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Note: This page contains sample records for the topic "band axis orientation" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
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1

Precise Gouging-free Tool Orientations for 5-Axis CNC Machining Yong-Joon Kima  

E-Print Network (OSTI)

Precise Gouging-free Tool Orientations for 5-Axis CNC Machining Yong-Joon Kima , Gershon Elbera-free tool paths for 5-axis CNC machining of freeform NURBS surfaces using flat-end and rounded-end (bull modeling and have been widely used in a variety of applications. Consequently, CNC machining of NURBS

Pottmann, Helmut

2

Inverse kinematics for optimal tool orientation control in 5-axis CNC machining  

Science Journals Connector (OSTI)

Abstract The problem of determining the inputs to the rotary axes of a 5-axis CNC machine is addressed, such that relative variations of orientation between the tool axis and surface normal are minimized subject to the constraint of maintaining a constant cutting speed with a ball-end tool. In the context of an orientable-spindle machine, the results of a prior study are directly applicable to the solution of this inverse-kinematics problem. However, since they are expressed in terms of the integral of the geodesic curvature, a discrete time-step solution is proposed that yields accurate rotary-axis increments at high sampling frequencies. For an orientable-table machine, a closed-form solution that specifies the rotary-axis positions as functions of the surface normal variation along the toolpath is possible. In this context, however, the feasibility of a solution is dependent upon the surface normal along the toolpath satisfying certain orientational constraints. These inverse-kinematics solutions facilitate accurate and efficient 5-axis machining of free-form surfaces without “unnecessary” actuation of the machine rotary axes.

Rida T. Farouki; Chang Yong Han; Shiqiao Li

2014-01-01T23:59:59.000Z

3

Dielectric and ferroelectric properties of c-axis oriented strontium bismuth tantalate thin films applied transverse electric fields  

E-Print Network (OSTI)

Dielectric and ferroelectric properties of c-axis oriented strontium bismuth tantalate thin films and ferroelectric properties of c-axis oriented epitaxial strontium bismuth tantalate SBT thin films were American Institute of Physics. DOI: 10.1063/1.2205351 I. INTRODUCTION Strontium bismuth tantalate SBT has

Tonouchi, Masayoshi

4

Tracking formulas and strategies for a receiver oriented dual-axis tracking toroidal heliostat  

SciTech Connect

A 4 m x 4 m toroidal heliostat with receiver oriented dual-axis tracking, also called spinning-elevation tracking, was developed as an auxiliary heat source for a hydrogen production system. A series of spinning-elevation tracking formulas have been derived for this heliostat. This included basic tracking formulas, a formula for the elevation angle for heliostat with a mirror-pivot offset, and a more general formula for the biased elevation angle. This paper presents the new tracking formulas in detail and analyzes the accuracy of applying a simplifying approximation. The numerical results show these receiver oriented dual-axis tracking formula approximations are accurate to within 2.5 x 10{sup -6} m in image plane. Some practical tracking strategies are discussed briefly. Solar images from the toroidal heliostat at selected times are also presented. (author)

Guo, Minghuan; Wang, Zhifeng; Liang, Wenfeng; Zhang, Xiliang; Zang, Chuncheng [Key Laboratory of Solar Thermal Energy and Photovoltaic System of Chinese Academy of Sciences, Institute of Electrical Engineering, Beijing 100190 (China); Lu, Zhenwu; Wei, Xiudong [Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences (CAS), Jilin 130033 (China)

2010-06-15T23:59:59.000Z

5

Thermodynamic study of c-axis-oriented epitaxial Pb(Zr,Ti)O3 thin films  

Science Journals Connector (OSTI)

Thermodynamic characteristics of single crystalline Pb(Zr0.52Ti0.48)O3 (PZT) were investigated using c-axis oriented PZT films. The PZT films were epitaxially grown on Pt/MgO substrate and dielectric and ferroelectric properties were measured as a function of one-dimensional stress. The stress dependence of dielectric and ferroelectric properties was examined on the basis of the Landau-Devonshire’s phenomenological theory and the free energy coefficients of single crystalline PZT films were obtained. The dielectric stiffness coefficients and electrostrictive coefficient of epitaxial PZT films were obtained to be ?1=-1.30×108 (m/F), ?11=3.07×108 (m5/C2F), ?111=-3.11×107 (m9/C2F), and Q12=-5.70×10-2 (m4/C2), which are different from the values derived from the analysis of polycrystalline PZT. The temperature dependence of dielectric constant of the PZT films showed clear Curie-Weiss law and the dielectric stiffness coefficient ?1 derived from this measurement was almost same value from the analysis of stress dependence of the dielectricity of the epitaxial PZT films.

Isaku Kanno; Yu Yokoyama; Hidetoshi Kotera; Kiyotaka Wasa

2004-02-12T23:59:59.000Z

6

Composition dependent valence band order in c-oriented wurtzite AlGaN layers  

SciTech Connect

The valence band order of polar wurtzite aluminum gallium nitride (AlGaN) layers is analyzed for a dense series of samples, grown heteroepitaxially on sapphire substrates, covering the complete composition range. The excitonic transition energies, found by temperature dependent photoluminescence (PL) spectroscopy, were corrected to the unstrained state using input from X-ray diffraction. k?p theory yields a critical relative aluminum concentration x{sub c}=(0.09±0.05) for the crossing of the uppermost two valence bands for strain free material, shifting to higher values for compressively strained samples, as supported by polarization dependent PL. The analysis of the strain dependent valence band crossing reconciles the findings of other research groups, where sample strain was neglected. We found a bowing for the energy band gap to the valence band with ?{sub 9} symmetry of b{sub ?{sub 9}}=0.85eV, and propose a possible bowing for the crystal field energy of b{sub cf}=?0.12eV. A comparison of the light extraction efficiency perpendicular and parallel to the c axis of Al{sub x}Ga{sub 1-x}N/Al{sub y}Ga{sub 1-y}N quantum well structures is discussed for different compositions.

Neuschl, B., E-mail: benjamin.neuschl@uni-ulm.de; Helbing, J.; Knab, M.; Lauer, H.; Madel, M.; Thonke, K. [Institute of Quantum Matter / Semiconductor Physics Group, University of Ulm, Albert-Einstein-Allee 45, 89069 Ulm (Germany); Meisch, T.; Forghani, K.; Scholz, F. [Institute of Optoelectronics, University of Ulm, Albert-Einstein-Allee 45, 89069 Ulm (Germany); Feneberg, M. [Institut für Experimentelle Physik, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106 Magdeburg (Germany)

2014-09-21T23:59:59.000Z

7

Influence of c-axis orientation and scandium concentration on infrared active modes of magnetron sputtered Sc{sub x}Al{sub 1?x}N thin films  

SciTech Connect

Doping of wurtzite aluminium nitride (AlN) with scandium (Sc) significantly enhances the piezoelectric properties of AlN. Sc{sub x}Al{sub 1?x}N thin films with different Sc concentrations (x = 0 to 0.15) were deposited by DC reactive magnetron sputtering. Infrared (IR) absorbance spectroscopy was applied to investigate the Sc concentration dependent shift of the IR active modes E{sub 1}(TO) and A{sub 1}(TO). These results are compared to ab initio simulations, being in excellent agreement with the experimental findings. In addition, IR spectroscopy is established as an economical and fast method to distinguish between thin films with a high degree of c-axis orientation and those exhibiting mixed orientations.

Mayrhofer, P. M.; Bittner, A.; Schmid, U. [Institute of Sensor and Actuator Systems, Vienna University of Technology, Floragasse 7, 1040 Vienna (Austria)] [Institute of Sensor and Actuator Systems, Vienna University of Technology, Floragasse 7, 1040 Vienna (Austria); Eisenmenger-Sittner, C. [Institute of Solid State Physics, Vienna University of Technology, Wiedner Hauptstrasse 8, 1040 Vienna (Austria)] [Institute of Solid State Physics, Vienna University of Technology, Wiedner Hauptstrasse 8, 1040 Vienna (Austria); Euchner, H. [Institute of Materials Science and Technology, Vienna University of Technology, Karlsplatz 13, 1040 Vienna (Austria)] [Institute of Materials Science and Technology, Vienna University of Technology, Karlsplatz 13, 1040 Vienna (Austria)

2013-12-16T23:59:59.000Z

8

Behavior patterns of axis deer (Axis axis) in Texas  

E-Print Network (OSTI)

BEHAVIOR PATTERNS OF AXIS DEER (AXIS AXIS) IN TEXAS A Thesis by Eugene Robert Fuchs Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree MASTER OF SCIENCE August 1976 Major... Subject: Wildlife and Fisheries Sciences BEHAVIOR PATTERNS OF AXIS DEER (AXIS AXIS) IN TEXAS A Thesis by Eugene Robert Fuchs Approved as to style and content by: (Chairman of Comm ttee) Head of Department) Member ) ( ember August 1976 ABSTRACT...

Fuchs, Eugene Robert

2012-06-07T23:59:59.000Z

9

Dielectric properties of c-axis oriented Zn{sub 1-x}Mg{sub x}O thin films grown by multimagnetron sputtering  

SciTech Connect

Zn{sub 1-x}Mg{sub x}O (x=0.3) thin films have been fabricated on Pt/TiO{sub 2}/SiO{sub 2}/Si substrates using multimagnetron sputtering technique. The films with wurtzite structure showed a (002) preferred orientation. Ferroelectricity in Zn{sub 1-x}Mg{sub x}O films was established from the temperature dependent dielectric constant and the polarization hysteresis loop. The temperature dependent study of dielectric constant at different frequencies exhibited a dielectric anomaly at 110 deg. C. The resistivity versus temperature characteristics showed an anomalous increase in the vicinity of the dielectric transition temperature. The Zn{sub 1-x}Mg{sub x}O thin films exhibit well-defined polarization hysteresis loop, with a remanent polarization of 0.2 {mu}C/cm{sup 2} and coercive field of 8 kV/cm at room temperature.

Dhananjay,; Krupanidhi, S. B. [Department of Instrumentation, Indian Institute of Science, Bangalore 560012 (India); Materials Research Center, Indian Institute of Science, Bangalore 560012 (India)

2006-08-21T23:59:59.000Z

10

Vertical axis wind turbine  

SciTech Connect

Wind turbines are largely divided into vertical axis wind turbines and propeller (Horizontal axis) wind turbines. The present invention discloses a vertical axis high speed wind turbine provided with a starting and braking control system. This vertical axis wind turbine is formed by having blades of a proper airfoil fitted to respective supporting arms provided radially from a vertical rotary axis by keeping the blade span-wise direction in parallel with the axis and being provided with a low speed control windmill in which the radial position of each operating piece varies with a centrifugal force produced by the rotation of the vertical rotary axis.

Kato, Y.; Seki, K.; Shimizu, Y.

1981-01-27T23:59:59.000Z

11

Vertical axis wind turbine  

SciTech Connect

Wind turbines are largely divided into vertical axis wind turbines and propeller (Horizontal axis) wind turbines. The present invention discloses a vertical axis high speed wind turbine provided with rotational speed control systems. This vertical axis wind turbine is formed by having blades of a proper airfoil fitted to respective supporting arms provided radially from a vertical rotating shaft by keeping the blade span-wise direction in parallel with the shaft and being provided with aerodynamic control elements operating manually or automatically to control the rotational speed of the turbine.

Kato, Y.; Seki, K.; Shimizu, Y.

1981-01-27T23:59:59.000Z

12

Infrared experimental proof of the orientation of CH4 adsorbed in NaA zeolite by means of the degeneracy splitting of the 03BD3 band,  

E-Print Network (OSTI)

L-255 Infrared experimental proof of the orientation of CH4 adsorbed in NaA zeolite by means (C3v) en face d'un cation Na+. Abstract 2014 The infrared spectrum ofmethane adsorbed in NaA zeolite lattice and connected by windows of 4 A diameter [1]. The methane molecule adsorbed in these cavities

Paris-Sud XI, Université de

13

Food habits of axis deer (Axis axis) on the Coastal Plain, Calhoun County, Texas  

E-Print Network (OSTI)

FOOD HABITS OF AXIS DEER (Axis axis) ON THE COASTAL PLAIN, CALHOUN COUNTY, TEXAS A Thesis by JOHN CLARENCE SMITH Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE December 197l Major Subject: Wildlife Science FOOD HABITS OF AXIS DEER (Axi. s axis) ON THE COASTAL PLAIN, CALHOUN COUNTY, TEXAS A Thesis by JOHN CLARENCE SMITH Approved as to style and content by: (Chairman of Committee) ! (Head...

Smith, John Clarence

2012-06-07T23:59:59.000Z

14

Banded electromagnetic stator core  

DOE Patents (OSTI)

A stator core for an electromagnetic pump includes a plurality of circumferentially adjoining groups of flat laminations disposed about a common centerline axis and collectively defining a central bore and a discontinuous outer perimeter, with adjacent groups diverging radially outwardly to form V-shaped gaps. An annular band surrounds the groups and is predeterminedly tensioned to clamp together the laminations, and has a predetermined flexibility in a radial direction to form substantially straight bridge sections between the adjacent groups.

Fanning, Alan W. (San Jose, CA); Gonzales, Aaron A. (San Jose, CA); Patel, Mahadeo R. (San Jose, CA); Olich, Eugene E. (Aptos, CA)

1996-01-01T23:59:59.000Z

15

Banded electromagnetic stator core  

DOE Patents (OSTI)

A stator core for an electromagnetic pump includes a plurality of circumferentially adjoining groups of flat laminations disposed about a common centerline axis and collectively defining a central bore and a discontinuous outer perimeter, with adjacent groups diverging radially outwardly to form V-shaped gaps. An annular band surrounds the groups and is predeterminedly tensioned to clamp together the laminations, and has a predetermined flexibility in a radial direction to form substantially straight bridge sections between the adjacent groups.

Fanning, Alan W. (San Jose, CA); Gonzales, Aaron A. (San Jose, CA); Patel, Mahadeo R. (San Jose, CA); Olich, Eugene E. (Aptos, CA)

1994-01-01T23:59:59.000Z

16

Banded electromagnetic stator core  

DOE Patents (OSTI)

A stator core for an electromagnetic pump includes a plurality of circumferentially adjoining groups of flat laminations disposed about a common centerline axis and collectively defining a central bore and a discontinuous outer perimeter, with adjacent groups diverging radially outwardly to form V-shaped gaps. An annular band surrounds the groups and is predeterminedly tensioned to clamp together the laminations, and has a predetermined flexibility in a radial direction to form substantially straight bridge sections between the adjacent groups. 5 figs.

Fanning, A.W.; Gonzales, A.A.; Patel, M.R.; Olich, E.E.

1996-06-11T23:59:59.000Z

17

Banded electromagnetic stator core  

DOE Patents (OSTI)

A stator core for an electromagnetic pump includes a plurality of circumferentially adjoining groups of flat laminations disposed about a common centerline axis and collectively defining a central bore and a discontinuous outer perimeter, with adjacent groups diverging radially outwardly to form V-shaped gaps. An annular band surrounds the groups and is predeterminedly tensioned to clamp together the laminations, and has a predetermined flexibility in a radial direction to form substantially straight bridge sections between the adjacent groups. 5 figures.

Fanning, A.W.; Gonzales, A.A.; Patel, M.R.; Olich, E.E.

1994-04-05T23:59:59.000Z

18

Vertical axis wind turbines  

DOE Patents (OSTI)

A vertical axis wind turbine is described. The wind turbine can include a top ring, a middle ring and a lower ring, wherein a plurality of vertical airfoils are disposed between the rings. For example, three vertical airfoils can be attached between the upper ring and the middle ring. In addition, three more vertical airfoils can be attached between the lower ring and the middle ring. When wind contacts the vertically arranged airfoils the rings begin to spin. By connecting the rings to a center pole which spins an alternator, electricity can be generated from wind.

Krivcov, Vladimir (Miass, RU); Krivospitski, Vladimir (Miass, RU); Maksimov, Vasili (Miass, RU); Halstead, Richard (Rohnert Park, CA); Grahov, Jurij (Miass, RU)

2011-03-08T23:59:59.000Z

19

A process planning strategy for multi-axis hybrid manufacturing process  

Science Journals Connector (OSTI)

This paper outlines a process planning strategy for a multi-axis hybrid manufacturing process that includes a metal deposition system and a multi-axis CNC machining system to rapidly manufacture precision metal parts. Different from the current layered manufacturing processes of which build direction is fixed throughout the process, the orientation of the part can affect the non-support buildability in the multi-axis hybrid manufacturing process. However, each orientation that satisfies the buildability and other constraints may not be unique. In this case, the final optimal orientation is determined based on build time. The build time computation algorithm for multi-axis hybrid system is presented in this paper. To speed up the exhaustive search for the optimal orientation, a multi-stage algorithm is developed to reduce the search space. A case study is used as an example to show the process planning strategy.

Jun Zhang; Jianzhong Ruan; Frank Liou

2013-01-01T23:59:59.000Z

20

MHK Technologies/Vertical Axis Venturi System | Open Energy Information  

Open Energy Info (EERE)

Axis Venturi System Axis Venturi System < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage 275px Technology Profile Primary Organization Warrior Girl Corporation Technology Resource Click here Current Technology Type Click here Axial Flow Turbine Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description The proprietary venturi system uses two venturies one on the upstream side of the vertical axis turbine to force the water flow into the turbine and one at the downstream side of the turbine which creates a lower pressure region that pulls the water through the turbine The vertical axis orientation of the turbine is believed by the company to allow for efficiency gains

Note: This page contains sample records for the topic "band axis orientation" 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

Orientation test  

Science Journals Connector (OSTI)

... may require the preferable orientation of collagen fibres in a fixed direction. Osaki, S. Tappi 70, 105–108 (1987).

SHIGEYOSHI OSAKI

1990-09-13T23:59:59.000Z

22

Vertical axis wind turbine acoustics  

E-Print Network (OSTI)

Vertical Axis Wind Turbine Acoustics Charlie Pearson Corpus Christi College Cambridge University Engineering Department A thesis submitted for the degree of Doctor of Philosophy September 2013 Declaration Described in this dissertation is work... quickly to changing wind conditions, small- scale vertical axis wind turbines (VAWTs) have been proposed as an efficient solution for deployment in built up areas, where the wind is more gusty in nature. If VAWTs are erected in built up areas...

Pearson, Charlie

2014-04-08T23:59:59.000Z

23

Bird Banding  

NLE Websites -- All DOE Office Websites (Extended Search)

Bird Banding Bird Banding Name: Matthew Location: N/A Country: N/A Date: N/A Question: I am researching why the US fish and wildlife agency bands ducks and what information is used to set hunting daily and possession limits. Replies: Matt, The USFW service has been doing this for decades to have statistical data on the population fluctuations of all birds. This information serves to warn when over hunting has taken a toll on a species or if a species is declining due to habitat loss or whatever. This information also indicates need for increased habitat areas as well as possible hunting restrictions. This organization has a formula for setting hunting limits based upon the data received from banding. It is important that all hunters return these bands for they are the ones who will suffer if the information is not there. Females of any species are the most important for reproduction and often they are protected over the males. This should explain the differences in what can be bagged.

24

Two-axis angular effector  

DOE Patents (OSTI)

A new class of coplanar two-axis angular effectors. These effectors combine a two-axis rotational joint analogous to a Cardan joint with linear actuators in a manner to produce a wider range of rotational motion about both axes defined by the joint. This new class of effectors also allows design of robotic manipulators having very high strength and efficiency. These effectors are particularly suited for remote operation in unknown surroundings, because of their extraordinary versatility. An immediate application is to the problems which arise in nuclear waste remediation.

Vaughn, Mark R. (Albuquerque, NM); Robinett, III, Rush D. (Tijeras, NM); Phelan, John R. (Albuquerque, NM); Van Zuiden, Don M. (Albuquerque, NM)

1997-01-21T23:59:59.000Z

25

A six-axis robotic sample changer for high-throughput neutron powder diffraction and texture measurements  

Science Journals Connector (OSTI)

A new six-axis robotic sample changer for neutron powder diffraction experiments, including texture measurements, has enabled a novel set of experiments to be performed at the High-Pressure Preferred Orientation diffractometer at the Lujan Neutron Scattering Center.

Losko, A.S.

2014-11-18T23:59:59.000Z

26

Structural and band alignment properties of Al{sub 2}O{sub 3} on epitaxial Ge grown on (100), (110), and (111)A GaAs substrates by molecular beam epitaxy  

SciTech Connect

Structural and band alignment properties of atomic layer Al{sub 2}O{sub 3} oxide film deposited on crystallographically oriented epitaxial Ge grown in-situ on (100), (110), and (111)A GaAs substrates using two separate molecular beam epitaxy chambers were investigated using cross-sectional transmission microscopy (TEM) and x-ray photoelectron spectroscopy (XPS). High-resolution triple axis x-ray measurement demonstrated pseudomorphic and high-quality Ge epitaxial layer on crystallographically oriented GaAs substrates. The cross-sectional TEM exhibited a sharp interface between the Ge epilayer and each orientation of the GaAs substrate as well as the Al{sub 2}O{sub 3} film and the Ge epilayer. The extracted valence band offset, {Delta}E{sub v}, values of Al{sub 2}O{sub 3} relative to (100), (110), and (111) Ge orientations using XPS measurement were 3.17 eV, 3.34 eV, and 3.10 eV, respectively. Using XPS data, variations in {Delta}E{sub v} related to the crystallographic orientation were {Delta}E{sub V}(110)Ge>{Delta}E{sub V}(100)Ge{>=}{Delta}E{sub V}(111)Ge and the conduction band offset, {Delta}E{sub c}, related to the crystallographic orientation was {Delta}E{sub c}(111)Ge>{Delta}E{sub c}(110)Ge>{Delta}E{sub c}(100)Ge using the measured {Delta}E{sub v}, bandgap of Al{sub 2}O{sub 3} in each orientation, and well-known Ge bandgap of 0.67 eV. These band offset parameters are important for future application of Ge-based p- and n-channel metal-oxide field-effect transistor design.

Hudait, M. K.; Zhu, Y. [Advanced Devices and Sustainable Energy Laboratory (ADSEL), Bradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, Virginia 24061 (United States); Maurya, D.; Priya, S. [Center for Energy Harvesting Materials and Systems (CEHMS), Virginia Tech, Blacksburg, Virginia 24061 (United States); Patra, P. K. [Department of Biomedical Engineering and Department of Mechanical Engineering, University of Bridgeport, Bridgeport, Connecticut 06604 (United States); Ma, A. W. K. [Department of Chemical and Biomolecular Engineering and Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269 (United States); Aphale, A.; Macwan, I. [Department of Electrical and Computer Engineering, University of Bridgeport, Bridgeport, Connecticut 06604 (United States)

2013-04-07T23:59:59.000Z

27

Design of a Thermal Imaging Diagnostic Using 90-Degree, Off-Axis, Parabolic Mirrors  

SciTech Connect

Thermal imaging is an important, though challenging, diagnostic for shockwave experiments. Shock-compressed materials undergo transient temperature changes that cannot be recorded with standard (greater than ms response time) infrared detectors. A further complication arises when optical elements near the experiment are destroyed. We have designed a thermal-imaging system for studying shock temperatures produced inside a gas gun at Sandia National Laboratories. Inexpensive, diamond-turned, parabolic mirrors relay an image of the shocked target to the exterior of the gas gun chamber through a sapphire vacuum port. The 3000–5000-nm portion of this image is directed to an infrared camera which acquires a snapshot of the target with a minimum exposure time of 150 ns. A special mask is inserted at the last intermediate image plane, to provide dynamic thermal background recording during the event. Other wavelength bands of this image are split into high-speed detectors operating at 900–1700 nm, and at 1700–3000 nm for timeresolved pyrometry measurements. This system incorporates 90-degree, off-axis parabolic mirrors, which can collect low f/# light over a broad spectral range, for high-speed imaging. Matched mirror pairs must be used so that aberrations cancel. To eliminate image plane tilt, proper tip-to-tip orientation of the parabolic mirrors is required. If one parabolic mirror is rotated 180 degrees about the optical axis connecting the pair of parabolic mirrors, the resulting image is tilted by 60 degrees. Different focal-length mirrors cannot be used to magnify the image without substantially sacrificing image quality. This paper analyzes performance and aberrations of this imaging diagnostic.

Malone, Robert M.; Becker, Steven A.; Dolan, Daniel H.; Hacking, Richard G.; Hickman, Randy J.; Kaufman, Morris I.; Stevens, Gerald D.; Turley, William D.

2006-09-01T23:59:59.000Z

28

AXI LLC | Open Energy Information  

Open Energy Info (EERE)

Page Page Edit with form History Facebook icon Twitter icon » AXI LLC Jump to: navigation, search Name AXI LLC Place Quincy, Massachusetts Zip 02169 Sector Biofuels Product Aims to make commercially feasible strains of algae for fuel production Coordinates 42.2363996°, -71.0200613° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":42.2363996,"lon":-71.0200613,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

29

Systematic Study of Electronic Phases, Band Gaps and Band Overlaps of Bismuth Antimony Nanowires  

E-Print Network (OSTI)

We have developed an iterative one dimensional model to study the narrow band-gap and the associated non-parabolic dispersion relations for bismuth antimony nanowires. An analytical approximation has also been developed. Based on the general model, we have developed, we have calculated and analyzed the electronic phase diagrams and the band-gap/band-overlap map for bismuth antimony nanowires, as a function of stoichiometry, growth orientation, and wire width.

Shuang Tang; Mildred Dresselhaus

2013-12-03T23:59:59.000Z

30

Dual Axis Radiographic Hydrodynamic Test Facility | National...  

National Nuclear Security Administration (NNSA)

Dual Axis Radiographic Hydrodynamic Test Facility | National Nuclear Security Administration People Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear...

31

Flexible helical-axis stellarator  

DOE Patents (OSTI)

An 1=1 helical winding which spirals about a conventional planar, circular central conductor of a helical-axis stellarator adds a significant degree of flexibility by making it possible to control the rotational transform profile and shear of the magnetic fields confining the plasma in a helical-axis stellarator. The toroidal central conductor links a plurality of toroidal field coils which are separately disposed to follow a helical path around the central conductor in phase with the helical path of the 1=1 winding. This coil configuration produces bean-shaped magnetic flux surfaces which rotate around the central circular conductor in the same manner as the toroidal field generating coils. The additional 1=1 winding provides flexible control of the magnetic field generated by the central conductor to prevent the formation of low-order resonances in the rotational transform profile which can produce break-up of the equilibrium magnetic surfaces. Further, this additional winding can deepen the magnetic well which together with the flexible control provides increased stability.

Harris, Jeffrey H. (Oak Ridge, TN); Hender, Timothy C. (Abingdon, GB2); Carreras, Benjamin A. (Oak Ridge, TN); Cantrell, Jack L. (Oak Ridge, TN); Morris, Robert N. (Oak Ridge, TN)

1988-01-01T23:59:59.000Z

32

Experimental study of shear and compaction band formation in berea sandstone  

E-Print Network (OSTI)

changes in the AE rate, and are consistent with the formation of compacting shear bands at higher mean stress. Predictions of changes in band orientation with mean stress are largely consistent with observed trends, but deviate from the observed...

Herrin, Elizabeth Anne

2009-05-15T23:59:59.000Z

33

Helical axis stellarator with noninterlocking planar coils  

DOE Patents (OSTI)

A helical axis stellarator using only noninterlocking planar, non-circular coils, generates magnetic fields having a magnetic well and large rotational transform with resultant large equilibrium beta.

Reiman, Allan (Princeton, NJ); Boozer, Allen H. (Rocky Hill, NJ)

1987-01-01T23:59:59.000Z

34

British wind band music.  

E-Print Network (OSTI)

??I have chosen to be assessed as an interpreter and conductor of British wind band music from the earliest writings for wind band up to,… (more)

Jones, GO

2005-01-01T23:59:59.000Z

35

Perfect preferential orientation of nitrogen-vacancy defects in a synthetic diamond sample  

SciTech Connect

We show that the orientation of nitrogen-vacancy (NV) defects in diamond can be efficiently controlled through chemical vapor deposition growth on a (111)-oriented diamond substrate. More precisely, we demonstrate that spontaneously generated NV defects are oriented with a ?97% probability along the [111] axis, corresponding to the most appealing orientation among the four possible crystallographic axes. Such a nearly perfect preferential orientation is explained by analyzing the diamond growth mechanism on a (111)-oriented substrate and could be extended to other types of defects. This work is a significant step towards the design of optimized diamond samples for quantum information and sensing applications.

Lesik, M.; Roch, J.-F. [Laboratoire Aimé Cotton, CNRS, Université Paris-Sud and Ecole Normale Supérieure de Cachan, 91405 Orsay (France); Tetienne, J.-P.; Jacques, V., E-mail: vjacques@ens-cachan.fr [Laboratoire Aimé Cotton, CNRS, Université Paris-Sud and Ecole Normale Supérieure de Cachan, 91405 Orsay (France); Laboratoire de Photonique Quantique et Moléculaire, Ecole Normale Supérieure de Cachan and CNRS UMR 8537, 94235 Cachan (France); Tallaire, A., E-mail: alexandre.tallaire@lspm.cnrs.fr; Achard, J.; Mille, V.; Gicquel, A. [Laboratoire des Sciences des Procédés et des Matériaux, CNRS and Université Paris 13, 93340 Villetaneuse (France)

2014-03-17T23:59:59.000Z

36

Dynamic behavior analysis for a six axis industrial machining robot  

E-Print Network (OSTI)

The six axis robots are widely used in automotive industry for their good repeatability (as defined in the ISO92983) (painting, welding, mastic deposition, handling etc.). In the aerospace industry, robot starts to be used for complex applications such as drilling, riveting, fiber placement, NDT, etc. Given the positioning performance of serial robots, precision applications require usually external measurement device with complexes calibration procedure in order to reach the precision needed. New applications in the machining field of composite material (aerospace, naval, or wind turbine for example) intend to use off line programming of serial robot without the use of calibration or external measurement device. For those applications, the position, orientation and path trajectory precision of the tool center point of the robot are needed to generate the machining operation. This article presents the different conditions that currently limit the development of robots in robotic machining applications. We ana...

Bisu, Claudiu-Florinel; Gérard, Alain; K'Nevez, Jean-Yves

2012-01-01T23:59:59.000Z

37

Design and implementation of five-axis transformation function in CNC system  

Science Journals Connector (OSTI)

Abstract To implement five-axis functions in CNC system, based on domestic system Lan Tian series, an improved design method for the system software structure is proposed in this paper. The numerical control kernel of CNC system is divided into the task layer and the motion layer. A five-axis transformation unit is integrated into the motion layer. After classifying five-axis machines into different types and analyzing their geometry information, the five-axis kinematic library is designed according to the abstract factory pattern. Furthermore, by taking CA spindle-tilting machine as an example, the forward and the inverse kinematic transformations are deduced. Based on the new software architecture and the five-axis kinematic library, algorithms of RTCP (rotation tool center point control) and 3D radius compensation for end-milling are designed and realized. The milling results show that, with five-axis functions based on such software structure, the instructions with respect to the cutter’s position and orientation can be directly carried out in the CNC system.

Feng Wang; Hu Lin; Liaomo Zheng; Lei Yang; Jinjin Feng; Han Zhang

2014-01-01T23:59:59.000Z

38

Dual Axis Radiographic Hydrodynamic Test Facility  

NLE Websites -- All DOE Office Websites (Extended Search)

DARHT Facility: A critical component of stockpile stewardship DARHT Facility: A critical component of stockpile stewardship A new research frontier awaits! Our door is open and we thrive on mutually beneficial partnerships, collaborations that drive innovations and new technologies. April 12, 2012 Dominic Tafoya and Dave Honaberger prepare a refurbished DARHT (Dual Axis Radiographic Hydrotest Facility) 2nd axis accelerator cell for magnetic axis alignment measurements. Contact Group Leader Terry Priestley (505) 665-1330 Email Deputy Group Leader Tim Ferris (505) 665-2179 Email Hydrotests are critical in assessing nuclear weapons in nation's stockpile Dual Axis Radiographic Hydrodynamic Test facility 4:17 How DARHT Works The weapons programs at Los Alamos have one principal mission: ensure the safety, security, and effectiveness of nuclear weapons in our nation's

39

Vertical Axis Wind Turbine Foundation parameter study  

SciTech Connect

The dynamic failure criterion governing the dimensions of prototype Vertical Axis Wind Turbine Foundations is treated as a variable parameter. The resulting change in foundation dimensions and costs is examined.

Lodde, P.F.

1980-07-01T23:59:59.000Z

40

Automatic 5-axis NC toolpath generation  

E-Print Network (OSTI)

Despite over a decade of research, automatic toolpath generation has remained an elusive goal for 5-axis NC machining. This thesis describes the theoretical and practical issues associated with generating collision free ...

Balasubramaniam, Mahadevan, 1976-

2001-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "band axis orientation" 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

Sandia National Laboratories: Innovative Offshore Vertical-Axis...  

NLE Websites -- All DOE Office Websites (Extended Search)

WindInnovative Offshore Vertical-Axis Wind Turbine Rotors Innovative Offshore Vertical-Axis Wind Turbine Rotors This project seeks to advance large offshore vertical-axis wind...

42

Band-Gap Engineering of Carbon Nanotubes with Grain Boundaries  

SciTech Connect

Structure and electronic properties of carbon nanotubes (CNTs) with grain boundaries (GBs) are investigated using density-functional calculations, where the GBs parallel and perpendicular to the tube axis are considered. Simulation results show that the GBs have a great effect on the electronic properties of the CNTs. For the GBs along the tube axis, the CNTs are narrow or zero band gap (<0.16 eV) materials, independent of the misorientation angle and diameter. For the GBs perpendicular to the tube axis, localized electronic states appear within the GBs regions, leading to a larger band gap of up to 0.6 eV. It is convenient to transport and localize the electrons and holes by engineering the GBs. These findings are of great significance for developing carbon-based nanomaterials and electronic devices.

Wang, Zhiguo; Zhou, Yungang; Zhang, Yanwen; Gao, Fei

2012-01-26T23:59:59.000Z

43

Band-Gap Engineering of Carbon Nanotubes with Grain Boundaries  

SciTech Connect

Structure and electronic properties of carbon nanotubes (CNTs) with grain boundaries (GBs) are investigated using density-functional calculations, where the GBs parallel and perpendicular to the tube axis are considered. Simulation results show that the GBs have a great effect on the electronic properties of the CNTs. For the GBs along the tube axis, the CNTs are narrow or zero band gap (<0.16 eV) materials, independent of the misoritentaion angle and diameter. For the GBs perpendicular to the tube axis, localized electronic states appear within the GBs regions, leading to a larger band gap of up to 0.6 eV. It is convenient to transport and localize the electrons and holes by engineering the GBs. These findings are of great significance for developing carbon-based nanomaterials and electronic devices.

Wang, Zhiguo [Department of Applied Physics, University of Electronic Science and Technology of China; Zhou, Yungang [Department of Applied Physics, University of Electronic Science and Technology of China; Zhang, Yanwen [ORNL; Gao, Fei [ORNL

2011-01-01T23:59:59.000Z

44

T-613: Microsoft Excel Axis Properties Remote Code Execution...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

3: Microsoft Excel Axis Properties Remote Code Execution Vulnerability T-613: Microsoft Excel Axis Properties Remote Code Execution Vulnerability May 2, 2011 - 7:42am Addthis...

45

Solasta aka The Eagle Axis | Open Energy Information  

Open Energy Info (EERE)

Eagle Axis Jump to: navigation, search Name: Solasta (aka The Eagle Axis) Place: Newton, Massachusetts Zip: 2458 Sector: Efficiency, Solar Product: Start-up planning to produce...

46

Axis Technologies Group Inc | Open Energy Information  

Open Energy Info (EERE)

Axis Technologies Group Inc Axis Technologies Group Inc Jump to: navigation, search Name Axis Technologies Group, Inc Place Lincoln, Nebraska Zip 68522 Product Designs, manufactures, and markets energy-saving and daylight harvesting electronic dimming ballasts for the commercial lighting industry. Coordinates 47.829403°, -118.419202° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":47.829403,"lon":-118.419202,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

47

Enclosed, off-axis solar concentrator  

DOE Patents (OSTI)

A solar concentrator including a housing having receiving wall, a reflecting wall and at least two end walls, the receiving, reflecting and end walls defining a three-dimensional volume having an inlet, wherein a vertical axis of the housing is generally perpendicular to the inlet, a receiver mounted on the receiving wall of the housing, the receiver including at least one photovoltaic cell, wherein a vertical axis of the receiver is disposed at a non-zero angle relative to the vertical axis of the housing, at least one clip disposed on the reflecting wall an optical element received within the three-dimensional volume, the optical element including at least one tab, the tab being engaged by the clip to align the optical element with the receiver, and a window received over the inlet to enclose the housing.

Benitez, Pablo; Grip, Robert E; Minano, Juan C; Narayanan, Authi A; Plesniak, Adam; Schwartz, Joel A

2013-11-26T23:59:59.000Z

48

New-Hire Orientation  

NLE Websites -- All DOE Office Websites (Extended Search)

Orientation Orientation New-Hire Orientation All foreign nationals including students and postdocs must complete this process. Contact (505) 665-7158 Email Orientation Do not report to the New-Hire Orientation until you have been scheduled by your Human Resources (HR) Division representative. Orientation for all new employees begins promptly Monday mornings at 8:30 am at the Bradbury Science Museum (667-4444), which is on the corner of 15th Street and Central Avenue in Los Alamos. If Monday is a holiday, the New-Hire Orientation will be held on Tuesday. Directions to Bradbury Science Museum: Check maps for exact locations Laboratory Delayed Opening or Closure Due to Inclement Weather (pdf) Be sure to bring your required documents to New-Hire Orientation Day 1 schedule

49

New-Hire Orientation  

NLE Websites -- All DOE Office Websites (Extended Search)

Orientation Orientation New-Hire Orientation All foreign nationals, including students and postdocs, must select the foreign nationals employment category to complete the new-hire process. Contact (505) 665-7158 Email Orientation Do not report to the New-Hire Orientation until you have been scheduled by your Human Resources (HR) Division representative. Orientation for all new employees begins promptly Monday mornings at 8:30 am at the Bradbury Science Museum (667-4444), which is on the corner of 15th Street and Central Avenue in Los Alamos. If Monday is a holiday, the new-hire orientation will be held on Tuesday. Directions to Bradbury Science Museum Check maps for exact locations Laboratory Delayed Opening or Closure Due to Inclement Weather (pdf) Be sure to bring your required documents to New-Hire Orientation

50

A low order model for vertical axis wind turbines  

E-Print Network (OSTI)

A new computational model for initial sizing and performance prediction of vertical axis wind turbines

Drela, Mark

51

High payload six-axis load sensor  

DOE Patents (OSTI)

A repairable high-payload six-axis load sensor includes a table, a base, and at least three shear-pin load transducers removably mounted between the table and the base. Removable mounting permits easy replacement of damaged shear pins. Preferably, the shear-pin load transducers are responsive to shear forces imparted along the two axes perpendicular to an axis of minimum sensitivity characteristic of the transducer. Responsive to an applied shear force, each shear-pin load transducer can produce an electrical signal proportional to the reaction force. The load sensor can further include a structure for receiving the proportional electrical signals and computing the applied load corresponding to the proportional electrical signals. The computed load can be expressed in terms of a three-dimensional XYZ Cartesian coordinate system.

Jansen, John F. (Knoxville, TN); Lind, Randall F. (Knoxville, TN)

2003-01-01T23:59:59.000Z

52

Space variations in axis height of the jet stream core  

E-Print Network (OSTI)

height of the jet axis relative to the height of the jet maximum for slow vs. fast cases. 13 Mean height of the jet axis relative to the height at the trough. 13 Mean height of the jet axis relative to the height at the ridge. 15 Mean height... of the jet axis relative to the height at the jet maximum, when the maximum is near a trough. 15 Mean height of the jet axis relative to the height at the minimum, when the minimum is near a ridge. 17 Mean height of the jet axis relative to the height...

Leutwyler, Cooke Hearon

1965-01-01T23:59:59.000Z

53

Formation and dynamics of easy orientation axis in magnetic field on PVCN-F surface  

E-Print Network (OSTI)

of Sciences of Ukraine, 46 Nauki Str., 03-039 Kyiv, Ukraine 2Condensed Phase Dynamics Group, University University, 6 Glushkova Str., 03-680, Kyiv, Ukraine We describe the experiments on a magnetically

Reznikov, Yuri

54

Multi-axis Capability for Powered Ankle-Foot Prostheses  

Science Journals Connector (OSTI)

In this chapter, the concept of a multi-axis powered ankle-foot prosthesis is introduced. The feasibility of this ... proposed cable-driven mechanism for the multi-axis powered ankle-foot prosthesis is capable of...

Evandro M. Ficanha; Mohammad Rastgaar; Kenton R. Kaufman

2014-01-01T23:59:59.000Z

55

Vertical axis wind turbine with continuous blade angle adjustment  

E-Print Network (OSTI)

The author presents a concept for a vertical axis wind turbine that utilizes each blade's entire rotational cycle for power generation. Each blade has its own vertical axis of rotation and is constrained to rotate at the ...

Weiss, Samuel Bruce

2010-01-01T23:59:59.000Z

56

Control of magnetization reversal in oriented strontium ferrite thin films  

SciTech Connect

Oriented Strontium Ferrite films with the c axis orientation were deposited with varying oxygen partial pressure on Al{sub 2}O{sub 3}(0001) substrate using Pulsed Laser Deposition technique. The angle dependent magnetic hysteresis, remanent coercivity, and temperature dependent coercivity had been employed to understand the magnetization reversal of these films. It was found that the Strontium Ferrite thin film grown at lower (higher) oxygen partial pressure shows Stoner-Wohlfarth type (Kondorsky like) reversal. The relative importance of pinning and nucleation processes during magnetization reversal is used to explain the type of the magnetization reversal with different oxygen partial pressure during growth.

Roy, Debangsu, E-mail: debangsu@physics.iisc.ernet.in; Anil Kumar, P. S. [Department of Physics, Indian Institute of Science, Bangalore 560012 (India)

2014-02-21T23:59:59.000Z

57

Three-dimensional Numerical Analysis on Blade Response of Vertical Axis Tidal Current Turbine Under Operational Condition  

SciTech Connect

Tidal power as a large-scale renewable source of energy has been receiving significant attention recently because of its advantages over the wind and other renewal energy sources. The technology used to harvest energy from tidal current is called a tidal current turbine. Though some of the principles of wind turbine design are applicable to tidal current turbines, the design of latter ones need additional considerations like cavitation damage, corrosion etc. for the long-term reliability of such turbines. Depending up on the orientation of axis, tidal current turbines can be classified as vertical axis turbines or horizontal axis turbines. Existing studies on the vertical axis tidal current turbine focus more on the hydrodynamic aspects of the turbine rather than the structural aspects. This paper summarizes our recent efforts to study the integrated hydrodynamic and structural aspects of the vertical axis tidal current turbines. After reviewing existing methods in modeling tidal current turbines, we developed a hybrid approach that combines discrete vortex method -finite element method that can simulate the integrated hydrodynamic and structural response of a vertical axis turbine. This hybrid method was initially employed to analyze a typical three-blade vertical axis turbine. The power coefficient was used to evaluate the hydrodynamic performance, and critical deflection was considered to evaluate the structural reliability. A sensitivity analysis was also conducted with various turbine height-to-radius ratios. The results indicate that both the power output and failure probability increase with the turbine height, suggesting a necessity for optimal design. An attempt to optimize a 3-blade vertical axis turbine design with hybrid method yielded a ratio of turbine height to radius (H/R) about 3.0 for reliable maximum power output.

Li, Ye; Karri, Naveen K.; Wang, Qi

2014-04-30T23:59:59.000Z

58

Two-axis tracking solar collector mechanism  

DOE Patents (OSTI)

This invention is a novel solar tracking mechanism incorporating a number of practical features that give it superior environmental resilience and exceptional tracking accuracy. The mechanism comprises a lightweight space-frame assembly supporting an array of point-focus Fresnel lenses in a two-axis tracking structure. The system is enclosed under a glass cover which isolates it from environmental exposure and enhances tracking accuracy by eliminating wind loading. Tracking accuracy is also enhanced by the system's broad-based tracking support. The system's primary intended application would be to focus highly concentrated sunlight into optical fibers for transmission to core building illumination zones, and the system may also have potential for photovoltaic or photothermal solar energy conversion.

