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1

Definition: Interferometric Synthetic Aperture Radar | Open Energy  

Open Energy Info (EERE)

Interferometric Synthetic Aperture Radar Interferometric Synthetic Aperture Radar Jump to: navigation, search Dictionary.png Interferometric Synthetic Aperture Radar Interferometric Synthetic Aperture Radar (InSAR) utilizes SAR images from two different time periods to generate maps of surface deformation. The technique can potentially measure millimeter-scale changes in the Earth's surface.[1][2] View on Wikipedia Wikipedia Definition Also Known As InSAR, IfSAR Related Terms Synthetic Aperture Radar, radar, sustainability References ↑ Synthetic Aperture Radar Interferometry to Measure Earth's Surface Topography and Its Deformation (Burgmann et al. 2000) ↑ Improved Visulaization of Satellite Radar InSAR Observed Structural Controls at Producing Geothermal Field Using Modeled Horizontal Surface Displacements(Opplinger et al. 2006)

2

Definition: Synthetic Aperture Radar | Open Energy Information  

Open Energy Info (EERE)

Aperture Radar Aperture Radar Jump to: navigation, search Dictionary.png Synthetic Aperture Radar Synthetic-aperture radar (SAR) is an active microwave remote sensing technology that measures the phase difference between a radar wave emitted from an antennae attached to a satellite or aircraft to generate high-resolution images of a surface.[1] View on Wikipedia Wikipedia Definition Also Known As SAR Related Terms radar References ↑ Synthetic Aperature Radar: Systems and Signal Processing (Curlander and McDonough - 1991 - book) fue LikeLike UnlikeLike You like this.Sign Up to see what your friends like. l cell, Retrieved from "http://en.openei.org/w/index.php?title=Definition:Synthetic_Aperture_Radar&oldid=493069" Category: Definitions What links here Related changes

3

Iterative synthetic aperture radar imaging algorithms  

E-Print Network [OSTI]

Synthetic aperture radar is an important tool in a wide range of civilian and military imaging applications. This is primarily due to its ability to image in all weather conditions, during both the day and the night, ...

Kelly, Shaun Innes

2014-06-30T23:59:59.000Z

4

E-Print Network 3.0 - acoustics synthetic aperture Sample Search...  

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

Synthetic aperture focusing... Introduction Synthetic aperture focusing techniques (SAFT) ... Source: Uppsala Universitet, Department of Material Science, Signals and Systems...

5

Synthetic Aperture Radar Persistent Scatterer Interferometry (PSInSAR) |  

Open Energy Info (EERE)

Synthetic Aperture Radar Persistent Scatterer Interferometry (PSInSAR) Synthetic Aperture Radar Persistent Scatterer Interferometry (PSInSAR) Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Synthetic Aperture Radar Persistent Scatterer Interferometry (PSInSAR) Author Parviz Tarikhi Published N/A, 2010 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Synthetic Aperture Radar Persistent Scatterer Interferometry (PSInSAR) Citation Parviz Tarikhi. Synthetic Aperture Radar Persistent Scatterer Interferometry (PSInSAR) [Internet]. 2010. Tunis, Tunisia. N/A. [cited 2013/09/17]. Available from: http://parviztarikhi.files.wordpress.com/2010/05/3psinsar-i-parviz_tarikhi.pdf Retrieved from "http://en.openei.org/w/index.php?title=Synthetic_Aperture_Radar_Persistent_Scatterer_Interferometry_(PSInSAR)&oldid=682949"

6

Synthetic aperture radar processing with tiered subapertures  

SciTech Connect (OSTI)

Synthetic Aperture Radar (SAR) is used to form images that are maps of radar reflectivity of some scene of interest, from range soundings taken over some spatial aperture. Additionally, the range soundings are typically synthesized from a sampled frequency aperture. Efficient processing of the collected data necessitates using efficient digital signal processing techniques such as vector multiplies and fast implementations of the Discrete Fourier Transform. Inherent in image formation algorithms that use these is a trade-off between the size of the scene that can be acceptably imaged, and the resolution with which the image can be made. These limits arise from migration errors and spatially variant phase errors, and different algorithms mitigate these to varying degrees. Two fairly successful algorithms for airborne SARs are Polar Format processing, and Overlapped Subaperture (OSA) processing. This report introduces and summarizes the analysis of generalized Tiered Subaperture (TSA) techniques that are a superset of both Polar Format processing and OSA processing. It is shown how tiers of subapertures in both azimuth and range can effectively mitigate both migration errors and spatially variant phase errors to allow virtually arbitrary scene sizes, even in a dynamic motion environment.

Doerry, A.W. [Sandia National Labs., Albuquerque, NM (United States). Synthetic Aperture Radar Dept.

1994-06-01T23:59:59.000Z

7

Inversion of synthetic aperture radar interferograms for sources of  

Open Energy Info (EERE)

Inversion of synthetic aperture radar interferograms for sources of Inversion of synthetic aperture radar interferograms for sources of production-related subsidence at the Dixie Valley geothermal field Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Inversion of synthetic aperture radar interferograms for sources of production-related subsidence at the Dixie Valley geothermal field Authors Bill Foxall and D. W. Vasco Published Journal Journal of Volcanology and Geothermal Research, 2008 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Inversion of synthetic aperture radar interferograms for sources of production-related subsidence at the Dixie Valley geothermal field Citation Bill Foxall,D. W. Vasco. 2008. Inversion of synthetic aperture radar interferograms for sources of production-related subsidence at the Dixie

8

Synthetic Aperture Radar Movie Gallery -- Sandia National Laboratories  

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

Synthetic Aperture Radar Movie Gallery Synthetic Aperture Radar Movie Gallery This gallery features movies of Sandia National Laboratories' synthetic aperture radar imagery of Albuquerque, New Mexico and Washington, DC. Sandia's Twin-Otter SAR produced these high-resolution stripmap images in real time. (Note: The movies below have been downsampled greatly to make them suitable for viewing on the world wide web. These movies are not recommended for modems of speeds less than 56 kbps due to their large file sizes.) Albuquerque, NM Area Movies Sandia National Laboratories' Twin-Otter SAR produced these Ku-Band 0.3 and 1.0 meter resolution images of Albuquerque, NM in real time. Synthetic aperture radar movie of west Gibson Blvd 0.3 meter airborne synthetic aperture radar movie from I-25 to Maxwell along Gibson Blvd. (Length: 30 seconds)

9

E-Print Network 3.0 - advanced synthetic aperture Sample Search...  

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

of Synthetic Aperture Summary: advanced synthetic aperture focusing tech- niques (SAFT) implemented in frequency domain have been widely... 1399 An Implementation of...

10

Motion Measurement for Synthetic Aperture Radar.  

SciTech Connect (OSTI)

Synthetic Aperture Radar (SAR) measures radar soundings from a set of locations typically along the flight path of a radar platform vehicle. Optimal focusing requires precise knowledge of the sounding source locations in 3 - D space with respect to the target scene. Even data driven focusing techniques (i.e. autofocus) requires some degree of initial fidelity in the measurements of the motion of the radar. These requirements may be quite stringent especially for fine resolution, long ranges, and low velocities. The principal instrument for measuring motion is typically an Inertial Measurement Unit (IMU), but these instruments have inherent limi ted precision and accuracy. The question is %22How good does an IMU need to be for a SAR across its performance space?%22 This report analytically relates IMU specifications to parametric requirements for SAR. - 4 - Acknowledgements Th e preparation of this report is the result of a n unfunded research and development activity . Although this report is an independent effort, it draws heavily from limited - release documentation generated under a CRADA with General Atomics - Aeronautical System, Inc. (GA - ASI), and under the Joint DoD/DOE Munitions Program Memorandum of Understanding. Sandia National Laboratories is a multi - program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of En ergy's National Nuclear Security Administration under contract DE - AC04 - 94AL85000.

Doerry, Armin W.

2015-01-01T23:59:59.000Z

11

Synthetic aperture design for increased SAR image rate  

DOE Patents [OSTI]

High resolution SAR images of a target scene at near video rates can be produced by using overlapped, but nevertheless, full-size synthetic apertures. The SAR images, which respectively correspond to the apertures, can be analyzed in sequence to permit detection of movement in the target scene.

Bielek, Timothy P. (Albuquerque, NM); Thompson, Douglas G. (Albuqerque, NM); Walker, Bruce C. (Albuquerque, NM)

2009-03-03T23:59:59.000Z

12

Synthetic aperture integration (SAI) algorithm for SAR imaging  

DOE Patents [OSTI]

A method and system for detecting the presence of subsurface objects within a medium is provided. In some embodiments, the imaging and detection system operates in a multistatic mode to collect radar return signals generated by an array of transceiver antenna pairs that is positioned across the surface and that travels down the surface. The imaging and detection system pre-processes the return signal to suppress certain undesirable effects. The imaging and detection system then generates synthetic aperture radar images from real aperture radar images generated from the pre-processed return signal. The imaging and detection system then post-processes the synthetic aperture radar images to improve detection of subsurface objects. The imaging and detection system identifies peaks in the energy levels of the post-processed image frame, which indicates the presence of a subsurface object.

Chambers, David H; Mast, Jeffrey E; Paglieroni, David W; Beer, N. Reginald

2013-07-09T23:59:59.000Z

13

A comparison of spotlight synthetic aperture radar image formation techniques  

SciTech Connect (OSTI)

Spotlight synthetic aperture radar images can be formed from the complex phase history data using two main techniques: (1) polar-to-cartesian interpolation followed by two-dimensional inverse Fourier transform (2DFFT), and (2) convolution backprojection (CBP). CBP has been widely used to reconstruct medical images in computer aided tomography, and only recently has been applied to form synthetic aperture radar imagery. It is alleged that CBP yields higher quality images because (1) all the Fourier data are used and (2) the polar formatted data is used directly to form a 2D Cartesian image and therefore 2D interpolation is not required. This report compares the quality of images formed by CBP and several modified versions of the 2DFFT method. We show from an image quality point of view that CBP is equivalent to first windowing the phase history data and then interpolating to an exscribed rectangle. From a mathematical perspective, we should expect this conclusion since the same Fourier data are used to form the SAR image. We next address the issue of parallel implementation of each algorithm. We dispute previous claims that CBP is more readily parallelizable than the 2DFFT method. Our conclusions are supported by comparing execution times between massively parallel implementations of both algorithms, showing that both experience similar decreases in computation time, but that CBP takes significantly longer to form an image.

Knittle, C.D.; Doren, N.E.; Jakowatz, C.V.

1996-10-01T23:59:59.000Z

14

Spatially Interpolated Nonlinear Anodization in Synthetic Aperture Radar Imagery  

SciTech Connect (OSTI)

Spatially Interpolated Nonlinear Anodization in Synthetic Aperture Original formulation of spatially variant anodization for complex synthetic aperture radar (SAR) imagery oversampled at twice the Nyquist rate (2.OX). Here we report a spatially interpolating, noninteger-oversampled SVA sidelobe. The pixel's apparent IPR location is assessed by comparing its value to the sum of its value plus weighted comparable for exact interpolation. However, exact interpolation implies an ideal sine interpolator3 and large components may not be necessary. Note that P is the summation of IPR diagonal values. The value of a sine IPR on the diagonals is a sine-squared; values much less than cardinal direction (m, n) values. This implies that cardinal direction interpolation requires higher precision than diagonal interpolation. Consequently, we employed a smaller set. The spatially interpolated SVA used an 8-point/4-point sine interpolator described above. Table 1 shows the Table 1 results show a two-times speed-up using the 1.3x oversampled and spatially interpolated SVA over the Figure 1d. Detected results of 1.3x oversampled sine interpolated spatially variant

Eichel, Paul H.; Jakowatz, Jr., Charles V.; Yocky, David A.

1999-06-29T23:59:59.000Z

15

Inverse-synthetic-aperture imaging of trees over a ground plane  

SciTech Connect (OSTI)

Recent data collections with the Sandia VHF-UHF synthetic-aperture radar have yielded surprising results; trees appear brighter in the images than expected! In an effort to understand this phenomenon, various small trees have been measured on the Sandia folded compact range with the inverse-synthetic-aperture imaging system. A compilation of these measurements is contained in this report.

Zittel, D.H.; Brock, B.C.; Littlejohn, J.H.; Patitz, W.E.

1995-11-01T23:59:59.000Z

16

Lynx: A High-Resolution Synthetic Aperture Radar  

SciTech Connect (OSTI)

Lynx is a high resolution, synthetic aperture radar (SAR) that has been designed and built by Sandia National Laboratories in collaboration with General Atomics (GA). Although Lynx may be operated on a wide variety of manned and unmanned platforms, it is primarily intended to be fielded on unmanned aerial vehicles. In particular, it may be operated on the Predator, I-GNAT, or Prowler II platforms manufactured by GA Aeronautical Systems, Inc. The Lynx production weight is less than 120 lb. and has a slant range of 30 km (in 4 mm/hr rain). It has operator selectable resolution and is capable of 0.1 m resolution in spotlight mode and 0.3 m resolution in stripmap mode. In ground moving target indicator mode, the minimum detectable velocity is 6 knots with a minimum target cross-section of 10 dBsm. In coherent change detection mode, Lynx makes registered, complex image comparisons either of 0.1 m resolution (minimum) spotlight images or of 0.3 m resolution (minimum) strip images. The Lynx user interface features a view manager that allows it to pan and zoom like a video camera. Lynx was developed under corporate finding from GA and will be manufactured by GA for both military and commercial applications. The Lynx system architecture will be presented and some of its unique features will be described. Imagery at the finest resolutions in both spotlight and strip modes have been obtained and will also be presented.

Doerry, A.W.; Hensley, W.H.; Pace, F.; Stence, J.; Tsunoda, S.I.; Walker, B.C.; Woodring, M.

1999-03-08T23:59:59.000Z

17

The emerging technology of synthetic aperture focusing for ultrasonic testing  

SciTech Connect (OSTI)

The capabilities of synthetic aperture focusing techniques for ultrasonic testing (SAFT-UT) as a nondestructure testing technique are presented. SAFT-UT is a digital ultrasonic imaging method, which can be adapted to many different materials, specimen geometries, and wave propagation modes. The process allows each point within the inspected volume to be focused upon by mathematically simulating the action of a lens, specifically formed for imaging that point in the volume. All points are therefore imaged at the maximum available resolution. The PNL effort in SAFT-UT is a continuation of a program started earlier by the NRC at the University of Michigan. The objectives of the present program are: (1) to engineer and evaluate a real-time flaw detection and imaging system based on SAFT-UT for inservice inspection of all required LWR components, (2) to establish calibration and field test procedures, (3) to demonstrate and validate the system through field reactor inspections, and (4) to gain ASME Code acceptance of the real-time SAFT-UT technique. The following aspects of SAFT-UT are presented in this paper: (1) brief overview of SAFT imaging theory, (2) results demonstrating achievable lateral resolution, and (3) presentation of shear wave SAFT-UT images.

