic bodies with a prescribed pointwise stress-free state characterized by a Riemannian metric $G$ with the above properties, and seek the limiting behavior as the thickness goes to zero. Our results extand the prior analysis in M. Lewicka, M. R. Pakzad ESAIM Control Optim. Calc. Var. 17 (2011), no. 4. We first establish that the $\\Gamma$-limit is a Kirchhoff type bending. Further, we show that the minimum energy configuration contains non-trivial Kirchhoff type bending -- i.e., the scaling of the three-dimensional energy is of the order of the cube of the plate thickness -- if and only if the Riemann curvatures $R^3_{112}, R^3_{221}$ and $ R_{1212}$ of $G$ do not identically vanish. We demonstrate through examples, the existence of a new regime where the three above curvatures of $G$ vanish (while the mid-plane of the plate may or may not be flat), but the limiting configuration still has energy that is of the order of F\\"oppl - von K\\'arm\\'an plates. Finally, we apply these results to a model of nematic glass, including a characterization of the condition when the metric is immersible, for $G=\\mbox{Id}_3 +\\gamma\\vec n\\otimes \\vec n$ given in terms of the inhomogeneous unit director field distribution $\\vec n\\in\\mathbb{R}^3$.

Kaushik Bhattacharya; Marta Lewicka; Mathias Schäffner

2014-01-08T23:59:59.000Z

40

Electroless copper plating  

DOE Patents [OSTI]

An optimized electroless copper plating technique suitable for plating electroless copper upon ceramics.

McHenry, Michael R. (Lee's Summit, MO)

1998-12-15T23:59:59.000Z

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


41

Solar Radiation Data Manual for Flat-Plate and Concentrating...  

Office of Scientific and Technical Information (OSTI)

latitude, and latitude plus 15. These trackers pivot on their single axis to track the sun, facing east in the morning and west in the afternoon. Large collectors can use an axis...

42

Flat-Plate Photovoltaic System Basics | Department of Energy  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector General Office0-72.pdf Flash2010-72.pdf Flash2010-72.pdf MoreFlash_2010-49.pdfSystem Basics

43

Is flat fair?  

SciTech Connect (OSTI)

Dynamic pricing holds out the promise of shifting peak demand as well as reducing overall demand. But it also raises thorny issues of fairness. All practical pricing systems involve tradeoffs between equity and efficiency. I examine the circumstances under which equity ought to be allowed to trump efficiency and whether or not this constitutes a defense of flat pricing. (author)

Bunzl, Martin

2010-07-15T23:59:59.000Z

44

The Theoryof Maximally Flat  

E-Print Network [OSTI]

TRANSACTIONSON AUDIO AND ELECTROACOUSTICS, VOL. AU-20, NO. 3, AUGUST 1972 dynamic drag of the voice coil be made as flat as thedesigner'sconstraints permit. II. Theory Let the dc resistance of the voice coil, rl the mechanical re- sistance of the cone suspension, and SIthe suspension stiff- ness or spring

California at Berkeley, University of

45

Electroless copper plating  

DOE Patents [OSTI]

An optimized electroless copper plating technique is described suitable for plating electroless copper upon ceramics. 12 figs.

McHenry, M.R.

1998-12-15T23:59:59.000Z

46

Kentish Flats Offshore Wind Farm  

E-Print Network [OSTI]

Kentish Flats Offshore Wind Farm #12;By August 2005 the offshore wind farm at Kentish Flats plateau just outside the main Thames shipping lanes. The Kentish Flats wind farm will comprise 30 of the wind farm could be up to 90 MW. For the benefit of the environment The British Government has set

Firestone, Jeremy

47

Vacuum fusion bonding of glass plates  

DOE Patents [OSTI]

An improved apparatus and method for vacuum fusion bonding of large, patterned glass plates. One or both glass plates are patterned with etched features such as microstructure capillaries and a vacuum pumpout moat, with one plate having at least one hole therethrough for communication with a vacuum pumpout fixture. High accuracy alignment of the plates is accomplished by a temporary clamping fixture until the start of the fusion bonding heat cycle. A complete, void-free fusion bond of seamless, full-strength quality is obtained through the plates; because the glass is heated well into its softening point and because of a large, distributed force that is developed that presses the two plates together from the difference in pressure between the furnace ambient (high pressure) and the channeling and microstructures in the plates (low pressure) due to the vacuum drawn. The apparatus and method may be used to fabricate microcapillary arrays for chemical electrophoresis; for example, any apparatus using a network of microfluidic channels embedded between plates of glass or similar moderate melting point substrates with a gradual softening point curve, or for assembly of glass-based substrates onto larger substrates, such as in flat panel display systems.

Swierkowski, Steve P. (Livermore, CA); Davidson, James C. (Livermore, CA); Balch, Joseph W. (Livermore, CA)

2001-01-01T23:59:59.000Z

48

Vacuum fusion bonding of glass plates  

DOE Patents [OSTI]

An improved apparatus and method for vacuum fusion bonding of large, patterned glass plates. One or both glass plates are patterned with etched features such as microstructure capillaries and a vacuum pumpout moat, with one plate having at least one hole therethrough for communication with a vacuum pumpout fixture. High accuracy alignment of the plates is accomplished by a temporary clamping fixture until the start of the fusion bonding heat cycle. A complete, void-free fusion bond of seamless, full-strength quality is obtained through the plates; because the glass is heated well into its softening point and because of a large, distributed force that is developed that presses the two plates together from the difference in pressure between the furnace ambient (high pressure) and the channeling and microstructures in the plates (low pressure) due to the vacuum drawn. The apparatus and method may be used to fabricate microcapillary arrays for chemical electrophoresis; for example, any apparatus using a network of microfluidic channels embedded between plates of glass or similar moderate melting point substrates with a gradual softening point curve, or for assembly of glass-based substrates onto larger substrates, such as in flat panel display systems.

Swierkowski, Steve P. (Livermore, CA); Davidson, James C. (Livermore, CA); Balch, Joseph W. (Livermore, CA)

2000-01-01T23:59:59.000Z

49

A quasi-3D analysis of the thermal performance of a flat heat pipe G. Carbajal a,*, C.B. Sobhan b  

E-Print Network [OSTI]

A quasi-3D analysis of the thermal performance of a flat heat pipe G. Carbajal a,*, C.B. Sobhan b form 29 January 2007 Available online 8 May 2007 Abstract The thermal performance of a flat heat pipe. The transient temperature distribution on a solid aluminum plate was compared with the flat heat pipe results

Wadley, Haydn

50

Flat | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublicIDAPowerPlantSitingConstruction.pdfNotify98.pdf Jump to:Siting.pdfFiskdale,Five StarFlash Steam512357°,Flat

51

Absolute calibration of optical flats  

DOE Patents [OSTI]

The invention uses the phase shifting diffraction interferometer (PSDI) to provide a true point-by-point measurement of absolute flatness over the surface of optical flats. Beams exiting the fiber optics in a PSDI have perfect spherical wavefronts. The measurement beam is reflected from the optical flat and passed through an auxiliary optic to then be combined with the reference beam on a CCD. The combined beams include phase errors due to both the optic under test and the auxiliary optic. Standard phase extraction algorithms are used to calculate this combined phase error. The optical flat is then removed from the system and the measurement fiber is moved to recombine the two beams. The newly combined beams include only the phase errors due to the auxiliary optic. When the second phase measurement is subtracted from the first phase measurement, the absolute phase error of the optical flat is obtained.

Sommargren, Gary E.

2005-04-05T23:59:59.000Z

52

Original article Flat ceramic membranes  

E-Print Network [OSTI]

membranes. The orig- inal intellectual concept is protected by two international patents. Strategically of investment and functioning costs while keeping the interest of ceramics. ceramic membrane / plate / tubular

Paris-Sud XI, Université de

53

Earth's Decelerating Tectonic Plates  

SciTech Connect (OSTI)

Space geodetic and oceanic magnetic anomaly constraints on tectonic plate motions are employed to determine a new global map of present-day rates of change of plate velocities. This map shows that Earth's largest plate, the Pacific, is presently decelerating along with several other plates in the Pacific and Indo-Atlantic hemispheres. These plate decelerations contribute to an overall, globally averaged slowdown in tectonic plate speeds. The map of plate decelerations provides new and unique constraints on the dynamics of time-dependent convection in Earth's mantle. We employ a recently developed convection model constrained by seismic, geodynamic and mineral physics data to show that time-dependent changes in mantle buoyancy forces can explain the deceleration of the major plates in the Pacific and Indo-Atlantic hemispheres.

Forte, A M; Moucha, R; Rowley, D B; Quere, S; Mitrovica, J X; Simmons, N A; Grand, S P

2008-08-22T23:59:59.000Z

54

Half-flat Quantum Hair  

E-Print Network [OSTI]

By wrapping D3-branes over 3-cycles on a half-flat manifold we construct an effective supersymmetric black hole in the N=2 low-energy theory in four-dimensions. Specifically we find that the torsion cycles present in a half-flat compactification, corresponding to the mirror symmetric image of electric NS flux on a Calabi-Yau manifold, manifest in the half-flat black hole as quantum hair. We compute the electric and magnetic charges related to the quantum hair, and also the mass contribution to the effective black hole. We find that by wrapping a number of D3-branes equal to the order of the discrete group associated to the torsional part of the half-flat homology, the effective charge and mass terms vanishes. We compute the variation of entropy and the corresponding temperature associated with the lost of quantum hair. We also comment on the equivalence between canceling Freed-Witten anomaly and the assumption of self-duality for the 5-form field strength. Finally from a K-theoretical perspective, we compute the presence of discrete RR charge of D-branes wrapping torsional cycles in a half-flat manifold.

Hugo Garcia-Compean; Oscar Loaiza-Brito; Aldo Martinez-Merino; Roberto Santos-Silva

2013-10-27T23:59:59.000Z

55

Surface preparation and plating  

SciTech Connect (OSTI)

This chapter covers electroplating and electroless nickel plating since coatings of this type play an important role in diamond turning technology. Items to be discussed include preparation of substrates prior to coating, plating defects such as pits and nodules and their influence on optics, the influence of stress in coatings, plating details for copper, gold, silver, and electroless nickel, and the importance of additives and their influence on grain size and structure of deposits. Some comments are made on future challenges that could be presented to the plating community to further improve the quality of coatings applied for diamond turning purposes. 60 references, 8 figures, 9 tables.

Dini, J.W.; Waldrop, F.B.; Reno, R.W.

1982-10-06T23:59:59.000Z

56

Nitrided Metallic Bipolar Plates  

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

nitrided surface treatment. In this approach, an electrically-conductive and corrosion-resistant chromium-nitride surface layer is formed on the bipolar plate component by...

57

Vacuum fusion bonded glass plates having microstructures thereon  

DOE Patents [OSTI]

An improved apparatus and method for vacuum fusion bonding of large, patterned glass plates. One or both glass plates are patterned with etched features such as microstructure capillaries and a vacuum pumpout moat, with one plate having at least one hole therethrough for communication with a vacuum pumpout fixture. High accuracy alignment of the plates is accomplished by a temporary clamping fixture until the start of the fusion bonding heat cycle. A complete, void-free fusion bond of seamless, full-strength quality is obtained through the plates; because the glass is heated well into its softening point and because of a large, distributed force that is developed that presses the two plates together from the difference in pressure between the furnace ambient (high pressure) and the channeling and microstructures in the plates (low pressure) due to the vacuum drawn. The apparatus and method may be used to fabricate microcapillary arrays for chemical electrophoresis; for example, any apparatus using a network of microfluidic channels embedded between plates of glass or similar moderate melting point substrates with a gradual softening point curve, or for assembly of glass-based substrates onto larger substrates, such as in flat panel display systems.

Swierkowski, Steve P. (Livermore, CA); Davidson, James C. (Livermore, CA); Balch, Joseph W. (Livermore, CA)

2001-01-01T23:59:59.000Z

58

Graphene folding on flat substrates  

SciTech Connect (OSTI)

We present a combined experimental-theoretical study of graphene folding on flat substrates. The structure and deformation of the folded graphene sheet are experimentally characterized by atomic force microscopy. The local graphene folding behaviors are interpreted based on nonlinear continuum mechanics modeling and molecular dynamics simulations. Our study on self-folding of a trilayer graphene sheet reports a bending stiffness of about 6.57?eV, which is about four times the reported values for monolayer graphene. Our results reveal that an intriguing free sliding phenomenon occurs at the interlayer van der Waals interfaces during the graphene folding process. This work demonstrates that it is a plausible venue to quantify the bending stiffness of graphene based on its self-folding conformation on flat substrates. The findings reported in this work are useful to a better understanding of the mechanical properties of graphene and in the pursuit of its applications.

Chen, Xiaoming; Zhao, Yadong; Ke, Changhong, E-mail: cke@binghamton.edu [Department of Mechanical Engineering, State University of New York at Binghamton, Binghamton, New York 13902 (United States); Zhang, Liuyang; Wang, Xianqiao [College of Engineering, University of Georgia, Athens, Georgia 30602 (United States)

2014-10-28T23:59:59.000Z

59

All conformally flat pure radiation metrics  

E-Print Network [OSTI]

The complete class of conformally flat, pure radiation metrics is given, generalising the metric recently given by Wils.

S. Brian Edgar; Garry Ludwig

1996-12-20T23:59:59.000Z

60

Regenerate metal-plating baths to cut waste and save  

SciTech Connect (OSTI)

During electrode-based metal plating of equipment components, the formation of an electrical field causes metal deposits to be thicker at edges and seams, and thinner on flat surfaces. And, electrode-based methods consume large amounts of energy. Electroless-nickel (EN) -- or autocatalytic -- plating systems were pioneered in the 1940s to solve these problems. EN plating produces a more uniform coating, irrespective of the complexity of the part, and it consumes less electricity, since to electric current is required during plating. Plating in an EN system results from a chemical reaction between nickel in the bath and the substrate of the equipment component. The downside of electroless plating, however, is the limited life of the nickel bath, and the large volume of metal waste produced by bath disposal. Ionsep Corp. (Wilmington, Del.) has developed an electrodialytic system that continuously reforms the EN plating baths, to give them longer life. Its patented system has been successfully laboratory tested in a 1-ft{sup 2} cell, and the firm recently won a $250,000 grant from the US Dept. of Energy (Washington, D.C.) and Environmental Protection Agency (Washington, D.C.), to design and engineer a commercial-scale version of the system.

NONE

1995-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


61

Windy Flats | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160 East 300 South Place:ReferenceEdit JumpWill County,Windspire EnergyFlats Jump to:

62

Flat Plate PV Module Eligibility Listing Procedure Updated 6/2/14 Senate Bill 1 (SB1) defines the solar incentive programs for California, and flat plate PV  

E-Print Network [OSTI]

Commission. 3 . The manufacturer gets their product certified to ANSI/UL 1703 by a NRTL whose OSHA. The manufacturer emails a copy of the ANSI/UL 1703 certification indicating authorization to apply the NRTL's mark (the NRTL). The multiple listing process is how the listing agency certifies privatelabeled products

63

Nitrided Metallic Bipolar Plates  

SciTech Connect (OSTI)

The objectives are: (1) Develop and optimize stainless steel alloys amenable to formation of a protective Cr-nitride surface by gas nitridation, at a sufficiently low cost to meet DOE targets and with sufficient ductility to permit manufacture by stamping. (2) Demonstrate capability of nitridation to yield high-quality stainless steel bipolar plates from thin stamped alloy foils (no significant stamped foil warping or embrittlement). (3) Demonstrate single-cell fuel cell performance of stamped and nitrided alloy foils equivalent to that of machined graphite plates of the same flow-field design ({approx}750-1,000 h, cyclic conditions, to include quantification of metal ion contamination of the membrane electrode assembly [MEA] and contact resistance increase attributable to the bipolar plates). (4) Demonstrate potential for adoption in automotive fuel cell stacks. Thin stamped metallic bipolar plates offer the potential for (1) significantly lower cost than currently-used machined graphite bipolar plates, (2) reduced weight/volume, and (3) better performance and amenability to high volume manufacture than developmental polymer/carbon fiber and graphite composite bipolar plates. However, most metals exhibit inadequate corrosion resistance in proton exchange membrane fuel cell (PEMFC) environments. This behavior leads to high electrical resistance due to the formation of surface oxides and/or contamination of the MEA by metallic ions, both of which can significantly degrade fuel cell performance. Metal nitrides offer electrical conductivities up to an order of magnitude greater than that of graphite and are highly corrosion resistant. Unfortunately, most conventional coating methods (for metal nitrides) are too expensive for PEMFC stack commercialization or tend to leave pinhole defects, which result in accelerated local corrosion and unacceptable performance.

Brady, Michael P [ORNL; Tortorelli, Peter F [ORNL; Pihl, Josh A [ORNL; Toops, Todd J [ORNL; More, Karren Leslie [ORNL; Meyer III, Harry M [ORNL; Vitek, John Michael [ORNL; Wang, Heli [National Renewable Energy Laboratory (NREL); Turner, John [National Renewable Energy Laboratory (NREL); Wilson, Mahlon [Los Alamos National Laboratory (LANL); Garzon, Fernando [Los Alamos National Laboratory (LANL); Rockward, Tommy [Los Alamos National Laboratory (LANL); Connors, Dan [GenCell Corp; Rakowski, Jim [Allegheny Ludlum; Gervasio, Don [Arizona State University

2008-01-01T23:59:59.000Z

64

Plating under reduced pressure  

SciTech Connect (OSTI)

Plating under reduced pressure was evaluated for both electroless nickel and electrodeposited copper systems. The objective was to reduce pitting of these coatings thereby further enhancing their usage for diamond turning applications. Cursory experiments with electroless nickel showed reduced porosity when deposition was done at around 500 torr. Detailed experiments with electrodeposited copper at around 100 torr provided similar results. Scanning tunneling microscopy was effectively used to show the improvement in the copper deposits plated under reduced pressure. Benefits included reduced surface roughness and finer and denser grain structure.

Dini, J.W.; Beat, T.G.; Cowden, W.C. (Lawrence Livermore National Lab., CA (United States)); Ryan, L.E.; Hewitt, W.B. (TRW, Inc., Redondo Beach, CA (United States))

1992-06-01T23:59:59.000Z

65

Nuclear reactor alignment plate configuration  

DOE Patents [OSTI]

An alignment plate that is attached to a core barrel of a pressurized water reactor and fits within slots within a top plate of a lower core shroud and upper core plate to maintain lateral alignment of the reactor internals. The alignment plate is connected to the core barrel through two vertically-spaced dowel pins that extend from the outside surface of the core barrel through a reinforcement pad and into corresponding holes in the alignment plate. Additionally, threaded fasteners are inserted around the perimeter of the reinforcement pad and into the alignment plate to further secure the alignment plate to the core barrel. A fillet weld also is deposited around the perimeter of the reinforcement pad. To accomodate thermal growth between the alignment plate and the core barrel, a gap is left above, below and at both sides of one of the dowel pins in the alignment plate holes through with the dowel pins pass.

Altman, David A; Forsyth, David R; Smith, Richard E; Singleton, Norman R

2014-01-28T23:59:59.000Z

66

Independent Oversight Review, Rocky Flats Environmental Technology...  

Energy Savers [EERE]

- March 2000 March 2000 Review of the Rocky Flats Environmental Technology Site Transportation Emergency Management Program This report provides the results of an independent...

67

elementsair ceramic plate  

E-Print Network [OSTI]

many current day applications. Anything that creates waste heat (e.g. engines, computers, electronicsearth elementsair L ceramic plate Thermoelectric Module Construction for Low Temperature Gradient Power Generation Y. Meydbray, R. Singh, Ali Shakouri University of California at Santa Cruz, Electrical

68

Effects of axial plate heat conduction on the thermal performance of a laminar counterflow flat plate heat exchanger  

E-Print Network [OSTI]

UC (I ~ M) ?0 e DO VC {I, N) ?O. DO UH(I, l)=0 DO VH (I, 1) ?O. DO ALONG FLUID CENTERLINE DO 6 I?1, N FOR VOBTICITY AMD STREAM WH(I, M) =0 ODO WC (I ~ 'l) =Do ODD PSIC(I ~ 1) =le ODO-RD PSIH fI, N) 1. ODO-BD CENTERLINE VALOIS FOB TH...-VELOCITY HOT' CALL POUT (VH r NrN) WRITE (6, 80) PRINT ~ HOT ILUID TEHPZRATURE ~ CALL POUT, {TH ~ N, N) llRITE (6 ~ 80) IF (IPLAG ZO. 1) GO TO 37 37 43 712 PRINTi o SOLID TEMPERATURE ~ CALL POUT (TS, H, 1) GO TO 42 WRITE (6 ~ 43) FORMAT(/, 20X, i...

Demko, Jonathan Alexander

2012-06-07T23:59:59.000Z

69

Turkey Flat Site Effects Test Area The Turkey-Flat strong motion "blind"  

E-Print Network [OSTI]

Turkey Flat Site Effects Test Area B B' A A' C C' The Turkey-Flat strong motion "blind" prediction experiment "Blind" Test Approach · Conduct high quality field and laboratory tests to characterize Geological Survey Turkey Flat, USA Site Effects Test Area: "Blind" Test of Predicted Ground Response

Oprsal, Ivo

70

Flat Directions and Baryogenesis in Supersymmetric Theories  

E-Print Network [OSTI]

Flat directions are a generic feature of supersymmetric theories. They are of cosmological interest because they can lead to coherent production of scalars. In the early universe such flat directions could be dangerous due to the potentially large energy density and the late decay of the associated scalars when they have only $1/M_p$ couplings (Polonyi problem). On the other hand, flat directions among the standard model fields can carry baryon number and lead to a possible mechanism for baryogenesis (Affleck Dine baryogenesis). When considering the cosmological consequences of the flat directions, it is important to take into account the soft potential with curvature of order the Hubble constant due to supersymmetry breaking in the early universe. In this talk, we discuss flat directions, their potential cosmological implications focusing on Affleck-Dine baryogenesis, and how the standard picture of their evolution must be modified in the presence of the large supersymmetry breaking in the early universe.

Lisa Randall

1995-07-08T23:59:59.000Z

71

Fuel cell end plate structure  

DOE Patents [OSTI]

The end plates (16) of a fuel cell stack (12) are formed of a thin membrane. Pressure plates (20) exert compressive load through insulation layers (22, 26) to the membrane. Electrical contact between the end plates (16) and electrodes (50, 58) is maintained without deleterious making and breaking of electrical contacts during thermal transients. The thin end plate (16) under compressive load will not distort with a temperature difference across its thickness. Pressure plate (20) experiences a low thermal transient because it is insulated from the cell. The impact on the end plate of any slight deflection created in the pressure plate by temperature difference is minimized by the resilient pressure pad, in the form of insulation, therebetween.

Guthrie, Robin J. (East Hartford, CT); Katz, Murray (Newington, CT); Schroll, Craig R. (Glastonbury, CT)

1991-04-23T23:59:59.000Z

72

Apparatus for tensile testing plate-type ceramic specimens  

DOE Patents [OSTI]

Apparatus is described for gripping a plate-type tensile specimen having generally T-shaped end regions in a dynamic tension fatigue testing apparatus comprising an annular housing having an open-ended elongated cavity therein, a plurality of hydraulic piston means supported by the housing in a spaced array about the cavity, and a specimen-supporting plate means overlying the piston means at one end of the elongated cavity and displaceable by said piston means in a longitudinal direction with respect to the longitudinal axis of the cavity, said apparatus for gripping a flat plate-type tensile specimen comprising: a pair of elongated pull rods each having oppositely disposed first and second end regions; a pair of mounting means carried by said plate means with each mounting means for pivotally attaching the first end region of each of said pull rods in a central region of said plate means for supporting said pair of elongated pull rods in a side-by-side relationship along a common longitudinal centerline within said cavity; recess means in the second end region of each of said pull rods in adjacently disposed surface regions thereof with said recess means facing one another and each adapted to receive one side of one of the generally T-shaped end regions of the plate-type tensile specimen; and load-bearing means positionable in each of said recess means and adapted to bear against a shoulder on each side of the generally T-shaped end region of the plate-type tensile specimen when a tensile loading is applied thereon.

Liu, K.C.

1993-08-24T23:59:59.000Z

73

Flat panel ferroelectric electron emission display system  

DOE Patents [OSTI]

A device which can produce a bright, raster scanned or non-raster scanned image from a flat panel. Unlike many flat panel technologies, this device does not require ambient light or auxiliary illumination for viewing the image. Rather, this device relies on electrons emitted from a ferroelectric emitter impinging on a phosphor. This device takes advantage of a new electron emitter technology which emits electrons with significant kinetic energy and beam current density.

Sampayan, Stephen E. (Manteca, CA); Orvis, William J. (Livermore, CA); Caporaso, George J. (Livermore, CA); Wieskamp, Ted F. (Livermore, CA)

1996-01-01T23:59:59.000Z

74

Rocky Flats Environmental Technology Site Archived Soil & Groundwater...  

Office of Environmental Management (EM)

Rocky Flats Environmental Technology Site Archived Soil & Groundwater Master Reports Rocky Flats Environmental Technology Site Archived Soil & Groundwater Master Reports Rocky...

75

LM Records Handling System (LMRHS01) - Rocky Flats Environmental...  

Office of Environmental Management (EM)

LM Records Handling System (LMRHS01) - Rocky Flats Environmental Records Database, Office of Legacy Management LM Records Handling System (LMRHS01) - Rocky Flats Environmental...

76

Study of active control of instability in a boundary layer over a flat plate flow  

E-Print Network [OSTI]

). . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 9 34 Power spectrum and time record at a freestream of 136. 8 mm/s, 2. 5 mm off the bottom wall and 25. 4 mm upstream of the actuator. . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 35 Power specnum and time record at a Ireestream... of 201. 3 mm/s, 2. 5 mm off the bottom wall and 25. 4 mm upstream of the actuator. . . . . . . . . . . . . . . . . . . . . . . . . . . 41 FIGURE Page 36 Power spectrum and time record at a &eestream of 263. 8 mm/s, 2. 5 mm off the bottom wall and 25...

Oryu, Hiroshi

2000-01-01T23:59:59.000Z

77

Review of Consensus Standard Spectra for Flat Plate and Concentrating Photovoltaic Performance  

SciTech Connect (OSTI)

Consensus standard reference terrestrial solar spectra are used to establish nameplate ratings for photovoltaic device performance at standard reporting conditions. This report describes reference solar spectra developed in the United States and international consensus standards community which are widely accepted as of this writing (June 2011).

Myers, D.

2011-09-01T23:59:59.000Z

78

The effect of injection hole geometry on flat plate film cooling and heat transfer  

E-Print Network [OSTI]

conducted at 50 000 Reynolds number , wi th bo th a ir and C02 inject ion and at f our b lowing ratios for r\\ and a l l five b lowing ratios for h . Each slot con f igurat ion was designed to give a total cross-sectional area equal to that of the holes... Averaged Heat Trans fer Coeff icient Ratio for 45? Hole Injection 20 approx imate ly 1.05. In contrast to 0? hole injection, 45? hole inject ion projects a larger cross-sect ional area to the mainf low, wh i ch results i n h igher turbu lence...

Madsen, Eric Perry

1994-01-01T23:59:59.000Z

79

An experimental study of radial jet reattachment on a flat plate  

E-Print Network [OSTI]

with results obtained by Vogei and Eaton [3]. Their experiments For a backward facing step showed that the point of maximum turbulence intensity occurs just prior to reattachment. It was also found that in addition to location, geometric test configuration... the RdF Corporation. The Ii I CRO-FO I L heat Flow sensor cons i sts of two thermocoup 1 es sandwiched around a center of known thermal conductivity. The sensor itself was only . 012 inches thick and comes from the factory pre-calibrated and ready...

MacGregor, John Donald

1986-01-01T23:59:59.000Z

80

Flow field characteristics of a radial jet reattaching on a flat plate  

E-Print Network [OSTI]

' V, : 30. 48 m/s ? 1 0 1 2 3 4 5 6 r/rb 0. 3 0. 2 b eeeeo 2. 5 mm 5. 0 mm 7. 5 mm 0. 1 0. 0 ? 0. 1? ? 0. 2? Xp/b . ' 0 8, : 10' V, [ 60. 06 m/s 0 1 2 3 4 r/rb Figure 12. Continued, 6 0. 3 0. 2 b 2. 5 mm 5. 0 nsm 7. 5 mm 0, 1... 0. 0 ? 0. 1 ? 0. 2 0. 3 Xp/b 8, : ? 10' V, 30. 45 m/s 0 1 2 3 4 5 6 r/rb 0. 3 0. 2 b 2. 5 mm 5. 0 mm 7. 5 mm 0. 1 0. 0 ? 0. 1 ceeeeecS ? 0. 2? Xr/b 0, ; ? 10 45. 72 rn/s 0 1 2 3 4 r/rb Vigure 12. Continued. 63 0. 2 Z. 5 rnm...

Carbone, Janique Sylvia

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


81

CATALYZED COMBUSTION IN A FLAT PLATE BOUNDARY LAYER II. NUMERICAL CALCULATIONS  

E-Print Network [OSTI]

at Simulated Gas Turbine Combustor Operating Conditions",on the use of catalytic combustors for aircraft gas turbineof prototype catalytic combustor configurations. studies are

Schefer, R.

2010-01-01T23:59:59.000Z

82

Climatically Diverse Data Set for Flat-Plate PV Module Model Validations (Presentation)  

SciTech Connect (OSTI)

Photovoltaic (PV) module I-V curves were measured at Florida, Colorado, and Oregon locations to provide data for the validation and development of models used for predicting the performance of PV modules.

Marion, B.

2013-05-01T23:59:59.000Z

83

Validation of Multiple Tools for Flat Plate Photovoltaic Modeling Against Measured Data  

SciTech Connect (OSTI)

This report expands upon a previous work by the same authors, published in the 40th IEEE Photovoltaic Specialists conference. In this validation study, comprehensive analysis is performed on nine photovoltaic systems for which NREL could obtain detailed performance data and specifications, including three utility-scale systems and six commercial scale systems. Multiple photovoltaic performance modeling tools were used to model these nine systems, and the error of each tool was analyzed compared to quality-controlled measured performance data. This study shows that, excluding identified outliers, all tools achieve annual errors within +/-8% and hourly root mean squared errors less than 7% for all systems. It is further shown using SAM that module model and irradiance input choices can change the annual error with respect to measured data by as much as 6.6% for these nine systems, although all combinations examined still fall within an annual error range of +/-8.5%. Additionally, a seasonal variation in monthly error is shown for all tools. Finally, the effects of irradiance data uncertainty and the use of default loss assumptions on annual error are explored, and two approaches to reduce the error inherent in photovoltaic modeling are proposed.

Freeman, J.; Whitmore, J.; Blair, N.; Dobos, A. P.

2014-08-01T23:59:59.000Z

84

CATALYZED COMBUSTION IN A FLAT PLATE BOUNDARY LAYER I. EXPERIMENTAL MEASUREMENTS AND COMPARISON WITH NUMERICAL CALCULATIONS  

E-Print Network [OSTI]

l~ Roberts, "Catathermal Combustion: A New Process for Lm'l-significant gas phase combustion is induced by the presenceInternational) on Combustion (to be published), The

Robben, R.

2010-01-01T23:59:59.000Z

85

CATALYZED COMBUSTION IN A FLAT PLATE BOUNDARY LAYER II. NUMERICAL CALCULATIONS  

E-Print Network [OSTI]

D.G. , Fourteenth Sympo- sium (International) on Combustion,The Combustion Institute, Pittsburgh, 107 (1973). Wilson,Program for Calculation of Combustion Reaction Equilibrium

Schefer, R.

2010-01-01T23:59:59.000Z

86

Flat-Plate Photovoltaic Balance of System Basics | Department of Energy  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector General Office0-72.pdf Flash2010-72.pdf Flash2010-72.pdf MoreFlash_2010-49.pdf

87

Solar Radiation Data Manual for Flat-Plate and Concentrating Collectors  

Office of Scientific and Technical Information (OSTI)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation InInformation In closing, an overarchingInformation science.govInformation* - '

88

Channel plate for DNA sequencing  

DOE Patents [OSTI]

This invention is a channel plate that facilitates data compaction in DNA sequencing. The channel plate has a length, a width and a thickness, and further has a plurality of channels that are parallel. Each channel has a depth partially through the thickness of the channel plate. Additionally an interface edge permits electrical communication across an interface through a buffer to a deposition membrane surface. 15 figs.

Douthart, R.J.; Crowell, S.L.

1998-01-13T23:59:59.000Z

89

An experimental study of the vibration of modified cantilever plates  

E-Print Network [OSTI]

wings and larger sweep angles. For complete vibration and flutter anal- ysis of these components it is necessary that the modes and frequencies of natural vibration be closely established. Flat cantilever plates (I). serve as a good analogy... of the wings for vibration study. The wings, however, are not usually true cantilevers but are fastened along two lines. One of these lines is along the skin of the fuselage and the other is along the center line of the craft. JL moment is applied...

Read, James McPherson

1954-01-01T23:59:59.000Z

90

Carbon-assisted flyer plates  

DOE Patents [OSTI]

A laser driven flyer plate utilizing an optical fiber connected to a laser. The end of the optical fiber has a layer of carbon and a metal layer deposited onto it. The carbon layer provides the laser induced plasma which is superior to the plasma produced from most metals. The carbon layer plasma is capable of providing a flatter flyer plate, converting more of the laser energy to driving plasma, promoting a higher flyer plate acceleration, and providing a more uniform pulse behind the plate. In another embodiment, the laser is in optical communication with a substrate onto which a layer of carbon and a layer of metal have been deposited.

Stahl, David B. (Los Alamos, NM); Paisley, Dennis L. (Santa Fe, NM)

1994-01-01T23:59:59.000Z

91

Wind tunnel simulation of wind effects and associated displacement hazards on flat surface construction materials such as plywood  

E-Print Network [OSTI]

and converted to velocity using the dynamic pressure conversion equation (developed in Appendix A) Q I = 0. 00256 V (2) The individual pressures measured at the ports were averaged across the area represented by each port to yield an integrated pressure... layer undergoes a transition to turbulent. The Reynolds number for laminar flow on a flat plate varies from approximately 3. 2 x 10' to 3. 0 x 10 depending on the relative smoothness of the plate surface [Parker, 1974]. The data for these tests were...

Madeley, Jack T.

1996-01-01T23:59:59.000Z

92

Graphene based Ultra-Thin Flat Lenses  

E-Print Network [OSTI]

on graphene, the world’s thinnest known material. Monolayers and low number multilayers of graphene were fabricated into Fresnel zones to produce Fresnel zone plates which utilize the reflection and transmission properties of graphene for their operation...

Kong, Xiang-Tian; Khan, Ammar A.; Kidambi, Piran R.; Deng, Sunan; Yetisen, Ali K.; Dlubak, Bruno; Hiralal, Pritesh; Montelongo, Yunuen; Bowen, James; Xavier, Stéphane; Jiang, Kyle; Amaratunga, Gehan A. J.; Hofmann, Stephan; Wilkinson, Timothy D.; Dai, Qing; Butt, Haider

2015-01-07T23:59:59.000Z

93

Rock bed behavior and reverse thermosiphon effects  

SciTech Connect (OSTI)

Two rock beds, in the Mark Jones and Doug Balcomb houses, have been instrumented, monitored, and analyzed. Observed experimental operation has been compared with, or explained by, theoretical predictions. The latter are based on one-dimensional finite-difference computer calculation of rock bed charging and discharging, with fixed or variable inputs of air flow rate and temperature. Both rock beds exhibit appreciable loss of stored heat caused by lack of backdraft dampers or incomplete closure of such dampers. These topics are discussed, and some improvements that might be made in future installations are noted.

Perry, J.E.

1980-01-01T23:59:59.000Z

94

Metal vapor arc ion plating  

DOE Patents [OSTI]

A method and apparatus for ion plating are described. The apparatus uses more negative than a first electrode voltage in a vacuum arc remelt system to attract low energy ions from the anode electrode to the article to be plated. 2 figs.

Bertram, L.A.; Fisher, R.W.; Mattox, D.M.; Zanner, F.J.

1986-09-09T23:59:59.000Z

95

Project plan: Procedure system design for the Rocky Flats Plant Emergency Preparedness Program  

SciTech Connect (OSTI)

This procedure system is being designed for the Rocky Flats Plant Emergency Preparedness Program (EPP) to: assess the procedural needs of the Emergency Preparedness Program in light of the existing Rocky Flats Plant policies, plans, procedures, and applicable DOE orders; design the structure of the Emergency Preparedness Program procedural system based on the classes of procedures needed, the types of procedures (procedures vs job outline), the sections of procedures required, and the timetable for procedure maintenance; develop boiler plate formats for the various authors in writing the necessary standardized procedures; develop a list of all the necessary procedures that must be produced for Emergency Preparedness Program; and provide consistency for department-wide activities relating to the quality control in writing, distribution, and revising procedures for Emergency Preparedness Program. 23 refs., 18 figs.

Hodgin, C.R.; Brown-Strattan, M.

1989-10-01T23:59:59.000Z

96

Flat Spacetime Vacuum in Loop Quantum Gravity  

E-Print Network [OSTI]

We construct a state in the loop quantum gravity theory with zero cosmological constant, which should correspond to the flat spacetime vacuum solution. This is done by defining the loop transform coefficients of a flat connection wavefunction in the holomorphic representation which satisfies all the constraints of quantum General Relativity and it is peaked around the flat space triads. The loop transform coefficients are defined as spin foam state sum invariants of the spin networks embedded in the spatial manifold for the SU(2) quantum group. We also obtain an expression for the vacuum wavefunction in the triad represntation, by defining the corresponding spin networks functional integrals as SU(2) quantum group state sums.

A. Mikovic

2004-04-06T23:59:59.000Z

97

Chemical tracking at the Rocky Flats Plant  

SciTech Connect (OSTI)

EG&G Rocky Flats, Inc., has developed a chemical tracking system to support compliance with the Emergency Planning and community Right-to-Know Act (EPCRA) at the Rocky Flats Plant. This system, referred to as the EPCRA Chemical Control system (ECCS), uses bar code technology to uniquely identify and track the receipt, distribution, and use of chemicals. Chemical inventories are conducted using hand-held electronic scanners to update a site wide chemical database on a VAX 6000 computer. Information from the ECCS supports preparation of the EPCRA Tier II and Form R reports on chemical storage and use.

Costain, D.B.

1994-04-01T23:59:59.000Z

98

High loading uranium fuel plate  

DOE Patents [OSTI]

Two embodiments of a high uranium fuel plate are disclosed which contain a meat comprising structured uranium compound confined between a pair of diffusion bonded ductile metal cladding plates uniformly covering the meat, the meat having a uniform high fuel loading comprising a content of uranium compound greater than about 45 Vol. % at a porosity not greater than about 10 Vol. %. In a first embodiment, the meat is a plurality of parallel wires of uranium compound. In a second embodiment, the meat is a dispersion compact containing uranium compound. The fuel plates are fabricated by a hot isostatic pressing process.

Wiencek, Thomas C. (Bolingbrook, IL); Domagala, Robert F. (Indian Head Park, IL); Thresh, Henry R. (Palos Heights, IL)

1990-01-01T23:59:59.000Z

99

Neal Lane: Science in a Flat World  

SciTech Connect (OSTI)

Lane discusses the changes that have taken place in the world since World War II that have made it "flatter," referring to Thomas L. Friedman's book, The World is Flat. Friedman's main premise is that inexpensive telecommunications is bringing about unhampered international competition, the demise of economic stability, and a trend toward outsourcing services, such as computer programming, engineering and science research.

Neal Lane

2006-09-12T23:59:59.000Z

100

Actin Polymerization: Forcing Flat Faces Forward  

E-Print Network [OSTI]

Actin Polymerization: Forcing Flat Faces Forward Arpita Upadhyaya1 and Alexander van Oudenaarden2 Actin polymerization has been shown to be sufficient to propel curved objects, for example beads polymerization forms the basis of numerous forms of cell motility. Actin is thought to polymerize at the leading

van Oudenaarden, Alexander

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


101

Neal Lane: Science in a Flat World  

ScienceCinema (OSTI)

Lane discusses the changes that have taken place in the world since World War II that have made it "flatter," referring to Thomas L. Friedman's book, The World is Flat. Friedman's main premise is that inexpensive telecommunications is bringing about unhampered international competition, the demise of economic stability, and a trend toward outsourcing services, such as computer programming, engineering and science research.

Neal Lane

2010-09-01T23:59:59.000Z

102

Fluids Mechanics -1 Consider a circular plate of outer radius Ro (a portion of which is shown in the figure). A fluid filled gap of thickness h(t)  

E-Print Network [OSTI]

Fluids Mechanics - 1 Consider a circular plate of outer radius Ro (a portion of which is shown in the figure). A fluid filled gap of thickness h(t) exists between the bottom of the plate and the flat surface that the fluid filling the gap is incompressible, inviscid and its motion is irrotational. Also assume the radial

Virginia Tech

103

Normal and lateral Casimir forces between deformed plates  

SciTech Connect (OSTI)

The Casimir force between macroscopic bodies depends strongly on their shape and orientation. To study this geometry dependence in the case of two deformed metal plates, we use a path-integral quantization of the electromagnetic field which properly treats the many-body nature of the interaction, going beyond the commonly used pairwise summation (PWS) of van der Waals forces. For arbitrary deformations we provide an analytical result for the deformation induced change in the Casimir energy, which is exact to second order in the deformation amplitude. For the specific case of sinusoidally corrugated plates, we calculate both the normal and the lateral Casimir forces. The deformation induced change in the Casimir interaction of a flat and a corrugated plate shows an interesting crossover as a function of the ratio of the mean plate distance H to the corrugation length {lambda}: For {lambda}<>H. The amplitude of the lateral force between two corrugated plates which are out of registry is shown to have a maximum at an optimal wavelength of {lambda}{approx_equal}2.5 H. With increasing H/{lambda} > or approx. 0.3 the PWS approach becomes a progressively worse description of the lateral force due to many-body effects. These results may be of relevance for the design and operation of novel microelectromechanical systems (MEMS) and other nanoscale devices.

Emig, Thorsten; Hanke, Andreas; Golestanian, Ramin; Kardar, Mehran [Institut fuer Theoretische Physik, Universitaet zu Koeln, Zuelpicher Strasse 77, D-50937 Cologne (Germany); Institut fuer Theoretische Physik, Universitaet Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart (Germany); Institute for Advanced Studies in Basic Sciences, Zanjan 45195-159 (Iran, Islamic Republic of); Institute for Studies in Theoretical Physics and Mathematics, P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of); Physics Department, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

2003-02-01T23:59:59.000Z

104

Carbon-assisted flyer plates  

DOE Patents [OSTI]

A laser driven flyer plate is described utilizing an optical fiber connected to a laser. The end of the optical fiber has a layer of carbon and a metal layer deposited onto it. The carbon layer provides the laser induced plasma which is superior to the plasma produced from most metals. The carbon layer plasma is capable of providing a flatter flyer plate, converting more of the laser energy to driving plasma, promoting a higher flyer plate acceleration, and providing a more uniform pulse behind the plate. In another embodiment, the laser is in optical communication with a substrate onto which a layer of carbon and a layer of metal have been deposited. 2 figures.