Johnson, Kenneth C. (201 W. California Ave. #705, Sunnyvale, CA 94086)

1992-01-01T23:59:59.000Z

59

Vertical axis wind turbine control strategy  

SciTech Connect

Early expensive in automatic operation of the Sandia 17-m vertical axis research wind turbine (VAWT) has demonstrated the need for a systematic study of control algorithms. To this end, a computer model has been developed that uses actual wind time series and turbine performance data to calculate the power produced by the Sandia 17-m VAWT operating in automatic control. The model has been used to investigate the influence of starting algorithms on annual energy production. The results indicate that, depending on turbine and local wind characteristics, a bad choice of a control algorithm can significantly reduce overall energy production. The model can be used to select control algorithms and threshold parameters that maximize long-term energy production. An attempt has been made to generalize these results from local site and turbine characteristics to obtain general guidelines for control algorithm design.

McNerney, G.M.

1981-08-01T23:59:59.000Z

60

Two-axis tracking solar collector mechanism  

DOE Patents (OSTI)

This invention is a novel solar tracking mechanism incorporating a number of practical features that give it superior environmental resilience and exceptional tracking accuracy. The mechanism comprises a lightweight space-frame assembly supporting an array of point-focus Fresnel lenses in a two-axis tracking structure. The system is enclosed under a glass cover which isolates it from environmental exposure and enhances tracking accuracy by eliminating wind loading. Tracking accuracy is also enhanced by the system's broad-based tracking support. The system's primary intended application would be to focus highly concentrated sunlight into optical fibers for transmission to core building illumination zones, and the system may also have potential for photovoltaic or photothermal solar energy conversion. 16 figs.

Johnson, K.C.

1992-12-08T23:59:59.000Z

Note: This page contains sample records for the topic "band axis orientation" 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

Two-axis tracking solar collector mechanism  

DOE Patents (OSTI)

This invention is a novel solar tracking mechanism incorporating a number of practical features that give it superior environmental resilience and exceptional tracking accuracy. The mechanism comprises a lightweight space-frame assembly supporting an array of point-focus Fresnel lenses in a two-axis tracking structure. The system is enclosed under a glass cover which isolates it from environmental exposure and enhances tracking accuracy by eliminating wind loading. Tracking accuracy is also enhanced by the system's broad-based tracking support. The system's primary intended application would be to focus highly concentrated sunlight into optical fibers for transmission to core building illumination zones, and the system may also have potential for photovoltaic or photothermal solar energy conversion.

Johnson, Kenneth C. (201 W. California Ave., #401, Sunnyvale, CA 94086)

1990-01-01T23:59:59.000Z

62

New Employee Orientation  

NLE Websites -- All DOE Office Websites (Extended Search)

New Employee New Employee Orientation About the U.S. DOE-ID What To Bring On Your First Day Benefits and Pay Information Federal Employees Health Benefits (FEHB) Federal Employees' Group Life Insurance (FEGLI) Thrift Savings Plan (TSP) A Family-Friendly Workplace Benefit Forms DOE Substance Abuse Testing Program Security Forms and Information Links You are here: DOE-ID Home > Inside ID > Orientation Previous Page New Employee Orientation Welcome to the U.S. Department of Energy, Idaho Operations Office (DOE-ID). Whether you are entering civilian service for the first time, returning after a break in service, or transferring from another Federal agency, this orientation provides the information you need on employment, employee benefit programs, and all of the forms you will need to complete, print out, and bring with you on your first day of work.

63

Optic Orientation in Stereo  

Science Journals Connector (OSTI)

The visualization and representation of optic orientation is the nittygritty of practical optical mineralogy. A complete description is concisely made with the use of a stereographic projection. Perspective dr...

Richard E. Stoiber; Stearns A. Morse

1994-01-01T23:59:59.000Z

64

Rapid Communication Orientation selectivity in luminance and color vision assessed using  

E-Print Network (OSTI)

Rapid Communication Orientation selectivity in luminance and color vision assessed using 2-d band orientation noise isolating the achromatic, red­green and blue­yellow mechanisms, and matched in multiples and boundaries primarily defined by luminance contrast (Livingstone & Hubel, 1987, 1988). For example, both red­green

Mullen, Kathy T.

65

A comparison of on-axis and off-axis heliostat alignment strategies  

SciTech Connect

Heliostat installation and alignment costs will be an important element in future solar power tower projects. The predicted annual performances of on- and-off axis strategies are compared for 95 m{sup 2} flat-glass heliostats and an external, molten-salt receiver. Actual approaches to heliostat alignment that have been used in the past are briefly discussed, and relative strengths and limitations are noted. The optimal approach can vary with the application.

Jones, S.A.

1996-03-01T23:59:59.000Z

66

E-Print Network 3.0 - axis factoring method Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Once this is done, we can call the setup method to properly initialize the axis... On: color values start end moveBy scaleFactor minValue maxValue AbstractAxis AxisAxisDecorator...

67

Action-Oriented Benchmarking:  

NLE Websites -- All DOE Office Websites (Extended Search)

Feb-2008 submitted to Energy Engineering Feb-2008 submitted to Energy Engineering Action-Oriented Benchmarking: Concepts and Tools Evan Mills, Paul Mathew & Mary Ann Piette, Lawrence Berkeley National Laboratory Norman Bourassa & Martha Brook, California Energy Commission ABSTRACT Most energy benchmarking tools provide static feedback on how one building compares to a larger set of loosely similar buildings, without providing information at the end-use level or on what can be done to reduce consumption, cost, or emissions. In this article-Part 1 of a two-part series-we describe an "action-oriented benchmarking" approach, which extends whole-building energy benchmarking to include analysis of system and component energy use metrics and features. Action-oriented benchmarking thereby allows users to generate more meaningful

68

Band crossing in a shears band of {sup 108}Cd  

SciTech Connect

The level lifetimes have been measured for a shears band of {sup 108}Cd that exhibits band crossing. The observed level energies and B(M1) rates have been successfully described by a semiclassical geometric model based on shear mechanism. In this geometric model, the band crossing in the shears band has been described as the reopening of the angle between the blades of a shear.

Roy, Santosh; Datta, Pradip; Pal, S.; Chattopadhyay, S.; Bhattacharya, S.; Goswami, A.; Jain, H. C.; Joshi, P. K.; Bhowmik, R. K.; Kumar, R.; Muralithar, S.; Singh, R. P.; Madhavan, N.; Rao, P. V. Madhusudhana [S. N. Bose National Centre for Basic Sciences. Block JD, Sector III, Saltlake City, Kolkata 700098 (India); iThemba Labs, Post Office Box 722, Somerset West 7129 (South Africa); Saha Institute of Nuclear Physics, 1/AF Bidhannager Kolkata, 700 064 (India); Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005 (India); Inter University Accelerator Center, Aruna Asaf Ali Marg, New Delhi 110 067 (India); Department of Physics, Andra University, Visakhapatnam 530 003 (India)

2010-05-15T23:59:59.000Z

69

New Employee Orientation Packet  

NLE Websites -- All DOE Office Websites (Extended Search)

Southwestern Employee Orientation Packet Southwestern Employee Orientation Packet IMPORTANT: Please click on the links below; print the forms; complete them as soon as possible; place them in the addressed envelope you were provided; and mail them to the Division of Human Resources at Southwestern Power Administration. This information is needed to process your appointment and issue your first paycheck. Answers on forms should be truthful and complete. A false statement on any form may be grounds for not hiring you, or for firing you after you begin work. If you have any questions, contact your Southwestern Human Resources Specialist. Background Investigation Memorandum Description: Outlines Southwestern's policies regarding background investigations. Instructions: Sign and date.

70

Event Rates for Off Axis NuMI Experiments  

E-Print Network (OSTI)

Neutrino interaction rates for experiments placed off axis in the NuMI beam are calculated. Primary proton beam energy is 120 GeV and four locations at 810 km from target and 6, 12, 30 and 40 km off axis are considered. This report is part of the Joint FNAL/BNL Future Long Baseline Neutrino Oscillation Experiment Study.

B. Viren

2006-08-25T23:59:59.000Z

71

Modeling of strained quantum wires using eight-band k?p theory  

Science Journals Connector (OSTI)

We have calculated numerically the one-dimensional band structure and densities of states of a V-shaped In0.2Ga0.8As/AlxGa1-xAs single quantum wire using eight-band k?p theory. A finite-difference scheme is used for the calculations. The model includes the realistic orientation, shape, material composition, strain distribution, and piezoelectric charging of the wire. We find a dominant impact of the piezoelectric potential on the band structure and a marked spin splitting of the valence bands. Also, the conduction band is strongly nonparabolic. We propose an efficient procedure to calculate interior eigenvectors from Hamiltonians including conduction-band–valence-band interactions. This algorithm is 20–90 times faster than the best prevailing method and also applies to other Hamiltonians for the modeling of nanostructures, including those occurring in tight-binding or pseudopotential theory.

O. Stier and D. Bimberg

1997-03-15T23:59:59.000Z

72

EMPLOYEE SAFETY ORIENTATION  

E-Print Network (OSTI)

Page | 0 EMPLOYEE SAFETY ORIENTATION _________________ Risk, Safety & Security 3333 University Way to be acquainted with the safety program, welcome! Risk, Safety & Security at UNBC is dynamic. With more than 3 worksite and safe work procedures which pertain to your job. The role of the Risk and Safety Office

Bolch, Tobias

73

3-Axis Magnetic Sensor Hybrid The Honeywell HMC2003 is a high sensitivity, three-axis magnetic sensor hybrid  

E-Print Network (OSTI)

3-Axis Magnetic Sensor Hybrid HMC2003 The Honeywell HMC2003 is a high sensitivity, three-axis magnetic sensor hybrid assembly used to measure low magnetic field strengths. Honeywell's most sensitive product excellence and performance by introducing innovative solid-state magnetic sensor solutions

Kleinfeld, David

74

The Orientalism of Byron  

E-Print Network (OSTI)

, Contes Persan^" (1710-1712). The popularity of the above works together with Perrault's fair stories was partly due to a reaction from the dominant classicism of Boileau; then, too, both Galland and Petis de la Croix went to the Bast with embassies... gave a satirical, philosophical view of French society through the Oriental tale, in his *Let- tres Persanes*(1721). Because of the direct influence of numerous translations from the French and because of the presence of tendencies in England...

Osborne, Edna-Pearle

1914-01-01T23:59:59.000Z

75

Service Oriented Internet Jaideep Chandrashekar  

E-Print Network (OSTI)

propose a novel, overlay based Service Oriented Internet architecture that is meant to serve as a flexible elsewhere. In this paper, we describe a new architecture -- the "Service Oriented Internet" or SOI, whichService Oriented Internet Jaideep Chandrashekar ¡ , Zhi-Li Zhang ¡ , Zhenhai Duan ¡ , and Y

Duan, Zhenhai

76

DARHT: Dual-Axis Radiographic Hydrodynamic Test Facility  

NLE Websites -- All DOE Office Websites (Extended Search)

DARHT: Dual-Axis Radiographic Hydrodynamic Test Facility DARHT: Dual-Axis Radiographic Hydrodynamic Test Facility DARHT: Dual-Axis Radiographic Hydrodynamic Test Facility DARHT, supports a critical component of LANL's primary mission: to ensure the safety, security, and effectiveness of nuclear weapons in our nation's stockpile. Los Alamos scientists built DARHT, the world's most powerful x-ray machine, to analyze mockups of nuclear weapons. At the Los Alamos National Laboratory (LANL), the Dual-Axis Radiographic Hydrodynamic Test Facility, or DARHT, supports a critical component of LANL's primary mission: to ensure the safety, security, and effectiveness of nuclear weapons in our nation's stockpile. Los Alamos scientists built DARHT, the world's most powerful x-ray machine, to analyze mockups of nuclear weapons.

77

Curvature gouge detection and prevention in 5-axis CNC machining.  

E-Print Network (OSTI)

??Five-axis CNC machining presents high efficiency and unparallel flexibility in the machining of complex curved surfaces. However, generation of gouge-free CNC tool path and cutter… (more)

Wang, Yin Jack

2010-01-01T23:59:59.000Z

78

A hybrid type small 5-axis CNC milling machine  

E-Print Network (OSTI)

5-axis CNC milling machines are important in a number of industries ranging from aerospace to consumer-die-mold machining because they can deliver high machining accuracy with a spindle tilting capacity. Most of these ...

Son, Seung-Kil, 1964-

2002-01-01T23:59:59.000Z

79

Center of pressure calculations for a bent-axis vehicle  

SciTech Connect

Bent-axis maneuvering vehicles provide a unique type of control for a variety of supersonic and hypersonic missions. Unfortunately, large hinge moments, incomplete pitching moment predictions, and a misunderstanding of corresponding center of pressure calculations have prevented their application. A procedure is presented for the efficient design of bent-axis vehicles given an adequate understanding of origins of pitching moment effects. In particular,sources of pitching moment contributions will be described including not only normal force, but inviscid axial force and viscous effects as well. Off-centerline center of pressure effects are first reviewed for symmetric hypersonic sphere-cone configurations. Next the effects of the bent-axis geometry are considered where axial force, acting on the deflected tail section, can generate significant pitching moment components. The unique relationship between hinge moments and pitching moments for the bent-axis class of vehicles is discussed. 15 refs.

Rutledge, W.H.; Polansky, G.F.

1992-01-01T23:59:59.000Z

80

EIS-0228: Dual Axis Radiographic Hydrodynamic Test (DARHT) Facility  

Energy.gov (U.S. Department of Energy (DOE))

This EIS evaluates the potential environmental impact of a proposal to construct and operate the Dual Axis Radiographic Hydrodynamic Test (DARHT) facility at Los Alamos National Laboratory (LANL)...

Note: This page contains sample records for the topic "band axis orientation" 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

Band magnetism in the Hubbard model  

Science Journals Connector (OSTI)

A self-consistent moment method is applied to the Hubbard model in order to find out under what circumstances spontaneous band magnetism may occur. The theory is formulated for a two-sublattice structure to treat simultaneously para-, ferro-, and antiferromagnetic systems. The starting point is a two-pole ansatz for the one-electron spectral density, the free parameters of which are fitted by equating exactly calculated spectral moments. All correlation functions appearing in the moments can be expressed by the spectral density, guaranteeing therewith a closed system of equations, which can be solved self-consistently for the average particle numbers ?ni?? and ?ni??. A T=0 phase diagram is presented in terms of band occupation n (0?n?2) and Coulomb interaction U. Ferromagnetic solutions appear only if n exceeds a critical occupation ncFM and U a minimum value Umin. For antiferromagnetic solutions a critical U does not exist, but a critical band occupation ncAFM does.Antiferromagnetism is stable in a restricted region of n around n=1, which is broadest for intermediate couplings (U/W?1, W being the Bloch bandwidth) and shrinks to the n=1 axis for strong couplings (U/W??). For smaller n, but n>ncFM and sufficiently high U (U>W), ferromagnetism is stable, while for low band occupations the system is paramagnetic irrespective of U. The critical temperatures TC and TN are strongly U and n dependent. For fixed n, TC increases with U, but saturates for U?? at finite values (500–800 K), while TN has a maximum at an intermediate U value (U?W). First-order as well as second-order transitions are observed. Ferromagnetic order arises mainly because of a shift of ? and ? quasiparticle subbands. In antiferromagnets, corresponding ? and ? subbands occupy exactly the same energy regions, but with different state densities. The magnetic behavior of the Hubbard model can be understood as a direct consequence of the sensitive (T,n,U) dependence of the quasiparticle density of states, which is therefore discussed in detail.

W. Nolting and W. Borgiel/

1989-04-01T23:59:59.000Z

82

Inversion of azimuthally dependent NMO velocity in transversely isotropic media with a tilted axis of symmetry  

SciTech Connect

Just as the transversely isotropic model with a vertical symmetry axis (VTI media) is typical for describing horizontally layered sediments, transverse isotropy with a tilted symmetry axis (TTI) describes dipping TI layers (such as tilted shale beds near salt domes) or crack systems. P-wave kinematic signatures in TTI media are controlled by the velocity V{sub PO} in the symmetry direction, Thomsen's anisotropic coefficients {xi} and {delta}, and the orientation (tilt {nu} and azimuth {beta}) of the symmetry axis. Here, the authors show that all five parameters can be obtained from azimuthally varying P-wave NMO velocities measured for two reflectors with different dips and/or azimuths (one of the reflectors can be horizontal). The shear-wave velocity V{sub SO} in the symmetry direction, which has negligible influence on P-wave kinematic signatures, can be found only from the moveout of shear waves. Using the exact NMO equation, the authors examine the propagation of errors in observed moveout velocities into estimated values of the anisotropic parameters and establish the necessary conditions for a stable inversion procedure. Since the azimuthal variation of the NMO velocity is elliptical, each reflection event provides them with up to three constraints on the model parameters. Generally, the five parameters responsible for P-wave velocity can be obtained from two P-wave ellipses, but the feasibility of the moveout inversion strongly depends on the tilt {nu}. While most of the analysis is carried out for a single layer, the authors also extend the inversion algorithm to vertically heterogeneous TTI media above a dipping reflector using the generalized Dix equation. A synthetic example for a strongly anisotropic, stratified TTI medium demonstrates a high accuracy of the inversion.

Grechka, V.; Tsvankin, I.

2000-02-01T23:59:59.000Z

83

Oriented niobate ferroelectric thin films for electrical and optical devices  

DOE Patents (OSTI)

Sr.sub.x Ba.sub.1-x Nb.sub.2 O.sub.6, where x is greater than 0.25 and less than 0.75, and KNbO.sub.3 ferroelectric thin films metalorganic chemical vapor deposited on amorphous or cyrstalline substrate surfaces to provide a crystal axis of the film exhibiting a high dielectric susceptibility, electro-optic coefficient, and/or nonlinear optic coefficient oriented preferentially in a direction relative to a crystalline or amorphous substrate surface. Such films can be used in electronic, electro-optic, and frequency doubling components.

Wessels, Bruce W. (Wilmette, IL); Nystrom, Michael J. (Chicago, IL)

2001-01-01T23:59:59.000Z

84

ARM Orientation Workshop  

NLE Websites -- All DOE Office Websites (Extended Search)

Finding " Finding " " Stuff Stuff " " from from ARM Web Site and Data ARM Web Site and Data Archive Archive Orientation for new Science Team Members Topics Topics Navigating ARM web site Navigating ARM web site - - finding ARM information finding ARM information Demo of Archive access Demo of Archive access - - Finding and requesting ARM data files Finding and requesting ARM data files - - (with web shopping cart interface) (with web shopping cart interface) Other Archive access options Other Archive access options - - Brief logical comparison Brief logical comparison - - (additional details as requested) (additional details as requested) Other documentation topics Other documentation topics - - (per user interest and time availability) (per user interest and time availability)

85

Determination of crystallographic orientation of lead-free piezoelectric (K,Na)NbO{sub 3} epitaxial thin films grown on SrTiO{sub 3} (100) surfaces  

SciTech Connect

Crystallographic structure of sol-gel-processed lead-free (K,Na)NbO{sub 3} (KNN) epitaxial films on [100]-cut SrTiO{sub 3} single-crystalline substrates was investigated for a deeper understanding of its piezoelectric response. Lattice parameter measurement by high-resolution X-ray diffraction and transmission electron microscopy revealed that the orthorhombic KNN films on SrTiO{sub 3} (100) surfaces are [010] oriented (b-axis-oriented) rather than commonly identified c-axis orientation. Based on the crystallographic orientation and corresponding ferroelectric domain structure investigated by piezoresponse force microscopy, the superior piezoelectric property along b-axis of epitaxial KNN films than other orientations can be explained.

Yu, Qi; Zhu, Fang-Yuan; Cheng, Li-Qian; Wang, Ke; Li, Jing-Feng, E-mail: jingfeng@mail.tsinghua.edu.cn [State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, 100084 Beijing (China)] [State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, 100084 Beijing (China)

2014-03-10T23:59:59.000Z

86

Impacts of Raindrop Fall Velocity and Axis Ratio Errors on Dual-Polarization Radar Rainfall Estimation  

Science Journals Connector (OSTI)

Motivated by the field observations of fall velocity and axis ratio deviations from predicted terminal velocity and equilibrium axis ratio values, the combined effects of raindrop fall velocity and axis ratio deviations on dual-polarization radar ...

Bin Pei; Firat Y. Testik; Mekonnen Gebremichael

2014-10-01T23:59:59.000Z

87

New Employee Orientation- Forms Checklist  

Energy.gov (U.S. Department of Energy (DOE))

Listing of the forms to be issued and collected at a new employee's orientation. Please review the checklist to ensure that you bring all of the needed forms.

88

Red Raider Orientation COLLEGE DISMISSAL  

E-Print Network (OSTI)

and Management Wildlife Science #12;RED RAIDER ORIENTATION University Studies University Studies Wind Energy Architecture Natural Resources Management Plant & Soil Science Wildlife, Aquatic, & Wildlands Science

Rock, Chris

89

ARM Orientation Workshop  

NLE Websites -- All DOE Office Websites (Extended Search)

Obtaining Data from the Obtaining Data from the ACRF Archive Orientation for new Science Team Members One click to the ACRF Data Archive ACRF Data Archive - Newly Designed Home Page Emphasis on guiding users in their selection of data access tools Accessing ARM Data: Options Comparison of Browser/Interface Options Interface name Accessible data "Shopping" approach (armarchive@ornl.gov, 1-888-ARM-DATA) ARM Data Browser Routine ARM data "I know what I want. Do you have it?" Searching with predefined selection criteria. Catalog Interface Routine ARM data "I am not sure what I want. I need to see what you have available." Browsing a hierarchy of availability summaries. Thumbnail Browser Most routine ARM data "I will know what I want when I see it." Searching with a combination of predefined selection

90

ARM Orientation Workshop  

NLE Websites -- All DOE Office Websites (Extended Search)

Data from the Getting Data from the Data from the Getting Data from the ARM Archive ARM Archive Orientation for new Science Team Members ARM Shopping Cart Tutorial ARM Shopping Cart Tutorial Available at: Available at: http://dev.www.arm.gov/data/arm_orderData_tutorial.html http://dev.www.arm.gov/data/arm_orderData_tutorial.html Types of Quality Information Types of Quality Information Automated products Automated products QC flags QC flags inserted in data files during processing inserted in data files during processing Summaries of flags (data color) Summaries of flags (data color) Manual products Manual products Data Quality Reports (DQRs) Data Quality Reports (DQRs) web accessible reports; delivered as html files after data web accessible reports; delivered as html files after data

91

Towards dependable service-orientated computing systems 1. Service-orienting computing systems  

E-Print Network (OSTI)

in service-oriented architecture, service-oriented computing paradigm, and service-oriented development lifespan. Service-oriented computing systems started with the concept of Service-Oriented Architecture (SOAEditorial Towards dependable service-orientated computing systems 1. Service-orienting computing

Chen, Yinong

92

Z-Axis Tipper Electromagnetics | Open Energy Information  

Open Energy Info (EERE)

Z-Axis Tipper Electromagnetics Z-Axis Tipper Electromagnetics Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Z-Axis Tipper Electromagnetics Details Activities (2) Areas (2) Regions (0) NEPA(1) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Electrical Techniques Parent Exploration Technique: Magnetotelluric Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Cost Information Low-End Estimate (USD): 4,827.00482,700 centUSD 4.827 kUSD 0.00483 MUSD 4.827e-6 TUSD / mile Median Estimate (USD): 6,206.14620,614 centUSD 6.206 kUSD 0.00621 MUSD 6.20614e-6 TUSD / mile High-End Estimate (USD): 17,239.291,723,929 centUSD 17.239 kUSD 0.0172 MUSD 1.723929e-5 TUSD / mile Dictionary.png

93

T-613: Microsoft Excel Axis Properties Remote Code Execution Vulnerability  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

613: Microsoft Excel Axis Properties Remote Code Execution 613: Microsoft Excel Axis Properties Remote Code Execution Vulnerability T-613: Microsoft Excel Axis Properties Remote Code Execution Vulnerability May 2, 2011 - 7:42am Addthis PROBLEM: Microsoft Excel is prone to a remote code-execution vulnerability because the applications fail to sufficiently validate user-supplied input. PLATFORM: Microsoft Excel (2002-2010) ABSTRACT: Microsoft Excel is prone to a remote code-execution vulnerability because the applications fails to sufficiently validate user-supplied input. Attackers can exploit this issue by enticing an unsuspecting user to open a specially crafted Excel file. Successful exploits can allow attackers to execute arbitrary code with the privileges of the user running the application. Failed exploit attempts will result in a denial-of-service

94

MHK Technologies/Horizontal Axis Logarithmic Spiral Turbine | Open Energy  

Open Energy Info (EERE)

Horizontal Axis Logarithmic Spiral Turbine Horizontal Axis Logarithmic Spiral Turbine < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Technology Profile Primary Organization Golden Turbines LLC Technology Resource Click here Current Technology Type Click here Axial Flow Turbine Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description A Horizontal axis Water turbine following the logarithmic spiral to generate clean electric energy from slow moving currents like rivers or ocean currents and with least impact on marine life and the environment because it doesn t require a damn or building huge structures Technology Dimensions Device Testing Date Submitted 36:09.5 << Return to the MHK database homepage

95

Four-axis micro measuring systems performance verification  

Science Journals Connector (OSTI)

Abstract This article describes the performance verification of 3D optical measuring instruments integrating a rotational axis using an artifact. The goal is the performance verification of four-axis measuring systems for the full 3D acquisition of micro-geometric parts. This type of measurement has many potential applications, such as in micro-tool, micro-mold, or micro-device manufacturing. The artifact is as simple as possible to reduce manufacturing costs, ensure easy calibration, comply with the ISO 10360 standard and consider all volumetric error contributions. The artifact may be useful to both measuring system manufacturers and users to provide a measurement traceability path.

Giovanni Moroni; Stefano Petrò; Wahyudin P. Syam

2014-01-01T23:59:59.000Z

96

On the K{sup {pi}} = 0{sup +} rotational bands in the {sup 178}Hf nucleus  

SciTech Connect

The results obtained by studying the angular distributions of gamma rays with respect to the neutron-beam axis in the reaction {sup 178}Hf(n, n'{gamma}) involving the deexcitation of the K{sup {pi}} = 0{sup +} rotational bands of {sup 178}Hf are presented.New information about themultipole-mixing parameter {delta} in gamma transitions from the levels of these bands is obtained. The K{sup {pi}} = 0{sub 4}{sup +} band is constructed anew. The relationship between the parameter {delta} for the (2{sup +}0{sub n}-2{sup +}0{sub 1}) gamma transition and the energy gap {Delta}{sub n} = E{sub lev}(2{sup +}0{sub n}) - E{sub lev}(0{sup +}0{sub n}), on one hand, and the quasiparticle structure of the rotational band, on the other hand, is discussed for {sup 178}Hf on the basis of the quasiparticle-phonon model.

Govor, L. I.; Demidov, A. M.; Kurkin, V. A., E-mail: kurkin@polyn.kiae.su; Mikhailov, I. V. [Russian Research Centre Kurchatov Institute (Russian Federation)

2010-07-15T23:59:59.000Z

97

Patterns of Service-Oriented Architectures  

E-Print Network (OSTI)

Patterns of Service-Oriented Architectures Uwe Zdun Email: uwe.zdun@wu-wien.ac.at, zdun@acm.org WWW Patterns of Service-Oriented Architectures 1 #12;Agenda · Service-oriented architectures (SOA) · Patterns of Service-Oriented Architectures 2 #12;Service-oriented architectures (SOA) Uwe Zdun, Department

Zdun, Uwe

98

Device Oriented Project Controller  

SciTech Connect

This proposal is directed at the issue of developing control systems for very large HEP projects. A de-facto standard in accelerator control is the Experimental Physics and Industrial Control System (EPICS), which has been applied successfully to many physics projects. EPICS is a channel based system that requires that each channel of each device be configured and controlled. In Phase I, the feasibility of a device oriented extension to the distributed channel database was demonstrated by prototyping a device aware version of an EPICS I/O controller that functions with the current version of the channel access communication protocol. Extensions have been made to the grammar to define the database. Only a multi-stage position controller with limit switches was developed in the demonstration, but the grammar should support a full range of functional record types. In phase II, a full set of record types will be developed to support all existing record types, a set of process control functions for closed loop control, and support for experimental beam line control. A tool to configure these records will be developed. A communication protocol will be developed or extensions will be made to Channel Access to support introspection of components of a device. Performance bench marks will be made on both communication protocol and the database. After these records and performance tests are under way, a second of the grammar will be undertaken.

Dalesio, Leo; Kraimer, Martin

2013-11-20T23:59:59.000Z

99

A Simplified Morphing Blade for Horizontal Axis Wind Turbines  

E-Print Network (OSTI)

A Simplified Morphing Blade for Horizontal Axis Wind Turbines Weijun WANG , St´ephane CARO, Fouad salinas@hotmail.com The aim of designing wind turbine blades is to improve the power capture ability by adjusting the twist of the blade's root and tip. To evaluate the performance of wind turbine blades

Recanati, Catherine

100

E-Print Network 3.0 - axis wind turbines Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

turbines Search Powered by Explorit Topic List Advanced Search Sample search results for: axis wind turbines...

Note: This page contains sample records for the topic "band axis orientation" 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

E-Print Network 3.0 - axis wind turbine Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

turbine Search Powered by Explorit Topic List Advanced Search Sample search results for: axis wind turbine...

102

Anisotropy and crystal orientation of silicon--application to the modeling of a bent mirror  

SciTech Connect

Matrix formula and MATLAB algorithm are proposed to calculate the stiffness coefficient matrix C, the Young's modulus, shear modulus and Poisson ratio for the silicon crystal in any orientation. Results for Si(110) and Si(311) are given as an example. The anisotropic material properties of the silicon have been used in the mirror width profile optimization for the nano-imaging end-station ID22NI at the ESRF. As the Si(110) is used as the substrate of this multilayer coated KB mirror, the silicon crystal axis [0 0 1] is proposed to orient to the mirror axis. This is the case to have low stress in the mirror and low bending forces from actuators.

Zhang Lin [European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble Cedex (France)

2010-06-23T23:59:59.000Z

103

Triaxial shape coexistence and new aligned band in Os178  

Science Journals Connector (OSTI)

High spin states in Os178 were studied by means of Ho165(Ne20,p6n)Os178 fusion evaporation reaction at a beam energy of 150?MeV, using a clover detector array. Several new transitions belonging to Os178 were placed in a level scheme and a new aligned rotational band was observed in addition to earlier known bands. Spin-parity assignments for most of the proposed levels were made using the deduced directional correlation orientation and polarization measurements for the de-exciting transitions. Experimental results are compared with the projected angular momentum deformed Hartree-Fock model calculations and cranked Woods-Saxon model calculations. This nucleus is predicted to be prolate deformed in the ground state but the ?-softness at higher excitation is revealed by the cranked Woods-Saxon model and the geometrical asymmetric model calculations.

Rajesh Kumar, I. M. Govil, A. Dhal, L. Chaturvedi, C. R. Praharaj, A. K. Rath, G. Kiran Kumar, S. K. Basu, A. Chakraborty, Krishichayan, S. Mukhopadhyay, N. S. Pattabiraman, S. S. Ghugre, and A. K. Sinha

2009-11-30T23:59:59.000Z

104

Serotonin, tryptophan metabolism and the brain-gut-microbiome axis  

Science Journals Connector (OSTI)

Abstract The brain-gut axis is a bidirectional communication system between the central nervous system and the gastrointestinal tract. Serotonin functions as a key neurotransmitter at both terminals of this network. Accumulating evidence points to a critical role for the gut microbiome in regulating normal functioning of this axis. In particular, it is becoming clear that the microbial influence on tryptophan metabolism and the serotonergic system may be an important node in such regulation. There is also substantial overlap between behaviours influenced by the gut microbiota and those which rely on intact serotonergic neurotransmission. The developing serotonergic system may be vulnerable to differential microbial colonisation patterns prior to the emergence of a stable adult-like gut microbiota. At the other extreme of life, the decreased diversity and stability of the gut microbiota may dictate serotonin-related health problems in the elderly. The mechanisms underpinning this crosstalk require further elaboration but may be related to the ability of the gut microbiota to control host tryptophan metabolism along the kynurenine pathway, thereby simultaneously reducing the fraction available for serotonin synthesis and increasing the production of neuroactive metabolites. The enzymes of this pathway are immune and stress-responsive, both systems which buttress the brain-gut axis. In addition, there are neural processes in the gastrointestinal tract which can be influenced by local alterations in serotonin concentrations with subsequent relay of signals along the scaffolding of the brain-gut axis to influence CNS neurotransmission. Therapeutic targeting of the gut microbiota might be a viable treatment strategy for serotonin-related brain-gut axis disorders.

S.M. O’Mahony; G. Clarke; Y.E. Borre; T.G. Dinan; J.F. Cryan

2015-01-01T23:59:59.000Z

105

Vertical-axis wind turbines -- The current status of an old technology  

SciTech Connect

Vertical-axis wind turbine technology is not well understood, even though the earliest wind machines rotated about a vertical axis. The operating environment of a vertical-axis wind turbine is quite complex, but detailed analysis capabilities have been developed and verified over the last 30 years. Although vertical-axis technology has not been widely commercialized, it exhibits both advantages and disadvantages compared to horizontal-axis technology, and in some applications, it appears to offer significant advantages.

Berg, D.E.

1996-12-31T23:59:59.000Z

106

FOURTH EDITION SERVICE-ORIENTED COMPUTING AND  

E-Print Network (OSTI)

.........................................................................................................10 1.3 Service-Oriented Architecture and Computingi FOURTH EDITION SERVICE-ORIENTED COMPUTING AND WEB SOFTWARE INTEGRATION FROM PRINCIPLES)............................................................................................................. xviii Part I Distributed Service-Oriented Software Development and Web Data Management

Chen, Yinong

107

THIRD EDITION SERVICE-ORIENTED COMPUTING  

E-Print Network (OSTI)

.........................................................................................................10 1.3 Service-Oriented Architecture and Computing#12;THIRD EDITION SERVICE-ORIENTED COMPUTING AND WEB SOFTWARE INTEGRATION FFRROOMM).................................................................................................................xv Part I Distributed Service-Oriented Software Development and Web Data Management

Chen, Yinong

108

DISTRIBUTED SERVICE-ORIENTED SOFTWARE DEVELOPMENT  

E-Print Network (OSTI)

............................................................................9 1.3 Service-Oriented Architecture and ComputingDISTRIBUTED SERVICE-ORIENTED SOFTWARE DEVELOPMENT FFIIRRSSTT EEDDIITTIIOONN SSEECCOONNDD ..................................................................................................................................ix Chapter 1 Introduction to Distributed Service-Oriented Computing

Chen, Yinong

109

Better Buildings Residential Network Orientation Peer Exchange...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Better Buildings Residential Network Orientation Peer Exchange Webinar Better Buildings Residential Network Orientation Peer Exchange Webinar September 11, 2014 7:00PM to 8:3...

110

ARM Orientation: Overview and History  

NLE Websites -- All DOE Office Websites (Extended Search)

ARM Orientation: ARM Orientation: Overview and History Warren Wiscombe ARM Chief Scientist Brookhaven & NASA ARM ARM Atmospheric Radiation Measurement Atmospheric Radiation Measurement 2 Mar 2006 ARM Orientation You want me to be Chief Scientist? Can you believe this guy? ARM ARM Atmospheric Radiation Measurement Atmospheric Radiation Measurement 3 Mar 2006 ARM Orientation ARM in a nutshell ARM in a nutshell * * Largest global change research program Largest global change research program funded by the U.S. Department of Energy funded by the U.S. Department of Energy ($44M/yr; ~ ($44M/yr; ~ $10M/yr fo $10M/yr fo r Science Team r Science Team ) ) * * Created to improve cloud and radiation Created to improve cloud and radiation physics and cloud simulation capabilities in physics and cloud simulation capabilities in

111

Position and orientation tracking system  

DOE Patents (OSTI)

A position and orientation tracking system presents a laser scanning apparatus having two measurement pods, a control station, and a detector array. The measurement pods can be mounted in the dome of a radioactive waste storage silo. Each measurement pod includes dual orthogonal laser scanner subsystems. The first laser scanner subsystem is oriented to emit a first line laser in the pan direction. The second laser scanner is oriented to emit a second line laser in the tilt direction. Both emitted line lasers scan planes across the radioactive waste surface to encounter the detector array mounted on a target robotic vehicle. The angles of incidence of the planes with the detector array are recorded by the control station. Combining measurements describing each of the four planes provides data for a closed form solution of the algebraic transform describing the position and orientation of the target robotic vehicle. 14 figs.

Burks, B.L.; DePiero, F.W.; Armstrong, G.A.; Jansen, J.F.; Muller, R.C.; Gee, T.F.

1998-05-05T23:59:59.000Z

112

Position and orientation tracking system  

DOE Patents (OSTI)

A position and orientation tracking system presents a laser scanning appaus having two measurement pods, a control station, and a detector array. The measurement pods can be mounted in the dome of a radioactive waste storage silo. Each measurement pod includes dual orthogonal laser scanner subsystems. The first laser scanner subsystem is oriented to emit a first line laser in the pan direction. The second laser scanner is oriented to emit a second line laser in the tilt direction. Both emitted line lasers scan planes across the radioactive waste surface to encounter the detector array mounted on a target robotic vehicle. The angles of incidence of the planes with the detector array are recorded by the control station. Combining measurements describing each of the four planes provides data for a closed form solution of the algebraic transform describing the position and orientation of the target robotic vehicle.

Burks, Barry L. (Oak Ridge, TN); DePiero, Fred W. (Knoxville, TN); Armstrong, Gary A. (Oak Ridge, TN); Jansen, John F. (Knoxville, TN); Muller, Richard C. (Oak Ridge, TN); Gee, Timothy F. (Riceville, TN)

1998-01-01T23:59:59.000Z

113

Broad-band beam buncher  

DOE Patents (OSTI)

A broad-band beam buncher is disclosed, comprising an evacuated housing, an electron gun therein for producing an electron beam, a buncher cavity having entrance and exit openings through which the beam is directed, grids across such openings, a source providing a positive DC voltage between the cavity and the electron gun, a drift tube through which the electron beam travels in passing through such cavity, grids across the ends of such drift tube, gaps being provided between the drift tube grids and the entrance and exit grids, a modulator for supplying an ultrahigh frequency modulating signal to the drift tube for producing velocity modulation of the electrons in the beam, a drift space in the housing through which the velocity modulated electron beam travels and in which the beam is bunched, and a discharge opening from such drift tube and having a grid across such opening through which the bunched electron beam is discharged into an accelerator or the like. The buncher cavity and the drift tube may be arranged to constitute an extension of a coaxial transmission line which is employed to deliver the modulating signal from a signal source. The extended transmission line may be terminated in its characteristic impedance to afford a broad-band response and the device as a whole designed to effect broad-band beam coupling, so as to minimize variations of the output across the response band.

Goldberg, David A. (Walnut Creek, CA); Flood, William S. (Berkeley, CA); Arthur, Allan A. (Martinez, CA); Voelker, Ferdinand (Orinda, CA)

1986-01-01T23:59:59.000Z

114

Energy band alignment of atomic layer deposited HfO{sub 2} oxide film on epitaxial (100)Ge, (110)Ge, and (111)Ge layers  

SciTech Connect

Crystallographically oriented epitaxial Ge layers were grown on (100), (110), and (111)A GaAs substrates by in situ growth process using two separate molecular beam epitaxy chambers. The band alignment properties of atomic layer hafnium oxide (HfO{sub 2}) film deposited on crystallographically oriented epitaxial Ge were investigated using x-ray photoelectron spectroscopy (XPS). Valence band offset, {Delta}E{sub v} values of HfO{sub 2} relative to (100)Ge, (110)Ge, and (111)Ge orientations were 2.8 eV, 2.28 eV, and 2.5 eV, respectively. Using XPS data, variation in valence band offset, {Delta}E{sub V}(100)Ge>{Delta}E{sub V}(111)Ge>{Delta}E{sub V}(110)Ge, was obtained related to Ge orientation. Also, the conduction band offset, {Delta}E{sub c} relation, {Delta}E{sub c}(110)Ge>{Delta}E{sub c}(111)Ge>{Delta}E{sub c}(100)Ge related to Ge orientations was obtained using the measured bandgap of HfO{sub 2} on each orientation and with the Ge bandgap of 0.67 eV. These band offset parameters for carrier confinement would offer an important guidance to design Ge-based p- and n-channel metal-oxide field-effect transistor for low-power application.

Hudait, Mantu K.; Zhu Yan [Advanced Devices and Sustainable Energy Laboratory (ADSEL), Bradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, Virginia 24061 (United States)

2013-03-21T23:59:59.000Z

115

Room temperature in-plane ?100? magnetic easy axis for Fe{sub 3}O{sub 4}/SrTiO{sub 3}(001):Nb grown by infrared pulsed laser deposition  

SciTech Connect

We examine the magnetic easy-axis directions of stoichiometric magnetite films grown on SrTiO{sub 3}:Nb by infrared pulsed-laser deposition. Spin-polarized low-energy electron microscopy reveals that the individual magnetic domains are magnetized along the in-plane ?100? film directions. Magneto-optical Kerr effect measurements show that the maxima of the remanence and coercivity are also along in-plane ?100? film directions. This easy-axis orientation differs from bulk magnetite and films prepared by other techniques, establishing that the magnetic anisotropy can be tuned by film growth.

Monti, Matteo; Sanz, Mikel; Oujja, Mohamed; Rebollar, Esther; Castillejo, Marta; Marco, José F.; Figuera, Juan de la, E-mail: juan.delafiguera@iqfr.csic.es [Instituto de Química Física “Rocasolano,” CSIC, Madrid E-28006 (Spain); Pedrosa, Francisco J.; Bollero, Alberto [IMDEA Nanociencia, Instituto Madrileño de Estudios Avanzados en Nanociencia, Madrid E-28049 (Spain); Camarero, Julio; Cuñado, Jose Luis F. [IMDEA Nanociencia, Instituto Madrileño de Estudios Avanzados en Nanociencia, Madrid E-28049 (Spain); Dpto. de Física de la Materia Condensada, Universidad Autónoma de Madrid, Madrid E-28049 (Spain); Nemes, Norbert M. [Dpto. de Física Aplicada III, Universidad Complutense de Madrid, Madrid E-28040 (Spain); Mompean, Federico J.; Garcia-Hernández, Mar [Instituto de Ciencia de Materiales de Madrid, CSIC, Madrid E-28049 (Spain); Nie, Shu; McCarty, Kevin F. [Sandia National Laboratories, Livermore, California 94550 (United States); N'Diaye, Alpha T.; Chen, Gong; Schmid, Andreas K. [Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

2013-12-14T23:59:59.000Z

116

Patterns of Service-Oriented Architecture  

E-Print Network (OSTI)

Patterns of Service-Oriented Architecture Uwe Zdun Email: zdun@infosys.tuwien.ac.at, zdun Architecture 1 #12;Agenda · Service-oriented architectures (SOA) · Patterns and pattern languages · Basic, Vienna University of Technology Patterns of Service-Oriented Architecture 2 #12;Service-oriented

Zdun, Uwe

117

MOOSE: Multiphysics Object-Oriented Simulation Environment  

SciTech Connect

An overview of Idaho National Laboratory's MOOSE: Multiphysics Object-Oriented Simulation Environment

Gaston, Derek

2014-04-09T23:59:59.000Z

118

MOOSE: Multiphysics Object-Oriented Simulation Environment  

ScienceCinema (OSTI)

An overview of Idaho National Laboratory's MOOSE: Multiphysics Object-Oriented Simulation Environment

Gaston, Derek

2014-05-30T23:59:59.000Z

119

Precision Magnet Measurements for X-Band Accelerator Quadrupole Triplets  

SciTech Connect

An X-band test station is being developed at LLNL to investigate accelerator optimization for future upgrades to mono-energetic gamma-ray (MEGa-Ray) technology at LLNL. Beamline magnets will include an emittance compensation solenoid, windowpane steering dipoles, and quadrupole magnets. Demanding tolerances have been placed on the alignment of these magnets, which directly affects the electron bunch beam quality. A magnet mapping system has been established at LLNL in order to ensure the delivered magnets match their field specification, and the mountings are aligned and capable of reaching the specified alignment tolerances. The magnet measurement system will be described which uses a 3-axis Lakeshore gauss probe mounted on a 3-axis translation stage. Alignment accuracy and precision will be discussed, as well as centering measurements and analysis. The dependence on data analysis over direct multi-pole measurement allows a significant improvement in useful alignment information. Detailed analysis of measurements on the beamline quadrupoles will be discussed, including multi-pole content both from alignment of the magnets, and the intrinsic level of multi-pole magnetic field.