Busse, L.J.; Collins, H.D.; Doctor, S.R.

1984-06-01T23:59:59.000Z

18

GIS for combined storage and analysis of data from terrestrial and synthetic aperture radar remote sensing deformation measurements in hard coal mining  

Science Journals Connector (OSTI)

In this paper we demonstrate the capabilities of our ArcGIS-based software development that includes an adapted database system and a GIS tool for storage, combined analysis and visualization of leveling data and interferometric synthetic aperture radar (SAR) deformation measurements. Preprocessed remote sensing image data are stored with metadata that include all processing routines and parameters. This allows reproduction and traceability of all processing steps. Deformation monitoring is supported through data searching and selection based on a variety of criteria. A methods toolbox allows spatio-temporal analyses for points, lines and areas (e.g. subsidence basins) in a graphical manner.

W. Hannemann; T. Brock; W. Busch

2011-01-01T23:59:59.000Z

19

1008 ieee transactions on ultrasonics, ferroelectrics, and frequency control, vol. 53, no. 5, may 2006 An Iterative Synthetic Aperture Imaging  

E-Print Network [OSTI]

as synthetic aperture focusing technique (SAFT) [1] has been inspired by synthetic aperture sonar (SAS) [2] and synthetic aper- ture radar (SAR) [3]. SAFT has been applied both in med- ical and nondestructive material that this technique is superior to many other common SAI algo- rithms, such as conventional SAFT and phased-array tech

20

Instrument Design Simulations for Synthetic Aperture Microwave Radiometric Imaging of Wind Speed and  

E-Print Network [OSTI]

Instrument Design Simulations for Synthetic Aperture Microwave Radiometric Imaging of Wind Speed, US Abstract -- The measurement of peak winds in hurricanes is critical to forecasting intensity in radiative transfer modeling for hurricane force winds and large incidence angles are required for HIRad

Ruf, Christopher

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

Basics of Polar-Format algorithm for processing Synthetic Aperture Radar images.  

SciTech Connect (OSTI)

The purpose of this report is to provide a background to Synthetic Aperture Radar (SAR) image formation using the Polar Format (PFA) processing algorithm. This is meant to be an aid to those tasked to implement real-time image formation using the Polar Format processing algorithm.

Doerry, Armin Walter

2012-05-01T23:59:59.000Z

22

Rock glacier surface motion in Beacon Valley, Antarctica, from synthetic-aperture radar interferometry  

E-Print Network [OSTI]

al., 1998]. [5] Although subsurface ice in Beacon Valley has long been known [Linkletter et al., 1973Rock glacier surface motion in Beacon Valley, Antarctica, from synthetic-aperture radar of rock glaciers in the Beacon Valley sector of the McMurdo Dry Valleys, in East Antarctica, as part

Fountain, Andrew G.

23

High precision ultrasonic scanning system and SAFT-UT (synthetic aperture technique) development  

SciTech Connect (OSTI)

The NDT divisions at SNLA are continually striving to anticipate customer requests by adding advanced test facilities. This paper describes a new ultrasonic testing system being developed in Albuquerque to provide precise scanning of smaller test objects. There are two major subsystems that make-up the ultrasonic testing system, a high precision scanner/digitizer and a real-time processing system which automates the synthetic aperture focusing technique. These subsystems are described in the following sections.

Shurtleff, W.W.

1987-06-01T23:59:59.000Z

24

Assessment of radial image distortion and spherical aberration on three-dimensional synthetic aperture particle image velocimetry measurements  

E-Print Network [OSTI]

This thesis presents a numerical study of the effects of radial image distortion and spherical aberration on reconstruction quality of synthetic aperture particle image velocimetry (SAPIV) measurements. A simulated SAPIV ...

Kubaczyk, Daniel Mark

2013-01-01T23:59:59.000Z

25

Manual and Semiautomated Wind Direction Editing for Use in the Generation of Synthetic Aperture Radar Wind Speed Imagery  

Science Journals Connector (OSTI)

Previous studies have demonstrated that satellite synthetic aperture radar (SAR) can be used as an accurate scatterometer, yielding wind speed fields with subkilometer resolution. This wind speed generation is only possible, however, if a ...

George S. Young; Todd D. Sikora; Nathaniel S. Winstead

2007-06-01T23:59:59.000Z

26

Interferometric Synthetic Aperture Radar (InSAR) for Fine-resolution Basal Ice Sheet Imaging  

E-Print Network [OSTI]

-pass mode geometry R 1 R 2 Target RTOT1 = R1 + R1 RTOT2 = R2 + R2 TX1/RX1 TX2/RX2 a = 2(R1 - R2)/(R1 - R2) = 2 RTOT1 - RTOT2= 2(R1 - R2) Figure 2.2: Single-pass InSAR geometry R 1 R 2 Target RTOT1 = R1 + R1 RTOT2 = R1 + R2 TX1/RX1 RX2 a = (R1 - R2)/(R1... receiver. Page 22 of 104 Figure 2.4: Ping-pong mode geometry R 1 R 2 Target RTOT1 = R1 + R1 RTOT2 = R2 + R2 TX1/RX1 TX2/RX2 a = 2(R1 - R2)/(R1 - R2) = 2 RTOT1 - RTOT2= 2(R1 - R2) 2.3 InSAR ?R Relationship Next looking only at the geometry involving B...

Blake, William Arthur

2010-08-31T23:59:59.000Z

27

Multi-baseline interferometric synthetic aperture radar applications and error analysis  

E-Print Network [OSTI]

In this thesis, we deal primarily with the multi-baseline SAR configuration utilizing three satellites. Two applications of InSAR, multi-baseline height retrieval and multi-baseline compensation of CCD's slope biasing ...

Chua, Song Liang

2007-01-01T23:59:59.000Z

28

Transient volcano deformation sources imaged with interferometric synthetic aperture radar: Application to Seguam Island, Alaska  

E-Print Network [OSTI]

of the InSAR data, reveals a relatively simple system of interrelated predictable processes driven by magma data accounts for the transient, interrelated behavior of the source clusters and the observed to infer subsurface processes that cannot be directly observed. Mechanical modeling, con- strained

29

ieee transactions on ultrasonics, ferroelectrics, and frequency control, vol. 54, no. 7, july 2007 1399 An Implementation of Synthetic Aperture  

E-Print Network [OSTI]

, Senior Member, IEEE Abstract--A new implementation of a synthetic aper- ture focusing technique (SAFT-domain SAFT are com- pared in the paper using simulated and real ultrasonic data. I. Introduction Although advanced synthetic aperture focusing tech- niques (SAFT) implemented in frequency domain have been widely

30

A novel synthetic aperture technique for breast tomography with toroidal arrays  

SciTech Connect (OSTI)

Ultrasound is commonly used as an adjunct to mammography for diagnostic evaluation of suspicions arising from breast cancer screening. As an alternative to conventional sonography that uses hand-held transducers, toroidal array probes that encircle the breast immersed in a water bath have been investigated for ultrasound tomography. This paper introduces a new method for three-dimensional synthetic aperture diffraction tomography that maximizes the resolution in the scanning direction and provides quantitative reconstructions of the acoustic properties of the object. The method is validated by means of numerical simulations.

Huang, Lianjie [Los Alamos National Laboratory; Simonetti, Francesco [IMPERIAL COLLEGE

2009-01-01T23:59:59.000Z

31

Review and discussion of the development of synthetic aperture focusing technique for ultrasonic testing (SAFT-UT)  

SciTech Connect (OSTI)

The development and capabilities of synthetic aperture focusing techniques for ultrasonic testing (SAFT-UT) are presented. The purpose of SAFT-UT is to produce high-resolution images of the interior of opaque objects. The goal of this work is to develop and implement methods which can be used to detect and to quantify the extent of defects and cracks in critical components of nuclear reactors (pressure vessels, primary piping systems, and nozzles). This report places particular emphasis upon the practical experimental results that have been obtained using SAFT-UT as well as the theoretical background that underlies synthetic aperture focusing. A discussion regarding high-speed and real-time implementations of two- and three-dimensional synthetic aperture focusing is also presented.

Busse, L.J.; Collins, H.D.; Doctor, S.R.

1984-03-01T23:59:59.000Z

32

A model for forming airborne synthetic aperture radar images of underground targets  

SciTech Connect (OSTI)

Synthetic Aperture Radar (SAR) from an airborne platform has been proposed for imaging targets beneath the earth`s surface. The propagation of the radar`s energy within the ground, however, is much different than in the earth`s atmosphere. The result is signal refraction, echo delay, propagation losses, dispersion, and volumetric scattering. These all combine to make SAR image formation from an airborne platform much more challenging than a surface imaging counterpart. This report treats the ground as a lossy dispersive half-space, and presents a model for the radar echo based on measurable parameters. The model is then used to explore various imaging schemes, and image properties. Dynamic range is discussed, as is the impact of loss on dynamic range. Modified window functions are proposed to mitigate effects of sidelobes of shallow targets overwhelming deeper targets.

Doerry, A.W.

1994-01-01T23:59:59.000Z

33

On the convergence of the phase gradient autofocus algorithm for synthetic aperture radar imaging  

SciTech Connect (OSTI)

Synthetic Aperture Radar (SAR) imaging is a class of coherent range and Doppler signal processing techniques applied to remote sensing. The aperture is synthesized by recording and processing coherent signals at known positions along the flight path. Demands for greater image resolution put an extreme burden on requirements for inertial measurement units that are used to maintain accurate pulse-to-pulse position information. The recently developed Phase Gradient Autofocus algorithm relieves this burden by taking a data-driven digital signal processing approach to estimating the range-invariant phase aberrations due to either uncompensated motions of the SAR platform or to atmospheric turbulence. Although the performance of this four-step algorithm has been demonstrated, its convergence has not been modeled mathematically. A new sensitivity study of algorithm performance is a necessary step towards this model. Insights that are significant to the application of this algorithm to both SAR and to other coherent imaging applications are developed. New details on algorithm implementation identify an easily avoided biased phase estimate. A new algorithm for defining support of the point spread function is proposed, which promises to reduce the number of iterations required even for rural scenes with low signal-to-clutter ratios.

Hicks, M.J.

1996-01-01T23:59:59.000Z

34

REDUCTION OF VIBRATION-INDUCED ARTIFACTS IN SYNTHETIC-APERTURE-RADAR IMAGERY USING THE FRACTIONAL FOURIER TRANSFORM  

E-Print Network [OSTI]

REDUCTION OF VIBRATION-INDUCED ARTIFACTS IN SYNTHETIC-APERTURE-RADAR IMAGERY USING THE FRACTIONAL of objects exhibit- ing low-level vibrations are accompanied by localized arti- facts, or ghost targets to the non-stationary nature of the returned signals from vibrating objects. Re- cently, a method based

Santhanam, Balu

35

Imaging targets embedded in a lossy half space with Synthetic Aperture Radar  

SciTech Connect (OSTI)

This paper addresses theoretical aspects of forming images from an airborne Synthetic Aperture Radar (SAR) of targets buried below the earth`s surface. Soil is generally a lossy, dispersive medium, with wide ranging variability in these attributes depending on soil type, moisture content, and a host of other physical properties. Focussing a SAR subsurface image presents new dimensions of complexity relative to its surface-image counterpart, even when the soil`s properties are known. This paper treats the soil as a lossy, dispersive half space, and presents a practical model for the radar echo-delay time to point scatterers within it. This model is then used to illustrate effects of refraction, dispersion, and attenuation on a SAR`s phase histories, and the resulting image. Various data collection geometries and processing strategies are examined for both 2-Dimensional and 3-Dimensional SAR images. The conclusions from this work are that (1) focussing a SAR image must generally take into account both refraction and dispersion, (2) resolving targets at different depths in lossy soils requires perhaps unprecedented sidelobe attenuation, that for some soils may only be achievable with specialized window functions, (3) the impulse response of the soil itself places a practical limit on the usable bandwidth of the radar, and (4) dynamic ranges and sensitivities will need to be orders of magnitude greater than typical surface-imaging SARs, leading to significant impact on SAR parameters, for example compressing the usable range of pulse repetition frequencies (PRFs).

Doerry, A.W.; Brock, B.C.; Boverie, B.; Cress, D.

1994-05-01T23:59:59.000Z

36

A High Resolution, Light-Weight, Synthetic Aperture Radar for UAV Application  

SciTech Connect (OSTI)

(U) Sandia National Laboratories in collaboration with General Atomics (GA) has designed and built a high resolution, light-weight, Ku-band Synthetic Aperture Radar (SAR) known as "Lynx". Although Lynx can be operated on a wide variety of manned and unmanned platforms, its design is optimized for use on medium altitude Unmanned Aerial Vehicles (UAVS). In particular, it can be operated on the Predator, I-GNAT, and Prowler II platforms manufactured by GA. (U) The radar production weight is less than 120 lb and operates within a 3 GHz band from 15.2 GHz to 18.2 GHz with a peak output power of 320 W. Operating range is resolution and mode dependent but can exceed 45 km in adverse weather (4 mm/hr rain). Lynx has operator selectable resolution and is capable of 0.1 m resolution in spotlight mode and 0.3 m resolution in stripmap mode, over substantial depression angles (5 to 60 deg) and squint angles (broadside 45 deg). Real-time Motion Compensation is implemented to allow high-quality image formation even during vehicle turns and other maneuvers.

Doerry, A.W.; Hensley, W.H.; Stence, J.; Tsunoda, S.I. Pace, F.; Walker, B,C.; Woodring, M.

1999-05-27T23:59:59.000Z

37

SNM neutron detection using a time-gated synthetic aperture hybrid approach  

SciTech Connect (OSTI)

This work focuses on using forward and adjoint transport in a hybrid application of 3-D deterministic (PENTRAN) and Monte Carlo (MCNP5) codes to model a series of neutron detector blocks. These blocks, or 'channels, ' contain a unique set of moderators with 4 atm He-3 detectors tuned to detect and profile a gross energy spectrum of a passing neutron (SNM) source. Ganging the units together as a large area system enables one to apply time gating the source-detector response to maximize signal to noise responses from a passing source with minimal background; multiple units may be positioned as a collective synthetic aperture detector array to be used as a way of performing real time neutron spectroscopy for detecting special nuclear materials in moving vehicles. The initial design, detector response coupling, confirmation of initial design functionality using adjoint transport calculations, and realistic simulation using PENTRAN and MCNP5 are presented. Future work will include optimization and application to realistic scenarios and additional sources. (authors)

Molinar, M.; Yi, C.; Edgar, C. A.; Manalo, K.; Chin, M.; Sjoden, G. [Nuclear and Radiological Engineering Program, George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, 770 State Street, Atlanta GA 30332-0745 (United States)

2013-07-01T23:59:59.000Z

38

3D synthetic aperture PIV measurements from artificial vibrating vocal folds  

E-Print Network [OSTI]

During speech, air from the lungs is forced past the vocal folds which vibrate, producing sound. A pulsatile jet of air is formed downstream of the vibrating folds which interacts with the various structures in the airway. Currently, it is postulated that the way this jet interacts with the downstream structures in the airway directly affects the quality of human speech. In order to better understand this jet, it is desirable to visualize the jet in three dimensions. We present the results of a method that reconstructs the three dimensional velocity field using Synthetic aperture PIV (SAPIV) \\cite{Belden:2010}. SAPIV uses an array of high-speed cameras to artificially create a single camera with a variable focal length. This is accomplished by overlapping the images from the array to create a "focal stack". As the images are increasingly overlapped, more distant image planes come into focus. 3D PIV is then performed on the "refocused" focal stack to reconstruct the flow field in three dimensions. SAPIV has th...