Stahl, D.B.; Paisley, D.L.

1994-04-12T23:59:59.000Z

105

Flat Space Limit of (Higher-Spin) Cardy Formula  

E-Print Network [OSTI]

In this note I derive the flat space limit of the modified Cardy formula associated with inner horizons and show that it reproduces the correct Galilean conformal field theory counting of flat space cosmology microstates. l also determine the entropy of flat space cosmologies in flat space chiral gravity in this way. In addition, I derive a Cardy-like expression for flat space cosmologies with spin-3 charges and thus give a prediction for the corresponding Galilean conformal field theory counting of flat space cosmology microstates with spin-3 charges.

Max Riegler

2014-11-14T23:59:59.000Z

106

Radiation content of Conformally flat initial data  

E-Print Network [OSTI]

We study the radiation of energy and linear momentum emitted to infinity by the headon collision of binary black holes, starting from rest at a finite initial separation, in the extreme mass ratio limit. For these configurations we identify the radiation produced by the initially conformally flat choice of the three geometry. This identification suggests that the radiated energy and momentum of headon collisions will not be dominated by the details of the initial data for evolution of holes from initial proper separations $L_0\\geq7M$. For non-headon orbits, where the amount of radiation is orders of magnitude larger, the conformally flat initial data may provide a relative even better approximation.

C. O. Lousto; R. H. Price

2004-01-11T23:59:59.000Z

107

Basic TRUEX process for Rocky Flats Plant  

SciTech Connect (OSTI)

The Generic TRUEX Model was used to develop a TRUEX process flowsheet for recovering the transuranics (Pu, Am) from a nitrate waste stream at Rocky Flats Plant. The process was designed so that it is relatively insensitive to changes in process feed concentrations and flow rates. Related issues are considered, including solvent losses, feed analysis requirements, safety, and interaction with an evaporator system for nitric acid recycle.

Leonard, R.A.; Chamberlain, D.B.; Dow, J.A.; Farley, S.E.; Nunez, L.; Regalbuto, M.C.; Vandegrift, G.F.

1994-08-01T23:59:59.000Z

108

Whiskey Flats Geothermal Area | 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 InspectorConcentrating SolarElectric Coop,SaveWhiskey Flats Geothermal Area Jump to: navigation, search

109

Remote geologic structural analysis of Yucca Flat  

SciTech Connect (OSTI)

The Remote Geologic Analysis (RGA) system was developed by Pacific Northwest Laboratory (PNL) to identify crustal structures that may affect seismic wave propagation from nuclear tests. Using automated methods, the RGA system identifies all valleys in a digital elevation model (DEM), fits three-dimensional vectors to valley bottoms, and catalogs all potential fracture or fault planes defined by coplanar pairs of valley vectors. The system generates a cluster hierarchy of planar features having greater-than-random density that may represent areas of anomalous topography manifesting structural control of erosional drainage development. Because RGA uses computer methods to identify zones of hypothesized control of topography, ground truth using a well-characterized test site was critical in our evaluation of RGA's characterization of inaccessible test sites for seismic verification studies. Therefore, we applied RGA to a study area centered on Yucca Flat at the Nevada Test Site (NTS) and compared our results with both mapped geology and geologic structures and with seismic yield-magnitude models. This is the final report of PNL's RGA development project for peer review within the US Department of Energy Office of Arms Control (OAC) seismic-verification community. In this report, we discuss the Yucca Flat study area, the analytical basis of the RGA system and its application to Yucca Flat, the results of the analysis, and the relation of the analytical results to known topography, geology, and geologic structures. 41 refs., 39 figs., 2 tabs.

Foley, M.G.; Heasler, P.G.; Hoover, K.A. (Pacific Northwest Lab., Richland, WA (United States)); Rynes, N.J. (Northern Illinois Univ., De Kalb, IL (United States)); Thiessen, R.L.; Alfaro, J.L. (Washington State Univ., Pullman, WA (United States))

1991-12-01T23:59:59.000Z

110

Remote geologic structural analysis of Yucca Flat  

SciTech Connect (OSTI)

The Remote Geologic Analysis (RGA) system was developed by Pacific Northwest Laboratory (PNL) to identify crustal structures that may affect seismic wave propagation from nuclear tests. Using automated methods, the RGA system identifies all valleys in a digital elevation model (DEM), fits three-dimensional vectors to valley bottoms, and catalogs all potential fracture or fault planes defined by coplanar pairs of valley vectors. The system generates a cluster hierarchy of planar features having greater-than-random density that may represent areas of anomalous topography manifesting structural control of erosional drainage development. Because RGA uses computer methods to identify zones of hypothesized control of topography, ground truth using a well-characterized test site was critical in our evaluation of RGA`s characterization of inaccessible test sites for seismic verification studies. Therefore, we applied RGA to a study area centered on Yucca Flat at the Nevada Test Site (NTS) and compared our results with both mapped geology and geologic structures and with seismic yield-magnitude models. This is the final report of PNL`s RGA development project for peer review within the US Department of Energy Office of Arms Control (OAC) seismic-verification community. In this report, we discuss the Yucca Flat study area, the analytical basis of the RGA system and its application to Yucca Flat, the results of the analysis, and the relation of the analytical results to known topography, geology, and geologic structures. 41 refs., 39 figs., 2 tabs.

Foley, M.G.; Heasler, P.G.; Hoover, K.A. [Pacific Northwest Lab., Richland, WA (United States); Rynes, N.J. [Northern Illinois Univ., De Kalb, IL (United States); Thiessen, R.L.; Alfaro, J.L. [Washington State Univ., Pullman, WA (United States)

1991-12-01T23:59:59.000Z

111

Geothermal: Sponsored by OSTI -- Telephone Flat Geothermal Development...  

Office of Scientific and Technical Information (OSTI)

Telephone Flat Geothermal Development Project Environmental Impact Statement Environmental Impact Report. Final: Comments and Responses to Comments Geothermal Technologies Legacy...

112

Plates for vacuum thermal fusion  

DOE Patents [OSTI]

A process for effectively bonding arbitrary size or shape substrates. The process incorporates vacuum pull down techniques to ensure uniform surface contact during the bonding process. The essence of the process for bonding substrates, such as glass, plastic, or alloys, etc., which have a moderate melting point with a gradual softening point curve, involves the application of an active vacuum source to evacuate interstices between the substrates while at the same time providing a positive force to hold the parts to be bonded in contact. This enables increasing the temperature of the bonding process to ensure that the softening point has been reached and small void areas are filled and come in contact with the opposing substrate. The process is most effective where at least one of the two plates or substrates contain channels or grooves that can be used to apply vacuum between the plates or substrates during the thermal bonding cycle. Also, it is beneficial to provide a vacuum groove or channel near the perimeter of the plates or substrates to ensure bonding of the perimeter of the plates or substrates and reduce the unbonded regions inside the interior region of the plates or substrates.

Davidson, James C. (Livermore, CA); Balch, Joseph W. (Livermore, CA)

2002-01-01T23:59:59.000Z

113

Converting Nested Algebra Expressions into Flat Algebra Expressions  

E-Print Network [OSTI]

Converting Nested Algebra Expressions into Flat Algebra Expressions JAN PAREDAENS University of Antwerp and DIRK VAN GUCHT Indiana University Nested relations generalize ordinary flat relations by allowing tuple values to be either atomic or set valued. The nested algebra is a generalization of the flat

Van Gucht, Dirk

114

Introduction Flattening the Earth Continuation procedure Flat Earth Numerical simulations Continuation from a flat to a round Earth model  

E-Print Network [OSTI]

Introduction Flattening the Earth Continuation procedure Flat Earth Numerical simulations Continuation from a flat to a round Earth model in the coplanar orbit transfer problem M. Cerf1, T. Haberkorn, SADCO 2011, March 2nd M. Cerf, T. Haberkorn, E. Tr´elat Continuation from a flat to a round Earth model

Boyer, Edmond

115

Nuclear reactor fuel structure containing uranium alloy wires embedded in a metallic matrix plate  

DOE Patents [OSTI]

A flat or curved plate structure, to be used as fuel in a nuclear reactor, comprises elongated fissionable wires or strips embedded in a metallic continuous non-fissionable matrix plate. The wires or strips are made predominantly of a malleable uranium alloy, such as uranium silicide, uranium gallide or uranium germanide. The matrix plate is made predominantly of aluminum or an aluminum alloy. The wires or strips are located in a single row at the midsurface of the plate, parallel with one another and with the length dimension of the plate. The wires or strips are separated from each other, and from the surface of the plate, by sufficient thicknesses of matrix material, to provide structural integrity and effective fission product retention, under neutron irradiation. This construction makes it safely feasible to provide a high uranium density, so that the uranium enrichment with uranium 235 may be reduced below about 20%, to deter the reprocessing of the uranium for use in nuclear weapons.

Travelli, A.

1985-10-25T23:59:59.000Z

116

Nuclear reactor fuel structure containing uranium alloy wires embedded in a metallic matrix plate  

SciTech Connect (OSTI)

A flat or curved plate structure, to be used as fuel in a nuclear reactor, comprises elongated fissionable wires or strips embedded in a metallic continuous non-fissionable matrix plate. The wires or strips are made predominantly of a malleable uranium alloy, such as uranium silicide, uranium gallide or uranium germanide. The matrix plate is made predominantly of aluminum or an aluminum alloy. The wires or strips are located in a single row at the midsurface of the plate, parallel with one another and with the length dimension of the plate. The wires or strips are separated from each other, and from the surface of the plate, by sufficient thicknesses of matrix material, to provide structural integrity and effective fission product retention, under neutron irradiation. This construction makes it safely feasible to provide a high uranium density, so that the uranium enrichment with uranium 235 may be reduced below about 20%, to deter the reprocessing of the uranium for use in nuclear weapons.

Travelli, Armando (Hinsdale, IL)

1988-01-01T23:59:59.000Z

117

Flat space (higher spin) gravity with chemical potentials  

E-Print Network [OSTI]

We introduce flat space spin-3 gravity in the presence of chemical potentials and discuss some applications to flat space cosmology solutions, their entropy, free energy and flat space orbifold singularity resolution. Our results include flat space Einstein gravity with chemical potentials as special case. We discover novel types of phase transitions between flat space cosmologies with spin-3 hair and show that the branch that continuously connects to spin-2 gravity becomes thermodynamically unstable for sufficiently large temperature or spin-3 chemical potential.

Michael Gary; Daniel Grumiller; Max Riegler; Jan Rosseel

2014-11-24T23:59:59.000Z

118

Energy Conservation in Flat FRW Cosmology  

E-Print Network [OSTI]

The consequence of energy conservation in the flat Friedmannn-Robertson-Walker (FRW) cosmology is a strictly positive accelerating expansion. A mechanism is proposed for this expansion due to the effect of the attractive (negative) gravitational potential of matter as it is being included within the expanding horizon, and the offsetting work of metric expansion, which takes place at sub-luminal speed. In our semi-classical treatment, we deal with a quintic as the equation for the scale parameter. Implications for modeling the earliest parts of the primordial expansion are discussed.

Steven Maxson

2009-01-07T23:59:59.000Z

119

Geometrical Wake of a Smooth Flat Collimator  

SciTech Connect (OSTI)

A transverse geometrical wake generated by a beam passing through a smooth flat collimator with a gradually varying gap between the upper and lower walls is considered. Based on generalization of the approach recently developed for a smooth circular taper we reduce the electromagnetic problem of the impedance calculation to the solution of two much simpler static problems - a magnetostatic and an electrostatic ones. The solution shows that in the limit of not very large frequencies, the impedance increases with the ratio h/d where h is the width and d is the distance between the collimating jaws. Numerical results are presented for the NLC Post Linac collimator.

Stupakov, G.V.; /SLAC

2011-09-09T23:59:59.000Z

120

Caithness Shepherds Flat | Department of Energy  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of Energy Power Systems EngineeringDepartment of4 Federal6CleanCaithness Shepherds Flat Caithness Shepherds

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


121

Flat Ridge 2 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision has beenFfe2fb55-352f-473b-a2dd-50ae8b27f0a6Theoretical vs Actual DataNext 25 YearsFlat Ridge 2 Facility

122

Flat Ridge Wind Farm | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision has beenFfe2fb55-352f-473b-a2dd-50ae8b27f0a6Theoretical vs Actual DataNext 25 YearsFlat Ridge 2

123

Flat Water Wind Farm | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision has beenFfe2fb55-352f-473b-a2dd-50ae8b27f0a6Theoretical vs Actual DataNext 25 YearsFlat Ridge 2Wind Farm

124

Corrosion resistant metallic bipolar plate  

DOE Patents [OSTI]

A corrosion resistant, electrically conductive component such as a bipolar plate for a PEM fuel cell includes 20 55% Cr, balance base metal such as Ni, Fe, or Co, the component having thereon a substantially external, continuous layer of chromium nitride.

Brady, Michael P. (Oak Ridge, TN); Schneibel, Joachim H. (Knoxville, TN); Pint, Bruce A. (Knoxville, TN); Maziasz, Philip J. (Oak Ridge, TN)

2007-05-01T23:59:59.000Z

125

Optimal control of plate shape with incompatible strain fields  

E-Print Network [OSTI]

A flat plate can bend into a curved surface if it experiences an inhomogeneous growth field. In this article a method is described that numerically determines the optimal growth field giving rise to an arbitrary target shape, optimizing for closeness to the target shape and for growth field smoothness. Numerical solutions are presented, for the full non-symmetric case as well as for simplified one-dimensional and axisymmetric geometries. This system can also be solved semi-analytically by positing an ansatz for the deformation and growth fields in a circular disk with given thickness profile. Paraboloidal, cylindrical and saddle-shaped target shapes are presented as examples, of which the last two exemplify a soft mode arising from a non-axisymmetric deformation of a structure with axisymmetric material properties.

Gareth Wyn Jones; L. Mahadevan

2014-12-22T23:59:59.000Z

126

Ghost condensate model of flat rotation curves  

E-Print Network [OSTI]

An effective action of ghost condensate with higher derivatives creates a source of gravity and mimics a dark matter in spiral galaxies. We present a spherically symmetric static solution of Einstein--Hilbert equations with the ghost condensate at large distances, where flat rotation curves are reproduced in leading order over small ratio of two energy scales characterizing constant temporal and spatial derivatives of ghost field: $\\mu_*^2$ and $\\mu_\\star^2$, respectively, with a hierarchy $\\mu_\\star\\ll \\mu_*$. We assume that a mechanism of hierarchy is provided by a global monopole in the center of galaxy. An estimate based on the solution and observed velocities of rotations in the asymptotic region of flatness, gives $\\mu_*\\sim 10^{19}$ GeV and the monopole scale in a GUT range $\\mu_\\star\\sim 10^{16}$ GeV, while a velocity of rotation $v_0$ is determined by the ratio: $ \\sqrt{2} v_0^2= \\mu_\\star^2/\\mu_*^2$. A critical acceleration is introduced and naturally evaluated of the order of Hubble rate, that represents the Milgrom's acceleration.

V. V. Kiselev

2005-07-29T23:59:59.000Z

127

Risk, media, and stigma at Rocky Flats  

SciTech Connect (OSTI)

Public responses to nuclear technologies are often strongly negative. Events, such as accidents or evidence of unsafe conditions at nuclear facilities, receive extensive and dramatic coverage by the news media. These news stories affect public perceptions of nuclear risks and the geographic areas near nuclear facilities. One result of these perceptions, avoidance behavior, is a form of technological stigma that leads to losses in property values near nuclear facilities. The social amplification of risk is a conceptual framework that attempts to explain how stigma is created through media transmission of information about hazardous places and public perceptions and decisions. This paper examines stigma associated with the US Department of energy`s Rocky Flats facility, a major production plant in the nation`s nuclear weapons complex, located near Denver, Colorado. This study, based upon newspaper analyses and a survey of Denver area residents, finds that the social amplification theory provides a reasonable framework for understanding the events and public responses that took place in regard to Rocky Flats during a 6-year period, beginning with an FBI raid of the facility in 1989.

Flynn, J.; Peters, E.; Mertz, C.K.; Slovic, P. [Decision Research, Eugene, OR (United States)] [Decision Research, Eugene, OR (United States)

1998-12-01T23:59:59.000Z

128

Landscape Evolution at an Active Plate Margin  

E-Print Network [OSTI]

Landscape Evolution at an Active Plate Margin edited and compiled by David R. Jessey and Robert E;32009 Desert Symposium Table of contents Landscape evolution at an active plate margin: a field trip

de Lijser, Peter

129

Tantalum ingots and flat mill products  

SciTech Connect (OSTI)

The specification covers unalloyed tantalum in the following grades: R05200, unalloyed tantalum (vacuum-arc melt or electron-beam furnace melt); R05400, unalloyed tantalum (powder metallurgy consolidation); R05255, tantalum alloy (90% Ta to 10% W, vacuum-arc melt or electron-beam furnace melt). The tantalum can be in the form of ingot, bar, plate, sheet, or strip. The specification includes ordering information, manufacture, chemical requirements, tensile properties, dimensional tolerances, workmanship and finish, sampling, certification, marking and packaging. (JMT)

Not Available

1981-01-01T23:59:59.000Z

130

CNEA Fresh Fuel Plate Characterization Summary Report  

SciTech Connect (OSTI)

Characterization summary report outlining the findings of the fresh fuel examinations of the plates received from CNEA.

D. Keiser; F. Rice

2012-02-01T23:59:59.000Z

131

Electroless metal plating of plastics  

DOE Patents [OSTI]

Process for plating main group metals on aromatic polymers is carried out by the use of a nonaqueous solution of a salt of an alkali metal in a positive valence state and a main group metal in a negative valence state with contact between the solution and polymer providing a redox reaction causing the deposition of the main group metal and the reduction of the polymer. Products from the process exhibit useful decorative and electrical properties.

Krause, Lawrence J. (Chicago, IL)

1986-01-01T23:59:59.000Z

132

Electroless metal plating of plastics  

DOE Patents [OSTI]

Process for plating main group metals on aromatic polymers is carried out by the use of a nonaqueous solution of a salt of an alkali metal in a positive valence state and a main group metal in a negative valence state with contact between the solution and polymer providing a redox reaction causing the deposition of the main group metal and the reduction of the polymer. Products from the process exhibit useful decorative and electrical properties.

Krause, L.J.

1982-09-20T23:59:59.000Z

133

Electroless metal plating of plastics  

DOE Patents [OSTI]

Process for plating main group metals on aromatic polymers is carried out by the use of a nonaqueous solution of a salt of an alkali metal in a positive valence state and a main group metal in a negative valence state with contact between the solution and polymer providing a redox reaction causing the deposition of the main group metal and the reduction of the polymer. Products from the process exhibit useful decorative and electrical properties.

Krause, Lawrence J. (Chicago, IL)

1984-01-01T23:59:59.000Z

134

EIS-0276: Rocky Flats Plutonium Storage, Golden, Colorado  

Broader source: Energy.gov [DOE]

This EIS analyzes DOE's proposed action to provide safe interim storage of approximately 10 metric tons of plutonium at the Rocky Flats Environmental Technology Site (RFETS).

135

2006 Annual Ecology Report for the Rocky Flats Site  

Office of Legacy Management (LM)

Ecology Report for the Rocky Flats Site Click on the links below to access different portions of the electronic annual report. 2006 Annual Report Sections Diffuse Knapweed...

136

Preliminary Notice of Violation , Rocky Flats Environmental Technology...  

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

deficiencies associated two events in March and April 1996 that resulted in the spread of contamination and personnel uptakes of radioactive material at the Rocky Flats...

137

Separator plate for a fuel cell  

DOE Patents [OSTI]

A separator plate is described for a fuel cell comprising an anode current collector, a cathode current collector and a main plate, the main plate disposed between the anode current collector and the cathode current collector. The anode current collector forms a flattened peripheral wet seal structure and manifold wet seal structure on the anode side of the separator plate and the cathode current collector forms a flattened peripheral wet seal structure and manifold wet seal structure on the cathode side of the separator plate. In this manner, the number of components required to manufacture and assemble a fuel cell stack is reduced. 9 figs.

Petri, R.J.; Meek, J.; Bachta, R.P.; Marianowski, L.G.

1996-04-02T23:59:59.000Z

138

Separator plate for a fuel cell  

DOE Patents [OSTI]

A separator plate for a fuel cell comprising an anode current collector, a cathode current collector and a main plate, the main plate disposed between the anode current collector and the cathode current collector. The anode current collector forms a flattened peripheral wet seal structure and manifold wet seal structure on the anode side of the separator plate and the cathode current collector forms a flattened peripheral wet seal structure and manifold wet seal structure on the cathode side of the separator plate. In this manner, the number of components required to manufacture and assemble a fuel cell stack is reduced.

Petri, Randy J. (Crete, IL); Meek, John (Downers Grove, IL); Bachta, Robert P. (Chicago, IL); Marianowski, Leonard G. (Mount Prospect, IL)

1996-01-01T23:59:59.000Z

139

INVENTORY FOR ELGAR COURT FLAT NO. BLOCK NO. ROOM NO.  

E-Print Network [OSTI]

INVENTORY FOR ELGAR COURT FLAT NO. BLOCK NO. ROOM NO. Staff on the Vale Village try to ensure and cleaned to a high standard. Please make sure that you complete this inventory and note down anything which seat x 1 Toilet roll holder x 1 INVENTORY FOR SHACKLETON FLAT NO: BLOCK NO: ROOM NO: NAME: TELEPHONE

Birmingham, University of

140

INVENTORY FOR ELGAR COURT FLAT NO. BLOCK NO. ROOM NO.  

E-Print Network [OSTI]

INVENTORY FOR ELGAR COURT FLAT NO. BLOCK NO. ROOM NO. Staff on the Vale Village try to ensure and cleaned to a high standard. Please make sure that you complete this inventory and note down anything which Toilet seat x 1 Toilet roll holder x 1 INVENTORY FOR MASON FLAT NO: BLOCK NO: ROOM NO: NAME: TELEPHONE

Birmingham, University of

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


141

INVENTORY FOR ELGAR COURT FLAT NO. BLOCK NO. ROOM NO.  

E-Print Network [OSTI]

INVENTORY FOR ELGAR COURT FLAT NO. BLOCK NO. ROOM NO. Staff on the Vale Village try to ensure and cleaned to a high standard. Please make sure that you complete this inventory and note down anything which holder x 1 INVENTORY FOR TENNIS COURT BLOCK NO: FLAT NO: ROOM NO: NAME: TELEPHONE EXT. NO: #12;How

Birmingham, University of

142

INVENTORY FOR ELGAR COURT FLAT NO. BLOCK NO. ROOM NO.  

E-Print Network [OSTI]

INVENTORY FOR ELGAR COURT FLAT NO. BLOCK NO. ROOM NO. Staff on the Vale Village try to ensure and cleaned to a high standard. Please make sure that you complete this inventory and note down anything which Toilet seat x 1 Toilet roll holder x 1 INVENTORY FOR ELGAR COURT FLAT NO: BLOCK NO: ROOM NO: NAME

Birmingham, University of

143

INVENTORY FOR ELGAR COURT FLAT NO. BLOCK NO. ROOM NO.  

E-Print Network [OSTI]

INVENTORY FOR ELGAR COURT FLAT NO. BLOCK NO. ROOM NO. Staff on the Vale Village try to ensure and cleaned to a high standard. Please make sure that you complete this inventory and note down anything which rail x 1 INVENTORY FOR MAPLE BANK FLAT NO: BLOCK NO: ROOM NO: NAME: TELEPHONE EXT. NO: #12;How

Birmingham, University of

144

Commercial Decommissioning at DOE's Rocky Flats  

SciTech Connect (OSTI)

Due in large part to the number of nuclear facilities that make up the DOE complex, DOE-EM work has historically been paperwork intensive and driven by extensive regulations. Requirements for non-nuclear facilities are often grouped with those of nuclear facilities, driving up costs. Kaiser-Hill was interested in applying a commercial model to demolition of these facilities and wanted to apply necessary and sufficient standards to the work activities, but avoid applying unnecessary requirements. Faced with demolishing hundreds of uncontaminated or non-radiologically contaminated facilities, Kaiser-Hill has developed a subcontracting strategy to drastically reduce the cost of demolishing these facilities at Rocky Flats. Aiming to tailor the demolition approach of such facilities to more closely follow commercial practices, Kaiser-Hill recently released a Request for Proposals (RFP) for the demolition of the site's former central administration facility. The RFP significantly reduced requirements for compliance with specific DOE directives. Instead, the RFP required subcontractors to comply with health and safety requirements commonly found in the demolition of similar facilities in a commercial setting. This resulted in a number of bids from companies who have normally not bid on DOE work previously and at a reduced cost over previous approaches. This paper will discuss the details of this subcontracting strategy.

Freiboth, C.; Sandlin, N.; Schubert, A.; Hansen, S.

2002-02-25T23:59:59.000Z

145

The Critical Mass Laboratory at Rocky Flats  

SciTech Connect (OSTI)

The Critical Mass Laboratory (CML) at Rocky Flats northwest of Denver, Colorado, was built in 1964 and commissioned to conduct nuclear experiments on January 28, 1965. It was built to attain more accurate and precise experimental data to ensure nuclear criticality safety at the plant than were previously possible. Prior to its construction, safety data were obtained from long extrapolations of subcritical data (called in situ experiments), calculated parameters from reactor engineering 'models', and a few other imprecise methods. About 1700 critical and critical-approach experiments involving several chemical forms of enriched uranium and plutonium were performed between then and 1988. These experiments included single units and arrays of fissile materials, reflected and 'bare' systems, and configurations with various degrees of moderation, as well as some containing strong neutron absorbers. In 1989, a raid by the Federal Bureau of Investigation (FBI) caused the plant as a whole to focus on 'resumption' instead of further criticality safety experiments. Though either not recognized or not admitted for a few years, that FBI raid did sound the death knell for the CML. The plant's optimistic goal of resumption evolved to one of deactivation, decommissioning, and plantwide demolition during the 1990s. The once-proud CML facility was finally demolished in April of 2002.

Rothe, Robert E

2003-10-15T23:59:59.000Z

146

Rapidly Moving Divertor Plates In A Tokamak  

SciTech Connect (OSTI)

It may be possible to replace conventional actively cooled tokamak divertor plates with a set of rapidly moving, passively cooled divertor plates on rails. These plates would absorb the plasma heat flux with their thermal inertia for ~10-30 sec, and would then be removed from the vessel for processing. When outside the tokamak, these plates could be cooled, cleaned, recoated, inspected, and then returned to the vessel in an automated loop. This scheme could provide nearoptimal divertor surfaces at all times, and avoid the need to stop machine operation for repair of damaged or eroded plates. We describe various possible divertor plate designs and access geometries, and discuss an initial design for a movable and removable divertor module for NSTX-U.

S. Zweben

2011-05-16T23:59:59.000Z

147

A quantum kinematics for asymptotically flat spacetimes  

E-Print Network [OSTI]

We construct a quantum kinematics for asymptotically flat spacetimes based on the Koslowski-Sahlmann (KS) representation. The KS representation is a generalization of the representation underlying Loop Quantum Gravity (LQG) which supports, in addition to the usual LQG operators, the action of `background exponential operators' which are connection dependent operators labelled by `background' $su(2)$ electric fields. KS states have, in addition to the LQG state label corresponding to 1 dimensional excitations of the triad, a label corresponding to a `background' electric field which describes 3 dimensional excitations of the triad. Asymptotic behaviour in quantum theory is controlled through asymptotic conditions on the background electric fields which label the {\\em states} and the background electric fields which label the {\\em operators}. Asymptotic conditions on the triad are imposed as conditions on the background electric field state label while confining the LQG spin net graph labels to compact sets. We show that KS states can be realised as wave functions on a quantum configuration space of generalized connections and that the asymptotic behaviour of each such generalized connection is determined by that of the background electric fields which label the background exponential operators. Similar to the spatially compact case, the Gauss Law and diffeomorphism constraints are then imposed through Group Averaging techniques to obtain a large sector of gauge invariant states. It is shown that this sector supports a unitary action of the group of asymptotic rotations and translations and that, as anticipated by Friedman and Sorkin, for appropriate spatial topology, this sector contains states which display fermionic behaviour under $2\\pi$ rotations.

Miguel Campiglia; Madhavan Varadarajan

2014-12-17T23:59:59.000Z

148

Zirconium Plate Measuring Instrument (ZPMI) Design Report  

SciTech Connect (OSTI)

This report describes the design of a device intended to measure radiation-induced strain in zirconium plate specimens as a function of neutron fluence.

K. Davies; J. H. Jackson

2013-10-01T23:59:59.000Z

149

Fuel cell cooler-humidifier plate  

DOE Patents [OSTI]

A cooler-humidifier plate for use in a proton exchange membrane (PEM) fuel cell stack assembly is provided. The cooler-humidifier plate combines functions of cooling and humidification within the fuel cell stack assembly, thereby providing a more compact structure, simpler manifolding, and reduced reject heat from the fuel cell. Coolant on the cooler side of the plate removes heat generated within the fuel cell assembly. Heat is also removed by the humidifier side of the plate for use in evaporating the humidification water. On the humidifier side of the plate, evaporating water humidifies reactant gas flowing over a moistened wick. After exiting the humidifier side of the plate, humidified reactant gas provides needed moisture to the proton exchange membranes used in the fuel cell stack assembly. The invention also provides a fuel cell plate that maximizes structural support within the fuel cell by ensuring that the ribs that form the boundaries of channels on one side of the plate have ends at locations that substantially correspond to the locations of ribs on the opposite side of the plate.

Vitale, Nicholas G. (Albany, NY); Jones, Daniel O. (Glenville, NY)

2000-01-01T23:59:59.000Z

150

Broadband asymmetric acoustic transmission by a plate with quasi-periodic surface ridges  

SciTech Connect (OSTI)

In this paper, an acoustic system with broadband asymmetric transmission is designed and fabricated, which consists of a water-immersed aluminum plate engraved with quasi-periodically-patterned ridges on single surface. It demonstrates that when the acoustic waves are launched into the system from the structured side, they can couple into the Lamb modes in the plate efficiently and attain a high transmission; on the contrary, when the waves are incident from the opposite flat side, the coupling is weak, and the transmission is low. Superior to systems with periodic patterning, this quasi-periodically-patterned system has a broad working frequency range due to the collective contributions from the multiple diffractions specific to the structure.

Li, Chunhui; Ke, Manzhu, E-mail: mzke@whu.edu.cn; Ye, Yangtao; Xu, Shengjun; Qiu, Chunyin; Liu, Zhengyou [Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072 (China)

2014-07-14T23:59:59.000Z

151

Flexture plate motion-transfer mechanism, beam-splitter assembly, and interferometer incorporating the same  

DOE Patents [OSTI]

A multiplicity of one-piece flexure plates are assembled in pairs to provide a support system on which a retroreflector may be mounted for reciprocal motion. Combined with balance bodies, the flexure plates provide a support system having portions that are dynamically and statically balanced with one another, irrespective of orientation, so as to thereby immunize the unit against extraneous forces. The motion transfer assembly is especially adapted for use to support a moving retroreflector in a two-arm interferometer that may further include a beamsplitter assembly constructed from a one-piece, integrally formed body, the body having convergent, optically flat planar surfaces of specular reflectance, and means for adjustably mounting a beamsplitter therein. The spectrometer is of modular construction, and employs an integrated clocking sub-assembly as well as a light-weight voice-coil motor. 15 figs.

Carangelo, R.M.; Dettori, M.D.; Grigely, L.J.; Murray, T.C.; Solomon, P.R.; Dine, C.P. Van; Wright, D.D.

1996-01-23T23:59:59.000Z

152

Flexture plate motion-transfer mechanism, beam-splitter assembly, and interferometer incorporating the same  

DOE Patents [OSTI]

A multiplicity of one-piece flexure plates are assembled in pairs to provide a support system on which a retroreflector may be mounted for reciprocal motion. Combined with balance bodies, the flexure plates provide a support system having portions that are dynamically and statically balanced with one another, irrespective of orientation, so as to thereby immunize the unit against extraneous forces. The motion transfer assembly is especially adapted for use to support a moving retroreflector in a two-arm interferometer that may further include a beamsplitter assembly constructed from a one-piece, integrally formed body, the body having convergent, optically flat planar surfaces of specular reflectance, and means for adjustably mounting a beamsplitter therein. The spectrometer is of modular construction, and employs an integrated clocking sub-assembly as well as a light-weight voice-coil motor.

Carangelo, Robert M. (Glastonbury, CT); Dettori, Mark D. (Farmington, CT); Grigely, Lawrence J. (South Windsor, CT); Murray, Terence C. (Winchester, MA); Solomon, Peter R. (West Hartford, CT); Van Dine, C. Peter (Bolton, CT); Wright, David D. (Vershire, VT)

1996-01-01T23:59:59.000Z

153

Natural convection heat transfer from a plate in a semicircular enclosure  

SciTech Connect (OSTI)

The present paper is about characterizing the two-dimensional convective transfer across the air-filled region between a flat plate and a semicircular cylindrical enclosure. In the subject geometry, a long thin plate at uniform temperature is contained coaxially and symmetrically in a long semicircular trough closed at the top and having a uniform but different temperature. Heat flows across the air-filled region between the two by both natural convection and gaseous conduction. The problem of characterizing the free convective component of this heat transfer - that is, the component caused by bulk fluid motion - is treated experimentally by using a heat balance technique, with the measurements being repeated at different pressures, in order to cover a wide Rayleigh number range, from Ra {approximately} 10 to Ra {approximately} 10{sup 8}. Nusselt number versus Rayleigh number plots are presented for each of several combinations of plate-to-trough spacing and tilt angle, and the plots are correlated by equations. The problem of characterizing the conductive component is treated by numerically solving the steady diffusion equation in the air-filled region, and the results are correlated as a function of the spacing and the plate thickness.

Moore, G.A.; Hollands, K.G.T. (Univ. of Waterloo, Ontario (Canada))

1992-02-01T23:59:59.000Z

154

AGU Monograph, Plate Boundary Zones, in press. Page 1 Crustal Block Rotations and Plate Coupling  

E-Print Network [OSTI]

AGU Monograph, Plate Boundary Zones, in press. Page 1 Crustal Block Rotations and Plate Coupling that considering both block rotations and fault locking significantly improves the fit to the data over models by locking on #12;AGU Monograph, Plate Boundary Zones, in press. Page 2 block-bounding faults and apply

McCaffrey, Robert

155

Left invertibility, flatness and identifiability of switched linear dynamical systems: a framework  

E-Print Network [OSTI]

Left invertibility, flatness and identifiability of switched linear dynamical systems: a framework invertibility and flatness, dynamical systems are structurally equivalent to some specific cryptographic invertibility, flatness and identifiability of discrete- time switched linear systems are investigated

Paris-Sud XI, Université de

156

Climatically Diverse Data Set for Flat-Plate PV Module Model Validations (Presentation), NREL (National Renewable Energy Laboratory)  

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 Proposed New SubstationClean Communities of WesternVail GlobalPROGRAM

157

Whole Earth Structure and Plate Tectonics  

E-Print Network [OSTI]

Whole Earth Structure and Plate Tectonics Earth Structure (2nd Edition), 2004 W.W. Norton & Co, New York Slide show by Ben van der Pluijm © WW Norton; unless noted otherwise #12;© EarthStructure (2nd ed evolution of Earth: from continental drift (early 1900's) to sea-floor spreading (early 1960's) to plate

158

Fuel Cell Stack Components BipolarPlate  

E-Print Network [OSTI]

Fuel Cell Stack Components Fuel Processor BipolarPlate Cathode+ Anode- Electrolyte H+ H+ HYDROGEN · Low-Platinum and Platinum-Free Catalysts for Oxygen Reduction at PEM Fuel Cell Cathodes · Low-Platinum-Loading Catalysts for Fuel Cells · Scale-Up of Carbon/Carbon Composite Bipolar Plates #12;Stack Component Projects

159

atomically flat gold: Topics by E-print Network  

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

Flat(Tire1) Intact(Tire1) StartFinish Inflate(Tire1 Starner, Thad E. 147 Local and global instabilities in nanosize rectangular prismatic gold specimens R.C. Batra *, A.A....

160

Seismic rehabilitation of a reinforced concrete flat-slab structure  

E-Print Network [OSTI]

The effectiveness of seismic rehabilitation techniques used to eliminate punching shear failures was assessed for flat-slab structural systems. This type of retrofit was evaluated for a four-story reinforced concrete (RC) frame office building...

Jimenez, Laila Margarita

1999-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


161

Modified Ricci flow and asymptotically non-flat spaces  

E-Print Network [OSTI]

The present work extends the application of a modified Ricci flow equation to an asymptotically non flat space, namely Marder's cylindrially symmetric space. It is found that the flow equation has a solution at least in a particular case.

Shubhayu Chatterjee; Narayan Banerjee

2013-04-08T23:59:59.000Z

162

Interacting holographic dark energy model in non-flat universe  

E-Print Network [OSTI]

We employ the holographic model of interacting dark energy to obtain the equation of state for the holographic energy density in non-flat (closed) universe enclosed by the event horizon measured from the sphere of horizon named $L$.

M R Setare

2006-10-14T23:59:59.000Z

163

DOE's Former Rocky Flats Weapons Production Site to Become National...  

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

Flats nuclear weapons production site to the Department of the Interior's (DOI) U.S. Fish and Wildlife Service (FWS) for use as a National Wildlife Refuge. After more than a...

164

The Redshift Distribution of Flat-Spectrum Radio Sources  

E-Print Network [OSTI]

The redshift distribution of flat-spectrum radio sources with 5 GHz flux densities S>5 mJy is a key component in using current radio lens surveys to probe the cosmological model. We have constructed the first flat-spectrum radio sample in the flux density range 3-20 mJy. Our new sample has 33 sources; we have determined the redshifts of 14 of these (42% complete). The low mean redshift, ~0.75, of our faintest sample needs to be confirmed by further observations to improve the sample completeness. We also increased the redshift completeness of several surveys of brighter flat-spectrum sources. While the mean redshift, ~1.1 of flat-spectrum samples fainter than 1 Jy is nearly constant, the fraction of the sources identifiable as quasars steadily drops from ~80% to ~10% as the flux density of the sources decreases.

J. A. Munoz; E. E. Falco; C. S. Kochanek; J. Lehar; E. Mediavilla

2003-05-20T23:59:59.000Z

165

Shock wave absorber having apertured plate  

DOE Patents [OSTI]

The shock or energy absorber disclosed herein utilizes an apertured plate maintained under the normal level of liquid flowing in a piping system and disposed between the normal liquid flow path and a cavity pressurized with a compressible gas. The degree of openness (or porosity) of the plate is between 0.01 and 0.60. The energy level of a shock wave travelling down the piping system thus is dissipated by some of the liquid being jetted through the apertured plate toward the cavity. The cavity is large compared to the quantity of liquid jetted through the apertured plate, so there is little change in its volume. The porosity of the apertured plate influences the percentage of energy absorbed.

Shin, Yong W. (Western Springs, IL); Wiedermann, Arne H. (Chicago Heights, IL); Ockert, Carl E. (Vienna, VA)

1985-01-01T23:59:59.000Z

166

Shock wave absorber having apertured plate  

DOE Patents [OSTI]

The shock or energy absorber disclosed herein utilizes an apertured plate maintained under the normal level of liquid flowing in a piping system and disposed between the normal liquid flow path and a cavity pressurized with a compressible gas. The degree of openness (or porosity) of the plate is between 0.01 and 0.60. The energy level of a shock wave travelling down the piping system thus is dissipated by some of the liquid being jetted through the apertured plate toward the cavity. The cavity is large compared to the quantity of liquid jetted through the apertured plate, so there is little change in its volume. The porosity of the apertured plate influences the percentage of energy absorbed.

Shin, Y.W.; Wiedermann, A.H.; Ockert, C.E.

1983-08-26T23:59:59.000Z

167

Undrained behavior of plate anchors subjected to general loading  

E-Print Network [OSTI]

This study presents a method for predicting the undrained behavior of plate anchors, including out-of-plane loading of simple plates and performance of suction embedded plate anchors (SEPLA). Three dimensional finite element models are used...

Yang, Ming

2010-01-14T23:59:59.000Z

168

Flattening Scientific CCD Imaging Data with a Dome Flat Field System  

E-Print Network [OSTI]

We describe the flattening of scientific CCD imaging data using a dome flat field system. The system uses light emitting diodes (LEDs) to illuminate a carefully constructed dome flat field screen. LEDs have several advantages over more traditional illumination sources: they are available in a wide range of output wavelengths, are inexpensive, have a very long source lifetime, and are straightforward to control digitally. The circular dome screen is made of a material with Lambertian scattering properties that efficiently reflects light of a wide range of wavelengths and incident angles. We compare flat fields obtained using this new system with two types of traditionally-constructed flat fields: twilight sky flats and nighttime sky flats. Using photometric standard stars as illumination sources, we test the quality of each flat field by applying it to a set of standard star observations. We find that the dome flat field system produces flat fields that are superior to twilight or nighttime sky flats, particularly for photometric calibration. We note that a ratio of the twilight sky flat to the nighttime sky flat is flat to within the expected uncertainty; but since both of these flat fields are inferior to the dome flat, this common test is not an appropriate metric for testing a flat field. Rather, the only feasible and correct method for determining the appropriateness of a flat field is to use standard stars to measure the reproducibility of known magnitudes across the detector.

J. L. Marshall; D. L. DePoy

2005-10-07T23:59:59.000Z

169

automatic license plate readers: Topics by E-print Network  

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

to causalism, building on Frankfurts concept of guidance. Ezio Di Nucci 151 Lesson 3. Plate Tectonics Overview Geosciences Websites Summary: Lesson 3. Plate Tectonics...

170

Plate subrotations Marco Cuffaro,1,2  

E-Print Network [OSTI]

to compute relative motion of two plates not sharing a margin. [3] Relative motions are important contemporaneous rotation about its axis, or as a car that starts swinging while traveling. [8] In this paper, we

Doglioni, Carlo

171

Characterization of Tri-lab Tantalum Plate.  