Marsh, R A; Anderson, S G; Armstrong, J P

2012-05-16T23:59:59.000Z

120

Molecular orientation in soft matter thin films studied by resonant soft X-ray reflectivity  

SciTech Connect

We present a technique to study depth profiles of molecular orientation in soft matter thin films with nanometer resolution. The method is based on dichroism in resonant soft X-ray reflectivity using linear s- and p-polarization. It combines the chemical sensitivity of Near-Edge X-ray Absorption Fine Structure spectroscopy to specific molecular bonds and their orientation relative to the polarization of the incident beam with the precise depth profiling capability of X-ray reflectivity. We demonstrate these capabilities on side chain liquid crystalline polymer thin films with soft X-ray reflectivity data at the carbon K edge. Optical constants of the anisotropic refractive index ellipsoid were obtained from a quantitative analysis using the Berreman formalism. For films up to 50 nm thickness we find that the degree of orientation of the long axis exhibits no depth variation and isindependent of the film thickness.

Mezger, Markus; Jerome, Blandine; Kortright, Jeffrey B.; Valvidares, Manuel; Gullikson, Eric; Giglia, Angelo; Mahne, Nicola; Nannarone, Stefano

2011-01-12T23:59:59.000Z

Note: This page contains sample records for the topic "band axis orientation" 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

Design of a novel six-axis metrology system for meso-scale nanopositioners  

E-Print Network (OSTI)

The purpose of this research is to develop the best possible means and methods of building a six axis metrology system given cost and space constraints. Six axis measurements are a crucial part of precision engineering and ...

King, Ryan N. (Ryan Nicholas)

2009-01-01T23:59:59.000Z

122

E-Print Network 3.0 - atlas und axis Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

axis Search Powered by Explorit Topic List Advanced Search Sample search results for: atlas und axis Page: << < 1 2 3 4 5 > >> 1 Mitteilung fr die Medien Mitteilung fr die Medien...

123

BNL | S-band Linac  

NLE Websites -- All DOE Office Websites (Extended Search)

S-band Linac S-band Linac Some experiments at the ATF require higher energies than what is available from the photoinjector. We use two traveling wave linac structures, known as 'SLAC sections' (from the famous 2-mile SLAC linac). Each section provides an acceleration given by: Energy gain (in MeV) = 10.8*SQRT(Power in MW)-39.5*Current(in amps) The current to be used is an equivalent steady state current. The microwave drive power, at a frequency of 2856 MHz, is provided by a single XK5 klystron tube (the old SLAC klystron). This tube can provide up to 25 MW. The ATF modulator can provide the XK5 klystron with high voltage for about 3 microseconds. This 3 microsecond pulse is called the macropulse. The repetition rate for the macropulses is from 1 to 6 per second. Within each

124

A Multi-Axis Seam Tracking sensor for joining applications  

SciTech Connect

This paper describes the development and use of the Multi-Axis Seam Tracking (MAST) sensor for tracking seams or other features in real-time. Four independent, spatially-distributed electric fields are used to sense changes in the relative position of the sensor and the workpiece. The MAST sensor is very inexpensive compared with commercially available seam tracking sensors. It can be used in systems to perform cost-effective small-lot manufacturing operations in a faster, more consistent manner. The MAST sensor is used in an automated system for dispensing braze paste during a rocket nozzle fabrication process.

Novak, J.L.; Schmitt, D.J. [Sandia National Labs., Albuquerque, NM (United States); Maslakowski, J. [Rockwell International Corp., Canoga Park, CA (United States). Rocketdyne Div.

1993-11-01T23:59:59.000Z

125

Multi-Axis Seam Tracking using a noncontact capacitive sensor  

SciTech Connect

This paper describes the development and use of the Multi-Axis Seam racking (MAST) sensor for tracking seams or other features in real-time. Four independent, spatially-distributed electric fields are used to sense changes in the relative position of the sensor and the workpiece. The MAST sensor is very inexpensive compared with commercially available seam tracking sensors. It can be used in systems to perform cost-effective small-lot manufacturing operations in a faster, more consistent manner. The MAST sensor is used in an automated system for dispensing braze paste during a rocket nozzle fabrication process.

Novak, J.L.; Schmitt, D.J. [Sandia National Labs., Albuquerque, NM (United States); Maslakowski, J. [Rockwell International Corp., Canoga Park, CA (United States). Rocketdyne Div.

1993-08-01T23:59:59.000Z

126

Torque ripple in a Darrieus, vertical axis wind turbine  

SciTech Connect

Interaction between a steady wind and a rotating, Darrieus, vertical axis wind turbine produces time periodic aerodynamic loads which cause time dependent torque variations, referred to as torque ripple, to occur in the mechanical link between the turbine and the electrical generator. There is concern for the effect of torque ripple upon fatigue life of drive train components and upon power quality. An analytical solution characterizing the phenomenon of torque ripple has been obtained which is based upon a Fourier expansion of the time dependent features of the problem. Numerical results for torque ripple, some experimental data, determination of acceptable levels and methods of controlling it, are presented and discussed.

Reuter, R.C. Jr.

1980-09-01T23:59:59.000Z

127

Timescale stretch parameterization of Type Ia supernova B-band light curves  

SciTech Connect

R-band intensity measurements along the light curve of Type Ia supernovae discovered by the Cosmology Project (SCP) are fitted in brightness to templates allowing a free parameter the time-axis width factor w identically equal to s times (1+z). The data points are then individually aligned in the time-axis, normalized and K-corrected back to the rest frame, after which the nearly 1300 normalized intensity measurements are found to lie on a well-determined common rest-frame B-band curve which we call the ''composite curve.'' The same procedure is applied to 18 low-redshift Calan/Tololo SNe with Z < 0.11; these nearly 300 B-band photometry points are found to lie on the composite curve equally well. The SCP search technique produces several measurements before maximum light for each supernova. We demonstrate that the linear stretch factor, s, which parameterizes the light-curve timescale appears independent of z, and applies equally well to the declining and rising parts of the light curve. In fact, the B band template that best fits this composite curve fits the individual supernova photometry data when stretched by a factor s with chi 2/DoF {approx} 1, thus as well as any parameterization can, given the current data sets. The measurement of the data of explosion, however, is model dependent and not tightly constrained by the current data. We also demonstrate the 1 + z light-cure time-axis broadening expected from cosmological expansion. This argues strongly against alternative explanations, such as tired light, for the redshift of distant objects.

Goldhaber, G.; Groom, D.E.; Kim, A.; Aldering, G.; Astier, P.; Conley, A.; Deustua, S.E.; Ellis, R.; Fabbro, S.; Fruchter, A.S.; Goobar, A.; Hook, I.; Irwin, M.; Kim, M.; Knop, R.A.; Lidman, C.; McMahon, R.; Nugent, P.E.; Pain, R.; Panagia, N.; Pennypacker, C.R.; Perlmutter, S.; Ruiz-Lapuente, P.; Schaefer, B.; Walton, N.A.; York, T.

2001-04-01T23:59:59.000Z

128

Effect of Dynamic Stall on the Aerodynamics of Vertical-Axis Wind Turbines  

E-Print Network (OSTI)

Effect of Dynamic Stall on the Aerodynamics of Vertical-Axis Wind Turbines Frank Scheurich of the aerodynamic performance of vertical-axis wind turbines pose a significant challenge for computational fluid of the aerodynamics of a vertical- axis wind turbine that consists of three curved rotor blades that are twisted

McCalley, James D.

129

Experimental investigation of the performance of a diffuser-augmented vertical axis wind turbine  

E-Print Network (OSTI)

Experimental investigation of the performance of a diffuser- augmented vertical axis wind turbine Experimental investigation of the performance of a diffuser-augmented vertical axis wind turbine by Arash The performance of a vertical axis wind turbine with and without a diffuser was studied using direct force

Victoria, University of

130

Coriolis Effect on Dynamic Stall in a Vertical Axis Wind Turbine at Moderate Reynolds Number  

E-Print Network (OSTI)

axis wind turbines (VAWT) offer several advantages over horizontal axis wind turbines (HAWT), namely to yaw wind direction (because they are omnidirectional), and their increased power output in skewed flowCoriolis Effect on Dynamic Stall in a Vertical Axis Wind Turbine at Moderate Reynolds Number Hsieh

Colonius, Tim

131

proteinsSTRUCTURE O FUNCTION O BIOINFORMATICS Ligand preference and orientation in b-and  

E-Print Network (OSTI)

of New York, New York, New York 10031 INTRODUCTION The heme cofactor is ubiquitous and essential for life, Physics Department, City College of New York, 160 Convent Avenue, New York 10031. E-mail: christian of their ability to transfer absorbed light energy to oxygen, transforming it into singlet oxygen (for reviews see

Gunner, Marilyn

132

STUDENT AFFAIRS YEAR 1 ORIENTATION  

E-Print Network (OSTI)

STUDENT AFFAIRS YEAR 1 ORIENTATION Student Affairs Team #12;Objectives: ·Introductions ·Services Offered ·Policies ·Student Disability Services #12;Student Affairs Team: · Assistant Dean of Student/Events Guru: Allison Gherardini · Student Organizations: Tracey Eady · Glue: Benita Patrick, Jean Mc

Finley Jr., Russell L.

133

Nonnegative Diffusion Orientation Distribution Function  

Science Journals Connector (OSTI)

Because of the well-known limitations of diffusion tensor imaging (DTI) in regions of low anisotropy and multiple fiber crossing, high angular resolution diffusion imaging (HARDI) and Q-Ball Imaging (QBI) are used to estimate the probability density ... Keywords: High angular resolution diffusion imaging (HARDI), Higher order diffusion tensor, Nonnegativity, Orientation distribution function (ODF), Principal direction

Liqun Qi; Gaohang Yu; Yi Xu

2013-02-01T23:59:59.000Z

134

RF generation in the DARHT Axis-II beam dump  

SciTech Connect

We have occasionally observed radio-frequency (RF) electromagnetic signals in the downstream transport (DST) of the second axis linear induction accelerator (LIA) at the dual-axis radiographic hydrodynamic testing (DARHT) facility. We have identified and eliminated some of the sources by eliminating the offending cavities. However, we still observe strong RF in the range 1 GHz t0 2 GHz occurring late in the {approx}2-{micro}s pulse that can be excited or prevented by varying the downstream tune. The narrow frequency width (<0.5%) and near exponential growth at the dominant frequency is indicative of a beam-cavity interaction, and electro-magnetic simulations of cavity structure show a spectrum rich in resonances in the observed frequency range. However, the source of beam produced RF in the cavity resonance frequency range has not been identified, and it has been the subject of much speculation, ranging from beam-plasma or beam-ion instabilities to unstable cavity coupling.

Ekdahl, Carl A. Jr. [Los Alamos National Laboratory

2012-05-03T23:59:59.000Z

135

Red Band Needle Blight TERMS OF REFERENCE  

E-Print Network (OSTI)

Red Band Needle Blight TERMS OF REFERENCE Purpose 1. The Programme Board has been formed to have an overview of the administration and science of Red Band Needle Blight (RBNB), to underpin decisions made

136

Vibration-Rotation Bands of Trideuteromethyl Iodide  

Science Journals Connector (OSTI)

5 October 1965 research-article Vibration-Rotation Bands of Trideuteromethyl...of six parallel and nine perpendicular vibration bands of trideuteromethyl iodide has...constants for the fundamental degenerate vibrations. The values for overtone and combination...

1965-01-01T23:59:59.000Z

137

crown/forehead patch appeared black but reflected a dull red when the light was just right. No color markings or Fish and Wildlife Service bands  

E-Print Network (OSTI)

. No color markings or Fish and Wildlife Service bands were visible. The birds stood on a line facing into and parallel to the axis of an ESE wind blowing at about 25 mph. Three birds were resting with their heads and necks on their backs or under their wings. The largest bird faced directly into the wind in front

138

Superdeformed bands in sup 194 Tl  

SciTech Connect

Superdeformation was first observed in the mass-190 region in {sup 191}Hg. Since then, SD bands have been found in {sup 190-194}Hg nuclei. Here we report the discovery of two such bands in {sup 194}Tl which are the first SD bands fond in this mass region that are not in Hg nuclei. Subsequently, bands have been found in two Pb nuclei. 5 refs., 1 fig.

Azaiez, F.; Kelly, W.H.; Korten, W.; Deleplanque, M.A.; Stephens, F.S.; Diamond, R.M.; Beausang, C.W.; Draper, J.E.; Rubel, E. (Lawrence Berkeley Lab., CA (USA)); Becker, J.A.; Henry, E.A.; Brinkman, M.J.; Yates, S.W.; Kuhnert, A. (Lawrence Livermore National Lab., CA (USA))

1990-05-01T23:59:59.000Z

139

UT-TRIBE-NORTHWESTERN BAND OF SHOSHONE  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

U.S. Department of Energy Categorical Exclusion Determination Form Program or Field Office: Energy Efficiency and Conservation Block Grant Program Project Title UT-TRIBE-NORTHWESTERN BAND OF SHOSHONE Location: Tribe UT-TRIBE- NORTHWESTERN BAND OF SHOSHONE UT American Recovery and Reinvestment Act: Proposed Action or Project Description The Northwestern Band of Shoshone Nation of Utah proposes to perform energy efficiency improvements

140

Low band gap polymers Organic Photovoltaics  

E-Print Network (OSTI)

Low band gap polymers for Organic Photovoltaics Eva Bundgaard Ph.D. Dissertation Risø National Bundgaard Title: Low band gap polymers for Organic photovoltaics Department: The polymer department Report the area of organic photovoltaics are focusing on low band gap polymers, a type of polymer which absorbs

Note: This page contains sample records for the topic "band axis orientation" 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

Dual axis translation apparatus and system for translating an optical beam and related method  

DOE Patents (OSTI)

A dual axis translation device and system in accordance with this invention, for translating an optical beam along both an x-axis and a y-axis which are perpendicular to one another, has a beam directing means acting on said optical beam for directing the beam along a particular path transverse to said x and y axes. An arrangement supporting said beam directing means for movement in the x and y direction within a given plane is provided. The arrangement includes a first means for translating said beam directing means along the x-axis in said given plane in order to translate the beam along said x-axis. The arrangement comprises a second means for translating said beam directing means along the y-axis in said given plane in order to translate the beam along said y-axis.

Cassidy, Kelly (Manteca, CA)

1991-01-01T23:59:59.000Z

142

Preferred orientation of n-hexane crystallized in silicon nanochannels: A combined x-ray diffraction and sorption isotherm study  

E-Print Network (OSTI)

We present an x-ray diffraction study on n-hexane in tubular silicon channels of approximately 10 nm diameter both as a function of the filling fraction f of the channels and as a function of temperature. Upon cooling, confined n-hexane crystallizes in a triclinic phase typical of the bulk crystalline state. However, the anisotropic spatial confinement leads to a preferred orientation of the confined crystallites, where the crystallographic direction coincides with the long axis of the channels. The magnitude of this preferred orientation increases with the filling fraction, which corroborates the assumption of a Bridgman-type crystallization process being responsible for the peculiar crystalline texture. This growth process predicts for a channel-like confinement an alignment of the fastest crystallization direction parallel to the long channel axis. It is expected to be increasingly effective with the length of solidifying liquid parcels and thus with increasing f. In fact, the fastest solidification front...

Henschel, Anke; Hofmann, Tommy; Knorr, Klaus; Huber, Patrick; 10.1103/PhysRevE.79.032601

2009-01-01T23:59:59.000Z

143

Mathematics and Engineering Mathematics & Engineering Orientation  

E-Print Network (OSTI)

Mathematics and Engineering Mathematics & Engineering Orientation Evening Thursday, January 20, 2011 WELCOME! #12;Mathematics and Engineering Mathematics& EngineeringOrientationProgram Thursday,January20, 2011 1. Program Presentation · Welcome · What is Mathematics & Engineering ? · Why Mathematics

Linder, Tamás

144

Scattering Properties of Oriented Hexagonal Ice Crystals  

E-Print Network (OSTI)

To interpret the data from spaceborn lidar measurements, one must have a basic understanding of the backscattering of oriented ice particles. The conventional raytracing method is not applicable to the scattering of light by oriented particles...

Zhang, Feng

2010-01-14T23:59:59.000Z

145

Dynamic stall occurrence on a horizontal axis wind turbine blade  

SciTech Connect

Surface pressure data from the National Renewable Energy Laboratory`s ``Combined Experiment`` were analyzed to provide a statistical representation of dynamic stall occurrence on a downwind horizontal axis wind turbine (HAWT). Over twenty thousand blade rotational cycles were each characterized at four span locations by the maximum leading edge suction pressure and by the azimuth, velocity, and yaw at which it occurred. Peak suction values at least twice that seen in static wind tunnel tests were taken to be indicative of dynamic stall. The occurrence of dynamic stall at all but the inboard station (30% span) shows good quantitative agreement with the theoretical limits on inflow velocity and yaw that should yield dynamic stall. Two hypotheses were developed to explain the discrepancy at 30% span. Estimates are also given for the frequency of dynamic stall occurrence on upwind turbines. Operational regimes were identified which minimize the occurrence of dynamic stall events.

Shipley, D.E.; Miller, M.S.; Robinson, M.C. [Colorado Univ., Boulder, CO (United States). Dept. of Aerospace Engineering Sciences

1995-07-01T23:59:59.000Z

146

Dual-axis resonance testing of wind turbine blades  

DOE Patents (OSTI)

An apparatus (100) for fatigue testing test articles (104) including wind turbine blades. The apparatus (100) includes a test stand (110) that rigidly supports an end (106) of the test article (104). An actuator assembly (120) is attached to the test article (104) and is adapted for substantially concurrently imparting first and second forcing functions in first and second directions on the test article (104), with the first and second directions being perpendicular to a longitudinal axis. A controller (130) transmits first and second sets of displacement signals (160, 164) to the actuator assembly (120) at two resonant frequencies of the test system (104). The displacement signals (160, 164) initiate the actuator assembly (120) to impart the forcing loads to concurrently oscillate the test article (104) in the first and second directions. With turbine blades, the blades (104) are resonant tested concurrently for fatigue in the flapwise and edgewise directions.

Hughes, Scott; Musial, Walter; White, Darris

2014-01-07T23:59:59.000Z

147

Red Band Needle Blight Programme Red Band Needle Blight of Pine Programme Group  

E-Print Network (OSTI)

Red Band Needle Blight Programme Group Red Band Needle Blight of Pine Programme Group Minutes Support Welcome and introduction 1. Jim thanked everyone for attending the first meeting of the Red Band and that the private 1 | Paper 1 - Minutes | Debbie Erskine | 23/01/2009 #12;Red Band Needle Blight Programme Group

148

Metallic-nanoparticle assisted enhanced band-to-band tunneling current Deblina Sarkara)  

E-Print Network (OSTI)

Metallic-nanoparticle assisted enhanced band-to-band tunneling current Deblina Sarkara) and Kaustav) Metallic nanoparticle assisted band-to-band tunneling is proposed, and the impact of such nanoparticle that an asymmetric pinning is required to leverage maximum benefits from the insertion of metallic nanoparticles. VC

149

IR Spectrometer Using 90-degree Off-axis Parabolic Mirrors  

SciTech Connect

A gated spectrometer has been designed for real-time, pulsed infrared (IR) studies at the National Synchrotron Light ource at the Brookhaven National Laboratory. A pair of 90-degree, off-axis parabolic mirrors are used to relay the light from an entrance slit to an output IR recording camera. With an initial wavelength range of 1500–4500 nm required, gratings could not be used in the spectrometer because grating orders would overlap. A magnesium oxide prism, placed between these parabolic mirrors, serves as the dispersion element. The spectrometer is doubly telecentric. With proper choice of the air spacing between the prism and the second parabolic mirror, any spectral region of interest within the InSb camera array’s sensitivity region can be recorded. The wavelengths leaving the second parabolic mirror are collimated, thereby relaxing the camera positioning tolerance. To set up the instrument, two different wavelength (visible) lasers are introduced at the entrance slit and made collinear with the optical axis via flip mirrors. After dispersion by the prism, these two laser beams are directed to tick marks located on the outside housing of the gated IR camera. This provides first-order wavelength calibration for the instrument. Light that is reflected off the front prism face is coupled into a high-speed detector to verify steady radiance during the gated spectral imaging. Alignment features include tick marks on the prism and parabolic mirrors. This instrument was designed to complement singlepoint pyrometry, which provides continuous time histories of a small collection of spots from shock-heated targets.

Robert M. Malone, Richard, G. Hacking, Ian J. McKenna, and Daniel H. Dolan

2008-09-02T23:59:59.000Z

150

DOE Challenge Home: Orientation Training – October 2012  

Energy.gov (U.S. Department of Energy (DOE))

A publication of the U.S. Department of Energy Challenge Home program: Orientation Training – October 2012.

151

Composing crosscutting concerns : a service-oriented view  

E-Print Network (OSTI)

in the field of service-oriented architecture. More work isWhile service-oriented architectures (SOAs) have beendomain leverages service-oriented architectures (SOAs). SOAs

Menarini, Massimiliano; Menarini, Massimiliano

2012-01-01T23:59:59.000Z

152

A Framework for Real-Time Service-Oriented Architecture  

E-Print Network (OSTI)

and reasoning in service-oriented architectures,” Journal offor Real-Time Service-Oriented Architecture Mark Panahi,Abstract—Service-oriented architectures (SOA), though widely

Panahi, Mark; Nie, Weiran; Lin, Kwei-Jay

2009-01-01T23:59:59.000Z

153

Transportation Security SensorNet: A Service Oriented Architecture  

E-Print Network (OSTI)

Transportation Security SensorNet: A Service Oriented Architecture for Cargo Monitoring Martin..................................................................................................................2 C. Service Oriented Architecture .................................................................4 B. Adobe - Service Oriented Architecture

Kansas, University of

154

Open Location-Oriented Services for the Web  

E-Print Network (OSTI)

point of a Service Oriented Architecture (SOA). Technically,the Web Service Oriented Architecture (SOA) ArchitecturalLocation-Oriented Services for the Web architecture based on

Wilde, Erik

2008-01-01T23:59:59.000Z

155

Service Oriented Architecture Introduction and Research Issues  

E-Print Network (OSTI)

Service Oriented Architecture Introduction and Research Issues 2008.07.16 In-Gwon Song KAIST SE LAB 2008 #12;Contents Introduction Understanding service oriented architecture(SOA) Definitions Trends Oriented Architecture(SOA) Service Service Service RegistryDiscover Register A system built with SOA 3

Bae, Doo-Hwan

156

SEMANTIC LOOKUP IN SERVICE-ORIENTED ARCHITECTURES  

E-Print Network (OSTI)

SEMANTIC LOOKUP IN SERVICE-ORIENTED ARCHITECTURES UWE ZDUN Department of Information Systems in many distributed systems. This paper deals with lookup in service-oriented architectures, such as Web services, P2P systems, GRIDs, or spontaneous networks. Service-oriented architectures impose specific

Zdun, Uwe

157

Guest Editorial: ObjectOriented Simulation  

E-Print Network (OSTI)

Guest Editorial: Object�Oriented Simulation: Aspects of the Model Development Lifecycle John A Issue is the use of object�oriented concepts throughout the li� fecycle of software/model development of the object�oriented paradigm is to be fully realized in simulation. The papers in this Special Issue make

Miller, John A.

158

Patterns for Process-Oriented Integration in Service-Oriented Architectures  

E-Print Network (OSTI)

Patterns for Process-Oriented Integration in Service-Oriented Architectures Carsten Hentrich CSC/184-1 A-1040 Vienna, Austria e-Mail: zdun@acm.org Service-oriented architectures are increasingly used the scope of this architectural pattern. Introduction Service-oriented architectures (SOA

Zdun, Uwe

159

Differential Regulation of Cellulose Orientation at the Inner and Outer Face of Epidermal Cells in the Arabidopsis Hypocotyl  

Science Journals Connector (OSTI)

...will regulate the growth rate of the organ independently of...was collected using a band-pass 488/25 filter (Semrock...orientations was performed using the Physics Analysis Workstation (PAW...wall texture, and growth rate in intact roots of Arabidopsis...

Elizabeth Faris Crowell; Hélène Timpano; Thierry Desprez; Tiny Franssen-Verheijen; Anne-Mie Emons; Herman Höfte; Samantha Vernhettes

2011-07-08T23:59:59.000Z

160

Raindrop axis ratios, fall velocities and size distribution over Sumatra from 2D-Video Disdrometer measurement  

Science Journals Connector (OSTI)

Raindrop axis ratio, falling velocity and size distribution are important in broad list of applications. However, they are not frequently observed in the equatorial region. This paper elucidated the characteristics of raindrop axis ratio, falling velocity and size distribution based on 2D-Video Disdrometer (2DVD) data that have been collected in the equatorial Indonesia, particularly at Kototabang (hereafter called KT), west Sumatra, Indonesia (0.20°S, 100.32°E, 864 m above sea level). A comprehensive follow-up of the previous study on the natural variability of raindrop size distributions (DSDs) is presented. Precipitation was classified through 1.3-GHz wind profiler observation. The dependence of raindrop falling velocity and axis ratio on rainfall type was not clearly observed. Overall, measured raindrop fall velocities were in good agreement with Gunn–Kinzer's data. Raindrop axis ratio at KT was more spherical than that of artificial rain and equilibrium model, and close to the values reported in the turbulent high shear zone of surface layer which can be partially due to the effect of the instrument errors (e.g., location and container shape). Of some natural variations of DSD investigated, the dependence of DSD on rainfall rate and rainfall type as well as diurnal variation was clearly visible. A striking contrast between the stratiform and convective rains is that the size distributions from the stratiform (convective) rains tend to narrow (broaden) with increasing rainfall rates. For rainfall rate R < 10 mm/h, the size distribution of stratiform was broader than that of convective. On the other hand, at higher rainfall rate more large-sized drops were found in convective rain. During the convective rain, very large-sized drops were found mainly at the very start of rain event while for the stratiform they were found to be associated with a strong bright band. In diurnal basis, the \\{DSDs\\} in the morning hours were narrower than those in the evening which was indicated by smaller Dm values in the morning hours than their counterparts in the evening. Rainfall type dependence and diurnal variation of DSD lead to significant variation of Z–R relations so that they must be considered to increase the accuracy of Z–R conversion from weather radar in this region. Consistent with the previous study, lack of seasonal DSD variability was also found in this work that would be due to significant local convective and orographic effect at this region throughout the year. However, Dm values in our result were larger than the typical orographic DSD.

Marzuki; Walter L. Randeu; Toshiaki Kozu; Toyoshi Shimomai; Hiroyuki Hashiguchi; Michael Schönhuber

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "band axis orientation" 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

Oriented niobate ferroelectric thin films for electrical and optical devices and method of making such films  

DOE Patents (OSTI)

Sr{sub x}Ba{sub 1{minus}x}Nb{sub 2}O{sub 6}, where x is greater than 0.25 and less than 0.75, and KNbO{sub 3} ferroelectric thin films metalorganic chemical vapor deposited on amorphous or crystalline substrate surfaces to provide a crystal axis of the film exhibiting a high dielectric susceptibility, electro-optic coefficient, and/or nonlinear optic coefficient oriented preferentially in a direction relative to a crystalline or amorphous substrate surface are disclosed. Such films can be used in electronic, electro-optic, and frequency doubling components. 8 figs.

Wessels, B.W.; Nystrom, M.J.

1998-05-19T23:59:59.000Z

162

Oriented niobate ferroelectric thin films for electrical and optical devices and method of making such films  

DOE Patents (OSTI)

Sr.sub.x Ba.sub.1-x Nb.sub.2 O.sub.6, where x is greater than 0.25 and less than 0.75, and KNbO.sub.3 ferroelectric thin films metalorganic chemical vapor deposited on amorphous or crystalline substrate surfaces to provide a crystal axis of the film exhibiting a high dielectric susceptibility, electro-optic coefficient, and/or nonlinear optic coefficient oriented preferentially in a direction relative to a crystalline or amorphous substrate surface. Such films can be used in electronic, electro-optic, and frequency doubling components.

Wessels, Bruce W. (Wilmette, IL); Nystrom, Michael J. (Germantown, MD)

1998-01-01T23:59:59.000Z

163

Nuclear Band Structure in Sc41  

Science Journals Connector (OSTI)

Band structure predictions assuming the formation of proton single-particle states above the Ca40 core in the ground state or one of its excited states are compared with the available data on the elastic and inelastic scattering of protons from Ca40. The band expected above the 3.35-Mev state in Ca40 is confirmed by experimental results, and some evidence is found for bands above the higher core states.

R. H. Davis

1959-09-15T23:59:59.000Z

164

X-BAND KLYSTRON DEVELOPMENT AT SLAC  

SciTech Connect

The development of X-band klystrons at SLAC originated with the idea of building an X-band Linear Collider in the late 1980's. Since then much effort has been expended in developing a reliable X-band Power source capable of delivering >50 MW RF power in pulse widths >1.5 {micro}s. I will report on some of the technical issues and design strategies which have led to the current SLAC klystron designs.

Vlieks, Arnold E.; /SLAC

2009-08-03T23:59:59.000Z

165

Control system for a vertical-axis windmill  

DOE Patents (OSTI)

A vertical-axis windmill having a rotating structure is provided with a series of articulated vertical blades whose positions are controlled to maintain a constant RPM for the rotating structure, when wind speed is sufficient. A microprocessor controller is used to process information on wind speed, wind direction and RPM of the rotating structure to develop an electrical signal for establishing blade position. The preferred embodiment of the invention, when connected to a utility grid, is designed to generate 40 kilowatts of power when exposed to a 20 mile per hour wind. The control system for the windmill includes electrical blade actuators that modulate the blades of the rotating structure. Blade modulation controls the blade angle of attack, which in turn controls the RPM of the rotor. In the preferred embodiment, the microprocessor controller provides the operation logic and control functions. A wind speed sensor provides inputs to start or stop the windmill, and a wind direction sensor is used to keep the blade flip region at 90 and 270/sup 0/ to the wind. The control system is designed to maintain constant rotor RPM when wind speed is between 10 and 40 miles per hour.

Brulle, R.V.

1981-09-03T23:59:59.000Z

166

Work-piece alignment for a hybrid multi-axis laser-aided manufacturing system .  

E-Print Network (OSTI)

??"The Laser Aided Manufacturing Process (LAMP) is a multi-axis hybrid manufacturing process comprised of both an additive process, laser deposition, and a subtractive process, CNC… (more)

Panackal, Ajay

2006-01-01T23:59:59.000Z

167

Simulation and modeling of flow field around a horizontal axis wind turbine (HAWT) using RANS method.  

E-Print Network (OSTI)

??The principal objective of the proposed CFD analysis is to investigate the flow field around a horizontal axis wind turbine rotor and calculate the turbine's… (more)

Sargsyan, Armen.

2010-01-01T23:59:59.000Z

168

Broad-band beam buncher  

DOE Patents (OSTI)

A broad-band beam bunther is disclosed, comprising an evacuated housing, an electron gun therein for producing an electron beam, a buncher cavity having entrance and exit openings through which the beam is directed, grids across such openings, a source providing a positive DC voltage between the cavity and the electron gun, a drift tube through which the electron beam travels in passing through such cavity, grids across the ends of such drift tube, gaps being provided between the drift tube grids and the entrance and exit grids, a modulator for supplying an ultrahigh frequency modulating signal to the drift tube for producing velocity modulation of the electrons in the beam, a drift space in the housing through which the velocity modulated electron beam travels and in which the beam is bunched, and a discharge opening from such drift tube and having a grid across such opening through which the bunched electron beam is discharged into an accelerator or the like. The buncher cavity and the drift tube may be arranged to constitute an extension of a coaxial transmission line which is employed to deliver the modulating signal from a signal source. The extended transmission line may be terminated in its characteristic impedance to afford a broad-

Goldberg, D.A.; Flood, W.S.; Arthur, A.A.; Voelker, F.

1984-03-20T23:59:59.000Z

169

K=0 Rotational Bands in Yb174  

Science Journals Connector (OSTI)

The ? deexcitation of three excited K=0 rotational bands has been studied following population in the Yb173(n,?) reaction at resonant neutron energies of 4.53 and 17.7 eV. The ? rays were detected in singles and coincidence with Ge(Li) detectors. Analysis was also made of the primary radiation. The decay properties of these bands exhibit strong deviations from the Alaga ratios. For the lowest excited K=0 band the deexcitation branching ratios resemble those in the even-even Sm, Gd, Yb, and W nuclei. The higher-lying K=0 bands in Yb174 decay similarly to those in Yb172 but considerably differently from the lowest K=0 bands in this region. The pairing-vibrational character of the K=0 bands in Yb174, as shown by (p,t) and (t,p) reaction studies, apparently does not greatly alter the relative decay rates for these states. Two-band mixing of each K=0 band with the ground band cannot explain all the observed results, nor can three-band mixing involving the ? vibration. The presence of M1 components in the I?I transitions could explain some of the anomalous branching ratios but cannot be a complete explanation. It is suggested that multiband mixing including the excited K=0 bands themselves may have to be considered. The two-neutron-transfer-reaction data can also be interpreted in terms of such mixing. The observed similarities between Yb174 and other nuclei in this region suggest a corresponding similarity of mixing effects.

R. F. Casten; D. Breitig; W. R. Kane; S. F. Mughabghab

1973-09-01T23:59:59.000Z

170

Possible quasimolecular bands in /sup 32/S  

SciTech Connect

Below the /sup 16/O+ /sup 16/O threshold, positive- and negative-parity bands at E/sub x/ = 11--17 MeV in /sup 32/S are identified, whose moments of inertia and ..cap alpha..-reduced widths indicate possible quasimolecular bands of /sup 16/O+ /sup 16/O and of some asymmetric configuration.

Morita, K.; Kubono, S.; Tanaka, M.H.; Utsunomiya, H.; Sugitani, M.; Kato, S.; Schimizu, J.; Tachikawa, T.; Takahashi, N.

1985-07-08T23:59:59.000Z

171

A V-BAND MMIC OSCILLATOR ARRAY USING WIDE BAND MICROSTRIP PATCH ANTENNA  

E-Print Network (OSTI)

A V-BAND MMIC OSCILLATOR ARRAY USING WIDE BAND MICROSTRIP PATCH ANTENNA HONG-TUEK KIM, WOOYEOL CHOI in a push-pull mode was implemented using two 2-port patch antennas. When measured in a closed over]. In this paper, to improve this problem, we develop a modified wide band microstrip patch antenna and use

Kwon, Youngwoo

172

Narrow band gap amorphous silicon semiconductors  

DOE Patents (OSTI)

Disclosed is a narrow band gap amorphous silicon semiconductor comprising an alloy of amorphous silicon and a band gap narrowing element selected from the group consisting of Sn, Ge, and Pb, with an electron donor dopant selected from the group consisting of P, As, Sb, Bi and N. The process for producing the narrow band gap amorphous silicon semiconductor comprises the steps of forming an alloy comprising amorphous silicon and at least one of the aforesaid band gap narrowing elements in amount sufficient to narrow the band gap of the silicon semiconductor alloy below that of amorphous silicon, and also utilizing sufficient amounts of the aforesaid electron donor dopant to maintain the amorphous silicon alloy as an n-type semiconductor.

Madan, A.; Mahan, A.H.

1985-01-10T23:59:59.000Z

173

WIND-TUNNEL STUDY ON AERODYNAMIC PERFORMANCE OF SMALL VERTICAL-AXIS WIND TURBINES  

E-Print Network (OSTI)

1 WIND-TUNNEL STUDY ON AERODYNAMIC PERFORMANCE OF SMALL VERTICAL-AXIS WIND TURBINES J. J. Miau*1 were carried out to study the aerodynamic performance of three vertical axis wind turbines (VAWTs. On the other hand, the characteristics of unsteady flow around the helical wind turbine were studied with a hot

Leu, Tzong-Shyng "Jeremy"

174

Manufacturing Equipment Modeling For a linear axis actuated by an electric motor complete the following  

E-Print Network (OSTI)

Manufacturing Equipment Modeling QUESTION 1 For a linear axis actuated by an electric motor(t). Include the axis disturbance force, but do not include motor electrical dynamics or Coulomb friction For a spindle actuated by an electric motor complete the following: a. Derive a differential equation

Landers, Robert G.

175

Dynamic behavior analysis for a six axis industrial machining BISU Claudiu1,a  

E-Print Network (OSTI)

Dynamic behavior analysis for a six axis industrial machining robot BISU Claudiu1,a , CHERIF Mehdi2-yves.knevez@u-bordeaux1.fr Abstract The six axis robots are widely used in automotive industry for their good repeatability (as defined in the ISO92983) (painting, welding, mastic deposition, handling etc

Paris-Sud XI, Université de

176

Two Oppositely Localised Frizzled RNAs as Axis Determinants in a Cnidarian Embryo  

E-Print Network (OSTI)

ascidian and sea urchin embryos, promoting endoderm/mesoderm fates, and in domains offset from the vegetalTwo Oppositely Localised Frizzled RNAs as Axis Determinants in a Cnidarian Embryo Tsuyoshi Momose) Two oppositely localised Frizzled RNAs as axis determinants in a cnidarian embryo. PLoS Biol 5(4): e70

Villefranche sur mer

177

Near wake properties of horizontal axis marine current L. Myers and A.S. Bahaj  

E-Print Network (OSTI)

1 Near wake properties of horizontal axis marine current turbines L. Myers and A.S. Bahaj wake region of a tidal current turbine is strongly driven by the combined wake of the device support-scale horizontal axis turbine has been have been measured in a large water channel facility. A downstream map

Quartly, Graham

178

Comparison of Different Approaches for the Calculation of Projective Symmetry or the Axis of a SHGC  

E-Print Network (OSTI)

Comparison of Different Approaches for the Calculation of Projective Symmetry or the Axis of a SHGC;Comparison of Different Approaches for the Calculation of Projective Symmetry or the Axis of a SHGC Sven]. And although the projections of straight homogeneous generalised cylinders (SHGC) generally exhibit no symmetry

Hamburg,.Universität

179

CYCLOTRON HEATING NFR THE MULTIPOLE B = 0 AXIS J. C. Sprott  

E-Print Network (OSTI)

CYCLOTRON HEATING NFR THE MULTIPOLE B = 0 AXIS by J. C. Sprott November 1973 PLP 536 Plasma Studies of the author and major professor. #12;Ion and Electron Cyclotron heating rates in multipoles are generally = 0 axis in a multipole. The average cyclotron heating rate is given by d--= dt where TIB G 0 = TI

Sprott, Julien Clinton

180

Intrinsic security in SORCER (Service Oriented) grid.  

E-Print Network (OSTI)

??A grid is a vast repository of virtual services. SORCER is a computational grid environment based on the Service Oriented Paradigm. Security and trust, in… (more)

Rai, Abhijit

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "band axis orientation" 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

Intrinsic security in SORCER (service oriented) grid.  

E-Print Network (OSTI)

??A grid is a vast repository of virtual services. SORCER is a computational grid environment based on the Service Oriented Paradigm. Security and trust, in… (more)

Rai, Abhijit

2005-01-01T23:59:59.000Z

182

Preferred orientation of ettringite in concrete fractures  

E-Print Network (OSTI)

preferred orientation of ettringite. Equal area projection.stiffness for trigonal ettringite single crystal in crystalthe stiffness for an ettringite single crystal with that for

Wenk, Hans-Rudolf

2009-01-01T23:59:59.000Z

183

Biaxially Oriented Film on Flexible Polymeric Substrate  

NLE Websites -- All DOE Office Websites (Extended Search)

Oriented Film on Flexible Polymeric Substrate A semiconducting structure having a glass substrate. Available for thumbnail of Feynman Center (505) 665-9090 Email Biaxially...

184

Preparation and orientation of solid  

Science Journals Connector (OSTI)

We have prepared solid 3He crystals under constant volume conditions and characterized them by neutron diffraction and transmission. The ultimate aim of the work was the preparation of samples suitable for neutron diffraction investigations of the antiferromagnetic nuclear ordering of solid 3He below 1 mK. We describe results from different sample cells, and we have derived the relevant design parameters with respect to (a) the neutron signal and background requirements, (b) the requirements of experiments at ultra-low temperature and (c) the mechanical properties for work at high pressure. The techniques of the 3He crystal growth at pressure between 4 and 6 MPa and at low temperature are described, together with a strategy for the crystal orientation and background reduction. As a result, large 3He single crystals of good quality were obtained. With such samples, neutron experiments on magnetic order in solid 3He at ultra-low temperature shift to the experimentally feasible regime.

V Boiko; S Matas; K Siemensmeyer

2008-01-01T23:59:59.000Z

185

Nuclear Orientation of Pm143  

Science Journals Connector (OSTI)

Promethium-143 has been oriented in a crystal of neodymium ethylsulfate. The angular distribution of the 740-kev ? ray was found to be W(?)=1-(0.065±0.006)P2(cos?) at 0.02°K. Values for the mixing ratio, ?, of the 740-kev ? ray of Nd143 were obtained as a function of the magnetic moment of the ground state of Pm143. The spin of the excited state of Nd143 was assigned as 92-. An absolute lower limit of |?|>1.0 was set on the magnetic moment of Pm143. The mixing ratio of the ? ray of Nd143 was found to lie in the range 0.23

C. A. Lovejoy, J. O. Rasmussen, and D. A. Shirley

1961-08-01T23:59:59.000Z

186

Grain orientations and distribution of  

Science Journals Connector (OSTI)

The local grain orientations and the distribution of Y2Ba4CuUOx (U-2411) phase are measured within melt-textured YBCO samples by means of electron backscatter diffraction (EBSD). In this work, several samples with varying addition (0.1–0.8 wt%) of depleted uranium oxide (DU) were analysed by means of EBSD. The embedded U-2411 particles were found to have sizes around 200 nm, some large particles being present in the samples with a high DU concentration. Combined EBSD and EDX analysis enabled the identification of the Kikuchi patterns of the U-2411 phase, so that a true three-phase EBSD scan (YBCO, Y2BaCuO5 and U-2411) becomes possible.

A Koblischka-Veneva; F Mücklich; M R Koblischka; N Hari Babu; D A Cardwell; M Murakami

2006-01-01T23:59:59.000Z

187

CTAX: the US/Japan Cold Neutron Triple-Axis Spectromete at HFIR | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

CTAX-US/Japan Cold Neutron Triple-Axis Spectrometer CTAX-US/Japan Cold Neutron Triple-Axis Spectrometer CTAX US/Japan Cold Neutron Triple-Axis Spectrometer (CG-4C). (larger image) The U.S.-Japan Cold Neutron Triple-Axis Spectrometer (CTAX) is a conventional triple-axis spectrometer with variable incident energy and variable monochromator-sample and sample-analyzer distances. The cold guide 4 bender and guide hall shielding reduce background levels at CG-4C, and the 15-cm-tall guide profile is well exploited by CG-4C's vertically focusing monochromator (PG 002). To enhance accommodation of strong magnetic fields at the sample position and to simplify future polarization analysis, the amount of ferromagnetic material has been minimized in the construction of this instrument. CG-4C is a collaboration of Oak Ridge National Laboratory, the Neutron

188

Raman spectra of oriented and non-oriented Cu hydroxy-phosphate minerals: Libethenite, cornetite, pseudomalachite, reichenbachite and ludjibaite  

Science Journals Connector (OSTI)

Abstract Oriented cornetite [Cu3PO4(OH)3], libethenite [Cu2PO4(OH)] and pseudomalachite [Cu5(PO4)2(OH)4] and non-oriented reichenbachite [Cu5(PO4)2(OH)4] and ludjibaite [Cu5(PO4)2(OH)4] minerals from ?ubietová and Špania Dolina dump fields, Banská Bystrica, Slovakia were examined by polarized Raman spectroscopy. The examined minerals display the characteristic vibrational modes of PO4 and OH groups and further lattice modes. The PO4 stretching and bending vibrations of the investigated minerals occur between 1150 and 900 cm?1 and between 700 and 350 cm?1, respectively. On the other hand, the hydroxyl group stretching and bending modes appear above 3350 cm?1 and between 900 and 700 cm?1, respectively. The lattice vibrations occur below 350 cm?1. The different bond distances of the PO4 groups readily explain the shift of the bands to higher or lower wavenumbers among the studied Cu hydroxy-phosphate minerals.