Daily, Jesse; Belden, Jesse; Thomson, Scott; Truscott, Tadd

2011-01-01T23:59:59.000Z

39

The effects of surface mapping corrections with synthetic-aperture focusing techniques on ultrasonic imaging  

SciTech Connect (OSTI)

Image processing to improve the resolution of ultrasonic imaging systems requires an accurate knowledge of the geometry and properties of the media through which the ultrasound travels. This is particularly true when a method such as the synthetic-aperture focusing technique (SAFT) is used. For SAFT to function properly, it is necessary to know accurately the path traveled by the ultrasound from transducer to target and back again. A form of SAFT imaging is described in which the imaging routine also constructs a map of the target surface. This map is then used to calculate accurately the propagation history of the ultrasound for the SAFT processing. The resolution and positional accuracy of unprocessed images, unmapped SAFT images, and surface mapped SAFT images are compared. All but the surface mapping images show significant errors in positional accuracy for relatively small surface deviations. The surface mapping correction, however, brings the imaging accuracy back to within the limits of the mechanical experimental error. A more severely distorted surface destroys the phase relationships required for processing unless the surface variations are accounted for. In addition, results achieved with a flat ultrasonic transducer suggest significant simplifications that may ease field implementation of SAFT systems.

Johnson, J.A.; Barna, B.A.

1983-09-01T23:59:59.000Z

40

Effects of surface mapping corrections with synthetic-aperture focusing techniques on ultrasonic imaging  

SciTech Connect (OSTI)

Image processing to improve the resolution of ultrasonic imaging systems requires an accurate knowledge of the geometry and properties of the media through which the ultrasound travels. This is particularly true when a method such as the Synthetic Aperture Focusing Technique (SAFT) is used. For SAFT to function properly, it is necessary to accurately know the path traveled by the ultrasound from transducer to target and back again. A form of SAFT imaging is described in which the image routine also constructs a map of the target surface. This map is then used to accurately calculate the propagation history of the ultrasound for the SAFT processing. The resolution and positional accuracy of unprocessed images, unmapped SAFT images, and surface mapping SAFT images are compared. All but the surface mapping images show significant errors in positional accuracy for relatively small surface deviations. The surface mapping correction however, brings the imaging accuracy back to within the limits of the mechanical experimental error. In addition, results achieved with a flat ultrasonic transducer suggest significant simplifications that may ease field implementation of SAFT systems.

Barna, B.A.; Johnson, J.A.

1981-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

Final Report: Detection and Characterization of Underground Facilities by Stochastic Inversion and Modeling of Data from the New Generation of Synthetic Aperture Satellites  

SciTech Connect (OSTI)

Many clandestine development and production activities can be conducted underground to evade surveillance. The purpose of the study reported here was to develop a technique to detect underground facilities by broad-area search and then to characterize the facilities by inversion of the collected data. This would enable constraints to be placed on the types of activities that would be feasible at each underground site, providing a basis the design of targeted surveillance and analysis for more complete characterization. Excavation of underground cavities causes deformation in the host material and overburden that produces displacements at the ground surface. Such displacements are often measurable by a variety of surveying or geodetic techniques. One measurement technique, Interferometric Synthetic Aperture Radar (InSAR), uses data from satellite-borne (or airborne) synthetic aperture radars (SARs) and so is ideal for detecting and measuring surface displacements in denied access regions. Depending on the radar frequency and the acquisition mode and the surface conditions, displacement maps derived from SAR interferograms can provide millimeter- to centimeter-level measurement accuracy on regional and local scales at spatial resolution of {approx}1-10 m. Relatively low-resolution ({approx}20 m, say) maps covering large regions can be used for broad-area detection, while finer resolutions ({approx}1 m) can be used to image details of displacement fields over targeted small areas. Surface displacements are generally expected to be largest during or a relatively short time after active excavation, but, depending on the material properties, measurable displacement may continue at a decreasing rate for a considerable time after completion. For a given excavated volume in a given geological setting, the amplitude of the surface displacements decreases as the depth of excavation increases, while the area of the discernable displacement pattern increases. Therefore, the ability to detect evidence for an underground facility using InSAR depends on the displacement sensitivity and spatial resolution of the interferogram, as well as on the size and depth of the facility and the time since its completion. The methodology development described in this report focuses on the exploitation of synthetic aperture radar data that are available commercially from a number of satellite missions. Development of the method involves three components: (1) Evaluation of the capability of InSAR to detect and characterize underground facilities ; (2) inversion of InSAR data to infer the location, depth, shape and volume of a subsurface facility; and (3) evaluation and selection of suitable geomechanical forward models to use in the inversion. We adapted LLNL's general-purpose Bayesian Markov Chain-Monte Carlo procedure, the 'Stochastic Engine' (SE), to carry out inversions to characterize subsurface void geometries. The SE performs forward simulations for a large number of trial source models to identify the set of models that are consistent with the observations and prior constraints. The inverse solution produced by this kind of stochastic method is a posterior probability density function (pdf) over alternative models, which forms an appropriate input to risk-based decision analyses to evaluate subsequent response strategies. One major advantage of a stochastic inversion approach is its ability to deal with complex, non-linear forward models employing empirical, analytical or numerical methods. However, while a geomechanical model must incorporate adequate physics to enable sufficiently accurate prediction of surface displacements, it must also be computationally fast enough to render the large number of forward realizations needed in stochastic inversion feasible. This latter requirement prompted us first to investigate computationally efficient empirical relations and closed-form analytical solutions. However, our evaluation revealed severe limitations in the ability of existing empirical and analytical forms to predict deformations from undergro

Foxall, W; Cunningham, C; Mellors, R; Templeton, D; Dyer, K; White, J

2012-02-27T23:59:59.000Z

42

Monitoring deformation at the Geysers Geothermal Field, California, using C-band and X-band interferometric synthetic aperture radar  

E-Print Network [OSTI]

multiphase fluid flow, heat transfer, and deformation inthe coupled multiphase fluid flow, heat transfer, and defor-

Vasco, D.W.

2014-01-01T23:59:59.000Z

43

Volumetric analysis of fish swimming hydrodynamics using synthetic aperture particle image velocimetry  

E-Print Network [OSTI]

Abstract This thesis details the implementation of a three-dimensional PIV system to study the hydrodynamics of freely swimming Giant Danio (Danio aequipinnatus). Volumetric particle fields are reconstructed using synthetic ...

Mendelson, Leah Rose

2013-01-01T23:59:59.000Z

44

The SAFT-UT (synthetic aperture focusing technique for ultrasonic testing) real-time inspection system: Operational principles and implementation  

SciTech Connect (OSTI)

This document provides a technical description of the real-time imaging system developed for rapid flaw detection and characterization utilizing the synthetic aperture focusing technique for ultrasonic testing (SAFT-UT). The complete fieldable system has been designed to perform inservice inspection of light-water reactor components. Software was written on a DEC LSI 11/23 computer system to control data collection. The unprocessed data is transferred to a VAX 11/730 host computer to perform data processing and image display tasks. A parallel architecture peripheral to the host computer, referred to as the Real-Time SAFT Processor, rapidly performs the SAFT processing function. From the host's point of view, this device operates on the SAFT data in such a way that one may consider it to be a specialized or SAFT array processor. A guide to SAFT-UT theory and conventions is included, along with a detailed description of the operation of the software, how to install the software, and a detailed hardware description.

Hall, T.E.; Reid, L.D.; Doctor, S.R.

1988-06-01T23:59:59.000Z

45

Program for field validation of the Synthetic Aperture Focusing Technique for Ultrasonic Testing (SAFT UT). Final report  

SciTech Connect (OSTI)

This final report describes work performed by Southwest Research Institute for the Nuclear Regulatory Commission (NRC) in fulfillment of NRC Contract No. NRC-04-77-145: ''Program for Field Validation of the Synthetic Aperture Focusing Technique for Ultrasonic Testing (SAFT UT).'' The purpose of the project was to validate the effectiveness of SAFT UT as a nondestructive examination technique for nuclear power and other related industries. SAFT UT is an ultrasonic imaging method for accurate measurement of the spatial location and extent of acoustically reflective surfaces (flaws) contained in objects such as structural components and weldments in nuclear power reactor systems. The increased measurement accuracy offered by SAFT, when compared with that provided by measurement methods now in use, will improve the reliability of flaw severity assessment with resultant safety and economic benefits to the nuclear power industry. This report presents a comprehensive discussion of the work accomplished in evaluating the performance capabilities of the developed SAFT UT inspection system. Inspection results obtained using both 0-degree longitudinal and angle-beam operating modes are presented. These results include laboratory and nuclear power plant field site examinations on a variety of defect types contained within carbon and stainless steel flat plate and cylindrical test specimens or components. The SAFT UT processed data flaw images are evaluated by comparing them to results obtained from destructive sectioning or by using flaw fabrication data which predicted actual flaw depth, orientation and size. On the basis of these evaluations, conclusions are presented which summarize the performance capabilities of the SAFT UT inspection technique. 116 figs.

Hamlin, D.R.

1985-11-01T23:59:59.000Z

46

E-Print Network 3.0 - aperture radar processing Sample Search...  

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

sensors (Ex. TM, IKONOS, ERS) 3. Synthetic Aperture Radar... ;SPOT Image 12;Haiti Earthquake 12; Synthetic Aperture Radar (SAR) is a method for developing high... , textural...

47

E-Print Network 3.0 - aperture sequential beamforming Sample...  

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

solid objects Tadeusz Stepinski Summary: methods based on synthetic aperture concept (SAFT) is given and illustrated with experimental results... imaging, synthetic aperture,...

48

Development and validation of a real-time SAFT-UT (synthetic aperture focusing technique for ultrasonic testing) system for the inspection of light water reactor components: Annual report, October 1985-September 1986  

SciTech Connect (OSTI)

The Pacific Northwest Laboratory is working to design, fabricate, and evaluate a real-time flaw detection and characterization system based on the synthetic aperture focusing technique for ultrasonic testing (SAFT-UT). The system is designed to perform inservice inspection of light-water reactor components. Included objectives of this program for the Nuclear Regulatory Commission are to develop procedures for system calibration and field operation, to validate the system through laboratory and field inspections, and to generate an engineering data base to support ASME Code acceptance of the technology. This progress report covers the programmatic work from October 1985 through September 1986. 45 figs., 8 tabs.

Doctor, S.R.; Hall, T.E.; Reid, L.D.; Mart, G.A.

1987-07-01T23:59:59.000Z

49

E-Print Network 3.0 - aperture radar insar Sample Search Results  

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

Engineering ; Mathematics 3 Monitoring and characterizing natural hazards with satellite InSAR imagery *, Jixian Zhangb Summary: February 2010) Interferometric synthetic...

50

E-Print Network 3.0 - aperture radar sar Sample Search Results  

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

(COMET) Collection: Geosciences 5 Monitoring and characterizing natural hazards with satellite InSAR imagery *, Jixian Zhangb Summary: February 2010) Interferometric synthetic...

51

An Analysis of Past and Future Changes in the Ice Cover of Two High-Arctic Lakes Based on Synthetic Aperture Radar (SAR) and Landsat Imagery  

E-Print Network [OSTI]

and heat energy between a lake and its surroundings (Adams, 1981). In high-arctic lakes, changes in ice climate data are limited, remote sensing of lake-ice conditions can provide valuable insight into climaticAn Analysis of Past and Future Changes in the Ice Cover of Two High-Arctic Lakes Based on Synthetic

Bradley, Raymond S.

52

Coherence versus interferometric resolution  

Science Journals Connector (OSTI)

We examine the relation between second-order coherence and resolution in the interferometric detection of phase shifts. While for classical thermal light resolution and second-order coherence are synonymous, we show that for quantum light beams reaching optimum precision second-order coherence and resolution become antithetical.

Alfredo Luis

2010-06-30T23:59:59.000Z

53

Coherence versus interferometric resolution  

SciTech Connect (OSTI)

We examine the relation between second-order coherence and resolution in the interferometric detection of phase shifts. While for classical thermal light resolution and second-order coherence are synonymous, we show that for quantum light beams reaching optimum precision second-order coherence and resolution become antithetical.

Luis, Alfredo [Departamento de Optica, Facultad de Ciencias Fisicas, Universidad Complutense, 28040 Madrid (Spain)

2010-06-15T23:59:59.000Z

54

Use of Synthetic Aperture Radar (SAR) to Identify and Characterize Overwintering Areas of Fish in Ice-Covered Arctic RIvers: A Demonstration with Broad Whitefish and their Habitats in the Sagavanirktok River, Alaska  

SciTech Connect (OSTI)

In northern climates, locating overwintering fish can be very challenging due to thick ice cover. Areas near the coast of the Beaufort Sea provide valuable overwintering habitat for both resident and anadromous fish species; identifying and understanding their use of overwintering areas is of special interest. Synthetic aperture radar (SAR) imagery from two spaceborne satellites was examined as an alternative to radiotelemetry for identifying anadromous fish overwintering. The presence of water and ice were sampled at 162 sites and fish were sampled at 16 of these sites. From SAR imagery alone, we successfully identified large pools inhabited by overwintering fish in the ice-covered Sagavanirktok River. In addition, the imagery was able to identify all of the larger pools (mean minimum length of 138m (range 15-470 m; SD=131)) of water located by field sampling. The effectiveness of SAR to identify these pools varied from 31% to 100%, depending on imagery polarization, the incidence angle range, and the orbit. Horizontal transmitvertical receive (HV) polarization appeared best. The accuracy of SAR was also assessed at a finer pixel-by-pixel (30-m x30-m) scale. The best correspondence at this finer scale was obtained with an image having HV polarization. The levels of agreement ranged from 54% to 69%. The presence of broad whitefish (the only anadromous species present) was associated with salinity and pool size (estimated with SAR imagery); fish were more likely to be found in larger pools with low salinity. This research illustrates that SAR imaging has great potential for identifying under-ice overwintering areas of riverine fish. These techniques should allow managers to identify critical overwintering areas with relatively more ease and lower cost than traditional techniques.

Brown, Richard S.; Duguay, Claude R.; Mueller, Robert P.; Moulton, Larry; Doucette, Peter J.; Tagestad, Jerry D.