SciTech Connect (OSTI)

This report provides a detailed characterization Tri-lab Tantalum (Ta) plate jointly purchased from HCStark Inc. by Sandia, Los Alamos and Lawrence Livermore National Laboratories. Data in this report was compiled from series of material and properties characterization experiments carried out at Sandia (SNL) and Los Alamos (LANL) Laboratories through a leveraged effort funded by the C2 campaign. Results include microstructure characterization detailing the crystallographic texture of the material and an increase in grain size near the end of the rolled plate. Mechanical properties evaluations include, compression cylinder, sub-scale tension specimen, micohardness and instrumented indentation testing. The plate was found to have vastly superior uniformity when compare with previously characterized wrought Ta material. Small but measurable variations in microstructure and properties were noted at the end, and at the top and bottom edges of the plate.

Buchheit, Thomas E.; Cerreta, Ellen K.; Deibler, Lisa Anne; Chen, Shu-Rong; Michael, Joseph R.

2014-09-01T23:59:59.000Z

172

Composite bipolar plate for electrochemical cells  

DOE Patents [OSTI]

A bipolar separator plate for fuel cells consists of a molded mixture of a vinyl ester resin and graphite powder. The plate serves as a current collector and may contain fluid flow fields for the distribution of reactant gases. The material is inexpensive, electrically conductive, lightweight, strong, corrosion resistant, easily mass produced, and relatively impermeable to hydrogen gas. The addition of certain fiber reinforcements and other additives can improve the properties of the composite material without significantly increasing its overall cost.

Wilson, Mahlon S. (Los Alamos, NM); Busick, Deanna N. (Los Alamos, NM)

2001-01-01T23:59:59.000Z

173

The analysis of orthogonally stiffened plates  

E-Print Network [OSTI]

THE ANALTSIS OP ORTHOGONALLY STIPPENED PLATES A Thesis By VIRGIL O'HEAL BBNNBTT, JR. Submitted to the Graduate College of the Texas A&M University in partial fulfi. llment of the requirements for the degree of MASTER OP SCIENCB Msy 1966... Major Subject. "Aerospace Engineering THE ANALYSIS OF ORTHOGONALLY BTIFFBNED PLATES A Thesis By VIRGIL O'NBAL BBNNETT, JR. Approved as to style and content by: (Chai. n Committee) (Head of Department) (Ne er) (Member ) Hsy 1966 ACKNOWLEICMENTS...

Bennett, Virgil O'Neal

2012-06-07T23:59:59.000Z

174

Lighting system with heat distribution face plate  

DOE Patents [OSTI]

Lighting systems having a light source and a thermal management system are provided. The thermal management system includes synthetic jet devices, a heat sink and a heat distribution face plate. The synthetic jet devices are arranged in parallel to one and other and are configured to actively cool the lighting system. The heat distribution face plate is configured to radially transfer heat from the light source into the ambient air.

Arik, Mehmet; Weaver, Stanton Earl; Stecher, Thomas Elliot; Kuenzler, Glenn Howard; Wolfe, Jr., Charles Franklin; Li, Ri

2013-09-10T23:59:59.000Z

175

Corrosion test cell for bipolar plates  

DOE Patents [OSTI]

A corrosion test cell for evaluating corrosion resistance in fuel cell bipolar plates is described. The cell has a transparent or translucent cell body having a pair of identical cell body members that seal against opposite sides of a bipolar plate. The cell includes an anode chamber and an cathode chamber, each on opposite sides of the plate. Each chamber contains a pair of mesh platinum current collectors and a catalyst layer pressed between current collectors and the plate. Each chamber is filled with an electrolyte solution that is replenished with fluid from a much larger electrolyte reservoir. The cell includes gas inlets to each chamber for hydrogen gas and air. As the gases flow into a chamber, they pass along the platinum mesh, through the catalyst layer, and to the bipolar plate. The gas exits the chamber through passageways that provide fluid communication between the anode and cathode chambers and the reservoir, and exits the test cell through an exit port in the reservoir. The flow of gas into the cell produces a constant flow of fresh electrolyte into each chamber. Openings in each cell body is member allow electrodes to enter the cell body and contact the electrolyte in the reservoir therein. During operation, while hydrogen gas is passed into one chamber and air into the other chamber, the cell resistance is measured, which is used to evaluate the corrosion properties of the bipolar plate.

Weisbrod, Kirk R. (Los Alamos, NM)

2002-01-01T23:59:59.000Z

176

Relativistic electromagnetic flat top solitons and their stability  

SciTech Connect (OSTI)

The inclusion of ion response in the study of relativistically intense electromagnetic laser pulse propagation in plasma yields certain distinct varieties of single peak solitonic structures. A flat top slow moving structure (for which the various fields have a flat profile over a wide spatial range) is one such solution. A detailed characterization of these solutions along with the eigen spectrum of their formation in the parameter space has been presented. The evolution of this particular solution is studied in detail with the help of a coupled fluid Maxwell set of equations. The study shows that the flat top solution is unstable. The instability is characterized as the backward Brillouin instability for which the electron quiver velocity plays the role of the effective temperature.

Sundar, Sita; Das, Amita; Saxena, Vikrant; Kaw, Predhiman; Sen, Abhijit [Institute for Plasma Research, Bhat, Gandhinagar-382428 (India)

2011-11-15T23:59:59.000Z

177

A new refined theory of plates with transverse shear deformation for moderately thick and thick plates  

E-Print Network [OSTI]

In this paper we propose a new refined shear deformation plate theory which possesses a series of desirable features, the most salient of which are as follows: (i) The loads, which are generally considered to be applied on the middle surface of the plate, act on the upper surface of the plate; (ii) The equations are applicable to the calculation of the stresses in isotropic plates and provide the same order of accuracy as several theories with second order shear deformation effects; (iii) It constitutes a theory, in the sense defined by Love, since it gives easy expressions for application to problems in different fields in architecture and civil engineering

Valle, Jose Miguel Martinez

2015-01-01T23:59:59.000Z

178

Superintegrability in a non-conformally-flat space  

E-Print Network [OSTI]

Superintegrable systems in two- and three-dimensional spaces of constant curvature have been extensively studied. From these, superintegrable systems in conformally flat spaces can be constructed by Staeckel transform. In this paper a method developed to establish the superintegrability of the Tremblay-Turbiner-Winternitz system in two dimensions is extended to higher dimensions and a superintegrable system on a non-conformally-flat four-dimensional space is found. In doing so, curvature corrections to the corresponding classical potential are found to be necessary. It is found that some subalgebras of the symmetry algebra close polynomially.

E. G. Kalnins; J. M. Kress; W. Miller Jr

2012-11-07T23:59:59.000Z

179

Interacting agegraphic dark energy models in non-flat universe  

E-Print Network [OSTI]

A so-called "agegraphic dark energy" was recently proposed to explain the dark energy-dominated universe. In this Letter, we generalize the agegraphic dark energy models to the universe with spatial curvature in the presence of interaction between dark matter and dark energy. We show that these models can accommodate $w_D = -1 $ crossing for the equation of state of dark energy. In the limiting case of a flat universe, i.e. $k = 0$, all previous results of agegraphic dark energy in flat universe are restored.

Ahmad Sheykhi

2009-09-12T23:59:59.000Z

180

Denaturing Urea PAGE -Large Gel Preparation of Glass Plates  

E-Print Network [OSTI]

for short glass plate. Wear gloves. 3. Place long glass plate on 2 foam rectangles. Set up spacers and short32 Denaturing Urea PAGE - Large Gel Preparation of Glass Plates 1. Clean glass plates and comb pipette, add 5 drops of dichlorodimethylsilane (Aldrich D6,082-6) to 5 mls of acetone in diposable glass

Aris, John P.

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


181

Rocky Flats Cleanup Agreement implementation successes and challenges  

SciTech Connect (OSTI)

On July 19, 1996 the US Department of Energy (DOE), State of Colorado (CDPHE), and US Environmental Protection Agency (EPA) entered into an agreement called the Rocky Flats Cleanup Agreement (RFCA) for the cleanup and closure of the Rocky Flats Environmental Technology Site (RFETS or Rocky Flats). Major elements of the agreement include: an Integrated Site-Wide Baseline; up to twelve significant enforceable milestones per year; agreed upon soil and water action levels and standards for cleanup; open space as the likely foreseeable land use; the plutonium and TRU waste removed by 2015; streamlined regulatory process; agreement with the Defense Nuclear Facilities Safety Board (DNFSB) to coordinate activities; and a risk reduction focus. Successful implementation of RFCA requires a substantial effort by the parties to change their way of thinking about RFETS and meet the deliverables and commitments. Substantial progress toward Site closure through the implementation of RFCA has been accomplished in the short time since the signing, yet much remains to be done. Much can be learned from the Rocky Flats experience by other facilities in similar situations.

Shelton, D.C.

1997-02-01T23:59:59.000Z

182

Avoidance of a Landau pole by flat contributions in QED  

SciTech Connect (OSTI)

We consider massless Quantum Electrodynamics in the momentum scheme and carry forward an approach based on Dyson–Schwinger equations to approximate both the ?-function and the renormalized photon self-energy (Yeats, 2011). Starting from the Callan–Symanzik equation, we derive a renormalization group (RG) recursion identity which implies a non-linear ODE for the anomalous dimension and extract a sufficient but not necessary criterion for the existence of a Landau pole. This criterion implies a necessary condition for QED to have no such pole. Solving the differential equation exactly for a toy model case, we integrate the corresponding RG equation for the running coupling and find that even though the ?-function entails a Landau pole it exhibits a flat contribution capable of decreasing its growth, in other cases possibly to the extent that such a pole is avoided altogether. Finally, by applying the recursion identity, we compute the photon propagator and investigate the effect of flat contributions on both spacelike and timelike photons. -- Highlights: •We present an approach to approximate both the ?-function and the photon self-energy. •We find a sufficient criterion for the self-energy to entail the existence of a Landau pole. •We study non-perturbative ‘flat’ contributions that emerge within the context of our approach. •We discuss a toy model and how it is affected by flat contributions.

Klaczynski, Lutz, E-mail: lutz.klaczynski@gmx.de [Department of Physics, Humboldt University Berlin, 12489 Berlin (Germany); Kreimer, Dirk, E-mail: kreimer@mathematik.hu-berlin.de [Alexander von Humboldt Chair in Mathematical Physics, Humboldt University, Berlin 12489 (Germany)

2014-05-15T23:59:59.000Z

183

Flatness of heavy chain systems Nicolas Petit 1  

E-Print Network [OSTI]

.e. trolleys carrying a fixed length heavy chain that may carry a load, is addressed in the partial derivatives the homogeneous chain carrying a load, see equation (13). In [11] the flatness [3, 4] of heavy chain systems, i dimensional case. Under small angle approximations, these heavy chain systems are described by a 1D partial

184

NATURAL HERITAGE RESOURCES OF THE ROCKY FLATS ENVIRONMENTAL TECHNOLOGY SITE  

E-Print Network [OSTI]

NATURAL HERITAGE RESOURCES OF THE ROCKY FLATS ENVIRONMENTAL TECHNOLOGY SITE AND THEIR CONSERVATION. Dr. Fred Harrington, Dr. Mark Bakeman, and Alison Deans of the Pawnee Natural History Society Environmental Technology Site (RFETS). The exclusion of the general public over the last 20 to 40 years has

185

Control of an industrial polymerization reactor using flatness *, P. Rouchona  

E-Print Network [OSTI]

Control of an industrial polymerization reactor using flatness N. Petita, *, P. Rouchona , J the system under consideration is the lar- gest propylene polymerization plant in the world [15]. Originally and with precision to optimize profit. This critical issue arises in different polymerization processes, see

186

No Open or Flat Bouncing Cosmologies in Einstein Gravity  

E-Print Network [OSTI]

We show that bouncing open or flat Friedmann-Robertson-Walker cosmologies are inconsistent with worldsheet string theory to first approximation. Specifically, the Virasoro constraint translates to the null energy condition in spacetime at leading order in the alpha-prime expansion. Thus one must go beyond minimally-coupled Einstein gravity in order to find bounce solutions.

Parikh, Maulik K

2015-01-01T23:59:59.000Z

187

Interacting generalized Chaplygin gas model in non-flat universe  

E-Print Network [OSTI]

We employ the generalized Chaplygin gas of interacting dark energy to obtain the equation of state for the generalized Chaplygin gas energy density in non-flat universe. By choosing a negative value for $B$ we see that $w_{\\rm \\Lambda}^{eff}< -1$, that corresponds to a universe dominated by phantom dark energy.

M R Setare

2007-11-04T23:59:59.000Z

188

Differentially Flat Trajectory Generation for a Dynamically Stable Mobile Robot  

E-Print Network [OSTI]

for the ballbot, a dynamically stable mobile robot which balances on a single spherical wheel. To this end, assumptions are made to form the system as differentially flat, and a method of deriving feasible trajectories, dynamically stable mobile robot. It is a human-sized robot that balances on a single spherical wheel

189

Mini-Course ECC'97, Brussels 8 FLAT SYSTEMS  

E-Print Network [OSTI]

Mini-Course ECC'97, Brussels 8 FLAT SYSTEMS Ph. Martin R.M. Murray P. Rouchon Centre Automatique et Syst`emes, ´Ecole des Mines de Paris, 35 rue Saint-Honor´e, 77305 Fontainebleau, FRANCE. [martin. murray@indra.caltech.edu. Introduction Control systems are ubiquitous in modern technology. The use

Paris-Sud XI, Université de

190

Recovery process for electroless plating baths  

DOE Patents [OSTI]

A process for removing, from spent electroless metal plating bath solutions, accumulated byproducts and counter-ions that have deleterious effects on plating. The solution, or a portion thereof, is passed through a selected cation exchange resin bed in hydrogen form, the resin selected from strong acid cation exchangers and combinations of intermediate acid cation exchangers with strong acid cation exchangers. Sodium and nickel ions are sorbed in the selected cation exchanger, with little removal of other constituents. The remaining solution is subjected to sulfate removal through precipitation of calcium sulfate hemihydrate using, sequentially, CaO and then CaCO.sub.3. Phosphite removal from the solution is accomplished by the addition of MgO to form magnesium phosphite trihydrate. The washed precipitates of these steps can be safely discarded in nontoxic land fills, or used in various chemical industries. Finally, any remaining solution can be concentrated, adjusted for pH, and be ready for reuse. The plating metal can be removed from the exchanger with sulfuric acid or with the filtrate from the magnesium phosphite precipitation forming a sulfate of the plating metal for reuse. The process is illustrated as applied to processing electroless nickel plating baths.

Anderson, Roger W. (Farragut, TN); Neff, Wayne A. (Knoxville, TN)

1992-01-01T23:59:59.000Z

191

Recovery process for electroless plating baths  

DOE Patents [OSTI]

A process is described for removing, from spent electroless metal plating bath solutions, accumulated byproducts and counter-ions that have deleterious effects on plating. The solution, or a portion thereof, is passed through a selected cation exchange resin bed in hydrogen form, the resin selected from strong acid cation exchangers and combinations of intermediate acid cation exchangers with strong acid cation exchangers. Sodium and nickel ions are sorbed in the selected cation exchanger, with little removal of other constituents. The remaining solution is subjected to sulfate removal through precipitation of calcium sulfate hemihydrate using, sequentially, CaO and then CaCO[sub 3]. Phosphite removal from the solution is accomplished by the addition of MgO to form magnesium phosphite trihydrate. The washed precipitates of these steps can be safely discarded in nontoxic land fills, or used in various chemical industries. Finally, any remaining solution can be concentrated, adjusted for pH, and be ready for reuse. The plating metal can be removed from the exchanger with sulfuric acid or with the filtrate from the magnesium phosphite precipitation forming a sulfate of the plating metal for reuse. The process is illustrated as applied to processing electroless nickel plating baths. 18 figs.

Anderson, R.W.; Neff, W.A.

1992-05-12T23:59:59.000Z

192

Highly conductive composites for fuel cell flow field plates and bipolar plates  

DOE Patents [OSTI]

This invention provides a fuel cell flow field plate or bipolar plate having flow channels on faces of the plate, comprising an electrically conductive polymer composite. The composite is composed of (A) at least 50% by weight of a conductive filler, comprising at least 5% by weight reinforcement fibers, expanded graphite platelets, graphitic nano-fibers, and/or carbon nano-tubes; (B) polymer matrix material at 1 to 49.9% by weight; and (C) a polymer binder at 0.1 to 10% by weight; wherein the sum of the conductive filler weight %, polymer matrix weight % and polymer binder weight % equals 100% and the bulk electrical conductivity of the flow field or bipolar plate is at least 100 S/cm. The invention also provides a continuous process for cost-effective mass production of the conductive composite-based flow field or bipolar plate.

Jang, Bor Z; Zhamu, Aruna; Song, Lulu

2014-10-21T23:59:59.000Z

193

Quality assurance in small plating shops  

SciTech Connect (OSTI)

The potential for electroless nickel coatings in oilfield and petrochemical applications is quite high. The greatest obstacle to their use has been a reputation for poor quality due to a lack of quality control in many plating shops. To overcome this, electroless nickel shops should not only have a quality control program in their operation, but must also document its use and success. This article describes how a plating shoe can develop the necessary procedures, manuals, and paperwork trail to offer quality assurance and to satisfy customers.

McNabb, W.J. (Electroless Nickel Plating of Louisiana, Hammond, LA (United States))

1993-10-01T23:59:59.000Z

194

Ponderomotive phase plate for transmission electron microscopes  

DOE Patents [OSTI]

A ponderomotive phase plate system and method for controllably producing highly tunable phase contrast transfer functions in a transmission electron microscope (TEM) for high resolution and biological phase contrast imaging. The system and method includes a laser source and a beam transport system to produce a focused laser crossover as a phase plate, so that a ponderomotive potential of the focused laser crossover produces a scattering-angle-dependent phase shift in the electrons of the post-sample electron beam corresponding to a desired phase contrast transfer function.

Reed, Bryan W. (Livermore, CA)

2012-07-10T23:59:59.000Z

195

Seasonal underground thermal energy storage using smart thermosiphon arrays.  

E-Print Network [OSTI]

??With oil prices high, and energy prices generally increasing, the pursuit of more economical and less polluting methods of climate control has led to the… (more)

Jankovich, Philip Martin

2012-01-01T23:59:59.000Z

196

Fabrication of nickel microbump on aluminum using electroless nickel plating  

SciTech Connect (OSTI)

Fabrication of nickel microbumps on an aluminum electrode using a nickel displacement and a direct nickel plating process was investigated. Electroless nickel plating reaction with hypophosphite as a reducing agent was not initiated on the aluminum substrate, because aluminum does not have catalytic action on the oxidation of hypophosphite. Accordingly, nickel was initially deposited on the aluminum using nickel displacement plating for the initiation of the electroless plating. Nickel bumps on the aluminum electrode were fabricated by treatment of the nickel displacement plating followed by electroless nickel plating. Nickel microbumps also can be formed on the aluminum electrode without the displacement plating process. Activation of the aluminum surface is an indispensable process to initiate electroless nickel plating. Uniform bumps 20 {micro}m wide and 15 {micro}m high with good configuration were obtained by direct nickel plating after being activated with dimethyl amine borane.

Watanabe, H.; Honma, H. [Kanto Gakuin Univ., Yokohama, Kanagawa (Japan). Faculty of Engineering

1997-02-01T23:59:59.000Z

197

Metallic Bipolar Plates with Composite Coatings  

E-Print Network [OSTI]

that is available in sheet form For corrosion resistance, apply a coating that is a composite of two materials: ­ Filler to provide electrical conductivity · Candidate Materials: graphite, carbon black, TiB2 and CaB6Metallic Bipolar Plates with Composite Coatings Jennifer Mawdsley Argonne National Laboratory Fuel

198

Brazed bipolar plates for PEM fuel cells  

DOE Patents [OSTI]

A liquid-cooled, bipolar plate separating adjacent cells of a PEM fuel cell comprises corrosion-resistant metal sheets brazed together so as to provide a passage between the sheets through which a dielectric coolant flows. The brazement comprises a metal which is substantially insoluble in the coolant. 6 figs.

Neutzler, J.K.

1998-07-07T23:59:59.000Z

199

Titanium carbide bipolar plate for electrochemical devices  

DOE Patents [OSTI]

A corrosion resistant, electrically conductive, non-porous bipolar plate is made from titanium carbide for use in an eletrochemical device. The process involves blending titanium carbide powder with a suitable binder material, and molding the mixture, at an elevated temperature and pressure.

LaConti, Anthony B. (Lynnfield, MA); Griffith, Arthur E. (Lynn, MA); Cropley, Cecelia C. (Acton, MA); Kosek, John A. (Danvers, MA)

2000-07-04T23:59:59.000Z

200

Fabrication procedures for HFIR control plates  

SciTech Connect (OSTI)

The HFIR control system uses Alclad cylindrically shaped components, which have regions containing 31 vol % Eu/sub 2/O/sub 3/ and 38 vol % Ta, respectively. Exacting control of the water passage between these components and adjacent reactor parts is mandatory, and precise dimensional control of the finished products is required. This report describes the procedures developed for manufacturing outer control plates and inner control cylinders. Results are cited which demonstrate that circular-shaped outer control plates can be produced with less than 0.025-in. variation from the specified 9.300-in. radius in any region of the plate. Other results show that, by the exercise of careful control, inner control, inner control plates can be welded into cylindrical geometry with diametrical variations held to less than +- 0.010 in. of the intended 17.846-in. average diam. The cylinders can then be explosively sized, while under compression, with diametric variations of less than 0.005 in. while controlling roundness variations to less than 0.030 in. from the specified 17.842-in. finished diam.

Bowden, G.A.; Hicks, G.R.; Knight, R.W.

1984-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


201

Metalization of lipid vesicles via electroless plating  

SciTech Connect (OSTI)

The encapsulation of metallic particles and metallic oxides within lipid vesicles has recently been of interest for applications such as catalysis, water splitting, and magnetic control of spin coupling. In this communication the authors introduce the concept and practice of the deposition of metal on vesicles by using electroless plating techniques. Coordination of low valent transition metals to organic functional groups on the surface of the bilayer membrane provides a means of binding metal atoms to vesicles. Chemical reduction produced zero valent atoms which serve as sites for further metal deposition by the chemical reduction techniques of electroless plating. Specifically, this procedure involved the binding of a small amount of tetrachloropalladate to the vesicle bilayer, reduction of the palladium(II) to palladium(0), followed by the deposition of much larger amounts of metal from an electroless plating solution. Electroless plating solutions were used for the deposition of palladium, nickel, cobalt, or copper metal onto the catalytic palladium centers. Since the metallic particles were associated with the vesicles, colloids were formed that were stable in water for much longer periods than the control metal particles formed in water alone. If the vesicles were composed in part of unsaturated lipids, with the olefinic groups on the hydrocarbon chains, the initial evidence suggests the transition metal was directed into the bilayer, rather than staying on the surface.

Ferrar, W.T.; O'Brien, D.F.; Warshawsky, A.; Voycheck, C.L.

1988-01-06T23:59:59.000Z

202

Ground Turkey and Potato Plate Ingredients  

E-Print Network [OSTI]

Ground Turkey and Potato Plate Ingredients: 1 onion 1/2 pound ground turkey 1 cup ketchup, low sodium 4 medium potatoes 4 ounces cheddar cheese, low-fat Directions 1. Cut the ends off of the onion. Meanwhile pierce potatoes in several places with fork. Place on baking dish in microwave oven. Microwave

Liskiewicz, Maciej

203

Titanium Carbide Bipolar Plate for Electrochemical Devices  

SciTech Connect (OSTI)

Titanium carbide comprises a corrosion resistant, electrically conductive, non-porous bipolar plate for use in an electrochemical device. The process involves blending titanium carbide powder with a suitable binder material, and molding the mixture, at an elevated temperature and pressure.

LaConti, Anthony B.; Griffith, Arthur E.; Cropley, Cecelia C.; Kosek, John A.

1998-05-08T23:59:59.000Z

204

Brazed bipolar plates for PEM fuel cells  

DOE Patents [OSTI]

A liquid-cooled, bipolar plate separating adjacent cells of a PEM fuel cell comprising corrosion-resistant metal sheets brazed together so as to provide a passage between the sheets through which a dielectric coolant flows. The brazement comprises a metal which is substantially insoluble in the coolant.

Neutzler, Jay Kevin (Rochester, NY)

1998-01-01T23:59:59.000Z

205

Spectral characterization of storage phosphor imaging plates  

SciTech Connect (OSTI)

This work presents attenuation and sensitivity measurements of radiographic imaging plates (IPs) with quasimonoenergetic X-rays in the 8–60 kiloelectronvolt range. The measurements are used to validate theoretical predictions. A short overview of the theoretical model is given. The model can be used to describe the sensitivity of different detector types to a wide range of X-ray energies.

Deresch, A.; Jechow, M.; Gollwitzer, C. [Federal Institute for Materials Research and Testing Unter den Eichen 87, 12205 Berlin (Germany)

2014-02-18T23:59:59.000Z

206

Bending Energy of Rods and Plates  

E-Print Network [OSTI]

descriptors DUH HFFHQWULFLW\\ VSKHULFLW\\ 3$ SHULPHWHU VTXDUHG GLYLGHG E\\ WLPHV area) and bending energy185 Chapter 9 Bending Energy of Rods and Plates Integrated curvature and bending energy of a closed curvature/energy values over a chain-code description of the contour (as in binary length estimators). We

van Vliet, Lucas J.

207

Facility overview for commercial application of selected Rocky Flats facilities  

SciTech Connect (OSTI)

The purpose of this Facility Overview is to support the Rocky Flats Local Impacts Initiative`s Request for Interest, to solicit interest from commercial corporations for utilizing buildings 865 and 883, and the equipment contained within each building, for a commercial venture. In the following sections, this document describes the Rocky Flats Site, the buildings available for lease, the equipment within these buildings, the site services available to a tenant, the human resources available to support operations in buildings 865 and 883, and the environmental condition of the buildings and property. In addition, a brief description is provided of the work performed to date to explore the potential products that might be manufactured in Buildings 865 and 883, and the markets for these products.

NONE

1996-11-01T23:59:59.000Z

208

Plane-parallel waves as duals of the flat background  

E-Print Network [OSTI]

We give a classification of non-Abelian T-duals of the flat metric in D=4 dimensions with respect to the four-dimensional continuous subgroups of the Poincare group. After dualizing the flat background, we identify majority of dual models as conformal sigma models in plane-parallel wave backgrounds, most of them having torsion. We give their form in Brinkmann coordinates. We find, besides the plane-parallel waves, several diagonalizable curved metrics with nontrivial scalar curvature and torsion. Using the non-Abelian T-duality, we find general solution of the classical field equations for all the sigma models in terms of d'Alembert solutions of the wave equation.

Ladislav Hlavaty; Ivo Petr

2014-12-03T23:59:59.000Z

209

Polymer solidification of mixed wastes at the Rocky Flats Plant  

SciTech Connect (OSTI)

The Rocky Flats Plant is pursuing polymer solidification as a viable treatment option for several mixed waste streams that are subject to land disposal restrictions within the Resource Conservation and Recovery Act provisions. Tests completed to date using both surrogate and actual wastes indicate that polyethylene microencapsulation is a viable treatment option for several mixed wastes at the Rocky Flats Plant, including nitrate salts, sludges, and secondary wastes such as ash. Treatability studies conducted on actual salt waste demonstrated that the process is capable of producing waste forms that comply with all applicable regulatory criteria, including the Toxicity Characteristic Leaching Procedure. Tests have also been conducted to evaluate the feasibility of macroencapsulating certain debris wastes in polymers. Several methods and plastics have been tested for macroencapsulation, including post-consumer recycle and regrind polyethylene.

Faucette, A.M.; Logsdon, B.W.; Lucerna, J.J.; Yudnich, R.J.

1994-02-01T23:59:59.000Z

210

DECOMMISSIONING CHALLENGES AT THE ROCKY FLATS ENVIRONMENTAL TECHNOLOGY SITE  

SciTech Connect (OSTI)

This paper presents a discussion of the demolition of the Building 788 cluster at the Rocky Flats Environmental Technology Site (RFETS) in Golden, Colorado. The Building 788 Cluster was a Resource Conservation and Recovery Act (RCRA) permitted storage facilities and ancillary structures. Topics covered include the methods employed for Project Planning, Regulatory Compliance, Waste Management, Hazard Identification, Radiological Controls, Risk Management, Field Implementation, and Cost Schedule control, and Lessons Learned and Project Closeout.

Dorr, K. A.; Hoover, J.

2002-02-25T23:59:59.000Z

211

Rocky Flats Plant Site Environmental Report: 1993 Highlights  

SciTech Connect (OSTI)

The Rocky Flats Plant Site Environmental Report provides summary information on the plant`s environmental monitoring programs and the results recorded during 1993. The report contains a compliance summary, results of environmental monitoring and other related programs, a review of environmental remediation activities, information on external gamma radiation dose monitoring, and radiation dose estimates for the surrounding population. This section provides an overview of these topics and summarizes more comprehensive discussions found in the main text of this annual report.

Not Available

1993-12-31T23:59:59.000Z

212

MEASURING THE JET POWER OF FLAT-SPECTRUM RADIO QUASARS  

SciTech Connect (OSTI)

We use frequency-dependent position shifts of flat-spectrum radio cores to estimate the kinetic power of active galactic nucleus (AGN) jets. We find a correlation between the derived jet powers and AGN narrow-line luminosity, consistent with the well-known relation for radio galaxies and steep spectrum quasars. This technique can be applied to intrinsically weak jets even at high redshift.

Shabala, S. S.; Santoso, J. S. [School of Mathematics and Physics, University of Tasmania, Private Bag 37, Hobart, TAS 7001 (Australia); Godfrey, L. E. H. [International Centre for Radio Astronomy Research, Curtin University, GPO Box U1987, Perth, Western Australia 6845 (Australia)

2012-09-10T23:59:59.000Z

213

Sex, dispersion and aggression in Western Sandpipers on the Bolivar Flats, Texas  

E-Print Network [OSTI]

Flats, located on the Bolivar Peninsula, 4. 8 km northeast of Galveston, Texas. The wintering range of Western Sandpipers extends from California and North Carolina in the north, south to Peru and Surinam (AOU 1983). The Bolivar Flats, located...

Gordon, Lynn Marie

2012-06-07T23:59:59.000Z

214

Asymptotically flat radiating solutions in third order Lovelock gravity  

SciTech Connect (OSTI)

In this paper, we present an exact spherically symmetric solution of third order Lovelock gravity in n dimensions which describes the gravitational collapse of a null dust fluid. This solution is asymptotically (anti-)de Sitter or flat depending on the choice of the cosmological constant. Using the asymptotically flat solution for n{>=}7 with a power-law form of the mass as a function of the null coordinate, we present a model for a gravitational collapse in which a null dust fluid radially injects into an initially flat and empty region. It is found that a naked singularity is inevitably formed whose strength is different for the n=7 and n{>=}8 cases. In the n=7 case, the limiting focusing condition for the strength of curvature singularity is satisfied. But for n{>=}8, the strength of curvature singularity depends on the rate of increase of mass of the spacetime. These considerations show that the third order Lovelock term weakens the strength of the curvature singularity.

Dehghani, M. H. [Physics Department and Biruni Observatory, College of Sciences, Shiraz University, Shiraz 71454 (Iran, Islamic Republic of); Research Institute for Astrophysics and Astronomy of Maragha (RIAAM), Maragha (Iran, Islamic Republic of); Farhangkhah, N. [Physics Department and Biruni Observatory, College of Sciences, Shiraz University, Shiraz 71454 (Iran, Islamic Republic of)

2008-09-15T23:59:59.000Z

215

Map of mixed prairie grassland vegetation, Rocky Flats, Colorado  

SciTech Connect (OSTI)

A color vegetation map at the scale of 1:12,000 of the area surrounding the Rocky Flats, Rockwell International Plant near Boulder, Colorado, provides a permanent record of baseline data which can be used to monitor changes in both vegetation and environment and thus to contribute to future land management and land-use policies. Sixteen mapping units based on species composition were identified, and characterized by two 10-m/sup 2/ vegetation stands each. These were grouped into prairie, pasture, and valley side on the basis of their species composition. Both the mapping units and these major groups were later confirmed by agglomerative clustering analysis of the 32 vegetation stands on the basis of species composition. A modified Bray and Curtis ordination was used to determine the environmental factor complexes controlling the distribution of vegetation at Rocky flats. Recommendations are made for future policies of environmental management and predictions of the response to environmental change of the present vegetation at the Rocky Flats site.

Clark, S J.V.; Webber, P J; Komarkova, V; Weber, W A

1980-01-01T23:59:59.000Z

216

The coupling of mechanical dynamics and induced currents in plates and surfaces  

SciTech Connect (OSTI)

Significant mechanical reactions and deflections may be produced when electrical eddy currents induced in a conducting structure by transformer-like electromotive forces interact with background magnetic fields. Additional eddy currents induced by structural motion through the background fields modify both the mechanical and electrical dynamic behavior of the system. The observed effects of these motional eddy currents are sometimes referred to as magnetic damping and magnetic stiffness. This paper addresses the coupled structural deformation and eddy currents in flat plates and simple two-dimensional surfaces in three-space. A coupled system of equations has been formulated using finite element techniques for the mechanical aspects and a mesh network method for the electrical aspects of the problem.

Weissenburger, D.W.; Bialek, J.M.

1986-10-01T23:59:59.000Z

217

Fuel cell plates with improved arrangement of process channels for enhanced pressure drop across the plates  

DOE Patents [OSTI]

A plate for a fuel cell has an arrangement of ribs defining an improved configuration of process gas channels and slots on a surface of the plate which provide a modified serpentine gas flow pattern across the plate surface. The channels are generally linear and arranged parallel to one another while the spaced slots allow cross channel flow of process gas in a staggered fashion which creates a plurality of generally mini-serpentine flow paths extending transverse to the longitudinal gas flow along the channels. Adjacent pairs of the channels are interconnected to one another in flow communication. Also, a bipolar plate has the aforementioned process gas channel configuration on one surface and another configuration on the opposite surface. In the other configuration, there are not slots and the gas flow channels have a generally serpentine configuration.

Spurrier, Francis R. (Whitehall Boro, PA); Pierce, Bill L. (Whitehall Boro, PA); Wright, Maynard K. (Bethel Park, PA)

1986-01-01T23:59:59.000Z

218

Thermal response of a flat heat pipe sandwich structure to a localized heat flux  

E-Print Network [OSTI]

Thermal response of a flat heat pipe sandwich structure to a localized heat flux G. Carbajal a , C The temperature distribution across a flat heat pipe sandwich structure, subjected to an intense localized thermal to the evaporator side of the flat heat pipe, while the condenser side was cooled via natural convective

Wadley, Haydn

219

A slotted orifice plate used as a flow measurement device  

E-Print Network [OSTI]

The standard orifice plate is used extensively by the natural gas industry for the metering of fuel. Because of the costs associated with errors in flow measurement inherent with the use of a standard orifice plate, any improvements upon...

Macek, Michael Lee

2012-06-07T23:59:59.000Z

220

A fuel cell stack with Heterogeneous composite bipolar plate.  

E-Print Network [OSTI]

??The design of the bipolar plates decides most of the cost of Fuel Cell.Bipolar plate has a great influence in Fuel Cell performance.We choose carbon… (more)

Lai, Cheng-chih

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


221

Selective Electroless Nickel Plating of Particle Arrays on Polyelectrolyte Multilayers  

E-Print Network [OSTI]

Selective Electroless Nickel Plating of Particle Arrays on Polyelectrolyte Multilayers Ilsoon Lee Received June 30, 2003. Revised Manuscript Received September 25, 2003 Selective electroless nickel plating, it was demonstrated that selective electroless nickel plating on complex 3-D microstructures with submicron resolution

Lee, Ilsoon

222

Wave turbulence served up on a plate  

E-Print Network [OSTI]

Wave turbulence in a thin elastic plate is experimentally investigated. By using a Fourier transform profilometry technique, the deformation field of the plate surface is measured simultaneously in time and space. This enables us to compute the wavevector-frequency Fourier ($\\mathbf k, \\omega$) spectrum of the full space-time deformation velocity. In the 3D ($\\mathbf k, \\omega$) space, we show that the energy of the motion is concentrated on a 2D surface that represents a nonlinear dispersion relation. This nonlinear dispersion relation is close to the linear dispersion relation. This validates the usual wavenumber-frequency change of variables used in many experimental studies of wave turbulence. The deviation from the linear dispersion, which increases with the input power of the forcing, is attributed to weak non linear effects. Our technique opens the way for many new extensive quantitative comparisons between theory and experiments of wave turbulence.

Pablo Cobelli; Philippe Petitjeans; Agnes Maurel; Vincent Pagneux; Nicolas Mordant

2009-10-28T23:59:59.000Z

223

Your Mission: To become familiar with the major plate boundaries through exploration of plate tectonic features using Google Earth.  

E-Print Network [OSTI]

boundaries through exploration of plate tectonic features using Google Earth. Your Supplies: (1) A computer with internet access and the Google Earth program of Earth's tectonic plates using Google Earth. To do this, login

Smith-Konter, Bridget

224

Vibrations of circular steel plates with damping  

E-Print Network [OSTI]

distributed. Usually, the prime objection to vibrations produced by machines is their effect on humans. These are high frequency vibrations that produce troublesome noise. Low frequency vibrations are often trans- mitted and these may damage nearby... materials used with fans, motors, engines, presses, turbines and similar machines. Byars (1)* studied vibrations of a circular plate on three supports for node patterns, amplitudes and frequencies. Ballentine (2) investigated the vibrations of circular...

Sheth, Prafulchandra Naginlal

1967-01-01T23:59:59.000Z

225

Syneresis and delayed detachment in agar plates  

E-Print Network [OSTI]

Biogels made of crosslinked polymers such as proteins or polysaccharides behave as porous soft solids and store large amount of solvent. These gels undergo spontaneous aging, called syneresis that consists in the shrinkage of the gel matrix and the progressive expulsion of the solvent, which eventually leads to the gel detachment from its container. Here we report on the syneresis phenomena in agar plates that consist in Petri dishes filled with a gel mainly composed of agar. Direct observations and speckle pattern correlation analyses allow us to rationalize the delayed detachment of the gel from the sidewall of the Petri dish. The detachment time $t^*$ is mainly controlled by the gel minimum thickness $e_{min}$ along the periphery of the plate: $t^*$ increases as a robust function of $e_{min}$ that neither depends on the age of the gel nor on any previous mass loss. Time-resolved correlation spectroscopy reveals that the speckle decorrelation rate increases a few hours before $t^*$ and that the gel detachment can be anticipated. This work provides quantitative observables to predict the shelf life of agar plates and highlights the key role of the competition between the syneresis and the gel adhesion to the wall in the detachment process.

Thibaut Divoux; Bosi Mao; Patrick Snabre

2014-10-30T23:59:59.000Z

226

Rocky Flats Neutron Detector Testing at Valduc, France  

SciTech Connect (OSTI)

Recent program requirements of the US Department of Energy/NNSA have led to a need for a criticality accident alarm system to be installed at a newly activated facility. The Criticality Safety Group of the Lawrence Livermore National Laboratory (LLNL) was able to recover and store for possible future use approximately 200 neutron criticality detectors and 20 master alarm panels from the former Rocky Flats Plant in Golden, Colorado when the plant was closed. The Criticality Safety Group participated in a facility analysis and evaluation, the engineering design and review process, as well as the refurbishment, testing, and recalibration of the Rocky Flats criticality alarm system equipment to be used in the new facility. In order to demonstrate the functionality and survivability of the neutron detectors to the effects of an actual criticality accident, neutron detector testing was performed at the French CEA Valduc SILENE reactor from October 7 to October 19, 2010. The neutron detectors were exposed to three criticality events or pulses generated by the SILENE reactor. The first excursion was performed with a bare or unshielded reactor, and the second excursion was made with a lead shielded/reflected reactor, and the third excursion with a polyethylene reflected core. These tests of the Rocky Flats neutron detectors were performed as a part of the 2010 Criticality Accident Alarm System Benchmark Measurements at the SILENE Reactor. The principal investigators for this series of experiments were Thomas M. Miller and John C. Wagner of the Oak Ridge National Laboratory, with Nicolas Authier and Nathalie Baclet of CEA Valduc. Several other organizations were also represented, including the Y-12 National Security Complex, Lawrence Livermore National Laboratory, Los Alamos National Laboratory, CEA Saclay, and Babcock International Group.

Kim, S S; Dulik, G M

2011-01-03T23:59:59.000Z

227

Entanglement entropy in Galilean conformal field theories and flat holography  

E-Print Network [OSTI]

We present the analytical calculation of entanglement entropy for a class of two dimensional field theories governed by the symmetries of the Galilean conformal algebra, thus providing a rare example of such an exact computation. These field theories are the putative holographic duals to theories of gravity in three-dimensional asymptotically flat spacetimes. We provide a check of our field theory answers by an analysis of geodesics. We also exploit the Chern-Simons formulation of three-dimensional gravity and adapt recent proposals of calculating entanglement entropy by Wilson lines in this context to find an independent confirmation of our results from holography.

Arjun Bagchi; Rudranil Basu; Daniel Grumiller; Max Riegler

2014-10-15T23:59:59.000Z

228

East Flat Rock, North Carolina: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address:011-DNA Jump37. It is classified asThis article is aAg Products JumpFarmingdale, NewFlat

229

ROCKY FLATS CLOSURE PROJECT EM, AUG 2006 | Department of Energy  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of Energy Power Systems Engineering Research and DevelopmentDepartmentinBattery TechnologyJanuaryROCKY FLATS

230

Deep Resistivity Structure of Yucca Flat, Nevada Test Site, Nevada.  

SciTech Connect (OSTI)

The Department of Energy (DOE) and the National Nuclear Security Administration (NNSA) at their Nevada Site Office are addressing groundwater contamination resulting from historical underground nuclear testing through the Environmental Management program and, in particular, the Underground Test Area project. One issue of concern is the nature of the somewhat poorly constrained pre Tertiary geology and its effects on ground-water flow in the area adjacent to a nuclear test. Ground water modelers would like to know more about the hydrostratigraphy and geologic structure to support a hydrostratigraphic framework model that is under development for the Yucca Flat Corrective Action Unit (CAU). During 2003, the U.S. Geological Survey, supported by the DOE and NNSA-NSO, collected and processed data from 51 magnetotelluric (MT) and audio-magnetotelluric (AMT) stations at the Nevada Test Site in and near Yucca Flat to assist in characterizing the pre-Tertiary geology in that area. The primary purpose was to refine the character, thickness, and lateral extent of pre Tertiary confining units. In particular, a major goal has been to define the upper clastic confining unit (late Devonian – Mississippian-age siliciclastic rocks assigned to the Eleana Formation and Chainman Shale) in the Yucca Flat area. The MT and AMT data have been released in separate USGS Open File Reports. The Nevada Test Site magnetotelluric data interpretation presented in this report includes the results of detailed two-dimensional (2 D) resistivity modeling for each profile (including alternative interpretations) and gross inferences on the three dimensional (3 D) character of the geology beneath each station. The character, thickness, and lateral extent of the Chainman Shale and Eleana Formation that comprise the Upper Clastic Confining Unit are generally well determined in the upper 5 km. Inferences can be made regarding the presence of the Lower Clastic Confining Unit at depths below 5 km. Large fault structures such as the CP Thrust fault, the Carpetbag fault, and the Yucca fault that cross Yucca Flat are also discernable as are other smaller faults. The subsurface electrical resistivity distribution and inferred geologic structures determined by this investigation should help constrain the hydrostratigraphic framework model that is under development.