Sherif Kharbish; Peter Andráš; Jarmila Luptáková; Stanislava Milovská

2014-01-01T23:59:59.000Z

189

Orientation and relaxation of orientation of amorphous poly(ethylene terephthalate)  

E-Print Network (OSTI)

Orientation and relaxation of orientation of amorphous poly(ethylene terephthalate) A. Karim 25 April 2001 Abstract Poly(ethylene terephthalate) (PET) has been uniaxially stretched at different by Elsevier Science Ltd. Keywords: Poly(ethylene terephthalate); Orientation; Relaxation 1. Introduction

Pezolet, Michel

190

New Employee Orientation | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Orientation Orientation New Employee Orientation Welcome to the Department of Energy's (DOE) orientation website. As a newly appointed Federal and/or DOE employee, you are required to attend a one day New Employee Orientation (NEO) session on the first day that you report to work. There are several mandatory forms that you will need to complete and bring with you. This site enables you to access all the mandatory forms. Please complete the forms and bring them with you to your NEO session. This site also provides information on benefits you may be eligible to receive. If you are not certain as to whether you are eligible to receive a particular benefit, please contact your servicing Human Resources Specialist. Their contact information can be found in your final offer

191

Oriented perforations -- A rock mechanics view  

SciTech Connect

Hydraulic fracture initiation dictates the communication path between the wellbore and fracture plane. Nonplanar fracture geometries such as multiple, T-Shaped, and reoriented fractures are not advantageous and they adversely affect the potential to achieve a desired stimulation treatment. Oriented perforations can be the solution to initiate a single wide fracture in vertical and deviated wells. Also oriented perforations may be used to create stable tunnels in poorly consolidated formations thus avoiding sand failure and consequently preventing sand production. This paper presents laboratory experimental results related to oriented perforations for hydraulic fracturing. It also discusses the use of oriented perforation for sand control. Experiments were designed to investigate the effect of perforation orientation in vertical and horizontal wells on hydraulic fracturing treatment.

Abass, H.H.; Meadows, D.L.; Brumley, J.L.; Hedayati, S.; Venditto, J.J.

1995-11-01T23:59:59.000Z

192

ARM - Campaign Instrument - s-band-profiler  

NLE Websites -- All DOE Office Websites (Extended Search)

govInstrumentss-band-profiler govInstrumentss-band-profiler Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign Instrument : NOAA S-band (2835 Mhz) Profiler (S-BAND-PROFILER) Instrument Categories Cloud Properties, Atmospheric Profiling Campaigns CRYSTAL-FACE [ Download Data ] Off Site Campaign : various, including non-ARM sites, 2002.06.26 - 2002.08.01 Midlatitude Continental Convective Clouds Experiment (MC3E): Multi-Frequency Profilers [ Download Data ] Southern Great Plains, 2011.04.22 - 2011.06.06 Tropical Warm Pool - International Cloud Experiment (TWP-ICE) [ Download Data ] Tropical Western Pacific, 2006.01.21 - 2006.02.13 Primary Measurements Taken The following measurements are those considered scientifically relevant. Refer to the datastream (netcdf) file headers for the list of all available

193

Rotational band properties in {sup 165}Er  

SciTech Connect

High-spin states in {sup 165}Er have been studied experimentally using the {sup 160}Gd({sup 9}Be, 4n) reaction at beam energies of 42 and 45 MeV. The previously known bands based on the 5/2{sup +}[642], 5/2{sup -}[523], and 11/2{sup -}[505] configurations are extended to (49/2{sup +}), (45/2{sup -}), and (31/2{sup -}) states, respectively. The rotational bands in {sup 165}Er generally show gradual alignment processes, indicating strong band interactions associated with the i{sub 13/2} neutron alignments. The band properties are compared with those in the neighboring nuclei and discussed within the framework of the cranked shell model.

Wang, S. T. [Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 (China); Graduate University of Chinese Academy of Sciences, Beijing 100049 (China); Zhou, X. H.; Zhang, Y. H.; Zheng, Y.; Liu, M. L.; Chen, L.; Zhang, N. T.; Hua, W.; Guo, S.; Qiang, Y. H.; Li, G. S.; Ding, B. [Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 (China); Shi, Y.; Xu, F. R. [School of Physics, and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 (China)

2011-07-15T23:59:59.000Z

194

Precipitation Banding in Idealized Baroclinic Waves  

Science Journals Connector (OSTI)

Moist idealized baroclinic-wave simulations show the development of precipitation bands from a zonally uniform initial midlatitude jet. For a frictionless lower boundary, and with no latent-heat release or surface heat and moisture fluxes, warm ...

Jesse Norris; Geraint Vaughan; David M. Schultz

2014-09-01T23:59:59.000Z

195

Efficient Band Gap Prediction for Solids  

E-Print Network (OSTI)

An efficient method for the prediction of fundamental band gaps in solids using density functional theory (DFT) is proposed. Generalizing the Delta self-consistent-field (?SCF [delta SCF]) method to infinite solids, the ...

Chan, Maria K.

196

Annual performance prediction for off-axis aligned Lugo heliostats at Solar Two  

SciTech Connect

The DELSOL computer code was used to model the annual Performance for numerous off-axis alignments of the Lugo heliostats located at the Solar Two site in Dagget, California. Recommended canting times are presented for the Lugo heliostats based upon their location in the field. Predicted annual performance of an off-axis alignment was actually higher than for on-axis alignment in some cases, and approximately equal if the recommended times are used. The annual performances of Solar One heliostats located nearby were also calculated, and illustrated the poorer performance expected of the Lugo heliostats.

Jones, S.A.

1996-02-01T23:59:59.000Z

197

Control Banding and Nanotechnology Synergist  

SciTech Connect

The average Industrial Hygienist (IH) loves a challenge, right? Okay, well here is one with more than a few twists. We start by going through the basics of a risk assessment. You have some chemical agents, a few workers, and the makings of your basic exposure characterization. However, you have no occupational exposure limit (OEL), essentially no toxicological basis, and no epidemiology. Now the real handicap is that you cannot use sampling pumps, cassettes, tubes, or any of the media in your toolbox, and the whole concept of mass-to-dose is out the window, even at high exposure levels. Of course, by the title, you knew we were talking about nanomaterials (NM). However, we wonder how many IHs know that this topic takes everything you know about your profession and turns it upside down. It takes the very foundations that you worked so hard in college and in the field to master and pulls it out from underneath you. It even takes the gold standard of our profession, the quantitative science of exposure assessment, and makes it look pretty darn rusty. Now with NM there is the potential to get some aspect of quantitative measurements, but the instruments are generally very expensive and getting an appropriate workplace personal exposure measurement can be very difficult if not impossible. The potential for workers getting exposures, however, is very real, as evidenced by a recent publication reporting worker exposures to polyacrylate nanoparticles in a Chinese factory (Song et al. 2009). With something this complex and challenging, how does a concept as simple as Control Banding (CB) save the day? Although many IHs have heard of CB, most of their knowledge comes from its application in the COSHH Essentials toolkit. While there is conflicting published research on COSHH Essentials and its value for risk assessments, almost all of the experts agree that it can be useful when no OELs are available (Zalk and Nelson 2008). It is this aspect of CB, its utility with uncertainty, that attracted international NM experts to recommend this qualitative risk assessment approach for NM. However, since their CB recommendation was only in theory, we took on the challenge of developing a working toolkit, the CB Nanotool (see Zalk et al. 2009 and Paik et al. 2008), as a means to perform a risk assessment and protect researchers at the Lawrence Livermore National Laboratory. While it's been acknowledged that engineered NM have potentially endless benefits for society, it became clear to us that the very properties that make nanotechnology so useful to industry could also make them dangerous to humans and the environment. Among the uncertainties and unknowns with NM are: the contribution of their physical structure to their toxicity, significant differences in their deposition and clearance in the lungs when compared to their parent material (PM), a lack of agreement on the appropriate indices for exposure to NM, and very little background information on exposure scenarios or populations at risk. Part of this lack of background information can be traced to the lack of risk assessments historically performed in the industry, with a recent survey indicating that 65% of companies working with NM are not doing any kind of NM-specific risk assessment as they focus on traditional PM methods for IH (Helland et al. 2009). The good news is that the amount of peer-reviewed publications that address environmental, health and safety aspects of NM has been increasing over the last few years; however, the percentage of these that address practical methods to reduce exposure and protect workers is orders of magnitude lower. Our intent in developing the CB Nanotool was to create a simplified approach that would protect workers while unraveling the mysteries of NM for experts and non-experts alike. Since such a large part of the toxicological effects of both the physical and chemical properties of NM were unknown, not to mention changing logarithmically as new NM research continues growing, we needed to account for this lack of information as part of the CB Nano

Zalk, D; Paik, S

2009-12-15T23:59:59.000Z

198

High Field W-Band (95 GHz) EPR | EMSL  

NLE Websites -- All DOE Office Websites (Extended Search)

Field W-Band (95 GHz) EPR High Field W-Band (95 GHz) EPR The W-band pulsed EPR spectrometer, introduced in 2011, is one of only two of its design worldwide. It uses a Quasi-optical...

199

Fast In Situ Airborne Measurement of Ammonia Using a Mid-Infrared Off-Axis ICOS Spectrometer  

SciTech Connect

A new ammonia (NH3) spectrometer was developed based on off-axis integrated cavity output spectroscopy. Its feasibility was demonstrated in airborne test flights in the troposphere on board of the Department of Energy (DOE) Gulfstream-1 (G-1) aircraft. This ammonia gas analyzer consists of an optical cell, a quantum-cascade laser, gas sampling system, electronics for control and data acquisition, and data-analysis software. The NH3 mixing ratio is determined from high-resolution NH3 absorption line shapes by tuning the laser wavelength over the sR(3,K) transition of the fundamental vibration band near 9.67 ?m. Excellent linearity is obtained in a wide range (0- 101 ppb) during calibration. The instrument is capable of collecting data at 2 Hz. Two research flights were conducted over Sunnyside, Washington. In the first test flight, the ammonia gas sensor was used to identify signatures of feedstock from local dairy farms with high vertical spatial resolution under low wind and stable atmospheric conditions. In the second flight, the NH3 spectrometer showed high sensitivity in capturing feedstock emission signals under windy and less stable conditions. Our results demonstrate that this new ammonia spectrometer is airborne feasible and that it has the capability to provide fast in situ observations of ammonia to advance our understanding of atmospheric compositions and aerosol formation.

Leen, Brian; Yu, Xiao-Ying; Gupta, Manish; Baer, Douglas S.; Hubbe, John M.; Kluzek, Celine D.; Tomlinson, Jason M.; Hubbell, Michael R.

2013-09-17T23:59:59.000Z

200

The effect of spin-orbit coupling in band structure of few-layer graphene  

SciTech Connect

Topological insulators are electronic materials that have a bulk band gap like an ordinary insulator but have protected conducting states on their edge or surface. This can be happened due to spin-orbit coupling and time-reversal symmetry. Moreover, the edge current flows through their edge or surface depends on its spin orientation and also it is robust against non-magnetic impurities. Therefore, topological insulators are predicted to be useful ranging from spintronics to quantum computation. Graphene was first predicted to be the precursor of topological insulator by Kane-Mele. They developed a Hamiltonian model to describe the gap opening in graphene. In this work, we investigate the band structure of few-layer graphene by using this model with analytical approach. The results of our calculations show that the gap opening occurs at K and K’ point, not only in single layer, but also in bilayer and trilayer graphene.

Sahdan, Muhammad Fauzi, E-mail: sahdan89@yahoo.co.id; Darma, Yudi, E-mail: sahdan89@yahoo.co.id [Department of Physics, Institut Teknologi Bandung, Jalan Ganesa 10, Bandung 40132 (Indonesia)

2014-03-24T23:59:59.000Z

Note: This page contains sample records for the topic "band axis orientation" 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

Design, fabrication, and testing of a three-dimensional monolithic compliant six-axis nanopositioner  

E-Print Network (OSTI)

The purpose of this research was to demonstrate the feasibility for creating a three-dimensional monolithic compliant six-axis nanopositioner. Much of this work was based off of the original two-dimensional HexFlex manipulator ...

Labuz, James (James R.)

2006-01-01T23:59:59.000Z

202

Advanced Technology Solar Telescope 4.2 m Off-axis Primary Mirror Fabrication  

Science Journals Connector (OSTI)

Advanced optical surfacing technologies are applied for the Advanced Technology Solar Telescope 4.2 m off-axis primary mirror fabrication. A newly developed Stressed lap and IR...

Kim, Dae Wook; Oh, Chang Jin; Su, Peng; Burge, James H

203

E-Print Network 3.0 - axis neutron spectrometer Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

results for: axis neutron spectrometer Page: << < 1 2 3 4 5 > >> 1 For more information: Neutron Scattering Science User Office, neutronusers@ornl.gov or (865) 574-4600. Summary:...

204

Regulation Of Fshr And SF-1 In The Hypothalamus-Pituitary-Gonadal (HPG) Axis.  

E-Print Network (OSTI)

Mammalian reproduction is highly dependent on the delicate balance of signals within the hypothalamic-pituitary-gonadal (HPG) axis that maintains proper endocrine environment. One of the key signals is the pituitary ...

George, Jitu Wilson

2013-08-31T23:59:59.000Z

205

Analysis and Strategies for Five-Axis Near-Dry EDM Milling.  

E-Print Network (OSTI)

??Strategies for precision five-axis near-dry electric discharge machining (EDM) milling are investigated. By understanding the material removal process behind near-dry EDM milling, its performance can… (more)

Fujiki, Masahiro

2009-01-01T23:59:59.000Z

206

Modeling of multiple-optical-axis pattern-integrated interference lithography systems.  

E-Print Network (OSTI)

??The image quality and collimation in a multiple-optical-axis pattern-integrated interference lithography system are evaluated for an elementary optical system composed of single-element lenses. Image quality… (more)

Sedivy, Donald E.

2014-01-01T23:59:59.000Z

207

SC COLLABORATOR: A SERVICE ORIENTED FRAMEWORK FOR CONSTRUCTION SUPPLY CHAIN  

E-Print Network (OSTI)

, service oriented architecture (SOA) with open source technologies is a desirable computing modelSC COLLABORATOR: A SERVICE ORIENTED FRAMEWORK FOR CONSTRUCTION SUPPLY CHAIN COLLABORATION for construction supply chain collaboration and management, through a prototype service oriented system framework

Stanford University

208

A service-oriented architecture for authentication and authorization  

E-Print Network (OSTI)

THESIS A Service-oriented Architecture for AuthenticationSAN DIEGO A Service-oriented Architecture for Authentication2.0, which is a service-oriented architecture that addresses

Hamedtoolloei, Hamidreza

2009-01-01T23:59:59.000Z

209

Network Communication as a Service-Oriented Capability  

E-Print Network (OSTI)

PerfSONAR: A Service Oriented Architecture for Multi– DomainArchitecture: A service oriented architecture (SOA) has beenarchitecture to support multiple classes of service; development and deployment of service-oriented

Johnston, William

2008-01-01T23:59:59.000Z

210

THIRD EDITION (REVISED PRINTING) SERVICE-ORIENTED COMPUTING  

E-Print Network (OSTI)

....................................................................................................10 1.3 Service-Oriented Architecture and ComputingTHIRD EDITION (REVISED PRINTING) SERVICE-ORIENTED COMPUTING AND WEB SOFTWARE INTEGRATION FROM) ............................................................................................................xv Part I Distributed Service-Oriented Software Development and Web Data Management

Chen, Yinong

211

Architectural Approaches, Concepts and Methodologies of Service Oriented Architecture  

E-Print Network (OSTI)

Architectural Approaches, Concepts and Methodologies of Service Oriented Architecture Master Thesis. Introduction to Service Oriented Architecture........................................... 2.1 Evolution Middleware (MOM)........................................... 2.5 Definition of Service Oriented Architecture

Moeller, Ralf

212

Scalable, Fault-tolerant Management in a Service Oriented Architecture  

E-Print Network (OSTI)

Scalable, Fault-tolerant Management in a Service Oriented Architecture Harshawardhan Gadgil: Scalable, Fault-tolerance, Service Oriented Management, Architecture 1. Introduction With the explosion. The service-oriented architecture provides a simple and flexible framework for building sophisticated

213

Processing and thermal properties of molecularly oriented polymers  

E-Print Network (OSTI)

High molecular weight polymers that are linear in molecular construction can be oriented such that some of their physical properties in the oriented direction are enhanced. For over 50 years polymer orientation and processing ...

Skow, Erik (Erik Dean)

2007-01-01T23:59:59.000Z

214

Study of Reflected Shock Wave Perturbations at the Central Axis of Dense Plasma Column in a Plasma Focus  

Science Journals Connector (OSTI)

When the shock front (SF) hits the central axis of plasma focus device, a reflected shock moves radially outwards...

Morteza Habibi

2011-12-01T23:59:59.000Z

215

Solar radiation on variously oriented sloping surfaces  

SciTech Connect

Monthly average daily irradiation on surfaces tilted towards the equator and also inclined at various azimuth angles are estimated for two locations in Lesotho and the results are presented. The isotropic model suggested by Liu and Jordan (Trans. of Ashrae, 526, 1962) along with the modified equation of Klein (Solar Energy, 19, 4, 1977) are employed for the estimation purposes. Surface orientations are selected at three inclinations for six different azimuth angles. Conclusions are reached for optimum tilt and orientation for summer, winter and annual collection. Total annual radiation values are computed for all the slopes and orientations.

Gopinathan, K.K. (National Univ. of Lesotho, Roma (South Africa))

1991-01-01T23:59:59.000Z

216

Ball nose milling cutter radius compensation in Z axis for CNC  

Science Journals Connector (OSTI)

A new AutoCAD/VisualLISP based method to substitute the 3D tool radius compensation in Z axis for CNC milling processes is here described. Specific features of VisualLISP programming language combined with AutoCAD facilities are used to gather the data ... Keywords: AutoCAD VisualLISP, CNC milling, Z axis compensation, complex shaped parts, tool radius compensation

Dragoi Mircea Viorel

2009-02-01T23:59:59.000Z

217

Band-Gap Engineering of Carbon Nanotubes with Grain Boundaries...  

NLE Websites -- All DOE Office Websites (Extended Search)

Band-Gap Engineering of Carbon Nanotubes with Grain Boundaries. Band-Gap Engineering of Carbon Nanotubes with Grain Boundaries. Abstract: Structure and electronic properties of...

218

Highly Mismatched Alloys for Intermediate Band Solar Cells  

E-Print Network (OSTI)

single-junction intermediate band solar cells. Figure 5:conversion efficiency for a solar cell fabricated from a Znfor Intermediate Band Solar Cells W. Walukiewicz 1 , K. M.

2005-01-01T23:59:59.000Z

219

FSI Modeling of Vertical-Axis Wind Turbines Y. Bazilevs, A. Korobenko, X. Deng, and J. Yan  

E-Print Network (OSTI)

FSI Modeling of Vertical-Axis Wind Turbines Y. Bazilevs, A. Korobenko, X. Deng, and J. Yan-dependent aerodynamics and fluid-structure interaction (FSI) simula- tions of a Darrieus-type vertical-axis wind turbine compared to the vertical-axis wind turbine (VAWT) designs. However, smaller-size VAWTs are more suitable

Dabiri, John O.

220

Orientation dependent tensile deformation behavior of two-phase laminate composites: Model analysis and finite element results  

SciTech Connect

A model is presented which allows the distribution of stresses and strains within a two-phase laminate to be determined as a function of the angle between the normal vector to the laminate interfaces and the tensile axis during elastic and elastic-plastic deformation. The model is applied to {alpha}{sub 2}(Ti{sub 3}Al)/{gamma}(TiAl) and, for comparison, to Al/Al{sub 2}O{sub 3} laminates in order to study (a) the transfer of stresses between the two phases due to the mutual deformation constraint at the interphase boundaries and (b) the dependence of the yield stress on the orientation of the lamellae with respect to the tensile axis. The model predictions are in good agreement with the results of finite element computations within the composite except for certain boundary layers at the outer surfaces.

Mertins, H.; Lahann, H.J. [GKSS-Forschungszentrum Geesthacht GmbH (Germany). Inst. fuer Werkstofforschung] [GKSS-Forschungszentrum Geesthacht GmbH (Germany). Inst. fuer Werkstofforschung

1996-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "band axis orientation" 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

Proto-Model of an Infrared Wide-Field Off-Axis Telescope  

E-Print Network (OSTI)

We develop a proto-model of an off-axis reflective telescope for infrared wide-field observations based on the design of Schwarzschild-Chang type telescope. With only two mirrors, this design achieves an entrance pupil diameter of 50 mm and an effective focal length of 100 mm. We can apply this design to a mid-infrared telescope with a field of view of 8 deg X 8 deg. In spite of the substantial advantages of off-axis telescopes in the infrared compared to refractive or on-axis reflective telescopes, it is known to be difficult to align the mirrors in off-axis systems because of their asymmetric structures. Off-axis mirrors of our telescope are manufactured at the Korea Basic Science Institute (KBSI). We analyze the fabricated mirror surfaces by fitting polynomial functions to the measured data. We accomplish alignment of this two-mirror off-axis system using a ray tracing method. A simple imaging test is performed to compare a pinhole image with a simulated prediction.

Kim, Sanghyuk; Chang, Seunghyuk; Kim, Geon Hee; Yang, Sun Choel; Kim, Myung Sang; Lee, Sungho; Lee, Hanshin; 10.5303/JKAS.2010.43.5.169

2010-01-01T23:59:59.000Z

222

-Learning: A Robotics Oriented Reinforcement Learning Josep M. Porta  

E-Print Network (OSTI)

-Learning: A Robotics Oriented Reinforcement Learning Algorithm Josep M. Porta Institut de Robotica Oriented Reinforcement Learning Algorithm Josep M. Porta Institut de Robotica i Informatica Industrial (UPC

Portland State University

223

The influence of molecular orientation on organic bulk heterojunction...  

NLE Websites -- All DOE Office Websites (Extended Search)

The influence of molecular orientation on organic bulk heterojunction solar cells The influence of molecular orientation on organic bulk heterojunction solar cells Print Monday, 28...

224

Single-molecule orientation measurements with a quadrated pupil  

Science Journals Connector (OSTI)

This Letter presents a means of measuring the dipole orientation of a fluorescent, orientationally fixed single molecule, which uses a specially designed phase mask, termed a...

Backer, Adam S; Backlund, Mikael P; Lew, Matthew D; Moerner, W E

2013-01-01T23:59:59.000Z

225

Analysis of the interband optical transitions: Characterization of synthetic DNA band structure  

Science Journals Connector (OSTI)

We analyze the band structure and interband optical transitions in a dangling backbone ladder DNAmodel. Using this model semiconducting synthetic poly(G)-poly(C) DNA is studied by means of a tight-binding model traditionally used for transport studies. Numerical calculations for optical absorptionspectra are also presented. By studying the eigenstates’ symmetries in uniform and nonuniform DNA chains we conclude that in both cases the transitions are almost vertical in K space. The optical gap turns out larger than the electronic one and an indirect band gap electronic structure for this DNAmodel is revealed. The effects of the environment which are relevant for the wet form of DNA are taken into account by introducing disorder in the backbone levels. We demonstrate that they affect more the spectra in the case of parallel polarization of the incoming light (with respect to the molecule axis). In such a case the closure of the gap appears for a large enough disorder. We also consider the natural helix DNA conformation and find unusual selection rules for interband optical transitions. We propose that a comparison between the obtained spectra and the experiments can provide an insight into the electronic band structure of DNA.

Elena Díaz

2008-01-01T23:59:59.000Z

226

Biaxially Oriented Film on Flexible Polymeric Substrate  

NLE Websites -- All DOE Office Websites (Extended Search)

Biaxially Oriented Film on Flexible Polymeric Substrate Biaxially Oriented Film on Flexible Polymeric Substrate Biaxially Oriented Film on Flexible Polymeric Substrate A semiconducting structure having a glass substrate. Available for thumbnail of Feynman Center (505) 665-9090 Email Biaxially Oriented Film on Flexible Polymeric Substrate LANL's Aligned-Crystalline Silicon (ACSi) technology provides highly crystalline silicon films on inexpensive substrates, such as metal sheets and glass plates. ACSi films exhibit good electrical and optical properties and have the potential to make an impact on the solar cell industry. The current ACSi prototype, designed under subpar tooling conditions in a non-optimal environment, already demonstrates 2% conversion efficiency. U.S. Patent No.: 7,601.430 (DOE S-104,959) Patent Application Filing Date: January 31, 2006

227

Object-Oriented Modelling of Flexible Beams  

Science Journals Connector (OSTI)

In this paper the problem of modelling flexible thin beams in multibody systems is tackled. The proposed model, implemented with the object-oriented modelling language Modelica, is completely modular, allowing th...

Francesco Schiavo; Luca Viganò; Gianni Ferretti

2006-04-01T23:59:59.000Z

228

ENVIRONMENTAL HEALTH & SAFETY EMPLOYEE SAFETY ORIENTATION  

E-Print Network (OSTI)

ENVIRONMENTAL HEALTH & SAFETY EMPLOYEE SAFETY ORIENTATION SIMON FRASER UNIVERSITY ENVIRONMENTAL HEALTH & SAFETY DEPARTMENT Discovery Park - MTF 8888 University Drive Burnaby, British Columbia Canada V5 FOOTWEAR 23867 TRADES & CONSTRUCTION 23867 TRANSPORT OF DANGEROUS GOODS 27265 WORKPLACE ENVIRONMENT 23867

229

Preferred orientation of ettringite in concrete fractures  

Science Journals Connector (OSTI)

Hard synchrotron X-ray microdiffraction is used to quantify the orientation distribution of ettringite crystals [Ca6Al2(OH)12(SO4)3·26H2O], which cause cracking and loss of strength in concrete structures.

Wenk, H.-R.

2009-05-15T23:59:59.000Z

230

Variations of ionization potential and electron affinity as a function of surface orientation: The case of orthorhombic SnS  

SciTech Connect

We investigated the dependence of absolute SnS band-edge energies on surface orientation using density functional theory and GW method for all surfaces with Miller indices ?3?h,k,l?3 and found variations as large as 0.9?eV as a function of (hkl). Variations of this magnitude may affect significantly the performance of photovoltaic devices based on polycrystalline SnS thin-films and, in particular, may contribute to the relatively low measured open circuit voltage of SnS solar cells. X-ray diffraction measurements confirm that our thermally evaporated SnS films exhibit a wide distribution of different grain orientations, and the results of Kelvin force microscopy support the theoretically predicted variations of the absolute band-edge energies.

Stevanovi?, Vladan, E-mail: vstevano@mines.edu [Colorado School of Mines, Golden, Colorado 80401 (United States); National Renewable Energy Laboratory, Golden, Colorado 80401 (United States); Hartman, Katy; Jaramillo, R.; Buonassisi, Tonio [Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); Ramanathan, Shriram [Harvard University, Cambridge, Massachusetts 02138 (United States); Graf, Peter [National Renewable Energy Laboratory, Golden, Colorado 80401 (United States)

2014-05-26T23:59:59.000Z

231

Antiferromagnetism in Narrow-Band Solids  

Science Journals Connector (OSTI)

The single-band Hubbard Hamiltonian is examined in the limit of bandwidth much less than intraatomic Coulomb interaction of electrons. We make use of the canonical transformation and "spectral decomposition" of the electron creation operators proposed by Harris and Lange to write down a Green's function which describes electrons in the lower of the split bands of Hubbard's solution. The equation of motion is solved using the moment-conserving decoupling approximation of Tahir-Kheli and Jarrett. We find within our approximation that it is impossible to have an antiferromagnetic state for other than one electron per site. To remedy this defect of the single-band model, we investigate a simplified two-band model in the limit of intra-atomic Coulomb and exchange interaction much greater than the bandwidth, and find that antiferromagnetism is possible for the two nearly half-filled bands. We also discuss effects of the antiferromagnetic ordering on the conductivity in our simplified model and discuss applicability of the theory to real transition metals and transition-metal oxides.

J. B. Sokoloff

1970-02-01T23:59:59.000Z

232

Energy Band Model Based on Effective Mass  

E-Print Network (OSTI)

In this work, we demonstrate an alternative method of deriving an isotropic energy band model using a one-dimensional definition of the effective mass and experimentally observed dependence of mass on energy. We extend the effective mass definition to anti-particles and particles with zero rest mass. We assume an often observed linear dependence of mass on energy and derive a generalized non-parabolic energy-momentum relation. The resulting non-parabolicity leads to velocity saturation at high particle energies. We apply the energy band model to free relativistic particles and carriers in solid state materials and obtain commonly used dispersion relations and experimentally confirmed effective masses. We apply the model to zero rest mass particles in graphene and propose using the effective mass for photons. Therefore, it appears that the new energy band model based on the effective mass can be applied to relativistic particles and carriers in solid state materials.

Viktor Ariel

2012-09-06T23:59:59.000Z

233

Radiative Heating in Underexplored Bands Campaign (RHUBC)  

NLE Websites -- All DOE Office Websites (Extended Search)

Bands Campaign (RHUBC) D. Turner and E. Mlawer RHUBC Breakout Session 2008 ARM Science Team Meeting 13 March, 2008 Norfolk, Virginia Motivation * Radiative heating/cooling in the mid-troposphere modulate the vertical motions of the atmosphere - This heating/cooling occurs primarily in water vapor absorption bands that are opaque at the surface * Approximately 40% of the OLR comes from the far-IR * Until recently, the observational tools were not available to evaluate the accuracy of the far-IR radiative transfer models - Spectrally resolved far-IR radiances, accurate PWV * Need to validate both clear sky (WV) absorption and cirrus scattering properties in these normally opaque bands Scientific Objectives * Conduct clear sky radiative closure studies in order to reduce uncertainties

234

System-level, Unified In-band and Out-of-band Dynamic Thermal Control  

E-Print Network (OSTI)

and improve the reliability of systems. Our thermal control framework unifies temperature control mechanisms supply, etc.) to operate less efficiently. Third, high temperatures can trigger thermal emergenciesSystem-level, Unified In-band and Out-of-band Dynamic Thermal Control Dong Li* , Rong Ge** , Kirk

235

A hypothesis of inductive drive to explain the sawtooth measurements of tokamak experiment for technology oriented research (TEXTOR)  

SciTech Connect

A hypothesis, based on the current density profile determined from the principle of minimum dissipation of magnetic energy, is applied to explain the measurement of q(0) and current variation in a sawtooth cycle in tokomak experiment for technology oriented research (TEXTOR) [Plasma Physics and Controlled Nuclear Fusion Research (IAEA, Vienna, 1985), Vol. I, p. 193]. A sawtooth oscillation is triggered when the on-axis current density in a configuration with m=0 and n=0 symmetry is driven inductively to a limit.

Chu, T. K. [Plasma Physics Laboratory, Princeton University, P. O. Box 451, Princeton, New Jersey 08543 (United States)

2006-07-15T23:59:59.000Z

236

Band structure of doubly-odd nuclei around mass 130  

SciTech Connect

Nuclear structure of the doublet bands in the doubly-odd nuclei with mass A{approx}130 is studied in terms of a pair-truncated shell model. The model reproduces quite well the energy levels of the doublet bands and the electromagnetic transitions. The analysis of the electromagnetic transitions reveals new band structure of the doublet bands.

Higashiyama, Koji [Department of Physics, Chiba Institute of Technology, Narashino, Chiba 275-0023 (Japan); Yoshinaga, Naotaka [Department of Physics, Saitama University, Saitama City 338-8570 (Japan)

2011-05-06T23:59:59.000Z

237

model strongly interacting particles as rubber bands.  

E-Print Network (OSTI)

model strongly interacting particles as rubber bands. Nothing is perfect, of course. Some relativity, there is a tempta- tion to carry intelligent design to an ex- treme in which God wrote (recall Bohr's admonition, "Stop telling God what to do!"). The landscape picture derails this thinking

Hughes, Kim

238

The ‘Wave Band' Theory of Wireless Transmission  

Science Journals Connector (OSTI)

... the tuned circuit, namely, that the really selective circuit does cut off the higher audio frequencies, generally explained by the ‘cutting of the side bands’ What is actually ... its excitation has ceased. If it is excited by a carrier modulated by a high audio frequency, the persistence of its vibrations will not allow the amplitude of these to ...

A. A. NEWBOLD

1930-03-01T23:59:59.000Z

239

AXIS: An instrument for imaging Compton radiographs using the Advanced Radiography Capability on the NIF  

SciTech Connect

Compton radiography is an important diagnostic for Inertial Confinement Fusion (ICF), as it provides a means to measure the density and asymmetries of the DT fuel in an ICF capsule near the time of peak compression. The AXIS instrument (ARC (Advanced Radiography Capability) X-ray Imaging System) is a gated detector in development for the National Ignition Facility (NIF), and will initially be capable of recording two Compton radiographs during a single NIF shot. The principal reason for the development of AXIS is the requirement for significantly improved detection quantum efficiency (DQE) at high x-ray energies. AXIS will be the detector for Compton radiography driven by the ARC laser, which will be used to produce Bremsstrahlung X-ray backlighter sources over the range of 50 keV–200 keV for this purpose. It is expected that AXIS will be capable of recording these high-energy x-rays with a DQE several times greater than other X-ray cameras at NIF, as well as providing a much larger field of view of the imploded capsule. AXIS will therefore provide an image with larger signal-to-noise that will allow the density and distribution of the compressed DT fuel to be measured with significantly greater accuracy as ICF experiments are tuned for ignition.

Hall, G. N., E-mail: hall98@llnl.gov; Izumi, N.; Tommasini, R.; Carpenter, A. C.; Palmer, N. E.; Zacharias, R.; Felker, B.; Holder, J. P.; Allen, F. V.; Bell, P. M.; Bradley, D.; Montesanti, R.; Landen, O. L. [Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550 (United States)

2014-11-15T23:59:59.000Z

240

Service-Oriented Architectures and Mobile Services Ivar Jrstad1  

E-Print Network (OSTI)

Service-Oriented Architectures and Mobile Services Ivar Jørstad1 , Schahram Dustdar2 and Do van-van.do@telenor.com http://www.item.ntnu.no/~thanhvan Abstract. Service-Oriented architectures and Service-Oriented- Oriented architecture. A general discussion of equivalence between service components is then undertaken

Dustdar, Schahram

Note: This page contains sample records for the topic "band axis orientation" 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

A Model for Dynamic Reconfiguration in Service-oriented Architectures  

E-Print Network (OSTI)

A Model for Dynamic Reconfiguration in Service-oriented Architectures Jos´e Luiz Fiadeiro1 and Ant of service-oriented applications goes be- yond what is currently addressed by existing architecture of service-oriented applications. 1 Introduction Several architectural aspects arise from service-oriented

Lopes, Antónia

242

Understanding objects in use-oriented Olav W. Bertelsen  

E-Print Network (OSTI)

. One of the basic concepts in object-orientation is physical modelling, i.e. structuring computer is an investigation into the relation between use-oriented design and object-oriented methods. Based on the notions of boundary objects, it is argued that object-oriented descriptions should be understood as transformations

Bertelsen, Olav W.

243

X-Band Photoinjector Beam Dynamics  

SciTech Connect

SLAC is studying the feasibility of using an X-band RF photocathode gun to produce low emittance bunches for applications such as a mono-energetic MeV {gamma} ray source (in collaboration with LLNL) and a photoinjector for a compact FEL. Beam dynamics studies are being done for a configuration consisting of a 5.5-cell X-band gun followed by several 53-cell high-gradient X-band accelerator structures. A fully 3D program, ImpactT, is used to track particles taking into account space charge forces, short-range longitudinal and transverse wakefields, and the 3D rf fields in the structures, including the quadrupole component of the couplers. The effect of misalignments of the various elements, including the drive-laser, gun, solenoid and accelerator structures, are evaluated. This paper presents these results and estimates of the expected bunch emittance vs cathode gradient, and the effects of mixing between the fundamental and off-frequency longitudinal modes. An X-band gun at SLAC has been shown to operate reliably with a 200 MV/m acceleration gradient at the cathode, which is nearly twice the 115 MV/m acceleration gradient in the LCLS gun. The higher gradient should roughly balance the space charge related transverse emittance growth for the same bunch charge but provide a 3-4 times shorter bunch length. The shorter length would make the subsequent bunch compression easier and allow for a more effective use of emittance exchange. Such a gun can also be used with an X-band linac to produce a compact FEL or g ray source that would require rf sources of only one frequency for beam generation and acceleration. The feasibility of using an X-band rf photocathode gun and accelerator structures to generate high quality electron beams for compact FELs and g ray sources is being studied at SLAC. Results from the X-band photoinjector beam dynamics studies are reported in this paper.

Zhou, Feng; /SLAC; Adolphsen, Chris; /SLAC; Ding, Yuantao; /SLAC; Li, Zenghai; /SLAC; Vlieks, Arnold; /SLAC

2011-12-13T23:59:59.000Z

244

Preferential growth orientation of laser-patterned LiNbO{sub 3} crystals in lithium niobium silicate glass  

SciTech Connect

Dots and lines consisting of LiNbO{sub 3} crystals are patterned on the surface of 1CuO-40Li{sub 2}O-32Nb{sub 2}O{sub 5}-28SiO{sub 2} (mole ratio) glass by irradiations of continuous-wave Nd:YAG laser (wavelength: {lambda}=1064 nm), diode laser ({lambda}=795 nm), and Yb:YVO{sub 4} fiber laser ({lambda}=1080 nm), and the feature of laser-patterned LiNbO{sub 3} crystal growth is examined from linearly polarized micro-Raman scattering spectrum measurements. LiNbO{sub 3} crystals with the c-axis orientation are formed at the edge parts of the surface and cross-section of dots. The growth direction of an LiNbO{sub 3} along the laser scanning direction is the c-axis. It is proposed that the profile of the temperature distribution in the laser-irradiated region and its change along laser scanning would be one of the most important conditions for the patterning of crystals with a preferential growth orientation. Laser irradiation giving a narrow width is also proposed to be one of the important factors for the patterning of LiNbO{sub 3} crystal lines with homogeneous surface morphologies. -- Graphical abstract: Polarized optical microscope observations for the surface and cross-section of the dot obtained by LD laser ({lambda}=795 nm) irradiations of P=1.4 W and t=20 s in Cu-LNS glass. Schematic model for the orientation of LiNbO{sub 3} crystals at the edge parts of the surface and cross-section of the dot is also shown. Display Omitted Research highlights: > Dots and lines with LiNbO{sub 3} crystals are patterned on the glass surface by laser irradiations. > LiNbO{sub 3} crystals with the c-axis orientation are formed at the edge parts of the surface and cross-section of dots. > The profile of the temperature distribution in the laser-irradiated region is one of the most important conditions for the patterning of highly oriented crystals.

Komatsu, T., E-mail: komatsu@mst.nagaokaut.ac.j [Department of Materials Science and Technology, Nagaoka University of Technology, 1603-1 Kamitomioka-cho, Nagaoka 940-2188 (Japan); Koshiba, K.; Honma, T. [Department of Materials Science and Technology, Nagaoka University of Technology, 1603-1 Kamitomioka-cho, Nagaoka 940-2188 (Japan)

2011-02-15T23:59:59.000Z

245

Low-temperature oriented growth of vanadium dioxide films on CoCrTa metal template on Si and vertical metal-insulator transition  

SciTech Connect

The authors achieved oriented growth of vanadium dioxide (VO{sub 2}) films on CoCrTa metal template grown on an Si substrate. Low-temperature ({approx}250 Degree-Sign C) deposition of VO{sub 2} films using inductively coupled-plasma-assisted sputtering technique realized an abrupt interface between VO{sub 2} and CoCrTa layers, suppressing the oxidation and diffusion of metal components. The films revealed a metal-insulator transition with resistance change of over 2 orders of magnitude. The CoCrTa film, in which Co hexagonal crystalline grains with c-axis orientation were surrounded by segregated Cr and Ta, serves for the oriented growth of VO{sub 2} crystalline film, enabling higher orders of transition in resistance and low voltage switching, even for the vertical (out-of-plane) direction.

Okimura, Kunio; Mian, Md.Suruz [School of Engineering, Tokai University, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 259-1292 (Japan)

2012-09-15T23:59:59.000Z

246

Power performance of canted blades for a vertical axis wind turbine  

Science Journals Connector (OSTI)

Small scale vertical axis wind turbines have a number of advantages for deployment in an urban environment but are subject to highly varying thrust and radial aerodynamic forces. Helical blade shapes for vertical axis wind turbines can reduce load fluctuations during turbine operation; however a helix has complicated three-dimensional geometry that can be difficult to manufacture resulting in expensive blades. A new blade configuration based on twisted straight blades that are mounted at an angle to the vertical a cant has been developed and tested in a wind tunnel in a number of different configurations and conditions. They offer the benefits of distributing the fluctuating aerodynamic loads but incorporate a linear axis so that they can be manufactured at a comparable cost to simple straight blades. The power performance data from the tunnel testing show that canted blades have comparable power output to similar straight blades and that aerodynamic fences can be used to improve power performance.

Shawn Armstrong; Stephen Tullis

2011-01-01T23:59:59.000Z

247

Development and Test Plans for a small Vertical Axis Turbine Designed and  

NLE Websites -- All DOE Office Websites (Extended Search)

Development and Test Plans for a small Vertical Axis Turbine Designed and Development and Test Plans for a small Vertical Axis Turbine Designed and Built by the Russian State Rocket Center under Berkeley Lab auspices Speaker(s): Anthony Radspieler Jr. Glen Dahlbacka Joseph Rasson Date: March 4, 2010 - 12:00pm Location: 90-3122 Berkeley Lab Engineering Division teamed with Empire Magnetics, Rohnert Park and the Makeyev State Rocket Center under a DOE NNSA non-proliferation project to develop and test a series of small wind turbines of vertical axis design. Over the years, about 100 Russian scientists and engineers worked on the project and the hydrodynamic, aerodynamic and mechanical test facilities of the SRC were used. The objective was to create a highly manufacturable Darieus unit with a modest Tip Speed Ratio (quiet and low

248

From Object-Oriented Programming to Service-Oriented Computing: How to Improve Interoperability by Preserving Subtyping  

E-Print Network (OSTI)

for Service Oriented Architecture (SOA). Among the restrictions imposed in the current practice for webFrom Object-Oriented Programming to Service-Oriented Computing: How to Improve Interoperability´epartement Informatique, ´Ecole des Mines de Nantes, Nantes, France {first name.last name}@emn.fr Keywords: Service-Oriented

Paris-Sud XI, Université de

249

in: M. van Ginkel, P.W. Verbeek, and L.J. van Vliet, Improved Orientation Selectivity for Orientation Estimation,  

E-Print Network (OSTI)

Conference on Image Analysis (Lappeenranta, Finland, June 9-11), 1997, 533-537. Improved Orientation

van Vliet, Lucas J.

250

in: M. van Ginkel, P.W. Verbeek, and L.J. van Vliet, Improved Orientation Selectivity for Orientation Estimation,  

E-Print Network (OSTI)

Conference on Image Analysis (Lappeenranta, Finland, June 9­11), 1997, 533­537. Improved Orientation

van Vliet, Lucas J.

251

Atomic resolution electrostatic potential mapping of graphene sheets by off-axis electron holography  

SciTech Connect

Off-axis electron holography has been performed at atomic resolution with the microscope operated at 80?kV to provide electrostatic potential maps from single, double, and triple layer graphene. These electron holograms have been reconstructed in order to obtain information about atomically resolved and mean inner potentials. We propose that off-axis electron holography can now be used to measure the electrical properties in a range of two-dimensional semiconductor materials and three dimensional devices comprising stacked layers of films to provide important information about their electrical properties.

Cooper, David, E-mail: david.cooper@cea.fr [University Grenoble Alpes, F-38000 Grenoble (France); CEA, LETI, MINATEC Campus, F-38054, Grenoble (France); Pan, Cheng-Ta; Haigh, Sarah [School of Materials, The University of Manchester, Manchester M13 9PL (United Kingdom)

2014-06-21T23:59:59.000Z

252

A two-dimensional matrix correction for off-axis portal dose prediction errors  

SciTech Connect

Purpose: This study presents a follow-up to a modified calibration procedure for portal dosimetry published by Bailey et al. ['An effective correction algorithm for off-axis portal dosimetry errors,' Med. Phys. 36, 4089-4094 (2009)]. A commercial portal dose prediction system exhibits disagreement of up to 15% (calibrated units) between measured and predicted images as off-axis distance increases. The previous modified calibration procedure accounts for these off-axis effects in most regions of the detecting surface, but is limited by the simplistic assumption of radial symmetry. Methods: We find that a two-dimensional (2D) matrix correction, applied to each calibrated image, accounts for off-axis prediction errors in all regions of the detecting surface, including those still problematic after the radial correction is performed. The correction matrix is calculated by quantitative comparison of predicted and measured images that span the entire detecting surface. The correction matrix was verified for dose-linearity, and its effectiveness was verified on a number of test fields. The 2D correction was employed to retrospectively examine 22 off-axis, asymmetric electronic-compensation breast fields, five intensity-modulated brain fields (moderate-high modulation) manipulated for far off-axis delivery, and 29 intensity-modulated clinical fields of varying complexity in the central portion of the detecting surface. Results: Employing the matrix correction to the off-axis test fields and clinical fields, predicted vs measured portal dose agreement improves by up to 15%, producing up to 10% better agreement than the radial correction in some areas of the detecting surface. Gamma evaluation analyses (3 mm, 3% global, 10% dose threshold) of predicted vs measured portal dose images demonstrate pass rate improvement of up to 75% with the matrix correction, producing pass rates that are up to 30% higher than those resulting from the radial correction technique alone. As in the 1D correction case, the 2D algorithm leaves the portal dosimetry process virtually unchanged in the central portion of the detector, and thus these correction algorithms are not needed for centrally located fields of moderate size (at least, in the case of 6 MV beam energy).Conclusion: The 2D correction improves the portal dosimetry results for those fields for which the 1D correction proves insufficient, especially in the inplane, off-axis regions of the detector. This 2D correction neglects the relatively smaller discrepancies that may be caused by backscatter from nonuniform machine components downstream from the detecting layer.