2010-12-01T23:59:59.000Z

55

E-Print Network 3.0 - aperture radar image Sample Search Results  

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

flight trajecto- In synthetic aperture radar (SAR) imaging a scene... -y(s). The projection data and reconstructed ... Source: Yazici, Birsen - Department of Electrical,...

56

Extreme ultraviolet interferometric measurements of diffraction-limited optics  

Science Journals Connector (OSTI)

At-wavelength interferometric measurements of recently fabricatedextreme ultraviolet(EUV) microstepper projection optics have revealed the highest performance for prototype EUV lithographic systems observed to date. The phase-shifting point diffractioninterferometer is used to measure and align these two-mirror multilayer-coated Schwarzschild optical systems designed with a numerical aperture of 0.088 and operating at 13.4 nm wavelength. Root-mean-square wave front error magnitudes as small as 0.60 nm have been achieved actually exceeding the design tolerance set for these objectives.

Kenneth A. Goldberg; Patrick Naulleau; Jeffrey Bokor

1999-01-01T23:59:59.000Z

57

Extreme ultraviolet interferometric measurements of diffraction-limited optics  

SciTech Connect (OSTI)

At-wavelength interferometric measurements of recently fabricated extreme ultraviolet (EUV) microstepper projection optics have revealed the highest performance for prototype EUV lithographic systems observed to date. The phase-shifting point diffraction interferometer is used to measure and align these two-mirror, multilayer-coated Schwarzschild optical systems designed with a numerical aperture of 0.088 and operating at 13.4 nm wavelength. Root-mean-square wave front error magnitudes as small as 0.60 nm have been achieved, actually exceeding the design tolerance set for these objectives. (c) 1999 American Vacuum Society.

Goldberg, Kenneth A. [Center for X-Ray Optics, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)] [Center for X-Ray Optics, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); Naulleau, Patrick [Center for X-Ray Optics, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)] [Center for X-Ray Optics, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); Bokor, Jeffrey [Center for X-Ray Optics, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States) [Center for X-Ray Optics, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); EECS Department, University of California, Berkeley, California 94720 (United States)

1999-11-01T23:59:59.000Z

58

Quantum Interferometric Sensors  

E-Print Network [OSTI]

Quantum entanglement has the potential to revolutionize the entire field of interferometric sensing by providing many orders of magnitude improvement in interferometer sensitivity. The quantum-entangled particle interferometer approach is very general and applies to many types of interferometers. In particular, without nonlocal entanglement, a generic classical interferometer has a statistical-sampling shot-noise limited sensitivity that scales like $1/\\sqrt{N}$, where $N$ is the number of particles passing through the interferometer per unit time. However, if carefully prepared quantum correlations are engineered between the particles, then the interferometer sensitivity improves by a factor of $\\sqrt{N}$ to scale like 1/N, which is the limit imposed by the Heisenberg Uncertainty Principle. For optical interferometers operating at milliwatts of optical power, this quantum sensitivity boost corresponds to an eight-order-of-magnitude improvement of signal to noise. This effect can translate into a tremendous science pay-off for space missions. For example, one application of this new effect is to fiber optical gyroscopes for deep-space inertial guidance and tests of General Relativity (Gravity Probe B). Another application is to ground and orbiting optical interferometers for gravity wave detection, Laser Interferometer Gravity Observatory (LIGO) and the European Laser Interferometer Space Antenna (LISA), respectively. Other applications are to Satellite-to-Satellite laser Interferometry (SSI) proposed for the next generation Gravity Recovery And Climate Experiment (GRACE II).

Kishore T. Kapale; Leo D. Didomenico; Hwang Lee; Pieter Kok; Jonathan P. Dowling

2005-07-15T23:59:59.000Z

59

Rotating Aperture System  

DOE Patents [OSTI]

A rotating aperture system includes a low-pressure vacuum pumping stage with apertures for passage of a deuterium beam. A stator assembly includes holes for passage of the beam. The rotor assembly includes a shaft connected to a deuterium gas cell or a crossflow venturi that has a single aperture on each side that together align with holes every rotation. The rotating apertures are synchronized with the firing of the deuterium beam such that the beam fires through a clear aperture and passes into the Xe gas beam stop. Portions of the rotor are lapped into the stator to improve the sealing surfaces, to prevent rapid escape of the deuterium gas from the gas cell.

Rusnak, Brian (Livermore, CA); Hall, James M. (Livermore, CA); Shen, Stewart (Danville, CA); Wood, Richard L. (Santa Fe, NM)

2005-01-18T23:59:59.000Z

60

LARGE-APERTURE D- ACCELERATORS  

E-Print Network [OSTI]

Vignetted current profile at accelerator entrance aperture 'LARGE-APERTURE D" ACCELERATORS* 0. A. Anderson" " Lawrencen i a 9-1720 Abstract Accelerator designs are described for

Anderson, O.A.

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

Interferometric tunability of the absorption  

E-Print Network [OSTI]

We propose an interferometric setup that permits to tune the quantity of radiation absorbed by an object illuminated by a fixed light source. The method can be used to selectively irradiate portions of an object based on their transmissivities or to accurately estimate the transmissivities from rough absorption measurements.

Vittorio Giovannetti; Seth Lloyd; Lorenzo Maccone

2006-02-14T23:59:59.000Z

62

Aperture center energy showcase  

SciTech Connect (OSTI)

Sandia and Forest City have established a Cooperative Research and Development Agreement (CRADA), and the partnership provides a unique opportunity to take technology research and development from demonstration to application in a sustainable community. A project under that CRADA, Aperture Center Energy Showcase, offers a means to develop exhibits and demonstrations that present feedback to community members, Sandia customers, and visitors. The technologies included in the showcase focus on renewable energy and its efficiency, and resilience. These technologies are generally scalable, and provide secure, efficient solutions to energy production, delivery, and usage. In addition to establishing an Energy Showcase, support offices and conference capabilities that facilitate research, collaboration, and demonstration were created. The Aperture Center project focuses on establishing a location that provides outreach, awareness, and demonstration of research findings, emerging technologies, and project developments to Sandia customers, visitors, and Mesa del Sol community members.

Torres, J. J.

2012-03-01T23:59:59.000Z

63

Power recycling for an interferometric gravitational wave  

E-Print Network [OSTI]

THESIS Power recycling for an interferometric gravitational wave detector Masaki Ando Department . . . . . . . . . . . . . . 48 3.3 Power recycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 3.3.1 Principle of power recycling . . . . . . . . . . . . . . . . . 50 3.3.2 Recycling cavity

Ejiri, Shinji

64

Synthetic Rubber  

Science Journals Connector (OSTI)

... acutely sensitive, justifiably, about synthetic rubber. His review of my book in NATURE of December 26, p. 751, is unfair in several respects. Undoubtedly, there are errors in ...

HARRY BARRON

1943-02-06T23:59:59.000Z

65

Synthetic aperture imaging for three dimensional resolution of fluid flows  

E-Print Network [OSTI]

Fluid mechanics and instrumentation have a long history together, as experimental fluids studies play an important role in describing a more complete physical picture in a variety of problems. Presently. state-of-the-art ...

Belden, Jesse (Jesse Levi)

2011-01-01T23:59:59.000Z

66

Scene estimation from speckled synthetic aperture radar imagery  

E-Print Network [OSTI]

, is studied by using both real and simulated SAR imagery. Using a number of commonly used metrics the Earth's surface regardless of weather conditions such as dust, cloud cover, and fog.1 Moreover

Santhanam, Balu

67

Synthetic aperture focusing techniques for ultrasonic imaging of solid objects.  

E-Print Network [OSTI]

technique (SAFT) has been used in non-destructive testing mainly in its simplest form that mimics acoustic a review of SAFT algorithms applied for post-processing of ultrasonic data acquired in non-destructive inspection of metals. The performance of SAFT in terms of its spatial resolution and suppression

68

Dipole aperture and superconductor requirements  

SciTech Connect (OSTI)

The cost of an accelerator is not proportional to the aperture. A change in aperture by a certain percentage results in an overall accelerator cost change by only a fraction of that percentage; the fraction may be between 0.1 and 0.5 and is almost independent of the bending field. This estimate is obtained by analyzing the superconductor requirements as a function of aperture and by making rough estimates of the largest cost items of the accelerator such as magnets and ring tunnel.

Wipf, S.L.

1983-12-11T23:59:59.000Z

69

Geothermal: Sponsored by OSTI -- Monitoring deformation at the...  

Office of Scientific and Technical Information (OSTI)

Monitoring deformation at the Geysers Geothermal Field, California, using C-band and X-band interferometric synthetic aperture radar Geothermal Technologies Legacy Collection Help...

70

Modeling Of Surface Deformation From Satellite Radar Interferometry...  

Open Energy Info (EERE)

interferometric synthetic aperture radar) analysis of two-year Radarsat satellite data covering the period May 2006 - March 2008. SAR scenes from two orbit geometries are...

71

On quantum interferometric measurements of temperature  

E-Print Network [OSTI]

We provide a detailed description of the interferometric thermometer, which is a device that estimates the temperature of a sample from measurements of the optical phase. For the first time, we rigorously analyze the operation of such a device by studying the interaction of the optical probe system with a heated sample. We find that this approach to thermometry is capable of measuring the temperature of a sample in the nK regime. Furthermore, we compare the theoretical precision of interferometric thermometers with the precision offered by the idealized pyrometers, which infer the temperature from a measurement of the total thermal radiation emitted by the sample.

Marcin Jarzyna; Marcin Zwierz

2014-12-17T23:59:59.000Z

72

Interferometric hydrofracture microseism localization using neighboring fracture  

E-Print Network [OSTI]

Interferometric hydrofracture microseism localization using neighboring fracture Oleg V. Poliannikov1 , Alison E. Malcolm1 , Hugues Djikpesse2 , and Michael Prange2 ABSTRACT Hydraulic fracturing is the process of injecting high-pressure fluids into a reservoir to induce fractures and thus improve reservoir

Malcolm, Alison

73

Finding Large Aperture Fractures in Geothermal Resource Areas Using a  

Open Energy Info (EERE)

Finding Large Aperture Fractures in Geothermal Resource Areas Using a Finding Large Aperture Fractures in Geothermal Resource Areas Using a Three-Component Long-Offset Surface Seismic Survey Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Finding Large Aperture Fractures in Geothermal Resource Areas Using a Three-Component Long-Offset Surface Seismic Survey Project Type / Topic 1 Recovery Act: Geothermal Technologies Program Project Type / Topic 2 Validation of Innovative Exploration Technologies Project Description Because fractures and faults with sub-commercial permeability can propagate hot fluid and hydrothermal alteration throughout a geothermal reservoir, potential field geophysical methods including resistivity, gravity, heatflow and magnetics cannot distinguish between low-permeability fractures and LAF's (Large Aperature Fractures). USG will develop and test the combination of three-component,long-offset seismic surveying, permanent scatter synthetic aperture radar interferometry (PSInSAR) and structural kinematic analysis as an integrated method for locating and 3-D mapping of LAF's in shallow to intermediate depth (600-4000 feet) geothermal systems. This project is designed to test the methodology on known occurrences of LAF's and then apply the technology to expand an existing production field and find a new production field in a separate but related resource area. A full diameter production well will be drilled into each of the two lease blocks covered by the geophysical exploration program.

74

Light passing through subwavelength apertures  

Science Journals Connector (OSTI)

This review provides a perspective on the recent developments in the transmission of light through subwavelength apertures in metal films. The main focus is on the phenomenon of extraordinary optical transmission in periodic hole arrays, discovered over a decade ago. It is shown that surface electromagnetic modes play a key role in the emergence of the resonant transmission. These modes are also shown to be at the root of both the enhanced transmission and beaming of light found in single apertures surrounded by periodic corrugations. This review describes both the theoretical and experimental aspects of the subject. For clarity, the physical mechanisms operating in the different structures considered are analyzed within a common theoretical framework. Several applications based on the transmission properties of subwavelength apertures are also addressed.

F. J. Garcia-Vidal, L. Martin-Moreno, T. W. Ebbesen, and L. Kuipers

2010-03-12T23:59:59.000Z

75

Large aperture diffractive space telescope  

DOE Patents [OSTI]

A large (10's of meters) aperture space telescope including two separate spacecraft--an optical primary objective lens functioning as a magnifying glass and an optical secondary functioning as an eyepiece. The spacecraft are spaced up to several kilometers apart with the eyepiece directly behind the magnifying glass "aiming" at an intended target with their relative orientation determining the optical axis of the telescope and hence the targets being observed. The objective lens includes a very large-aperture, very-thin-membrane, diffractive lens, e.g., a Fresnel lens, which intercepts incoming light over its full aperture and focuses it towards the eyepiece. The eyepiece has a much smaller, meter-scale aperture and is designed to move along the focal surface of the objective lens, gathering up the incoming light and converting it to high quality images. The positions of the two space craft are controlled both to maintain a good optical focus and to point at desired targets which may be either earth bound or celestial.

Hyde, Roderick A. (Livermore, CA)

2001-01-01T23:59:59.000Z

76

Medical imaging with coded apertures  

SciTech Connect (OSTI)

Now algorithms were investigated for image reconstruction in emission tomography which could incorporate complex instrumental effects such as might be obtained with a coded aperture system. The investigation focused on possible uses of the wavelet transform to handle non-stationary instrumental effects and analytic continuation of the Radon transform to handle self-absorption. Neither investigation was completed during the funding period and whether such algorithms will be useful remains an open question.

Keto, E.; Libby, S.

1995-06-16T23:59:59.000Z

77

Aperture Effects on Spectroscopic Galaxy Activity Classification  

E-Print Network [OSTI]

Activity classification of galaxies based on long-slit and fiber spectroscopy can be strongly influenced by aperture effects. Here we investigate how activity classification for 14 nearby galaxies depends on the proportion of the host galaxy's light that is included in the aperture. We use both observed long-slit spectra and simulated elliptical-aperture spectra of different sizes. The degree of change varies with galaxy morphology and nuclear activity type. Starlight removal techniques can mitigate but not remove the effect of host galaxy contamination in the nuclear aperture. Galaxies with extra-nuclear star formation can show higher [O III] {\\lambda}5007/H{\\beta} ratios with increasing aperture, in contrast to the naive expectation that integrated light will only dilute the nuclear emission lines. We calculate the mean dispersion for the diagnostic line ratios used in the standard BPT diagrams with respect to the central aperture of spectral extraction to obtain an estimate of the uncertainties resulting f...

Maragkoudakis, A; Ashby, M L N; Willner, S P

2014-01-01T23:59:59.000Z

78

Ion mobility spectrometer with virtual aperture grid  

DOE Patents [OSTI]

An ion mobility spectrometer does not require a physical aperture grid to prevent premature ion detector response. The last electrodes adjacent to the ion collector (typically the last four or five) have an electrode pitch that is less than the width of the ion swarm and each of the adjacent electrodes is connected to a source of free charge, thereby providing a virtual aperture grid at the end of the drift region that shields the ion collector from the mirror current of the approaching ion swarm. The virtual aperture grid is less complex in assembly and function and is less sensitive to vibrations than the physical aperture grid.