Theodore H. Asch, Brian D. Rodriguez; Jay A. Sampson; Erin L. Wallin; and Jackie M. Williams.

2006-09-18T23:59:59.000Z

231

Big Flats, Wisconsin: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin: Energy ResourcesJersey: EnergyBerthoud,Biodiesel Place:Forge07.Daddy sFlats,

232

Windy Flats(3Q09 portion) | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160 East 300 South Place:ReferenceEdit JumpWill County,Windspire EnergyFlats Jump

233

DOE - Office of Legacy Management -- Rocky Flats SOG  

Office of Legacy Management (LM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofof EnergyYou$0.C. 20545*. . : '* FEB 1972.SOG Rocky Flats Site,

234

Particle Transport in Parallel-Plate Reactors  

SciTech Connect (OSTI)

A major cause of semiconductor yield degradation is contaminant particles that deposit on wafers while they reside in processing tools during integrated circuit manufacturing. This report presents numerical models for assessing particle transport and deposition in a parallel-plate geometry characteristic of a wide range of single-wafer processing tools: uniform downward flow exiting a perforated-plate showerhead separated by a gap from a circular wafer resting on a parallel susceptor. Particles are assumed to originate either upstream of the showerhead or from a specified position between the plates. The physical mechanisms controlling particle deposition and transport (inertia, diffusion, fluid drag, and external forces) are reviewed, with an emphasis on conditions encountered in semiconductor process tools (i.e., sub-atmospheric pressures and submicron particles). Isothermal flow is assumed, although small temperature differences are allowed to drive particle thermophoresis. Numerical solutions of the flow field are presented which agree with an analytic, creeping-flow expression for Re < 4. Deposition is quantified by use of a particle collection efficiency, which is defined as the fraction of particles in the reactor that deposit on the wafer. Analytic expressions for collection efficiency are presented for the limiting case where external forces control deposition (i.e., neglecting particle diffusion and inertia). Deposition from simultaneous particle diffusion and external forces is analyzed by an Eulerian formulation; for creeping flow and particles released from a planar trap, the analysis yields an analytic, integral expression for particle deposition based on process and particle properties. Deposition from simultaneous particle inertia and external forces is analyzed by a Lagrangian formulation, which can describe inertia-enhanced deposition resulting from particle acceleration in the showerhead. An approximate analytic expression is derived for particle velocity at the showerhead exit as a function of showerhead geometry, flow rate, and gas and particle properties. The particle showerhead-exit velocity is next used as an initial condition for particle transport between the plates to determine whether the particle deposits on the wafer, as a function of shower-head-exit particle velocity, the plate separation, flow rate, and gas and particle properties. Based on the numerical analysis, recommendations of best practices are presented that should help tool operators and designers reduce particle deposition in real tools. These guidelines are not intended to replace detailed calculations, but to provide the user with a general feel for inherently-clean practices.

Rader, D.J.; Geller, A.S.

1999-08-01T23:59:59.000Z

235

Spatial homogenization for plate-type critical assemblies. [LMFBR  

SciTech Connect (OSTI)

Standard calculational models of plate-type LMFBR critical assemblies do not explicitly represent individual plates. Instead, detailed plate-by-plate calculations are performed only for each representative cell type, and homogenized cross sections are defined by flux-volume weighting of individual plate cross sections. Subsequent reactor calculations are performed by modeling each cell type with homogenized cross sections. The homogenized cross sections are sensitive to the manner in which the cell leakage is modeled. The intent of this paper is to present a method of representing the cell leakage which results in more accurate homogenized cross sections than the methods presently in use.

Rempe, K.R.; Smith, K.S.

1983-01-01T23:59:59.000Z

236

Casimir interaction energies for magneto-electric ?-function plates  

E-Print Network [OSTI]

We present boundary conditions for the electromagnetic fields on a \\delta-function plate, having both electric and magnetic properties, sandwiched between two magneto-electric semi-infinite half spaces. The optical properties for an isolated \\delta-function plate are shown to be independent of the longitudinal material properties of the plate. The Casimir-Polder energy between an isotropically polarizable atom and a magneto-electric \\delta-function plate is attractive for a purely electric \\delta-function plate, repulsive for a purely magnetic \\delta-function plate, and vanishes for the simultaneous perfect conductor limit of both electric and magnetic properties of the \\delta-function plate. The interaction energy between two identical \\delta-function plates is always attractive. It can be attractive or repulsive when the plates have electric and magnetic properties interchanged and reproduces Boyer's result for the interaction energy between perfectly conducting electric and magnetic plates. The change in the Casimir-Polder energy in the presence of a \\delta-function plate on a magneto-electric substrate is substantial when the substrate is a weak dielectric.

Kimball A. Milton; Prachi Parashar; Martin Schaden; K. V. Shajesh

2013-02-01T23:59:59.000Z

237

A novel plating process for microencapsulating metal hydrides  

SciTech Connect (OSTI)

One approach to increasing the lifetime of the metal hydride electrode has been the use of conventional electroless plating to produce a coating of copper or nickel on the surface of the metal hydride powders. In this paper, a novel method for microencapsulating the active electrode powders is presented. This new plating technique takes advantage of the reducing power of hydrogen already stored inside the metal hydride to plate a variety of metals onto metal hydride materials. This method greatly simplifies electroless plating for these powders, eliminating the need for stabilizers and additives typically required for conventional electroless plating solutions. Metals that can be electrolessly plated with stored hydrogen have been identified based on thermodynamic considerations. Experimentally, micrometers thick coatings of copper, silver, and nickel have been plated on several metal hydrides.

Law, H.H.; Vyas, B.; Zahurak, S.M.; Kammlott, G.W. [AT and T Bell Labs., Murray Hill, NJ (United States)

1996-08-01T23:59:59.000Z

238

Materials selection for the US INTOR divertor collector plate  

SciTech Connect (OSTI)

The divertor collector plate in the INTOR reactor will be subjected to high heat, particle, and neutron fluxes, making it the most severely damaged torus component. The collector plate is composed of a protection plate, which is directly exposed to the particle flux, and a heat sink which provides support for the protection plate and carries the water coolant. The high-Z refractory metals have been considered for use as the protection plate material, and austenitic stainless steels and copper alloys have been considered as the heat sink material. Tungsten and Type 316 stainless steels have been selected for the protection plate and heat sink, respectively. The protection plate has a sputtering lifetime of 1.75 y at a 50% duty factor, while the heat sink is expected to last the lifetime of the reactor.

Mattas, R.F.; Misra, B.; Smith, D.L.; Morgan, G.D.; Delaney, M.; Gold, R.

1981-01-01T23:59:59.000Z

239

Geologic and geotechnical assessment RFETS Building 371, Rocky Flats, Colorado  

SciTech Connect (OSTI)

This report describes the review and evaluation of the geological, geotechnical and geophysical data supporting the design basis analysis for the Rocky Flats Environmental Test Site (RFETS) Building 371. The primary purpose of the geologic and geotechnical reviews and assessments described herein are to assess the adequacy of the crustal and near surface rock and soil model used in the seismic analysis of Building 371. This review was requested by the RFETS Seismic Evaluation Program. The purpose was to determine the adequacy of data to support the design basis for Building 371, with respect to seismic loading. The objectives required to meet this goal were to: (1) review techniques used to gather data (2) review analysis and interpretations of the data; and (3) make recommendations to gather additional data if required. Where there were questions or inadequacies in data or interpretation, recommendations were made for new data that will support the design basis analysis and operation of Building 371. In addition, recommendations are provided for a geologic and geophysical assessment for a new facility at the Rocky Flats Site.

Maryak, M.E.; Wyatt, D.E.; Bartlett, S.F.; Lewis, M.R.; Lee, R.C.

1995-12-13T23:59:59.000Z

240

Using Surface Impedance for Calculating Wakefields in Flat Geometry  

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

Beginning with Maxwell's equations and assuming only that the wall interaction can be approximated by a surface impedance, we derive formulas for the generalized longitudinal and transverse impedance in flat geometry, from which the wakefields can also be obtained. From the generalized impedances, by taking the proper limits, we obtain the normal longitudinal, dipole, and quad impedances in flat geometry. These equations can be applied to any surface impedance, such as the known dc, ac, and anomalous skin models of wall resistance, a model of wall roughness, or one for a pipe with small, periodic corrugations. We show that, for the particular case of dc wall resistance, the longitudinal impedance obtained here agrees with a known result in the literature, a result that was derived from a very general formula by Henke and Napoly. As concrete example, we apply our results to representative beam and machine parameters in the undulator region of LCLS-II and estimate the impact of the transverse wakes on the machine performance.

Bane, Karl; Stupakov, Gennady

2015-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


241

Aspects of electroless nickel plating on molybdenum  

SciTech Connect (OSTI)

A process for depositing an adherent coating of an electroless nickel-phosphorus alloy on molybdenum was developed. The required pretreatment processes included an anodic etch in a chromic acid-nitric acid solution, an anodic etch in a phosphonic acid solution, and an oxide stripping step in a chromic acid-nitric acid solution. Initiation of the electroless nickel plating was accomplished through a series of strikes in the nickel bath. Scale up from laboratory parts to large components involved optimization of parameters such as pretreat time, current density, anode to cathode ratio and strike time.

Mikkola, R.D.; Daugherty, C.E.; Harris, G.E.; Neff, W.A.; Owens, W.W.

1984-07-01T23:59:59.000Z

242

Sampling Plan for Assaying Plates Containing Depleted or Normal Uranium  

SciTech Connect (OSTI)

This paper describes the rationale behind the proposed method for selecting a 'representative' sample of uranium metal plates, portions of which will be destructively assayed at the Y-12 Security Complex. The total inventory of plates is segregated into two populations, one for Material Type 10 (depleted uranium (DU)) and one for Material Type 81 (normal [or natural] uranium (NU)). The plates within each population are further stratified by common dimensions. A spreadsheet gives the collective mass of uranium element (and isotope for DU) and the piece count of all plates within each stratum. These data are summarized in Table 1. All plates are 100% uranium metal, and all but approximately 60% of the NU plates have Kel-F{reg_sign} coating. The book inventory gives an overall U-235 isotopic percentage of 0.22% for the DU plates, ranging from 0.19% to 0.22%. The U-235 ratio of the NU plates is assumed to be 0.71%. As shown in Table 1, the vast majority of the plates are comprised of depleted uranium, so most of the plates will be sampled from the DU population.

Ivan R. Thomas

2011-11-01T23:59:59.000Z

243

Elastocapillary coalescence of plates and pillars  

E-Print Network [OSTI]

When a fluid-immersed array of lamellae or filaments that is attached to a substrate is dried, evaporation leads to the formation of menisci on the tips of the plates or pillars that bring them together. Similarly, when hair dries it clumps together due to capillary forces induced by the liquid menisci between the flexible hairs. Building on prior experimental observations, we use a combination of theory and computation to understand the nature of this instability and its evolution in both the two-dimensional and three-dimensional setting of the problem. For the case of lamellae, we explicitly derive the interaction torques based on the relevant physical parameters. A Bloch-wave analysis for our periodic mechanical system captures the critical volume of the liquid and the 2-plate-collapse eigenmode at the onset of instability. We study the evolution of clusters and their arrest using numerical simulations to explain the hierarchical cluster formation and characterize the sensitive dependence of the final structures on the initial perturbations. We then generalize our analysis to treat the problem of pillar collapse in 3D, where the fluid domain is completely connected and the interface is a surface with the uniform mean curvature. Our theory and simulations capture the salient features of both previous experimental observations and our own in terms of the key parameters that can be used to control the kinetics of the process.

Zhiyan Wei; Tobias Schneider; Jungchul Kim; Ho-Young Kim; Joanna Aizenberg; L. Mahadevan

2014-08-04T23:59:59.000Z

244

C6 plate puncture testing report.  

SciTech Connect (OSTI)

There are numerous scenarios where critical systems could be subject to penetration by projectiles or fixed objects (e.g., collision, natural disaster, act of terrorism, etc.). It is desired to use computational models to examine these scenarios and make risk-informed decisions; however, modeling of material failure is an active area of research, and new models must be validated with experimental data. The purpose of this report is to document the experimental work performed from FY07 through FY08 on the Campaign Six Plate Puncture project. The goal of this project was to acquire experimental data on the puncture and penetration of metal plates for use in model validation. Of particular interest is the PLH failure model also known as the multilinear line segment model. A significant amount of data that will be useful for the verification and validation of computational models of ductile failure were collected during this project were collected and documented herein; however, much more work remains to be performed, collecting additional experimental data that will further the task of model verification.

Vangoethem, Douglas J.; Cordova, Theresa Elena; Reu, Phillip L.

2013-04-01T23:59:59.000Z

245

Majorana Flat Bands in s-Wave Gapless Topological Superconductors  

E-Print Network [OSTI]

We demonstrate how the non-trivial interplay between spin-orbit coupling and nodeless $s$-wave superconductivity can drive a fully gapped two-band topological insulator into a time-reversal invariant gapless topological superconductor supporting symmetry-protected Majorana flat bands. We characterize topological phase diagrams by a ${\\mathbb Z}_2 \\times{\\mathbb Z}_2$ partial Berry-phase invariant, and show that, despite the trivial crystal geometry, no unique bulk-boundary correspondence exists. We trace this behavior to the anisotropic quasiparticle bulk gap closing, linear vs. quadratic, and argue that this provides a unifying principle for gapless topological superconductivity. Experimental implications for tunneling conductance measurements are addressed, relevant for lead chalcogenide materials.

Shusa Deng; Gerardo Ortiz; Amrit Poudel; Lorenza Viola

2014-04-28T23:59:59.000Z

246

Improving the diversity of manufacturing electroluminescent flat panel displays  

SciTech Connect (OSTI)

Crystalline calcium thiogallate with a cerium dopant has been deposited by metal-organic chemical vapor deposition (MOCVD) at temperatures below 600{degrees}C on a low cost glass substrate. An EL luminance of 1.05 fL was observed 40 volts above threshold at 60 Hz. This is more than an order of magnitude improvement over earlier crystalline-as-deposited thiogallate materials. These results pave the way for the use of MOCVD as a potential method for processing full color thin-film electroluminescent (TFEL) flat panel displays. The formation of the CaGa{sub 2}S{sub 4}:Ce phosphor requires precise control over a number of deposition parameters including flow rates, substrate temperature, and reactor pressure. The influence of these parameters will be discussed in terms of structure, uniformity, and TFEL device performance.

Moss, T.S.; Samuels, J.A.; Smith, D.C. [and others

1995-09-01T23:59:59.000Z

247

Epidemiologic surveillance. Annual report for EG&G Rocky Flats  

SciTech Connect (OSTI)

Epidemiologic surveillance at U.S. Department of Energy (DOE) facilities consists of regular and systematic collection, analysis, and interpretation of data on absences resulting from illness and injury in the work force. Its purpose is to provide an early warning system for health problems occurring among employees at participating sites. Data are collected by coordinators at each site and submitted to the Epidemiologic Surveillance Data Center, located at the Oak Ridge Institute for Science and Education, where quality control procedures and analyses are carried out. Rates of absences and rates of diagnoses associated with absences are analyzed by occupation and other relevant variables. They may be compared with the disease experience of different groups within the DOE work force and with populations that do not work for DOE to identify disease patterns or clusters that may be associated with work activities. This report presents the 1994 morbidity data for the Rocky Flats plant.

NONE

1994-12-31T23:59:59.000Z

248

Diffractive optics for compact flat panel displays. Final report  

SciTech Connect (OSTI)

Three years ago LLNL developed a practical method to dramatically reduce the chromatic aberration in single element diffractive imaging lenses. High efficiency, achromatic imaging lenses have been fabricated for human vision correction. This LDRD supported research in applying our new methods to develop a unique, diffraction-based optical interface with solid state, microelectronic imaging devices. Advances in microelectronics have led to smaller, more efficient components for optical systems. There have, however, been no equivalent advances in the imaging optics associated with these devices. The goal of this project was to replace the bulky, refractive optics in typical head-mounted displays with micro-thin diffractive optics to directly image flat-panel displays into the eye. To visualize the system think of the lenses of someone`s eyeglasses becoming flat-panel displays. To realize this embodiment, we needed to solve the problems of large chromatic aberrations and low efficiency that are associated with diffraction. We have developed a graceful tradeoff between chromatic aberrations and the diffractive optic thickness. It turns out that by doubling the thickness of a micro-thin diffractive lens we obtain nearly a two-times improvement in chromatic performance. Since the human eye will tolerate one diopter of chromatic aberration, we are able to achieve an achromatic image with a diffractive lens that is only 20 microns thick, versus 3 mm thickness for the comparable refractive lens. Molds for the diffractive lenses are diamond turned with sub-micron accuracy; the final lenses are cast from these molds using various polymers. We thus retain both the micro- thin nature of the diffractive optics and the achromatic image quality of refractive optics. During the first year of funding we successfully extended our earlier technology from 1 cm diameter optics required for vision applications up to the 5 cm diameter optics required for this application. 3 refs., 6 figs.

Sweeney, D.; DeLong, K.

1997-04-29T23:59:59.000Z

249

Catalytic bipolar interconnection plate for use in a fuel cell  

DOE Patents [OSTI]

A bipolar interconnection plate for use between adjacent fuel cell units in a stacked fuel cell assembly. Each plate is manufactured from an intermetallic composition, examples of which include NiAl or Ni.sub.3 Al which can catalyze steam reforming of hydrocarbons. Distributed within the intermetallic structure of the plate is a ceramic filler composition. The plate includes a first side with gas flow channels therein and a second side with fuel flow channels therein. A protective coating is applied to the first side, with exemplary coatings including strontium-doped or calcium-doped lanthanum chromite. To produce the plate, Ni and Al powders are combined with the filler composition, compressed at a pressure of about 10,000-30,000 psi, and heated to about 600.degree.-1000.degree. C. The coating is then applied to the first side of the completed plate using liquid injection plasma deposition or other deposition techniques.

Lessing, Paul A. (Idaho Falls, ID)

1996-01-01T23:59:59.000Z

250

Catalytic bipolar interconnection plate for use in a fuel cell  

DOE Patents [OSTI]

A bipolar interconnection plate is described for use between adjacent fuel cell units in a stacked fuel cell assembly. Each plate is manufactured from an intermetallic composition, examples of which include NiAl or Ni{sub 3}Al which can catalyze steam reforming of hydrocarbons. Distributed within the intermetallic structure of the plate is a ceramic filler composition. The plate includes a first side with gas flow channels therein and a second side with fuel flow channels therein. A protective coating is applied to the first side, with exemplary coatings including strontium-doped or calcium-doped lanthanum chromite. To produce the plate, Ni and Al powders are combined with the filler composition, compressed at a pressure of about 10,000--30,000 psi, and heated to about 600--1000 C. The coating is then applied to the first side of the completed plate using liquid injection plasma deposition or other deposition techniques. 6 figs.

Lessing, P.A.

1996-03-05T23:59:59.000Z

251

Behavior of plate trunnions subjected to shear loads  

SciTech Connect (OSTI)

The use of fabricated trunnions in heavy lift installation of offshore and marine structures is becoming widespread. This paper presents the results of a parametric study, with systematic variation of relevant geometric parameters, on the elasto-plastic responses of plate trunnions subjected to shear loads from the sling eyes. Two distinctive failure modes, associated with main plate dominated and shear plate/trunnion pipe dominated responses are identified and the corresponding results summarized. A proportional limit load, P{sub yl}, is defined for each specimen based on its load-displacement response. It is observed that a plate trunnion possesses significant reserve strength beyond its limit load and that current industry practice, which considers the shear plate only to transfer the total sling load into the main plate, is overly conservative.

Choo, Y.S.; Padmanaban, K.; Shanmugam, N.E.; Liew, J.Y.R. [National Univ. of Singapore (Singapore). Faculty of Engineering

1995-12-31T23:59:59.000Z

252

E-Print Network 3.0 - amorphous selenium flat-panel Sample Search...  

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

22 Licensable Technologies Summary: 12;Licensable Technologies Applications: n Solar Cells n Sensors n Flat Panels n IC Circuits... and low-performance, low-cost...

253

amorphous silicon flat-panel: Topics by E-print Network  

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

5 Asymmetric Electrical Properties of Half Corbino Hydrogenated Amorphous Silicon Thin-Film Transistor and Its Applications to Flat Panel Displays Materials Science...

254

Flat space cosmologies in two dimensions - Phase transitions and asymptotic mass-domination  

E-Print Network [OSTI]

We study flat space cosmologies in two dimensions by taking the flat space limit of the Achucarro-Ortiz model. We unravel a phase transition between hot flat space and flat space cosmologies, and derive a new dilaton-dependent counterterm required for the consistency of the Euclidean partition function. Our results generalize to asymptotically mass-dominated 2-dimensional dilaton gravity models, whose thermodynamical properties we discuss. The novel case of asymptotic mass-domination is neither covered by the comprehensive discussion of hep-th/0703230 nor by the more recent generalization to dilaton gravity with confining U(1) charges in 1406.7007.

Arjun Bagchi; Daniel Grumiller; Jakob Salzer; Sourav Sarkar; Friedrich Schöller

2014-08-22T23:59:59.000Z

255

Tests of a Novel Design of Resistive Plate Chambers  

E-Print Network [OSTI]

A novel design of Resistive Plate Chambers (RPCs), using only a single resistive plate, is being proposed. Based on this design, two large size prototype chambers were constructed and were tested with cosmic rays and in particle beams. The tests confirmed the viability of this new approach. In addition to showing an improved single-particle response compared to the traditional 2-plate design, the novel chambers also prove to be suitable for calorimetric applications.

Bilki, B; Freund, B; Neubüser, C; Onel, Y; Repond, J; Schlereth, J; Xia, L

2015-01-01T23:59:59.000Z

256

Investigation of metallic bipolar plates for PEM fuel cells.  

E-Print Network [OSTI]

?? High cost and a short lifetime are the two main reasons why the PEM fuel cell is yet to be commercialized. The bipolar plate… (more)

Lćdre, Sigrid

2011-01-01T23:59:59.000Z

257

The StarScan plate measuring machine: overview and calibrations  

E-Print Network [OSTI]

The StarScan machine at the U.S. Naval Observatory (USNO) completed measuring photographic astrograph plates to allow determination of proper motions for the USNO CCD Astrograph Catalog (UCAC) program. All applicable 1940 AGK2 plates, about 2200 Hamburg Zone Astrograph plates, 900 Black Birch (USNO Twin Astrograph) plates, and 300 Lick Astrograph plates have been measured. StarScan comprises of a CCD camera, telecentric lens, air-bearing granite table, stepper motor screws, and Heidenhain scales to operate in a step-stare mode. The repeatability of StarScan measures is about 0.2 micrometer. The CCD mapping as well as the global table coordinate system has been calibrated using a special dot calibration plate and the overall accuracy of StarScan x,y data is derived to be 0.5 micrometer. Application to real photographic plate data shows that position information of at least 0.65 micrometer accuracy can be extracted from course grain 103a-type emulsion astrometric plates. Transformations between "direct" and "reverse" measures of fine grain emulsion plate measures are obtained on the 0.3 micrometer level per well exposed stellar image and coordinate, which is at the limit of the StarScan machine.

Norbert Zacharias; Lars Winter; Ellis Holdenried; Jean-Pierre de Cuyper; Ted Rafferty; Gary Wycoff

2008-06-02T23:59:59.000Z

258

Perspective on plating for precision finishing  

SciTech Connect (OSTI)

This paper is intended as an overview on platings for precision finishing operations. After a brief review of the two processes (polishing and precision machining) by which a coating on a part can be converted to a precision surface, the coatings which work successfully in these applications will be discussed. Then adhesion and stress aspects of deposits will be covered. Electroless nickel, which is a particularly attractive coating for precision finishing applications, will be discussed in some detail, from its early years as the Kanigen'' process to the present. Since microstructural changes in deposits are important for precision parts, this aspect will be covered for electroless nickel, copper and silver deposits. Lastly, some words will be directed at potential future electrodeposited coatings including nickel-phosphorus alloys, and various silver alloys. 41 refs., 16 figs., 1 tab.

Dini, J.W.

1991-04-01T23:59:59.000Z

259

Microstructural evolution of U(Mo)–Al(Si) dispersion fuel under irradiation – Destructive analyses of the LEONIDAS E-FUTURE plates  

SciTech Connect (OSTI)

Several irradiation experiments have confirmed the positive effect of adding Si to the matrix of an U(Mo) dispersion fuel plate on its in-pile irradiation behavior. E-FUTURE, the first experiment of the LEONIDAS program, was performed to select an optimum Si concentration and fuel plate heat treatment parameters for further qualification. It consisted of the irradiation of 4 distinct (regarding Si content and heat treatments), full size flat fuel plates in the BR2 reactor under bounding conditions (470 W/cm2 peak BOL power, approximately 70% peak burn-up). After the irradiation, the E-FUTURE plates were examined non-destructively and found to have pillowed in the highest burn-up positions. The destructive post-irradiation examination confirmed that the fuel evolves in a stable way up to a burn-up of 60%235U. Even in the deformed area (pillow) the U(Mo) fuel itself shows stable behavior and remaining matrix material was present. From the calculation of the volume fractions, the positive effect of a higher Si amount added to the matrix and the higher annealing temperature can be derived.

A. Leenaers; S. Van den Berghe; J. Van Eyken; E. Koonen; F. Charollais; P. Lemoine; Y. Calzavara; H. Guyon; C. Jarousse; D. Geslin; D. Wachs; D. Keiser; A. Robinson; G. Hofman; Y. S. Kim

2013-10-01T23:59:59.000Z

260

Geothermal Casimir phenomena for the sphere-plate and cylinder-plate configurations  

E-Print Network [OSTI]

We investigate the nontrivial interplay between geometry and temperature in the Casimir effect for the sphere-plate and cylinder-plate configurations. At low temperature, the thermal contribution to the Casimir force is dominated by this interplay, implying that standard approximation techniques such as the PFA are inapplicable even in the limit of small surface separation. Thermal fluctuations on scales of the thermal wavelength lead to a delocalization of the thermal force density at low temperatures. As a consequence, the temperature dependence strongly differs from naive expectations. Most prominently, thermal forces can develop non-monotonic behavior below a critical temperature. We perform a comprehensive study of such geothermal phenomena in these Casimir geometries, using analytical and numerical worldline techniques for Dirichlet scalar fluctuations.

Alexej Weber; Holger Gies

2010-03-17T23:59:59.000Z

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


261

Geothermal Casimir phenomena for the sphere-plate and cylinder-plate configurations  

E-Print Network [OSTI]

We investigate the nontrivial interplay between geometry and temperature in the Casimir effect for the sphere-plate and cylinder-plate configurations. At low temperature, the thermal contribution to the Casimir force is dominated by this interplay, implying that standard approximation techniques such as the PFA are inapplicable even in the limit of small surface separation. Thermal fluctuations on scales of the thermal wavelength lead to a delocalization of the thermal force density at low temperatures. As a consequence, the temperature dependence strongly differs from naive expectations. Most prominently, thermal forces can develop non-monotonic behavior below a critical temperature. We perform a comprehensive study of such geothermal phenomena in these Casimir geometries, using analytical and numerical worldline techniques for Dirichlet scalar fluctuations.

Weber, Alexej

2010-01-01T23:59:59.000Z

262

Late Quaternary geomorphology and soils in Crater Flat, Yucca Mountain area, southern Nevada  

E-Print Network [OSTI]

Late Quaternary geomorphology and soils in Crater Flat, Yucca Mountain area, southern Nevada for a Crater Flat cation-leaching curve. This curve differs somewhat from a previous Yucca Mountain curve­10 from a previous ``surficial deposits'' stratigraphy used in the Yucca Mountain area. Although

Dorn, Ron

263

FOREST-AIR FLUXES OF CARBON, WATER AND ENERGY OVER NON-FLAT TERRAIN  

E-Print Network [OSTI]

FOREST-AIR FLUXES OF CARBON, WATER AND ENERGY OVER NON-FLAT TERRAIN XUHUI LEE and XINZHANG HU-air exchange of carbon, water, and energy was conducted at a mid-latitude, mixed forest on non-flat terrain to address this question, we conducted a field experiment on energy and carbon exchanges in a mixed forest

Lee, Xuhui

264

Holographic Dark Energy with Time Varying n^2 Parameter in Non-Flat Universe  

E-Print Network [OSTI]

We consider a holographic dark energy model, with a varying parameter, n, which evolves slowly with time. We obtain the differential equation describing evolution of the dark energy density parameter, $\\Omega_d$, for the flat and non-flat FRW universes. The equation of state parameter in this generalized version of holographic dark energy depends on n.

Bushra Majeed; Mubasher Jamil; Azad A. Siddiqui

2014-11-01T23:59:59.000Z

265

Self-Assembly of Flat Micro Components by Capillary Forces and Shape Recognition  

E-Print Network [OSTI]

Self-Assembly of Flat Micro Components by Capillary Forces and Shape Recognition J. Fang, S. Liang, K. Wang, X. Xiong, K. F. Böhringer* This paper summarizes our recent reports on self-assembly of flat micro components based on two major mechanisms: capillary-driven self-assembly and feature

266

A survey for high-redshift radio-loud quasars: optical spectroscopy of S > 0.2 Jy, flat-spectrum radio sources  

E-Print Network [OSTI]

We present optical spectroscopic data for a complete sample of 161 S_5GHz >= 0.2 Jy, flat-spectrum radio sources. The sources were observed as part of a survey for high redshift, radio-loud quasars, and were selected for spectroscopic follow-up based on criteria of red optical colour and unresolved optical counterpart, as measured from APM scans of POSS-I plates. 13 objects from the spectroscopic sample were found to be radio-loud quasars with z > 3, of which two were previously known. We give positions, E (red) magnitudes, O-E colours, 5GHz radio fluxes, radio spectral indices, optical spectra and redshifts where possible for the spectroscopic sample. We also give finding charts for the z > 3 QSOs. The highest redshift object found is a QSO with z = 4.30 (GB1508+5714, the subject of an earlier Letter). The sample also contains a z = 3.05 QSO, GB1759+7539, which is optically very luminous (E=16.1). In addition, spectra are given for 18 S_5GHz >= 0.2 Jy, flat-spectrum radio sources that do not form part of the complete sample.

I. M. Hook; R. G. McMahon; M. J. Irwin; C. Hazard

1996-08-20T23:59:59.000Z

267

Heterogeneous cavitation in liquid helium 4 near a glass plate  

E-Print Network [OSTI]

Heterogeneous cavitation in liquid helium 4 near a glass plate X. Chavanne, S. Balibar and F wave to study cavitation, i.e. the nucleation of bubbles, in liquid helium 4 near a clean glass plate and threshold pressures in the range 0 to -3 bar, significantly less negative than for homogeneous cavitation

Caupin, Frédéric

268

Seismic equipment qualification at Rocky Flats Plant: Lessons learned  

SciTech Connect (OSTI)

Seismic equipment qualification is being evaluated as a part of the Systematic Evaluation Program (SEP) at Rocky Flats Plant (RFP). Initially it was believed that the experience database developed by the Seismic Qualification Utility Group (SQUG) for commercial nuclear power plants, as outlined in their Generic Implementation Procedure (GIP), would provide a substantial benefit for the seismic adequacy verification of equipment at RFP. However, further review of the simplified guidelines contained in the GIP with respect to the specific RFP structures and components revealed substantial differences from the GIP criteria. Therefore, the number of ``outliers`` from the experience database defined in the GIP is greater than was initially anticipated. This paper presents details of the differences found between the RFP structures and components and those represented in the GIP, and the challenges presented for their evaluation at RFP. Approaches necessary to develop seismic verification data are also discussed. The discussions focus on experience with one of the nuclear facilities at RFP, Building 707. However, the conclusions are generally applicable to other similar facilities that typically comprise the RFP nuclear facilities.

Peregoy, W.; Herring, K.

1993-08-01T23:59:59.000Z

269

Universe Evolution in a 5D Ricci-flat Cosmology  

E-Print Network [OSTI]

We use Wetterich's parameterization equation of state (EOS) of dark energy to a $5D$ Ricci-flat cosmological solution and we suppose the universe contains three major components: matter, radiation and dark energy. By using the relation between the scale factor and the redshift $z$, we show that the two arbitrary functions contained in the $5D$ solution could be solved out analytically in terms of the variable $z$. Thus the whole $5D$ solution could be constructed uniquely if the current values of the three density parameters $\\Omega_{m0}$, ${\\Omega_{r0}}$, $\\Omega_{x0}$, the EOS $w_{0}$%, and the bending parameter $b$ contained in the EOS are all known. Furthermore, we find that all the evolutions of the mass density $\\Omega_{m} $, the radiation density ${\\Omega_{r}}$, the dark energy density $\\Omega_{x}$, and the deceleration parameter $q$ depend on the bending parameter $b$ sensitively. Therefore it is deserved to study observational constraints on the bending parameter $b$.

Chengwu Zhang; Hongya Liu; Lixin Xu; P. S. Wesson

2006-03-02T23:59:59.000Z

270

Environmental Survey preliminary report, Rocky Flats Plant, Golden, Colorado  

SciTech Connect (OSTI)

This report presents the preliminary findings of the Environmental Survey of the United States Department of Energy (DOE), Rocky Flats Plant (RFP), conducted August 11 through 22, 1986. The Survey is being conducted by an multidisciplinary team of environmental specialists, led and managed by the Office of Environment, Safety and Health's Office of Environmental Audit. Individual team members are outside experts supplied by a private contractor. The objective of the Survey is to identify environmental problems and areas of environmental risk associated with the RFP. The Survey covers all environmental media and all areas of environmental regulations. It is being performed in accordance with the DOE Environmental Survey Manual. The on-site phase of the Survey involves the review of existing site environmental data observations of the operations carried on at RFP, and interviews with site personnel. The Survey team developed a Sampling and Analysis Plan to assist in further assessing certain environmental problems identified during its on-site activates. The Sampling and Analysis Plan is being executed by DOE's Oak Ridge National Laboratory. When completed, the results will be incorporated into the RFP Environmental Survey Interim Report. The Interim Report will reflect the final determinations of the RFP Survey. 75 refs., 24 figs., 33 tabs.

Not Available

1987-06-01T23:59:59.000Z

271

Technical Safety Appraisal of the Rocky Flats Plant  

SciTech Connect (OSTI)

This report provides the results of a Technical Safety Appraisal (TSA) of the Rocky Flats Plant (RFP) conducted November 14 to 18 and November 28 to December 9, 1988. This appraisal covered the effectiveness and improvements in the RFP safety program across the site, evaluating progress to date against standards of accepted practice. The appraisal included coverage of the timeliness and effectiveness of actions taken in response to the recommendations/concerns in three previous Technical Safety Appraisals (TSAs) of RFP Bldg. 707 conducted in July 1986, Bldgs. 771/774 conducted in October/November 1986, and Bldgs. 776/777 conducted in January/February 1988. Results of this appraisal are given in Section IV for each of 14 technical safety areas at RFP. These results include a discussion, conclusions and any new safety concerns for each technical safety area. Appendix A contains a description of the system for categorizing concerns, and the concerns are tabulated in Appendix B. Appendix C reports on the evaluation of the contractor's actions and the current status of each of the 230 recommendations and concerns contained in the three previous TSA reports.

Brown, Blake P.

1989-01-01T23:59:59.000Z

272

DISPOSITION PATHS FOR ROCKY FLATS GLOVEBOXES: EVALUATING OPTIONS  

SciTech Connect (OSTI)

The Kaiser-Hill Company, LLC has the responsibility for closure activities at the Rocky Flats Environmental Technology Site (RFETS). One of the challenges faced for closure is the disposition of radiologically contaminated gloveboxes. Evaluation of the disposition options for gloveboxes included a detailed analysis of available treatment capabilities, disposal facilities, and lifecycle costs. The Kaiser-Hill Company, LLC followed several processes in determining how the gloveboxes would be managed for disposition. Currently, multiple disposition paths have been chosen to accommodate the needs of the varying styles and conditions of the gloveboxes, meet the needs of the decommissioning team, and to best manage lifecycle costs. Several challenges associated with developing a disposition path that addresses both the radiological and RCRA concerns as well as offering the most cost-effective solution were encountered. These challenges included meeting the radiological waste acceptance criteria of available disposal facilities, making a RCRA determination, evaluating treatment options and costs, addressing void requirements associated with disposal, and identifying packaging and transportation options. The varying disposal facility requirements affected disposition choices. Facility conditions that impacted decisions included radiological and chemical waste acceptance criteria, physical requirements, and measurement for payment options. The facility requirements also impacted onsite activities including management strategies, decontamination activities, and life-cycle cost.

Lobdell, D.; Geimer, R.; Larsen, P.; Loveland, K.

2003-02-27T23:59:59.000Z

273

Impact of graphene coating on the atom-plate interaction  

E-Print Network [OSTI]

Using the recently proposed quantum electrodynamical formalism, we calculate the Casimir-Polder free energies and forces between the ground state atoms of Rb, Na, Cs and He${}^{\\ast}$ and the plates made of Au, Si, sapphire and fused silica coated with a graphene sheet. It is shown that the graphene coating has no effect on the Casimir-Polder interaction for metallic plates, but influences significantly for plates made of dielectric materials. The influence of graphene coating increases with decreasing static dielectric permittivity of the plate material and the characteristic frequency of an atomic dynamic polarizability. Simple analytic expressions for the classical limit of the Casimir-Polder free energy and force between an atom and a graphene-coated plate are obtained. From the comparison with the results of numerical computations, the application region of these expressions is determined.

G. L. Klimchitskaya; V. M. Mostepanenko

2014-06-23T23:59:59.000Z

274

Cosmic constraint on unified model of dark sectors in flat and non-flat varying gravitational constant theory  

E-Print Network [OSTI]

Observations indicate that most universal matter are invisible and gravitational constant $G(t)$ maybe depends on the time. The theory of variation of $G$ (VG) is explored in this paper, with naturally resulting to the invisible components in universe. We utilize the observational data: lookback time data, model-independent gamma ray bursts data, growth function of matter linear perturbations, type Ia supernovae data with systematic errors, cosmic microwave background, and baryon acoustic oscillation data from the radial scale measurement and the peak-positions measurement, to restrict the unified model (UM) of dark components in VG theory. Using the best-fit values of parameters with the covariance matrix, constraints on the variation of $G$ are $(\\frac{G}{G_{0}})_{z=3.5}\\simeq 1.0003^{+0.0014}_{-0.0016}$ and $(\\frac{\\dot{G}}{G})_{today}\\simeq 0.7977^{+2.3566}_{-2.3566}\\times 10^{-13} yr^{-1}$ in a flat geometry, the small uncertainties around constants. Limit on equation of state of dark matter is $w_{0dm}=...

Lu, Jianbo; Wu, Yabo; Xu, Lixin

2015-01-01T23:59:59.000Z

275

Investigation Of The Friction Factor Behavior for Flat Plate Tests Of Smooth And Roughened Surfaces With Supply Pressures Up To 84 Bars  

E-Print Network [OSTI]

friction factor data and measure dynamic pressure oscillations. A detailed description of the test facility is described, and a theory for determining the friction factor is reviewed. Three clearances were investigated: 0.635, 0.381, and 0.254 mm. Tests...

Kheireddin, Bassem A.

2010-10-12T23:59:59.000Z

276

Proceedings of the flat-plate solar array project workshop on low-cost polysilicon for terrestrial photovoltaic solar-cell applications  

SciTech Connect (OSTI)

Separate abstracts were prepared for 21 papers in this workshop proceedings. Topics covered include: polysilicon material requirements; economics; process developments in the USA and internationally; and the polysilicon market and forecasts. (LEW)

Not Available

1986-02-01T23:59:59.000Z

277

Technical safety appraisal: Buildings 776/777 Rocky Flats Plant  

SciTech Connect (OSTI)

Buildings 776/777 at the Rocky Flats Plant are major components of the production complex at the plant site. They have been in operation since 1957. The operations taking place in the buildings are nuclear weapons production support, processing of weapons assemblies returned from Pantex, waste processing, research and development in support of production, special projects, and those generated by support groups, such as maintenance. The appraisal team identified nine deficiencies that it believed required prompt attention. DOE management for EH, the program office (Defense Programs), and the field office analyzed the information provided by the appraisal team and instituted compensatory measures for closer monitoring of contractor activities by knowledgeable DOE staff and staff from other sites. Concurrently, the contractor was requested to address both short-term and long-term remedial measures to correct the identified issues as well as the underlying problems. The contractor has provided his action plan, which is included. This plan was under evaluation by EH and the DOE program office at the time this report was prepared. In addressing the major areas of concern identified above, a well as the specific deficiencies identified by the appraisal team, the contractor and the field office are cautioned to search for the root causes for the problems and to direct corrective actions to those root causes rather than solely to the symptoms to assure the sustainability of the improvements being made. The results of prior TSAs led DOE to conclude that previous corrective actions were not sufficient in that a large number of the individual findings are recurrent. Pending completion of remedial actions over the next few months, enhanced DOE oversight of the contractor is warranted.

Field, H C

1988-03-01T23:59:59.000Z

278

Formation of compressed flat electron beams with high transverse-emittance ratios  

SciTech Connect (OSTI)

Flat beams—beams with asymmetric transverse emittances—have important applications in novel light-source concepts and advanced-acceleration schemes and could possibly alleviate the need for damping rings in lepton colliders. Over the last decade, a flat beam generation technique based on the conversion of an angular-momentum-dominated beam was proposed and experimentally tested. In this paper we explore the production of compressed flat beams. We especially investigate and optimize the flat beam transformation for beams with substantial fractional energy spread. We use as a simulation example the photoinjector of Fermilab’s Advanced Superconducting Test Accelerator. The optimizations of the flat beam generation and compression at Advanced Superconducting Test Accelerator were done via start-to-end numerical simulations for bunch charges of 3.2 nC, 1.0 nC, and 20 pC at ?37??MeV. The optimized emittances of flat beams with different bunch charges were found to be 0.25???m (emittance ratio is ?400), 0.13????m, 15 nm before compression, and 0.41???m, 0.20???m, 16 nm after full compression, respectively, with peak currents as high as 5.5 kA for a 3.2?nC flat beam. These parameters are consistent with requirements needed to excite wakefields in asymmetric dielectric-lined waveguides or produce significant photon flux using small-gap micro-undulators.