Bailey, Daniel W. [Department of Physics, State University of New York at Buffalo, Buffalo, New York 14260 (United States); Department of Radiation Medicine, Roswell Park Cancer Institute, Buffalo, New York 14263 (United States); Kumaraswamy, Lalith; Bakhtiari, Mohammad [Department of Radiation Medicine, Roswell Park Cancer Institute, Buffalo, New York 14263 (United States); Podgorsak, Matthew B. [Department of Radiation Medicine, Roswell Park Cancer Institute, Buffalo, New York 14263 and Department of Physiology and Biophysics, State University of New York at Buffalo, Buffalo, New York 14214 (United States)

2013-05-15T23:59:59.000Z

253

Reconstruction of the Electron Density of Molecules with Single-Axis Alignment  

SciTech Connect

Diffraction from the individual molecules of a molecular beam, aligned parallel to a single axis by a strong electric field or other means, has been proposed as a means of structure determination of individual molecules. As in fiber diffraction, all the information extractable is contained in a diffraction pattern from incidence of the diffracting beam normal to the molecular alignment axis. We present two methods of structure solution for this case. One is based on the iterative projection algorithms for phase retrieval applied to the coefficients of the cylindrical harmonic expansion of the molecular electron density. Another is the holographic approach utilizing presence of the strongly scattering reference atom for a specific molecule.

Starodub, Dmitri

2011-08-12T23:59:59.000Z

254

Quantum-Dot Intermediate-Band Solar Cells with Inverted Band Alignment  

SciTech Connect

The intermediate-band concept was proposed over a decade ago as a possible route to increase the efficiency of single-junction solar cells. Despite a number of experimental attempts to realize this concept, no efficiency improvement over conventional single-junction solar cells has so far been demonstrated. This is likely due to the fact that the intermediate band itself acts to enhance electron-hole recombination. In this work we propose a novel intermediate-band solar-cell architecture based on doped semiconductor nanostructures having an inverted type-I band alignment with the surrounding host. The recombination of carriers in the nanostructures is prevented by ultra-fast charge transfer to the host, thereby removing the main obstacle to achieve high conversion efficiency.

Francheschetti, A.; Lany, S.; Bester, G.

2008-01-01T23:59:59.000Z

255

Security Model For Service-Oriented Architecture  

E-Print Network (OSTI)

In this article, we examine how security applies to Service Oriented Architecture (SOA). Before we discuss security for SOA, lets take a step back and examine what SOA is. SOA is an architectural approach which involves applications being exposed as "services". Originally, services in SOA were associated with a stack of technologies which included SOAP, WSDL, and UDDI. This article addresses the defects of traditional enterprise application integration by combining service oriented-architecture and web service technology. Application integration is then simplified to development and integration of services to tackle connectivity of isomerous enterprise application integration, security, loose coupling between systems and process refactoring and optimization.

Karimi, Oldooz

2011-01-01T23:59:59.000Z

256

Ethylene adsorbed on Ni(110): An experimental and theoretical determination of the two-dimensional band structure  

Science Journals Connector (OSTI)

We have investigated the saturated ethylene layer on Ni(110) by low-energy electron diffraction (LEED), angle-resolved ultraviolet photoemission spectroscopy (ARUPS), and near-edge x-ray-absorption fine structure (NEXAFS). This layer exhibits a c(2×4) LEED pattern that corresponds to a structure containing two adsorbates per primitive unit cell. The ethylene molecules are adsorbed with the molecular plane parallel to the surface and the C-C axis preferentially aligned along the [11¯0] direction of the substrate, as is independently determined from the ARUPS and NEXAFS experiments. The two-dimensional (2D) adsorbate band structure is determined from the ARUPS spectra at various photon energies. Except for the ? orbital, all ethylene-derived bands show significant dispersion (up to 2 eV), but no splitting as would be expected for a structure with two molecules per unit cell. The experimentally determined band structure is reproduced in all details by extended-Hückel-theory calculations for an unsupported ethylene layer. The structural model derived from LEED, ARUPS, and NEXAFS is confirmed both by force field and by the 2D band-structure calculations. This indicates that the adsorbate-adsorbate interactions are essentially decoupled from the adsorbate-substrate interaction, that is responsible for the chemisorption bond.

M. Weinelt; W. Huber; P. Zebisch; H.-P. Steinrück; B. Reichert; U. Birkenheuer; N. Rösch

1992-07-15T23:59:59.000Z

257

X-Band RF Gun Development  

SciTech Connect

In support of the MEGa-ray program at LLNL and the High Gradient research program at SLAC, a new X-band multi-cell RF gun is being developed. This gun, similar to earlier guns developed at SLAC for Compton X-ray source program, will be a standing wave structure made of 5.5 cells operating in the pi mode with copper cathode. This gun was designed following criteria used to build SLAC X-band high gradient accelerating structures. It is anticipated that this gun will operate with surface electric fields on the cathode of 200 MeV/m with low breakdown rate. RF will be coupled into the structure through a final cell with symmetric duel feeds and with a shape optimized to minimize quadrupole field components. In addition, geometry changes to the original gun, operated with Compton X-ray source, will include a wider RF mode separation, reduced surface electric and magnetic fields.

Vlieks, Arnold; Dolgashev, Valery; Tantawi, Sami; /SLAC; Anderson, Scott; Hartemann, Fred; Marsh, Roark; /LLNL, Livermore

2012-06-22T23:59:59.000Z

258

S-Band Loads for SLAC Linac  

SciTech Connect

The S-Band loads on the current SLAC linac RF system were designed, in some cases, 40+ years ago to terminate 2-3 MW peak power into a thin layer of coated Kanthal material as the high power absorber [1]. The technology of the load design was based on a flame-sprayed Kanthal wire method onto a base material. During SLAC linac upgrades, the 24 MW peak klystrons were replaced by 5045 klystrons with 65+ MW peak output power. Additionally, SLED cavities were introduced and as a result, the peak power in the current RF setup has increased up to 240 MW peak. The problem of reliable RF peak power termination and RF load lifetime required a careful study and adequate solution. Results of our studies and three designs of S-Band RF load for the present SLAC RF linac system is discussed. These designs are based on the use of low conductivity materials.

Krasnykh, A.; Decker, F.-J.; /SLAC; LeClair, R.; /INTA Technologies, Santa Clara

2012-08-28T23:59:59.000Z

259

Anomalous Doppler effects in phononic band gaps  

Science Journals Connector (OSTI)

Doppler effects in periodic acoustic media were studied theoretically and experimentally. Analytical formulas are derived using the Green’s function formalism. We found that a far field observer cannot hear the sound inside a band gap from a stationary source, but a moving source can be heard even if the frequency is inside the gap, and the Doppler shifts can be inverted or anomalously large.

Xinhua Hu; Zhihong Hang; Jensen Li; Jian Zi; C. T. Chan

2006-01-30T23:59:59.000Z

260

Permanent magnet focused X-band photoinjector  

DOE Patents (OSTI)

A compact high energy photoelectron injector integrates the photocathode directly into a multicell linear accelerator with no drift space between the injection and the linac. High electron beam brightness is achieved by accelerating a tightly focused electron beam in an integrated, multi-cell, X-band rf linear accelerator (linac). The photoelectron linac employs a Plane-Wave-Transformer (PWT) design which provides strong cell-to-cell coupling, easing manufacturing tolerances and costs.

Yu, David U. L. (Rancho Palos Verdes, CA); Rosenzweig, James (Los Angeles, CA)

2002-09-10T23:59:59.000Z

Note: This page contains sample records for the topic "band axis orientation" 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

Alternating parity bands in 87218Fr  

Science Journals Connector (OSTI)

States in doubly odd 218Fr have been studied using in-beam spectroscopy ?-?-? coincidence techniques mainly through the 209Bi(18O, 2?n) reaction at 94 MeV bombarding energy, using the 8? GASP-ISIS spectrometer at Legnaro. 218Fr shows a band structure, with interleaved states of alternating parities connected by enhanced E1 transitions. Tentative spin assignment and the relation between the structure of 218Fr and its isotone 220Ac is discussed.

M. E. Debray; M. A. Cardona; D. Hojman; A. J. Kreiner; M. Davidson; J. Davidson; H. Somacal; G. Levinton; D. R. Napoli; S. Lenzi; G. de Angelis; M. De Poli; A. Gadea; D. Bazzacco; C. Rossi-Alvarez; N. Medina

2000-07-10T23:59:59.000Z

262

Fabrication of photonic band gap materials  

DOE Patents (OSTI)

A method for forming a periodic dielectric structure exhibiting photonic band gap effects includes forming a slurry of a nano-crystalline ceramic dielectric or semiconductor material and monodisperse polymer microspheres, depositing a film of the slurry on a substrate, drying the film, and calcining the film to remove the polymer microspheres therefrom. The film may be cold-pressed after drying and prior to calcining. The ceramic dielectric or semiconductor material may be titania, and the polymer microspheres may be polystyrene microspheres.

Constant, Kristen (Ames, IA); Subramania, Ganapathi S. (Ames, IA); Biswas, Rana (Ames, IA); Ho, Kai-Ming (Ames, IA)

2002-01-15T23:59:59.000Z

263

The Negative Parity Bands in $^{156}$Gd  

E-Print Network (OSTI)

The high flux reactor of the Institut Laue-Langevin is the world most intense neutron source for research. Using the ultra high-resolution crystal spectrometers GAMS installed at the in-pile target position H6/H7 it is possible to measure nuclear state lifetimes using the Gamma Ray Induced Recoil (GRID) technique. In bent crystal mode, the spectrometers allow to perform spectroscopy with a dynamic range of up to six orders magnitude. At a very well collimated external neutron beam it is possible to install a highly efficient germanium detector array to obtain coincidences and angular correlations. The mentioned techniques were used to study the first two negative parity bands in $^{156}$Gd. These bands have been in the focus of interest since they seem to show signatures of a tetrahedral symmetry. A surprisingly high B(E2) value of about 1000 W.u. for the $4^- \\rightarrow 2^-$ transition was discovered. It indicates that the two first negative parity bands cannot be considered to be signature partners.

Michael Jentschel; Loic Sengele; Dominique Curien; Jerzy Dudek; Florent Haas

2014-04-23T23:59:59.000Z

264

Broad Band Photon Harvesting Biomolecules for Photovoltaics  

E-Print Network (OSTI)

We discuss the key principles of artificial photosynthesis for photovoltaic energy conversion. We demonstrate these principles by examining the operation of the so-called "dye sensitized solar cell" (DSSC) - a photoelectrochemical device which simulates the charge separation process across a nano-structured membrane that is characteristic of natural systems. These type of devices have great potential to challenge silicon semiconductor technology in the low cost, medium efficiency segment of the PV market. Ruthenium charge transfer complexes are currently used as the photon harvesting components in DSSCs. They produce a relatively broad band UV and visible response, but have long term stability problems and are expensive to manufacture. We suggest that a class of biological macromolecules called the melanins may be suitable replacements for the ruthenium complexes. They have strong, broad band absorption, are chemically and photochemically very stable, can be cheaply and easily synthesized, and are also bio-available and bio-compatible. We demonstrate a melanin-based regenerative solar cell, and discuss the key properties that are necessary for an effective broad band photon harvesting system.

P. Meredith; B. J. Powell; J. Riesz; R. Vogel; D. Blake; I. Kartini; G. Will; S. Subianto

2004-06-04T23:59:59.000Z

265

Graduate Assistant Orientation August 21st, 2012  

E-Print Network (OSTI)

, Dean of the Graduate School #12;THE UNH Mission The University of New Hampshire is the state's public-grant charters. #12;CoreValues of UNH Engagement Teaching, research, and public service that make a differenceGraduate Assistant Orientation August 21st, 2012 New Opportunities & New Challenges Harry Richards

New Hampshire, University of

266

Object-oriented programming for the biosciences  

Science Journals Connector (OSTI)

......Ecol. Model., 58(1-4), 55-89. Shin,D.-G., Lee.C, Zhang.J., Rudd.K.E. and Berg,C.M. (1992) Rede- signing, implementing and integrating Eschericia coli genome software tools with an object-oriented database system. Comput......

W. Wiechert; B. Joksch; R. Wittig; A. Hartbrich; T. Höner; M. Möllney

1995-10-01T23:59:59.000Z

267

Object Oriented Artificial Neural Network Implementations  

E-Print Network (OSTI)

1 Object Oriented Artificial Neural Network Implementations W. Curt Lefebvre Jose C. Principe Neuro artificial neural networks (ANNs). The conven- tion for ANN simulation has been a direct implementation to develop a graphical artificial neural network simulation environment motivated towards the pro- cessing

Slatton, Clint

268

Consumption Oriented Free Capitalism Qiudong Wang  

E-Print Network (OSTI)

Consumption Oriented Free Capitalism Qiudong Wang An economic system is a framework, under which people are organized to produce consumption-goods and to consume the produced. Concerning economic of consumption, which in turn not only hindered further improvement of overall productivity, but also threatened

Wang, Quidong

269

The Gator Nation New Faculty Orientation  

E-Print Network (OSTI)

Welcome to The Gator Nation New Faculty Orientation August 14 and 15, 2013 #12;Welcome from Provost.edu/about-us/other-libraries/vet-med-education-center/ Databases ­ http://library.health.ufl.edu/find/databases/ #12;University of Florida Go Gators! Judith C

Pilyugin, Sergei S.

270

New Student Orientation Student Health Service Fee  

E-Print Network (OSTI)

New Student Orientation Fee Student Health Service Fee Student Center Fee Student Comprehensive Fee Registration Fee International Student Service Fee Fall 2014 Spring 2015 $516 $599 Student Teaching Fee Lab Fee Descriptions This is a one-time fee charged to all new undergraduate students in order to support

Firestone, Jeremy

271

Preferred orientation of n-hexane crystallized in silicon nanochannels: A combined x-ray diffraction and sorption isotherm study  

E-Print Network (OSTI)

We present an x-ray diffraction study on n-hexane in tubular silicon channels of approximately 10 nm diameter both as a function of the filling fraction f of the channels and as a function of temperature. Upon cooling, confined n-hexane crystallizes in a triclinic phase typical of the bulk crystalline state. However, the anisotropic spatial confinement leads to a preferred orientation of the confined crystallites, where the crystallographic direction coincides with the long axis of the channels. The magnitude of this preferred orientation increases with the filling fraction, which corroborates the assumption of a Bridgman-type crystallization process being responsible for the peculiar crystalline texture. This growth process predicts for a channel-like confinement an alignment of the fastest crystallization direction parallel to the long channel axis. It is expected to be increasingly effective with the length of solidifying liquid parcels and thus with increasing f. In fact, the fastest solidification front is expected to sweep over the full silicon nanochannel for f=1, in agreement with our observation of a practically perfect texture for entirely filled nanochannels.

Anke Henschel; Pushpendra Kumar; Tommy Hofmann; Klaus Knorr; Patrick Huber

2009-03-19T23:59:59.000Z

272

Neutron Experiment descriptions: N1: Triple-Axis Spectrometers, HFIR HB1A & HB3  

E-Print Network (OSTI)

Neutron Experiment descriptions: N1: Triple-Axis Spectrometers, HFIR HB1A & HB3 Spin wave2A Magnetic structure of NiO Neutron diffraction measurements will be performed to investigate 600K to 288K, using the Neutron Powder Diffractometer at the HFIR. Rietveld analysis of the crystal

Pennycook, Steve

273

Rotation Angle for the Optimum Tracking of One-Axis Trackers  

SciTech Connect

An equation for the rotation angle for optimum tracking of one-axis trackers is derived along with equations giving the relationships between the rotation angle and the surface tilt and azimuth angles. These equations are useful for improved modeling of the solar radiation available to a collector with tracking constraints and for determining the appropriate motor revolutions for optimum tracking.

Marion, W. F.; Dobos, A. P.

2013-07-01T23:59:59.000Z

274

Tilt display demonstration: a display surface with multi-axis tilt & actuation  

Science Journals Connector (OSTI)

This demonstration accompanies a full paper accepted into MobileHCI '12 [1]. We demonstrate a new type of actuatable display, called a Tilt Display, that provides visual feedback combined with multi-axis tilting and vertical actuation. Its ability to ... Keywords: actuated displays, nonplanar surface interaction, physical actuation, tilt displays

Jason Alexander; Andrés Lucero; Sriram Subramanian

2012-09-01T23:59:59.000Z

275

Tilt displays: designing display surfaces with multi-axis tilting and actuation  

Science Journals Connector (OSTI)

We present a new type of actuatable display, called Tilt Displays, that provide visual feedback combined with multi-axis tilting and vertical actuation. Their ability to physically mutate provides users with an additional information channel that facilitates ... Keywords: actuated displays, non-planar surface interaction, physical actuation, tilt displays

Jason Alexander; Andrés Lucero; Sriram Subramanian

2012-09-01T23:59:59.000Z

276

Maximum Feedrate Interpolator for Multi-axis CNC Machining with Jerk Constraints  

E-Print Network (OSTI)

Maximum Feedrate Interpolator for Multi-axis CNC Machining with Jerk Constraints X. Beudaert, S name@lurpa.ens-cachan.fr Abstract A key role of the CNC is to perform the feedrate interpolation which for the next point along the path is computed. Examples and comparisons with an industrial CNC demonstrate

Paris-Sud XI, Université de

277

Journal of Vegetation Science && (2012) Salinity tolerance and the decoupling of resource axis  

E-Print Network (OSTI)

functional trade-offs are present along a gradient of low to high salinity? Location: New York State, USA and salinity gradients at three sites using principal compo- nents, correlation and fourth-corner analysesJournal of Vegetation Science && (2012) Salinity tolerance and the decoupling of resource axis

Fridley, Jason D.

278

MAGNETIC NEUTRON SCATTERING. And Recent Developments in the Triple Axis Spectroscopy  

E-Print Network (OSTI)

Chapter 1 MAGNETIC NEUTRON SCATTERING. And Recent Developments in the Triple Axis Spectroscopy Igor.................................................................................... 2 2. Neutron interaction with matter and scattering cross-section ........ 6 2.1 Basic scattering theory and differential cross-section................ 7 2.2 Neutron interactions and scattering lengths

Johnson, Peter D.

279

A methodology for process parameter selection in five axis laser cladding  

Science Journals Connector (OSTI)

Laser cladding industrial development is becoming an important target for high added value parts manufacturing sectors. Aeronautical or automotive industries are accomplishing great investments in order to understand the process and minimise tuning step costs now paired with. At the moment, the process is applied to three axis or 3 + 2 axis strategies, being numerous works focused on the obtainment of process parameters. All of them try to minimise the number of experimental tests necessary to optimise the great variable involving the process. These variables increase when using laser cladding on five axis kinematics in order to accomplish new targets of industrial sectors which include complex parts with complex surface to clad. The work presents a methodology which helps to choose optimal parameters for five axis laser cladding. A weighted criterion is used in order to discern between different parameters taking into account process requirements. The methodology has been used on two materials and different objectives have been established for the criterion in each one. Finally, two test parts are presented as methodology validation in industrial applications.

Iván Tabernero; Amaia Calleja; Aitzol Lamikiz; Luis Norberto López de Lacalle

2014-01-01T23:59:59.000Z

280

Hydrothermal synthesis, off-axis electron holography and magnetic properties of Fe3O4 nanoparticles  

E-Print Network (OSTI)

-sized Fe3O4 have been prepared by various methods such as sol­ gel processing, hydrothermal synthesisHydrothermal synthesis, off-axis electron holography and magnetic properties of Fe3O4 nanoparticles Jülich, Germany. Abstract. The hydrothermal synthesis of Fe3O4 nanoparticles (NPs) (

Dunin-Borkowski, Rafal E.

Note: This page contains sample records for the topic "band axis orientation" 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

First-order design of off-axis reflective ophthalmic adaptive optics systems using afocal  

E-Print Network (OSTI)

First-order design of off-axis reflective ophthalmic adaptive optics systems using afocal for designing laser cavities, spectrographs and adaptive optics retinal imaging systems. The use, range respectively. This is discussed using examples from adaptive optics retinal imaging systems. The performance

282

Microstructure dependence of the c-axis critical current density in second-generation YBCO tapes.  

SciTech Connect

C-axis current flow in high temperature superconductor (HTS) tape-shaped wires arises in configurations where the local wire axis is not perpendicular to the local magnetic field, such as in power cables with helically wound HTS tapes. The c-axis critical current density J{sub c}{sup c} has been recently found to be orders of magnitude lower than the ab-plane critical current density J{sub c}{sup ab}. Here we report on J{sub c}{sup c} (77 K, sf) values of various YBa{sub 2}Cu{sub 3}O{sub 7}-based (YBCO) tapes with different microstructures. Our results show that the value of J{sub c}{sup c} (77 K, sf) decreases significantly with increasing concentration of ab-plane stacking faults in YBCO thin films and that the critical current anisotropy {gamma} = J{sub c}{sup ab}/J{sub c}{sup c} can reach values as high as 2070, implying that in the highest-anisotropy tape, {approx}20% of the tape width carries c-axis current in a helically wound power cable.

Jia, Y.; Welp, U.; Crabtree, G. W.; Kwok, W. K.; Malozemoff, A. P.; Rupich, M. W.; Fleshler, S.; Clem, J. R. (Materials Science Division); (American Superconductor Corp.); (Ames Lab.); (Iowa State Univ.)

2011-10-01T23:59:59.000Z

283

Origin of a magnetic easy axis in pipeline steel L. Clapham,a)  

E-Print Network (OSTI)

Origin of a magnetic easy axis in pipeline steel L. Clapham,a) C. Heald, T. Krause, and D. L December 1998; accepted for publication 27 April 1999 Oil and gas pipelines are generally magnetically overlooked, the magnetic properties of oil and gas pipelines are an important consideration since the most

Clapham, Lynann

284

On the probability of major-axis precession in triaxial ellipsoidal potentials  

E-Print Network (OSTI)

Orbits in triaxial ellipsoidal potentials precess about either the major or minor axis of the ellipsoid. In standard perturbation theory it can be shown that a circular orbit will precess about the minor axis if its angular momentum vector lies in a region bounded by two great circles which pass through the intermediate axis and which are inclined with minimum separation $i_T$ from the minor axis. We test the accuracy of the standard formula for $i_T$ by performing orbit integrations to determine $i_S$, the simulated turnover angle corresponding to $i_T$. We reach two principal conclusions: (i) $i_S$ is usually greater than $i_T$, by as much as 12 degrees even for moderate triaxialities, $A/1.2

P. A. Thomas; S. Vine; F. R. Pearce

1993-08-09T23:59:59.000Z

285

Multi-Fidelity Uncertainty Quantification: Application to a Vertical Axis Wind Turbine Under an  

E-Print Network (OSTI)

. Introduction Quantifying the response of a wind turbine to an extreme wind gust is an important designMulti-Fidelity Uncertainty Quantification: Application to a Vertical Axis Wind Turbine Under an Extreme Gust A. Santiago Padr´on , Juan J. Alonso and Francisco Palacios Stanford University, Stanford, CA

Alonso, Juan J.

286

Multi-Body Unsteady Aerodynamics in 2D Applied to aVertical-Axis Wind Turbine Using a Vortex Method.  

E-Print Network (OSTI)

?? Vertical axis wind turbines (VAWT) have many advantages over traditional Horizontalaxis wind turbines (HAWT).One of the more severe problem of VAWTs are the complicated… (more)

Österberg, David

2010-01-01T23:59:59.000Z

287

Corn stalk orientation effect on mechanical cutting  

SciTech Connect

Research efforts that increase the efficiency of size reduction of biomass can lead to a significant energy saving. This paper deals with the determination of the effect of sample orientation with respect to cutting element and quantify the possible cutting energy reduction, utilising dry corn stalks as the test material (15%e20% wet basis). To evaluate the mechanical cutting characteristics of corn stalks, a Warnere Bratzler device was modified by replacing its blunt edged cutting element with one having a 30_ single bevel sharp knife edge. Cutting force-deformation characteristics obtained with a universal testing machine were analysed to evaluate the orientation effects at perpendicular (90o), inclined (45o), and parallel (0o) orientations on internodes and nodes for cutting force, energy, ultimate stress, and specific energy of corn stalks. The corn stalks cutting force-displacement characteristics were found to differ with orientation, and internode and node material difference. Overall, the peak failure force, and the total cutting energy of internodes and nodes varied significantly (P < 0.05) with stalk cross-sectional area. The specific energy values (total energy per unit cut area) of dry corn stalk internodes ranged from 11.3 to 23.5 kN m_1, and nodes from 8.6 to 14.0 kN m_1. The parallel orientation (along grain) compared to perpendicular (across grain) produced a significant reduction of the cutting stress and the specific energy to one tenth or better for internodes, and to about one-fifth for nodes.

Igathinathane, C. [Mississippi State University (MSU); Womac, A.R. [University of Tennessee; Sokhansanj, Shahabaddine [ORNL

2010-07-01T23:59:59.000Z

288

A Comparison of Measures-Oriented and Distributions-Oriented Approaches to Forecast Verification  

Science Journals Connector (OSTI)

The authors have carried out verification of 590 12–24-h high-temperature forecasts from numerical guidance products and human forecasters for Oklahoma City, Oklahoma, using both a measures-oriented verification scheme and a distributions-...

Harold E. Brooks; Charles A. Doswell III

1996-09-01T23:59:59.000Z

289

Potential “ways of thinking” about the shear-banding phenomenon  

E-Print Network (OSTI)

Shear-banding is a curious but ubiquitous phenomenon occurring in soft matter. The phenomenological similarities between the shear-banding transition and phase transitions has pushed some researchers to adopt a ‘thermodynamical’ ...

Fardin, M. A.

290

Substrate-Induced Band-Gap Opening in Epitaxial Graphene  

NLE Websites -- All DOE Office Websites (Extended Search)

Substrate-Induced Band-Gap Opening in Epitaxial Graphene Substrate-Induced Band-Gap Opening in Epitaxial Graphene Print Wednesday, 26 March 2008 00:00 Prospective challengers to...

291

A low-temperature sample orienting device for single crystal spectroscopy at the SNS  

SciTech Connect

A low temperature sample orientation device providing three axes of rotation has been successfully built and is in testing for use on several spectrometers at the spallation neutron source (SNS). Sample rotation about the vertical ({omega}) axis of nearly 360{sup o} and out of plane tilts ({phi} and {nu}) of from -3.4{sup o} to 4.4{sup o} and from -2.8{sup o} to 3.5{sup o}, respectively, are possible. An off-the-shelf closed cycle refrigerator (CCR) is mounted on a room temperature sealed rotary flange providing {omega} rotations of the sample. Out-of-plane tilts are made possible by piezoelectric actuated angular positioning devices mounted on the low temperature head of the CCR. Novel encoding devices based on magnetoresistive sensors have been developed to measure the tilt stage angles. This combination facilitates single crystal investigations from room temperature to 3.1 K. Commissioning experiments of the rotating CCR for both powder and single crystal samples have been performed on the ARCS spectrometer at the SNS. For the powder sample this device was used to continuously rotate the sample and thus average out any partial orientation of the powder. The powder rings observed in S(Q) are presented. For the single crystal sample, the rotation was used to probe different regions of momentum transfer (Q-space). Laue patterns obtained from a single crystal sample at two rotation angles are presented.

Bruce, Douglas R [ORNL; Gaulin, Bruce D. [McMaster University; Granroth, Garrett E [ORNL; Roberts II, Charles K [ORNL; Sherline, Todd E [ORNL; Solomon, Landon M [ORNL

2010-01-01T23:59:59.000Z

292

Excitation of Banded Whistler Waves in the Magnetosphere  

SciTech Connect

Banded whistler waves can be generated by the whistler anisotropy instability driven by two bi-Maxwellian electron components with T{sub {perpendicular}}/T{sub {parallel}} > 1 at different T{sub {parallel}} For typical magnetospheric condition of 1 < {omega}{sub e}/{Omega}{sub e} < 5 in regions associated with strong chorus, upper-band waves can be excited by anisotropic electrons below {approx} 1 keV, while lower-band waves are excited by anisotropic electrons above {approx} 10 keV. Lower-band waves are generally field-aligned and substantially electromagnetic, while upper-band waves propagate obliquely and have quasi-electrostatic fluctuating electric fields. The quasi-electrostatic feature of upper-band waves suggests that they may be more easily identified in electric field observations than in magnetic field observations. Upper-band waves are liable to Landau damping and the saturation level of upperband waves is lower than lower-band waves, consistent with observations that lower-band waves are stronger than upper-band waves on average. The oblique propagation, the lower saturation level, and the more severe Landau damping together would make upper-band waves more tightly confined to the geomagnetic equator (|{lambda}{sub m}| < {approx}10{sup o}) than lower-band waves.

Gary, S. Peter [Los Alamos National Laboratory; Liu, Kaijun [Los Alamos National Laboratory; Winske, Dan [Los Alamos National Laboratory

2012-07-13T23:59:59.000Z

293

Coriolis Interaction Between Three Nilsson Bands in Pa  

Science Journals Connector (OSTI)

By comparing new experimental results with calculations, it is shown that the levels above the ½ [5,- 3, 0] ground-state band in Pa233 and Pa231 may be interpreted as resulting from the ½+[6, 6, 0], the 32+[6,5,1], and the 52+[6,4,2] bands involved in a three-band Coriolis interaction.

W. Hoekstra and A. H. Wapstra

1969-04-21T23:59:59.000Z

294

An X-band overmoded relativistic klystron  

SciTech Connect

An X-band overmoded relativistic klystron is proposed, the operation mode of which is the TM{sub 02} mode. The drift tube could not cut off the TM{sub 01} mode; isolating the buncher cavity from the input cavity is achieved by introducing a sectional RF lossy material. Microwaves are extracted from the modulated electron beam using a cylindrical waveguide, rather than a coaxial waveguide; thereby, the output structure is significantly simplified. Particle-in-cell simulations show that microwaves with power of 1.28?GW and frequency of 9.30?GHz can be obtained, corresponding to an efficiency of 32% and relative bandwidth of about 8%.

Xiao, Renzhen; Chen, Changhua; Li, Jiawei; Bai, Xianchen [Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi'an 710024 (China); Deng, Yuqun [Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi'an 710024 (China); Department of Engineering Physics, Tsinghua University, Beijing 100084 (China)

2014-11-15T23:59:59.000Z

295

W-Band Sheet Beam Klystron Design  

SciTech Connect

Sheet beam devices provide important advantages for very high power, narrow bandwidth RF sources like accelerator klystrons [1]. Reduced current density and increased surface area result in increased power capabi1ity, reduced magnetic fields for focusing and reduced cathode loading. These advantages are offset by increased complexity, beam formation and transport issues and potential for mode competition in the ovennoded cavities and drift tube. This paper will describe the design issues encountered in developing a 100 kW peak and 2 kW average power sheet beam k1ystron at W-band including beam formation, beam transport, circuit design, circuit fabrication and mode competition.

Scheitrum, G.; Caryotakis, G.; Burke, A.; Jensen, A.; Jongewaard, E.a Krasnykh, A.; Neubauer, M.; Phillips, R.; Rauenbuehler, K.; /SLAC

2011-11-11T23:59:59.000Z

296

Band Structure of {sup 85}Sr  

SciTech Connect

High spin states in {sup 85}Sr were populated using the reaction {sup 76}Ge({sup 13}C, 4n) at a beam energy of 52 MeV. Gamma-gamma coincidence measurements along with investigation of directional correlation ratios were utilized to establish the extended level scheme upto I{sup {pi}}= (35/2{sup -}). One of the positive parity states observed at 3383.3 keV ((I{sup {pi}}= 19/2{sup (+)}) may be considered as a magnetic rotational ({Delta}I = 1) band, the negative parity states built on 3028.0 level show an irregular behaviour and does not exhibit magnetic rotation.

Kumar, Suresh; Mandal, S. K. [Department of Physics and Astrophysics, University of Delhi, Delhi-110007 (India); Jain, A. K. [Department of Physics, Indian Institute of Technology, Roorkee-247667 (India); Chaturvedi, L. [Guru Ghasidas University, Bilaspur, Chhattisgarh-495009 (India); Sinha, Rishi Kumar [Department of Physics, Banaras Hindu University, Varanasi-221005 (India); Negi, Dinesh; Dhal, Ankul; Kumar, R.; Singh, R. P.; Muralithar, S.; Bhowmik, R. K.; Pancholi, S. C. [Inter University Accelerator Centre, Aruna Asaf Ali Marg, Delhi-110067 (India)

2010-11-24T23:59:59.000Z

297

Ideal Soliton Environment Using Parametric Band Gaps  

Science Journals Connector (OSTI)

Simultaneous solitary wave solutions for laser propagation in nonlinear parametric media with up to ( 3+1) dimensions are proved to exist. The combination of the large dispersion of a Bragg grating and the strong nonlinearity of ?(2) optical material results in stable behavior with short interaction distances and low power requirements. The solutions are obtained by using the effective mass approximation to reduce the coupled propagation equations to those describing a dispersive parametric nonlinear waveguide, and are verified by solving the complete set of coupled band-gap equations numerically.

H. He and P. D. Drummond

1997-06-09T23:59:59.000Z

298

Object-oriented programming and software development: a critical assessment  

Science Journals Connector (OSTI)

In software engineering, object-oriented development is today the most popular programming, design and analysis approach. However, object orientation does not manage to address the needs of today's software construction in as radical and fundamental ...

Manfred Broy

2003-01-01T23:59:59.000Z

299

Client-Oriented Replication in Mobile Database Environments  

E-Print Network (OSTI)

replication service and describe its interfaces using examples. We also discuss a three-tier architecture A Client-Oriented Replication Service 2 2.1 Products and ObjectivesClient-Oriented Replication in Mobile Database Environments Christoph Gollmick Friedrich

300

Using video-oriented instructions to speed up sequence comparison  

Science Journals Connector (OSTI)

......research-article ORIGINAL PAPERS Using video-oriented instructions to speed up sequence...and nucleic sequences, using specialized video instructions. These instructions, SIMD-like...Andrzej.Wozniak@inria.fr Using video-oriented instructions to speed up sequence......

A. Wozniak

1997-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "band axis orientation" 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

Conductivity of Oriented Samaria-Doped Ceria Thin Films Grown...  

NLE Websites -- All DOE Office Websites (Extended Search)

Conductivity of Oriented Samaria-Doped Ceria Thin Films Grown by Oxygen-plasma-assisted Molecular Beam Epitaxy. Conductivity of Oriented Samaria-Doped Ceria Thin Films Grown by...

302

Orientational relaxation and vibrational excitation transfer in methanolcarbon tetrachloride solutions  

E-Print Network (OSTI)

Orientational relaxation and vibrational excitation transfer in methanol­carbon tetrachloride spectroscopy of the hydroxyl stretch of methanol in carbon tetrachloride solutions to study orientational excitation transfer. For concentrated methanol in carbon tetrachloride solu- tions, like those used

Fayer, Michael D.

303

Distributed Tabletops: Territoriality and Orientation in Distributed Collaboration  

E-Print Network (OSTI)

Distributed Tabletops: Territoriality and Orientation in Distributed Collaboration Abstract Previous research has shown that orientation and territory serve key roles during tabletop collaboration. However, no one has yet investigated whether they can play similar roles in distributed collaboration

Robinson, Peter

304

The effects of enforcement on the behavior of citizen band and non-citizen band radio equipped vehicles  

E-Print Network (OSTI)

THE EFFECTS OF ENFORCEMENT ON 1HE BEHAVIOR OF CITIZEN BAND AND NON-CITIZEN BAND RADIO EQUIPPED VEHICLES A Thesis by Donald Ray Harrison Submitted to the Graduate College of Texas ASM University i n partial fulfillment of the requirement... for the degree of MASTER OF SCIENCE May 1978 Major Subject: Industrial Engineering THE EFFECTS OF ENFORCEMENT ON THE BEHAVIOR OF CITIZEN BAND AND NON ? CITIZEN BAND RADIO EQUIPPED VEHICLES A Thesis by DONALD RAY HARRISON Approved as to style and content...

Harrison, Donald Ray

2012-06-07T23:59:59.000Z

305

Imaging Vertically Oriented Defects with Multi-Saft  

Science Journals Connector (OSTI)

Imaging vertically oriented defects using the Synthetic Aperture Focusing Technique (SAFT) requires special consideration. When the faces...

M. Lorenz; U. Stelwagen; A. J. Berkhout

1991-01-01T23:59:59.000Z

306

Digital Ecosystems: Evolving Service-Orientated Architectures  

E-Print Network (OSTI)

A novel optimisation technique inspired by natural ecosystems is presented, where the optimisation works at two levels: a first optimisation, migration of services which are distributed in a decentralised peer-to-peer network, operating continuously in time; this process feeds a second optimisation based on evolutionary computing that operates locally on single peers and is aimed at finding solutions to satisfy locally relevant constraints. Through this twofold process, the local search is accelerated and will yield better local optima, because the distributed optimisation already provides a good sampling of the search space by making use of computations already performed in other peers with similar constraints. We call this new distributed optimisation architecture a Digital Ecosystem, an Ecosystem Orientated Architecture (EOA) created by extending a Service-Oriented Architecture (SOA) with Distributed Evolutionary Computing (DEC). The Digital Ecosystem will allow services to recombine and evolve over time, ...

Briscoe, G

2007-01-01T23:59:59.000Z

307

Service-oriented high level architecture  

E-Print Network (OSTI)

Service-oriented High Level Architecture (SOHLA) refers to the high level architecture (HLA) enabled by Service-Oriented Architecture (SOA) and Web Services etc. techniques which supports distributed interoperating services. The detailed comparisons between HLA and SOA are made to illustrate the importance of their combination. Then several key enhancements and changes of HLA Evolved Web Service API are introduced in comparison with native APIs, such as Federation Development and Execution Process, communication mechanisms, data encoding, session handling, testing environment and performance analysis. Some approaches are summarized including Web-Enabling HLA at the communication layer, HLA interface specification layer, federate interface layer and application layer. Finally the problems of current research are discussed, and the future directions are pointed out.

Wang, Wenguang; Li, Qun; Wang, Weiping; Liu, Xichun

2009-01-01T23:59:59.000Z

308

Building sustainable ecosystem-oriented architectures  

E-Print Network (OSTI)

Currently, organizations are transforming their business processes into e-services and service-oriented architectures to improve coordination across sales, marketing, and partner channels, to build flexible and scalable systems, and to reduce integration-related maintenance and development costs. However, this new paradigm is still fragile and lacks many features crucial for building sustainable and progressive computing infrastructures able to rapidly respond and adapt to the always-changing market and environmental business. This paper proposes a novel framework for building sustainable Ecosystem- Oriented Architectures (EOA) using e-service models. The backbone of this framework is an ecosystem layer comprising several computing units whose aim is to deliver universal interoperability, transparent communication, automated management, self-integration, self-adaptation, and security to all the interconnected services, components, and devices in the ecosystem. Overall, the proposed model seeks to deliver a co...

Bassil, Youssef

2012-01-01T23:59:59.000Z

309

Controlled placement and orientation of nanostructures  

DOE Patents (OSTI)

A method for controlled deposition and orientation of molecular sized nanoelectromechanical systems (NEMS) on substrates is disclosed. The method comprised: forming a thin layer of polymer coating on a substrate; exposing a selected portion of the thin layer of polymer to alter a selected portion of the thin layer of polymer; forming a suspension of nanostructures in a solvent, wherein the solvent suspends the nanostructures and activates the nanostructures in the solvent for deposition; and flowing a suspension of nanostructures across the layer of polymer in a flow direction; thereby: depositing a nanostructure in the suspension of nanostructures only to the selected portion of the thin layer of polymer coating on the substrate to form a deposited nanostructure oriented in the flow direction. By selectively employing portions of the method above, complex NEMS may be built of simpler NEMSs components.

Zettl, Alex K; Yuzvinsky, Thomas D; Fennimore, Adam M

2014-04-08T23:59:59.000Z

310

Sandia National Laboratories Orientation Visit, January 2012  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

1-04 1-04 Site: Sandia National Laboratories Subject: Office of Enforcement and Oversight's Office of Safety and Emergency Management Evaluations Activity Report for the Orientation Visit to the Sandia National Laboratories Dates of Activity : 01/04/2012 Report Preparer: Joseph P. Drago Activity Description/Purpose: The U.S. Department of Energy (DOE) Office of Enforcement and Oversight, within the Office of Health, Safety and Security (HSS), conducted an orientation visit to the Sandia National Laboratories (SNL) and the Sandia Site Office (SSO), Albuquerque, NM, on January 4, 2012, for the HSS site lead. The purpose of the visit was to discuss the nuclear safety oversight strategy, describe the site lead program, increase HSS personnel's operational awareness of the Lab's activities,

311

4056 IEEE SENSORS JOURNAL, VOL. 13, NO. 10, OCTOBER 2013 Design and Characterization of a Soft Multi-Axis  

E-Print Network (OSTI)

4056 IEEE SENSORS JOURNAL, VOL. 13, NO. 10, OCTOBER 2013 Design and Characterization of a Soft Multi-Axis Force Sensor Using Embedded Microfluidic Channels Daniel M. Vogt, Member, IEEE, Yong-Lae Park system. We describe the design, fabrication, and characterization of a novel soft multi-axis force sensor

Park, Yong-Lae

312

Rotational bands with identical transition energies in actinide nuclei  

SciTech Connect

We point out the existence of ground-state rotational bands with identical transition energies (up to spin 8{h bar}) in {sup 240}Pu, {sup 244}Cm, {sup 246}Cm, and {sup 250}Cf. The corresponding transitions in the ground-state bands of {sup 236}U and {sup 238}U have identical energies (within {similar to}2 keV) up to spin 24{h bar}. These features are very similar to those recently observed for superdeformed bands in the mass-150 and mass-190 regions and suggest that the phenomenon of identical bands is not restricted to superdeformed bands.