Pfeifer, Kent B. (Los Lunas, NM); Rumpf, Arthur N. (Albuquerque, NM)

2010-11-23T23:59:59.000Z

79

Solar Central Receiver with an Irising Aperture  

E-Print Network [OSTI]

. If the aperture is small, it will be inefficient for periods when the solar isolation is inclined due to spillage. However, if the aperture is large, it will be inefficient for periods when the solar isolation is normal, due to excess heat radiation and convection...

Galal, T.; Kulaib, A. M.; Abuzaid, M.

2010-01-01T23:59:59.000Z

80

Handbook of Synthetic Photochemistry  

Science Journals Connector (OSTI)

Handbook of Synthetic Photochemistry ... Comprehensive overviews of synthetically relevant photochemical processes have appeared previously, most recently in Synthetic Organic Photochemistry, edited by Griesbeck and Mattay (2005), and in the CRC Handbook of Organic Photochemistry and Photobiology, edited by Horspool and Lenci (2004). ... Handbook of Synthetic Photochemistry . ...

Frederick G. West

2010-10-11T23:59:59.000Z

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

Interferometric tomography of fuel cells for monitoring membrane water content  

E-Print Network [OSTI]

We have developed a system that uses two 1D interferometric phase projections for reconstruction of 2D water content changes over time in situ in a proton exchange membrane (PEM) fuel cell system. By modifying the filtered ...

Waller, Laura

82

Variable aperture collimator for high energy radiation  

DOE Patents [OSTI]

An apparatus is disclosed providing a variable aperture energy beam collimator. A plurality of beam opaque blocks are in sliding interface edge contact to form a variable aperture. The blocks may be offset at the apex angle to provide a non-equilateral aperture. A plurality of collimator block assemblies may be employed for providing a channel defining a collimated beam. Adjacent assemblies are inverted front-to-back with respect to one another for preventing noncollimated energy from emerging from the apparatus. An adjustment mechanism comprises a cable attached to at least one block and a hand wheel mechanism for operating the cable. The blocks are supported by guide rods engaging slide brackets on the blocks. The guide rods are pivotally connected at each end to intermediate actuators supported on rotatable shafts to change the shape of the aperture. A divergent collimated beam may be obtained by adjusting the apertures of adjacent stages to be unequal.

Hill, Ronald A. (Albuquerque, NM)

1984-05-22T23:59:59.000Z

83

LED Emission through Sub-Wavelength Apertures  

Science Journals Connector (OSTI)

A gold film with a hexagonal array of sub-wavelength apertures has been fabricated onto the emitting surface of a semiconductor light emitting diode. Interaction of the light with...

Harries, Michael D; Summers, Huw D

84

Multi-channel coded-aperture photography  

E-Print Network [OSTI]

This thesis describes the multi-channel coded-aperture photography, a modified camera system that can extract an all-focus image of the scene along with a depth estimate over the scene. The modification consists of inserting ...

Baek, Jongmin

2008-01-01T23:59:59.000Z

85

Adaptive coherent interferometric imaging for sensor networks Gregoire Derveauxa)  

E-Print Network [OSTI]

with distributed sensor networks is presented. The sensors record the impulse response of the unknown background imaging when the background is known is considered in Ref.8. The sensors record an approximate impulseAdaptive coherent interferometric imaging for sensor networks Gr´egoire Derveauxa) INRIA Domaine de

Papanicolaou, George C.

86

Photovoltaic converter having apertured reflective enclosure  

SciTech Connect (OSTI)

This patent describes a photovoltaic converter. It comprises: a photovoltaic cell having an incident face upon which light is directed to cause photogeneration; an enclosure over the incident face, the wall of the enclosure having a reflective inner surface spaced apart from the incident face to permit light reflected from the incident face to be re-reflected by the inner surface and back to the photovoltaic cell; and an aperture through the wall of the enclosure to permit light to fall directly upon the voltaic cell. The ratio of the area of the aperture to the are of the incident face of the photovoltaic cell is less than about 0.2.

Sinton, R.A.; Swanson, R.M.

1990-10-02T23:59:59.000Z

87

Synthetic biology: Cultural divide  

Science Journals Connector (OSTI)

... Currently based at the software-design firm Autodesk in San Francisco, California, Hessel represents an increasingly impatient and outspoken faction of synthetic ...

Bryn Nelson

2014-05-07T23:59:59.000Z

88

Project Profile: Improved Large Aperture Collector Manufacturing  

Broader source: Energy.gov [DOE]

Abengoa Solar, under the Solar Manufacturing Technology (SolarMat) program, will be investigating the use of an automotive-style high-rate fabrication and automated assembly techniques to achieve a substantial reduction in the deployment cost of their new SpaceTube advanced large aperture parabolic trough collector.

89

Formalizing Synthetic Domain Theory  

Science Journals Connector (OSTI)

Synthetic Domain Theory (SDT) is a constructive variant of Domain Theory where all functions are continuous following Dana Scotts idea of domains as sets. Recently there have been suggested more abstract axiomatizations encompassing ... Keywords: LCF, domain theory, formal verification, programming logics, synthetic domain theory, type theory

Bernhard Reus

1999-11-01T23:59:59.000Z

90

Dual aperture dipole magnet with second harmonic component  

DOE Patents [OSTI]

An improved dual aperture dipole electromagnet includes a second-harmonic frequency magnetic guide field winding which surrounds first harmonic frequency magnetic guide field windings associated with each aperture. The second harmonic winding and the first harmonic windings cooperate to produce resultant magnetic waveforms in the apertures which have extended acceleration and shortened reset portions of electromagnet operation.

Praeg, W.F.

1983-08-31T23:59:59.000Z

91

Vacuum aperture isolator for retroreflection from laser-irradiated target  

DOE Patents [OSTI]

The disclosure is directed to a vacuum aperture isolator for retroreflection of a laser-irradiated target. Within a vacuum chamber are disposed a beam focusing element, a disc having an aperture and a recollimating element. The edge of the focused beam impinges on the edge of the aperture to produce a plasma which refracts any retroreflected light from the laser's target.

Benjamin, Robert F. (Los Alamos, NM); Mitchell, Kenneth B. (Los Alamos, NM)

1980-01-01T23:59:59.000Z

92

Phase projection using three satellites  

E-Print Network [OSTI]

This study seeks to investigate various techniques used in Interferometric Synthetic Aperture Radar (InSAR) during the phase unwrapping process and the noise filtering step. In particular, as intuition would follow, we ...

Yeung, Michael C. (Michael Chi-Hang)

2007-01-01T23:59:59.000Z

93

Analysis of ground subsidence in coal mining area using SAR interferometry  

Science Journals Connector (OSTI)

This study presents the application of interferometric synthetic aperture radar (InSAR), small baseline subset (SBAS) algorithm and GIS for subsidence analysis in a mining area located at Gangwon-do, Korea. Se...

Jin Baek; Sang-Wan Kim; Hyuck-Jin Park; Hyung-Sup Jung; Ki-Dong Kim

2008-09-01T23:59:59.000Z

94

Designing Synthetic Biology  

Science Journals Connector (OSTI)

(14) The science of biology and the practice of engineering (knowing and making(15)) are especially connected in parts-based synthetic biology, where many engineers and scientists seek to build life to understand it through the assembly of standardized genetic modules. ... This iterative refinement of the refactored operon led to a detailed mapping of the genetic design space and an engineered pathway that produced wild-type levels of nitrogen fixation. ... (22) The positive feedback between science and engineering in synthetic biology has been compared to the history of other disciplines and industries, such as aviation(23) or synthetic chemistry. ...

Christina M. Agapakis

2013-10-24T23:59:59.000Z

95

Parameters for HL-LHC aperture calculations and comparison with aperture measurements  

E-Print Network [OSTI]

When ?? is squeezed to smaller values in the LHC, the beam size in the inner triplet increases so that the aperture risks to be exposed to unwanted beam losses. A 2D calculation model was used during the design stage to study the aperture margins, both there and at other potential bottlenecks. Based on assumptions on orbit and optics errors, as well as mechanical tolerances, it gives the available aperture in units of the RMS beam size, which can be compared with what can be protected by the collimation system. During the LHC Run I in 2010-2013, several of the error tolerances have been found smaller than the design assumptions. Furthermore, the aperture has been measured with beam several times and the results are compatible with a very well aligned machine, with results close to the design values. In this report, we therefore review the assumptions in the model and propose an updated set of input parameters to be used for aperture calculations at top energy in HL-LHC. The new parameter set is based on th...

Bruce, R; Fartoukh, S; Giovannozzi, M; Redaelli, S; Tomas, R; Wenninger, J

2014-01-01T23:59:59.000Z

96

Research Councils UK Synthetic biology  

E-Print Network [OSTI]

, bioinformatics approaches and DNA synthesis, all of which are central to the current field of synthetic biologyResearch Councils UK Synthetic biology #12;Synthetic biology Research funded by the Research them commercially. Synthetic biology is one of `Eight Great Technologies' identified by the Chancellor

Berzins, M.

97

LOCALIZATION OF DEFECTS IN PIPES USING GUIDED WAVES AND SYNTHETIC APERTURE FOCUSSING TECHNIQUE (SAFT)  

E-Print Network [OSTI]

, 2011, the federal government decided to shut down the nuclear power plants until 2022 and announced problem is solved by the simulation soft- ware Wave3000Plus to determine well-suited wave modes a cylin- drical test structure were performed to verify the simulation results. Varying wave modes provide

Boyer, Edmond

98

Automatic position calculating imaging radar with low-cost synthetic aperture sensor for imaging layered media  

DOE Patents [OSTI]

An imaging system for analyzing structures comprises a radar transmitter and receiver connected to a timing mechanism that allows a radar echo sample to be taken at a variety of delay times for each radar pulse transmission. The radar transmitter and receiver are coupled to a position determining system that provides the x,y position on a surface for each group of samples measured for a volume from the surface. The radar transmitter and receiver are moved about the surface to collect such groups of measurements from a variety of x,y positions. Return signal amplitudes represent the relative reflectivity of objects within the volume and the delay in receiving each signal echo represents the depth at which the object lays in the volume and the propagation speeds of the intervening material layers. Successively deeper z-planes are backward propagated from one layer to the next with an adjustment for variations in the expected propagation velocities of the material layers that lie between adjacent z-planes. 10 figs.

Mast, J.E.

1998-08-18T23:59:59.000Z

99

An Approach to Ground Moving Target Indication Using Multiple Resolutions of Multilook Synthetic Aperture Radar Images  

E-Print Network [OSTI]

?cations relating Kalman ?ltering, iterative MMSE, RLS, and back projection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 3.3 DWT synthesis ?lter bank tree . . . . . . . . . . . . . . . . . . . . . 57 3.4 Haar scaling function and wavelet... . . . . . . . . . . . . . . . . . . . . 58 3.5 Haar wavelet, compressed wavelet, and compressed and translated wavelet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 3.6 One-dimensional DWT demo using sine wave . . . . . . . . . . . . . . 60 3.7 One-dimensional DWT...

Akers, Geoffrey

2009-12-15T23:59:59.000Z

100

Wind/Rain Backscatter Modeling and Wind/Rain Retrieval for Scatterometer and Synthetic Aperture Radar.  

E-Print Network [OSTI]

??Using co-located space-borne satellite (TRMM PR, ESCAT on ERS 1/2) measurements, and numerical predicted wind fields (ECMWF), the sensitivity of C-band backscatter measurement to rain (more)

Nie, Congling

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

DETECTION OF FAST TRANSIENTS WITH RADIO INTERFEROMETRIC ARRAYS  

SciTech Connect (OSTI)

Next-generation radio arrays, including the Square Kilometre Array (SKA) and its pathfinders, will open up new avenues for exciting transient science at radio wavelengths. Their innovative designs, comprising a large number of small elements, pose several challenges in digital processing and optimal observing strategies. The Giant Metre-wave Radio Telescope (GMRT) presents an excellent test-bed for developing and validating suitable observing modes and strategies for transient experiments with future arrays. Here we describe the first phase of the ongoing development of a transient detection system for GMRT that is planned to eventually function in a commensal mode with other observing programs. It capitalizes on the GMRT's interferometric and sub-array capabilities, and the versatility of a new software backend. We outline considerations in the plan and design of transient exploration programs with interferometric arrays, and describe a pilot survey that was undertaken to aid in the development of algorithms and associated analysis software. This survey was conducted at 325 and 610 MHz, and covered 360 deg{sup 2} of the sky with short dwell times. It provides large volumes of real data that can be used to test the efficacies of various algorithms and observing strategies applicable for transient detection. We present examples that illustrate the methodologies of detecting short-duration transients, including the use of sub-arrays for higher resilience to spurious events of terrestrial origin, localization of candidate events via imaging, and the use of a phased array for improved signal detection and confirmation. In addition to demonstrating applications of interferometric arrays for fast transient exploration, our efforts mark important steps in the roadmap toward SKA-era science.

Bhat, N. D. R. [International Centre for Radio Astronomy Research, Curtin University, Bentley, WA 6102 (Australia)] [International Centre for Radio Astronomy Research, Curtin University, Bentley, WA 6102 (Australia); Chengalur, J. N.; Gupta, Y.; Prasad, J.; Roy, J.; Kudale, S. S. [National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, Pune 411007 (India)] [National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, Pune 411007 (India); Cox, P. J.; Bailes, M.; Burke-Spolaor, S.; Van Straten, W. [Centre for Astrophysics and Supercomputing, Swinburne University, Hawthorn, Victoria 3122 (Australia)] [Centre for Astrophysics and Supercomputing, Swinburne University, Hawthorn, Victoria 3122 (Australia)

2013-05-01T23:59:59.000Z

102

Extraordinary optical transmission through patterned subwavelength apertures.  

SciTech Connect (OSTI)

Light propagating through a subwavelength aperture can be dramatically increased by etching a grating in the metal around the hole. Moreover, light that would typically broadly diverge when passing through an unpatterned subwavelength hole can be directed into a narrow beam by utilizing a specific pattern around the aperture. While the increased transmission and narrowed angular emission appear to defy far-field diffraction theory, they are consistent with a fortuitous plasmon/photon coupling. In addition, the coupling between photons and surface plasmons affects the emissivity of a surface comprised of such structures. These properties are useful across several strategic areas of interest to Sandia. A controllable emission spectrum could benefit satellite and military application areas. Photolithography and near-field microscopy are natural applications for a system that controls light beyond the diffraction limit in a manner that is easily parallelizable. Over the one year of this LDRD, we have built or modified the numerical tools necessary to model such structures. These numerical codes and the knowledge base for using them appropriately will be available in the future for modeling work on surface plasmons or other optical modeling at Sandia. Using these tools, we have designed and optimized structures for various transmission or emission properties. We demonstrate the ability to design a metallic skin with an emissivity peak at a pre-determined wavelength in the spectrum. We optimize structures for maximum light transmission and show transmitted beams that beat the far-field diffraction limit.