Zhu, J. [Fermilab; Institute of Fluid Physics, CAEP, China; Piot, P. [Northern Illinois University; Fermilab; Mihalcea, D. [Northern Illinois University; Prokop, C. R. [Northern Illinois University

2014-08-01T23:59:59.000Z

279

Seismic tomography constraints on reconstructing the Philippine Sea Plate and its margin  

E-Print Network [OSTI]

The Philippine Sea Plate has been surrounded by subduction zones throughout Cenozoic time due to the convergence of the Eurasian, Pacific and Indian-Australian plates. Existing Philippine Sea Plate reconstructions have been made based primarily...

Handayani, Lina

2005-02-17T23:59:59.000Z

280

Effect of polyurea on dynamic response and fracture resistance of steel plates under impulsive loads  

E-Print Network [OSTI]

on the dynamic response of steel plates, 2006 SEM AnnualPenetration protection of steel plates with polyurea layer,the post-failure motion of steel plates subjected to blast

Amini, Mahmoud Reza

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


281

Seafloor geodetic measurements and modeling of Nazca-South America plate convergence  

E-Print Network [OSTI]

3. Nazca-South America plate convergence . II GPS-acousticIII.2: Nazca-South America plate convergenceDecelerat- ing Naza-South America and Nazca-Pac?c plate

Gagnon, Katie L.

2007-01-01T23:59:59.000Z

282

Perforated plates for cryogenic regenerators and method of fabrication  

DOE Patents [OSTI]

Perforated plates (10) having very small holes (14) with a uniform diameter throughout the plate thickness are prepared by a "wire drawing" process in which a billet of sacrificial metal is disposed in an extrusion can of the plate metal, and the can is extruded and restacked repeatedly, converting the billet to a wire of the desired hole diameter. At final size, the rod is then sliced into wafers, and the wires are removed by selective etching. This process is useful for plate metals of interest for high performance regenerator applications, in particular, copper, niobium, molybdenum, erbium, and other rare earth metals. Er.sub.3 Ni, which has uniquely favorable thermophysical properties for such applications, may be incorporated in regions of the plates by providing extrusion cans (20) containing erbium and nickel metals in a stacked array (53) with extrusion cans of the plate metal, which may be copper. The array is heated to convert the erbium and nickel metals to Er.sub.3 Ni. Perforated plates having two sizes of perforations (38, 42), one of which is small enough for storage of helium, are also disclosed.

Hendricks, John B. (Huntsville, AL)

1994-01-01T23:59:59.000Z

283

Large-Area Zone Plate Fabrication with Optical Lithography  

SciTech Connect (OSTI)

Zone plates as condenser optics for x-ray microscopes offer simple optical designs for both illumination and spectral resolution when used as a linear monochromator. However, due to the long write times for electron beam lithography, both the availability and the size of zone plates for condensers have been limited. Since the resolution provided by the linear monochromator scales almost linearly with the diameter of the zone plate, the full potential for zone plate monochromators as illumination systems for x-ray microscopes has not been achieved. For example, the 10-mm-diameter zone plate has demonstrated a spectral resolution of E/{Delta}E = 700[1], but with a 26-mm-diameter zone plate, the calculated spectral resolution is higher than E/{Delta}E = 3000. These large-area zone plates are possible to fabricate with the leading edge semiconductor lithography tools such as those available at the College of Nanoscale Science and Engineering at the University at Albany. One of the lithography tools available is the ASML TWINSCAN XT: 1950i with 37-nm resolution [2]. A single 300-mm wafer can contain more than 60 fields, each with a large area condenser, and the throughput of the tool can be more than one wafer every minute.

Denbeaux, G. [College of Nanoscale Science and Engineering, University at Albany, 255 Fuller Road, Albany, NY 12203 (United States)

2011-09-09T23:59:59.000Z

284

Perforated plates for cryogenic regenerators and method of fabrication  

DOE Patents [OSTI]

Perforated plates having very small holes with a uniform diameter throughout the plate thickness are prepared by a [open quotes]wire drawing[close quotes] process in which a billet of sacrificial metal is disposed in an extrusion can of the plate metal, and the can is extruded and restacked repeatedly, converting the billet to a wire of the desired hole diameter. At final size, the rod is then sliced into wafers, and the wires are removed by selective etching. This process is useful for plate metals of interest for high performance regenerator applications, in particular, copper, niobium, molybdenum, erbium, and other rare earth metals. Er[sub 3]Ni, which has uniquely favorable thermophysical properties for such applications, may be incorporated in regions of the plates by providing extrusion cans containing erbium and nickel metals in a stacked array with extrusion cans of the plate metal, which may be copper. The array is heated to convert the erbium and nickel metals to Er[sub 3]Ni. Perforated plates having two sizes of perforations, one of which is small enough for storage of helium, are also disclosed. 10 figures.

Hendricks, J.B.

1994-03-29T23:59:59.000Z

285

Conductivity fuel cell collector plate and method of fabrication  

DOE Patents [OSTI]

An improved method of manufacturing a PEM fuel cell collector plate is disclosed. During molding a highly conductive polymer composite is formed having a relatively high polymer concentration along its external surfaces. After molding the polymer rich layer is removed from the land areas by machining, grinding or similar process. This layer removal results in increased overall conductivity of the molded collector plate. The polymer rich surface remains in the collector plate channels, providing increased mechanical strength and other benefits to the channels. The improved method also permits greater mold cavity thickness providing a number of advantages during the molding process.

Braun, James C. (Juno Beach, FL)

2002-01-01T23:59:59.000Z

286

Oxidation studies of CrAlON nanolayered coatings on steel plates...  

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

coatings on steel plates. Abstract: The requirements of low cost and high-temperature corrosion resistance for bipolar interconnect plates in solid oxide fuel cell stacks have...

287

E-Print Network 3.0 - aluminum plate spent Sample Search Results  

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

Diode Laser 77 Top View Side View Aluminum damping plate Aluminum base plate Thermoelectric cooler... was attached to an ... Source: Steck, Daniel A. - Oregon Center for...

288

E-Print Network 3.0 - american-caribbean plate boundary Sample...  

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

American-Caribbean plate boundary, asthenospheric flow... along the margin of northern South America accommodating east-west South American-Caribbean plate motion... - Caribbean...

289

Evaluation of Vitrification Processing Step for Rocky Flats Incinerator Ash  

SciTech Connect (OSTI)

In 1997, Pacific Northwest National Laboratory (PNNL) staff developed a processing option for incinerator ash at the Rocky Flats Environmental Technology Sites (RFETS). This work was performed with support from Los Alamos National Laboratory (LANL) and Safe Sites of Colorado (SSOC). A description of the remediation needs for the RFETS incinerator ash is provided in a report summarizing the recommended processing option for treatment of the ash (Lucy et al. 1998). The recommended process flowsheet involves a calcination pretreatment step to remove carbonaceous material followed by a vitrification processing step for a mixture of glass tit and calcined incinerator ash. Using the calcination pretreatment step to remove carbonaceous material reduced process upsets for the vitrification step, allowed for increased waste loading in the final product, and improved the quality of the final product. Figure 1.1 illustrates the flow sheet for the recommended processing option for treatment of RFETS incinerator ash. In 1998, work at PNNL further developed the recommended flow sheet through a series of studies to better define the vitrification operating parameters and to address secondary processing issues (such as characterizing the offgas species from the calcination process). Because a prototypical rotary calciner was not available for use, studies to evaluate the offgas from the calcination process were performed using a benchtop rotary calciner and laboratory-scale equipment (Lucy et al. 1998). This report focuses on the vitrification process step after ash has been calcined. Testing with full-scale containers was performed using ash surrogates and a muffle furnace similar to that planned for use at RFETS. Small-scale testing was performed using plutonium-bearing incinerator ash to verify performance of the waste form. Ash was not obtained from RFETS because of transportation requirements to calcine the incinerator ash prior to shipment of the material. Because part of PNNL's work was to characterize the ash prior to calcination and to investigate the effect of calcination on product quality, representative material was obtained from LANL. Ash obtained from LANL was selected based on its similarity to that currently stored at RFETS. The plutonium-bearing ashes obtained from LANL are likely from a RFETS incinerator, but the exact origin was not identified.

Wigent, W.L.; Luey, J.K.; Scheele, R.D.; Li, H.

1999-04-08T23:59:59.000Z

290

Method for regeneration of electroless nickel plating solution  

SciTech Connect (OSTI)

An electroless nickel(EN)/hypophosphite plating bath is provided employing acetic acid/acetate as a buffer and which is, as a result, capable of perpetual regeneration while avoiding the production of hazardous waste. A regeneration process is provided to process the spent EN plating bath solution. A concentrated starter and replenishment solution is provided for ease of operation of the plating bath. The regeneration process employs a chelating ion exchange system to remove nickel cations from spent EN plating solution. Phosphites are then removed from the solution by precipitation. The nickel cations are removed from the ion exchange system by elution with hypophosphorous acid and the nickel concentration of the eluate adjusted by addition of nickel salt. The treated solution and adjusted eluate are combined, stabilizer added, and the volume of resulting solution reduced by evaporation to form the bath starter and replenishing solution.

Eisenmann, Erhard T. (5423 Vista Sandia, NE., Albuquerque, NM 87111)

1997-01-01T23:59:59.000Z

291

Method for regeneration of electroless nickel plating solution  

SciTech Connect (OSTI)

An electroless nickel(EN)/hypophosphite plating bath is provided employing acetic acid/acetate as a buffer and which is, as a result, capable of perpetual regeneration while avoiding the production of hazardous waste. A regeneration process is provided to process the spent EN plating bath solution. A concentrated starter and replenishment solution is provided for ease of operation of the plating bath. The regeneration process employs a chelating ion exchange system to remove nickel cations from spent EN plating solution. Phosphites are then removed from the solution by precipitation. The nickel cations are removed from the ion exchange system by elution with hypophosphorus acid and the nickel concentration of the eluate adjusted by addition of nickel salt. The treated solution and adjusted eluate are combined, stabilizer added, and the volume of resulting solution reduced by evaporation to form the bath starter and replenishing solution. 1 fig.

Eisenmann, E.T.

1997-03-11T23:59:59.000Z

292

Next Generation Bipolar Plates for Automotive PEM Fuel Cells  

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

Bipolar Plates for Automotive PEM Fuel Cells (Topic 4) GrafTech International, Ltd. * Funding DOE Cost Share Recipient Cost Share TOTAL 2,325,943 581,486 2,907,429 80% 20% 100%...

293

Melt generation in the Earth's mantle at Convergent Plate Margins  

E-Print Network [OSTI]

The five geologic studies presented in this thesis document how the recycling of tectonic plates at subduction zones has a profound effect on the melting behavior of the Earth's mantle. Two experimental studies (Chapters ...

Till, Christy B

2011-01-01T23:59:59.000Z

294

Using Plate Heat Exchangers to Increase Energy Efficiency  

E-Print Network [OSTI]

"In recent years, there has been an increasing awareness of Plate Heat Exchangers (PHE's) in industrial processes around the world. While PHE's have historically been classified as compact heat exchangers, compactness is often a secondary advantage...

Bailey, K.

295

Conformally flat Einstein-Yang-Mills-Higgs solutions with spherical symmetry  

SciTech Connect (OSTI)

We solve the Einstein-Yang-Mills-Higgs equations in a conformally flat metric with spherical symmetry. Two solutions are obtained corresponding to magnetic monopoles in the Higgs vacuum and outside of it.

Mondaini, R.P.; Santos, N.O.

1983-10-15T23:59:59.000Z

296

Flat Quartz-Crystal X-ray Spectrometer for Nuclear Forensics Applications  

E-Print Network [OSTI]

structure. The higher energy background radiation was blocked from reaching the detector using a customized collimator and shielding system. A flat quartz-crystal x-ray spectrometer system was designed specifically to fit the constraints and requirements...

Goodsell, Alison

2012-10-19T23:59:59.000Z

297

Comparison and evaluation of turbulence estimation schemes at Rocky Flats Plant  

SciTech Connect (OSTI)

The Rocky Flats Plant (RFP) routinely measures meteorological data to support Air Quality and Emergency Response activities. These data help to characterize the transport and dispersion of actual or potential airborne releases of radionuclides or other hazardous materials.

Bowen, B.M.; Pamp, S.E.

1993-10-01T23:59:59.000Z

298

VWZ-0008- In the Matter of EG&G Rocky Flats, Inc.  

Broader source: Energy.gov [DOE]

This decision will consider a Motion for Partial Dismissal and Limitation on Scope of Complainant's Claims filed by EG&G Rocky Flats, Inc. (EG&G) on June 13, 1997. In its motion, EG&G...

299

EA-1146: Radioactive Waste Storage at Rocky Flats Environmental Technology Site, Golden, Colorado  

Broader source: Energy.gov [DOE]

This EA evaluates the environmental impacts of the proposal to convert buildings at the U.S. Department of Energy Rocky Flats Environmental Technology Site from their former uses to interim waste...

300

Methods of improving the surface flatness of thin glass sheets and silicon wafers  

E-Print Network [OSTI]

The manufacturing of high quality sheet glass has allowed for many technologies to advance to astonishing frontiers. With dimensions reaching ~ 3 x 3 m˛, sheet glass is pushing the envelope for producing massive size flat ...

Akilian, Mireille

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


301

Seismic fragility and retrofitting for a reinforced concrete flat-slab structure  

E-Print Network [OSTI]

The effectiveness of seismic retrofitting applied to enhance seismic performance was assessed for a five-story reinforced concrete (RC) flat-slab building structure in the central United States. In addition to this, an assessment of seismic...

Bai, Jong-Wha

2004-09-30T23:59:59.000Z

302

DOE's Rocky Flats Cleanup Site Named 2006 Project of the Year...  

Office of Environmental Management (EM)

U.S. Department of Energy (DOE) today announced that the Project Management Institute (PMI) has awarded its 2006 Project of the Year to DOE's Rocky Flats Environmental Technology...

303

Determination of plate efficiencies for conventional distillation columns  

E-Print Network [OSTI]

DETERMINATION OF PLATE EFFICIENCIES FOR CONVENTIONAL DISTILLATION COIUMNS A Thesis By Thomas Raymond Harris Submitted to the Graduate School of the Agricultural and Mechanical College of Texas in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE May 1962 Ma)or Sub)ect t Chemical Engineering DETERMINATION OF PLATE EFFICIENCIES FOR CONVENTIONAL DISTILLATION COLUMNS A Thesis Thomas Raymond Harris Approred as to style and content bye Chairman of ommittee Head...

Harris, Thomas Raymond

2012-06-07T23:59:59.000Z

304

Dynamic optimization of a plate reactor start-up  

E-Print Network [OSTI]

Dynamic optimization of a plate reactor start-up Staffan Haugwitz, Per Hagander and John Bagterp Jørgensen Lund-Lyngby-�lborg-dagen 061101 Staffan Haugwitz et al Control of a plate reactor #12;Process configurations : 2 inj. / 1 cool zone T T T T T T T T T T Reactor outletReactant A Reactant B Cooling water uB1 u

305

Aperture-based antihydrogen gravity experiment: Parallel plate geometry  

SciTech Connect (OSTI)

An analytical model and a Monte Carlo simulation are presented of an experiment that could be used to determine the direction of the acceleration of antihydrogen due to gravity. The experiment would rely on methods developed by existing antihydrogen research collaborations. The configuration consists of two circular, parallel plates that have an axis of symmetry directed away from the center of the earth. The plates are separated by a small vertical distance, and include one or more pairs of circular barriers that protrude from the upper and lower plates, thereby forming an aperture between the plates. Antihydrogen annihilations that occur just beyond each barrier, within a “shadow” region, are asymmetric on the upper plate relative to the lower plate. The probability for such annihilations is determined for a point, line and spheroidal source of antihydrogen. The production of 100,000 antiatoms is predicted to be necessary for the aperture-based experiment to indicate the direction of free fall acceleration of antimatter, provided that antihydrogen is produced within a sufficiently small antiproton plasma at a temperature of 4 K.

Rocha, J. R.; Hedlof, R. M.; Ordonez, C. A. [Department of Physics, University of North Texas, Denton, Texas 76203 (United States)] [Department of Physics, University of North Texas, Denton, Texas 76203 (United States)

2013-10-15T23:59:59.000Z

306

Idaho National Engineering Laboratory code assessment of the Rocky Flats transuranic waste  

SciTech Connect (OSTI)

This report is an assessment of the content codes associated with transuranic waste shipped from the Rocky Flats Plant in Golden, Colorado, to INEL. The primary objective of this document is to characterize and describe the transuranic wastes shipped to INEL from Rocky Flats by item description code (IDC). This information will aid INEL in determining if the waste meets the waste acceptance criteria (WAC) of the Waste Isolation Pilot Plant (WIPP). The waste covered by this content code assessment was shipped from Rocky Flats between 1985 and 1989. These years coincide with the dates for information available in the Rocky Flats Solid Waste Information Management System (SWIMS). The majority of waste shipped during this time was certified to the existing WIPP WAC. This waste is referred to as precertified waste. Reassessment of these precertified waste containers is necessary because of changes in the WIPP WAC. To accomplish this assessment, the analytical and process knowledge available on the various IDCs used at Rocky Flats were evaluated. Rocky Flats sources for this information include employee interviews, SWIMS, Transuranic Waste Certification Program, Transuranic Waste Inspection Procedure, Backlog Waste Baseline Books, WIPP Experimental Waste Characterization Program (headspace analysis), and other related documents, procedures, and programs. Summaries are provided of: (a) certification information, (b) waste description, (c) generation source, (d) recovery method, (e) waste packaging and handling information, (f) container preparation information, (g) assay information, (h) inspection information, (i) analytical data, and (j) RCRA characterization.

NONE

1995-07-01T23:59:59.000Z

307

Highly conductive, multi-layer composite precursor composition to fuel cell flow field plate or bipolar plate  

DOE Patents [OSTI]

This invention provides a moldable, multiple-layer composite composition, which is a precursor to an electrically conductive composite flow field plate or bipolar plate. In one preferred embodiment, the composition comprises a plurality of conductive sheets and a plurality of mixture layers of a curable resin and conductive fillers, wherein (A) each conductive sheet is attached to at least one resin-filler mixture layer; (B) at least one of the conductive sheets comprises flexible graphite; and (C) at least one resin-filler mixture layer comprises a thermosetting resin and conductive fillers with the fillers being present in a sufficient quantity to render the resulting flow field plate or bipolar plate electrically conductive with a conductivity no less than 100 S/cm and thickness-direction areal conductivity no less than 200 S/cm.sup.2.

Jang, Bor Z. (Centerville, OH); Zhamu, Aruna (Centerville, OH); Guo, Jiusheng (Centerville, OH)

2011-02-15T23:59:59.000Z

308

The Inverted Block Rate:The Inverted Block Rate: An Alternative to Flat Rate BillingAn Alternative to Flat Rate Billing  

E-Print Network [OSTI]

The Inverted Block Rate:The Inverted Block Rate: An Alternative to Flat Rate BillingAn Alternative;Inverted Block RateInverted Block Rate 22 IntroductionIntroduction ·· Modern societies rely on electrical collectionMetering and Rate Models facilitate collection #12;Inverted Block RateInverted Block Rate 33 Rate

Hughes, Larry

309

An elastic plate model for interseismic deformation in subduction Ravi V. S. Kanda1  

E-Print Network [OSTI]

the subducting and overriding plates, as well as zero net steady state vertical offset between the two plates, 1983]. The BSM accomplishes this zero net strain in the overriding plate by parameterizing interseismic case of zero plate thickness, thereby providing an alternative motivation for the BSM. The ESPM also

310

Ultrasonic measurement of the residual stresses in patch welded steel plates  

E-Print Network [OSTI]

, structural steel plates. The two 1.2 in (48 in.) square plates were patch welded in the center to create a residual stress field; and subsequently, one of the plates was stress relieved. The LCR travel-time measurements on the plates not only differentiated...

Junghans, Paul Gerard

1994-01-01T23:59:59.000Z

311

Low Cost PEM Fuel Cell Metal Bipolar Plates  

SciTech Connect (OSTI)

Bipolar plate is an important component in fuel cell stacks and accounts for more than 75% of stack weight and volume. The technology development of metal bipolar plates can effectively reduce the fuel cells stack weight and volume over 50%. The challenge is the metal plate corrosion protection at low cost for the broad commercial applications. This project is aimed to develop innovative technological solutions to overcome the corrosion barrier of low cost metal plates. The feasibility of has been demonstrated and patented (US Patent 7,309,540). The plan is to further reduce the cost, and scale up the technology. The project is built on three pillars: 1) robust experimental evidence demonstrating the feasibility of our technology, 2) a team that consists of industrial leaders in fuel cell stack application, design, and manufactures; 3) a low-risk, significant-milestone driven program that proves the feasibility of meeting program objectives The implementation of this project will reduce the fuel cell stack metal bipolar separator plate cost which accounts 15-21% of the overall stack cost. It will contribute to the market adoption of fuel cell technologies. In addition, this corrosion protection technology can be used similar energy devices, such as batteries and electrolyzers. Therefore, the success of the project will be benefit in broad markets.

Wang, Conghua [TreadStone Technologies, Inc.

2013-05-30T23:59:59.000Z

312

Results of irradiated cladding tests and clad plate experiments  

SciTech Connect (OSTI)

Two aspects critical to the fracture behavior of three-wire stainless steel cladding were investigated by the Heavy-Section Steel Technology (HSST) Program: (1) radiation effects on cladding strength and toughness, and (2) the response of mechanically loaded, flawed structures in the presence of cladding (clad plate experiments). Postirradiation testing results show that, in the test temperature range from /minus/125 to 288/degree/C, the yield strength increased, and ductility insignificantly increased, while there was almost no change in ultimate tensile strength. All cladding exhibited ductile-to-brittle transition behavior during Charpy impact testing. Radiation damage decreased the Charpy upper-shelf energy by 15 to 20% and resulted in up to 28/degree/C shifts of the Charpy impact transition temperature. Results of irradiated 12.5-mm-thick compact specimens (0.5TCS) show consistent decreases in the ductile fracture toughness, J/sub Ic/, and the tearing modulus. Results from clad plate tests have shown that (1) a tough surface layer composed of cladding and/or heat-affected zone has arrested running flaws under conditions where unclad plates have ruptured, and (2) the residual load-bearing capacity of clad plates with large subclad flaws significantly exceeded that of an unclad plate. 13 figs., 1 tab.

Haggag, F.M.; Iskander, S.K.

1988-01-01T23:59:59.000Z

313

Numerical analysis of laminar fluid flow and heat transfer in a parallel plate channel with normally in-line positioned plates  

E-Print Network [OSTI]

NUMERICAL ANALYSIS OF LAMINAR FLUID FLOW AND HEAT TRANSFER IN A PARALLEL PLATE CHANNEL WITH NORMALLY IN-LINE POSITIONED PLATES A Thesis by JOHN GRADY iVICMATH Submitted to the Office of Graduate Studies of Texas AkM University in partial... fulfillment of the requirements for the degree of MASTER OF SCIENCE December 1991 Major Subject: Mechanical Engineering NUMERICAL ANALYSIS OF LAMINAR FLUID FLOW AND HEAT TRANSFER IN A PARALLEL PLATE CHANNEI WITH NORMALLY IN-LINE POSITIONED PLATES A...

McMath, John Grady

2012-06-07T23:59:59.000Z

314

Stringy Stability of Charged Dilaton Black Holes with Flat Event Horizon  

E-Print Network [OSTI]

Electrically charged black holes with flat event horizon in anti-de Sitter space have received much attention due to various applications in Anti-de Sitter/Conformal Field Theory (AdS/CFT) correspondence, from modeling the behavior of quark-gluon plasma to superconductor. Crucial to the physics on the dual field theory is the fact that when embedded in string theory, black holes in the bulk may become vulnerable to instability caused by brane pair-production. Since dilaton arises naturally in the context of string theory, we study the effect of coupling dilaton to Maxwell field on the stability of flat charged AdS black holes. In particular, we study the stability of Gao-Zhang black holes, which are locally asymptotically anti-de Sitter. We find that for dilaton coupling parameter $\\alpha$ > 1, flat black holes are stable against brane pair production, however for 0 electrical charges is increased. Such instability however, behaves somewhat differently from that of flat Reissner-Nordstr\\"om black holes. In addition, we prove that the Seiberg-Witten action of charged dilaton AdS black hole of Gao-Zhang type with flat event horizon (at least in 5-dimension) is always logarithmically divergent at infinity for finite values of $\\alpha$, and is finite and positive in the case $\\alpha$ tends to infinity . We also comment on the robustness of our result for other charged dilaton black holes that are not of Gao-Zhang type.

Yen Chin Ong; Pisin Chen

2014-12-29T23:59:59.000Z

315

Hanford/Rocky Flats collaboration on development of supercritical carbon dioxide extraction to treat mixed waste  

SciTech Connect (OSTI)

Proposals for demonstration work under the Department of Energy`s Mixed Waste Focus Area, during the 1996 through 1997 fiscal years included two applications of supercritical carbon dioxide to mixed waste pretreatment. These proposals included task RF15MW58 of Rocky Flats and task RL46MW59 of Hanford. Analysis of compatibilities in wastes and work scopes yielded an expectation of substantial collaboration between sites whereby Hanford waste streams may undergo demonstration testing at Rocky Flats, thereby eliminating the need for test facilities at Hanford. This form of collaboration is premised the continued deployment at Rocky Flats and the capability for Hanford samples to be treated at Rocky Flats. The recent creation of a thermal treatment contract for a facility near Hanford may alleviate the need to conduct organic extraction upon Rocky Flats wastes by providing a cost effective thermal treatment alternative, however, some waste streams at Hanford will continue to require organic extraction. Final site waste stream treatment locations are not within the scope of this document.

Hendrickson, D.W.; Biyani, R.K. [Westinghouse Hanford Co., Richland, WA (United States); Brown, C.M.; Teter, W.L. [Kaiser-Hill Co., Golden, CO (United States)

1995-11-01T23:59:59.000Z

316

Laser-based characterization of nuclear fuel plates  

SciTech Connect (OSTI)

Ensuring the integrity of fuel-clad and clad-clad bonding in nuclear fuels is important for safe reactor operation and assessment of fuel performance, yet the measurement of bond strengths in actual fuels has proved challenging. The laser shockwave technique (LST) originally developed to characterize structural adhesion in composites is being employed to characterize interface strength in a new type of plate fuel being developed at Idaho National Laboratory (INL). LST is a non-contact method that uses lasers for the generation and detection of large-amplitude acoustic waves and is well suited for application to both fresh and irradiated nuclear-fuel plates. This paper will report on initial characterization results obtained from fresh fuel plates manufactured by different processes, including hot isostatic pressing, friction stir welding, and hot rolling.

Smith, James A.; Cottle, Dave L.; Rabin, Barry H. [Idaho National Laboratory, Fuel Performance and Design, P.O. Box 1625, Idaho Falls, Idaho, 83415-6188 (United States)

2014-02-18T23:59:59.000Z

317

Fuel cell repeater unit including frame and separator plate  

DOE Patents [OSTI]

An example fuel cell repeater includes a separator plate and a frame establishing at least a portion of a flow path that is operative to communicate fuel to or from at least one fuel cell held by the frame relative to the separator plate. The flow path has a perimeter and any fuel within the perimeter flow across the at least one fuel cell in a first direction. The separator plate, the frame, or both establish at least one conduit positioned outside the flow path perimeter. The conduit is outside of the flow path perimeter and is configured to direct flow in a second, different direction. The conduit is fluidly coupled with the flow path.

Yamanis, Jean; Hawkes, Justin R; Chiapetta, Jr., Louis; Bird, Connie E; Sun, Ellen Y; Croteau, Paul F

2013-11-05T23:59:59.000Z

318

Laser shockwave technique for characterization of nuclear fuel plate interfaces  

SciTech Connect (OSTI)

The US National Nuclear Security Agency is tasked with minimizing the worldwide use of high-enriched uranium. One aspect of that effort is the conversion of research reactors to monolithic fuel plates of low-enriched uranium. The manufacturing process includes hot isostatic press bonding of an aluminum cladding to the fuel foil. The Laser Shockwave Technique (LST) is here evaluated for characterizing the interface strength of fuel plates using depleted Uranium/Mo foils. LST is a non-contact method that uses lasers for the generation and detection of large amplitude acoustic waves and is therefore well adapted to the quality assurance of this process. Preliminary results show a clear signature of well-bonded and debonded interfaces and the method is able to classify/rank the bond strength of fuel plates prepared under different HIP conditions.

Perton, M.; Levesque, D.; Monchalin, J.-P.; Lord, M. [National Research Council Canada, 75 de Mortagne Blvd, Boucherville, Quebec, J4B 6Y4 (Canada); Smith, J. A.; Rabin, B. H. [Idaho National Laboratory, P.O. Box 1625, Idaho Falls, ID 83415-6188 (United States)

2013-01-25T23:59:59.000Z

319

Laser Shockwave Technique For Characterization Of Nuclear Fuel Plate Interfaces  

SciTech Connect (OSTI)

The US National Nuclear Security Agency is tasked with minimizing the worldwide use of high-enriched uranium. One aspect of that effort is the conversion of research reactors to monolithic fuel plates of low-enriched uranium. The manufacturing process includes hot isostatic press bonding of an aluminum cladding to the fuel foil. The Laser Shockwave Technique (LST) is here evaluated for characterizing the interface strength of fuel plates using depleted Uranium/Mo foils. LST is a non-contact method that uses lasers for the generation and detection of large amplitude acoustic waves and is therefore well adapted to the quality assurance of this process. Preliminary results show a clear signature of well-bonded and debonded interfaces and the method is able to classify/rank the bond strength of fuel plates prepared under different HIP conditions.

James A. Smith; Barry H. Rabin; Mathieu Perton; Daniel Lévesque; Jean-Pierre Monchalin; Martin Lord

2012-07-01T23:59:59.000Z

320

Laser-Based Characterization of Nuclear Fuel Plates  

SciTech Connect (OSTI)

Ensuring the integrity of fuel-clad and clad-clad bonding in nuclear fuels is important for safe reactor operation and assessment of fuel performance, yet the measurement of bond strengths in actual fuels has proved challenging. The laser shockwave technique (LST) originally developed to characterize structural adhesion in composites is being employed to characterize interface strength in a new type of plate fuel being developed at Idaho National Laboratory (INL). LST is a non-contact method that uses lasers for the generation and detection of large-amplitude acoustic waves and is well suited for application to both fresh and irradiated nuclear-fuel plates. This paper will report on initial characterization results obtained from fresh fuel plates manufactured by different processes, including hot isostatic pressing, friction stir welding, and hot rolling.

James A. Smith; David L. Cottle; Barry H. Rabin

2013-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


321

Scale-up of Carbon/Carbon Bipolar Plates  

SciTech Connect (OSTI)

This project was focused upon developing a unique material technology for use in PEM fuel cell bipolar plates. The carbon/carbon composite material developed in this program is uniquely suited for use in fuel cell systems, as it is lightweight, highly conductive and corrosion resistant. The project further focused upon developing the manufacturing methodology to cost-effectively produce this material for use in commercial fuel cell systems. United Technology Fuel Cells Corp., a leading fuel cell developer was a subcontractor to the project was interested in the performance and low-cost potential of the material. The accomplishments of the program included the development and testing of a low-cost, fully molded, net-shape carbon-carbon bipolar plate. The process to cost-effectively manufacture these carbon-carbon bipolar plates was focused on extensively in this program. Key areas for cost-reduction that received attention in this program was net-shape molding of the detailed flow structures according to end-user design. Correlations between feature detail and process parameters were formed so that mold tooling could be accurately designed to meet a variety of flow field dimensions. A cost model was developed that predicted the cost of manufacture for the product in near-term volumes and long-term volumes (10+ million units per year). Because the roduct uses lowcost raw materials in quantities that are less than competitive tech, it was found that the cost of the product in high volume can be less than with other plate echnologies, and can meet the DOE goal of $4/kW for transportation applications. The excellent performance of the all-carbon plate in net shape was verified in fuel cell testing. Performance equivalent to much higher cost, fully machined graphite plates was found.

David P. Haack

2009-04-08T23:59:59.000Z

322

Vibration of circular plates, of several thicknesses, with three supports  

E-Print Network [OSTI]

~ ~ ~ ~ ~ ~ e ~ o ~ ~ i Prccedure and DeeoriPt'alen Of APPSXat'aua ~ ~ e ~ a ~ 0 ~ ~ i EmPirioal Ccrrelabicn Of Dataa ~ ~ ~ 1 ~ ~ ~ 01 ~ ~ ~ ~ ~ ~ ~ ~ i Kathemat, ical Theory of Thin Plates ~ a ~ ~ ~ ~ ~ 1 ~ a ~ ~ ~ Heeultaa ~ ~ ~ ~ ~ a... (cps) e M = symmetric mode, ie. 1, 2, 3, and 4. h= thickness of circular plate, in, Vhen there are mox'e than-thoro variables involved in the x esult, s of an experimental research, an empirical xelat, ionsh1p concerning the several variables may...

Ballentine, John Richard

2012-06-07T23:59:59.000Z

323

Next Generation Bipolar Plates for Automotive PEM Fuel Cells  

SciTech Connect (OSTI)

The results of a successful U.S. Department of Energy (DoE) funded two-year $2.9 MM program lead by GrafTech International Inc. (GrafTech) are reported and summarized. The program goal was to develop the next generation of high temperature proton exchange membrane (PEM) fuel cell bipolar plates for use in transportation fuel cell applications operating at temperatures up to 120 °C. The bipolar plate composite developed during the program is based on GrafTech’s GRAFCELL? resin impregnated flexible graphite technology and makes use of a high temperature Huntsman Advanced Materials resin system which extends the upper use temperature of the composite to the DoE target. High temperature performance of the new composite is achieved with the added benefit of improvements in strength, modulus, and dimensional stability over the incumbent resin systems. Other physical properties, including thermal and electrical conductivity of the new composite are identical to or not adversely affected by the new resin system. Using the new bipolar plate composite system, machined plates were fabricated and tested in high temperature single-cell fuel cells operating at 120 °C for over 1100 hours by Case Western Reserve University. Final verification of performance was done on embossed full-size plates which were fabricated and glued into bipolar plates by GrafTech. Stack testing was done on a 10-cell full-sized stack under a simulated drive cycle protocol by Ballard Power Systems. Freeze-thaw performance was conducted by Ballard on a separate 5-cell stack and shown to be within specification. A third stack was assembled and shipped to Argonne National Laboratory for independent performance verification. Manufacturing cost estimate for the production of the new bipolar plate composite at current and high volume production scenarios was performed by Directed Technologies Inc. (DTI). The production cost estimates were consistent with previous DoE cost estimates performed by DTI for the DoE on metal plates. The final result of DTI’s analysis for the high volume manufacturing scenario ($6.85 /kW) came in slightly above the DoE target of $3 to $5/kW. This estimate was derived using a “Best Case Scenario” for many of the production process steps and raw material costs with projections to high volumes. Some of the process improvements assumed in this “Best Case Scenario” including high speed high impact forming and solvent-less resins, have not yet been implemented, but have a high probability of potential success.

Orest Adrianowycz; Julian Norley; David J. Stuart; David Flaherty; Ryan Wayne; Warren Williams; Roger Tietze; Yen-Loan H. Nguyen; Tom Zawodzinski; Patrick Pietrasz

2010-04-15T23:59:59.000Z

324

Optical processing furnace with quartz muffle and diffuser plate  

DOE Patents [OSTI]

An optical furnace for annealing a process wafer comprising a source of optical energy, a quartz muffle having a door to hold the wafer for processing, and a quartz diffuser plate to diffuse the light impinging on the quartz muffle; a feedback system with a light sensor located in the door or wall of the muffle is also provided for controlling the source of optical energy. The quartz for the diffuser plate is surface etched (to give the quartz diffusive qualities) in the furnace during a high intensity burn-in process.

Sopori, Bhushan L. (Denver, CO)

1995-01-01T23:59:59.000Z

325

Multi-well sample plate cover penetration system  

DOE Patents [OSTI]

An apparatus for penetrating a cover over a multi-well sample plate containing at least one individual sample well includes a cutting head, a cutter extending from the cutting head, and a robot. The cutting head is connected to the robot wherein the robot moves the cutting head and cutter so that the cutter penetrates the cover over the multi-well sample plate providing access to the individual sample well. When the cutting head is moved downward the foil is pierced by the cutter that splits, opens, and folds the foil inward toward the well. The well is then open for sample aspiration but has been protected from cross contamination.

Beer, Neil Reginald (Pleasanton, CA)

2011-12-27T23:59:59.000Z

326

THz-radiation production using dispersively-selected flat electron bunches  

E-Print Network [OSTI]

We propose an alternative scheme for a tunable THz radiation source generated by relativistic electron bunches. This technique relies on the combination of dispersive selection and flat electron bunch. The dispersive selection uses a slit mask inside a bunch compressor to transform the energy-chirped electron beam into a bunch train. The flat beam transformation boosts the frequency range of the THz source by reducing the beam emittance in one plane. This technique generates narrow-band THz radiation with a tuning range between 0.2 - 4 THz. Single frequency THz spectrum can also be generated by properly choosing the slit spacing, slit width, and the energy chirp.

Thangaraj, Jayakar

2013-01-01T23:59:59.000Z

327

Property:OpenEI/UtilityRate/FlatDemandMonth8 | 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 ResourcesLoadingPenobscotInformation Max Jump to:FlatDemandMonth3 Jump to:FlatDemandMonth8 Jump to:

328

Property:OpenEI/UtilityRate/FlatDemandMonth9 | 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 ResourcesLoadingPenobscotInformation Max Jump to:FlatDemandMonth3 Jump to:FlatDemandMonth8 Jump

329

Induced matter: Curved N-manifolds encapsulated in Riemann-flat N+1 dimensional space  

E-Print Network [OSTI]

Liko and Wesson have recently introduced a new 5-dimensional induced matter solution of the Einstein equations, a negative curvature Robertson-Walker space embedded in a Riemann flat 5-dimensional manifold. We show that this solution is a special case of a more general theorem prescribing the structure of certain N+1-dimensional Riemann flat spaces which are all solutions of the Einstein equations. These solutions encapsulate N-dimensional curved manifolds. Such spaces are said to "induce matter" in the sub-manifolds by virtue of their geometric structure alone. We prove that the N-manifold can be any maximally symmetric space.

Harry I. Ringermacher; Lawrence R. Mead

2005-11-02T23:59:59.000Z

330

Optical processing furnace with quartz muffle and diffuser plate  

DOE Patents [OSTI]

An optical furnace for annealing a process wafer comprising a source of optical energy, a quartz muffle having a door to hold the wafer for processing, and a quartz diffuser plate to diffuse the light impinging on the quartz muffle; a feedback system with a light sensor located in the wall of the muffle is also provided for controlling the source of optical energy.

Sopori, Bhushan L. (Denver, CO)

1996-01-01T23:59:59.000Z

331

Microwave sintering of single plate-shaped articles  

DOE Patents [OSTI]

Apparatus and method are disclosed for high temperature sintering of plate-shaped articles of alumina, magnesia, silica, yttria, zirconia, and mixtures thereof using microwave radiation. An article is placed within a sintering structure located within a sintering container which is placed in a microwave cavity for heating. The rates at which heating and cooling take place is controlled. 2 figs.

Katz, J.D.; Blake, R.D.

1995-07-11T23:59:59.000Z

332

Low Cost PEM Fuel Cell Metal Bipolar Plates  

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

manufacture. - Demonstrate our metal plate application in portable, stationary and automobile fuel cell systems. 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50...

333

anterior locking plates: Topics by E-print Network  

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

acq(A)2; rel(A)3; acq(C)10; rel(C)11; Q : acq(B)6; rel(B)7; acq(D)14; rel(D)15 Mller-Olm, Markus 277 MICROPLATES OptiPlates (white and black) Biology and Medicine Websites...

334

Enhanced radiative heat transfer between nanostructured gold plates  

E-Print Network [OSTI]

We compute the radiative heat transfer between nanostructured gold plates in the framework of the scattering theory. We predict an enhancement of the heat transfer as we increase the depth of the corrugations while keeping the distance of closest approach fixed. We interpret this effect in terms of the evolution of plasmonic and guided modes as a function of the grating's geometry.

R. Guérout; J. Lussange; F. S. S. Rosa; J. -P. Hugonin; D. A. R. Dalvit; J. -J. Greffet; A. Lambrecht; S. Reynaud

2012-03-07T23:59:59.000Z

335

STEEL PLATE SHEAR WALL BUILDINGS: DESIGN REQUIREMENTS AND RESEARCH  

E-Print Network [OSTI]

STEEL PLATE SHEAR WALL BUILDINGS: DESIGN REQUIREMENTS AND RESEARCH Michel Bruneau, P.E. 1 Dr. Bruneau is conducting research on the seismic evaluation and retrofit of existing steel bridges, steel of this research, and has co- authored the book "Ductile Design of Steel Structures" published in 1997 by Mc

Bruneau, Michel

336

Cost Effective Surface Modification For Metallic Bipolar Plates  

E-Print Network [OSTI]

.g. stamping or corrugation) ·Gas impermeable ·Higher electrical and thermal conductivities Relates to DOE R&D Plan Component Technical Barriers Task 14 "Alternative bipolar plate materials/coatings that are low an electrical- conductive and corrosion-resistant nitride surface layer during thermal (gas) nitriding ·Existing

337

Plate-Based Fuel Processing System Final Report  

SciTech Connect (OSTI)

On-board reforming of liquid fuels into hydrogen is an enabling technology that could accelerate consumer usage of fuel cell powered vehicles. The technology would leverage the convenience of the existing gasoline fueling infrastructure while taking advantage of the fuel cell efficiency and low emissions. Commercial acceptance of on-board reforming faces several obstacles that include: (1) startup time, (2) transient response, and (3) system complexity (size, weight and cost). These obstacles are being addressed in a variety of projects through development, integration and optimization of existing fuel processing system designs. In this project, CESI investigated steam reforming (SR), water-gas-shift (WGS) and preferential oxidation (PrOx) catalysts while developing plate reactor designs and hardware where the catalytic function is integrated into a primary surface heat exchanger. The plate reactor approach has several advantages. The separation of the reforming and combustion streams permits the reforming reaction to be conducted at a higher pressure than the combustion reaction, thereby avoiding costly gas compression for combustion. The separation of the two streams also prevents the dilution of the reformate stream by the combustion air. The advantages of the plate reactor are not limited to steam reforming applications. In a WGS or PrOx reaction, the non-catalytic side of the plate would act as a heat exchanger to remove the heat generated by the exothermic WGS or PrOx reactions. This would maintain the catalyst under nearly isothermal conditions whereby the catalyst would operate at its optimal temperature. Furthermore, the plate design approach results in a low pressure drop, rapid transient capable and attrition-resistant reactor. These qualities are valued in any application, be it on-board or stationary fuel processing, since they reduce parasitic losses, increase over-all system efficiency and help perpetuate catalyst durability. In this program, CESI took the initial steam reforming plate-reactor concept and advanced it towards an integrated fuel processing system. A substantial amount of modeling was performed to guide the catalyst development and prototype hardware design and fabrication efforts. The plate-reactor mechanical design was studied in detail to establish design guidelines which would help the plate reactor survive the stresses of repeated thermal cycles (from start-ups and shut-downs). Integrated system performance modeling was performed to predict system efficiencies and determine the parameters with the most significant impact on efficiency. In conjunction with the modeling effort, a significant effort was directed towards catalyst development. CESI developed a highly active, sulfur tolerant, coke resistant, precious metal based reforming catalyst. CESI also developed its own non-precious metal based water-gas shift catalyst and demonstrated the catalysts durability over several thousands of hours of testing. CESI also developed a unique preferential oxidation catalyst capable of reducing 1% CO to < 10 ppm CO over a 35 C operating window through a single pass plate-based reactor. Finally, CESI combined the modeling results and steam reforming catalyst development efforts into prototype hardware. The first generation 3kW(e) prototype was fabricated from existing heat-exchanger plates to expedite the fabrication process. This prototype demonstrated steady state operation ranging from 5 to 100% load conditions. The prototype also demonstrated a 20:1 turndown ratio, 10:1 load transient operation and rapid start-up capability.