Ahmad, I.; Carpenter, M.P.; Chasman, R.R.; Janssens, R.V.F.; Khoo, T.L. (Argonne National Laboratory, Argonne, Illinois (USA))

1991-09-01T23:59:59.000Z

313

Aligning Service-Oriented Architectures with Security Requirements  

E-Print Network (OSTI)

Aligning Service-Oriented Architectures with Security Requirements Mattia Salnitri, Fabiano Dalpiaz of a service-oriented architecture-- representing a composite service--with security requirements. Service- oriented architectures are dynamic (services can be replaced on-the-fly), and assessing compliance

314

Intgration oriente service des modles Grid et Multi-Agents  

E-Print Network (OSTI)

/Grid service, Service-oriented architecture, STROBE model, Software engineering, Mixed systems. JFSMA 2006 of a service-oriented approach. The concept of service is clearly at the intersection of GRID and MAS, Interaction, Grid, Intégration agent-Grid, Web/Grid service, Architecture orientée service, modèle STROBE

Paris-Sud XI, Université de

315

SERVICE ORIENTED ARCHITECTURES FOR BUSINESS PROCESS MANAGEMENT SYSTEMS  

E-Print Network (OSTI)

SERVICE ORIENTED ARCHITECTURES FOR BUSINESS PROCESS MANAGEMENT SYSTEMS ABSTRACT The integration of research in the area of Service Oriented Architectures (SOA) with current methodologies and tools of on-going research in the application of Service Oriented Architectures in Business Process Management

Marchese, Maurizio

316

A Service Oriented Architecture Framework for Collaborative Ivar Jrstad  

E-Print Network (OSTI)

A Service Oriented Architecture Framework for Collaborative Services Ivar Jørstad Norwegian with partners and even competitors. The Service Oriented Architecture is a promising distributed computing with a short introduction of the Service Oriented Architecture and then gives a description of collaborative

Dustdar, Schahram

317

Quality-Oriented Design of Services Michael Gebhart, Sebastian Abeck  

E-Print Network (OSTI)

--With the shift to a service-oriented architecture, goals concerning the IT of an organization blocks of the service- oriented architecture, the services, have to be designed that certain quality could be identified, a service within a service- oriented architecture should fulfill. Wide

Abeck, Sebastian

318

Architectural Mismatch in Service-Oriented Architectures Kevin Bierhoff  

E-Print Network (OSTI)

Architectural Mismatch in Service-Oriented Architectures Kevin Bierhoff Institute for Software applications, it has not been applied to Service-Oriented Architectures (SOAs). A major contribution that this and other problems of architectural mismatch are still relevant in developing Service-Oriented Architectures

Grechanik, Mark

319

Towards Relevancy Aware Service Oriented Systems in WSNs  

E-Print Network (OSTI)

--The increasing interest of researchers in service oriented architecture (SOA) for wireless sensor networks (WSNs architecture, Service Management ! 1 INTRODUCTION SERVICE oriented architecture (SOA) for WSNs has received a design factor in service oriented architectures earlier, neither in WSNs nor in the web services

Varela, Carlos

320

Service Oriented Architecture Quality Evaluation Riad Belkhatir1  

E-Print Network (OSTI)

SOAQE Service Oriented Architecture Quality Evaluation Riad Belkhatir1 , Mourad Oussalah1 architectures (CBA) and service oriented architectures (SOA). First developers were quickly aware of code to the evolution of the concerns. These are chronologically, object oriented architectures (OOA), component based

Note: This page contains sample records for the topic "band axis orientation" 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

Towards a Mathematical Foundation for Service-Oriented Applications Design  

E-Print Network (OSTI)

design methodology. Index Terms-- Service Oriented Architecture, Service Ori- ented Applications, ServiceTowards a Mathematical Foundation for Service-Oriented Applications Design Aliaksei Yanchuk.marchese@unitn.it Abstract-- Leveraging service oriented programming par- adigm would significantly affect the way people

Marchese, Maurizio

322

AUTOMATIC PARALLELIZATION OF OBJECT ORIENTED MODELS ACROSS METHOD AND  

E-Print Network (OSTI)

and Modelica Modelica is a rather new language for equation-based object-oriented mathematical modeling which object- oriented modeling languages. Modelica is intended to become a de facto standard. It allowsAUTOMATIC PARALLELIZATION OF OBJECT ORIENTED MODELS ACROSS METHOD AND SYSTEM HÃ¥kan Lundvall

Zhao, Yuxiao

323

ORIGINAL PAPER Peacocks orient their courtship displays towards the sun  

E-Print Network (OSTI)

ORIGINAL PAPER Peacocks orient their courtship displays towards the sun Roslyn Dakin & Robert on male orientation relative to the position of the sun. During the "wing-shaking" display, females were generally behind the displaying male, and male orientation with respect to the position of the sun

Montgomerie, Bob

324

Action-Oriented Benchmarking: Concepts and Tools  

SciTech Connect

Most energy benchmarking tools provide static feedback on how one building compares to a larger set of loosely similar buildings, without providing information at the end-use level or on what can be done to reduce consumption, cost, or emissions. In this article--Part 1 of a two-part series--we describe an 'action-oriented benchmarking' approach, which extends whole-building energy benchmarking to include analysis of system and component energy use metrics and features. Action-oriented benchmarking thereby allows users to generate more meaningful metrics and to identify, screen and prioritize potential efficiency improvements. This opportunity assessment process can then be used to inform and optimize a full-scale audit or commissioning process. We introduce a new web-based action-oriented benchmarking system and associated software tool-EnergyIQ. The benchmarking methods, visualizations, and user interface design are informed by an end-user needs assessment survey and best-practice guidelines from ASHRAE.

California Energy Commission; Mathew, Paul; Mills, Evan; Mathew, Paul; Piette, Mary Ann; Bourassa, Norman; Brook, Martha

2008-02-13T23:59:59.000Z

325

Security in Service?oriented Grid  

Science Journals Connector (OSTI)

Service?oriented architecture (SOA) is the most common used approach for building architectural decisions of a system. SOA is an architectural model for developing reliable distributed systems which functionality is provided as services. Features from this approach are services’ interoperability loose?coupling reusability and discoverability. Grid is a new technology for using computers network and devices. The Grid is infrastructure for coordinate use of distributed resources shared by different institutes computational centers and organizations. Grid is dynamic and heterogeneous system beyond any institutional or organization boundaries. Considering this the development and integration of Gird application in such dynamic and heterogeneous environment is a great challenge. Something more developing of Grid application is still tightly related with the underlying middleware and its security. Service?oriented Grids are one step further in integration of Grid application because of the SOA features. These benefits from Grid and SOA however will require and new security approaches for building application. In this article we will briefly describe some known security approaches in SOA and Grid and how they are applied in security models of two well known service?oriented grid architectures—OGSA and EGA.

R. Goranova

2008-01-01T23:59:59.000Z

326

ANL/APS/TB-32 Test of Horizontal Field Measurements Using Two-Axis Hall  

NLE Websites -- All DOE Office Websites (Extended Search)

2 2 Test of Horizontal Field Measurements Using Two-Axis Hall Probes at the APS Magnetic Measurement Facility I. Vasserman Advanced Photon Source Argonne National Laboratory Argonne, IL 60439 1. Introduction The free-electron laser (FEL) project at the Advanced Photon Source (APS) will use a 400-MeV particle beam from the APS linac with RMS beam transverse size of 100 µm and requires very high performance of the insertion devices in order to achieve high intensity radiation. Averaged over period, the trajectory must deviate from the ideal on-axis trajectory by not more than 10% of the RMS beam size. Meaning that the second field integral should be straight within ±1300 G-cm 2 over the length of the device for both horizontal and vertical directions for the 400-MeV particle

327

Easy axis alignment of chemically partially ordered FePt nanoparticles  

SciTech Connect

Partially ordered Fe{sub 53}Pt{sub 47} nanoparticles with size around 8 nm were prepared by the simultaneous decomposition of iron pentacarbonyl and platinum acetylacetonate. The high boiling point chemical, hexadecylamine, was used as a solvent, and 1-adamantanecarboxylic acid was used as a stabilizer. X-ray diffraction measurements reveal that as-made FePt particles were partially transformed into the ordered L1{sub 0} phase with some weak superlattice peaks. The room-temperature hysteresis loop and remanence curve suggest a broad distribution of anisotropies in the partially ordered particles. By coating the partially ordered FePt nanoparticles with a polyvinylchloride polymer binder, the particles could be re-dispersed in cyclohexanone. Furthermore, the easy axis of the particles coated with the polyvinylchloride polymer binder could be aligned under an external field. Easy axis alignment was confirmed from both alternating gradient magnetometer and x-ray diffraction measurements.

Kang, Shishou; Jia Zhiyong; Shi, Shifan; Nikles, David E.; Harrell, J.W. [Center for Materials for Information Technology, University of Alabama, Tuscaloosa, Alabama 35487-0209 (United States)

2005-02-07T23:59:59.000Z

328

Axi-symmetrical flow reactor for [sup 196]Hg photochemical enrichment  

DOE Patents (OSTI)

The present invention is directed to an improved photochemical reactor useful for the isotopic enrichment of a predetermined isotope of mercury, especially, [sup 196]Hg. Specifically, two axi-symmetrical flow reactors were constructed according to the teachings of the present invention. These reactors improve the mixing of the reactants during the photochemical enrichment process, affording higher yields of the desired [sup 196]Hg product. Measurements of the variation of yield (Y) and enrichment factor (E) along the flow axis of these reactors indicates very substantial improvement in process uniformity compared to previously used photochemical reactor systems. In one preferred embodiment of the present invention, the photoreactor system was built such that the reactor chamber was removable from the system without disturbing the location of either the photochemical lamp or the filter employed therewith. 10 figures.

Grossman, M.W.

1991-04-30T23:59:59.000Z

329

Lattice Boltzmann method for heat diffusion in axis-symmetric geometries  

Science Journals Connector (OSTI)

Lattice Boltzmann Methods (LBM) have been used to solve momentum, heat and mass transport equations mainly in Cartesian coordinate system. In the present work, the LBM is extended to solve transports in axis-symmetric geometries, such as pipes and spheres. Heat diffusion and conduction in solids without and with heat generation were tested. The heat diffusion equation for axis-symmetric problem is reduced to diffusion equation as in Cartesian coordinate with an extra term due to the surface area variation along the radial direction. The extra term is treated as a source term (forcing term) in LBM. The extra term can be approximated by using finite difference or more accurately as a flux term. The results predicted by LBM are well compared with analytical solutions and finite volume method.

A.A. Mohamad

2009-01-01T23:59:59.000Z

330

Virtual machining considering dimensional, geometrical and tool deflection errors in three-axis CNC milling machines  

Science Journals Connector (OSTI)

Abstract Virtual manufacturing systems can provide useful means for products to be manufactured without the need of physical testing on the shop floor. As a result, the time and cost of part production can be decreased. There are different error sources in machine tools such as tool deflection, geometrical deviations of moving axis and thermal distortions of machine tool structures. Some of these errors can be decreased by controlling the machining process and environmental parameters. However other errors like tool deflection and geometrical errors which have a big portion of the total error, need more attention. This paper presents a virtual machining system in order to enforce dimensional, geometrical and tool deflection errors in three-axis milling operations. The system receives 21 dimensional and geometrical errors of a machine tool and machining codes of a specific part as input. The output of the system is the modified codes which will produce actual machined part in the virtual environment.

Mohsen Soori; Behrooz Arezoo; Mohsen Habibi

2014-01-01T23:59:59.000Z

331

An Einstein-Hilbert Action for Axi-Dilaton Gravity in 4-Dimensions  

E-Print Network (OSTI)

We examine the axi-dilatonic sector of low energy string theory and demonstrate how the gravitational interactions involving the axion and dilaton fields may be derived from a geometrical action principle involving the curvature scalar associated with a non-Riemannian connection. In this geometry the antisymmetric tensor 3-form field determines the torsion of the connection on the frame bundle while the gradient of the metric is determined by the dilaton field. By expressing the theory in terms of the Levi-Civita connection associated with the metric in the ``Einstein frame'' we confirm that the field equations derived from the non-Riemannian Einstein-Hilbert action coincide with the axi-dilaton sector of the low energy effective action derived from string theory.

T Dereli; Robin W Tucker

1995-02-08T23:59:59.000Z

332

Magnetic axis safety factor of finite $\\beta$ spheromaks and transition from spheromaks to toroidal magnetic bubbles  

E-Print Network (OSTI)

The value of the safety factor on the magnetic axis of a finite-beta spheromak is shown to be a function of beta in contrast to what was used in P. M. Bellan, Phys. Plasmas 9, 3050 (2002); this dependence on beta substantially reduces the gradient of the safety factor compared to the previous calculation. The method for generating finite-beta spheromak equilibria is extended to generate equilibria describing toroidal magnetic "bubbles" where the hydrodynamic pressure on the magnetic axis is less than on the toroid surface. This "anti-confinement" configuration can be considered an equilibrium with an inverted beta profile and is relevant to interplanetary magnetic clouds as these clouds have lower hydrodynamic pressure in their interior than on their surface.

Bellan, Paul M

2015-01-01T23:59:59.000Z

333

High efficiency off-axis current drive by high frequency fast waves  

SciTech Connect

Modeling work shows that current drive can be done off-axis with high efficiency, as required for FNSF and DEMO, by using very high harmonic fast waves (“helicons” or “whistlers”). The modeling indicates that plasmas with high electron beta are needed in order for the current drive to take place off-axis, making DIII-D a highly suitable test vehicle for this process. The calculations show that the driven current is not very sensitive to the launched value of n{sub ?}, a result that can be understood from examination of the evolution of n{sub ?} as the waves propagate in the plasma. Because of this insensitivity, relatively large values (?3) of n{sub ?} can be launched, thereby avoiding some of the problems with mode conversion in the boundary found in some previous experiments. Use of a traveling wave antenna provides a very narrow n{sub ?} spectrum, which also helps avoid mode conversion.

Prater, R.; Pinsker, R. I.; Moeller, C. P. [General Atomics, PO Box 85608, San Diego, California 92186-5608 (United States); Porkolab, M.; Vdovin, V. [Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts 02139 (United States)

2014-02-12T23:59:59.000Z

334

Contour Charts of SOFAR Speed and Axis Depth in the Pacific Ocean  

Science Journals Connector (OSTI)

Sound speeds calculated from the physical properties of sea water as measured at hydrographic stations were used to construct contour charts of SOFAR?speed and SOFAR?axis depth for the Pacific Ocean. Wilson's formula was used for the calculation of speed. Data were averaged for 1° squares plotted and smooth contours were drawn manually. Speeds averaged along great?circle paths are compared with those measured for explosions. The charts show steep gradients along the Antarctic convergence and at the convergence of the Oyashio and Kuroshio extension. The region of highest speed as well as greatest axis depth was that extending eastward from Australia to about the 150°W. The charts are used in a program for calculating source coordinates of earthquakeT phases.

Rockne H. Johnson; Roger A. Norris

1967-01-01T23:59:59.000Z

335

Floating axis wind turbines for offshore power generation—a conceptual study  

Science Journals Connector (OSTI)

The cost of energy produced by offshore wind turbines is considered to be higher than land based ones because of the difficulties in construction, operation and maintenance on offshore sites. To solve the problem, we propose a concept of a wind turbine that is specially designed for an offshore environment. In the proposed concept, a floater of revolutionary shape supports the load of the wind turbine axis. The floater rotates with the turbine and the turbine axis tilts to balance the turbine thrust, buoyancy and gravity. The tilt angle is passively adjustable to wind force. The angle is 30° at rated power. The simplicity of the system leads to further cost reduction of offshore power generation.

Hiromichi Akimoto; Kenji Tanaka; Kiyoshi Uzawa

2011-01-01T23:59:59.000Z

336

The experimental and theoretical investigaton of a horizontal-axis wind turbine  

E-Print Network (OSTI)

. Chevalier An experimental and theoretical investigation of a horizontal-axis wind energy conversion device utilizing straight blades as the force- producing surfaces was conducted. The blades were mounted horizontally between two rotating discs and were... positioned with a mechanical cern system to produce the maximum torque at every point around the revolution. The wind turbine was tested in a 7 x 10 ft low speed wind tunnel. The device converted over 20 percent of the energy available in the wind...

Milburn, Robert Terrance

2012-06-07T23:59:59.000Z

337

Method and apparatus for maintaining equilibrium in a helical axis stellarator  

DOE Patents (OSTI)

Apparatus for maintaining three-dimensional MHD equilibrium in a plasma contained in a helical axis stellarator includes a resonant coil system, having a configuration such that current therethrough generates a magnetic field cancelling the resonant magnetic field produced by currents driven by the plasma pressure on any given flux surface resonating with the rotational transform of another flux surface in the plasma. Current through the resonant coil system is adjusted as a function of plasma beta.

Reiman, A.; Boozer, A.

1984-10-31T23:59:59.000Z

338

Method and apparatus for maintaining equilibrium in a helical axis stellarator  

DOE Patents (OSTI)

Apparatus for maintaining three-dimensional MHD equilibrium in a plasma contained in a helical axis stellerator includes a resonant coil system, having a configuration such that current therethrough generates a magnetic field cancelling the resonant magnetic field produced by currents driven by the plasma pressure on any given flux surface resonating with the rotational transform of another flux surface in the plasma. Current through the resonant coil system is adjusted as a function of plasma beta.

Reiman, Allan (Princeton, NJ); Boozer, Allen (Rocky Hill, NJ)

1987-01-01T23:59:59.000Z

339

Intrinsic surface band bending in Cu{sub 3}N(100) ultrathin films  

SciTech Connect

Highly homogeneous, ultrathin films of copper nitride (Cu{sub 3}N) have been grown on Fe(001) at room temperature using a Cu evaporator and a radio-frequency plasma source to obtain atomic nitrogen in a UHV environment. Cu{sub 3}N is a semiconductor with the valence band edge at -0.65{+-}0.05 eV below the Fermi Level. The formation of copper nitride can be detected spectroscopically by the shape of the Cu LVV-Auger electron transition, which changes sensibly in shape and position compared to metallic Cu. Cu{sub 3}N grows epitaxially with the substrate forming flat disklike mosaic blocks (001) oriented. Both x-ray core level photoelectron spectroscopy and ultraviolet photoelectron spectroscopy photoemission experiments have been used to study the electronic structure. A first-principles calculation has been performed and compared with the measured spectra.

Navio, C.; Alvarez, J.; Yndurain, F.; Miranda, R. [Departamento de Fisica de la Materia Condensada e Instituto de Ciencia de Materiales Nicolas Cabrera, Universidad Autonoma de Madrid, Cantoblanco, 28049 Madrid (Spain); Capitan, M. J. [Instituto de Estructura de la Materia-CSIC, c/Serrano 119, 28006 Madrid (Spain)

2007-08-15T23:59:59.000Z

340

Eastern Band of Cherokee Strategic Energy Plan  

SciTech Connect

The Eastern Band of Cherokee Indians was awarded a grant under the U.S. Department of Energy Tribal Energy Program (TEP) to develop a Tribal Strategic Energy Plan (SEP). The grant, awarded under the “First Steps” phase of the TEP, supported the development of a SEP that integrates with the Tribe’s plans for economic development, preservation of natural resources and the environment, and perpetuation of Tribal heritage and culture. The Tribe formed an Energy Committee consisting of members from various departments within the Tribal government. This committee, together with its consultant, the South Carolina Institute for Energy Studies, performed the following activities: • Develop the Tribe’s energy goals and objectives • Establish the Tribe’s current energy usage • Identify available renewable energy and energy efficiency options • Assess the available options versus the goals and objectives • Create an action plan for the selected options

Souther Carolina Institute of energy Studies-Robert Leitner

2009-01-30T23:59:59.000Z

Note: This page contains sample records for the topic "band axis orientation" 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

Wide band stepped frequency ground penetrating radar  

DOE Patents (OSTI)

A wide band ground penetrating radar system (10) embodying a method wherein a series of radio frequency signals (60) is produced by a single radio frequency source (16) and provided to a transmit antenna (26) for transmission to a target (54) and reflection therefrom to a receive antenna (28). A phase modulator (18) modulates those portion of the radio frequency signals (62) to be transmitted and the reflected modulated signal (62) is combined in a mixer (34) with the original radio frequency signal (60) to produce a resultant signal (53) which is demodulated to produce a series of direct current voltage signals (66) the envelope of which forms a cosine wave shaped plot (68) which is processed by a Fast Fourier Transform unit 44 into frequency domain data (70) wherein the position of a preponderant frequency is indicative of distance to the target (54) and magnitude is indicative of the signature of the target (54).

Bashforth, Michael B. (Buellton, CA); Gardner, Duane (Santa Maria, CA); Patrick, Douglas (Santa Maria, CA); Lewallen, Tricia A. (Ventura, CA); Nammath, Sharyn R. (Santa Barbara, CA); Painter, Kelly D. (Goleta, CA); Vadnais, Kenneth G. (Alexandria, VA)

1996-01-01T23:59:59.000Z

342

Orientation and alignment effects in electron-induced ionization of a single oriented water molecule  

SciTech Connect

We here report a theoretical study about the orientation effect on the total ionization cross sections for a single oriented water molecule. The theoretical description of the ionization process is performed within the first Born framework with a collisional system including an initial state composed of a projectile and a water target molecule described by a plane wave and an accurate one-center molecular wave function, respectively, and a final state constituted by a slow ejected electron represented by a Coulomb wave and a scattered (fast) electron projectile described by a plane wave. Secondary electron energetic distributions as well as total cross sections are then compared for particular target configurations pointing out strong alignment and orientation effects on the description of the ionization process.

Champion, C. [Laboratoire de Physique Moleculaire et des Collisions, ICPMB (FR CNRS 2843), Universite Paul Verlaine-Metz, 1 boulevard Arago, F-57078 Metz Cedex 3 (France); Rivarola, R. D. [Instituto de Fisica Rosario, CONICET and Universidad Nacional de Rosario, Avenida Pellegrini 250, 2000 Rosario (Argentina)

2010-10-15T23:59:59.000Z

343

The Origin of the Mercury Bands at 2480A  

Science Journals Connector (OSTI)

The group of eight mercury bands near 2480A was photographed under varied excitation conditions with the purpose of determining their origin. The source was a discharge through mercury vapor produced in a quartz tube through external electrodes by a low-voltage Tesla coil. Five tubes containing distilled mercury and commercial mercury arc lamp showed this group of bands. These bands were weakened by heat along with known mercury bands. The origin is undoubtedly some form of mercury molecule. The most probable forms are Hg2+ and Hg2. Five observations favor Hg2+ over Hg2. (1) These bands have never been observed in fluorescence. (2) The 2476 band is more intense than the 2345 Hg2 band under strong field excitation but weaker than 2345 under low field excitation. (3) No other bands with properties like those of the 2480 group have been observed in the mercury spectrum and Rayleigh has shown that these bands do not occur in absorption. (4) The bands in this group may be classified as sequences v?-v??=0±1±2±3, and a lower limit for D of 0.3 volts estimated. (5) In the v?-v??=0 sequence, emission is observed from state v?=41 indicating molecules with very high vibrational energy. This energy may be supplied by the electric field if the emitter is an ion but not if it is a neutral molecule.

J. Gibson Winans

1932-12-15T23:59:59.000Z

344

Biomimetic processing of oriented crystalline ceramic layers  

SciTech Connect

The aim of this project was to develop the capabilities for Sandia to fabricate self assembled Langmuir-Blodgett (LB) films of various materials and to exploit their two-dimensional crystalline structure to promote the growth of oriented thin films of inorganic materials at room temperature. This includes the design and synthesis of Langmuir-active (amphiphilic) organic molecules with end groups offering high nucleation potential for various ceramics. A longer range goal is that of understanding the underlying principles, making it feasible to use the techniques presented in this report to fabricate unique oriented films of various materials for electronic, sensor, and membrane applications. Therefore, whenever possible, work completed in this report was completed with the intention of addressing the fundamental phenomena underlying the growth of crystalline, inorganic films on template layers of highly organized organic molecules. This problem was inspired by biological processes, which often produce exquisitely engineered structures via templated growth on polymeric layers. Seashells, for example, exhibit great toughness owing to their fine brick-and-mortar structure that results from templated growth of calcium carbonate on top of layers of ordered organic proteins. A key goal in this work, therefore, is to demonstrate a positive correlation between the order and orientation of the template layer and that of the crystalline ceramic material grown upon it. The work completed was comprised of several parallel efforts that encompassed the entire spectrum of biomimetic growth from solution. Studies were completed on seashells and the mechanisms of growth for calcium carbonate. Studies were completed on the characterization of LB films and the capability developed for the in-house fabrication of these films. Standard films of fatty acids were studied as well as novel polypeptides and porphyrins that were synthesized.

Cesarano, J.; Shelnutt, J.A.

1997-10-01T23:59:59.000Z

345

BUSCA A Telescope Instrumentation for Simultaneous Imaging in 4 Optical Bands  

E-Print Network (OSTI)

The "Bonn University Simultaneous CAmera" (BUSCA) is a CCD camera system which allows simultaneous direct imaging of the same sky area in four colors. The optics are designed for an f/8 beam and four 4Kx4K CCDs with 15m pixels covering a field of view of 12 arcmin x 12 arcmin at a 2m class telescope. In September 1998 BUSCA has seen "First Light". The instrument is based on three dichroic beam splitters which separate optical wavelength bands such (at 430nm, 540nm, 730nm) that standard astronomical intermediate-band filter systems can be used. The dichroics are made of plane-parallel glass plates mounted at an angle of 45 degrees. Astigmatism in the transmitted beams (f/8) is completely cancelled by identical plane-parallel glass plates of suitable orientation. BUSCA offers new perspectives in astronomical multicolor photometry: i) The broadband spectral properties (e.g. color indices) of astronomical objects in the optical can be determined with high reliability even in non-photometric atmospheric conditions...

Reif, K; De Boer, K S; Schmoll, J; Müller, P; Poschmann, H; Klink, G; Kohley, R; Heber, U; Mebold, U; Mueller, Ph.

1999-01-01T23:59:59.000Z

346

Lifetime measurements of Triaxial Strongly Deformed bands in $^{163}$Tm  

E-Print Network (OSTI)

With the Doppler Shift Attenuation Method, quadrupole transition moments, $Q_t$, were determined for the two recently proposed Triaxial Strongly Deformed (TSD) bands in $^{163}$Tm. The measured $Q_t$ moments indicate that the deformation of these bands is larger than that of the yrast, signature partners. However, the measured values are smaller than those predicted by theory. This observation appears to be valid for TSD bands in several nuclei of the region

X. wang; R. V. F. Janssens; E. F. Moore; U. Garg; Y. Gu; S. Frauendorf; M. P. Carpenter; S. S. Ghugre; N. J. Hammond; T. Lauritsen; T. Li; G. Mukherjee; N. S. Pattabiraman; D. Seweryniak; S. Zhu

2007-05-14T23:59:59.000Z

347

Determining orientation and direction of DNA sequences  

DOE Patents (OSTI)

Determining orientation and direction of DNA sequences. A method by which fluorescence in situ hybridization can be made strand specific is described. Cell cultures are grown in a medium containing a halogenated nucleotide. The analog is partially incorporated in one DNA strand of each chromatid. This substitution takes place in opposite strands of the two sister chromatids. After staining with the fluorescent DNA-binding dye Hoechst 33258, cells are exposed to long-wavelength ultraviolet light which results in numerous strand nicks. These nicks enable the substituted strand to be denatured and solubilized by heat, treatment with high or low pH aqueous solutions, or by immersing the strands in 2.times.SSC (0.3M NaCl+0.03M sodium citrate), to name three procedures. It is unnecessary to enzymatically digest the strands using Exo III or another exonuclease in order to excise and solubilize nucleotides starting at the sites of the nicks. The denaturing/solubilizing process removes most of the substituted strand while leaving the prereplication strand largely intact. Hybridization of a single-stranded probe of a tandem repeat arranged in a head-to-tail orientation will result in hybridization only to the chromatid with the complementary strand present.

Goodwin, Edwin H. (Los Alamos, NM); Meyne, Julianne (Los Alamos, NM)

2000-01-01T23:59:59.000Z

348

Engineering the Electronic Band Structure for Multiband Solar Cells  

Science Journals Connector (OSTI)

Using the unique features of the electronic band structure of GaNxAs1-x alloys, we have designed, fabricated and tested a multiband photovoltaic device. The device demonstrates an optical activity of three energy bands that absorb, and convert into electrical current, the crucial part of the solar spectrum. The performance of the device and measurements of electroluminescence, quantum efficiency and photomodulated reflectivity are analyzed in terms of the band anticrossing model of the electronic structure of highly mismatched alloys. The results demonstrate the feasibility of using highly mismatched alloys to engineer the semiconductor energy band structure for specific device applications.

N. López; L. A. Reichertz; K. M. Yu; K. Campman; W. Walukiewicz

2011-01-10T23:59:59.000Z

349

Properties of the rotational bands in {sup 161}Er  

SciTech Connect

High-spin states in {sup 161}Er have been studied experimentally using the {sup 150}Nd({sup 16}O,5n) reaction at a beam energy of 86 MeV. The 5/2{sup +}[642], 3/2{sup -}[521], and 11/2{sup -}[505] bands are extended up to high-spin states, and particularly the {alpha}=-1/2 branch of the ground state 3/2{sup -}[521] band is revised significantly. The relatively enhanced E1 transitions from the 3/2{sup -}[521] band to the 5/2{sup +}[642] band are observed. The band properties are analyzed within the framework of a triaxial particle-rotor model, and near-prolate shape and triaxial deformation are proposed to the 3/2{sup -}[521] and 5/2{sup +}[642] bands, respectively. Signature inversion occurs in the 3/2{sup -}[521] band after the band crossing in {sup 161}Er, and the systematics of the signature inversion associated with the 3/2{sup -}[521] configuration are discussed. By analyzing the properties of the relatively enhanced E1 transitions, it is found that the R(E1/E2) values show angular momentum dependence before the band crossing, and these enhanced E1 transitions could be attributed to octupole softness.

Chen, L.; Zhou, X. H.; Wang, S. T.; Zhang, N. T.; Zhou, H. B.; Li, G. S.; Wang, H. X.; Ding, B. [Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 (China); Graduate University of Chinese Academy of Sciences, Beijing 100049 (China); Zhang, Y. H.; Zheng, Y.; Liu, M. L.; Ma, F.; Fang, Y. D.; Hua, W.; Guo, S.; Qiang, Y. H.; Lei, X. G.; Guo, Y. X. [Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 (China); Zhu, L. H.; Wu, X. G. [China Institute of Atomic Energy, Beijing 102413 (China)

2011-03-15T23:59:59.000Z

350

Substrate-Induced Band-Gap Opening in Epitaxial Graphene  

NLE Websites -- All DOE Office Websites (Extended Search)

Substrate-Induced Band-Gap Opening in Epitaxial Graphene Print Prospective challengers to silicon, the long-reigning king of semiconductors for computer chips and other electronic...

351

ARM - Radiative Heating in Underexplored Bands Campaign-II (RHUBC...  

NLE Websites -- All DOE Office Websites (Extended Search)

Eli Mlawer, Principal Investigator Dave Turner, Principal Investigator Radiative Heating in Underexplored Bands Campaign-II (RHUBC-II) At an elevation of more than 5000...

352

ARM - Radiative Heating in Underexplored Bands Campaign (RHUBC...  

NLE Websites -- All DOE Office Websites (Extended Search)

Contacts News ARM Press Release (Feb. 26, 2007) Images flickrdots Radiative Heating in Underexplored Bands Campaign (RHUBC) Now available: RHUBC-II website Between...

353

Method for Creating Photonic Band Gap Materials - Energy Innovation...  

NLE Websites -- All DOE Office Websites (Extended Search)

a photonic band gap. These microstructures have the potential to change the way optoelectronic devices, such as photodiodes, LEDs, and integrated optical circuit elements, are...

354

Engineering the Electronic Band Structure for Multiband Solar Cells  

SciTech Connect

Using the unique features of the electronic band structure of GaNxAs1-x alloys, we have designed, fabricated and tested a multiband photovoltaic device. The device demonstrates an optical activity of three energy bands that absorb, and convert into electrical current, the crucial part of the solar spectrum. The performance of the device and measurements of electroluminescence, quantum efficiency and photomodulated reflectivity are analyzed in terms of the Band Anticrossing model of the electronic structure of highly mismatched alloys. The results demonstrate the feasibility of using highly mismatched alloys to engineer the semiconductor energy band structure for specific device applications.

Lopez, N.; Reichertz, L.A.; Yu, K.M.; Campman, K.; Walukiewicz, W.

2010-07-12T23:59:59.000Z

355

Measurement of the rotational transform at the axis of a tokamak  

Science Journals Connector (OSTI)

Measurements of the internal magnetic field structure of Texas Experimental Tokamak discharges are made by use of laser-induced fluorescence of an injected Li0 beam. From measurements near the magnetic axis, we obtain the axial safety factor, q0 (or equivalently the rotational transform, ?=2?/q) for various discharge conditions. In particular, for low-qa sawtoothing discharges, we find time-averaged values of q0 significantly less than 1 (?0.7 to 0.8), in contrast with models used to describe the nonlinear internal relaxation process commonly known as sawteeth.

W. P. West; D. M. Thomas; J. S. deGrassie; S. B. Zheng

1987-06-29T23:59:59.000Z

356

A Large Liquid Argon TPC for Off-axis NuMI Neutrino Physics  

SciTech Connect

The ICARUS collaboration has shown the power of the liquid argon time projection chamber (LArTPC) technique to image events with bubble-chamber-like quality. I will describe a proposed long-baseline {nu}e appearance experiment utilizing a large ({>=} 15 kton1) LArTPC placed off-axis of Fermilab's NuMI {nu}{mu} beam. The total LArTPC program as it presently stands, which includes a number of smaller R and D projects designed to examine the key design issues, will be outlined.

Menary, Scott [York University, Toronto (Canada)

2006-07-11T23:59:59.000Z

357

Solutions for Neutral for Axi-Dilaton Gravity in 4-Dimensions  

E-Print Network (OSTI)

We examine a 1 parameter class of actions describing the gravitational interaction between a pair of scalar fields and Einsteinian gravitation. When the parameter is positive the theory corresponds to an axi-dilatonic sector of low energy string theory. We exploit an SL(2,R) symmetry of the theory to construct a family of electromagnetically neutral solutions with non-zero axion and dilaton charge from solutions of the Brans-Dicke theory. We also comment on solutions to the theory with negative coupling parameter.

T Dereli; M Onder; Robin W Tucker

1995-02-08T23:59:59.000Z

358

Seismic reflection images of a near-axis melt sill within the lower crust at the Juan de Fuca ridge  

Science Journals Connector (OSTI)

... -axis seamounts with chemistry distinct from the axial lavas (Fig. 4a). Observations by submersible vehicles have also reported the presence of low-temperature hydrothermal venting ?3.3?km ... ratio is 0.25. Reflection coefficients

J. Pablo Canales; Mladen R. Nedimovi?; Graham M. Kent; Suzanne M. Carbotte; Robert S. Detrick

2009-07-02T23:59:59.000Z

359

Environmental and Performance Analysis of a 5kW Horizontal Axis Wind Turbine in East Central Alberta.  

E-Print Network (OSTI)

??This thesis investigates the environmental and performance results of a 5kW horizontal axis wind turbine installed in east-central Alberta. Life cycle assessment (LCA) methodology was… (more)

Rooke, Braden

2012-01-01T23:59:59.000Z

360

Multi-axis compliant mechanism-based nanopositioner for multi-mode mechanical testing of carbon nanotubes  

E-Print Network (OSTI)

This thesis documents the design of a multi-axis nanopositioner that addresses a need for carbon nanotube (CNT) instrumentation that is capable of multiple modes of mechanical testing. This nanopositioner is a solution to ...

Lin, Kevin, S.M. Massachusetts Institute of Technology

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "band axis orientation" 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

Dynamics of a horizontal cylinder oscillating as a wave energy converter about an off-centred axis  

E-Print Network (OSTI)

The hydrodynamic properties of a horizontal cylinder which is free to pitch about an off-centred axis are studied and used to derive the equations of motion of a wave energy converter which extracts energy from incoming ...

Lucas, Jorge

2011-11-22T23:59:59.000Z

362

Simultaneous two-axis vibration measurement of a nonmetallic cylinder by electromagnetic induction and metallic foil loops  

Science Journals Connector (OSTI)

This work presents a method based on electromagnetic induction for the simultaneous non-contact measurement of two-axis lateral vibrations of a nonmetallic cylinder. The suggested method ... pair of loop is induc...

Soon Woo Han; Jin Ki Kim; Yoon Young Kim

2011-08-01T23:59:59.000Z

363

Feed rate calculation algorithm for the homogeneous material deposition of blisk blades by 5-axis laser cladding  

Science Journals Connector (OSTI)

The application of laser cladding technology is becoming widely extended in the ... parts. These complex parts require 5-axis laser cladding deposition processes whose programming demands optimized and ... homoge...

Amaia Calleja; Iván Tabernero…

2014-10-01T23:59:59.000Z

364

Latitudinal gradients of coniferous tree species, vegetation, and climate in the Sierran-Cascade axis of Northern California  

Science Journals Connector (OSTI)

Latitudinal gradients of tree species composition along the Sierran/Cascade axis in northern California were explored by comparing forests of Lassen Volcanic and Yosemite National Parks, USA. A calibration pro...

Albert J. Parker

1994-12-01T23:59:59.000Z

365

The influence of the nonverticality of the azimuthal rotation axis of the concentrator (heliostat) on program tracking accuracy  

Science Journals Connector (OSTI)

It is shown that the nonverticality of the azimuthal axis has a significant influence on the accuracy of the program control of the concentrator (heliostat). To eliminate this error, it is...

A. A. Abdurakhmanov; S. A. Orlov; A. S. Saribaev; Kh. K. Fazilov

2010-12-01T23:59:59.000Z

366

Comparative study of voltage oriented and frequency coordinated control of grid connected doubly fed induction generator  

Science Journals Connector (OSTI)

In this paper a comparative study between voltage oriented control (VOC) and frequency coordinated control (FCC) of grid connected doubly fed induction generator (DFIG) is presented. The two method controls are deeply done on DFIG converter sides grid side converter (GSC) and rotor side converter (RSC). The VOC method permanently maintains the DFIG reactive power to zero values to achieve stable voltage. This control is implemented by regulating the rotor direct axis reference current in RSC using grid reactive power. On the other hand the FCC has employed the active power obtaining from the system frequency deviation to control the rotor quadrature axis reference current in the RSC. The GSC is the same in two studies and its applied vector controlled method. The comparison study between the two methods is conducted at a steady and dynamic state under constant and variable wind speeds. The simulation results are carried out by using PSCAD/EMTDC electromagnetic transient program to validate the comparison study between two methods control of DFIG. The outcomes of the simulation show that the VOC is very convenient when the DFIG operated at transient mode and variable wind speeds while the FCC is feasible and effective for steady-state mode applications. Furthermore the FCC method has an ability to reduce the active and reactive powers ripples as well as decreasing torque harmonics. Both of two methods had fewer transient recovery values of output parameters which ensure safety dynamic response of DFIG and power system. This study contributes significantly to choose the suitable control of the DFIG converters according to electrical grid operation conditions. In addition if a joint control has been applied to these two methods the wind power gained strong and flexible control of the frequency and voltage for different operating conditions.

Li Yang

2014-01-01T23:59:59.000Z

367

Annual Growth Bands in Hymenaea courbaril  

SciTech Connect

One significant source of annual temperature and precipitation data arises from the regular annual secondary growth rings of trees. Several tropical tree species are observed to form regular growth bands that may or may not form annually. Such growth was observed in one stem disk of the tropical legume Hymenaea courbaril near the area of David, Panama. In comparison to annual reference {Delta}{sup 14}C values from wood and air, the {Delta}{sup 14}C values from the secondary growth rings formed by H. courbaril were determined to be annual in nature in this one stem disk specimen. During this study, H. courbaril was also observed to translocate recently produced photosynthate into older growth rings as sapwood is converted to heartwood. This process alters the overall {Delta}{sup 14}C values of these transitional growth rings as cellulose with a higher {Delta}{sup 14}C content is translocated into growth rings with a relatively lower {Delta}{sup 14}C content. Once the annual nature of these growth rings is established, further stable isotope analyses on H. courbaril material in other studies may help to complete gaps in the understanding of short and of long term global climate patterns.

Westbrook, J A; Guilderson, T P; Colinvaux, P A

2004-02-09T23:59:59.000Z

368

APS Guideline for CAT/XOR Sector Orientation  

NLE Websites -- All DOE Office Websites (Extended Search)

CAT/XSD Sector Orientation CAT/XSD Sector Orientation October 1, 1999 (Updated October 11, 2004) Introduction The orientation described in this guideline is designed to provide the basic information needed by new users to make safe and effective use of CAT/XSD’s facilities at the APS. The CAT/XSD will also give appropriate parts of this orientation to visitors who are not expected to do hands-on work in CAT/XSD's facilities. Contents of the Orientation Part 1: APS Requirements CAT/XSD will ensure that prospective visitors are aware that they must: Register with the APS User Office and receive an appropriate safety orientation upon arrival and Never enter a controlled area unescorted. CAT/XSD will inform prospective users that they must: Contact the APS User Office prior to arrival for guidance on

369

Medium-solidity Vertical Axis Wind Turbines for use in Urban Environments S. Tullis, A. Fiedler, K. McLaren, S. Ziada  

E-Print Network (OSTI)

Medium-solidity Vertical Axis Wind Turbines for use in Urban Environments S. Tullis, A. Fiedler, K Vertical axis wind turbines are currently experiencing a renewed interest in small- scale applications: vertical axis wind turbines, vibration, blade aerodynamics #12;Introduction In community wind power

Tullis, Stephen

370

A generalized on-line estimation and control of five-axis contouring errors of CNC machine tools  

Science Journals Connector (OSTI)

Abstract Nonlinear and configuration-dependent five-axis kinematics make contouring errors difficult to estimate and control in real time. This paper proposes a generalized method for the on-line estimation and control of five-axis contouring errors. First, a generalized Jacobian function is derived based on screw theory in order to synchronize the motions of linear and rotary drives. The contouring error components contributed by all active drives are estimated through interpolated position commands and the generalized Jacobian function. The estimated axis components of contouring errors are fed back to the position commands of each closed loop servo drive with a proportional gain. The proposed contouring error estimation and control methods are general, and applicable to arbitrary five-axis tool paths and any kinematically admissible five-axis machine tools. The proposed algorithms are verified experimentally on a five-axis machine controlled by a modular research CNC system built in-house. The contouring errors are shown to be reduced by half with the proposed method, which is simple to implement in existing CNC systems.

Jixiang Yang; Yusuf Altintas

2015-01-01T23:59:59.000Z

371

Development of Technology Roadmap for Remanufacturing Oriented Production Equipment  

Science Journals Connector (OSTI)

In order to identify sustainable technologies to meet sustainability challenges of 21st century, a technology roadmapping for remanufacturing oriented production equipment is developed. The roadmap was structured...

V. P. Cunha; I. Balkaya; J. Palacios; H. Rozenfeld…

2011-01-01T23:59:59.000Z

372

Software Adaptation Patterns for Service-Oriented Architectures .  

E-Print Network (OSTI)

??This thesis describes the concept of software adaptation patterns and how they can be used in software adaptation of service-oriented architectures. The patterns are described… (more)

Hashimoto, Koji

2010-01-01T23:59:59.000Z

373

Modeling and analyzing service-oriented enterprise architectural styles.  

E-Print Network (OSTI)

?? Modern enterprises consist of complex business systems. The Enterprise Service-Oriented Architecture (ESOA) becomes an important enterprise architectural style (EAS) for designing and implementing business… (more)

Tang, Longji

2012-01-01T23:59:59.000Z

374

Service oriented architecture governance tools within information security .  

E-Print Network (OSTI)

??Service Oriented Architecture has many advantages. For example, organisations can align business with Information Technology, reuse the developed functionality, reduce development and maintain cost for… (more)

Mokgosi, Letlhogonolo

2012-01-01T23:59:59.000Z

375

Service-oriented design of environmental information systems.  

E-Print Network (OSTI)

??Service-orientation has an increasing impact upon the design process and the architecture of environmental information systems. This thesis specifies the SERVUS design methodology for geospatial… (more)

Usländer, Thomas

2010-01-01T23:59:59.000Z

376

EPA - RCRA Orientation Manual 2011: Resource Conservation and...  

Open Energy Info (EERE)

and Recovery Act Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: EPA - RCRA Orientation Manual 2011: Resource Conservation and Recovery Act...

377

Simulation of winds as seen by a rotating vertical axis wind turbine blade  

SciTech Connect

The objective of this report is to provide turbulent wind analyses relevant to the design and testing of Vertical Axis Wind Turbines (VAWT). A technique was developed for utilizing high-speed turbulence wind data from a line of seven anemometers at a single level to simulate the wind seen by a rotating VAWT blade. Twelve data cases, representing a range of wind speeds and stability classes, were selected from the large volume of data available from the Clayton, New Mexico, Vertical Plane Array (VPA) project. Simulations were run of the rotationally sampled wind speed relative to the earth, as well as the tangential and radial wind speeds, which are relative to the rotating wind turbine blade. Spectral analysis is used to compare and assess wind simulations from the different wind regimes, as well as from alternate wind measurement techniques. The variance in the wind speed at frequencies at or above the blade rotation rate is computed for all cases, and is used to quantitatively compare the VAWT simulations with Horizontal Axis Wind Turbine (HAWT) simulations. Qualitative comparisons are also made with direct wind measurements from a VAWT blade.

George, R.L.

1984-02-01T23:59:59.000Z

378

String dynamics and ejection along the axis of a spinning black hole  

Science Journals Connector (OSTI)

Relativistic current carrying strings moving axisymmetrically on the background of a Kerr black hole are studied. The boundaries and possible types of motion of a string with a given energy and current are found. Regions of parameters for which the string falls into the black hole, is trapped in a toroidal volume, or can escape to infinity, are identified, and representative trajectories are examined by numerical integration, illustrating various interesting behaviors. In particular, we find that a string can start out at rest near the equatorial plane and, after bouncing around, be ejected out along the axis, some of its internal (elastic or rotational kinetic) energy having been transformed into translational kinetic energy. The resulting velocity can be an order unity fraction of the speed of light. This process results from the presence of an outer tension barrier and an inner angular momentum barrier that are deformed by the gravitational field. We speculatively discuss the possible astrophysical significance of this mechanism as a means of launching a collimated jet of magnetohydrodynamics plasma flux tubes along the spin axis of a gravitating system fed by an accretion disk.