Kemme, Shanalyn A.; El-Kady, Ihab Fathy; Hadley, G. Ronald; Peters, David William; Lanes, Chris E.

2004-12-01T23:59:59.000Z

103

Finding Large Aperture Fractures in Geothermal Resource Areas...  

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

Seismic Survey DOE Geothermal Peer Review 2010 - Presentation. Project summary: Drilling into large aperture open fractures (LAFs) typically yield production wells with...

104

Diffraction from oxide confinement apertures in vertical-cavity lasers  

SciTech Connect (OSTI)

Direct measurement of scattered fields from oxide confinement apertures in vertical-cavity lasers is presented. Diffraction fringes associated with each transverse lasing mode are detected in the far field from devices with varying oxide aperture dimensions and with quantum efficiencies as high as 48{percent}. The diffracted pattern symmetries match the rectangular symmetry of the oxide apertures present in the devices and fringe locations are compared to Fraunhofer theory. The fraction of power diffracted from the lasing mode remains roughly constant as a function of relative pump rate, but is shown to depend on both transverse mode order and oxide aperture size. {copyright} {ital 1999 American Institute of Physics.}

Roos, P.A.; Carlsten, J.L. [Montana State University, Department of Physics, Bozeman, Montana 59717 (United States)] [Montana State University, Department of Physics, Bozeman, Montana 59717 (United States); Kilper, D.C. [University of North Carolina at Charlotte, Department of Physics, Charlotte, North Carolina 28223 (United States)] [University of North Carolina at Charlotte, Department of Physics, Charlotte, North Carolina 28223 (United States); Lear, K.L. [MicroOptical Devices Inc., 5601C Midway Park Pl. NE, Albuquerque, New Mexico 87109 (United States)] [MicroOptical Devices Inc., 5601C Midway Park Pl. NE, Albuquerque, New Mexico 87109 (United States)

1999-08-01T23:59:59.000Z

105

Single molecule fluorescence in rectangular nano-apertures  

Science Journals Connector (OSTI)

Fluorescence Correlation Spectroscopy is used to investigate fluorescent molecules in solution diffusing in subwavelength rectangular apertures milled in Aluminium films. This...

Wenger, Jrme; Lenne, Pierre-Franois; Popov, Evgueni; Rigneault, Herv; Dintinger, Jos; Ebbesen, Thomas

2005-01-01T23:59:59.000Z

106

Functionalized apertures for the detection of chemical and biological materials  

DOE Patents [OSTI]

Disclosed are nanometer to micron scale functionalized apertures constructed on a substrate made of glass, carbon, semiconductors or polymeric materials that allow for the real time detection of biological materials or chemical moieties. Many apertures can exist on one substrate allowing for the simultaneous detection of numerous chemical and biological molecules. One embodiment features a macrocyclic ring attached to cross-linkers, wherein the macrocyclic ring has a biological or chemical probe extending through the aperture. Another embodiment achieves functionalization by attaching chemical or biological anchors directly to the walls of the apertures via cross-linkers.

Letant, Sonia E. (Livermore, CA); van Buuren, Anthony W. (Livermore, CA); Terminello, Louis J. (Danville, CA); Thelen, Michael P. (Danville, CA); Hope-Weeks, Louisa J. (Brentwood, CA); Hart, Bradley R. (Brentwood, CA)

2010-12-14T23:59:59.000Z

107

Biodegradable synthetic bone composites  

DOE Patents [OSTI]

The invention provides for a biodegradable synthetic bone composition comprising a biodegradable hydrogel polymer scaffold comprising a plurality of hydrolytically unstable linkages, and an inorganic component; such as a biodegradable poly(hydroxyethylmethacrylate)/hydroxyapatite (pHEMA/HA) hydrogel composite possessing mineral content approximately that of human bone.

Liu, Gao; Zhao, Dacheng; Saiz, Eduardo; Tomsia, Antoni P.

2013-01-01T23:59:59.000Z

108

Interferometric results from the Boeing grazing incidence FEL ring resonator  

Science Journals Connector (OSTI)

The Boeing HAP (High Average Power) experiment was reconfigured throughout 19891990 to incorporate a grazing incidence, 133 m round-trip ring resonator. Initial spectra, mode stability, coherence length, and interferometric wavefront quality measurements have been taken. This paper reports on the optical measurement techniques and data used to characterize the resonator optical output as having an optical path difference (OPD) of 2.0 to 2.5 optical wavelengths. A basic data-reduction methodology and analysis supporting the subtraction of effects caused by the 7 beam reducer, fold mirrors, and the radial shear interferometer itself Noteworthy observations, such as the ability to overlay interferometric fringe data over the length of a macropulse (? 180 micropulses) without destroying the fringe visibility, and the occurrence of centrally localized (? 30% of the diameter) disturbances of the fringe pattern are also discussed. Coherence length measurements, made using the interferometer, showed the coherence length to be between 64 and 120 ?m. Attempts to measure the micropulse-to-micropulse mode stability were made and are discussed as well.

D.A. Byrd; S.C. Bender; E.L. Miller; D.H. Dowell

1992-01-01T23:59:59.000Z

109

BAYESIAN ANGULAR POWER SPECTRUM ANALYSIS OF INTERFEROMETRIC DATA  

SciTech Connect (OSTI)

We present a Bayesian angular power spectrum and signal map inference engine which can be adapted to interferometric observations of anisotropies in the cosmic microwave background (CMB), 21 cm emission line mapping of galactic brightness fluctuations, or 21 cm absorption line mapping of neutral hydrogen in the dark ages. The method uses Gibbs sampling to generate a sampled representation of the angular power spectrum posterior and the posterior of signal maps given a set of measured visibilities in the uv-plane. We use a mock interferometric CMB observation to demonstrate the validity of this method in the flat-sky approximation when adapted to take into account arbitrary coverage of the uv-plane, mode-mode correlations due to observations on a finite patch, and heteroschedastic visibility errors. The computational requirements scale as O(n{sub p} log n{sub p}) where n{sub p} measures the ratio of the size of the detector array to the inter-detector spacing, meaning that Gibbs sampling is a promising technique for meeting the data analysis requirements of future cosmology missions.

Sutter, P. M.; Wandelt, Benjamin D. [Department of Physics, 1110 West Green Street, University of Illinois at Urbana-Champaign, Urbana, IL 61801 (United States); Malu, Siddarth S. [Raman Research Institute, C V Raman Avenue, Bangalore 560080 (India)

2012-09-15T23:59:59.000Z

110

Life after the synthetic cell Natureaskedeightsynthetic-biologyexpertsabouttheimplicationsforscienceandsocietyofthe"synthetic  

E-Print Network [OSTI]

already had confidence in our ability to make synthetic DNA and get it to function in cells. The grandLife after the synthetic cell Natureaskedeightsynthetic-biologyexpertsabouttheimplicationsforscienceandsocietyofthe"synthetic"madebytheJ.CraigVenterInstitute(JCVI).Theinstitute'steamassembled,modifiedandimplanteda synthesizedgenomeintoaDNA-freebacterialshelltomakeaself-replicatingMycoplasmamycoides. The power and the pitfalls Mark

Goldberg, Bennett

111

Synthetic Rubber Production in Canada  

Science Journals Connector (OSTI)

... called the Polymer Corporation, Ltd., with headquarters in Toronto, which will undertake the production in Canada of synthetic ... in Canada of synthetic rubber of the Buna type. According to the Ottawa correspondent of The Times, Mr. ...

1942-03-21T23:59:59.000Z

112

INTRODUCTION Synthetic biology: history, challenges  

E-Print Network [OSTI]

at a rapid pace over the last 35 years, the cloning and assembly of synthetic DNA sequences remains a largely to establish improved software and bio- logical tools for the design and assembly of synthetic DNA synthetic systems to be described at the level of logical interactions between DNA

Haseloff, Jim

113

TECHNOLOGY DEVELOPMENT PROJECT PLAN Advanced Technology Large Aperture Space Telescope  

E-Print Network [OSTI]

(ATLAST) A Roadmap for UVIOR Technology, 2010-2020 24 April, 2009 T. Tupper Hyde, ATLAST TechnologistTECHNOLOGY DEVELOPMENT PROJECT PLAN for the Advanced Technology Large Aperture Space Telescope, and Ronald Polidan. #12;Advanced Technology Large-Aperture Space Telescope (ATLAST) 22 TABLE OF CONTENTS 1

Sirianni, Marco

114

Fracture aperture reconstruction and determination of hydrological properties: a  

E-Print Network [OSTI]

Fracture aperture reconstruction and determination of hydrological properties: a case study for fracture aperture reconstruction. The rst one is a correlation technique that estimates the normal aper techniques are applied to discontinuities extracted from a core drilled down to 20 m in a fractured marl

Toussaint, Renaud

115

Synthetic Biology and Metabolic Engineering  

Science Journals Connector (OSTI)

As such, it deals with the engineering (design, construction, and optimization) of native as well as non-natural routes of product synthesis, aided in this task by the availability of synthetic DNA, the core enabling technology of synthetic biology. ... In this context, metabolic engineering is about engineering cell factories for the biological manufacturing of chemical and pharmaceutical products, whereas the main focus of synthetic biology is fundamental biological research facilitated by the use of synthetic DNA and genetic circuits. ... This was soon followed by the emergence of companies offering synthetic DNA as product. ...

Gregory Stephanopoulos

2012-11-01T23:59:59.000Z

116

Differentiating surface and bulk interactions in nanoplasmonic interferometric sensor arrays  

E-Print Network [OSTI]

Detecting specific target analytes and differentiating them from interfering background effects is a crucial but challenging task in complex multi-component solutions commonly encountered in environmental, chemical, biological, and medical sensing applications. Here we present a simple nanoplasmonic interferometric sensor platform that can differentiate the adsorption of a thin protein layer on the sensor surface (surface effects) from bulk refractive index changes (interfering background effects) at a single sensing spot, exploiting the different penetration depths of multiple propagating surface plasmon polaritons excited in the ring-hole nanostructures. A monolayer of bovine serum albumin (BSA) molecules with an effective thickness of 1.91nm is detected and differentiated from a 10-3 change in the bulk refractive index unit of the solution. The noise level of the retrieved real-time sensor output compares favorably with traditional prism-based surface plasmon resonance sensors, but is achieved using a sign...

Zeng, Beibei; Bartoli, Filbert J

2014-01-01T23:59:59.000Z

117

Interferometric investigation of optical breakdown in air at  

Science Journals Connector (OSTI)

An investigation was made of the thermal processes which accompany optical breakdown in air at the surface of a metallic target. A titanium target was subjected to radiation of power density ~0.3 MW/cm2 from a CO2 gas-discharge laser, for a period of ~ 1 msec. The use of interferometric diagnostics having adequate spatial and temporal resolution (~300 ? and ~30 usec) made it possible to describe the heating of the air at the target surface before breakdown, the formation and propagation of the breakdown plasma, the absorption of laser radiation in it, and the heating of the air by the plasma. Estimates were made of the plasma parameters.

A V Bondarenko; V P Voronina; I I Gorodnicheva; E V Dan'shchikov; A I Zakharchenko; F V Lebedev; A V Ryazanov; M M Smakotin

1980-01-01T23:59:59.000Z

118

E-Print Network 3.0 - aperture imaging opportunities Sample Search...  

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

University Collection: Engineering ; Physics 2 PAPER 2004-230 Investigating Fracture Aperture Distributions Summary: . Keller14 imaged the fracture apertures using X-ray...

119

E-Print Network 3.0 - aperture flow imaging Sample Search Results  

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

Institute of Technology Collection: Engineering 3 PAPER 2004-230 Investigating Fracture Aperture Distributions Summary: to correction. ABSTRACT Fracture aperture is usually...

120

The effect of synchrobetatron coupling on the dynamic aperture  

SciTech Connect (OSTI)

The effect of synchrobetatron coupling on the dynamic aperture was studied by comparing the dynamic aperture for a particle with a large fixed {Delta}p/p, no synchrotron oscillations present, with the dynamic aperture for a particle, with a synchrotron oscillation amplitude, of the same {Delta}p/p. The particle with the synchrotron oscillation present was found to have a smaller dynamic aperture than the particle with the fixed {Delta}p/p. It is suggested that this reduction in dynamic aperture may be due to non-linear coupling between the longitudinal and transverse motions. For RHIC, whose lattice and rf were used in this study, the longitudinal phase space is much larger than the transverse phase space, by a factor of several thousand, and a small amount of coupling can cause considerable growth in the transverse motion. The effect is most pronounced at lower energies in RHIC, where larger momentum spread and transverse amplitudes are required. At {gamma} = 30 in RHIC, with a synchrotron oscillation amplitude of {Delta}p/p = 0.005, the dynamic aperture is reduced by about 6 mm by the presence of the synchrotron oscillations. The effect may be more important for RHIC than for other superconducting proton colliders, because of its relatively low energy and because of the importance of intrabeam scattering for heavy ions. This results in larger dynamic aperture requirements for RHIC both in transverse space and in momentum spread.

Parzen, G.

1992-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

The effect of synchrobetatron coupling on the dynamic aperture  

SciTech Connect (OSTI)

The effect of synchrobetatron coupling on the dynamic aperture was studied by comparing the dynamic aperture for a particle with a large fixed {Delta}p/p, no synchrotron oscillations present, with the dynamic aperture for a particle with a synchrotron oscillation amplitude of the same {Delta}p/p. The particle with the synchrotron oscillation present was found to have a smaller dynamic aperture than that of the particle with the fixed {Delta}p/p. It is suggested that this reduction in dynamic aperture may be due to a non-linear coupling between the longitudinal and transverse motions. For RHIC, whose lattice and RF were used in this study, the longitudinal phase space is much larger than the transverse phase space by a factor of several thousand, and a small amount of coupling can cause considerable growth in the transverse motion. The effect is most pronounced at lower energies in RHIC, where larger momentum spread and transverse amplitudes are required. At {gamma} = 30 in RHIC, with a synchrotron oscillation amplitude of {Delta}p/p = 0.005, the dynamic aperture is reduced by about 6 mm by the presence of the synchrotron oscillations. The effect may be more important for RHIC than for other superconducting proton colliders, because of its relatively low energy and because of the importance of intrabeam scattering for heavy ions. This results in larger dynamic aperture requirements for RHIC both in transverse space and in momentum spread.

Parzen, G.