Carlos Faz; Helen Liu; Jacques Nicole; David Yee

2005-12-22T23:59:59.000Z

338

Tools for Closure Project and Contract Management: Development of the Rocky Flats Integrated Closure Project Baseline  

SciTech Connect (OSTI)

This paper details the development of the Rocky Flats Integrated Closure Project Baseline - an innovative project management effort undertaken to ensure proactive management of the Rocky Flats Closure Contract in support of the Department's goal for achieving the safe closure of the Rocky Flats Environmental Technology Site (RFETS) in December 2006. The accelerated closure of RFETS is one of the most prominent projects within the Department of Energy (DOE) Environmental Management program. As the first major former weapons plant to be remediated and closed, it is a first-of-kind effort requiring the resolution of multiple complex technical and institutional challenges. Most significantly, the closure of RFETS is dependent upon the shipment of all special nuclear material and wastes to other DOE sites. The Department is actively working to strengthen project management across programs, and there is increasing external interest in this progress. The development of the Rocky Flats Integrated Closure Project Baseline represents a groundbreaking and cooperative effort to formalize the management of such a complex project across multiple sites and organizations. It is original in both scope and process, however it provides a useful precedent for the other ongoing project management efforts within the Environmental Management program.

Gelles, C. M.; Sheppard, F. R.

2002-02-26T23:59:59.000Z

339

Analysis of Fracture in Cores from the Tuff Confining Unit beneath Yucca Flat, Nevada Test Site  

SciTech Connect (OSTI)

The role fractures play in the movement of groundwater through zeolitic tuffs that form the tuff confining unit (TCU) beneath Yucca Flat, Nevada Test Site, is poorly known. This is an important uncertainty, because beneath most of Yucca Flat the TCU lies between the sources of radionuclide contaminants produced by historic underground nuclear testing and the regional carbonate aquifer. To gain a better understanding of the role fractures play in the movement of groundwater and radionuclides through the TCU beneath Yucca Flat, a fracture analysis focusing on hydraulic properties was performed on conventional cores from four vertical exploratory holes in Area 7 of Yucca Flat that fully penetrate the TCU. The results of this study indicate that the TCU is poorly fractured. Fracture density for all fractures is 0.27 fractures per vertical meter of core. For open fractures, or those observed to have some aperture, the density is only 0.06 fractures per vertical meter of core. Open fractures are characterized by apertures ranging from 0.1 to 10 millimeter, and averaging 1.1 millimeter. Aperture typically occurs as small isolated openings along the fracture, accounting for only 10 percent of the fracture volume, the rest being completely healed by secondary minerals. Zeolite is the most common secondary mineral occurring in 48 percent of the fractures observed.

Lance Prothro

2008-03-01T23:59:59.000Z

340

Recovering Shape Characteristics on Near-flat Specular Surfaces Yuanyuan Ding and Jingyi Yu  

E-Print Network [OSTI]

surfaces have also been directly integrated into Figure 1. Distortions observed on near-flat window surfaces. animations and film footage to reproduce realistic phenom- ena [4]. In this paper, we focus example is the image observed on a window as shown in Figure 1. Although the surface is highly planar

Taufer, Michela

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


341

Geometric Control and Differential Flatness of a Quadrotor UAV with a Cable-Suspended Load  

E-Print Network [OSTI]

is established to be a differentially-flat hybrid system with the load position and the quadrotor yaw serving on the configuration space SE(3)Ă?S2 , is obtained by taking variations on manifolds. The quadrotor-load system, see [9]. However, carrying an external load through a gripper increases the inertia of the system

Sreenath, Koushil

342

A lowstand epikarstic intertidal flat from the middle Silurian of Gotland, Sweden  

E-Print Network [OSTI]

A lowstand epikarstic intertidal flat from the middle Silurian of Gotland, Sweden Mikael Calner, Sweden Received 17 August 2000; accepted 29 June 2001 Abstract This paper describes the sedimentology the Klintehamn area on western Gotland (Sweden). The epikarst represents the most distal portion

Calner, Mikael

343

KINEMATIC CONTROL OF A NONHOLONOMIC WHEELED MOBILE MANIPULATOR A DIFFERENTIAL FLATNESS APPROACH  

E-Print Network [OSTI]

the terminal conditions in the flat output space while control design reduces to a pole-placement problem) electro-mechanical testing. NOMENCLATURE WMR Wheeled Mobile Robot WMM Wheeled Mobile Manipulator ( ),x y Cartesian coordinates of the center of the wheel axle of the WMR Orientation of the WMR with respect

Krovi, Venkat

344

Supercontinuum-based 10-GHz flat-topped optical frequency comb generation  

E-Print Network [OSTI]

and Nanoscience Department, Chalmers University of Technology, SE-41296 Göteborg, Sweden * rwu@purdue.edu Abstract-topped optical frequency comb (> 3.64-THz or 28 nm bandwidth with ~365 spectral lines within 3.5-dB power device allows the pulses to enter into the optical wave-breaking regime, thus achieving a smooth flat

Purdue University

345

Mineralogic Zonation Within the Tuff Confining Unit, Yucca Flat, Nevada Test Site  

SciTech Connect (OSTI)

Recently acquired mineralogic data from drill hole samples in Yucca Flat show that the tuff confining unit (TCU) can be subdivided into three mineralogic zones based on the relative abundances of primary and secondary mineral assemblages. These zones are (1) an upper zone characterized by the abundance of the zeolite mineral clinoptilolite with lesser amounts of felsic and clay minerals; (2) a middle zone with felsic minerals dominant over clinoptilolite and clay minerals; and (3) a basal argillic zone where clay minerals are dominant over felsic minerals and clinoptilolite. Interpretation of the mineralogic data, along with lithologic, stratigraphic, and geophysical data from approximately 500 drill holes, reveals a three-layer mineralogic model for the TCU that shows all three zones are extensive beneath Yucca Flat. The mineralogic model will be used to subdivide the TCU in the Yucca Flat hydrostratigraphic framework model, resulting in a more accurate and versatile framework model. In addition, the identification of the type, quantity, and distribution of minerals within each TCU layer will permit modelers to better predict the spatial distribution and extent of contaminant transport from underground tests in Yucca Flat, at both the level of the hydrologic source term and the corrective action unit.

Lance Prothro

2005-09-01T23:59:59.000Z

346

Supervised Learning via Discriminative k q-Flats Arthur Szlam and Guillermo Sapiro  

E-Print Network [OSTI]

modify this energy so that it penalizes classification errors. In this note we consider the following-q-flats algorithm for pattern classification is introduced in this work. The ba- sic idea is to replace the original, showing that the method is computa- tionally very efficient and gives excellent results on standard

Soatto, Stefano

347

Interacting polytropic gas model of phantom dark energy in non-flat universe  

E-Print Network [OSTI]

By introducing the polytropic gas model of interacting dark energy, we obtain the equation of state for the polytropic gas energy density in a non-flat universe. We show that for even polytropic index by choosing $K>Ba^{\\frac{3}{n}}$, one can obtain $\\omega^{\\rm eff}_{\\Lambda}<-1$, which corresponds to a universe dominated by phantom dark energy.

K. Karami; S. Ghaffari; J. Fehri

2009-11-25T23:59:59.000Z

348

A Soft Wearable Robotic Device for Active Knee Motions using Flat Pneumatic Artificial Muscles  

E-Print Network [OSTI]

elastomer muscles were employed for assisted knee extension and flexion. The robotic device was testedA Soft Wearable Robotic Device for Active Knee Motions using Flat Pneumatic Artificial Muscles Yong present the design of a soft wearable robotic device composed of elastomeric artificial muscle actuators

Park, Yong-Lae

349

RIGID FLAT WEBS ON THE PROJECTIVE PLANE DAVID MARIN AND JORGE VITORIO PEREIRA  

E-Print Network [OSTI]

RIGID FLAT WEBS ON THE PROJECTIVE PLANE DAVID MAR´IN AND JORGE VIT´ORIO PEREIRA Abstract the invitation of CRM at Bellaterra in July 2010. 1 #12;2 DAVID MAR´IN AND JORGE VIT ´ORIO PEREIRA for a generic

Pereira, Jorge VitĂłrio

350

Mercury Contamination from Hydraulic Placer-Gold Mining in the Dutch Flat Mining  

E-Print Network [OSTI]

179 Mercury Contamination from Hydraulic Placer-Gold Mining in the Dutch Flat Mining District, California By Michael P. Hunerlach, James J. Rytuba, and Charles N. Alpers ABSTRACT Mercury contamination mercury (quicksilver) was used extensively for the recovery of gold at both placer and hardrock mines

351

EIS-0064: Rocky Flats Plant Site, Jefferson County, Golden, Colorado (see also ERDA-1545-D)  

Broader source: Energy.gov [DOE]

The U.S. Department of Energy developed this statement to evaluate the site specific environmental impacts of continuing to conduct nuclear weapons production activities at the Rocky Flats Plant; alternatives for the conduct of such activities; and environmental impacts of the U.S. policy to produce nuclear weapons.

352

Laminated exfoliated graphite composite-metal compositions for fuel cell flow field plate or bipolar plate applications  

DOE Patents [OSTI]

An electrically conductive laminate composition for fuel cell flow field plate or bipolar plate applications. The laminate composition comprises at least a thin metal sheet having two opposed exterior surfaces and a first exfoliated graphite composite sheet bonded to the first of the two exterior surfaces of the metal sheet wherein the exfoliated graphite composite sheet comprises: (a) expanded or exfoliated graphite and (b) a binder or matrix material to bond the expanded graphite for forming a cohered sheet, wherein the binder or matrix material is between 3% and 60% by weight based on the total weight of the first exfoliated graphite composite sheet. Preferably, the first exfoliated graphite composite sheet further comprises particles of non-expandable graphite or carbon in the amount of between 3% and 60% by weight based on the total weight of the non-expandable particles and the expanded graphite. Further preferably, the laminate comprises a second exfoliated graphite composite sheet bonded to the second surface of the metal sheet to form a three-layer laminate. Surface flow channels and other desired geometric features can be built onto the exterior surfaces of the laminate to form a flow field plate or bipolar plate. The resulting laminate has an exceptionally high thickness-direction conductivity and excellent resistance to gas permeation.

Zhamu, Aruna; Shi, Jinjun; Guo, Jiusheng; Jang, Bor Z

2014-05-20T23:59:59.000Z

353

Comparison of flat cleaved and cylindrical diffusing fibers as treatment sources for interstitial photodynamic therapy  

SciTech Connect (OSTI)

Purpose: For interstitial photodynamic therapy (iPDT) of bulky tumors, careful treatment planning is required in order to ensure that a therapeutic dose is delivered to the tumor, while minimizing damage to surrounding normal tissue. In clinical contexts, iPDT has typically been performed with either flat cleaved or cylindrical diffusing optical fibers as light sources. Here, the authors directly compare these two source geometries in terms of the number of fibers and duration of treatment required to deliver a prescribed light dose to a tumor volume. Methods: Treatment planning software for iPDT was developed based on graphics processing unit enhanced Monte Carlo simulations. This software was used to optimize the number of fibers, total energy delivered by each fiber, and the position of individual fibers in order to deliver a target light dose (D{sub 90}) to 90% of the tumor volume. Treatment plans were developed using both flat cleaved and cylindrical diffusing fibers, based on tissue volumes derived from CT data from a head and neck cancer patient. Plans were created for four cases: fixed energy per fiber, fixed number of fibers, and in cases where both or neither of these factors were fixed. Results: When the number of source fibers was fixed at eight, treatment plans based on flat cleaved fibers required each to deliver 7180–8080 J in order to deposit 90 J/cm{sup 2} in 90% of the tumor volume. For diffusers, each fiber was required to deliver 2270–2350 J (333–1178 J/cm) in order to achieve this same result. For the case of fibers delivering a fixed 900 J, 13 diffusers or 19 flat cleaved fibers at a spacing of 1 cm were required to deliver the desired dose. With energy per fiber fixed at 2400 J and the number of fibers fixed at eight, diffuser fibers delivered the desired dose to 93% of the tumor volume, while flat cleaved fibers delivered this dose to 79%. With both energy and number of fibers allowed to vary, six diffusers delivering 3485–3600 J were required, compared to ten flat cleaved fibers delivering 2780–3600 J. Conclusions: For the same number of fibers, cylindrical diffusers allow for a shorter treatment duration compared to flat cleaved fibers. For the same energy delivered per fiber, diffusers allow for the insertion of fewer fibers in order to deliver the same light dose to a target volume.

Baran, Timothy M., E-mail: timothy.baran@rochester.edu; Foster, Thomas H. [Department of Imaging Sciences, University of Rochester, Rochester, New York 14642 (United States)] [Department of Imaging Sciences, University of Rochester, Rochester, New York 14642 (United States)

2014-02-15T23:59:59.000Z

354

E-Print Network 3.0 - anisotropic plates subjected Sample Search...  

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

in a Langmuir trough experiment is the Wilhelmy plate.1... The plate measures the net tension on the surface. The reported surface pressure is then the tension ... Source: Lee,...

355

Development of fabrication techniques for europia/iron cermet reactor control-arm plates  

SciTech Connect (OSTI)

Dense europia spheroids were dispersed in iron powder prior to pressing and sintering. The plates had adequate strength and possessed a neutron absorption worth in excess of comparable cadmium plates. 4 refs.

Moore, D.A.; Tarrant, E.A.

1982-06-01T23:59:59.000Z

356

Buckling and vibration of orthotropic plates with an internal line hinge  

E-Print Network [OSTI]

locations, and edge support conditions. In particular, buckling factors are determined for plates with modulus ratios of 1, 3, 10 and 25 using the classical plate theory and first order shear deformation theory. Vibration frequencies are obtained...

Gupta, Praveen R.

2001-01-01T23:59:59.000Z

357

Vibration suppression of laminated composite plates using embedded smart material layers  

E-Print Network [OSTI]

In this study, a complete theoretical formulation of laminated composite plates with integrated smart material layers that serve as sensors and/or actuators is presented for the vibration suppression of laminated composite plates. The third...

Krishnan, Sivasubramaniam

2000-01-01T23:59:59.000Z

358

Vibration control in plates by uniformly distributed PZT actuators interconnected via electric networks  

E-Print Network [OSTI]

improve the performances of piezoelectric actuation. internal resonance / equivalent circuits 1Vibration control in plates by uniformly distributed PZT actuators interconnected via electric vibrations of plates by means of a set of electrically-interconnected piezoelectric actuators is described

Paris-Sud XI, Université de

359

E-Print Network 3.0 - automated microbiology plating Sample Search...  

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

need to be performed as part of (automated version of) assay 1.1.2. Identify appropriate micro-plate... plates? Does the automation (material handling robot) have sufficient...

360

New Zone Plate for Soft X-Ray Microscopy at 15-nm Spatial Resolution  

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

New Zone Plate for Soft X-Ray Microscopy at 15-nm Spatial Resolution New Zone Plate for Soft X-Ray Microscopy at 15-nm Spatial Resolution Print Wednesday, 31 August 2005 00:00...

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


361

Invited Paper Shape Control of Composite Material Plates Using Piezoelectric Actuators  

E-Print Network [OSTI]

of smart structures. These material include piezoelectric polymers and ceramics, shape memory alloysInvited Paper Shape Control of Composite Material Plates Using Piezoelectric Actuators Brij N control of composite material plates using piezoelectric actuators. A finite element formulation

362

878 JOURNAL OF MICROELECTROMECHANICAL SYSTEMS, VOL. 19, NO. 4, AUGUST 2010 A Flat Heat Pipe Architecture Based on  

E-Print Network [OSTI]

878 JOURNAL OF MICROELECTROMECHANICAL SYSTEMS, VOL. 19, NO. 4, AUGUST 2010 A Flat Heat Pipe pipe is developed for Thermal Ground Plane (TGP) appli- cations. The Ti-based heat pipe architecture chamber. The scalable heat pipes' flat geometry facilitates contact with planar heat sources

MacDonald, Noel C.

363

Manufacturing of composite violin top plates and design of composite tailpieces By : Maxime Beaulieu  

E-Print Network [OSTI]

the Chladni pattern method and Tap Tone method. ·A qualitative analysis of the acoustics when the plates

Barthelat, Francois

364

Preservation of contrasting geothermal gradients across the Caribbean-North America plate  

E-Print Network [OSTI]

Preservation of contrasting geothermal gradients across the Caribbean-North America plate boundary the North American and Caribbean plates, document a sharp cooling age discontinuity across the fault the Caribbean-North America plate boundary (Motagua Fault, Guatemala), Tectonics, 32, 993­1010, doi:10.1002/tect

Paris-Sud XI, Université de

365

Effect of Plating Variables on Whisker Formation in Pure Tin Films  

E-Print Network [OSTI]

Effect of Plating Variables on Whisker Formation in Pure Tin Films Stephanie Miller Advisors & Materials Engineering, Washington State University Introduction Tin whiskers are single-crystal filaments the effect of plating variables on whisker growth in tin-plated copper samples, with the goal of finding

Collins, Gary S.

366

Electroless iron plating on pure magnesium for biomedical applications Xingkai Zhang a  

E-Print Network [OSTI]

: Biomaterials Deposition Corrosion Thin films a b s t r a c t Electroless nickel plating is usually adopted geometries. Electroless nickel plating [10] is usually used to protect the magnesium alloy from corrosionElectroless iron plating on pure magnesium for biomedical applications Xingkai Zhang a , Wei Han a

Zheng, Yufeng

367

Antiproton, positron, and electron imaging with a microchannel plate/phosphor detector  

E-Print Network [OSTI]

Antiproton, positron, and electron imaging with a microchannel plate/phosphor detector ALPHA; accepted 2 November 2009; published online 1 December 2009 A microchannel plate MCP /phosphor screen Microchannel plate MCP /phosphor screen based diag- nostics have proved invaluable in studying the evolution

Fajans, Joel

368

Author's personal copy Investigation of effect of polyurea on response of steel plates  

E-Print Network [OSTI]

Author's personal copy Investigation of effect of polyurea on response of steel plates to impulsive the results of the response of monolithic steel plates and steel-polyurea bilayer plates to impulsive blast), it will magnify the initial shock effect and promote fail- ure. These experimental results are paralleled

Nemat-Nasser, Sia

369

FRACTURE INVESTIGATION IN FRP PLATE DEBONDING and C.J. Burgoyne1  

E-Print Network [OSTI]

1 FRACTURE INVESTIGATION IN FRP PLATE DEBONDING G.X. Guan1 and C.J. Burgoyne1 1 Department. The plate debonding is clearly a fracture event that is initiated from the inevitable flaws in the concrete fracture observation for the plate debonding failure that occurs in the concrete cover layer. This paper

Burgoyne, Chris

370

Response of a slotted plate flow meter to horizontal two phase flow  

E-Print Network [OSTI]

meter is always better in performance and accuracy than the standard orifice plate flow meter. This study is primarily based on how a slotted plate responds to horizontal two-phase flow with air and water being used as the working fluids. The plates...

Muralidharan, Vasanth

2005-02-17T23:59:59.000Z

371

On the effective plate thickness of monolayer graphene from flexural wave propagation  

E-Print Network [OSTI]

On the effective plate thickness of monolayer graphene from flexural wave propagation Sung Youb Kim utilize classical molecular dynamics to study flexural, or transverse wave propagation in monolayer) mode of wave propagation in a thin plate with plate thickness of h ÂĽ 0:104 nm. Finally, we find

Lin, Xi

372

Optimal piezo-electro-mechanical coupling to control plate vibrations  

E-Print Network [OSTI]

A new way of coupling electrical and mechanical waves, using piezoelectric effect, is presented here. Since the energy exchange between two systems supporting wave propagation is maximum when their evolution is governed by similar equations, hence, an optimal electromechanical coupling is obtained by designing an electric network which is "analog" to the mechanical structure to be controlled. In this paper, we exploit this idea to enhance the coupling, between a Kirchhoff-Love plate and one possible synthesis of its circuital analog, as obtained by means of a set of piezoelectric actuators uniformly distributed upon the plate. It is shown how this approach allows for an optimal energy exchange between the mechanic and the electric forms independent of the modal evolution of the structure. Moreover, we show how an efficient electric dissipation of the mechanical energy can be obtained adding dissipative elements in the electric network.

S. Alessandroni; F. dell'Isola; F. Frezza

2010-08-30T23:59:59.000Z

373

Optical processing furnace with quartz muffle and diffuser plate  

DOE Patents [OSTI]

An optical furnace for annealing a process wafer is disclosed comprising a source of optical energy, a quartz muffle having a door to hold the wafer for processing, and a quartz diffuser plate to diffuse the light impinging on the quartz muffle; a feedback system with a light sensor located in the wall of the muffle is also provided for controlling the source of optical energy. 5 figs.

Sopori, B.L.

1996-11-19T23:59:59.000Z

374

Electroless plating of graphite with copper and nickel  

SciTech Connect (OSTI)

Decommissioning in the European Union of gas-cooled nuclear reactors using graphite as the moderator will generate a large amount of irradiated graphite as waste. Graphite is a radioactive waste of relatively low activity and consequently the options considered for the management of the waste may include: (i) incineration, (ii) ocean bed disposal, (iii) deep geological disposal, and (iv) shallow land burial. In case the last is the selected mode, an appropriate conditioning procedure is necessary before final disposal, by covering the graphite with a material avoiding or reducing the emission of radionuclides to its surrounding. This work analyses the possibility of conditioning graphite pieces (with a large proportion of pores of different sizes up to 100 {micro}m) with a metal coating of copper or nickel produced by electroless plating, with the aim of completely isolating the graphite from its surrounding. Electroless plating with copper results in a very large proportion of pores filled or covered, but a fraction of the pores remain in the graphite, which decreases with increasing thickness of metal deposit. Furthermore, the copper plating is permeable to liquids and consequently the graphite does not become completely isolated from the surrounding. The percentage of porosity filled or covered by nickel deposits is similar to copper, but they are not permeable to liquids, at least when the thickness is relatively high, and consequently the access of the liquids to the graphite is rather limited. However, when electroless plating with copper is followed by nickel deposition the graphite becomes isolated from the exterior.

Caturla, F.; Molina, F.; Molina-Sabio, M.; Rodriguez-Reinoso, F. [Univ. de Alicante (Spain). Dept. de Quimica Inorganica; Esteban, A. [CIEMAT, Madrid (Spain)

1995-12-01T23:59:59.000Z

375

Low Cost PEM Fuel Cell Metal Bipolar Plates  

E-Print Network [OSTI]

Low Cost PEM Fuel Cell Metal Bipolar Plates CH Wang TreadStone Technologies, Inc. Fuel Cell Project, stationary and automobile fuel cell systems. $0.00 $0.05 $0.10 $0.15 $0.20 $0.25 $0.30 $0.35 $0.40 $0.45 $0. · The technology has been evaluated by various clients and used in portable fuel cell power systems. Corporate

376

aux propositions Monte Verit Le Congressi Stefano Franscini, plate-  

E-Print Network [OSTI]

Appel aux propositions Monte Verità Le Congressi Stefano Franscini, plate- forme de congrès de l'Ecole polytechnique fédérale de Zurich, offre la possibilité d'or- ganiser des conférences de recherche au Monte senior et junior, séjournant au Monte Verità pendant toute la durée de la conférence Le formulaire de

Richner, Heinz

377

Eigenmodes of surface energies for shape analysis Klaus Hildebrandt, Christian Schulz, Christoph von Tycowicz, and Konrad Polthier  

E-Print Network [OSTI]

of a flat plate (Chladni plates). For curved surfaces more elaborate models are required to describe

Polthier, Konrad

378

Magnetostructural phase transition in electroless-plated Ni nanoarrays  

SciTech Connect (OSTI)

Ni nanoarrays were synthesized by electroless-plating and shaped by an anodic aluminum oxide template. The as-plated arrays exhibited superparamagnetic (SM) ordering resulting from nanocrystalline microstructure. Ferromagnetic (FM) ordering was found to be restored as the arrays' crystallinity was enhanced upon post-annealing. The microstructure (crystallinity) and the FM ordering are strongly coupled, revealing a magneto-structural correlation for the arrays. The magnetostructural properties of the arrays can be controlled by post-annealing, where the magnetization is proportional to the annealing temperature. The electroless-plated arrays synthesized in this work display magnetic anisotropy not found in electroplated ones. This is likely attributed to the nature of the clusterlike microstructure, whose cluster-boundaries may confine the FM rotation within the cluster. The spin-polarization was probed by x-ray magnetic circular dichroism while the arrays underwent the SM{yields}FM phase transition. The sum-rules results reveal that the total magnetization of the arrays is dominated by spin moment (m{sub spin}). The change in m{sub spin} is responsible for the SM{yields}FM phase transition upon annealing, as well as for the loss of magnetization upon temperature increase that we observed macroscopically.

Huang, Chun-Chao; Lo, Chih-Chieh; Tseng, Yuan-Chieh; Liu, Chien-Min; Chen, Chih [Department of Materials Science and Engineering, National Chiao Tung University 1001, Ta Hsueh Road, Hsin-Chu 30010, Taiwan (China)

2011-06-01T23:59:59.000Z

379

Micromechanisms of ductile fracturing of DH-36 steel plates under impulsive loads and influence of polyurea reinforcing  

E-Print Network [OSTI]

of ductile fracturing of DH-36 steel plates under impulsiveductile fracturing of DH-36 steel plates subjected to blast-microstructure of the deformed steel samples also revealed

Amini, M. R.; Nemat-Nasser, S.

2010-01-01T23:59:59.000Z

380

Possibility of corrector plate tuning of x-ray focusing  

SciTech Connect (OSTI)

Schemes for focusing a hard x-ray beam to a small spot are described. The theoretical minimum spot size, assuming perfect mirror shape, is shown to be 4 nm FWHM, independent of x-ray wavelength. This is less than the 10 nm previously said to be the minimum achievable diffraction-limited x-ray spot size. While providing the penetrating power only possible with x rays, this approaches the resolution needed to image individual atoms or atomic layers. However, the perfect mirror assumption is physically unrealistic. This paper discusses the compensation of mirror shape errors by a corrector plate and shows that the tolerances for corrector plate shape are far looser than are tolerances for mirror shape. The full eventual success of achieving theoretical minimum resolution will require mirror shape precision considerably better than has been achieved at this time, though far looser than would be required for simpleminded paraboloidal focusing. Two variants of the scheme, subject to the same mathematical treatment, are described. (i) The ''corrector plate'' name is copied from the similarly functioning element of the same name in a Schmidt camera. The focusing is achieved using glancing, yet coherent, reflection from a high-Z paraboloidal mirror. The strategy is to obtain dominant focusing from reflection and to compensate with weak refractive focusing. The reflective focusing is strong and achromatic but insufficiently accurate. The refractive focusing is weak and chromatic but highly accurate. The corrector plate improves resolution the way eyeglasses help a person to see. It can, for example, be ''fitted'' the same trial-and-error way an optometrist establishes a prescription for glasses. Dimensional tolerances for the compensator are far looser than would be needed for a mirror to achieve the same resolution. Unlike compound refractive lenses, attenuation will be small, at least for wavelengths longer than 1 A, because the compensation layer is thin. (ii) For this variant, the corrector plate is a washer-shaped refractive or Fresnel lens, and the mirror is (theoretically) a perfect cone. All focusing is provided by the lens. Even though the cone provides no focusing, it improves the resolution by increasing the numerical aperture of the device. Compared to a paraboloidal shape, it is assumed that the conical shape can be more accurately fabricated. Of the two variants, only the first variant is, in principle, capable of achieving the theoretical minimum resolution. Configurations are suggested, in both case (i) and case (ii), that use currently possible construction precisions to produce resolutions better than have been achieved to date. However, both results will remain well above the theoretical minimum until fabrication techniques have been developed that provide greater precision than is possible at this time.

Talman, Richard

2009-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


381

FULL SIZE U-10MO MONOLITHIC FUEL FOIL AND FUEL PLATE FABRICATION-TECHNOLOGY DEVELOPMENT  

SciTech Connect (OSTI)

Full-size U10Mo foils are being developed for use in high density LEU monolithic fuel plates. The application of a zirconium barrier layer too the foil is applied using a hot co-rolling process. Aluminum clad fuel plates are fabricated using Hot Isostatic Pressing (HIP) or a Friction Bonding (FB) process. An overview is provided of ongoing technology development activities, including: the co-rolling process, foil shearing/slitting and polishing, cladding bonding processes, plate forming, plate-assembly swaging, and fuel plate characterization. Characterization techniques being employed include, Ultrasonic Testing (UT), radiography, and microscopy.

G. A. Moore; J-F Jue; B. H. Rabin; M. J. Nilles

2010-03-01T23:59:59.000Z

382

Wet electrostatic precipitator having removable nested hexagonal collector plates and magnetic aligning and rapping means  

SciTech Connect (OSTI)

A wet electrostatic precipitator including a plurality of removable nested collecting electrodes or plates forming a repeating pattern of hexagonal collecting zones throughout the precipitator. Each collecting plate is formed with a sixty degree bend along two opposing longitudinal edges so as to allow three plates to form a self-nesting Y-shaped intersection point. Six points form a hexagonal collecting zone. The plates are removable thereby expediting replacement. A plurality of strategically placed spray nozzles provide wash fluid to the plates. Magnet sets provide for discharge electrode alignment and rapping.

Young, C.E.; Drzewiecki, G.

1984-04-10T23:59:59.000Z

383

Air Quality Scoping Study for Sarcobatus Flat, Nevada (EMSI April 2007)  

SciTech Connect (OSTI)

The Desert Research Institute (DRI) is performing a scoping study as part of the U.S. Department of Energy’s Yucca Mountain Environmental Monitoring Systems Initiative (EMSI). The main objective is to obtain baseline air quality information for Yucca Mountain and an area surrounding the Nevada Test Site (NTS). Air quality and meteorological monitoring and sampling equipment housed in a mobile trailer (shelter) is collecting data at seven sites outside the NTS, including Ash Meadows National Wildlife Refuge, Sarcobatus Flat, Beatty, Rachel, Caliente, Pahranagat National Wildlife Refuge, and Crater Flat, and at four sites on the NTS. The trailer is stationed at any one site for approximately eight weeks at a time. Letter reports provide summaries of air quality and meteorological data, on completion of each site’s sampling program.

Johann Engelbrecht, Ilias Kavouras, Dave Campbell, Scott Campbell, Steven Kohl and David Shafer

2007-04-01T23:59:59.000Z

384

The marriage of RCRA and CERCLA at the Rocky Flats Environmental Technology Site  

SciTech Connect (OSTI)

A key goal of the Rocky Flats Cleanup Agreement (RFCA) signed in July of 1996 was to provide a seamless marriage of the Resource Conservation and Recovery Act (RCRA) (and other media specific programs) and the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) and the implementing agencies of each. This paper examines the two years since the signing of RFCA and identifies the successes, failures, and stresses of the marriage. RFCA has provided an excellent vehicle for regulatory and substantive progress at the Department of Energy`s Rocky Flats facility. The key for a fully successful marriage is to build on the accomplishments to date and to continually improve the internal and external systems and relationships. To date, the parties can be proud of both the substantial accomplishment of substantive environmental work and the regulatory systems that have enabled the work.

Shelton, D.C.; Brooks, L.M.

1998-11-01T23:59:59.000Z

385

Rocky Flats Environmental Technology Site Ecological Monitoring Program 1995 annual report  

SciTech Connect (OSTI)

The Ecological Monitoring Program (ECMP) was established at the Rocky Flats Environmental Technology Site (Site) in September 1992. At that time, EcMP staff developed a Program Plan that was peer-reviewed by scientists from western universities before submittal to DOE RFFO in January 1993. The intent of the program is to measure several quantitative variables at different ecological scales in order to characterize the Rocky Flats ecosystem. This information is necessary to document ecological conditions at the Site in impacted and nonimpacted areas to determine if Site practices have had ecological impacts, either positive or negative. This information can be used by managers interested in future use scenarios and CERCLA activities. Others interested in impact analysis may also find the information useful. In addition, these measurements are entered into a database which will serve as a long-term information repository that will document long-term trends and potential future changes to the Site, both natural and anthropogenic.

NONE

1995-05-31T23:59:59.000Z

386

Flat panel display using Ti-Cr-Al-O thin film  

DOE Patents [OSTI]

Thin films of Ti--Cr--Al--O are used as a resistor material. The films are rf sputter deposited from ceramic targets using a reactive working gas mixture of Ar and O.sub.2. Resistivity values from 10.sup.4 to 10.sup.10 Ohm-cm have been measured for Ti--Cr--Al--O film <1 .mu.m thick. The film resistivity can be discretely selected through control of the target composition and the deposition parameters. The application of Ti--Cr--Al--O as a thin film resistor has been found to be thermodynamically stable, unlike other metal-oxide films. The Ti--Cr--Al--O film can be used as a vertical or lateral resistor, for example, as a layer beneath a field emission cathode in a flat panel display; or used to control surface emissivity, for example, as a coating on an insulating material such as vertical wall supports in flat panel displays.

Jankowski, Alan F. (Livermore, CA); Schmid, Anthony P. (Solan Beach, CA)

2002-01-01T23:59:59.000Z

387

The Nature of Flat-Spectrum Nuclear Radio Emission in Seyfert Galaxies  

E-Print Network [OSTI]

Parsec-scale VLBA imaging of five Seyfert galaxies with flat-spectrum radio nuclei was conducted to determine whether the flat spectrum represents thermal emission from the accretion disk/obscuring torus or nonthermal, synchrotron self-absorbed emission. Four of the five show emission consistent with synchrotron self-absorption, with intrinsic sizes ~0.05-0.2 pc (or 10^4 gravitational radii for a 10^8 Msun black hole for the smallest). In contrast, NGC 4388, which was detected with MERLIN but not the VLBA, shows thermal emission with similar properties to that detected in NGC 1068. It is notable that the two Seyfert galaxies with detected thermal nuclear radio emission both have large X-ray absorbing columns, suggesting that columns in excess of \\~10^{24} cm^{-2} are needed for such disks to be detectable.

C. G. Mundell; A. S. Wilson; J. S. Ulvestad; A. L. Roy

2000-12-11T23:59:59.000Z

388

Fatigue damage accumulation and property degradation in flat versus cylindrical specimens  

E-Print Network [OSTI]

Material E? MPa l. 39E5 (20. 2 msi) 7. 24E3 (1. 05 msi) 6. 89E-11 (1. 0E-8 psi) Ezz MPa 9. 17E3 (1. 33 msi) 7. 24E3 (1. 05 msi) 6. 89E-11 (1. 0E-8 psi) &? 0. 3 0. 2 0. 5 MPB 7. 10E3 (1. 03 msi) 7. 10E3 (1. 03 msi) 6. 89E-11 (1.... OE-8 psi) MPa 7. 10E3 (1. 03 msi) 7. 10E3 (1. 03 msi) 6. 89E-11 (1. OE-8 psi) Grs MPa 7. 10E3 (1. 03 msi) 7. 10E3 (1. 03 msi) 6. 89E-11 (1. 0E-8 psi) 3. 2 Flat Coupons Two analyses were performed on flat coupons using CLASS...

Andrews, Kristine Bachtel

1992-01-01T23:59:59.000Z

389

Rocky Flats Plant fluidized-bed incinerator. Engineering design and reference manual  

SciTech Connect (OSTI)

The information in this manual is being presented to complete the documentation of the fluidized-bed incineration (FBI) process development at the Rocky Flats Plant. The information pertains to the 82-kg/hour demonstration unit at the Rocky Flats Plant. This document continues the presentation of design reference material in the aeas of equipment drawings, space requirements, and unit costs. In addition, appendices contain an operating procedure and an operational safety analysis of the process. The cost figures presented are based on 1978 dollars and have not been converted to a current dollar value. Also, the cost of modifications are not included, since they would be insignificant if they were incorporated into a new installation.

Meile, L.J.

1982-11-05T23:59:59.000Z

390

Effects of self-assembled monolayer and PFPE lubricant on wear characteristics of flat silicon tips.  

SciTech Connect (OSTI)

The effects of self-assembled monolayer (SAM) and perfluoropolyether (PFPE) lubricant on the wear characteristics of flat silicon tips were investigated. The wear test consisted of sliding the silicon tips fabricated on a flat silicon specimen against SAM and PFPE (Z-tetraol) coated silicon (100) wafer. The tips were slid at a low speed for about 15 km under an applied load of 39.2 {micro}N. The wear volume of the tip was obtained by measuring the tip profile using an Atomic Force Microscope (AFM). It was found that the coatings were effective in reducing the wear of the tips by an order of magnitude from 10{sup -6} to 10{sup -7}.

Kim, H. J.; Jang, C. E.; Kim, D. E.; Kim, Y. K.; Choa, S. H.; Hong, S.; Materials Science Division; Yonsei Univ.; Samsung Adv. Inst. Science and Technology; Seoul National Univ. of Technology

2009-01-01T23:59:59.000Z

391

Oil springs and flat top anticlines, Carbon County Wyoming: An unusual fold pair  

SciTech Connect (OSTI)

Oil Springs Anticline, northwest of Medicine Bow, Wyoming, and located at the northeast corner of the Hanna Basin, lies near the junction of the Freezeout Hills Anticline, the Shirley thrust fault and the Flat Top Anticline. The surface fold as defined by the outcrop of the Wall Creek Sandstone Member of the Frontier Formation is disharmonic to deeper structure at the level of the Jurassic Sundance Formation. The fold is wedged between two major folds and is the result of a space problem between larger structural elements. The controlling Flat Top Anticline is an excellent example of a fold controlled by a well constrained fault in the Precambrian crystalline basement. The basement is bowed upward and outward to the northwest in the hanging wall of the Flat Top Anticline. The purpose of this paper is to describe the geologic structure of the Oil Springs and Flat Top anticlines and their relationship to the Freezeout Hills and the Hanna Basin. Commercial production of petroleum and natural gas occurs on the west flank of the Laramie-Cooper Lake Basin as far north as the northeast corner of the Hanna Basin. Stone reviewed the producing formations in the Laramie and eastern Hanna basins and noted that 11 commercial accumulations of petroleum and natural gas are directly related to anticlinal structures. Production derived from the Permian-Pennsylvanian Tensleep Sandstone in this region has a special geologic framework. Fields that produce from the Tensleep Sandstone are well defined anticlines bounded by faults or fault systems, a situation also reported by Biggs and Espach, Blackstone and in the Wyoming Geological Association Symposium. The Tensleep Sandstone reservoirs in these faulted anticlines are in juxtaposition to potential source rocks of either Jurassic or Cretaceous age in the footwalls of the faults. 17 refs., 9 figs., 1 tab.

Blackstone, D.L. Jr. (Univ. of Wyoming, Laramie, WY (United States))

1994-04-01T23:59:59.000Z

392

Historical Exposures to Chemicals at the Rocky Flats Nuclear Weapons Plant: A Pilot Retrospective Exposure Assessment  

SciTech Connect (OSTI)

In a mortality study of white males who had worked at the Rocky Flats Nuclear Weapons Plant between 1952 and 1979, an increased number of deaths from benign and unspecified intracranial neoplasms was found. A case-control study nested within this cohort investigated the hypothesis that an association existed between brain tumor death and exposure to either internally deposited plutonium or external ionizing radiation. There was no statistically significant association found between estimated radiation exposure from internally deposited plutonium and the development of brain tumors. Exposure by job or work area showed no significant difference between the cohort and the control groups. An update of the study found elevated risk estimates for (1) all lymphopoietic neoplasms, and (2) all causes of death in employees with body burdens greater than or equal to two nanocuries of plutonium. There was an excess of brain tumors for the entire cohort. Similar cohort studies conducted on worker populations from other plutonium handling facilities have not yet shown any elevated risks for brain tumors. Historically, the Rocky Flats Nuclear Weapons Plant used large quantities of chemicals in their production operations. The use of solvents, particularly carbon tetrachloride, was unique to Rocky Flats. No investigation of the possible confounding effects of chemical exposures was done in the initial studies. The objectives of the present study are to (1) investigate the history of chemical use at the Rocky Flats facility; (2) locate and analyze chemical monitoring information in order to assess employee exposure to the chemicals that were used in the highest volume; and (3) determine the feasibility of establishing a chemical exposure assessment model that could be used in future epidemiology studies.

Janeen Denise Robertson

1999-02-01T23:59:59.000Z

393

A determination of the power absorbed by flat disks rotating in a liquid  

E-Print Network [OSTI]

A DETERMINATION OF THE POWER ABSORBED BY FLAT DISKS ROTATING IN A LIQUID A Thesis JOHN ROBERT NASSEY Approved as to style and content by Chairman of Committee ~c, Pr. ~ ~a ~- Head of De@'artment of Mechanical Engineering A DETERMINATION... August l952 Ma)or Sub]ectt Mechanical Engineering AC KIOWLEDOWEKT The writer wishes to express appreciation for advice and enoouragement reoeived during the preparation of this thesis from Professors E, S. Holdredge and R. M. Wlngren, TABLF. OF CO...