Ted Jacobson and Thomas P. Sotiriou

2009-03-26T23:59:59.000Z

379

Eucentric four-axis ultrahigh vacuum goniometer for reflection high-energy electron diffraction applications  

SciTech Connect

The design and performance of a four-axis low-profile eucentric UHV goniometer for in situ reflection high-energy electron diffraction (RHEED) studies during film deposition is reported. The design provides one translational and three rotational degrees of freedom that are fully independent. Although developed to facilitate high-pressure RHEED during the growth of oxide thin films by pulsed laser deposition, this goniometer design is applicable to other UHV techniques including molecular beam epitaxy. The goniometer requires only a single DN 100 CF flange (6 in. o.d., 100 mm i.d.), making it suitable for small deposition systems, too. Samples, attached to a resistively heated holder, can be easily transferred on and off of the goniometer without breaking vacuum. The holder accommodates samples up to 10 mmx10 mm in size and allows them to be heated to 900 deg. C in pure oxygen while being attached to the goniometer. Full eucentric motion of the hot sample is possible with a typical axis precision of <0.1 deg. Most of the mechanism is located in air, allowing the use of standard materials and lubricants, substantially reducing the in-vacuum mechanics, and increasing the precision, reliability, and robustness of the system.

Schmehl, A.; Schulz, R.R.; Mannhart, J. [Experimentalphysik VI, Elektronische Korrelationen und Magnetismus, Institut fuer Physik, Universitaet Augsburg, Universitaetsstrasse 1, D-86135 Augsburg (Germany)

2005-12-15T23:59:59.000Z

380

Offshore floating vertical axis wind turbines, dynamics modelling state of the art. part I: Aerodynamics  

Science Journals Connector (OSTI)

Abstract The need to further exploit offshore wind resources has pushed offshore wind farms into deeper waters, requiring the use of floating support structures to be economically sustainable. The use of conventional wind turbines may not continue to be the optimal design for floating applications. Therefore it is important to assess other alternative concepts in this context. Vertical axis wind turbines (VAWTs) are one promising concept, and it is important to first understand the coupled and relatively complex dynamics of floating \\{VAWTs\\} to assess their technical feasibility. A comprehensive review detailing the areas of engineering expertise utilised in developing an understanding of the coupled dynamics of floating \\{VAWTs\\} has been developed through a series of articles. This first article details the aerodynamic modelling of VAWTs, providing a review of available models, discussing their applicability to floating \\{VAWTs\\} and current implementations by researchers in this field. A concise comparison between conventional horizontal axis wind turbines and \\{VAWTs\\} is also presented, outlining the advantages and disadvantages of these technologies for the floating wind industry. This article has been written both for researchers new to this research area, outlining underlying theory whilst providing a comprehensive review of the latest work, and for experts in this area, providing a comprehensive list of the relevant references where the details of modelling approaches may be found.

Michael Borg; Andrew Shires; Maurizio Collu

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "band axis orientation" 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

Lightweight Service Oriented Architecture for Pervasive Computing  

E-Print Network (OSTI)

Pervasive computing appears like a new computing era based on networks of objects and devices evolving in a real world, radically different from distributed computing, based on networks of computers and data storages. Contrary to most context-aware approaches, we work on the assumption that pervasive software must be able to deal with a dynamic software environment before processing contextual data. After demonstrating that SOA (Service oriented Architecture) and its numerous principles are well adapted for pervasive computing, we present our extended SOA model for pervasive computing, called Service Lightweight Component Architecture (SLCA). SLCA presents various additional principles to meet completely pervasive software constraints: software infrastructure based on services for devices, local orchestrations based on lightweight component architecture and finally encapsulation of those orchestrations into composite services to address distributed composition of services. We present a sample application of t...

Tigli, Jean-Yves; Rey, Gaetan; Hourdin, Vincent; Riveill, Michel

2011-01-01T23:59:59.000Z

382

Band excitation method applicable to scanning probe microscopy  

DOE Patents (OSTI)

Methods and apparatus are described for scanning probe microscopy. A method includes generating a band excitation (BE) signal having finite and predefined amplitude and phase spectrum in at least a first predefined frequency band; exciting a probe using the band excitation signal; obtaining data by measuring a response of the probe in at least a second predefined frequency band; and extracting at least one relevant dynamic parameter of the response of the probe in a predefined range including analyzing the obtained data. The BE signal can be synthesized prior to imaging (static band excitation), or adjusted at each pixel or spectroscopy step to accommodate changes in sample properties (adaptive band excitation). An apparatus includes a band excitation signal generator; a probe coupled to the band excitation signal generator; a detector coupled to the probe; and a relevant dynamic parameter extractor component coupled to the detector, the relevant dynamic parameter extractor including a processor that performs a mathematical transform selected from the group consisting of an integral transform and a discrete transform.

Jesse, Stephen; Kalinin, Sergei V

2013-05-28T23:59:59.000Z

383

Electronic materials with a wide band gap: recent developments  

Science Journals Connector (OSTI)

Usually, semiconductors with a band gap Eg 3 eV or larger are called wide band gap materials. Their optical emission can span the whole of the visible spectrum, enabling the development of devices for solid-state lighting. In addition, a large Eg results in a high electrical breakthrough field, which is interesting for high-power electronics.

Klimm, D.

2014-08-29T23:59:59.000Z

384

BAND STRUCTURE AND OPTICAL PROPERTIES OF MAGNESIUM FLUORIDE  

E-Print Network (OSTI)

595 BAND STRUCTURE AND OPTICAL PROPERTIES OF MAGNESIUM FLUORIDE C. JOUANIN, J. P. ALBERT and C'autres transitions expéri- mentales. Abstract. 2014 The electronic band structure of magnesium fluoride is calculated, only some qualitative investigations exist for the calcium and magnesium fluorides [1, 2]. This lack

Paris-Sud XI, Université de

385

Vibration-Rotation Bands of Allene-1. 1-d$_{2}$  

Science Journals Connector (OSTI)

24 February 1959 research-article Vibration-Rotation Bands of Allene-1. 1-d...the perpendicular bands to particular vibrations, some characteristic details of their...Coriolis interaction between B and B class vibrations, and the results are in general accord...

1959-01-01T23:59:59.000Z

386

Vibration-Rotation Bands of Acetylene and the Molecular Dimensions  

Science Journals Connector (OSTI)

4 December 1956 research-article Vibration-Rotation Bands of Acetylene and the...constants in the isotopic acetylenes, some vibration-rotation bands of acetylene have been...The values for each of the molecular vibrations have been re-determined, taking into...

1956-01-01T23:59:59.000Z

387

Spin Wave Energies in the Band Theory of Ferromagnetism  

Science Journals Connector (OSTI)

...1967 research-article Spin Wave Energies in the Band Theory of Ferromagnetism...made of the coefficient C in the energy CK of a spin wave of small wave vector K in a ferromagnetic...with Nagaoka's work on spin wave energies in a nearly half-filled band...

1967-01-01T23:59:59.000Z

388

THE INVERSE OF A SEMI-INFINITE SYMMETRIC BANDED MATRIX  

E-Print Network (OSTI)

algorithm 3]. The eigen- values and eigen-vectors for the nite symmetric tridiagonal case were obtainedTHE INVERSE OF A SEMI-INFINITE SYMMETRIC BANDED MATRIX D. A. LAVISy , B. W. SOUTHERNz and I. F a method for obtaining an analytic form for a class of sym- metric semi-in nite banded matrices, which are

Lavis, David

389

Analytical descriptions of the band structure of direct-band-gap zinc-blende-structure semiconductors in the k?p Kane model  

Science Journals Connector (OSTI)

In the framework of the well-known k?p Kane band theory, accurate analytical approximations of conduction- and valence-band dispersion of direct-band-gap zinc-blende-structure semiconductors are derived when the spin-orbit-splitting energy does not exceed the band-gap energy. These approximations include the interactions with the remote bands. The expressions of the eigenfunctions are also obtained. The present analysis elucidates and unifies previous analytical band descriptions.

H.-J. Drouhin and J. Peretti

1991-10-15T23:59:59.000Z

390

Substrate-Induced Band-Gap Opening in Epitaxial Graphene  

NLE Websites -- All DOE Office Websites (Extended Search)

Substrate-Induced Band-Gap Opening in Epitaxial Graphene Print Substrate-Induced Band-Gap Opening in Epitaxial Graphene Print Prospective challengers to silicon, the long-reigning king of semiconductors for computer chips and other electronic devices, have to overcome silicon's superb collection of materials properties as well as sophisticated fabrication technologies refined by six decades of effort by materials scientists and engineers. Graphene, one of the latest contenders, has a rather impressive list of features of its own but has lacked a key characteristic of all semiconductors, an energy gap (band gap) in its electronic band structure. A multi-institutional collaboration under the leadership of researchers with Berkeley Lab and the University of California, Berkeley, have now demonstrated that growing an epitaxial film of graphene on a silicon carbide substrate results in a significant band gap, 0.26 electron volts (eV), an important step toward making graphene useful as a semiconductor.

391

Electron Band Structure of Solid Methane: Ab Initio Calculations  

Science Journals Connector (OSTI)

The band structure of crystalline methane has been calculated in a linear-combination-of-molecular-orbitals approximation. In this molecular tight-binding method the Bloch sums are built up of Hartree-Fock orbitals of the free molecules. Interactions between the states of different molecules are calculated directly from molecular integrals without reducing the exchange interaction to an exchange potential. The approximations involved are shown to be well justified for a crystal made of closed-shell units. The band structure is obtained by solving secular equation in 400 points along the relevant symmetry lines. The calculated bands are relatively narrow, less than 2.5 eV wide, around the molecular levels. The band-to-band gap in solid methane is 24.5 eV. This value has the same order of magnitude as in solid rare gases.

Lucjan Piela; Luciano Pietronero; Raffaele Resta

1973-06-15T23:59:59.000Z

392

Substrate-Induced Band-Gap Opening in Epitaxial Graphene  

NLE Websites -- All DOE Office Websites (Extended Search)

Substrate-Induced Band-Gap Opening in Epitaxial Graphene Print Substrate-Induced Band-Gap Opening in Epitaxial Graphene Print Prospective challengers to silicon, the long-reigning king of semiconductors for computer chips and other electronic devices, have to overcome silicon's superb collection of materials properties as well as sophisticated fabrication technologies refined by six decades of effort by materials scientists and engineers. Graphene, one of the latest contenders, has a rather impressive list of features of its own but has lacked a key characteristic of all semiconductors, an energy gap (band gap) in its electronic band structure. A multi-institutional collaboration under the leadership of researchers with Berkeley Lab and the University of California, Berkeley, have now demonstrated that growing an epitaxial film of graphene on a silicon carbide substrate results in a significant band gap, 0.26 electron volts (eV), an important step toward making graphene useful as a semiconductor.

393

Highly Mismatched Alloys for Intermediate Band Solar Cells  

SciTech Connect

It has long been recognized that the introduction of a narrow band of states in a semiconductor band gap could be used to achieve improved power conversion efficiency in semiconductor-based solar cells. The intermediate band would serve as a ''stepping stone'' for photons of different energy to excite electrons from the valence to the conduction band. An important advantage of this design is that it requires formation of only a single p-n junction, which is a crucial simplification in comparison to multijunction solar cells. A detailed balance analysis predicts a limiting efficiency of more than 50% for an optimized, single intermediate band solar cell. This is higher than the efficiency of an optimized two junction solar cell. Using ion beam implantation and pulsed laser melting we have synthesized Zn{sub 1-y}Mn{sub y}O{sub x}Te{sub 1-x} alloys with x<0.03. These highly mismatched alloys have a unique electronic structure with a narrow oxygen-derived intermediate band. The width and the location of the band is described by the Band Anticrossing model and can be varied by controlling the oxygen content. This provides a unique opportunity to optimize the absorption of solar photons for best solar cell performance. We have carried out systematic studies of the effects of the intermediate band on the optical and electrical properties of Zn{sub 1-y}Mn{sub y}O{sub x}Te{sub 1-x} alloys. We observe an extension of the photovoltaic response towards lower photon energies, which is a clear indication of optical transitions from the valence to the intermediate band.

Walukiewicz, W.; Yu, K.M.; Wu, J.; Ager III, J.W.; Shan, W.; Scrapulla, M.A.; Dubon, O.D.; Becla, P.

2005-03-21T23:59:59.000Z

394

Power Spectra in V-band and Halpha of Nine Irregular Galaxies  

E-Print Network (OSTI)

Fourier transform power spectra of major axis cuts in V and Halpha images were made for a sample of 9 irregular galaxies. These power spectra reveal structure over a wide range of scales. For 6 of the galaxies the power spectrum slopes at intermediate scales (1-400 pc) in the V-band images range from -1.3 to -1.5. The similarity of slopes suggests that the same processes are structuring these systems. These slopes are slightly shallower than what is observed in other galaxies in HI, molecular emission, dust extinction, and optical light. Three of the galaxies have flat power spectra like noise from the sky; these three galaxies are relatively indistinct in the direct images. The power spectrum slope for Halpha steepens with increasing star formation rate, ranging from a shallow value comparable to the noise at low rates to a steep value with a slope of -1.5 at high rates. This change reflects the increasing areal filling factor of Halpha emission with increasing star formation rate, and an apparently universal slope inside the Halpha regions that is comparable to that for Kolmogorov turbulence. The power spectrum of HI in one galaxy has a steeper power law, with a slope of -2.9. The fact that the power laws of star formation are about the same for dwarf galaxies and giant spiral galaxies suggests the microscopic processes are the same, independent of spiral density waves and galaxy size.

Kyle W. Willett; Bruce G. Elmegreen; Deidre A. Hunter

2005-03-14T23:59:59.000Z

395

An Object-Oriented Algebraic Steam-Boiler Control Specification  

E-Print Network (OSTI)

An Object-Oriented Algebraic Steam-Boiler Control Specification Peter Csaba ()lveczky, Poland Abstract. In this paper an object-oriented algebraic solution of the steam-boiler specification Introduction The steam-boiler control specification problem has been proposed as a challenge for different

Ã?lveczky, Peter Csaba

396

An Object-Oriented Algebraic Steam-Boiler Control Specification  

E-Print Network (OSTI)

An Object-Oriented Algebraic Steam-Boiler Control Specification.In this paper an object-oriented algebraic solution of the steam-boiler specification problem is presented computations cannot happen. 1 Introduction The steam-boiler control specification problem has been

Ã?lveczky, Peter Csaba

397

Magnetic Compass Orientation in Larval Iberian Green Frogs, Pelophylax Perezi  

E-Print Network (OSTI)

Magnetic Compass Orientation in Larval Iberian Green Frogs, Pelophylax Perezi Francisco J. Diego, Virginia Tech, Blacksburg, VA 24061, USA Introduction Magnetic compass orientation has been demonstra- ted). Among urodele amphibians, use of directional information derived from the earth's magnetic field has

Phillips, John B.

398

Autonomy Oriented Computing (AOC): Formulating Computational Systems with  

E-Print Network (OSTI)

Autonomy Oriented Computing (AOC): Formulating Computational Systems with Autonomous Components and proposes autonomy oriented computing (AOC) as a paradigm to describe systems for solving hard computational problems and for characterizing the behaviors of a complex system. AOC differs from major complex system

Xu, Jianliang

399

Transportation Security SensorNet: a service-oriented  

E-Print Network (OSTI)

Transportation Security SensorNet: a service-oriented architecture for cargo monitoring Martin solution of developing a service-oriented architecture (SOA) for cargo monitoring and its individual and handovers. Tracking trade is difficult to manage in different formats and legacy applications Web services

Kansas, University of

400

Service Oriented Architectural Design , A. Lluch Lafuente1  

E-Print Network (OSTI)

Service Oriented Architectural Design R. Bruni1 , A. Lluch Lafuente1 , U. Montanari1 , E. Tuosto2 1's Service Component Architecture (SCA) which has become part of the Open Service Oriented Application [25, an emergent paradigm inspired by the Service Component Architecture. We model the com- plex operation

Tuosto, Emilio

Note: This page contains sample records for the topic "band axis orientation" 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

Knowledge Problems in Process-Oriented Organizations: A Pattern Approach  

E-Print Network (OSTI)

Knowledge Problems in Process-Oriented Organizations: A Pattern Approach Markus Strohmaier1 for the identi- fication of knowledge problems in process-oriented organizations. On an operative level, knowledge problems occur when the generation, storage, transfer or application of knowledge

402

Requirements on Quality Specification Posed by Service Orientation  

E-Print Network (OSTI)

their contribution to service oriented QoS specification is still missing. In this paper we present a strictly. Furthermore we derive requirements for future specification concepts applicable in service oriented en to the composition of products by outsourcing, which results in creat- ing business critical value chains. This trend

403

An empirical study of aspect-oriented metrics  

Science Journals Connector (OSTI)

Metrics for aspect-oriented software have been proposed and used to investigate the benefits and the disadvantages of crosscutting concerns modularisation. Some of these metrics have not been rigorously defined nor analytically evaluated. Also, there ... Keywords: Aspect-oriented software development, AspectJ, Empirical evaluation, Metrics

Eduardo Kessler Piveta; Ana Moreira; Marcelo Soares Pimenta; João Araújo; Pedro Guerreiro; R. Tom Price

2012-11-01T23:59:59.000Z

404

Safety-Oriented Design of Component Assemblies using Safety Interfaces  

E-Print Network (OSTI)

FACS 2006 Safety-Oriented Design of Component Assemblies using Safety Interfaces Jonas Elmqvist¨oping, Sweden Abstract This paper promotes compositional reasoning in the context of safety-critical systems, and demonstrates a safety-oriented component model using an application from the automotive industry: an Adaptive

405

Oriental Diction and Theme in English Verse, 1740-1840  

E-Print Network (OSTI)

in Oriental context, is an importation from the West. An interesting example of varied appeal in different words for the same object is found in the pseudo-classical "Philomela", the English "nightingale", and the Oriental "bulbul". In the early part...

Osborne, Edna

1916-05-01T23:59:59.000Z

406

ORIENTATION IN JUVENILES OF A SEMIAQUATIC TURTLE, KINOSTERNON FLAVESCENS  

E-Print Network (OSTI)

ORIENTATION IN JUVENILES OF A SEMIAQUATIC TURTLE, KINOSTERNON FLAVESCENS JOHN B. IVERSON 1 ABSTRACT: Hatchling orientation has been widely studied among marine turtle species, but much less so in nonmarine turtles. Yellow mud turtles (Kinosternon flavescens) exhibit an unusual semiaquatic life history

Plummer, Michael V.

407

Temperatures Indicated by Intensity Distributions in Band Spectra  

Science Journals Connector (OSTI)

It is generally supposed that the intensity of any particular line in a band spectrum may be calculated from the Maxwell-Boltzmann law, assuming the gas to be in temperature equilibrium. From the results of this experimental work, it appears that under some conditions of excitation other factors than the temperature of the gas govern the intensity distribution. Measurements on the negative bands of N2+ excited in low voltage arcs in the pure gas show that at 1100°K and 2800°K the distribution of intensities among the rotational lines is exactly the same, whilst the admixture of helium with nitrogen alters the distribution completely and gives a much lower indicated temperature. Similar results are found with the first negative bands of CO+. The differences are accounted for by the conversion of translational energy of the electrons into rotational energy of the molecules when the bands are excited by electron impacts in the pure gas. When the bands are excited by impacts of the second kind in gas mixtures, no change in rotational energy occurs and thus the indicated temperature is much lower. The distribution of intensity among the vibrational states of the molecules has been examined for the complete system of negative bands of N2+. While almost all of the energy is concentrated in the low vibration states when the bands are excited by electron impacts, the energy is spread out towards the higher vibration states when the excitation is by collisions of the second kind with metastable helium atoms.

O. S. Duffendack; R. W. Revans; A. S. Roy

1934-06-01T23:59:59.000Z

408

Ukraine-GTZ Climate Oriented Mobility | Open Energy Information  

Open Energy Info (EERE)

Climate Oriented Mobility Climate Oriented Mobility Jump to: navigation, search Logo: Ukraine-GTZ Climate Oriented Mobility Name Ukraine-GTZ Climate Oriented Mobility Agency/Company /Organization Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH Partner German Federal Ministry for Economic Cooperation and Development (BMZ) Sector Energy Focus Area Transportation Topics Background analysis Website http://www.gtz.de/en/praxis/95 Program Start 2008 Program End 2011 Country Ukraine UN Region Eastern Europe References GTZ projects[1] GTZ Transport & Climate Change Website[2] This article is a stub. You can help OpenEI by expanding it. References ↑ "GTZ projects" ↑ "GTZ Transport & Climate Change Website" Retrieved from "http://en.openei.org/w/index.php?title=Ukraine-GTZ_Climate_Oriented_Mobility&oldid=383040"

409

Orientation Visit to the Paducah Gaseous Diffusion Plant, July 2011 |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Orientation Visit to the Paducah Gaseous Diffusion Plant, July 2011 Orientation Visit to the Paducah Gaseous Diffusion Plant, July 2011 Orientation Visit to the Paducah Gaseous Diffusion Plant, July 2011 The U.S. Department of Energy (DOE) Office of Enforcement and Oversight, within the Office of Health, Safety and Security (HSS), conducted an orientation visit to the DOE Paducah Site Office (PAD) from July 25-27, 2011. The purpose of the visit was to discuss the nuclear safety oversight strategy, describe the site lead program, increase HSS personnel's operational awareness of the site's activities, and to determine how HSS can carry out its independent oversight and mission support responsibilities. Orientation Visit to the Paducah Gaseous Diffusion Plant, July 2011 More Documents & Publications Independent Activity Report, Portsmouth Gaseous Diffusion Plant - August

410

User-orientated comparative analysis of climate compatible development  

Open Energy Info (EERE)

User-orientated comparative analysis of climate compatible development User-orientated comparative analysis of climate compatible development planning methodologies and tools Jump to: navigation, search Name User-orientated comparative analysis of climate compatible development planning methodologies and tools Agency/Company /Organization Climate and Development Knowledge Network (CDKN) Sector Energy, Land, Climate Topics Implementation, Low emission development planning, Policies/deployment programs Website http://www.cdkn.org/wp-content Program Start 2011 Program End 2011 References User-orientated comparative analysis of climate compatible development planning methodologies and tools[1] User-orientated comparative analysis of climate compatible development planning methodologies and tools Screenshot In response to demand from a range of practitioners and government

411

On-Axis Brilliance and Power of In-Vacuum Undulators for The Advanced Photon Source  

NLE Websites -- All DOE Office Websites (Extended Search)

4 4 On-Axis Brilliance and Power of In-Vacuum Undulators for the Advanced Photon Source (formerly MD-TN-2009-004) R. Dejus, M. Jaski, and S.H. Kim - MD Group/ASD Rev. 1, November 25, 2009: Updated the fitted B eff in Tables 1 - 3, and 5 to use two decimals in the fitted equation. Explained chosen gaps. Added clarifications in the text and added additional references. Edited by C. Eyberger for release as cleared document ANL/APS/LS-314; updated in ICMS. Rev. 0a, June 17, 2009: ICMS Initial Release (minor clarifications and corrections of typographical errors, added footnote "d" to Table 4). Rev. 0, June 16, 2009: First Release as Technical Note MD-TN-2009-004. Table of Contents Introduction ......................................................................................................................... 2

412

Combined Experiment Phase 1. [Horizontal axis wind turbines: wind tunnel testing versus field testing  

SciTech Connect

How does wind tunnel airfoil data differ from the airfoil performance on an operating horizontal axis wind turbine (HAWT) The National Renewable Energy laboratory has been conducting a comprehensive test program focused on answering this question and understanding the basic fluid mechanics of rotating HAWT stall aerodynamics. The basic approach was to instrument a wind rotor, using an airfoil that was well documented by wind tunnel tests, and measure operating pressure distributions on the rotating blade. Based an the integrated values of the pressure data, airfoil performance coefficients were obtained, and comparisons were made between the rotating data and the wind tunnel data. Care was taken to the aerodynamic and geometric differences between the rotating and the wind tunnel models. This is the first of two reports describing the Combined Experiment Program and its results. This Phase I report covers background information such as test setup and instrumentation. It also includes wind tunnel test results and roughness testing.

Butterfield, C.P.; Musial, W.P.; Simms, D.A.

1992-10-01T23:59:59.000Z

413

The determination of stochastic loads on horizontal axis wind turbine blades  

SciTech Connect

The FAST Code which is capable of determining structural loads of a flexible, teetering, horizontal axis wind turbine is described and comparisons of calculated loads with test data are given at two wind speeds for the ESI-80. The FAST Code models a two-bladed HAWT with degrees-of-freedom for blade bending, teeter, drive train flexibility, yaw, and windwise and crosswind tower motion. The code allows blade dimensions, stiffnesses, and weights to differ and the code models tower shadow, wind shear, and turbulence. Additionally, dynamic stall is included as are delta-3 and an underslung rotor. Load comparisons are made with ESI-80 test data in the form of power spectral density, rainflow counting occurrence histograms, and azimuth averaged bin plots. It is concluded that agreement between the FAST Code and test results is good.

Freeman, L.N.; Wilson, R.E. [Oregon State Univ., Corvallis, OR (United States). Dept. of Mechanical Engineering

1998-05-01T23:59:59.000Z

414

Electron cyclotron resonance near the axis of the gas-dynamic trap  

SciTech Connect

Propagation of an extraordinary electromagnetic wave in the vicinity of electron cyclotron resonance surface in an open linear trap is studied analytically, taking into account inhomogeneity of the magnetic field in paraxial approximation. Ray trajectories are derived from a reduced dispersion equation that makes it possible to avoid the difficulty associated with a transition from large propagation angles to the case of strictly longitudinal propagation. Our approach is based on the theory, originally developed by Zvonkov and Timofeev [Sov. J. Plasma Phys. 14, 743 (1988)], who used the paraxial approximation for the magnetic field strength, but did not consider the slope of the magnetic field lines, which led to considerable error, as has been recently noted by Gospodchikov and Smolyakova [Plasma Phys. Rep. 37, 768-774 (2011)]. We have found ray trajectories in analytic form and demonstrated that the inhomogeneity of both the magnetic field strength and the field direction can qualitatively change the picture of wave propagation and significantly affect the efficiency of electron cyclotron heating of a plasma in a linear magnetic trap. Analysis of the ray trajectories has revealed a criterion for the resonance point on the axis of the trap to be an attractor for the ray trajectories. It is also shown that a family of ray trajectories can still reach the resonance point on the axis if the latter generally repels the ray trajectories. As an example, results of general theory are applied to the electron cyclotron resonance heating experiment which is under preparation on the gas dynamic trap in the Budker Institute of Nuclear Physics [Shalashov et al., Phys. Plasmas 19, 052503 (2012)].

Bagulov, D. S. [Novosibirsk State University, Pirogova Street 2, Novosibirsk (Russian Federation); Kotelnikov, I. A. [Novosibirsk State University, Pirogova Street 2, Novosibirsk (Russian Federation); Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sciences, Akademika Lavrentyeva Prospect 11, 630090 Novosibirsk (Russian Federation)

2012-08-15T23:59:59.000Z

415

Shear Banding in an F-Actin Solution  

Science Journals Connector (OSTI)

We report herein the first evidence that an F-actin solution shows shear banding, which is characterized by the spontaneous separation of homogeneous shear flow into two macroscopic domains of different definite shear rates. The constant shear stress observed in the F-actin solution is explained by the banded flow with volume fractions that obey the lever rule. Nonhomogenous reversible flows were observed in the F-actin solution with respect to upward and downward changes in the shear rate. This is the first time shear banding has been observed in a simple biomacromolecule. The biological implications and dynamic aspects of shear flow velocity characteristic patterns are discussed.

Itsuki Kunita; Katsuhiko Sato; Yoshimi Tanaka; Yoshinori Takikawa; Hiroshi Orihara; Toshiyuki Nakagaki

2012-12-10T23:59:59.000Z

416

Strong Orientation Dependence of Multinucleon Transfer Processes in $^{238}$U+$^{124}$Sn Reaction  

E-Print Network (OSTI)

We theoretically investigate multinucleon transfer (MNT) processes in $^{238}$U+$^{124}$Sn reaction at $E_\\mathrm{lab}=5.7$ MeV/$A$ using the time-dependent Hartree-Fock (TDHF) theory. For this reaction, measurements of MNT processes have been reported, showing substantial MNT cross sections accompanying more than ten protons. From the calculation, we find that the amount of transferred nucleons depends much on the relative orientation between the deformation axis of $^{238}$U and the relative vector connecting centers of $^{238}$U and $^{124}$Sn nuclei. We find a formation of thick neck when the $^{238}$U collides from its tip with $^{124}$Sn. However, the neck formation is substantially suppressed when $^{238}$U collides from its side. We have found that a large number of protons are transferred in the tip collision. This is caused by the breaking of the neck and subsequent absorption of nucleons in the neck region. We thus conclude that the measured MNT processes involving about ten protons originate from the neck breaking dynamics in the tip collisions of a deformed $^{238}$U nucleus.

Kazuyuki Sekizawa; Kazuhiro Yabana

2014-09-30T23:59:59.000Z

417

Energy-oriented models for WDM networks Abstract--A realistic energy-oriented model is necessary to  

E-Print Network (OSTI)

[4]. Recent initiatives gathering major IT companies started to explore the energy savings and greenEnergy-oriented models for WDM networks Abstract-- A realistic energy-oriented model is necessary to formally characterize the energy consumption and the consequent carbon footprint of actual and future high

Politècnica de Catalunya, Universitat

418

Service-Orientation in Computing Curriculum Yinong Chen and W. T. Tsai  

E-Print Network (OSTI)

-- Web software development and cloud computing based on Service-Oriented Architecture (SOA) and Service-Oriented object-oriented computing paradigms [1][2]. As the emergence of Service- Oriented Architecture (SOAService-Orientation in Computing Curriculum Yinong Chen and W. T. Tsai School of Computing

Chen, Yinong

419

Object-Oriented Modeling --1 2004 John Mylopoulos Conceptual Modeling CSC2507  

E-Print Network (OSTI)

Object-Oriented Modeling -- 1 2004 John Mylopoulos Conceptual Modeling CSC2507 Object-Oriented ModelingV. Object-Oriented Modeling Object-Oriented Modeling -- 2 2004 John Mylopoulos Conceptual Modeling and implementations. #12;Object-Oriented Modeling -- 3 2004 John Mylopoulos Conceptual Modeling CSC2507 Basic Concepts

Mylopoulos, John

420

PerfSONAR: A Service Oriented Architecture  

NLE Websites -- All DOE Office Websites (Extended Search)

PerfSONAR: PerfSONAR: A Service Oriented Architecture for Multi-domain Network Monitoring Andreas Hanemann 1 , Jeff W. Boote 2 , Eric L. Boyd 2 , Jérôme Durand 3 , Loukik Kudarimoti 4 , Roman Łapacz 5 , D. Martin Swany 6 , Szymon Trocha 5 , and Jason Zurawski 6 1 German Research Network (DFN), c/o Leibniz Supercomputing Center, Barer Str. 21, D-80333 Munich, Germany hanemann@lrz.de 2 Internet2, 1000 Oakbrook Drive, Suite 300, Ann Arbor, MI 48104, USA {boote,eboyd}@internet2.edu 3 GIP Renater, 151 Boulevard de l' Hôpital, 75013 Paris, France Jerome.durand@renater.fr 4 DANTE, 126-130 Hills Road, Cambridge CB2 1PG, UK loukik.kudarimoti@dante.org.uk 5 Poznan Supercomputing and Networking Center, Noskowskiego 12/14, 61-704 Poznan, Poland {romradz,szymon.trocha}@man.poznan.pl 6 Department of Computer and Information Sciences, University of Delaware, Newark, DE 19716, USA swany@cis.udel.edu,zurawski@eecis.udel.edu

Note: This page contains sample records for the topic "band axis orientation" 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

X-Band Photonic Band-Gap Accelerator Structure Breakdown Experiment  

SciTech Connect

In order to understand the performance of photonic band-gap (PBG) structures under realistic high gradient, high power, high repetition rate operation, a PBG accelerator structure was designed and tested at X band (11.424 GHz). The structure consisted of a single test cell with matching cells before and after the structure. The design followed principles previously established in testing a series of conventional pillbox structures. The PBG structure was tested at an accelerating gradient of 65 MV/m yielding a breakdown rate of two breakdowns per hour at 60 Hz. An accelerating gradient above 110 MV/m was demonstrated at a higher breakdown rate. Significant pulsed heating occurred on the surface of the inner rods of the PBG structure, with a temperature rise of 85 K estimated when operating in 100 ns pulses at a gradient of 100 MV/m and a surface magnetic field of 890 kA/m. A temperature rise of up to 250 K was estimated for some shots. The iris surfaces, the location of peak electric field, surprisingly had no damage, but the inner rods, the location of the peak magnetic fields and a large temperature rise, had significant damage. Breakdown in accelerator structures is generally understood in terms of electric field effects. These PBG structure results highlight the unexpected role of magnetic fields in breakdown. The hypothesis is presented that the moderate level electric field on the inner rods, about 14 MV/m, is enhanced at small tips and projections caused by pulsed heating, leading to breakdown. Future PBG structures should be built to minimize pulsed surface heating and temperature rise.

Marsh, Roark A.; /MIT /MIT /NIFS, Gifu /JAERI, Kyoto /LLNL, Livermore; Shapiro, Michael A.; Temkin, Richard J.; /MIT; Dolgashev, Valery A.; Laurent, Lisa L.; Lewandowski, James R.; Yeremian, A.Dian; Tantawi, Sami G.; /SLAC

2012-06-11T23:59:59.000Z

422

Determining the neutrino mass hierarchy and CP violation in NoVA with a second off-axis detector  

SciTech Connect

We consider a Super-NOVA-like experimental configuration based on the use of two detectors in a long-baseline experiment as NOVA. We take the far detector as in the present NOVA proposal and add a second detector at a shorter baseline. The location of the second off-axis detector is chosen such that the ratio L/E is the same for both detectors, being L the baseline and E the neutrino energy. We consider liquid argon and water- Cerenkov techniques for the second off-axis detector and study, for different experimental setups, the detector mass required for the determination of the neutrino mass hierarchy, for different values of {theta}{sub 13}. We also study the capabilities of such an experimental setup for determining CP-violation in the neutrino sector. Our results show that by adding a second off-axis detector a remarkable enhancement on the capabilities of the current NOVA experiment could be achieved.

Mena, Olga; /Fermilab; Palomares-Ruiz, Sergio; /Vanderbilt U.; Pascoli, Silvia; /CERN /Durham U., IPPP

2005-10-01T23:59:59.000Z

423

WI-TRIBE-STOCKBRIDGE-MUNSEE BAND OF MOHICAN INDIANS  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

WI-TRIBE-STOCKBRIDGE-MUNSEE BAND OF MOHICAN INDIANS WI-TRIBE-STOCKBRIDGE-MUNSEE BAND OF MOHICAN INDIANS Location: Tribe WI-TRIBE- STOCKBRIDGE- MUNSEE BAND OF MOHICAN INDIANS WI American Recovery and Reinvestment Act: Proposed Action or Project Description The Stockbridge-Munsee Band of Mohican Indians proposes to conduct energy efficient audits of residential and commerical buildings. Conditions: None Categorical Exclusion(s) Applied: A9, B5.1 *-For the complete DOE National Environmental Policy Act regulations regarding categorical exclusions, see Subpart D of 10 CFR10 21 This action would not: threaten a violation of applicable statutory, regulatory, or permit requirements for environment, safety, and health, including DOE and/or Executive Orders; require siting, construction, or major expansion of waste storage, disposal, recovery, or

424

CA-TRIBE-TUOLUMNE BAND OF MEWUK INDIANS  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

TRIBE-TUOLUMNE BAND OF MEWUK INDIANS TRIBE-TUOLUMNE BAND OF MEWUK INDIANS Location: Tribe CA-TRIBE- TUOLUMNE BAND OF MEWUK INDIANS CA American Recovery and Reinvestment Act: Proposed Action or Project Description The Tuolumne Band of MeWuk Indians proposes to reduce their fossil fuel emissions through increased energy efficiency and the implementation of renewable energy where applicable. Currently, the Tribe has contracted with the Renewable and Appropriate Energy Laboratory (RAEL) of the University of California, Berkeley, to identify the most cost-effective opportunities for increased energy efficiency and renewable energy technologies. The Tribe proposes to use a portion of the funding to allocate funds to RAEL for technical consultant services to assist the Tribe in identifying, prioritizing, and coordinating site specific

425

ND-TRIBE-TURTLE MOUNTAIN BAND OF CHIPPEWA  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

ND-TRIBE-TURTLE MOUNTAIN BAND OF CHIPPEWA ND-TRIBE-TURTLE MOUNTAIN BAND OF CHIPPEWA Energy Efficiency and Conservation Block Grant Program Location: Tribe ND-TRIBE-TURTLE MOUNTAIN BAND OF CHIPPEWA ND American Recovery and Reinvestment Act: Proposed Action or Project Description The Turtle Mountain Band of Chippewa Indians of North Dakota propose to 1) explore the potential for wind energy development on the Reservation by soliciting expertise from an engineering company to determine the best option for tapping wind energy on the reservation for its public buildings and seek legal expertise to study legal barriers that may exist; 2) conduct energy audits and a feasibility study to determine if several sizeable public buildings have the potential to be sites for either district heating or a

426

?6 and ?8 infrared bands and force field of disilane  

Science Journals Connector (OSTI)

The infrared absorption spectrum of the ?6 and ?8 bands of disilane (Si2H6) was recorded at medium resolution (0.1-0.05 cm?1). A rotation analysis of the P(J) and R(J) structure of ?6 was carried out, yielding the band origin and information on the B constant of the ground and v6 = 1 states of the molecule, and on the DJ centrifugal distortion constant. About 400 transitions of the ?8 band were assigned and analysed, giving information on the band origin and the rotational constants of the v8 = 1 state. Using the new and previous information on the vibrational spectrum of Si2H6 and Si2D6, a force constant refinement was performed. Several force field models were tried and a discussion of the results is presented.

Aida Ben Altabef; Rafael Escribano

1992-01-01T23:59:59.000Z

427

Engineering the Electronic Band Structure for Multiband Solar Cells  

E-Print Network (OSTI)

Band Structure for Multiband Solar Cells N. López 1 , L. A.a number of new concepts of solar cells have been proposed.successful approach several solar cells using semiconductors

Lopez, N.

2011-01-01T23:59:59.000Z

428

An X-Band Gun Test Area at SLAC  

SciTech Connect

The X-Band Test Area (XTA) is being assembled in the NLCTA tunnel at SLAC to serve as a test facility for new RF guns. The first gun to be tested will be an upgraded version of the 5.6 cell, 200 MV/m peak field X-band gun designed at SLAC in 2003 for the Compton Scattering experiment run in ASTA. This new version includes some features implemented in 2006 on the LCLS gun such as racetrack couplers, increased mode separation and elliptical irises. These upgrades were developed in collaboration with LLNL since the same gun will be used in an injector for a LLNL Gamma-ray Source. Our beamline includes an X-band acceleration section which takes the electron beam up to 100 MeV and an electron beam measurement station. Other X-Band guns such as the UCLA Hybrid gun will be characterized at our facility.

Limborg-Deprey, C.; Adolphsen, C.; Chu, T.S.; Dunning, M.P.; Jobe, R.K.; Jongewaard, E.N.; Hast, C.; Vlieks, A.E.; Wang, F.; Walz, D.R.; /SLAC; Marsh, R.A.; Anderson, S.G.; Hartemann, F.V.; Houck, T.L.; /LLNL, Livermore

2012-09-07T23:59:59.000Z

429

Synthesis of binary images from band-limited functions  

Science Journals Connector (OSTI)

Binary images usually are produced by clipping band-limited images generated through physical systems. We examine the conditions under which a prescribed image can be formed by this...

Nashold, Karen M; Rudin, Walter; Saleh, Bahaa E A; Bucklew, James A

1989-01-01T23:59:59.000Z

430

Direct observation of a dispersionless impurity band in hydrogenated graphene  

E-Print Network (OSTI)

We show with angle-resolved photoemission spectroscopy that a new energy band appears in the electronic structure of electron-doped hydrogenated monolayer graphene (H-graphene). Its occupation can be controlled with the ...

Haberer, D.

431

ARM - Field Campaign - Radiative Heating in Underexplored Bands...  

NLE Websites -- All DOE Office Websites (Extended Search)

govCampaignsRadiative Heating in Underexplored Bands Campaign (RHUBC) Campaign Links RHUBC Website ARM Data Discovery Browse Data Comments? We would love to hear from you Send us...

432

Band Gap Optimization of Two-Dimensional Photonic Crystals Using ...  

E-Print Network (OSTI)

Jul 10, 2009 ... the dielectric material and the wave vector. .... which SDP can be well applied, thanks to its efficiency and robustness of handling this type of ...... Band diagrams plotted in the figures below show the eigenvalues moving along ...

2009-07-10T23:59:59.000Z

433

Substrate-induced band gap opening in epitaxial graphene  

E-Print Network (OSTI)

H.A. Electronic states of graphene nanoribbons studied withS.G. Louie. Energy gaps in graphene nanoribbons. Phys. Rev.band-gap engineering of graphene nanoribbons. Phys. Rev.

2008-01-01T23:59:59.000Z

434

A New Electronic Band-System of BaCl  

Science Journals Connector (OSTI)

... WE have recently had occasion to photograph the emission spectra of the flames from various pyrotechnic compositions containing barium and chlorine compounds. The well-known green and ultraviolet band-systems ...

R. F. BARROW; D. V. CRAWFORD

1946-03-16T23:59:59.000Z

435

Synthesis of electromagnetic modes in photonic band gap fibers  

E-Print Network (OSTI)

In this paper, we report on the successful synthesis of three individual modes, HE11, TEo0, and TE02 for transmission in photonic band gap fibers at near infrared wavelengths. We measure the propagation losses of the HE11 ...

Hu, Qichao

2007-01-01T23:59:59.000Z

436

Environmental influences on skeletal banding in eastern Pacific (Panama) corals  

Science Journals Connector (OSTI)

The timing of skeletal band formation and concomitant changes in calcification rates and linear skeletal extension were investigated in Pavona...corals growing under two distinct thermal regimes along the Pacific...

Gerard M. Wellington; Peter W. Glynn

1983-05-01T23:59:59.000Z

437

Global estimation of precipitation using opaque microwave bands  

E-Print Network (OSTI)

This thesis describes the use of opaque microwave bands for global estimation of precipitation rate. An algorithm was developed for estimating instantaneous precipitation rate for the Advanced Microwave Sounding Unit (AMSU) ...

Chen, Frederick Wey-Min, 1975-

2004-01-01T23:59:59.000Z

438

Shape coexistence and band crossings in Pt174  

Science Journals Connector (OSTI)

High-spin states in Pt174 were populated via the Mo92(Sr84,2p) and Mo92(Sr84,2p2n) reactions. The ground-state band has been extended from I=14 to 24 (tentatively 26) and a new side band is observed up to a spin of 21 (tentatively 23). A low-frequency crossing is observed in the latter band at a rotational frequency that is similar to that seen in the ground-state band. The first and second i13?2 neutron alignments are also observed in Pt174. Surprisingly, these crossings occur at approximately the same frequency. Total Routhian surface and cranked shell model calculations are used in an attempt to understand this behavior.

J. TM. Goon; D. J. Hartley; L. L. Riedinger; M. P. Carpenter; F. G. Kondev; R. V. F. Janssens; K. H. Abu Saleem; I. Ahmad; H. Amro; J. A. Cizewski; C. N. Davids; M. Danchev; T. L. Khoo; A. Heinz; T. Lauritsen; W. C. Ma; G. L. Poli; J. Ressler; W. Reviol; D. Seweryniak; M. B. Smith; I. Wiedenhöver; Jing-ye Zhang

2004-07-15T23:59:59.000Z

439

Phenomenological band structure model of magnetic coupling in semiconductors  

E-Print Network (OSTI)

Phenomenological band structure model of magnetic coupling in semiconductors Gustavo M. Dalpian a,1­18]. Several models have been proposed to explain the phenomena, including the phenomenological Zener

Gong, Xingao

440

Comparative cytotaxonomy in the tribe Bovini studied by banding techniques  

E-Print Network (OSTI)

Committee: Dr. James E. Womack Chromosomes of eight species of the tribe Bovini were studied by G ? banding, C ? banding and silver staining techniques. The results of this comparative cytogenetic study support the theory that Robertsonian fusion... in the tribe Bovini whose species appear to differ by a series of centromeric fusions. The phylogenetic tree derived from the cytogenetic data of this study is not consistent with morphological and behavioral trees previously described for the tribe Bovini...