1993-03-01T23:59:59.000Z

122

The effect of synchrobetatron coupling on the dynamic aperture  

SciTech Connect (OSTI)

The effect of synchrobetatron coupling on the dynamic aperture was studied by comparing the dynamic aperture for a particle with a large fixed [Delta]p/p, no synchrotron oscillations present, with the dynamic aperture for a particle with a synchrotron oscillation amplitude of the same [Delta]p/p. The particle with the synchrotron oscillation present was found to have a smaller dynamic aperture than that of the particle with the fixed [Delta]p/p. It is suggested that this reduction in dynamic aperture may be due to a non-linear coupling between the longitudinal and transverse motions. For RHIC, whose lattice and RF were used in this study, the longitudinal phase space is much larger than the transverse phase space by a factor of several thousand, and a small amount of coupling can cause considerable growth in the transverse motion. The effect is most pronounced at lower energies in RHIC, where larger momentum spread and transverse amplitudes are required. At [gamma] = 30 in RHIC, with a synchrotron oscillation amplitude of [Delta]p/p = 0.005, the dynamic aperture is reduced by about 6 mm by the presence of the synchrotron oscillations. The effect may be more important for RHIC than for other superconducting proton colliders, because of its relatively low energy and because of the importance of intrabeam scattering for heavy ions. This results in larger dynamic aperture requirements for RHIC both in transverse space and in momentum spread.

Parzen, G.

1993-03-01T23:59:59.000Z

123

A New Algorithm for Processing Interferometric Data-Stacks: SqueeSAR | Open  

Open Energy Info (EERE)

A New Algorithm for Processing Interferometric Data-Stacks: SqueeSAR A New Algorithm for Processing Interferometric Data-Stacks: SqueeSAR Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: A New Algorithm for Processing Interferometric Data-Stacks: SqueeSAR Abstract Permanent Scatterer SAR Interferometry (PSInSAR) aims to identify coherent radar targets exhibiting high phase stability over the entire observation time period. These targets often correspond to point-wise, man-made objects widely available over a city, but less present in non-urban areas. To overcome the limits of PSInSAR, analysis of interferometric data-stacks should aim at extracting geophysical parameters not only from point-wise deterministic objects (i.e., PS), but also from distributed scatterers (DS). Rather than developing hybrid processing chains where two or more

124

Impact of backscattered light in a squeezing-enhanced interferometric gravitational-wave detector  

E-Print Network [OSTI]

Squeezed states of light have been recently used to improve the sensitivity of laser-interferometric gravitational-wave detectors beyond the quantum limit. To completely establish quantum engineering as a realistic option ...

Chua, S S Y

125

ARTIFICIAL NEURAL NETWORK ANALYSIS IN INTERFEROMETRIC THz IMAGING FOR DETECTION OF LETHAL AGENTS  

Science Journals Connector (OSTI)

In the context of a non-invasive, non-contact method to detect concealed lethal agents employing stand-off imaging in the Terahertz (THz) range using an interferometric detector array, the techniques of image ana...

Aparajita Bandyopadhyay; Amartya Sengupta

2006-08-01T23:59:59.000Z

126

Large-Aperture Segmented Mirror Telescope Design Concept  

E-Print Network [OSTI]

(ATLAS) Telescope: A Technology Roadmap for the Next Decade Principal Investigator: Dr. Marc Postman .............................................................................................13 5 Technology Roadmap................................................................109 #12;Advanced Technology Large-Aperture Space Telescope: A Technology Roadmap for the Next Decade 2

Sirianni, Marco

127

Receiver for solar energy collector having improved aperture aspect  

DOE Patents [OSTI]

A secondary concentrator for use in receiver systems for linear focusing primary concentrators is provided with reflector wings at each end. The wings increase the capture of light rays reflected from areas adjacent the rim of a primary concentrator, increasing the apparent aperture size of the absorber as viewed from the rim of the primary concentrator. The length, tilt, and curvature of the wing reflectors can be adjusted to provide an absorber having a desired aperture aspect.

McIntire, William R. (Downers Grove, IL)

1984-01-01T23:59:59.000Z

128

Effective Aperture of a Large Pseudorandom Low-Frequency  

E-Print Network [OSTI]

(LWA) LWA Station State of New Mexico, USA Aperture synthesis radio telescope · About 50 "stations" across New Mexico · Each station is an array of many elements · 20 - 80 MHz (at least) Project Status 16.6562 for Realistic = 3.0 in E-Plane = 0.5 in H-Plane [m2] Crude Estimate for Single Stand #12;8 Effective Aperture

Ellingson, Steven W.

129

Performance comparison of fiber tips in interferometric displacement mesurements  

SciTech Connect (OSTI)

Fiber optic displacement sensors have many potential advantages over traditional displacement measurement techniques, including small size, immunity to electromagnetic interference, electrical isolation, and high resolution. In this report, we focus on an interferometric fiber optic sensor, where the gap between the fiber tip and the device under test forms a Fabry-Perot resonant cavity. An optical interrogator measures the reflected intensity at wavelengths ranging from 1510 to 1590 nm. The spacing between resonant frequencies allows us to determine the distance from the tip to the device under test. We consider ferrule connector angled physical contact (FC/APC), ferrule connector ultra physical contact (FC/UPC) and unpolished cleaved tips and compare their influence on sensor performance. A plane wave propagation model is proposed for predicting tip effects. Comparisons are made on the basis of sensor measurement range, resolution, and sensitivity to changes in test conditions. In this paper, we discuss the experimental setup, detail our analysis, and present test results with recommendations for the applications of each tip.

Moro, Erik [Los Alamos National Laboratory; Grahn, Rick R [Los Alamos National Laboratory; Karimi, Hussain H [Los Alamos National Laboratory; Wilson, Kyle L [Los Alamos National Laboratory; Puckett, Anthony D [Los Alamos National Laboratory

2011-01-24T23:59:59.000Z

130

DISTRIBUTED AND COLLABORATIVE SYNTHETIC ENVIRONMENTS  

E-Print Network [OSTI]

the functions required for the geometric engine of a synthetic environment system. · A distribution on networked desktop machines. Geometric Engine A critical subsystem in all synthetic environment systems is the geometric engine, or the software module responsible for creating a realistic view of the simulated world

Texas at Austin, University of

131

Synthetic biology: Understanding biological design from synthetic circuits  

E-Print Network [OSTI]

An important aim of synthetic biology is to uncover the design principles of natural biological systems through the rational design of gene and protein circuits. Here, we highlight how the process of engineering biological ...

Mukherji, Shankar

132

Synthetic and Mechanistic Chemistry publications  

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

Synthetic and Mechanistic Chemistry » Synthetic and Mechanistic Chemistry » Synthetic and Mechanistic Synthetic and Mechanistic publications Research into alternative forms of energy, especially energy security, is one of the major national security imperatives of this century. Get Expertise Dave Thorn Chemistry Program Manager Email Josh Smith Chemistry Communications Email "Research into alternative forms of energy, of which biofuels is a key component, is one of the major national security imperatives of this century. Energy security is vital to our future national security and the efficient functioning of our market economy." -LANL Director Charles McMillan Harshini Mukundan, Hongzhi Xie, Aaron S. Anderson, W. Kevin Grace, John E. Shively, and Basil I. Swanson, "Optimizing a waveguide-based sandwich immunoassay for tumor biomarkers: Evaluating fluorescent labels and functional surfaces," Bioconjugate Chemistry 20(2), 222-230 (2009).

133

Exoelectron Emission from Synthetic Corundums  

Science Journals Connector (OSTI)

...Radiation Protection Dosimetry Article Exoelectron Emission from Synthetic Corundums M. Yousif Charif R. Gout J. Barthe M. Petel Corundums (Alpha Al2O3) have been synthesised by the thermal dehydration of hydrargilite (Al2O3, H2O......

M. Yousif Charif; R. Gout; J. Barthe; M. Petel

1983-05-01T23:59:59.000Z

134

Monomers for Synthetic Rubber Production  

Science Journals Connector (OSTI)

The purpose of this chapter is to describe briefly industrial processes for the manufacture of the more common of the olefinic monomers which are used in the production of synthetic rubbers. Some indication of th...

D. C. Blackley B.Sc.; Ph.D.; F.P.R.I.

1983-01-01T23:59:59.000Z

135

Synthetic biology and crop engineering  

Broader source: Energy.gov [DOE]

Breakout Session 2: Frontiers and Horizons Session 2-A: Synthetic Biology and the Promise of Biofuels Jonathan Burbaum, Program Director, Department of Energy, Office of Science, ARPAE

136

Catching the fish - Constraining stellar parameters for TX Psc using spectro-interferometric observations  

E-Print Network [OSTI]

Stellar parameter determination is a challenging task when dealing with galactic giant stars. The combination of different investigation techniques has proven to be a promising approach. We analyse archive spectra obtained with the Short-Wavelength-Spectrometer (SWS) onboard of ISO, and new interferometric observations from the Very Large Telescope MID-infrared Interferometric instrument (VLTI/MIDI) of a very well studied carbon-rich giant: TX Psc. The aim of this work is to determine stellar parameters using spectroscopy and interferometry. The observations are used to constrain the model atmosphere, and eventually the stellar evolutionary model in the region where the tracks map the beginning of the carbon star sequence. Two different approaches are used to determine stellar parameters: (i) the 'classic' interferometric approach where the effective temperature is fixed by using the angular diameter in the N-band (from interferometry) and the apparent bolometric magnitude; (ii) parameters are obtained by fit...

Klotz, D; Hron, J; Aringer, B; Sacuto, S; Marigo, P; Verhoelst, T

2013-01-01T23:59:59.000Z

137

INTERFEROMETRIC VISIBILITY OF A SCINTILLATING SOURCE: STATISTICS AT THE NYQUIST LIMIT  

SciTech Connect (OSTI)

We derive the distribution of interferometric visibility for a source exhibiting strong diffractive scintillation, with particular attention to spectral resolution at or near the Nyquist limit. We also account for arbitrary temporal averaging, intrinsic variability within the averaging time, and the possibility of spatially extended source emission. We demonstrate that the interplay between scintillation and self-noise induces several remarkable features, such as a broad ''skirt'' in the visibility distribution. Our results facilitate the interpretation of interferometric observations of pulsars at meter and decimeter wavelengths.

Johnson, M. D.; Gwinn, C. R., E-mail: michaeltdh@physics.ucsb.edu, E-mail: cgwinn@physics.ucsb.edu [Department of Physics, University of California, Santa Barbara, CA 93106 (United States)

2013-05-10T23:59:59.000Z

138

In Vitro Synthetic Transcriptional Networks Jongmin Kim  

E-Print Network [OSTI]

, we engineered artificial tran- scriptional networks consisting of synthetic DNA switches, regulated

Winfree, Erik

139

Parallel optical nanolithography using nanoscale bowtie aperture array  

E-Print Network [OSTI]

-lithography. Our work employed a frequency-tripled diode-pumped solid state (DPSS) laser ( = 355 nm) and Shipley S1805 photoresist. An interference-based optical alignment system was employed to position the bowtie nano-apertures for near- field optical data storage," Jpn. J. Appl. Phys. 41(Part 1, No. 3B), 1632

Xu, Xianfan

140

Fusion of sub-aperture overlapping areas based on wavelet transformation  

Science Journals Connector (OSTI)

A new sub-aperture overlapping area fusion algorithm based on wavelet transformation is proposed to retain high-frequency components as much as the measurements in the sub-aperture...

Chen, Yiwei; Sui, Yongxin; Yang, Huaijiang

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

On eikonal distribution in the aperture of a two-mirror telescopic system  

Science Journals Connector (OSTI)

The derivation of the formula describing the eikonal distribution in the aperture of an axially symmetric two-mirror system with the source displaced from the ... of the eikonal in the aperture of a Schwarzschild

A. S. Venetskiy; V. A. Kaloshin

2012-09-01T23:59:59.000Z

142

E-Print Network 3.0 - antenna aperture fields Sample Search Results  

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

Engineering 5 Analysis of an H-shape Cross Slotted Aperture-Coupled Microstrip Patch Antenna Summary: Analysis of an H-shape Cross Slotted Aperture-Coupled Microstrip...

143

Arbitrarily-controllable programmable aperture light field cameras : design theory, and applications to image deconvolution & 3-dimensional scanning  

E-Print Network [OSTI]

This thesis describes a new class of programmable-aperture light field cameras based on an all-digital, grayscale aperture. A number of prototypes utilizing this arbitrarily-controllable programmable aperture (ACPA) light ...

Milnes, Thomas Bradford

2013-01-01T23:59:59.000Z

144

Physical Characteristics of Synthetic Rubbers  

Science Journals Connector (OSTI)

A summary of the nature and special applications of the more important types of synthetic rubbers is given. Two series of rubber and synthetic rubber stocks compounded on the basis of comparable pigmentation were selected for study. In addition to the conventional physical properties (tensile strength and elongation at rupture modulus aging etc.) a number of other mechanical properties such as dynamic rigidity hysteresis loss ``blowout resistance '' ``running temperature '' and tensile strength at elevated temperature were measured. Swelling tests in various solvents were also made. Results are plotted in the form of correlation charts in an effort to select proper methods of measurement. Some observations on comparative service tests in tires in the case of three synthetic rubbers indicate them to be satisfactory on a quality basis for use in time of emergency. The importance of care in selecting the proper physical tests and methods of analysis is emphasized in the light of the results given. It is concluded that rubbertesting techniques and interpretation must be modified in certain instances in evaluating synthetic rubber stocks.

J. N. Street; J. H. Dillon

1941-01-01T23:59:59.000Z

145

Guest Editors' Introduction: Synthetic Biology  

E-Print Network [OSTI]

(microbial production of diesel fuels from fatty acids in Escherichia coli (E. coli) and yeast+ undergraduate participants from around the world. Synthetic Biology had a global market which gene- rated $233, and genetic engineering. The buzz phrasing has not arrived yet. ``Bio Design Automation (BDA)'' or ``Genetic

Densmore, Douglas

146

Future Prospects of Synthetic Fuels  

E-Print Network [OSTI]

It is important for the future of this nation to reach the goal of demonstrated definition and quantification of the parameters which influence the ability to use this country's vast resources of coal and oil shale for production of synthetic fuels...

Fryback, M. G.

1982-01-01T23:59:59.000Z

147

A Synthetic Aperture RadarBased Climatology of Open-Cell Convection over the Northeast Pacific Ocean  

Science Journals Connector (OSTI)

This paper presents an 8-yr (19992006) climatology of the frequency of open-cell convection over the northeastern Pacific Ocean and the thermodynamic and kinematic environment associated with its development. The climatology is based on ...

Todd D. Sikora; George S. Young; Caren M. Fisher; Matthew D. Stepp

2011-03-01T23:59:59.000Z

148

Active control of passive acoustic fields: Passive synthetic apertureDoppler beamforming with data from an autonomous  

E-Print Network [OSTI]

from an autonomous vehicle Gerald L. D'Spain,a Eric Terrill, C. David Chadwell, Jerome A. Smith August 2006 The maneuverability of autonomous underwater vehicles AUVs equipped with hull-mounted arrays

Smith, Jerome A.