Massey, John Robert

1952-01-01T23:59:59.000Z

394

Exact solutions to Elko spinors in spatially flat Friedmann-Robertson-Walker spacetimes  

E-Print Network [OSTI]

In this paper we present exact solutions to the so-called Elko spinors for three models of expanding universe, namely the de Sitter, linear and the radiation type evolution. The study was restrict to flat, homogeneous and isotropic Friedmann-Robertson-Walker backgrounds. Starting with an Elko spinor we present the solutions for these cases and compared to the case of Dirac spinors. Besides, an attempt to use Elko spinors as a dark energy candidate in the cosmological context is investigated.

J. M. Hoff da Silva; S. H. Pereira

2014-03-06T23:59:59.000Z

395

Property:OpenEI/UtilityRate/FlatDemandMonth4 | 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 ResourcesLoadingPenobscotInformation Max Jump to:FlatDemandMonth3 Jump to: navigation, search This

396

Property:OpenEI/UtilityRate/FlatDemandMonth5 | 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 ResourcesLoadingPenobscotInformation Max Jump to:FlatDemandMonth3 Jump to: navigation, search

397

Property:OpenEI/UtilityRate/FlatDemandMonth6 | 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 ResourcesLoadingPenobscotInformation Max Jump to:FlatDemandMonth3 Jump to: navigation,

398

Property:OpenEI/UtilityRate/FlatDemandMonth7 | 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 ResourcesLoadingPenobscotInformation Max Jump to:FlatDemandMonth3 Jump to:

399

Wave-plate structures, power selective optical filter devices, and optical systems using same  

DOE Patents [OSTI]

In an embodiment, an optical filter device includes an input polarizer for selectively transmitting an input signal. The device includes a wave-plate structure positioned to receive the input signal, which includes first and second substantially zero-order, zero-wave plates arranged in series with and oriented at an angle relative to each other. The first and second zero-wave plates are configured to alter a polarization state of the input signal passing in a manner that depends on the power of the input signal. Each zero-wave plate includes an entry and exit wave plate each having a fast axis, with the fast axes oriented substantially perpendicular to each other. Each entry wave plate is oriented relative to a transmission axis of the input polarizer at a respective angle. An output polarizer is positioned to receive a signal output from the wave-plate structure and selectively transmits the signal based on the polarization state.

Koplow, Jeffrey P. (San Ramon, CA)

2012-07-03T23:59:59.000Z

400

The Light Velocity Casimir Effect Does the Velocity of Light Increase when Propagating Between the Casimir Plates?  

E-Print Network [OSTI]

We propose experiments that might be set up to detect the increase in the velocity of light in a vacuum in the laboratory frame for photons travelling between (and perpendicular to) the Casimir plates in a vacuum. The Casimir plates are two closely spaced, conductive plates, where an attractive force is observed to exist between the plates called the 'Casimir Force'. We propose that the velocity of light in a vacuum increases when propagating between two transparent Casimir Plates. We call this effect the 'Light Velocity Casimir Effect' or LVC effect. The LVC effect happens because the vacuum energy density in between the plates is lower than that outside the Casimir plates. The conductive plates disallow certain frequencies of electrically charged virtual particles to exist inside the plates, thus lowering the inside vacuum particle density, compared to the density outside the plates. The reduced (electrically charged) virtual particle density results in fewer photon scattering events inside the plates, whic...

Ostoma, T; Ostoma, Tom; Trushyk, Mike

1999-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


401

The variability properties of X-ray steep and X-ray flat quasars  

E-Print Network [OSTI]

We have studied the variability of 6 low redshift, radio quiet `PG' quasars on three timescales (days, weeks, and months) using the ROSAT HRI. The quasars were chosen to lie at the two extreme ends of the ROSAT PSPC spectral index distribution and hence of the H$\\beta$ FWHM distribution. The observation strategy has been carefully designed to provide even sampling on these three basic timescales and to provide a uniform sampling among the quasars We have found clear evidence that the X-ray steep, narrow H_beta, quasars systematically show larger amplitude variations than the X-ray flat broad H_beta quasars on timescales from 2 days to 20 days. On longer timescales we do not find significant differences between steep and flat quasars, although the statistics are poorer. We suggest that the above correlation between variability properties and spectral steepness can be explained in a scenario in which the X-ray steep, narrow line objects are in a higher L/L_Edd state with respect to the X-ray flat, broad line objects. We evaluated the power spectrum of PG1440+356 (the brigthest quasar in our sample) between 2E-7 and 1E-3 Hz, where it goes into the noise. The power spectrum is roughly consistent with a 1/f law between 1E-3 and 2E-6 Hz. Below this frequency it flattens significantly.

Fabrizio Fiore; Ari Laor; Martin Elvis; Fabrizio Nicastro; Emanuele Giallongo

1998-03-20T23:59:59.000Z

402

Finding of no significant impact. Consolidation and interim storage of special nuclear material at Rocky Flats Environmental Technology Site  

SciTech Connect (OSTI)

The Department of Energy (DOE) has prepared an environmental assessment (EA), DOE/EA -- 1060, for the consolidation, processing, and interim storage of Category I and II special nuclear material (SNM) in Building 371 at the Rocky Flats Environmental Technology Site (hereinafter referred to as Rocky Flats or Site), Golden, Colorado. The scope of the EA included alternatives for interim storage including the no action alternative, the construction of a new facility for interim storage at Rocky Flats, and shipment to other DOE facilities for interim storage.

NONE

1995-06-01T23:59:59.000Z

403

Detailed Geophysical Fault Characterization in Yucca Flat, Nevada Test Site, Nevada  

SciTech Connect (OSTI)

Yucca Flat is a topographic and structural basin in the northeastern part of the Nevada Test Site (NTS) in Nye County, Nevada. Between the years 1951 and 1992, 659 underground nuclear tests took place in Yucca Flat; most were conducted in large, vertical excavations that penetrated alluvium and the underlying Cenozoic volcanic rocks. Radioactive and other potential chemical contaminants at the NTS are the subject of a long-term program of investigation and remediation by the U.S. Department of Energy (DOE), National Nuclear Security Administration, Nevada Site Office, under its Environmental Restoration Program. As part of the program, the DOE seeks to assess the extent of contamination and to evaluate the potential risks to humans and the environment from byproducts of weapons testing. To accomplish this objective, the DOE Environmental Restoration Program is constructing and calibrating a ground-water flow model to predict hydrologic flow in Yucca Flat as part of an effort to quantify the subsurface hydrology of the Nevada Test Site. A necessary part of calibrating and evaluating a model of the flow system is an understanding of the location and characteristics of faults that may influence ground-water flow. In addition, knowledge of fault-zone architecture and physical properties is a fundamental component of the containment of the contamination from underground nuclear tests, should such testing ever resume at the Nevada Test Site. The goal of the present investigation is to develop a detailed understanding of the geometry and physical properties of fault zones in Yucca Flat. This study was designed to investigate faults in greater detail and to characterize fault geometry, the presence of fault splays, and the fault-zone width. Integrated geological and geophysical studies have been designed and implemented to work toward this goal. This report describes the geophysical surveys conducted near two drill holes in Yucca Flat, the data analyses performed, and the integrated interpretations developed from the suite of geophysical methodologies utilized in this investigation. Data collection for this activity started in the spring of 2005 and continued into 2006. A suite of electrical geophysical surveys were run in combination with ground magnetic surveys; these surveys resulted in high-resolution subsurface data that portray subsurface fault geometry at the two sites and have identified structures not readily apparent from surface geologic mapping, potential field geophysical data, or surface effects fracture maps.

Theodore H. Asch; Donald Sweetkind; Bethany L. Burton; Erin L. Wallin

2009-02-10T23:59:59.000Z

404

External Peer Review Team Report Underground Testing Area Subproject for Frenchman Flat, Revision 1  

SciTech Connect (OSTI)

An external peer review was conducted to review the groundwater models used in the corrective action investigation stage of the Underground Test Area (UGTA) subproject to forecast zones of potential contamination in 1,000 years for the Frenchman Flat area. The goal of the external peer review was to provide technical evaluation of the studies and to assist in assessing the readiness of the UGTA subproject to progress to monitoring activities for further model evaluation. The external peer review team consisted of six independent technical experts with expertise in geology, hydrogeology,'''groundwater modeling, and radiochemistry. The peer review team was tasked with addressing the following questions: 1. Are the modeling approaches, assumptions, and model results for Frenchman Flat consistent with the use of modeling studies as a decision tool for resolution of environmental and regulatory requirements? 2. Do the modeling results adequately account for uncertainty in models of flow and transport in the Frenchman Flat hydrological setting? a. Are the models of sufficient scale/resolution to adequately predict contaminant transport in the Frenchman Flat setting? b. Have all key processes been included in the model? c. Are the methods used to forecast contaminant boundaries from the transport modeling studies reasonable and appropriate? d. Are the assessments of uncertainty technically sound and consistent with state-of-the-art approaches currently used in the hydrological sciences? 3. Are the datasets and modeling results adequate for a transition to Corrective Action Unit monitoring studies—the next stage in the UGTA strategy for Frenchman Flat? The peer review team is of the opinion that, with some limitations, the modeling approaches, assumptions, and model results are consistent with the use of modeling studies for resolution of environmental and regulatory requirements. The peer review team further finds that the modeling studies have accounted for uncertainty in models of flow and transport in the Frenchman Flat except for a few deficiencies described in the report. Finally, the peer review team concludes that the UGTA subproject has explored a wide range of variations in assumptions, methods, and data, and should proceed to the next stage with an emphasis on monitoring studies. The corrective action strategy, as described in the Federal Facility Agreement and Consent Order, states that the groundwater flow and transport models for each corrective action unit will consider, at a minimum, the following: • Alternative hydrostratigraphic framework models of the modeling domain. • Uncertainty in the radiological and hydrological source terms. • Alternative models of recharge. • Alternative boundary conditions and groundwater flows. • Multiple permissive sets of calibrated flow models. • Probabilistic simulations of transport using plausible sets of alternative framework and recharge models, and boundary and groundwater flows from calibrated flow models. • Ensembles of forecasts of contaminant boundaries. • Sensitivity and uncertainty analyses of model outputs. The peer review team finds that these minimum requirements have been met. While the groundwater modeling and uncertainty analyses have been quite detailed, the peer review team has identified several modeling-related issues that should be addressed in the next phase of the corrective action activities: • Evaluating and using water-level gradients from the pilot wells at the Area 5 Radioactive Waste Management Site in model calibration. • Re-evaluating the use of geochemical age-dating data to constrain model calibrations. • Developing water budgets for the alluvial and upper volcanic aquifer systems in Frenchman Flat. • Considering modeling approaches in which calculated groundwater flow directions near the water table are not predetermined by model boundary conditions and areas of recharge, all of which are very uncertain. • Evaluating local-scale variations in hydraulic conductivity on the calculated contaminant boundaries. • Evaluat

Sam Marutzky

2010-09-01T23:59:59.000Z

405

The plate is not available in electronic format  

Office of Legacy Management (LM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofof EnergyYou$0.C.Green River,The Secretary of Energy 0,The plate

406

Numerical Study of Convective Heat Transfer in Flat Tube Heat Exchangers Operating in Self-Sustained Oscillatory Flow Regimes  

E-Print Network [OSTI]

Laminar, two-dimensional, constant-property numerical simulations of flat tube heat exchanger devices operating in flow regimes in which self-sustained oscillations occur were performed. The unsteady flow regimes were transition flow regimes...

Fullerton, Tracy

2012-02-14T23:59:59.000Z

407

A comparison of workstation dimensions and body postures between 17" CRT, 21" CRT, and 19" flat panel monitors  

E-Print Network [OSTI]

Use of visual display terminals has been implicated as a risk factor in visual discomfort. With the progression of new technology, larger CRT monitors and alternate display technologies, such as flat panels, are entering the office environment. Few...

Walline, Erin Kurusz

2012-06-07T23:59:59.000Z

408

A Flat Histogram Method for Computing the Density of States of Combinatorial Stefano Ermon, Carla Gomes, Bart Selman  

E-Print Network [OSTI]

A Flat Histogram Method for Computing the Density of States of Combinatorial Problems Stefano Ermon of both SAT, MAX- SAT and model counting. We propose a novel Markov Chain Monte Carlo al- gorithm

Keinan, Alon

409

EIS-0277: Management of Certain Plutonium Residues and Scrub Alloy Stored at the Rocky Flats Environmental Technology Site  

Broader source: Energy.gov [DOE]

This EIS evaluates the potential alternatives and impacts associated with a proposal to process certain plutonium residues and all of the scrub alloy currently stored at Rocky Flats. While ongoing...

410

System design and implementation for the glass panel alignment and sealing tool for flat panel displays  

SciTech Connect (OSTI)

This report describes the system designed and fabricated for the National Center for Advanced Information Component Manufacturing (NCAICM) project number 9322-135. The system is a device capable of simultaneously aligning two glass plates and sealing them together with glass frit. The process development was divided into two phases. The first was thermal sealing in an ambient environment. The second was sealing a controlled environment in a vacuum.

Jordan, J.D.; Stromberg, P.G.; Kuszmaul, S.S.

1996-10-16T23:59:59.000Z

411

The thermal Casimir effect for rough metallic plates  

E-Print Network [OSTI]

We propose a new theory of thermal Casimir effect, holding for the experimentally important case of metallic surfaces with a roughness having a spatial scale smaller than the skin depth. The theory is based on a simple phenomenological model for a rough conductor, that explicitly takes account of the fact that ohmic conduction in the immediate vicinity of the surface of a conductor is much impeded by surface roughness, if the amplitude of roughness is smaller than the skin depth. As a result of the new model, we find that surface roughness strongly influences the magnitude of the thermal correction to the Casimir force, independently of the plates separation. Our model, while consistent with recent accurate measurements of the Casimir force in the submicron range, leads to a new prediction for the not yet observed thermal correction to the Casimir force at large plates separation. Besides the thermal Casimir problem, our model is relevant for the correct theoretical interpretation of current experiments probing other proximity effects between conductors, like radiative heat transfer and quantum friction.

G. Bimonte

2007-11-04T23:59:59.000Z

412

Thermodynamics, Structure, and Dynamics of Water Confined between Hydrophobic Plates  

E-Print Network [OSTI]

We perform molecular dynamics simulations of 512 water-like molecules that interact via the TIP5P potential and are confined between two smooth hydrophobic plates that are separated by 1.10 nm. We find that the anomalous thermodynamic properties of water are shifted to lower temperatures relative to the bulk by $\\approx 40$ K. The dynamics and structure of the confined water resemble bulk water at higher temperatures, consistent with the shift of thermodynamic anomalies to lower temperature. Due to this $T$ shift, our confined water simulations (down to $T = 220$ K) do not reach sufficiently low temperature to observe a liquid-liquid phase transition found for bulk water at $T\\approx 215$ K using the TIP5P potential. We find that the different crystalline structures that can form for two different separations of the plates, 0.7 nm and 1.10 nm, have no counterparts in the bulk system, and discuss the relevance to experiments on confined water.

Pradeep Kumar; Sergey V. Buldyrev; Francis W. Starr; Nicolas Giovambattista; H. Eugene Stanley

2005-07-05T23:59:59.000Z

413

Waste Minimization Plans and activities in the MFD Plating Shop  

SciTech Connect (OSTI)

The Plating Shop (Building 322), provides processes such as electroplating, electroless plating, anodizing, cleaning, etching, electroforming and chemical milling. We in MFD are committed to an active program on waste minimization, and the purpose of this document is to outline the plan of action. Our short range minimization goals are threefold: (1) Reduce our major waste stream by 90%, (2) Minimize discharge of rinse water to sewer system, and (3) Eliminate vapor degreasing in the shop. The intermediate goals consist of characterizing the waste streams and evaluating recovery processes. To do this, we first need to have the distillation unit operational and time to determine its effectiveness. If it proves to be as effective as we anticipate, we will perhaps purchase a second unit. Regardless, the streams that we can identify include: nickel, copper, rinses, acids, alkalies, electropolish and miscellaneous. Our goal is to utilize electrolytic processes to recover metals such as nickel and copper and processes such as ion exchange for some of the other streams. We intend to evaluate the full gamut of recycling processes available for these streams. We anticipate completing this phase of the minimization program by January 1993. The long range goal is zero discharge or since this could prove extremely difficult, development of processes that will allow us to produce a sludge cake that could be handled by our Hazardous Waste Management Group.

Dini, J.W.; Steffani, C.P.

1991-02-01T23:59:59.000Z

414

Heat Pipe Embedded AlSiC Plates for High Conductivity - Low CTE Heat Spreaders  

SciTech Connect (OSTI)

Heat pipe embedded aluminum silicon carbide (AlSiC) plates are innovative heat spreaders that provide high thermal conductivity and low coefficient of thermal expansion (CTE). Since heat pipes are two phase devices, they demonstrate effective thermal conductivities ranging between 50,000 and 200,000 W/m-K, depending on the heat pipe length. Installing heat pipes into an AlSiC plate dramatically increases the plate’s effective thermal conductivity. AlSiC plates alone have a thermal conductivity of roughly 200 W/m-K and a CTE ranging from 7-12 ppm/ deg C, similar to that of silicon. An equivalent sized heat pipe embedded AlSiC plate has effective thermal conductivity ranging from 400 to 500 W/m-K and retains the CTE of AlSiC.

Johnson, Matthew (DOE/NNSA Kansas City Plant (United States)); Weyant, J.; Garner, S. (Advanced Cooling Technologies, Inc. (Lancaster, PA (United States)); Occhionero, M. (CPS Technologies Corporation, Norton, MA (United States))

2010-01-07T23:59:59.000Z

415

Adsorption of branched and dendritic polymers onto flat surfaces: A Monte Carlo study  

SciTech Connect (OSTI)

Using Monte Carlo simulations based on the bond fluctuation model we study the adsorption of starburst dendrimers with flexible spacers onto a flat surface. The calculations are performed for various generation number G and spacer length S in a wide range of the reduced temperature ? as the measure of the interaction strength between the monomers and the surface. Our simulations indicate a two-step adsorption scenario. Below the critical point of adsorption, ?{sub c}, a weakly adsorbed state of the dendrimer is found. Here, the dendrimer retains its shape but sticks to the surface by adsorbed spacers. By lowering the temperature below a spacer-length dependent value, ?*(S) < ?{sub c}, a step-like transition into a strongly adsorbed state takes place. In the flatly adsorbed state the shape of the dendrimer is well described by a mean field model of a dendrimer in two dimensions. We also performed simulations of star-polymers which display a simple crossover-behavior in full analogy to linear chains. By analyzing the order parameter of the adsorption transition, we determine the critical point of adsorption of the dendrimers which is located close to the critical point of adsorption for star-polymers. While the order parameter for the adsorbed spacers displays a critical crossover scaling, the overall order parameter, which combines both critical and discontinuous transition effects, does not display simple scaling. The step-like transition from the weak into the strong adsorbed regime is confirmed by analyzing the shape-anisotropy of the dendrimers. We present a mean-field model based on the concept of spacer adsorption which predicts a discontinuous transition of dendrimers due to an excluded volume barrier. The latter results from an increased density of the dendrimer in the flatly adsorbed state which has to be overcome before this state is thermodynamically stable.

Sommer, J.-U. [Leibniz Institute of Polymer Research Dresden e. V., 01069 Dresden (Germany) [Leibniz Institute of Polymer Research Dresden e. V., 01069 Dresden (Germany); Institute for Theoretical Physics, Technische Universität Dresden, 01069 Dresden (Germany); K?os, J. S. [Leibniz Institute of Polymer Research Dresden e. V., 01069 Dresden (Germany) [Leibniz Institute of Polymer Research Dresden e. V., 01069 Dresden (Germany); Faculty of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Pozna? (Poland); Mironova, O. N. [Leibniz Institute of Polymer Research Dresden e. V., 01069 Dresden (Germany)] [Leibniz Institute of Polymer Research Dresden e. V., 01069 Dresden (Germany)

2013-12-28T23:59:59.000Z

416

Exact formulas for random growth with half-flat initial data  

E-Print Network [OSTI]

We obtain exact formulas for moments and generating functions of the height function of the asymmetric simple exclusion process at one spatial point, starting from special initial data in which every positive even site is initially occupied. These complement earlier formulas of E. Lee [Lee10] but, unlike those formulas, ours are suitable in principle for asymptotics. We also explain how our formulas are related to divergent series formulas for half-flat KPZ of Le Doussal and Calabrese [LDC12], which we also recover using the methods of this paper. In the long time limit, formal asymptotics show that the fluctuations are given by the Airy$_{2\\to1}$ marginals.

Janosch Ortmann; Jeremy Quastel; Daniel Remenik

2015-01-20T23:59:59.000Z

417

Computerization upgrade project for the Rocky Flats Plant Critical Mass Laboratory Reactor Control Console  

SciTech Connect (OSTI)

This report discusses present and planned future work on computerization of the Rocky Flats Plant (RFP) Critical Mass Laboratory (CML) Nuclear Reactor Control Console. No computerized control functions are planned or anticipated at this time. The scope of this computerization effort is limited to Data Acquisition and Analysis. In this work an IBM-PC will be connected to four (4) Nuclear Safety channels, and two (2) nonnuclear safety channels. Programming is being done in interpretive advanced BASIC. At the present time only two channels, Linear Picoammeters 1 and 2, are having their signals processed by the IBM-PC.

Bachman, H.C.; Miles, R.E.; Sachs, R.D.

1987-01-01T23:59:59.000Z

418

Stability of Non-asymptotically flat thin-shell wormholes in generalized dilaton-axion gravity  

E-Print Network [OSTI]

We construct a new type of thin-shell wormhole for non-asymptotically flat charged black holes in generalized dilaton-axion gravity inspired by low-energy string theory using cut-and-paste technique. We have shown that this thin shell wormhole is stable. The most striking feature of our model is that the total amount of exotic matter needed to support the wormhole can be reduced as desired with the suitable choice of the value of a parameter. Various other aspects of thin-shell wormhole are also analyzed.

Ayan Banerjee; Farook Rahaman; Surajit Chattopadhyay; Sumita Banerjee

2013-04-11T23:59:59.000Z

419

Surficial Geology and Landscape Development in Northern Frenchman Flat, Interim Summary and Soil Data  

SciTech Connect (OSTI)

This report summarizes geologic studies by Raytheon Services Nevada near the Area 5 Radioactive Waste Management Site at the Nevada Test Site. These studies are part of a program to satisfy data needs of (1) the Greater Confinement Disposal (GCD) Program Performance Assessment (PA), (2) the low-level waste (LLW) PA, and (3) the Resource Conservation and Recovery Act (RCRA) permit application. The geologic studies were integrated into a single program that worked toward a landscape evolution model of northern Frenchman Flat, with more detailed geologic studies of particular topics as needed. Only the Holocene tectonism and surficial geology components of the landscape model are presented in this report.

Raytheon Services Nevada Environmental Restoration and Waste Management Division

1995-09-01T23:59:59.000Z

420

A quantum weak energy inequality for the Dirac field in two-dimensional flat spacetime  

E-Print Network [OSTI]

Fewster and Mistry have given an explicit, non-optimal quantum weak energy inequality that constrains the smeared energy density of Dirac fields in Minkowski spacetime. Here, their argument is adapted to the case of flat, two-dimensional spacetime. The non-optimal bound thereby obtained has the same order of magnitude, in the limit of zero mass, as the optimal bound of Vollick. In contrast with Vollick's bound, the bound presented here holds for all (non-negative) values of the field mass.

S. P. Dawson

2005-12-14T23:59:59.000Z

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


421

Rebaselining seismic risks for resumption of Building 707 plutonium operations at the Rocky Flats Plant  

SciTech Connect (OSTI)

Natural phenomena risks have been assessed for plutonium handling facilities at the Rocky Flats Plant, based on numerous studies performed for the Department of Energy Natural Phenomena Hazards Project. The risk assessment was originally utilized in the facilities Final Safety Analysis Reports and in subsequent risk management decisions. Plutonium production operations were curtailed in 1989 in order for a new operating contractor to implement safety improvements. Since natural phenomena events dominated risks to the public, a re-assessment of these events were undertaken for resumption of plutonium operations.

Elia, F. Jr. [Stone and Webster Engineering Corp., Boston, MA (United States); Foppe, T.; Stahlnecker, E. [EG and G Rocky Flats, Inc., Golden, CO (United States)

1993-08-01T23:59:59.000Z

422

2-M Probe At Gabbs Alkali Flat Area (Kratt, Et Al., 2008) | Open Energy  

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 REPORTOpenWende NewSowitec doWinvest HomeInformation Gabbs Alkali Flat

423

Property:OpenEI/UtilityRate/FlatDemandMonth3 | 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 ResourcesLoadingPenobscotInformation Max Jump to:FlatDemandMonth3 Jump to: navigation, search This is

424

Corrosion-resistant, electrically-conductive plate for use in a fuel cell stack  

DOE Patents [OSTI]

A corrosion resistant, electrically-conductive, durable plate at least partially coated with an anchor coating and a corrosion resistant coating. The corrosion resistant coating made of at least a polymer and a plurality of corrosion resistant particles each having a surface area between about 1-20 m.sup.2/g and a diameter less than about 10 microns. Preferably, the plate is used as a bipolar plate in a proton exchange membrane (PEMFC) fuel cell stack.

Carter, J. David (Bolingbrook, IL); Mawdsley, Jennifer R. (Woodridge, IL); Niyogi, Suhas (Woodridge, IL); Wang, Xiaoping (Naperville, IL); Cruse, Terry (Lisle, IL); Santos, Lilia (Lombard, IL)

2010-04-20T23:59:59.000Z

425

DETAILED LOOP MODEL (DLM) ANALYSIS OF LIQUID SOLAR THERMOSIPHONS WITH HEAT EXCHANGERS  

E-Print Network [OSTI]

L(~/d)eq a resistance to summation equivalent length specia resistance to flow in pipe (Ł/d)eq equivalent length

Mertol, A.

2013-01-01T23:59:59.000Z

426

DETAILED LOOP MODEL (DLM) ANALYSIS OF LIQUID SOLAR THERMOSIPHONS WITH HEAT EXCHANGERS  

E-Print Network [OSTI]

of Solar Domestic Hot Water Heaters in California,n inBradley, J.M. , Water Heater Construe on. u AdministrationDevelopment of a erant Solar Water Heater Using Crosslinked

Mertol, A.

2013-01-01T23:59:59.000Z

427

DETAILED LOOP MODEL (DLM) ANALYSIS OF LIQUID SOLAR THERMOSIPHONS WITH HEAT EXCHANGERS  

E-Print Network [OSTI]

a Collector- Cum-Storage Type of ar Water Heater, 11 SolarSolar Water Heater of the Combined Collector and Storagethermosiphon water heaters with heat exchangers in storage

Mertol, A.

2013-01-01T23:59:59.000Z

428

Evaluation of Novel and Low-Cost Materials for Bipolar Plates in PEM Fuel Cells.  

E-Print Network [OSTI]

??Bipolar plate material and fabrication costs make up a significant fraction of the total cost in a polymer electrolyte membrane fuel cell stack. In an… (more)

Desrosiers, Kevin Campbell

2002-01-01T23:59:59.000Z

429

Characteristics of countercurrent vapor-liquid flow at a perforated plate  

E-Print Network [OSTI]

of heat-sens1tive materials. Also, a column with low liqu1d holdup is more responsive to operating controls than 1s a column conta1n- 1ng a large inventory of liquid. It was found that for the plates having hole areas of 23 and 40 per cent... to the plate above by the impetus of the vapor Jetting through the liquid on the plate. In this case, the velocity of the vapor through the holes in the plate, (or slots, in the case of bubble-caps) would be the 38 controlling factor. This mechanism...

Sutherland, Samuel Shelton

2012-06-07T23:59:59.000Z

430

Variables Affecting Smooth Particle Hydrodynamics Simulation of High-Velocity Flyer Plate Impact Experiments  

SciTech Connect (OSTI)

This paper describes our work to characterize the variables affecting the smoothed particle hydrodynamics (SPH) method in the LS-DYNA package for simulating high-velocity flyer plate impact experiments. LS-DYNA simulations are compared with one-dimensional experimental data of an oxygen-free high-conductivity (OFHC) copper flyer plate impacting another plate of the same material. The comparison is made by measuring the velocity of a point on the back surface of the impact plate using the velocity interferometer system for any reflector (VISAR) technique.

Somasundaram, Deepak S [UNLV; Trabia, Mohamed [UNLV; O'Toole, Brendan [UNLV; Hixson, Robert S [NSTec

2014-01-23T23:59:59.000Z

431

E-Print Network 3.0 - auto-catalytic electroless plating Sample...  

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

electroless plating Page: << < 1 2 3 4 5 > >> 1 Preparation of highly dispersed PEM fuel cell catalysts using electroless deposition methods Summary: (ED). ED is a catalytic...

432

The fabrication of a heterogeneous composite bipolar plate with 3D printing technique.  

E-Print Network [OSTI]

??Bipolar plates used in a PEMFC must have high electric conductivity, good mechanical and chemical stability, low gas permeability, and low cost. For portable applications,… (more)

Jian, Siang-he

2014-01-01T23:59:59.000Z

433

A NEW PEMFC FLOW FIELD PLATE OPTIMIZATION COMPARISON - ANSYS FLUENT FUEL-CELL SIMULATION.  

E-Print Network [OSTI]

??The performance of a new cathode flow field plate located on a PEM fuel cell was compared to an industry standard and optimal serpentine design… (more)

Soueidan, Ahmed Yassin

2012-01-01T23:59:59.000Z

434

Building 9401-2 Plating Shop Surveillance and Maintenance Plan  

SciTech Connect (OSTI)

This document provides a plan for implementing surveillance and maintenance (S and M) activities to ensure that Building 9401-2 Plating Shop is maintained in a cost effective and environmentally secure configuration until subsequent closure during the final disposition phase of decommissioning. U.S. Department of Energy (DOE) G430.1A-2, Surveillance and Maintenance During Facility Disposition (1997), was used as guidance in the development of this plan. The S and M Plan incorporates DOE O 430.1A, Life Cycle Asset Management (LCAM) (1998a) direction to provide for conducting surveillance and maintenance activities required to maintain the facility and remaining hazardous and radioactive materials, wastes, and contamination in a stable and known condition pending facility disposition. Recommendations in the S and M plan have been made that may not be requirement-based but would reduce the cost and frequency of surveillance and maintenance activities. During the course of S and M activities, the facility's condition may change so as to present an immediate or developing hazard or unsatisfactory condition. Corrective action should be coordinated with the appropriate support organizations using the requirements and guidance stated in procedure Y10-202, Rev. 1, Integrated Safety Management Program, (Lockheed Martin Energy Systems, Inc. (LMES), 1998a) implemented at the Oak Ridge Y-12 Plant and the methodology of the Nuclear Operations Conduct of Operations Manual (LMES, 1999) for the Depleted Uranium Operations (DUO) organization. The key S and M objectives applicable to the Plating Shop are to: Ensure adequate containment of remaining residual material in exhaust stacks and outside process piping, stored chemicals awaiting offsite shipment, and items located in the Radioactive Material Area (RMA); Provide access control into the facility and physical safety to S and M personnel; Maintain the facility in a manner that will protect the public, the environment, and the S and M personnel; Provide an S and M plan which identifies and complies with applicable environmental, safety, and health safeguards and security requirements; and Provide a cost effective S and M program for the plating shop, Building 9401-2.

None

1999-05-01T23:59:59.000Z

435

Evaluation of Rocky Flats Plant stored plutonium inventory at the Idaho National Engineering Laboratory  

SciTech Connect (OSTI)

The purpose of this document is to evaluate reported inventories of plutonium contained in stored transuranic (TRU) waste generated by the Rocky Flats Plant (RFP). From 1970 to 1989, this waste was shipped to the Idaho National Engineering Laboratory (INEL) and placed in aboveground retrievable storage at the Radioactive Waste Management Complex (RWMC)-Transuranic Storage Area (TSA). This evaluation was initiated to address potential uncertainty in quantities of stored plutonium reported in the Radioactive Waste Management Information System (RWMIS). The RWMIS includes radionuclide information from generators that shipped TRU waste to INEL for storage. Recent evaluations performed on buried TRU waste (1954-1970) resulted in significant revision to the original reported values of plutonium, americium, and enriched uranium. These evaluations were performed based on Rocky Flats Plant (RFP) Inventory Difference (ID) records. This evaluation for stored TRU waste was performed to: (1) identify if significant discrepancies exist between RWMIS reported values and RFP ID records, (2) describe the methodology used to perform the RWMIS evaluation, (3) determine a Best Estimate (BE) and 95% Upper Confidence Bound (UB) on the plutonium inventory, (4) provide conclusions based on this evaluation, and (5) identify recommendations and/or actions that might be needed.

Clements, T.L. Jr.; Einerson, J.J.

1995-09-01T23:59:59.000Z

436

A flat-cathode thermionic injector for the PHERMEX Radiographic Facility  

SciTech Connect (OSTI)

The PHERMEX (Pulsed High-Energy Radiographic Machine Emitting X-rays) standing-wave linear accelerator is a high-current electron beam generator used for flash-radiography. An improved electron gun has been designed employing a flat-thermionic cathode to replace the existing Pierce-geometry gun. The flat cathode yields increased current with the same applied voltage and cathode area as the Pierce gun. The ISIS code simulations indicate a beam current of 1.5 kA at 600 kV. The new geometry also reduces the probability for high voltage breakdown in the A-K gap. A reentrant magnet captures the expanding electron beam and a bucking coil nulls cathode-tinge field. A third coil is used to optimize the extraction field profile and reduce the effect of nonlinear space charge on the beam emittance. Time-resolved measurements of beam current and voltage have been made. In addition, a streak camera was used to measure beam emittance and spatial profile. Comparisons of measurements with simulations are presented.

Kauppila, T.; Builta, L.; Burns, M.; Gregory, W.; Honaberger, D.; Watson, S. (Los Alamos National Lab., NM (United States)); Hughes, T. (Mission Research Corp., Albuquerque, NM (United States))

1993-01-01T23:59:59.000Z

437

A flat-cathode thermionic injector for the PHERMEX Radiographic Facility  

SciTech Connect (OSTI)

The PHERMEX (Pulsed High-Energy Radiographic Machine Emitting X-rays) standing-wave linear accelerator is a high-current electron beam generator used for flash-radiography. An improved electron gun has been designed employing a flat-thermionic cathode to replace the existing Pierce-geometry gun. The flat cathode yields increased current with the same applied voltage and cathode area as the Pierce gun. The ISIS code simulations indicate a beam current of 1.5 kA at 600 kV. The new geometry also reduces the probability for high voltage breakdown in the A-K gap. A reentrant magnet captures the expanding electron beam and a bucking coil nulls cathode-tinge field. A third coil is used to optimize the extraction field profile and reduce the effect of nonlinear space charge on the beam emittance. Time-resolved measurements of beam current and voltage have been made. In addition, a streak camera was used to measure beam emittance and spatial profile. Comparisons of measurements with simulations are presented.

Kauppila, T.; Builta, L.; Burns, M.; Gregory, W.; Honaberger, D.; Watson, S. [Los Alamos National Lab., NM (United States); Hughes, T. [Mission Research Corp., Albuquerque, NM (United States)

1993-06-01T23:59:59.000Z

438

Environmental Assessment for the LGF Spill Test Facility at Frenchman Flat, Nevada Test Site  

SciTech Connect (OSTI)

The LGF Spill Test Facility at Frenchman Flat, Nevada Test Site, is being constructed by the United States Department of Energy (DOE). In this Environmental Assessment, environmental consequences of spilling hazardous materials in the Frenchman Flat basin are evaluated and mitigations and recommendations are stated in order to protect natural resources and reduce land-use impacts. Guidelines and restrictions concerning spill-test procedures will be determined by the LGF Test Facility Operations Manager and DOE based on toxicity documentation for the test material, provided by the user, and mitigations imposed by the Environmental Assessment. In addition to Spill Test Facility operational procedures, certain assumptions have been made in preparation of this document: no materials will be considered for testing that have cumulative, long-term persistence in the environment; spill tests will consist of releases of 15 min or less; and sufficient time will be allowed between tests for recovery of natural resources. Geographic limits to downwind concentrations of spill materials were primarily determined from meteorological data, human occupational exposure standards to hazardous materials and previous spill tests. These limits were established using maximum spill scenarios and environmental impacts are discussed as worst case scenarios; however, spill-test series will begin with smaller spills, gradually increasing in size after the impacts of the initial tests have been evaluated.

Patton, S.E.; Novo, M.G.; Shinn, J.H.

1986-04-01T23:59:59.000Z

439

The Identification of EGRET Sources with Flat-Spectrum Radio Sources  

E-Print Network [OSTI]

We present a method to assess the reliability of the identification of EGRET sources with extragalactic radio sources. We verify that EGRET is detecting the blazar class of AGN. However, many published identifications are found to be questionable. We provide a table of 42 blazars which we expect to be robust identifications of EGRET sources. This includes one previously unidentified EGRET source, the lensed AGN PKS 1830-210 near the direction of the Galactic center. We provide the best available positions for 16 more radio sources which are also potential identifications for previously unidentified EGRET sources. All high Galactic latitude EGRET sources (b>3 degrees) which demonstrate significant variability can be identified with flat spectrum radio sources. This suggests that EGRET is not detecting any type of AGN other than blazars. This identification method has been used to establish with 99.998% confidence that the peak gamma-ray flux of a blazar is correlated with its average 5 GHz radio flux. An even better correlation is seen between gamma-ray flux and the 2.29 GHz flux density measured with VLBI at the base of the radio jet. Also, using high confidence identifications, we find that the radio sources identified with EGRET sources have larger correlated VLBI flux densities than the parent population of flat radio spectrum sources.

J. R. Mattox; J. Schachter; L. Molnar; R. C. Hartman; A. R. Patnaik

1996-12-18T23:59:59.000Z

440

Modeling Approach/Strategy for Corrective Action Unit 97, Yucca Flat and Climax Mine , Revision 0  

SciTech Connect (OSTI)

The objectives of the UGTA corrective action strategy are to predict the location of the contaminant boundary for each CAU, develop and implement a corrective action, and close each CAU. The process for achieving this strategy includes modeling to define the maximum extent of contaminant transport within a specified time frame. Modeling is a method of forecasting how the hydrogeologic system, including the underground test cavities, will behave over time with the goal of assessing the migration of radionuclides away from the cavities and chimneys. Use of flow and transport models to achieve the objectives of the corrective action strategy is specified in the FFACO. In the Yucca Flat/Climax Mine system, radionuclide migration will be governed by releases from the cavities and chimneys, and transport in alluvial aquifers, fractured and partially fractured volcanic rock aquifers and aquitards, the carbonate aquifers, and in intrusive units. Additional complexity is associated with multiple faults in Yucca Flat and the need to consider reactive transport mechanisms that both reduce and enhance the mobility of radionuclides. A summary of the data and information that form the technical basis for the model is provided in this document.

Janet Willie

2003-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


441

Surface modified stainless steels for PEM fuel cell bipolar plates  

DOE Patents [OSTI]

A nitridation treated stainless steel article (such as a bipolar plate for a proton exchange membrane fuel cell) having lower interfacial contact electrical resistance and better corrosion resistance than an untreated stainless steel article is disclosed. The treated stainless steel article has a surface layer including nitrogen-modified chromium-base oxide and precipitates of chromium nitride formed during nitridation wherein oxygen is present in the surface layer at a greater concentration than nitrogen. The surface layer may further include precipitates of titanium nitride and/or aluminum oxide. The surface layer in the treated article is chemically heterogeneous surface rather than a uniform or semi-uniform surface layer exclusively rich in chromium, titanium or aluminum. The precipitates of titanium nitride and/or aluminum oxide are formed by the nitriding treatment wherein titanium and/or aluminum in the stainless steel are segregated to the surface layer in forms that exhibit a low contact resistance and good corrosion resistance.

Brady, Michael P [Oak Ridge, TN; Wang, Heli [Littleton, CO; Turner, John A [Littleton, CO

2007-07-24T23:59:59.000Z

442

Development of Glass Resistive Plate Chambers for INO  

E-Print Network [OSTI]

The India-based Neutrino Observatory (INO) collaboration is planning to build a massive 50kton magnetised Iron Calorimeter (ICAL) detector, to study atmospheric neutrinos and to make precision measurements of the parameters related to neutrino oscillations. Glass Resistive Plate Chambers (RPCs) of about 2m X 2m in size are going to be used as active elements for the ICAL detector. We have fabricated a large number of glass RPC prototypes of 1m X 1m in size and have studied their performance and long term stability. In the process, we have developed and produced a number of materials and components required for fabrication of RPCs. We have also designed and optimised a number of fabrication and quality control procedures for assembling the gas gaps. In this paper we will review our activities towards development of glass RPCs for the INO ICAL detector and will present results of the characterisation studies of the RPCs.

Satyanarayana Bheesette; for the INO collaboration

2008-10-26T23:59:59.000Z

443

Study of electroless nickel plating of ceramic particles  

SciTech Connect (OSTI)

In the production of aluminum-based metal matrix composites (MMC), the wettability of the reinforcement particulates by the matrix is an important factor. The manufacture of MMC reinforced with alumina particles require the use of specialized fabrication techniques such as rheocasting in order to achieve effective particle incorporation. Several surface treatments have been applied to alumina and other reinforcement particulates in order to modify particle wettability. The aim of this study was to investigate the deposition of Ni-P onto several ceramic particulate surfaces without the use of the conventional sensitization and activation steps. This nickel plating treatment, had the potential to improve the incorporation of alumina particles in aluminum melts, with respect to MMC formation by the plasma transferred arc (PTA) surfacing process.

Deuis, R.L.; Subramanian, C.; Strafford, K.N.; Arora, P. [Univ. of South Australia (Australia)] [Univ. of South Australia (Australia); Yellup, J.M. [CSIRO, Woodville North, South Australia (Australia). Div. of Manufacturing Technology] [CSIRO, Woodville North, South Australia (Australia). Div. of Manufacturing Technology

1995-10-15T23:59:59.000Z

444

Phase plate technology for laser marking of magnetic discs  

DOE Patents [OSTI]

An advanced design for a phase plate enables the distribution of spots in arbitrarily shaped patterns with very high uniformity and with a continuously or near-continuously varying phase pattern. A continuous phase pattern eliminates large phase jumps typically expected in a grating that provides arbitrary shapes. Large phase jumps increase scattered light outside of the desired pattern, reduce efficiency and can make the grating difficult to manufacture. When manufacturing capabilities preclude producing a fully continuous grating, the present design can be easily adapted to minimize manufacturing errors and maintain high efficiencies. This continuous grating is significantly more efficient than previously described Dammann gratings, offers much more flexibility in generating spot patterns and is easier to manufacture and replicate than a multi-level phase grating. 3 figs.