Rich, Donna Carol

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "band axis orientation" 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

Liquid phase epitaxial growth and characterization of germanium far infrared blocked impurity band detectors  

SciTech Connect

Germanium Blocked Impurity Band (BIB) detectors require a high purity blocking layer (< 10{sup 13} cm{sup -3}) approximately 1 mm thick grown on a heavily doped active layer ({approx} 10{sup 16} cm{sup -3}) approximately 20 mm thick. Epilayers were grown using liquid phase epitaxy (LPE) of germanium out of lead solution. The effects of the crystallographic orientation of the germanium substrate on LPE growth modes were explored. Growth was studied on substrates oriented by Laue x-ray diffraction between 0.02{sup o} and 10{sup o} from the {l_brace}111{r_brace} toward the {l_brace}100{r_brace}. Terrace growth was observed, with increasing terrace height for larger misorientation angles. It was found that the purity of the blocking layer was limited by the presence of phosphorus in the lead solvent. Unintentionally doped Ge layers contained {approx}10{sup 15} cm{sup -3} phosphorus as determined by Hall effect measurements and Photothermal Ionization Spectroscopy (PTIS). Lead purification by vacuum distillation and dilution reduced the phosphorus concentration in the layers to {approx} 10{sup 14} cm{sup -3} but further reduction was not observed with successive distillation runs. The graphite distillation and growth components as an additional phosphorus source cannot be ruled out. Antimony ({approx}10{sup 16} cm{sup -3}) was used as a dopant for the active BIB layer. A reduction in the donor binding energy due to impurity banding was observed by variable temperature Hall effect measurements. A BIB detector fabricated from an Sb-doped Ge layer grown on a pure substrate showed a low energy photoconductive onset ({approx}6 meV). Spreading resistance measurements on doped layers revealed a nonuniform dopant distribution with Sb pile-up at the layer surface, which must be removed by chemomechanical polishing. Sb diffusion into the pure substrate was observed by Secondary Ion Mass Spectroscopy (SIMS) for epilayers grown at 650 C. The Sb concentration at the interface dropped by an order of magnitude over {approx} 1.5 {micro}m. Layers grown at 550 C did not show significant Sb diffusion. Sn doped In{sub 2}O{sub 3} (ITO) was studied for use in far infrared transparent low temperature contacts for BIB arrays. It was found that {approx}100 nm of ITO deposited on Ge remains electrically conducting at 4 K and is {approx}90% transparent in the far infrared. ITO should be suitable for passivating contacts to Ge BIB arrays.

Bandaru, Jordana

2001-05-12T23:59:59.000Z

442

The relationships of action control orientation and coping strategies to depression and anxiety  

E-Print Network (OSTI)

oriention then what are the descriptive components of state oriention? State orientation refers to the tendency to become fixated with one temporal aspect of the 'change requiring' situation, i. e. , the past, present, or future aspects of the situation...

Cargill, Byron Richard

1990-01-01T23:59:59.000Z

443

A framework for verifying service-oriented software systems using message sequence charts  

E-Print Network (OSTI)

KM05]. Many service-oriented architectures exist today suchover a service-oriented architecture. II.J System Propertiesservice-oriented systems. V.A.1.a Eclipse’s Plug-in Architecture

Morales-Perea, Ernesto Emiliano

2007-01-01T23:59:59.000Z

444

Applying Service Oriented Architecture in the Aerospace Industry Jurga Kazlauskaite, Arsalan Minhas, F. H. Vogt  

E-Print Network (OSTI)

1 Applying Service Oriented Architecture in the Aerospace Industry Jurga Kazlauskaite, Arsalan efficiently working Service Oriented Architecture for cross enterprise business processes and stresses. Key words: Service Oriented Architecture, cross enterprise business processes, verification, security

Turau, Volker

445

Towards a Service-Oriented Architecture for Interactive Ubiquitous Entertainment Systems  

E-Print Network (OSTI)

Towards a Service-Oriented Architecture for Interactive Ubiquitous Entertainment Systems Giovanni introduce a service-oriented architecture for ubiquitous entertainment systems to establish collaborative. Keywords: ubiquitous entertainment, service-oriented architecture, mobile device. 1 Introduction The vision

Boyer, Edmond

446

Orientation-dependent binding energy of graphene on palladium  

SciTech Connect

Using density functional theory calculations, we show that the binding strength of a graphene monolayer on Pd(111) can vary between physisorption and chemisorption depending on its orientation. By studying the interfacial charge transfer, we have identified a specific four-atom carbon cluster that is responsible for the local bonding of graphene to Pd(111). The areal density of such clusters varies with the in-plane orientation of graphene, causing the binding energy to change accordingly. Similar investigations can also apply to other metal substrates and suggests that physical, chemical, and mechanical properties of graphene may be controlled by changing its orientation.

Kappes, Branden B.; Ebnonnasir, Abbas; Ciobanu, Cristian V. [Department of Mechanical Engineering and Materials Science Program, Colorado School of Mines, Golden, Colorado 80401 (United States)] [Department of Mechanical Engineering and Materials Science Program, Colorado School of Mines, Golden, Colorado 80401 (United States); Kodambaka, Suneel [Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, California 90095 (United States)] [Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, California 90095 (United States)

2013-02-04T23:59:59.000Z

447

Single-band and Dual-band Beam Switching Systems and Offset-fed Beam Scanning Reflectarray  

E-Print Network (OSTI)

The reflectarray has been considered as a suitable candidate to replace the conventional parabolic reflectors because of its high-gain, low profile, and beam reconfiguration capability. Beam scanning capability and multi-band operation...

Lee, Jungkyu

2012-07-16T23:59:59.000Z

448

E-Print Network 3.0 - application oriented structural Sample...  

NLE Websites -- All DOE Office Websites (Extended Search)

Technologies and Information Sciences 6 A Lightweight Formal Framework for Service-Oriented Applications Design Summary: A Lightweight Formal Framework for Service-Oriented...

449

Materialization Strategies in a Column-Oriented DBMS  

E-Print Network (OSTI)

There has been renewed interest in column-oriented database architectures in recent years. For read-mostly query workloads such as those found in data warehouse and decision support applications, ``column-stores'' have ...

Abadi, Daniel J.

2006-11-27T23:59:59.000Z

450

Combining JSD and Cleanroom for Object-Oriented Scenario Specification  

Science Journals Connector (OSTI)

A black box specification process useful for the requirements analysis phase of object-oriented methods is presented. It provides a notation for structuring the description of a system’s external behavior as i...

Marc Frappier; Richard St-Denis

1999-01-01T23:59:59.000Z

451

The stress field in Europe: optimal orientations with confidence limits  

Science Journals Connector (OSTI)

......Apennines, the Southern Tyrrhenian and Cyprus) are characterised by high data densities...Busetti M., Ramella R., Volpi V. Gas seeps linked to salt structures in the...mapping Mediterranean region Middle East natural hazards neotectonics orientation risk assessment......

M. M. C. Carafa; S. Barba

2013-01-01T23:59:59.000Z

452

Optical proximity sensor and orientation control of autonomous, underwater robot  

E-Print Network (OSTI)

Autonomous mobile robots need a reliable means of navigation to reach their target while avoiding collisions. This requires continuous knowledge of the vehicle's position, orientation, and motion as well as a way to identify ...

Lozano, Martin, Jr

2014-01-01T23:59:59.000Z

453

CLOWN as a testbed for concurrent object-oriented concepts  

Science Journals Connector (OSTI)

Petri nets have been considered among the variety of formalisms and theories taken into account for giving a sound semantic basis to (concurrent) object-oriented systems and languages. Pursuing this research direction, we have defined a formalism called ...

Eugenio Battiston; Alfredo Chizzoni; Fiorella De Cindio

2001-05-01T23:59:59.000Z

454

CLOWN as a Testbed for Concurrent Object-Oriented Concepts  

Science Journals Connector (OSTI)

Petri nets have been considered among the variety of formalisms and theories taken into account for giving a sound semantic basis to (concurrent) object-oriented systems and languages. Pursuing this research d...

Eugenio Battiston; Alfredo Chizzoni…

2001-01-01T23:59:59.000Z

455

Memory Usage Inference for Object-Oriented Programs  

E-Print Network (OSTI)

We present a type-based approach to statically derive symbolic closed-form formulae that characterize the bounds of heap memory usages of programs written in object-oriented languages. Given a program with size and alias ...

Nguyen, Huu Hai

456

A training methodology for spatial orientation in spacecraft  

E-Print Network (OSTI)

This thesis investigates a way to use virtual reality techniques to teach space vehicle inhabitants about the configuration of their craft so that their performance in orientation and spatial memory tasks is improved. An ...

Buckland, Daniel Aaron

2006-01-01T23:59:59.000Z

457

Systematic Analysis of Defenses against Return-Oriented Programming  

E-Print Network (OSTI)

Since the introduction of return-oriented programming, increasingly complex defenses and subtle attacks that bypass them have been proposed. Unfortunately the lack of a unifying threat model among code reuse security papers ...

Skowyra, Richard

2013-01-01T23:59:59.000Z

458

Non-Rayleigh scattering by a randomly oriented elongated scatterer  

E-Print Network (OSTI)

The echo statistics of a randomly rough, randomly oriented prolate spheroid that is randomly located in a beampattern are investigated from physics-based principles both analytically and by Monte Carlo methods. This is a ...

Bhatia, Saurav

2012-01-01T23:59:59.000Z

459

Understanding organizational traps in implementing service-oriented architecture  

E-Print Network (OSTI)

One of the major objectives of implementing service-oriented architecture (SOA) is to enhance IS agility and improve IT-business alignment. However, the contradictory experiences about SOA implementation turn out to be a ...

Li, Xitong, Ph. D. Massachusetts Institute of Technology

2013-01-01T23:59:59.000Z

460

Analyzing aquifer driven reservoirs using a computer-oriented approach  

E-Print Network (OSTI)

A new computer-oriented approach for analyzing aquifer driven reservoirs incorporates both geological and historical pressure data to determine original hydrocarbons-in-place and to forecast production. This new approach does not rely entirely...

Flumerfelt, Raymond William

1996-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "band axis orientation" 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

Object-oriented abstractions for communication in parallel programs  

E-Print Network (OSTI)

This thesis details ARMI, a parallel communication library that provides an advanced implementation of the remote method invocation protocol (RMI), which is well suited to object-oriented programs. ARMI is a framework for expressing fine...

Saunders, Steven Mack

2012-06-07T23:59:59.000Z

462

Role of build orientation in layered manufacturing: a review  

Science Journals Connector (OSTI)

Layered manufacturing, also called rapid prototyping or additive manufacturing is a revolutionary development in the field of manufacturing processes in last two decades. Unlike material removed from a stock in the machining process, layered manufacturing builds the solid volume from a CAD model by successively adding material layer by layer. Since parts are fabricated layer by layer, build orientation plays a critical role in the layered manufacturing process as it can improve part quality in terms of accuracy and surface finish, reduce the support volume required, support contact area and build time. It also affects the part strength and cost of manufacturing. This paper presents review of various strategies developed to decide the optimum part build orientation based on different criteria and related issues. This paper also discusses the effect of build orientation on fabricated parts and future directions to improve part quality by selecting suitable and feasible build orientation.

Mohammad Taufik; Prashant K. Jain

2013-01-01T23:59:59.000Z

463

A multisensory observer model for human spatial orientation perception  

E-Print Network (OSTI)

Quantitative "observer" models for spatial orientation and eye movements have been developed based on 1-G data from humans and animals (e.g. Oman 1982, 1991, Merfeld, et al 1993, 2002; Haslwanter 2000, Vingerhoets 2006). ...

Newman, Michael C. (Michael Charles)

2009-01-01T23:59:59.000Z

464

Equation-Based Object-Oriented Modeling Languages and Tools  

Science Journals Connector (OSTI)

EOOLT 2010 was the third edition of the EOOLT workshop series. The workshop is intended to bring together researchers and practitioners fromdifferent equation-based object-oriented (EOO) modeling language comm...

Peter Fritzson; Edward A. Lee; François E. Cellier…

2011-01-01T23:59:59.000Z

465

Equation-Based Object-Oriented Languages and Tools  

Science Journals Connector (OSTI)

EOOLT’2008 was the second edition of the ECOOP-EOOLT workshop. The workshop is intended to bring researchers associated with different equation-based object-oriented (EOO) modeling languages and different appl...

Peter Fritzson; David Broman…

2009-01-01T23:59:59.000Z

466

Equation-Based Object-Oriented Languages and Tools  

Science Journals Connector (OSTI)

EOOLT'2008 was the second edition of the ECOOP-EOOLT workshop. The workshop is intended to bring researchers associated with different equation-based object-oriented (EOO) modeling languages and different application areas making use of such languages ...

Peter Fritzson; David Broman; François Cellier

2008-05-01T23:59:59.000Z

467

E-Print Network 3.0 - affecting band 7q36 Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

band 4... -orbiting weather satellites, and the leasing of a meteorological C-band radar. Weather satellite data have been Source: Rose, William I. - Department of Geological...

468

Direct synthesis and easy axis alignment of L1{sub 0}-FePt nanoparticles  

SciTech Connect

Partially ordered Fe{sub 53}Pt{sub 47} nanoparticles with size around 8 nm were prepared by the simultaneous decomposition of iron pentacarbonyl and platinum acetylacetonate. The high boiling point chemical, hexadecylamine, was used as a solvent, and 1-adamantanecarboxylic acid was used as a stabilizer. The reflux temperature of the solution could exceed 360 deg. C, where disordered FePt particles could be partially transformed into the ordered L1{sub 0} phase. A nonmagnetic mechanical stirrer was used in order to avoid agglomeration of the fct-FePt particles during synthesis. The particles were dispersed in toluene and films of the particles were cast onto silicon wafers from the solution. X-ray diffraction patterns of as-made samples showed weak superlattice peaks, indicating partial chemical ordering of the Fe{sub 53}Pt{sub 47} particles. The room-temperature hysteresis loop of the as-made sample reveals a small coercivity ({approx}600 Oe) because of thermal fluctuations; however, the loop is wide open and hard to saturate. The remanence coercivity from the dcd curve is about 2.5 kOe, which is four times larger than the hysteresis coercivity. The large remanent to hysteresis coercivity ratio and the shapes of the hysteresis loop and dcd curve suggest a broad distribution of anisotropies in the partially ordered particles. By coating the ordered nanoparticles with a polymer binder, the easy axis of the particles could be aligned under an external field.

Kang Shishou; Jia Zhiyong; Shi Shifan; Nikles, David E.; Harrell, J.W. [Center for Materials for Information Technology, University of Alabama, Tuscaloosa, Alabama 35487-0209 (United States)

2005-05-15T23:59:59.000Z

469

A study of the abundance distributions along the minor axis of the Galactic bulge  

Science Journals Connector (OSTI)

I report the preliminary results of a project in collaboration with R. Michael Rich (Columbia) where we derive heavy element abundances for hundreds of K?giants in seven windows of low extinction along or near the minor axis of the Galactic bulge. By using the recently?calibrated Washington photometric filter system the distribution function in [Fe/H] is determined for each field. Within 8° of the Galactic center (?1 kpc) our data are consistent with no gradient in the distribution of [Fe/H] which may hint to a dissipationless collapse and/or sufficient mixing during the star?forming epoch when Fe was produced in the bulge. The mean abundance over this region is between two and five times solar. The form of these distributions is well?fitted by the simple (closed box) model of chemical evolution where the bulge is self?enriched by processing its original gas content to completion. Beyond 8° from the Galactic center our data show that the mean of the abundance distributions drops precipitously. This is consistent with the notion that the inner bulge is chemically distinct from the halo. It may be possible to use kinematics to disentangle the two populations via a radial velocity survey.

Neil D. Tyson

1992-01-01T23:59:59.000Z

470

Horizontal-axis wind-system rotor performance model comparison: a compendium  

SciTech Connect

This compendium consists of four reports, the purpose of which is to evaluate performance prediction methods for horizontal-axis wind turbines. The reports were prepared by four separate contractors. Oregon State University, AeroVironment, Inc., Aerospace Systems, Inc., and United Technologies Research Center (UTRC). Three of the four contractors used a blade-element/momentum analysis, while the fourth (UTRC) utilized a lifting line/prescribed wake analysis. These contractors were to apply their prediction methods to two rotors, that of the Enertech 1500 and that of the 1/3-scale UTRC 8 kW turbines. Results from the four prediction methods are compared with actual test data gathered via Controlled Velocity Testing (CVT), carried out by the Rocky Flats Wind Energy Research Center, operated by Rockwell International for the US Department of Energy. The conclusions of the four reports are reviewed in an introduction prepared by Rockwell International. For the Enertech 1500, rotor performance predictions closely agreed with CVT data. Yet, because of the lack of high tip speed ratio data, verification of the Glauert momentum theory was not possible. Predictions regarding the UTRC 1/3 scale 8 kW rotor did not agree well with test results. The reasons cited for the discrepancies center on inadequate airfoil section data and the varying blade pitch angles of the unique UTRC flexbeam rotor.

Not Available

1983-02-01T23:59:59.000Z

471

A numerical method for calculation of power output from ducted vertical axis hydro-current turbines  

Science Journals Connector (OSTI)

Abstract This paper investigates effects of ducting on power output from vertical axis hydro-current turbines. A numerical two-dimensional method based on the potential flow theory is developed for calculation of non-dimensional power output from these turbines. In this method, the blades are represented by vortex filaments. The vortex shedding from the blades is modeled by discrete vortices. A boundary element method is used to incorporate the duct shape which is represented by a series of panels with constant distributions of sources and doublets. The aerodynamic loading on the blades are calculated using a quasi-steady modeling. A time-marching scheme is used for implementation of the numerical method. The results of this method are compared with experimental results for a turbine model. A good correlation between the numerical and experimental results is obtained for tip speed ratios equal and higher than 2.25. However due to a lack of dynamic stall modeling, the numerical method is not able to predict power output accurately at lower tip speed ratios wherein effects of dynamic stall are significant. Both numerical and experimental results also showed that the power output from a turbine can increase significantly when it is enclosed within a well-designed duct. The maximum power output of the turbine model investigated in this paper showed a 74% increase when the turbine is operating within the duct relative to the case it is in free-stream conditions.

Mahmoud Alidadi; Sander Calisal

2014-01-01T23:59:59.000Z

472

Evaluation of servo, geometric and dynamic error sources on five axis high-speed machine tool  

E-Print Network (OSTI)

Many sources of errors exist in the manufacturing process of complex shapes. Some approximations occur at each step from the design geometry to the machined part. The aim of the paper is to present a method to evaluate the effect of high speed and high dynamic load on volumetric errors at the tool center point. The interpolator output signals and the machine encoder signals are recorded and compared to evaluate the contouring errors resulting from each axis follow-up error. The machine encoder signals are also compared to the actual tool center point position as recorded with a non-contact measuring instrument called CapBall to evaluate the total geometric errors. The novelty of the work lies in the method that is proposed to decompose the geometric errors in two categories: the quasi-static geometric errors independent from the speed of the trajectory and the dynamic geometric errors, dependent on the programmed feed rate and resulting from the machine structure deflection during the acceleration of its axes...

Andolfatto, Loïc; Mayer, René

2011-01-01T23:59:59.000Z

473

Darrieus vertical axis wind turbine for power generation I: Assessment of Darrieus VAWT configurations  

Science Journals Connector (OSTI)

Abstract This paper aims to assess the Darrieus vertical axis wind turbine (VAWT) configurations, including the drawbacks of each variation that hindered the development into large scale rotor. A comprehensive timeline is given as a lineage chart. The variations are assessed on the performance, components and operational reliability. In addition, current development and future prospects of Darrieus VAWT are presented. The Darrieus VAWT patented in France in 1925 and in the US in 1931 had two configurations: (i) curved blades and (ii) straight blades configurations. Curved blades configuration (egg-beater or phi-rotor) has evolved from the conventional guy-wires support into fixed-on-tower and cantilevered versions. Straight blades configuration used to have variable-geometry (Musgrove-rotor), variable-pitch (Giromill), Diamond, Delta and V/Y rotor variations. They were stopped due to low economical value, i.e. high specific cost of energy (COE). Musgrove-rotor has evolved into fixed-pitch straight-bladed H-rotor (referred as H-rotor in this paper for simplicity). H-rotor, in turn, has evolved into several variations: Articulating, Tilted and Helical H-rotors.

Willy Tjiu; Tjukup Marnoto; Sohif Mat; Mohd Hafidz Ruslan; Kamaruzzaman Sopian

2015-01-01T23:59:59.000Z

474

Experimental research on tidal current vertical axis turbine with variable-pitch blades  

Science Journals Connector (OSTI)

Abstract Due to the limited storage and ever-increasing dependence on fossil fuel, the world is in the phase of shifting toward renewable energy. Tidal current energy is one of the most predictable forms of renewable energy, which is harnessed by utilizing a tidal current turbine. To study the performance of the tidal current turbine relating to the ability of energy absorption and exchanging, experimental tests play an important role which can not only validate the numerical results but also provide a reference for the prototype design. In this study, a series of experiments related to vertical-axis turbines (VAT) were carried out at Harbin Engineering University and a large quantity of experimental data to study the hydrodynamic performance of turbines was presented. Based on the different techniques used to control the pitch mechanism, the experiments can be classified as the cycloid type controllable-pitch, spring-control pitch and passive variable-pitch VAT experiment. The influences of the different parameters on the hydrodynamic performance of turbines were discussed. Finally, some control strategies for the blade for different turbines were given.

Fengmei Jing; Qihu Sheng; Liang Zhang

2014-01-01T23:59:59.000Z

475

Applying micro scales of horizontal axis wind turbines for operation in low wind speed regions  

Science Journals Connector (OSTI)

Abstract Utilizing the micro scales of wind turbines could noticeably supply the demand for the electricity in low wind speed regions. Aerodynamic design and optimization of the blade, as a main part of a wind turbine, were addressed in the study. Three micro scales of horizontal axis wind turbines with output power of 0.5, 0.75 and 1 kW were considered and the geometric optimization of the blades in terms of the two involved parameters, chord and twist, was undertaken. In order to improve the performance of the turbines at low wind speeds, starting time was included in an objective function in addition to the output power – the main and desirable goal of the wind turbine blade design. A purpose-built genetic algorithm was employed to maximize both the output power and the starting performance which were calculated by the blade-element momentum theory. The results emphasize that the larger values of the chord and twist at the root part of the blades are indispensable for the better performance when the wind speed is low. However, the noticeable value of the generator resistive torque could largely delay the starting of the micro-turbines especially for the considered smaller size, 0.5 kW, where the starting aerodynamic torque could not overcome the generator resistive torque. For that size, an increase in the number of blades improved both the starting performance and also output power.

Abolfazl Pourrajabian; Reza Ebrahimi; Masoud Mirzaei

2014-01-01T23:59:59.000Z

476

Turbulence effects on the wake flow and power production of a horizontal-axis wind turbine  

Science Journals Connector (OSTI)

Abstract This study experimentally investigated the effects of ambient turbulence on the wake flows and power production of a horizontal-axis wind turbine. The approaching flows included low-turbulence smooth flow and grid-generated turbulent flow. The profiles of time-averaged velocity, turbulence intensity and Reynolds stress from the intermediate to the far-wake regions were measured and compared for smooth and turbulent flows. Based on the measured data, prediction models for the centerline velocity deficit, turbulence intensity, wake radius and velocity profile were proposed. In addition, the experimental results showed that the power productions in the grid-generated turbulent flows were slightly higher than that in the smooth flow. But the power loss due to the velocity deficit in the wake flow was larger than 50% when the downwind distance was less than 12D (D is the rotor diameter). An empirical relation between the power production and the downwind distance x and lateral distance y was proposed.

Chia-Ren Chu; Pei-Hung Chiang

2014-01-01T23:59:59.000Z

477

The development of a cognitive process-oriented correlation model  

E-Print Network (OSTI)

OF SCIENCE December 1988 Major Subject: Curriculum and Instruction THE DEVELOPMENT OF A COGNITIVE PROCESS-ORIENTED CORRELATION MODEL A Thesis by RICHARD JAMES KNEUVEN Approved as to style and content by: P r c'a exander ( r of Committee ) David...-processing correlation model might be translated into a secondary school curriculum. In an attempt to identify underlying cognitive processes that could provide a basis for a process-oriented correlation model, several areas of literature were reviewed. This thesis...

Kneuven, Richard James

1988-01-01T23:59:59.000Z

478

Environmental uncertainty and social value orientation in resource dilemmas  

E-Print Network (OSTI)

research has shown that both environmental uncertainty and social value orientation (cooperators vs. noncooperators) will affect harvest sizes from a common resource pool. However, these two variables have not been simultaneously explored.... In the present experiment, 172 subjects harvested units from a common resource pool over 20 twenty trials. It was predicted that noncooperators would harvest more than cooperators (Hypothesis 1), an interaction between social value orientation and uncertainty...

Roch, Sylvia Gabriele

1994-01-01T23:59:59.000Z

479

Distributed parameter hydrologic modeling usinsg object-oriented simulation  

E-Print Network (OSTI)

DISTRIBUTED PARAMETER HYDROLOGIC MODELING USING OBJECT-ORIENTED SIMULATION A Thesis by KENNETH RAY KLANIKA Submitted to Texas A&M University in partial fulfilhnent of the requirements for the degree of MASTER OF SCIENCE Approved as to style...). The Geographic Object-Oriented Simulation Environment [GOOSE] is linked with GRASS, and is used to create the basic patch network from GRASS ASCII vector and attribute files. The model, written in Common Lisp Object System [CLOS] language, was designed around...

Klanika, Kenneth Ray

2012-06-07T23:59:59.000Z

480

Potential order-of-magnitude enhancement of wind farm power density via counter-rotating vertical-axis wind  

E-Print Network (OSTI)

Potential order-of-magnitude enhancement of wind farm power density via counter-rotating vertical constraint limits the amount of power that can be extracted from a given wind farm footprint. The resulting-axis wind turbines (VAWTs) in order to achieve higher power output per unit land area than existing wind

Dabiri, John O.

Note: This page contains sample records for the topic "band axis orientation" 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

Precision tool holder with flexure-adjustable, three degrees of freedom for a four-axis lathe  

DOE Patents (OSTI)

A precision tool holder for precisely positioning a single point cutting tool on 4-axis lathe, such that the center of the radius of the tool nose is aligned with the B-axis of the machine tool, so as to facilitate the machining of precision meso-scale components with complex three-dimensional shapes with sub-.mu.m accuracy on a four-axis lathe. The device is designed to fit on a commercial diamond turning machine and can adjust the cutting tool position in three orthogonal directions with sub-micrometer resolution. In particular, the tool holder adjusts the tool position using three flexure-based mechanisms, with two flexure mechanisms adjusting the lateral position of the tool to align the tool with the B-axis, and a third flexure mechanism adjusting the height of the tool. Preferably, the flexures are driven by manual micrometer adjusters. In this manner, this tool holder simplifies the process of setting a tool with sub-.mu.m accuracy, to substantially reduce the time required to set the tool.

Bono, Matthew J. (Pleasanton, CA); Hibbard, Robin L. (Livermore, CA)

2008-03-04T23:59:59.000Z

482

Possibility of c-axis voltage steps for a cuprate superconductor in a resonant cavity I. Tornes* and D. Stroud  

E-Print Network (OSTI)

, when driven by currents parallel to the c axis, behave like stacks of underdamped Josephson junctions's in stacks of artificial Josephson junctions. We conclude that such steps might be observable with a suitably, 74.25.Nf I. INTRODUCTION Barbara et al.1 have recently shown that underdamped Josephson-junction

Stroud, David

483

First Light of the 1.6 meter off-axis New Solar Telescope at Big Bear Solar Observatory  

E-Print Network (OSTI)

First Light of the 1.6 meter off-axis New Solar Telescope at Big Bear Solar Observatory Wenda Caoab, Nicolas Gorceixb, Roy Coulterb, Aaron Coulterb, Philip R. Goodeab aCenter for Solar-Terrestrial Research, New Jersey Institute of Technology, 323 Martin Luther King Blvd., Newark, NJ 07102; bBig Bear Solar

484

Thematic Week: The Role of Market Instruments in Integrated Water Management Thematic Axis: 7. Water Economics and Financing  

E-Print Network (OSTI)

Thematic Week: The Role of Market Instruments in Integrated Water Management Thematic Axis: 7. Water Economics and Financing Title: Beyond Water Marketing Myths Author: Griffin, Ronald C. Department://ron-griffin.tamu.edu, 979-845-7049. Summary: The challenge in isolating the opportunities and pitfalls of water marketing

Griffin, Ronald

485

Measurement of valence band structure in arbitrary dielectric films  

SciTech Connect

A new way of measuring the band structure of various dielectric materials using the secondary electron emission from Auger neutralization of ions is introduced. The first example of this measurement scheme is the magnesium oxide (MgO) films with respect to the application of the films in the display industries. The density of state in the valence bands of MgO film and MgO film with a functional layer (FL) deposited over a dielectric surface reveals that the density peak of film with a FL is considerably less than that of film, thereby indicating a better performance of MgO film with functional layer in display devices. The second example of the measurement is the boron-zinc oxide (BZO) films with respect to the application of the films to the development of solar cells. The measurement of density of state in BZO film suggests that a high concentration of boron impurity in BZO films may enhance the transition of electrons and holes through the band gap from the valence to the conduction band in zinc oxide crystals; thereby improving the conductivity of the film. Secondary electron emission by the Auger neutralization of ions is highly instrumental for the determination of the density of states in the valence band of dielectric materials.

Uhm, Han S., E-mail: hsuhm@kw.ac.kr [Department of Electrophysics, Kwangwoon University, 447-1 Wolgye-Dong, Nowon-Gu, Seoul 139-701 (Korea, Republic of); Choi, Eun H. [Department of Electrophysics, Kwangwoon University, 447-1 Wolgye-Dong, Nowon-Gu, Seoul 139-701 (Korea, Republic of)] [Department of Electrophysics, Kwangwoon University, 447-1 Wolgye-Dong, Nowon-Gu, Seoul 139-701 (Korea, Republic of)

2012-10-15T23:59:59.000Z

486

SEXUAL ORIENTATION IN WOMEN 71 The Development of Sexual Orientation in Women  

E-Print Network (OSTI)

Throughout this century, most theorizing and empirical research about women's sexual orientation have been guided by a belief in the essential masculinity of lesbians and the femininity of heterosexual women. This view can be traced to the influential inversion theories of 19th-century sexologists such as Richard von Krafft-Ebing and Havelock Ellis. Viewing heterosexuality as the biological norm, these scholars believed that homosexuality results from a biological abnor-mality that leads to gender-atypical ("inverted") sexual attractions and personality. Although there were differences among the various inversion theories, they shared three core elements. First and foremost, inversion theorists characterized heterosexual women as feminine and lesbians as masculine. In Psychopathia Sexualis, Krafft-Ebing (1908/1950, pp. 398-400) described the most extreme form of female homosexuality as a woman who "possesses of the feminine qualities only the genital

Letitia Anne Peplau; Leah R. Spalding; Terri D; Rosemary; C. Veniegas

487

Correlation of conductivity and angle integrated valence band photoemission  

NLE Websites -- All DOE Office Websites (Extended Search)

Correlation of conductivity and angle integrated valence band photoemission Correlation of conductivity and angle integrated valence band photoemission characteristics in single crystal iron perovskites for 300 K < T < 800 K: Comparison of surface and bulk sensitive methods Title Correlation of conductivity and angle integrated valence band photoemission characteristics in single crystal iron perovskites for 300 K < T < 800 K: Comparison of surface and bulk sensitive methods Publication Type Journal Article Year of Publication 2010 Authors Braun, Artur, Bongjin S. Mun, Yun Sun, Z. Liu, Oliver Gröning, R. Mäder, Selma Erat, Xueyuan Zhang, Samuel S. Mao, Ekaterina Pomjakushina, Kazimierz Conder, and Thomas Graule Journal Journal of Electron Spectroscopy and Related Phenomena Volume 181 Issue 1 Pagination 56-62 Date Published 07/2013

488

W-band ARM Cloud Radar (WACR) Update and Status  

NLE Websites -- All DOE Office Websites (Extended Search)

W-band ARM Cloud Radar (WACR) Update and Status W-band ARM Cloud Radar (WACR) Update and Status PopStefanija, Ivan ProSensing, Inc. Mead, James ProSensing Inc. Widener, Kevin Pacific Northwest National Laboratory Category: Instruments Two W-band ARM Cloud Radars (WACR) have been developed for the SGP and the ARM Mobile Facility (AMF) by ProSensing. The SGP WACR was successfully deployed in the same shelter as the MMCR in 2005. It is currently collecting co-polarization and cross-polarization spectral moments (reflectivity, Doppler velocity, and spectral width) along with spectra data. The AMF WACR will be deployed with the AMF in Niamey, Niger early in 2006. We will present ingested WACR data formats available from the ARM Archive, a selected comparisons of WACR and MMCR data at SGP, and data from

489

W-Band ARM Cloud Radar - Specifications and Design  

NLE Websites -- All DOE Office Websites (Extended Search)

W-Band ARM Cloud Radar - Specifications and Design W-Band ARM Cloud Radar - Specifications and Design K. B. Widener Pacific Northwest National Laboratory Richland, Washington J. B. Mead ProSensing, Inc. Amherst, Massachusetts Abstract The Atmospheric Radiation Measurement (ARM) Program and ProSensing, Inc. have teamed to develop and deploy the W-band ARM Cloud Radar (WACR) at the SGP central facility. The WACR will be co- located with the ARM millimeter wave cloud radar (MMCR) with planned operation to begin in early 2005. This radar will complement the measurements of the MMCR and will aid in filtering out insect contamination in the data. In this poster we present the design goals, expected performance characteristics, and the detailed design for the WACR. Introduction The MMCR has been operating at the Southern Great Plains (SGP) site since 1998. It has proven to be

490

Numerical method for shear bands in ductile metal with inclusions  

SciTech Connect

A numerical method for mesoscale simulation of high strain-rate loading of ductile metal containing inclusions is described. Because of small-scale inhomogeneities, such a composite material is prone to localized shear deformation (adiabatic shear bands). The modeling framework is the Generalized Method of Cells of Paley and Aboudi [Mech. Materials, vol. 14, pp. /27-139, 1992], which ensures that the micromechanical response of the material is reflected in the behavior of the composite at the mesoscale. To calculate the effective plastic strain rate when shear bands are present, the analytic and numerical analysis of shear bands by Glimm, Plohr, and Sharp [Mech. Materials, vol. 24, pp. 31-41, 1996] is adapted and extended.

Plohr, Jee Yeon N [Los Alamos National Laboratory; Plohr, Bradley J [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

491

Anisotropic Circular Dichroism Signatures of Oriented Thylakoid Membranes and Lamellar Aggregates of LHCII  

SciTech Connect

In photosynthesis research, circular dichroism (CD) spectroscopy is an indispensable tool to probe molecular architecture at virtually all levels of structural complexity. At the molecular level, the chirality of the molecule results in intrinsic CD; pigment-pigment interactions in protein complexes and small aggregates can give rise to excitonic CD bands, while 'psi-type' CD signals originate from large, densely packed chiral aggregates. It has been well established that anisotropic CD (ACD), measured on samples with defined non-random orientation relative to the propagation of the measuring beam, carries specific information on the architecture of molecules or molecular macroassemblies. However, ACD is usually combined with linear dichroism and can be distorted by instrumental imperfections, which given the strong anisotropic nature of photosynthetic membranes and complexes, might be the reason why ACD is rarely studied in photosynthesis research. In this study, we present ACD spectra, corrected for linear dichroism, of isolated intact thylakoid membranes of granal chloroplasts, washed unstacked thylakoid membranes, photosystem II (PSII) membranes (BBY particles), grana patches, and tightly stacked lamellar macroaggregates of the main light-harvesting complex of PSII (LHCII). We show that the ACD spectra of face- and edge-aligned stacked thylakoid membranes and LHCII lamellae exhibit profound differences in their psi-type CD bands. Marked differences are also seen in the excitonic CD of BBY and washed thylakoid membranes. Magnetic CD (MCD) spectra on random and aligned samples, and the largely invariable nature of the MCD spectra, despite dramatic variations in the measured isotropic and anisotropic CD, testify that ACD can be measured without substantial distortions and thus employed to extract detailed information on the (supra)molecular organization of photosynthetic complexes. An example is provided showing the ability of CD data to indicate such an organization, leading to the discovery of a novel crystalline structure in macroaggregates of LHCII.

Miloslavina Y.; Hind G.; Lambrev, P. H.; Javorfi, T.; Varkonyi, Z.; Karlicky, V.; Wall, J. S.; Garab, G.

2012-03-01T23:59:59.000Z

492

ATCA/AXIe compatible board for fast control and data acquisition in nuclear fusion experiments  

Science Journals Connector (OSTI)

An in-house development of an Advanced Telecommunications Computing Architecture (ATCA) board for fast control and data acquisition, with Input/Output (IO) processing capability, is presented. The architecture, compatible with the ATCA (PICMG 3.4) and ATCA eXtensions for Instrumentation (AXIe) specifications, comprises a passive Rear Transition Module (RTM) for IO connectivity to ease hot-swap maintenance and simultaneously to increase cabling life cycle. The board complies with ITER Fast Plant System Controller (FPSC) guidelines for rear IO connectivity and redundancy, in order to provide high levels of reliability and availability to the control and data acquisition systems of nuclear fusion devices with long duration plasma discharges. Simultaneously digitized data from all Analog to Digital Converters (ADC) of the board can be filtered/decimated in a Field Programmable Gate Array (FPGA), decreasing data throughput, increasing resolution, and sent through Peripheral Component Interconnect (PCI) Express to multi-core processors in the ATCA shelf hub slots. Concurrently the multi-core processors can update the board Digital to Analog Converters (DAC) in real-time. Full-duplex point-to-point communication links between all FPGAs, of peer boards inside the shelf, allow the implementation of distributed algorithms and Multi-Input Multi-Output (MIMO) systems. Support for several timing and synchronization solutions is also provided. Some key features are onboard ADC or DAC modules with galvanic isolation, Xilinx Virtex 6 FPGA, standard Dual Data Rate (DDR) 3 SODIMM memory, standard CompactFLASH memory card, Intelligent Platform Management Controller (IPMC), two PCI Express x4 (generation 2) ATCA Fabric channels (dual-star topology), eleven Xilinx Aurora x1 (or other ATCA compatible communications protocol) ATCA fabric channels (full-mesh topology) and two Fast Ethernet (Precision Time Protocol – PTP IEEE1588-V2 and Lan eXtensions for Instrumentation – LXI compatible) ATCA base channels (dual-star topology).

A.J.N. Batista; C. Leong; V. Bexiga; A.P. Rodrigues; A. Combo; B.B. Carvalho; J. Fortunato; M. Correia; J.P. Teixeira; I.C. Teixeira; J. Sousa; B. Gonçalves; C.A.F. Varandas

2012-01-01T23:59:59.000Z

493

Structural Design of a Horizontal-Axis Tidal Current Turbine Composite Blade  

SciTech Connect

This paper describes the structural design of a tidal composite blade. The structural design is preceded by two steps: hydrodynamic design and determination of extreme loads. The hydrodynamic design provides the chord and twist distributions along the blade length that result in optimal performance of the tidal turbine over its lifetime. The extreme loads, i.e. the extreme flap and edgewise loads that the blade would likely encounter over its lifetime, are associated with extreme tidal flow conditions and are obtained using a computational fluid dynamics (CFD) software. Given the blade external shape and the extreme loads, we use a laminate-theory-based structural design to determine the optimal layout of composite laminas such that the ultimate-strength and buckling-resistance criteria are satisfied at all points in the blade. The structural design approach allows for arbitrary specification of the chord, twist, and airfoil geometry along the blade and an arbitrary number of shear webs. In addition, certain fabrication criteria are imposed, for example, each composite laminate must be an integral multiple of its constituent ply thickness. In the present effort, the structural design uses only static extreme loads; dynamic-loads-based fatigue design will be addressed in the future. Following the blade design, we compute the distributed structural properties, i.e. flap stiffness, edgewise stiffness, torsion stiffness, mass, moments of inertia, elastic-axis offset, and center-of-mass offset along the blade. Such properties are required by hydro-elastic codes to model the tidal current turbine and to perform modal, stability, loads, and response analyses.

Bir, G. S.; Lawson, M. J.; Li, Y.

2011-10-01T23:59:59.000Z

494

Lattice Boltzmann model for photonic band gap materials  

Science Journals Connector (OSTI)

An efficient technique for computing photonic band structure and defect modes is proposed based on the lattice Boltzmann model. Physically, it is a scheme based on the kinetics of the virtual microscopic process, rather than a solution of the macroscopic Maxwell equations. The method has significant advantages of being naturally suited for massively parallel machine, as well as speed and convenience, providing another methodology for photonic band gap materials and, also, for general electromagnetic scattering problems in open region when incorporated with the perfectly matched layer technique.

Zhifang Lin; Haiping Fang; Jianjun Xu; Jian Zi; Xiangdong Zhang

2003-02-07T23:59:59.000Z

495

Ultra high vacuum broad band high power microwave window  

DOE Patents (OSTI)

An improved high vacuum microwave window has been developed that utilizes high density polyethylene coated on two sides with SiOx, SiNx, or a combination of the two. The resultant low dielectric and low loss tangent window creates a low outgassing, low permeation seal through which broad band, high power microwave energy may be passed. No matching device is necessary and the sealing technique is simple. The features of the window are broad band transmission, ultra-high vacuum compatibility with a simple sealing technique, low voltage standing wave ratio, high power transmission and low cost.

Nguyen-Tuong, Viet (Seaford, VA); Dylla, III, Henry Frederick (Yorktown, VA)

1997-01-01T23:59:59.000Z

496

Ultra high vacuum broad band high power microwave window  

DOE Patents (OSTI)

An improved high vacuum microwave window has been developed that utilizes high density polyethylene coated on two sides with SiOx, SiNx, or a combination of the two. The resultant low dielectric and low loss tangent window creates a low outgassing, low permeation seal through which broad band, high power microwave energy may be passed. No matching device is necessary and the sealing technique is simple. The features of the window are broad band transmission, ultra-high vacuum compatibility with a simple sealing technique, low voltage standing wave ratio, high power transmission and low cost. 5 figs.

Nguyen-Tuong, V.; Dylla, H.F. III

1997-11-04T23:59:59.000Z

497

Electronic band structure of magnetic bilayer graphene superlattices  

SciTech Connect

Electronic band structure of the bilayer graphene superlattices with ?-function magnetic barriers and zero average magnetic flux is studied within the four-band continuum model, using the transfer matrix method. The periodic magnetic potential effects on the zero-energy touching point between the lowest conduction and the highest valence minibands of pristine bilayer graphene are exactly analyzed. Magnetic potential is shown also to generate the finite-energy touching points between higher minibands at the edges of Brillouin zone. The positions of these points and the related dispersions are determined in the case of symmetric potentials.

Pham, C. Huy; Nguyen, T. Thuong [Theoretical and Computational Physics Department, Institute of Physics, VAST, 10 Dao Tan, Ba Dinh Distr., Hanoi 10000 (Viet Nam); SISSA/International School for Advanced Study, Via Bonomea 265, I-34136 Trieste (Italy); Nguyen, V. Lien, E-mail: nvlien@iop.vast.ac.vn [Theoretical and Computational Physics Department, Institute of Physics, VAST, 10 Dao Tan, Ba Dinh Distr., Hanoi 10000 (Viet Nam); Institute for Bio-Medical Physics, 109A Pasteur, 1st Distr., Hochiminh City (Viet Nam)

2014-09-28T23:59:59.000Z

498

CREATING SPECIFICATION TEMPLATES FOR CLIENT-SERVER FAMILIES IN SERVICE ORIENTED ARCHITECTURE  

E-Print Network (OSTI)

CREATING SPECIFICATION TEMPLATES FOR CLIENT-SERVER FAMILIES IN SERVICE ORIENTED ARCHITECTURE-SERVER FAMILIES IN SERVICE ORIENTED ARCHITECTURE by Jaya Bansal has been approved July 2009 Graduate Supervisory-Server Based Service Oriented Architecture...............................9 2.4 Multi-tier Service Oriented

499

Between Service Science and Service-Oriented Software Systems Faculty of Computer Science  

E-Print Network (OSTI)

the concept of Service Oriented Architecture (SOA) has become prominent. Services can be regarded at a higher for a service-oriented system; · The guidelines of service-oriented system design; and · Reference architecture1 Between Service Science and Service-Oriented Software Systems Yuhong Yan Faculty of Computer

Yan, Yuhong

500

Service Oriented Architecture Definition Using Composition of BusinessDriven Fragments  

E-Print Network (OSTI)

Service Oriented Architecture Definition Using Composition of Business­Driven Fragments S. Services Oriented Architecture are built through the compo- sition of services (e.g. Web Services to implement scalable Soa (Services Oriented Architecture, [2]) under the Wsoa acronym (Web Services Oriented

Paris-Sud XI, Université de