Neuman, B.; Honig, J.; Hackel, L.; Dane, C.B.; Dixit, S.

1998-10-27T23:59:59.000Z

445

Current conducting end plate of fuel cell assembly  

DOE Patents [OSTI]

A fuel cell assembly has a current conducting end plate with a conductive body formed integrally with isolating material. The conductive body has a first surface, a second surface opposite the first surface, and an electrical connector. The first surface has an exposed portion for conducting current between a working section of the fuel cell assembly and the electrical connector. The isolating material is positioned on at least a portion of the second surface. The conductive body can have support passage(s) extending therethrough for receiving structural member(s) of the fuel cell assembly. Isolating material can electrically isolate the conductive body from the structural member(s). The conductive body can have service passage(s) extending therethrough for servicing one or more fluids for the fuel cell assembly. Isolating material can chemically isolate the one or more fluids from the conductive body. The isolating material can also electrically isolate the conductive body from the one or more fluids.

Walsh, Michael M. (Fairfield, CT)

1999-01-01T23:59:59.000Z

446

Oscillation modes of dc microdischarges with parallel-plate geometry  

E-Print Network [OSTI]

Two different oscillation modes in microdischarge with parallel-plate geometry has been observed: relaxation oscillations with frequency range between 1.23 and 2.1 kHz and free-running oscillations with 7 kHz frequency. The oscillation modes are induced by increasing power supply voltage or discharge current. For a given power supply voltage, there is a spontaneous transition from one to other oscillation mode and vice versa. Before the transition from relaxation to free-running oscillations, the spontaneous increase of oscillation frequency of relaxation oscillations form 1.3 kHz to 2.1 kHz is measured. Fourier Transform Spectra of relaxation oscillations reveal chaotic behaviour of microdischarge. Volt-Ampere characteristics associated with relaxation oscillations describes periodical transition between low current, diffuse discharge and normal glow. However, free-running oscillations appear in subnormal glow only.

Stefanovi?, Ilija; Škoro, Nikola; Mari?, Dragana; Petrovi?, Zoran Lj; Winter, Jörg

2011-01-01T23:59:59.000Z

447

Drying studies for corroded DOE aluminum plate fuels  

SciTech Connect (OSTI)

The Idaho National Engineering Laboratory (INEL) currently stores a wide variety of spent nuclear fuel. The fuel was originally intended to be stored underwater for a short period of thermal cooling, then removed and reprocessed. However, it has been stored underwater for much longer thank originally anticipated. During this time dust and airborne desert soil have entered the oldest INEL pool, accumulating on the fuel. Also, the aluminum fuel cladding has corroded compromising the exposed surfaces of the fuel. Plans are now underway to move some the the more vulnerable aluminum plate type fuels into dry storage in an existing vented and filtered fuel storage facility. In preparation for dry storage of the fuel a drying and canning station is being built at the INEL. The two primary objectives of this facility are to determine the influence of corrosion products on the drying process and to establish temperature distribution inside the canister during heating.

Lords, R.E.; Windes, W.E. [Idaho National Engineering Lab., Idaho Falls, ID (United States); Crepeau, J.C.; Sidwell, R.W. [Idaho Univ., Idaho Falls, ID (United States) Dept. of Mechanical Engineering

1996-05-01T23:59:59.000Z

448

Phase plate technology for laser marking of magnetic discs  

DOE Patents [OSTI]

An advanced design for a phase plate enables the distribution of spots in arbitrarily shaped patterns with very high uniformity and with a continuously or near-continuously varying phase pattern. A continuous phase pattern eliminates large phase jumps typically expected in a grating that provides arbitrary shapes. Large phase jumps increase scattered light outside of the desired pattern, reduce efficiency and can make the grating difficult to manufacture. When manufacturing capabilities preclude producing a fully continuous grating, the present design can be easily adapted to minimize manufacturing errors and maintain high efficiencies. This continuous grating is significantly more efficient than previously described Dammann gratings, offers much more flexibility in generating spot patterns and is easier to manufacture and replicate than a multi-level phase grating.

Neuman, Bill (Livermore, CA); Honig, John (Livermore, CA); Hackel, Lloyd (Livermore, CA); Dane, C. Brent (Livermore, CA); Dixit, Shamasundar (Livermore, CA)

1998-01-01T23:59:59.000Z

449

Collimator application for microchannel plate image intensifier resolution improvement  

DOE Patents [OSTI]

A collimator is included in a microchannel plate image intensifier (MCPI). Collimators can be useful in improving resolution of MCPIs by eliminating the scattered electron problem and by limiting the transverse energy of electrons reaching the screen. Due to its optical absorption, a collimator will also increase the extinction ratio of an intensifier by approximately an order of magnitude. Additionally, the smooth surface of the collimator will permit a higher focusing field to be employed in the MCP-to-collimator region than is currently permitted in the MCP-to-screen region by the relatively rough and fragile aluminum layer covering the screen. Coating the MCP and collimator surfaces with aluminum oxide appears to permit additional significant increases in the field strength, resulting in better resolution.

Thomas, Stanley W. (Livermore, CA)

1996-02-27T23:59:59.000Z

450

Sensor network based vehicle classification and license plate identification system  

SciTech Connect (OSTI)

Typically, for energy efficiency and scalability purposes, sensor networks have been used in the context of environmental and traffic monitoring applications in which operations at the sensor level are not computationally intensive. But increasingly, sensor network applications require data and compute intensive sensors such video cameras and microphones. In this paper, we describe the design and implementation of two such systems: a vehicle classifier based on acoustic signals and a license plate identification system using a camera. The systems are implemented in an energy-efficient manner to the extent possible using commercially available hardware, the Mica motes and the Stargate platform. Our experience in designing these systems leads us to consider an alternate more flexible, modular, low-power mote architecture that uses a combination of FPGAs, specialized embedded processing units and sensor data acquisition systems.

Frigo, Janette Rose [Los Alamos National Laboratory; Brennan, Sean M [Los Alamos National Laboratory; Rosten, Edward J [Los Alamos National Laboratory; Raby, Eric Y [Los Alamos National Laboratory; Kulathumani, Vinod K [WEST VIRGINIA UNIV.

2009-01-01T23:59:59.000Z

451

Collimator application for microchannel plate image intensifier resolution improvement  

DOE Patents [OSTI]

A collimator is included in a microchannel plate image intensifier (MCPI). Collimators can be useful in improving resolution of MCPIs by eliminating the scattered electron problem and by limiting the transverse energy of electrons reaching the screen. Due to its optical absorption, a collimator will also increase the extinction ratio of an intensifier by approximately an order of magnitude. Additionally, the smooth surface of the collimator will permit a higher focusing field to be employed in the MCP-to-collimator region than is currently permitted in the MCP-to-screen region by the relatively rough and fragile aluminum layer covering the screen. Coating the MCP and collimator surfaces with aluminum oxide appears to permit additional significant increases in the field strength, resulting in better resolution. 2 figs.

Thomas, S.W.

1996-02-27T23:59:59.000Z

452

Modeling pore corrosion in normally open gold- plated copper connectors.  

SciTech Connect (OSTI)

The goal of this study is to model the electrical response of gold plated copper electrical contacts exposed to a mixed flowing gas stream consisting of air containing 10 ppb H{sub 2}S at 30 C and a relative humidity of 70%. This environment accelerates the attack normally observed in a light industrial environment (essentially a simplified version of the Battelle Class 2 environment). Corrosion rates were quantified by measuring the corrosion site density, size distribution, and the macroscopic electrical resistance of the aged surface as a function of exposure time. A pore corrosion numerical model was used to predict both the growth of copper sulfide corrosion product which blooms through defects in the gold layer and the resulting electrical contact resistance of the aged surface. Assumptions about the distribution of defects in the noble metal plating and the mechanism for how corrosion blooms affect electrical contact resistance were needed to complete the numerical model. Comparisons are made to the experimentally observed number density of corrosion sites, the size distribution of corrosion product blooms, and the cumulative probability distribution of the electrical contact resistance. Experimentally, the bloom site density increases as a function of time, whereas the bloom size distribution remains relatively independent of time. These two effects are included in the numerical model by adding a corrosion initiation probability proportional to the surface area along with a probability for bloom-growth extinction proportional to the corrosion product bloom volume. The cumulative probability distribution of electrical resistance becomes skewed as exposure time increases. While the electrical contact resistance increases as a function of time for a fraction of the bloom population, the median value remains relatively unchanged. In order to model this behavior, the resistance calculated for large blooms has been weighted more heavily.

Battaile, Corbett Chandler; Moffat, Harry K.; Sun, Amy Cha-Tien; Enos, David George; Serna, Lysle M.; Sorensen, Neil Robert

2008-09-01T23:59:59.000Z

453

EVALUATION OF U10MO FUEL PLATE IRRADIATION BEHAVIOR VIA NUMERICAL AND EXPERIMENTAL BENCHMARKING  

SciTech Connect (OSTI)

This article analyzes dimensional changes due to irradiation of monolithic plate-type nuclear fuel and compares results with finite element analysis of the plates during fabrication and irradiation. Monolithic fuel plates tested in the Advanced Test Reactor (ATR) at Idaho National Lab (INL) are being used to benchmark proposed fuel performance for several high power research reactors. Post-irradiation metallographic images of plates sectioned at the midpoint were analyzed to determine dimensional changes of the fuel and the cladding response. A constitutive model of the fabrication process and irradiation behavior of the tested plates was developed using the general purpose commercial finite element analysis package, Abaqus. Using calculated burn-up profiles of irradiated plates to model the power distribution and including irradiation behaviors such as swelling and irradiation enhanced creep, model simulations allow analysis of plate parameters that are either impossible or infeasible in an experimental setting. The development and progression of fabrication induced stress concentrations at the plate edges was of primary interest, as these locations have a unique stress profile during irradiation. Additionally, comparison between 2D and 3D models was performed to optimize analysis methodology. In particular, the ability of 2D and 3D models account for out of plane stresses which result in 3-dimensional creep behavior that is a product of these components. Results show that assumptions made in 2D models for the out-of-plane stresses and strains cannot capture the 3-dimensional physics accurately and thus 2D approximations are not computationally accurate. Stress-strain fields are dependent on plate geometry and irradiation conditions, thus, if stress based criteria is used to predict plate behavior (as opposed to material impurities, fine micro-structural defects, or sharp power gradients), unique 3D finite element formulation for each plate is required.

Samuel J. Miller; Hakan Ozaltun

2012-11-01T23:59:59.000Z

454

CLEANING OF VISCOUS DROPS ON A FLAT INCLINED SURFACE USING GRAVITY-DRIVEN FILM FLOWS  

E-Print Network [OSTI]

the plate surface is critical. Moreover, minimizing the water consumption and the energy of such automatic cleaning devices can have an important environmental and sustainable impact. Dussan (1987) analysed the effect of a shearing immiscible fluid... liquid films on non-porous substrates with topography, J. Fluid Mech. 509, 253–280. Gillham, C. R., Fryer, P. J., Hasting, A. P. M. and Wilson, D. I. (2000) Enhanced cleaning of whey protein soils using pulsed flows, J. Food Eng. 46, 199–209. Hayes, M...

Landel, Julien R.; McEvoy, Harry; Dalziel, Stuart B.

2014-10-07T23:59:59.000Z

455

Plasma-accelerated flyer-plates for equation of state studies  

SciTech Connect (OSTI)

We report on a new technique to accelerate flyer-plates to high velocities ({approx}5 km/s). In this work, a strong shock is created through direct laser ablation of a thin polyimide foil. Subsequent shock breakout of that foil results in the generation of a plasma characterized by a smoothly increasing density gradient and a strong forward momentum. Stagnation of this plasma onto an aluminum foil and the resultant momentum transfer accelerates a thin aluminum flyer-plate. The aluminum flyer-plate is then accelerated to a peak velocity of {approx}5 km/s before impact with a transparent lithium fluoride (LiF) window. Simulations of the stagnating plasma ramp compression and wave reverberations within the flyer-plate suggest that the temperature at the flyer-plate impact surface is elevated by less than 50 Degree-Sign C. Optical velocimetry is used to measure the flyer-plate velocity and impact conditions enabling the shocked refractive index of LiF to be determined. The results presented here are in agreement with conventional flyer-plate measurements validating the use of plasma-accelerated flyer-plates for equation of state and impact studies.

Fratanduono, D. E.; Smith, R. F.; Eggert, J. H.; Braun, D. G.; Collins, G. W. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); Boehly, T. R. [Laboratory for Laser Energetic, University of Rochester, 250 East River Road, Rochester, New York 14623-1299 (United States)

2012-07-15T23:59:59.000Z

456

Plate interaction in the NE Caribbean subduction zone from continuous GPS observations  

E-Print Network [OSTI]

Plate interaction in the NE Caribbean subduction zone from continuous GPS observations Uri S. ten sites on NE Caribbean islands to evaluate strain accumulation along the North American (NA) ­ Caribbean-Venegas (2012), Plate interaction in the NE Caribbean subduction zone from continuous GPS observations, Geophys

ten Brink, Uri S.

457

DESIGN OPTIMIZATION OF HIGH-PERFORMANCE HELIUM-COOLED DIVERTOR PLATE CONCEPT  

E-Print Network [OSTI]

DESIGN OPTIMIZATION OF HIGH-PERFORMANCE HELIUM-COOLED DIVERTOR PLATE CONCEPT X.R. Wanga , S Consulting, Fliederweg 3, 76351 Linkenheim, Germany A helium-cooled plate-type divertor design concept has of the concept in the high heat flux zone. This paper describes the design optimization of the helium

Raffray, A. René

458

Experimental estimations of viscoelastic properties of multilayer damped plates in broad-band frequency range  

E-Print Network [OSTI]

lightweighting structures for aeronautics, automotive or construction applications, the level of performance's modulus) of "polyethylene thermoplastic / aluminum" bilayer plates. The thermoplastic is chosen for its and manufacture Each plate is constituted of a first layer in aluminum (of thickness 2mm), on which a second layer

Paris-Sud XI, Université de

459

Electrically switchable phase-type fractal zone plates and fractal photon sieves  

E-Print Network [OSTI]

@psu.edu (T. J. H.); exwsun@ntu.edu.sg (X. W. S.) Abstract: Electrically switchable phase-type fractal zoneElectrically switchable phase-type fractal zone plates and fractal photon sieves Yan Jun Liu,1 Hai­1323 (2004). 9. H. T. Dai, J. H. Liu, X. C. Sun, and D. J. Yin, "Programmable fractal zone plates (Fra

460

The Effects of pH Variation on Whisker Growth on Tin Plated Copper  

E-Print Network [OSTI]

The Effects of pH Variation on Whisker Growth on Tin Plated Copper Jeffrey Wu Advisors: Uttara Engineering Introduction: Field Failure Caused by Tin Whisker Short 20 YEARS Whiskers Growing Inside://nepp.nasa.gov/whisker/photos/pom/index.htm) Tin is an element commonly desired to plate on electrical components because of it's corrosion

Collins, Gary S.

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


461

Hydroelastic analysis of the floating plate optimized for maximum radiation damping  

E-Print Network [OSTI]

Hydroelastic analysis of the floating plate optimized for maximum radiation damping Christopher J t In previous work, the problem of optimizing the shape of a thin floating plate to maximize radiation damping, incompressible ocean of infinite extent. For simplicity, only rigid heave motions were considered and the damping

Damaren, Christopher J.

462

CORRELATING EVAPORATION HEAT TRANSFER COEFFICIENT OF REFRIGERANT R-134a IN A PLATE HEAT EXCHANGER  

E-Print Network [OSTI]

1 CORRELATING EVAPORATION HEAT TRANSFER COEFFICIENT OF REFRIGERANT R-134a IN A PLATE HEAT EXCHANGER for evaporation heat transfer coefficient of refrigerant R-134a flowing in a plate heat exchanger. Correlation schemes proposed by Yan and Lin (1999b) for modeling the heat transfer coefficient in both a single- phase

Kandlikar, Satish

463

Surface plasmons of a graphene parallel plate waveguide bounded by Kerr-type nonlinear media  

E-Print Network [OSTI]

Surface plasmons of a graphene parallel plate waveguide bounded by Kerr-type nonlinear media H by a graphene parallel plate waveguide (PPWG), surrounded on one or both sides by Kerr-type nonlinear media unchanged, as compared to those of a typical graphene PPWG. Moreover, PL and LL of the SPs are considerably

Leung, Pui-Tak "Peter"

464

A free plate surface and weak oceanic crust produce single-sided subduction on Earth  

E-Print Network [OSTI]

A free plate surface and weak oceanic crust produce single-sided subduction on Earth F. Crameri,1 P features of terrestrial plates: (1) the presence of a free deformable upper surface and (2) the presence of weak hydrated crust atop subducting slabs. We show that assuming a free surface, rather than

Kaus, Boris

465

Free Vibration Analysis of Kirchoff Plates with Damaged Boundaries by the Chebyshev Collocation Method  

E-Print Network [OSTI]

Free Vibration Analysis of Kirchoff Plates with Damaged Boundaries by the Chebyshev Collocation for the free vibration analysis of slender Kirchoff plates with both mixed and damaged boundaries an important role in applications of mechanical, aerospace and civil engineering. Studying the free vibration

Butcher, Eric A.

466

Earth Planets Space, 62, 495502, 2010 Philippine Sea Plate motion since the Eocene estimated from paleomagnetism  

E-Print Network [OSTI]

-Izu-Ogasawara (Bonin)-Mariana (IBM) Arc into the Kyushu-Palau Ridge and the present IBM Arc. The Mariana Trough started in the northern part of the PHS Plate west of the Kyushu-Palau Ridge. The history of PHS Plate motion is not yet

Yamazaki, Toshitsugu

467

Increased Hot-Plate Ignition Probability for Nanoparticle-Laden Diesel Fuel  

E-Print Network [OSTI]

Increased Hot-Plate Ignition Probability for Nanoparticle-Laden Diesel Fuel Himanshu Tyagi, Patrick April 2, 2008 ABSTRACT The present study attempts to improve the ignition properties of diesel fuel, droplet ignition experiments were carried out atop a heated hot plate. Different types of fuel mixtures

Pacheco, Jose Rafael

468

Experimental investigation of response of monolithic and bilayer plates to impulsive loads  

E-Print Network [OSTI]

their blast resistance. We have examined the effectiveness of this approach, focusing on the question) or on the back face of the steel plate would provide a more effective blast mitigating composite of the plate, it may actually enhance the destructive effect of the blast, promoting (rather than mitigating

Nemat-Nasser, Sia

469

Mesoscale Self-Assembly of Hexagonal Plates Using Lateral Capillary Forces: Synthesis Using the "Capillary Bond"  

E-Print Network [OSTI]

Mesoscale Self-Assembly of Hexagonal Plates Using Lateral Capillary Forces: Synthesis Using examines self-assembly in a quasi-two-dimensional, mesoscale system. The system studied here involves and hydrophilic faces on the hexagonal plates led to three outcomes: (i) the extension of the strategies of self-assembly

Prentiss, Mara

470

A METHOD FOR IMAGING CORROSION DAMAGE IN THIN PLATES FROM ELECTROSTATIC DATA  

E-Print Network [OSTI]

A METHOD FOR IMAGING CORROSION DAMAGE IN THIN PLATES FROM ELECTROSTATIC DATA Peter G. Kaup 1 nondestructive evaluation of corrosion in plates is considered. The inpection method uses boundary measurements of currents and voltages to determine the material loss caused by corrosion. The development of the method

Santosa, Fadil

471

FREQUENCY DOMAIN INSTANTANEOUS WAVENUMBER ESTIMATION FOR DAMAGE QUANTIFICATION IN LAYERED PLATE STRUCTURES  

E-Print Network [OSTI]

FREQUENCY DOMAIN INSTANTANEOUS WAVENUMBER ESTIMATION FOR DAMAGE QUANTIFICATION IN LAYERED PLATE, US 3 G. W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA of promising techniques for the identification and the characterization of damage in plate structures. Among

Boyer, Edmond

472

SPERT Destructive Test - I on Aluminum, Highly Enriched Plate Type Core  

ScienceCinema (OSTI)

SPERT - Special Power Excursion Reactor Tests Destructive Test number 1 On Aluminum, Highly Enriched Plate Type Core. A test studying the behavior of the reactor under destructive conditions on a light water moderated pool-type reactor with a plate-type core.

None

2014-05-07T23:59:59.000Z

473

PROPAGATION OF A-WAVE IN A PLANE PLATE EXPERIMENTAL STUDY  

E-Print Network [OSTI]

PROPAGATION OF A-WAVE IN A PLANE PLATE EXPERIMENTAL STUDY LoĂŻc MARTINEZ Jean DUCLOS Alain TINEL ABSTRACT The propagation of the A-wave is investigated theoretically on a plane brass plate completly a wide development over these ten last years. These studies show that an incident plane wave propagating

Paris-Sud XI, Université de

474

Late Cenozoic partitioning of oblique plate convergence in the Zagros fold-and-thrust belt (Iran)  

E-Print Network [OSTI]

Late Cenozoic partitioning of oblique plate convergence in the Zagros fold-and-thrust belt (Iran of oblique plate convergence in the Zagros fold-and-thrust belt (Iran), Tectonics, 25, TC3002, doi:10.1029/2005TC001860. 1. Introduction [2] The Zagros fold-and-thrust belt of southern Iran, the longest

Paris-Sud XI, Université de

475

Peel and Shear Fracture Characterization of Debonding in FRP Plated Concrete Affected by Moisture  

E-Print Network [OSTI]

polymer CFRP plated concrete systems by mechanically testing accelerated moisture conditioned mesoscalePeel and Shear Fracture Characterization of Debonding in FRP Plated Concrete Affected by Moisture fracture toughness as the quantification parameter of the CFRP-epoxy-concrete trilayer system, which

Entekhabi, Dara

476

Light-scattering properties of plate and column ice crystals generated in a laboratory cold chamber  

E-Print Network [OSTI]

with a diode laser beam. This cloud chamber produces distinct plate and hollow column ice crystal types. The cloud chamber developed at the Desert Re- search Institute has been used to produce ice clouds composedLight-scattering properties of plate and column ice crystals generated in a laboratory cold chamber

Liou, K. N.

477

Horizontal subduction and truncation of the Cocos Plate beneath central Mexico  

E-Print Network [OSTI]

Horizontal subduction and truncation of the Cocos Plate beneath central Mexico Xyoli Pe from a trans-Mexico temporary broadband seismic network centered on Mexico City, we report that the subducting Cocos Plate beneath central Mexico is horizontal, and tectonically underplates the base

Clayton, Robert W.

478

Community Surveys: Low Dose Radiation. Fernald, Ohio and Rocky Flats, Colorado  

SciTech Connect (OSTI)

This report is intended to present a basic description of the data from the two community surveys and to document the text of the questions; the methods used for the survey data collection; and a brief overview of the results. Completed surveys were conducted at local communities near the Rocky Flats, Colorado and the Fernald, Ohio sites; no survey was conducted for the Brookhaven, New York site. Fernald. The Fernald sample was randomly selected from 98% of all potential residential telephones in the townships of Ross, Morgan, and Crosby. The only telephone exchanges not used for the Fernald study had 4%, or fewer, of the holders of the telephone numbers actually living in either of the three target townships. Surveying started on July 24, 2001 and finished on August 30, 2001. A total of 399 completed interviews were obtained resulting in a CASRO response rate of 41.8%. The average length of an interview was 16.5 minutes. Rocky Flats. The sample was randomly selected from all potential residential telephones in Arvada and from 99% of the potential telephones in Westminster. Surveying started on August 10, 2001 and finished on September 25, 2001. A total of 401 completed interviews were obtained with a CASRO response rate of 32.5%. The average length of an interview was 15.7 minutes. Overall, respondents hold favorable views of science. They indicate an interest in developments in science and technology, feel that the world is better off because of science, and that science makes our lives healthier, easier, and more comfortable. However, respondents are divided on whether science should decide what is safe or not safe for themselves and their families. The majority of the respondents think that standards for exposure to radiation should be based on what science knows about health effects of radiation and on what is possible with today's technology. Although few respondents had visited the sites, most had heard or read something about Fernald or Rocky Flat s in the media. Impressions of the sites tend to be negative. Most respondents feel that overall their community would be better off without the site. However, when asked about the economic future of their community after cleanup and closure of the site, only 31-43% thought that it will be better, 47-56% thought their local economy will be about the same.

C. K. Mertz; James Flynn; Donald G. MacGregor; Theresa Satterfield; Stephen M. Johnson; Seth Tuler; Thomas Webler

2002-10-16T23:59:59.000Z

479

Simultaneous laser cutting and welding of metal foil to edge of a plate  

DOE Patents [OSTI]

A method of welding an ultra-thin foil to the edge of a thicker sheet to form a vacuum insulation panel comprising the steps of providing an ultra-thin foil having a thickness less than 0.002, providing a top plate having an edge and a bottom plate having an edge, clamping the foil to the edge of the plate wherein the clamps act as heat sinks to distribute heat through the foil, providing a laser, moving the laser relative to the foil and the plate edges to form overlapping weld beads to weld the foil to the plate edges while simultaneously cutting the foil along the weld line formed by the overlapping beads.

Pernicka, John C. (Fort Collins, CO); Benson, David K. (Golden, CO); Tracy, C. Edwin (Golden, CO)

1996-01-01T23:59:59.000Z

480

Simultaneous laser cutting and welding of metal foil to edge of a plate  

DOE Patents [OSTI]

A method is described for welding an ultra-thin foil to the edge of a thicker sheet to form a vacuum insulation panel comprising the steps of providing an ultra-thin foil having a thickness less than 0.002, providing a top plate having an edge and a bottom plate having an edge, clamping the foil to the edge of the plate wherein the clamps act as heat sinks to distribute heat through the foil, providing a laser, moving the laser relative to the foil and the plate edges to form overlapping weld beads to weld the foil to the plate edges while simultaneously cutting the foil along the weld line formed by the overlapping beads. 7 figs.

Pernicka, J.C.; Benson, D.K.; Tracy, C.E.

1996-03-19T23:59:59.000Z

Note: This page contains sample records for the topic "thermosiphon flat plate" 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.


481

Horizontal Plate Plate  

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

Metadata also available as Metadata: IdentificationInformation DataQualityInformation SpatialDataOrganizationInformation SpatialReferenceInformation EntityandAttributeI...

483

Horizontal Plate Plate  

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 ProposedUsingFun withconfinement plasmas inPortalAll NERSC userNewhigh

484

Asymptotically locally AdS and flat black holes in the presence of an electric field in the Horndeski scenario  

E-Print Network [OSTI]

Asymptotically locally AdS and asymptotically flat black hole solutions are found for a particular case of the Horndeski action. The action contains the Einstein-Hilbert term with a cosmological constant, a real scalar field with a non minimal kinetic coupling given by the Einstein tensor, the minimal kinetic coupling and the Maxwell term. There is no scalar potential. The solution has two integration constants related with the mass and the electric charge. The solution is given for all dimensions. A new class of asymptotically locally flat spherically symmetric black holes is found when the minimal kinetic coupling vanishes and the cosmological constant is present. In this case we get a solution which represents an electric Universe. The electric field at infinity is only supported by $\\Lambda$. When the cosmological constant vanishes the black hole is asymptotically flat.

Adolfo Cisterna; Cristián Erices

2014-03-03T23:59:59.000Z

485

Evaluation of safety assessment methodologies in Rocky Flats Risk Assessment Guide (1985) and Building 707 Final Safety Analysis Report (1987)  

SciTech Connect (OSTI)

FSARs. Rockwell International, as operating contractor at the Rocky Flats plant, conducted a safety analysis program during the 1980s. That effort resulted in Final Safety Analysis Reports (FSARs) for several buildings, one of them being the Building 707 Final Safety Analysis Report, June 87 (707FSAR) and a Plant Safety Analysis Report. Rocky Flats Risk Assessment Guide, March 1985 (RFRAG85) documents the methodologies that were used for those FSARs. Resources available for preparation of those Rocky Flats FSARs were very limited. After addressing the more pressing safety issues, some of which are described below, the present contractor (EG&G) intends to conduct a program of upgrading the FSARs. This report presents the results of a review of the methodologies described in RFRAG85 and 707FSAR and contains suggestions that might be incorporated into the methodology for the FSAR upgrade effort.

Walsh, B.; Fisher, C.; Zigler, G.; Clark, R.A. [Science and Engineering Associates, Inc., Albuquerque, NM (United States)

1990-11-09T23:59:59.000Z

486

Integration in the GHP formalism III: Finding all conformally flat radiation metrics as an example of an `optimal situation'  

E-Print Network [OSTI]

Held has proposed an integration procedure within the GHP formalism built around four real, functionally independent, zero-weighted scalars. He suggests that such a procedure would be particularly simple for the `optimal situation', when the formalism directly supplies the full quota of four scalars of this type; a spacetime without any Killing vectors would be such a situation. Wils has recently obtained a metric which he claims is the only conformally flat, pure radiation metric which is not a plane wave; this metric has been shown by Koutras to admit no Killing vectors, in general. Therefore, as a simple illustration of the GHP integration procedure, we obtain systematically the complete class of conformally flat, pure radiation metrics. Our result shows that the conformally flat, pure radiation metrics, which are not plane waves, are a larger class than Wils has obtained.

S. Brian Edgar; Garry Ludwig

1997-01-24T23:59:59.000Z

487

Environmental standards setting for Rocky Flats Plant: The pursuit of zero risk  

SciTech Connect (OSTI)

The Rocky Flats Plant (RFP) is a Department of Energy facility, located near Denver, Colorado, whose primary mission has been the fabrication of nuclear weapons components using plutonium, uranium, beryllium, and stainless steel. Past RFP activities have resulted in contamination of soil, surface water, sediment, and ground water with radioactive and/or hazardous chemical constituents. Although RFP environmental contamination levels generally are low in comparison to other DOE sites, close proximity to the Denver metropolitan area has resulted in proposed and implemented RFP environmental protection standards which are far more stringent than those for comparable facilities in the nation. The RFP experience with State and local involvement in standards setting, which often bypasses the traditional organizations and recommendations for radiation protection, may set precedence for future environmental radiation protection at other nuclear facilities.

Daugherty, N.M.

1992-01-01T23:59:59.000Z

488

Environmental standards setting for Rocky Flats Plant: The pursuit of zero risk  

SciTech Connect (OSTI)

The Rocky Flats Plant (RFP) is a Department of Energy facility, located near Denver, Colorado, whose primary mission has been the fabrication of nuclear weapons components using plutonium, uranium, beryllium, and stainless steel. Past RFP activities have resulted in contamination of soil, surface water, sediment, and ground water with radioactive and/or hazardous chemical constituents. Although RFP environmental contamination levels generally are low in comparison to other DOE sites, close proximity to the Denver metropolitan area has resulted in proposed and implemented RFP environmental protection standards which are far more stringent than those for comparable facilities in the nation. The RFP experience with State and local involvement in standards setting, which often bypasses the traditional organizations and recommendations for radiation protection, may set precedence for future environmental radiation protection at other nuclear facilities.

Daugherty, N.M.

1992-11-01T23:59:59.000Z

489

Correspondence Between $5D$ Ricci-Flat Cosmological Models and Quintessence Dark Energy Models  

E-Print Network [OSTI]

We study the accelerating expansion and the induced dark energy of the $5D$ Ricci-flat universe which is characterized by having a big bounce as opposed to a big bang. We show that the arbitrary function $\\mu(t)$ contained in the $5D$ solutions can be rewritten in terms of the redshift $z$ as a new arbitrary function $f(z)$, and we find that there is a correspondence between this $f(z)$ and the potential $V(\\phi)$ of the 4D quintessence models. Using this correspondence, the arbitrary function $f(z)$ and the $5D$ solution could be specified for a given form of the potential $V(\\phi)$.

Lixin Xu; Hongya Liu; Baorong Chang

2005-12-26T23:59:59.000Z

490

Flow modeling of flat oval ductwork elbows using computational fluid dynamics  

SciTech Connect (OSTI)

Incompressible turbulent flow fields in heating, ventilating, and air-conditioning (HVAC) elbows were computed using an incompressible, three-dimensional computational fluid dynamics (CFD) solver implementing a {kappa}-{epsilon} turbulence model. Two different geometries were investigated, including 90-degree five-gore hard-bend and easy-bend flat oval elbows. The geometries represent a subset of many configurations analyzed in ASHRAE RP-854, Determination of Duct Fitting Resistance by Numerical Analysis. For each configuration, the zero-length pressure loss coefficient was calculated. The flow was described through contours of velocity and plots of static pressure. The Reynolds number for these flows was held constant at 100,000 based on duct diameter and mean fluid velocity.

Mahank, T.A.; Mumma, S.A. [Pennsylvania State Univ., University Park, PA (United States)

1997-12-31T23:59:59.000Z

491

Classical stability of black hole Cauchy horizons in two-dimensional asymptotically flat space-times  

E-Print Network [OSTI]

In this paper we analyse the stability of black hole Cauchy horizons arising in a class of 2d dilaton gravity models. It is shown that due to the characteristic asymptotic Rindler form of the metric of these models, time dependent gravitational perturbations generated in the external region do not necessarily blow-up when propagated along the Cauchy horizon. There exists, in fact, a region of nonzero measure in the space of the parameters characterizing the solutions such that both instability and mass inflation are avoided. This is a new result concerning asymptotically flat space-times, not shared by the well-known solutions of General Relativity. Despite this fact, however, quantum back-reaction seems to produce a scalar curvature singularity there.

A. Fabbri

1996-07-04T23:59:59.000Z

492

Analysis of Generalized Ghost Pilgrim Dark Energy in Non-flat FRW Universe  

E-Print Network [OSTI]

This work is based on pilgrim dark energy conjecture which states that phantom-like dark energy possesses the enough resistive force to preclude the formation of black hole. The non-flat geometry is considered which contains the interacting generalized ghost pilgrim dark energy with cold dark matter. Some well-known cosmological parameters (evolution parameter ($\\omega_{\\Lambda}$) and squared speed of sound) and planes ($\\omega_{\\Lambda}$-$\\omega_{\\Lambda}'$ and statefinder) are constructed in this scenario. The discussion of these parameters is totally done through pilgrim dark energy parameter ($u$) and interacting parameter ($d^2$). It is interesting to mention here that the analysis of evolution parameter supports the conjecture of pilgrim dark energy. Also, this model remains stable against small perturbation in most of the cases of $u$ and $d^2$. Further, the cosmological planes correspond to $\\Lambda$CDM limit as well as different well-known dark energy models.

Abdul Jawad

2014-12-11T23:59:59.000Z

493

PNNI routing support for ad hoc mobile networking: A flat architecture  

SciTech Connect (OSTI)

This contribution extends the Outside Nodal Hierarchy List (ONHL) procedures described in ATM Form Contribution 97-0766. These extensions allow multiple mobile networks to form either an ad hoc network or an extension of a fixed PNNI infrastructure. This contribution covers the simplest case where the top-most Logical Group Nodes (LGNs), in those mobile networks, all reside at the same level in a PNNI hierarchy. Future contributions will cover the general case where those top-most LGNs reside at different hierarchy levels. This contribution considers a flat ad hoc network architecture--in the sense that each mobile network always participates in the PNNI hierarchy at the preconfigured level of its top-most LGN.

Martinez, L.; Sholander, P.; Tolendino, L.

1997-12-01T23:59:59.000Z

494

Calibration of a gated flat field spectrometer as a function of x-ray intensity  

SciTech Connect (OSTI)

We present an experimental determination of the response of a gated flat-field spectrometer at the Shenguang-II laser facility. X-rays were emitted from a target that was heated by laser beams and then were divided into different intensities with a step aluminum filter and collected by a spectrometer. The transmission of the filter was calibrated using the Beijing Synchrotron Radiation Facility. The response characteristics of the spectrometer were determined by comparing the counts recorded by the spectrometer with the relative intensities of the x-rays transmitted through the step aluminum filter. The response characteristics were used to correct the transmission from two shots of an opacity experiment using the same samples. The transmissions from the two shots are consistent with corrections, but discrepant without corrections.

Xiong, Gang; Yang, Guohong; Li, Hang; Zhang, Jiyan, E-mail: zhangjiyanzjy@sina.com; Zhao, Yang; Hu, Zhimin; Wei, Minxi; Qing, Bo; Yang, Jiamin; Liu, Shenye; Jiang, Shaoen [Research Center of Laser Fusion, China Academy of Engineering Physics, P. O. Box 919-986, Mianyang 621900 (China)] [Research Center of Laser Fusion, China Academy of Engineering Physics, P. O. Box 919-986, Mianyang 621900 (China)

2014-04-15T23:59:59.000Z

495

Generalized boundary conditions for general relativity for the asymptotically flat case in terms of Ashtekar's variables  

E-Print Network [OSTI]

There is a gap that has been left open since the formulation of general relativity in terms of Ashtekar's new variables namely the treatment of asymptotically flat field configurations that are general enough to be able to define the generators of the Lorentz subgroup of the asymptotical Poincar\\'e group. While such a formulation already exists for the old geometrodynamical variables, up to now only the generators of the translation subgroup could be defined because the function spaces of the fields considered earlier are taken too special. The transcription of the framework from the ADM variables to Ashtekar's variables turns out not to be straightforward due to the freedom to choose the internal SO(3) frame at spatial infinity and due to the fact that the non-trivial reality conditions of the Ashtekar framework reenter the game when imposing suitable boundary conditions on the fields and the Lagrange multipliers.

T. Thiemann

1993-10-29T23:59:59.000Z

496

Generalized boundary conditions for general relativity for the asymptotically flat case in terms of Ashtekar's variables  

E-Print Network [OSTI]

There is a gap that has been left open since the formulation of general relativity in terms of Ashtekar's new variables namely the treatment of asymptotically flat field configurations that are general enough to be able to define the generators of the Lorentz subgroup of the asymptotical Poincar\\'e group. While such a formulation already exists for the old geometrodynamical variables, up to now only the generators of the translation subgroup could be defined because the function spaces of the fields considered earlier are taken too special. The transcription of the framework from the ADM variables to Ashtekar's variables turns out not to be straightforward due to the a priori freedom to choose the internal SO(3) frame at spatial infinity and due to the fact that the non-trivial reality conditions of the Ashtekar framework reenter the stage when imposing suitable boundary conditions on the fields and the Lagrange multipliers.

T. Thiemann

1999-10-04T23:59:59.000Z

497

Method of forming a spacer for field emission flat panel displays  

DOE Patents [OSTI]

Spacers are disclosed for applications such as field emission flat panel displays and vacuum microelectronics, and which involves the application of aerogel/xerogel technology to the formation of the spacer. In a preferred approach the method uses a mold and mold release agent wherein the gel precursor is a liquid which can be applied to the mold filling holes which expose the substrate (either the baseplate or the faceplate). A release agent is applied to the mold prior to precursor application to ease removal of the mold after formation of the dielectric spacer. The shrinkage of the gel during solvent extraction also improves mold removal. The final spacer material is a good dielectric, such as silica, secured to the substrate. 3 figs.

Bernhardt, A.F.; Contolini, R.J.

1997-08-19T23:59:59.000Z

498

Method of forming a spacer for field emission flat panel displays  

DOE Patents [OSTI]

Spacers for applications such as field emission flat panel displays and vacuum microelectronics, and which involves the application of aerogel/xerogel technology to the formation of the spacer. In a preferred approach the method uses a mold and mold release agent wherein the gel precursor is a liquid which can be applied to the mold filling holes which expose the substrate (either the baseplate or the faceplate). A release agent is applied to the mold prior to precursor application to ease removal of the mold after formation of the dielectric spacer. The shrinkage of the gel during solvent extraction also improves mold removal. The final spacer material is a good dielectric, such as silica, secured to the substrate.

Bernhardt, Anthony F. (Berkeley, CA); Contolini, Robert J. (Pleasanton, CA)

1997-01-01T23:59:59.000Z

499

A Hydrostratigraphic Framework Model and Alternatives for the Groundwater Flow and Contaminant Transport Model of Corrective Action Unit 98: Frenchman Flat, Clark, Lincoln and Nye Counties, Nevada  

SciTech Connect (OSTI)

A new, revised three-dimensional (3-D) hydrostratigraphic framework model for Frenchman Flat was completed in 2004. The area of interest includes Frenchman Flat, a former nuclear testing area at the Nevada Test Site, and proximal areas. Internal and external reviews of an earlier (Phase I) Frenchman Flat model recommended additional data collection to address uncertainties. Subsequently, additional data were collected for this Phase II initiative, including five new drill holes and a 3-D seismic survey.

Bechtel Nevada

2005-09-01T23:59:59.000Z

500

Unclassified Source Term and Radionuclide Data for Corrective Action Unit 98: Frenchman Flat Nevada Test Site, Nevada, Rev. No.: 0  

SciTech Connect (OSTI)

Frenchman Flat is one of several areas of the Nevada Test Site (NTS) used for underground nuclear testing (Figure 1-1). These nuclear tests resulted in groundwater contamination in the vicinity of the underground test areas. As a result, the U.S. Department of Energy (DOE), National Nuclear Security Administration Nevada Site Office (NNSA/NSO) is currently conducting a corrective action investigation (CAI) of the Frenchman Flat underground test areas. Since 1996, the Nevada Division of Environmental Protection (NDEP) has regulated NNSA/NSO corrective actions through the ''Federal Facility Agreement and Consent Order'' ([FFACO], 1996). Appendix VI of the FFACO agreement, ''Corrective Action Strategy'', was revised on December 7, 2000, and describes the processes that will be used to complete corrective actions, including those in the Underground Test Area (UGTA) Project. The individual locations covered by the agreement are known as corrective action sites (CASs), which are grouped into corrective action units (CAUs). The UGTA CASs are grouped geographically into five CAUs: Frenchman Flat, Central Pahute Mesa, Western Pahute Mesa, Yucca Flat/Climax Mine, and Rainier Mesa/Shoshone Mountain (Figure 1-1). These CAUs have distinctly different contaminant source, geologic, and hydrogeologic characteristics related to their location (FFACO, 1996). The Frenchman Flat CAU consists of 10 CASs located in the northern part of Area 5 and the southern part of Area 11 (Figure 1-1). This report documents the evaluation of the information and data available on the unclassified source term and radionuclide contamination for Frenchman Flat, CAU 98. The methodology used to estimate hydrologic source terms (HSTs) for the Frenchman Flat CAU is also documented. The HST of an underground nuclear test is the portion of the total inventory of radionuclides that is released over time into the groundwater following the test. The total residual inventory of radionuclides associated with one or more tests is known as the radiologic source term (RST). The RST is comprised of radionuclides in water, glass, or other phases or mineralogic forms. This evaluation was conducted in support of the development of a CAU contaminant transport model for the Frenchman Flat CAU.

Farnham, Irene

2005-09-01T23:59:59.000Z