149

Use of synthetic aperture radar for offshore wind resource assessment and wind farm development in the UK  

E-Print Network [OSTI]

The UK has an abundant offshore wind resource with offshore wind farming set to grow rapidly over the coming years. Optimisation of energy production is of the utmost importance and accurate estimates of wind speed distributions are critical...

Cameron, Iain Dickson

2008-01-01T23:59:59.000Z

150

A COST OPTIMIZED SMALL APERTURE 2 IN 1 VLHC.  

SciTech Connect (OSTI)

Although one must recognize that parametric studies like this are not equivalent to real cost estimates: one can draw some probable conclusions. Clearly, in all cases, there is a cost optimum: at higher fields, magnet costs rise disproportionally; at low fields tunnel and other linear costs are excessive. Fields above 10 T and bellow 3 T appear to be uneconomic. Field in the 4-6 T range seem optimum. Better superconductors raise the optimum field, but by surprisingly small amounts, and offer only small savings. On the other hand, reducing the magnet apertures yield large savings. In particular, we find that a collider with SSC like energy could cost about half that of the SSC if built with 5 T magnets and apertures yielding an impedance equal to that for the proposed transmission line magnet ring. It would also be about half the cost of a ring made with those transmission line magnets.

PALMER,R.B.; PARKER,B.; FOSTER,G.W.

2001-07-01T23:59:59.000Z

151

PNP - a new class of coded aperture arrays  

SciTech Connect (OSTI)

The authors report on a new class of coded aperture arrays which has all the desirable imaging characteristics of the Uniformly Redundant Array (URA), yet is constructible in dimensions which are forbidden to that design. In addition, the new arrays (called PNP arrays, for Pseudo-Noise Product) are of self-supporting geometry, simplifying fabrication and making them ideal candidates for situations where active collimators are employed, as for example in high-energy ..gamma..-ray imaging. A unique and important feature of all PNP arrays is the ability to produce reconstructed images whose noise is uniform regardless of the original source structure. A comparison of the predicted performance of the PNP, URA, GEOMETRIC, and PINHOLE designs is presented. Coded aperture imaging, which utilizes position-sensitive detectors, was first proposed as a means for detecting x-ray and gamma sources.

Gottesman, S.R.; Schneid, E.J.

1986-02-01T23:59:59.000Z

152

Alignment and Aperture Scan at the Fermilab Booster  

SciTech Connect (OSTI)

The Fermilab Booster is currently in the process of an intensity upgrade referred to as the Proton Improvement Plan (PIP). The goal of PIP is to have the Booster provide a proton beam flux of 2 x 10{sup 17} protons/hour. This is almost double the current operation of 1.1 x 10{sup 17} protons/hour. Beam losses in the machine due to the increased flux will create larger integrated doses on aperture limiting components that will need to be mitigated. The Booster accelerates beam from 400 MeV to 8 GeV at a rep rate of 15hz and then extracts beam to the Main Injector. Several percent of the beam is lost within 3 msec after injection in the early part of acceleration. The aperture at injection energy was recently measured using corrector scans. Along with magnet survey data and aperture scan data a plan to realign the magnets in the Booster was developed and implemented in May 2012. The beam studies, analysis of the scan and alignment data, and the result of the magnet moves are presented.

Seiya, K.; Lackey, J.; Marsh, W.; Pellico, W.; Still, D.; Triplet, K.; Waller, A.; /Fermilab

2012-05-01T23:59:59.000Z

153

Scalable Genetic System Design Using Synthetic RNA Regulators  

E-Print Network [OSTI]

longest length of synthetic DNA increases exponentially (DNA sequencing, DNA synthesis, and synthetic biology. 3of DNA sequencing, DNA synthesis, and synthetic biology. (A)

Qi, Lei

2012-01-01T23:59:59.000Z

154

Synthetic biology: history, challenges and prospects  

Science Journals Connector (OSTI)

...over the last 35 years, the cloning and assembly of synthetic DNA sequences remains a largely bespoke affair. The field...and biological tools for the design and assembly of synthetic DNA-based programmes. Matsuoka et al. (2009) describe...

2009-01-01T23:59:59.000Z

155

Pioneer's name written in synthetic DNA  

Science Journals Connector (OSTI)

Craig Venter has signed his name into the sequence of the synthetic bacterial genome his lab created

2008-01-01T23:59:59.000Z

156

Synthetic LDL as targeted drug delivery vehicle  

DOE Patents [OSTI]

The present invention provides a synthetic LDL nanoparticle comprising a lipid moiety and a synthetic chimeric peptide so as to be capable of binding the LDL receptor. The synthetic LDL nanoparticle of the present invention is capable of incorporating and targeting therapeutics to cells expressing the LDL receptor for diseases associated with the expression of the LDL receptor such as central nervous system diseases. The invention further provides methods of using such synthetic LDL nanoparticles.

Forte, Trudy M. (Berkeley, CA); Nikanjam, Mina (Richmond, CA)

2012-08-28T23:59:59.000Z

157

BAYESIAN INFERENCE OF POLARIZED COSMIC MICROWAVE BACKGROUND POWER SPECTRA FROM INTERFEROMETRIC DATA  

SciTech Connect (OSTI)

Detection of B-mode polarization of the cosmic microwave background (CMB) radiation is one of the frontiers of observational cosmology. Because they are an order of magnitude fainter than E-modes, it is quite a challenge to detect B-modes. Having more manageable systematics, interferometers prove to have a substantial advantage over imagers in detecting such faint signals. Here, we present a method for Bayesian inference of power spectra and signal reconstruction from interferometric data of the CMB polarization signal by using the technique of Gibbs sampling. We demonstrate the validity of the method in the flat-sky approximation for a simulation of an interferometric observation on a finite patch with incomplete uv-plane coverage, a finite beam size, and a realistic noise model. With a computational complexity of O(n {sup 3/2}), n being the data size, Gibbs sampling provides an efficient method for analyzing upcoming cosmology observations.

Karakci, Ata; Korotkov, Andrei; Tucker, Gregory S. [Department of Physics, Brown University, 182 Hope Street, Providence, RI 02912 (United States); Sutter, P. M.; Wandelt, Benjamin D. [Department of Physics, 1110 W. Green Street, University of Illinois at Urbana-Champaign, Urbana, IL 61801 (United States); Zhang, Le; Timbie, Peter [Department of Physics, University of Wisconsin, Madison, WI 53706 (United States); Bunn, Emory F., E-mail: ata_karakci@brown.edu [Physics Department, University of Richmond, Richmond, VA 23173 (United States)

2013-01-15T23:59:59.000Z

158

Nano-Hertz Gravitational Waves Searches with Interferometric Pulsar Timing Experiments  

E-Print Network [OSTI]

We estimate the sensitivity to nano-Hertz gravitational waves of pulsar timing experiments in which two highly-stable millisecond pulsars are tracked simultaneously with two neighboring radio telescopes that are referenced to the same time-keeping subsystem (i.e. "the clock"). By taking the difference of the two time-of-arrival residual data streams we can exactly cancel the clock noise in the combined data set, thereby enhancing the sensitivity to gravitational waves. We estimate that, in the band ($10^{-9} - 10^{-8}$) Hz, this "interferometric" pulsar timing technique can potentially improve the sensitivity to gravitational radiation by almost two orders of magnitude over that of single-telescopes. Interferometric pulsar timing experiments could be performed with neighboring pairs of antennas of the forthcoming large arraying projects.

Massimo Tinto

2011-01-20T23:59:59.000Z

159

On the Theory of Diffraction by an Aperture in an Infinite Plane Screen. I  

Science Journals Connector (OSTI)

The diffraction of a scalar plane wave by an aperture in an infinite plane screen is examined theoretically. The wave function at an arbitrary point in space is expressed in terms of its values in the aperture, and constructed so as to vanish on the screen, in accordance with the assumed boundary condition. An integral equation to determine the aperture field is obtained from the continuity requirement for the normal derivative of the wave function on traversing the plane of the aperture. Utilizing the integral equation (whose solution is generally unobtainable), the amplitude of the diffracted spherical wave at large distances from the aperture is exhibited in a form which is stationary with respect to small variations (relative to the correct values) of the aperture fields arising from a pair of incident waves. This expression is independent of the scale of the aperture fields. The transmission cross section of the aperture for a plane wave is found to be simply related to the diffracted amplitude observed in the direction of incidence. The variational formulation is applied in detail for a wave incident normally on a circular aperture. By comparison with the exact results available for this problem, it appears that the use of suitable trial aperture fields in the variational formulation yields approximate, yet accurate, expressions for the diffracted amplitude and transmission cross section over a wide range of frequencies.

Harold Levine and Julian Schwinger

1948-10-15T23:59:59.000Z

160

Design of thick aperture for fine-resolution neutron penumbral imaging  

SciTech Connect (OSTI)

Compact sources of 14-MeV neutrons have been imaged with a penumbral-coded aperture at a two-point resolution of 80{mu}m. We desire to improve the penumbral-aperture microscope to obtain resolutions as fine as 10{mu}m. In penumbral-coded-aperture imaging, the resolution is ultimately limited by the sharpness of the aperture point-spread function. I present a design for a thick penumbral aperture that provides the desired sharpness over a field of view of 150{mu}m. The point-spread function of these apertures is sufficiently isoplanatic and distortion-free to allow linear reconstruction of complex source distributions. The designs is generally appropriate for similar imaging techniques, such as fine-resolution neutron or gamma-ray pinhole imaging. 5 refs., 5 figs.

Ress, D.

1989-10-19T23:59:59.000Z

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

A cost optimized small aperture 2 in 1 VLHC  

SciTech Connect (OSTI)

The costing algorithm used here was started at the time of the SSC proposal, was updated and presented at the Port Jefferson VLHC meeting in october 2000, and has been slightly modified again for this study. The method starts from a specified central field and aperture, and uses approximate formulae to design the dipole magnet cross sections. The required masses of superconductor, stabilizing copper, support stainless steel, and yoke are calculated, and the surface area of the cold mass determined. Costs per unit weight, or area/temperature, are assigned for each item and a linear cost added to cover the tunnel, supports, magnet ends, correctors, quadrupoles, survey etc. The unit costs were originally extracted from the SSC estimates, but have been inflated and modified since. They have no Intersection Point magnets, detectors, detector halls, EDIA, contingency, R and D or escalation. The assumed linear cost, including magnet ends, with the inflation factor, is 22 k$/m. If the aperture is small, as in the pipeatron, the magnets can be long, end costs reduced, and the packing factor improved. This expectation is confirmed by the recent Fermilab VLHC study. Using the total estimate from this study, the algorithm has been modified to include these effects.

R. B. Palmer; B. Parker; G. W. Foster

2002-11-19T23:59:59.000Z

162

Aperture-averaged level-crossing probability in an atmospheric communication link  

Science Journals Connector (OSTI)

The intensity statistics of light pulses in an atmospheric communication link are studied here for the case of a finite (nonpoint) detector aperture. The calculation of the statistics...

Last, I; Azar, Z; Azoulay, E; Tur, M

1988-01-01T23:59:59.000Z

163

E-Print Network 3.0 - aperture uvoir space Sample Search Results  

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

Computer Technologies and Information Sciences 52 Quantum Coherence in a Superfluid Josephson Junction Supradeep Narayana and Yuki Sato Summary: of 75 75 60 nm apertures...

164

E-Print Network 3.0 - aluminum oxide aperture Sample Search Results  

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

Search Powered by Explorit Topic List Advanced Search Sample search results for: aluminum oxide aperture Page: << < 1 2 3 4 5 > >> 1 EFFECTS OF INTERFERENCE AND OXIDATION ON...

165

E-Print Network 3.0 - advanced technology large-aperture Sample...  

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

(Advanced Photonix). These diodes were chosen for two reasons. First... pulsed terahertz emitter, a large-aperture GaAs photoconductive switch, is carried out. It is...

166

E-Print Network 3.0 - aperture tabletop soft Sample Search Results  

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

of IEEE Conference on Computer Vision and Pattern Recognition... Light Fields and Coded Aperture Refocusing, in proceedings of ACM SIGGRAPH 2007 (ACM Transactions... - denheimer,...

167

E-Print Network 3.0 - apertures ii theoretical Sample Search...  

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

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 39, NO. 2, FEBRUARY 2001 291 Image Reconstruction and Enhanced Resolution Summary: imposed by the aperture function nulls...

168

E-Print Network 3.0 - aperture synthesis observations Sample...  

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

Canarias Collection: Physics 77 Image and Depth from a Conventional Camera with a Coded Aperture Anat Levin Rob Fergus Fredo Durand William T. Freeman Summary: Image and Depth...

169

A Synthetic DNA Walker for Molecular Transport  

Science Journals Connector (OSTI)

A Synthetic DNA Walker for Molecular Transport ... The authors report the incrementally staged design, synthesis, characterization, and operation of a mol. ...

Jong-Shik Shin; Niles A. Pierce

2004-08-17T23:59:59.000Z

170

Synthetic gene oscillators and their applications  

E-Print Network [OSTI]

of 25 overlapping DNA fragments to form a complete syntheticof synthetic organisms, and bottom- up DNA construction ofsynthetic biologists attempts to design life by constructing DNA

Danino, Tal

2011-01-01T23:59:59.000Z

171

Performance evaluation of synthetically lined landfills  

SciTech Connect (OSTI)

Landfill design and performance standards for new facilities frequently require the use of geomembrane composite and double liners. Performance data from synthetically lined landfill sites have not been widely available. This report presents data obtained by monitoring three recently constructed synthetically lined landfill sites. Quantities of leachate removed by the primary and secondary collection systems from these landfills were tabulated. The data show that properly designed and constructed synthetic landfill liners provide effective containment of leachate. The environmental protection provided by synthetic liners is equivalent or superior to that of typical clay-lined facilities.

Maule, J. [Champion International Corp., Norway, MI (United States); Lowe, R.K. [STS Consultants Ltd., Green Bay, WI (United States); McCulloch, J.L. [Cross Pointe Paper Co., Park Falls, WI (United States)

1993-12-01T23:59:59.000Z

172

An interferometric signal demodulation scheme using zero crossings and an asynchronous clock  

E-Print Network [OSTI]

to recover P, . In many systems such as the fiber-optic gyroscope, we desire to measure Tz ? Tr to a resolution of the level of zero crossing jitter which is typically about lns. With this resolution, we would be able to measure small magnitude signals... which would cause changes in the zero crossings of the interferometric signal much less than lns. Clearly, unless the synchronous clock pulse period is reduced to around lns, this is not possible. An alternative is to use an asynchronous clock scheme...

McCain, Dennis M.

2012-06-07T23:59:59.000Z

173

Preparation of synthetic hydrocarbon lubricants  

SciTech Connect (OSTI)

A process is described for preparing synthetic lubricating materials which process comprises: (a) reacting (i) at least a portion of a reaction product of the liquid phase oligomerization of propylene, butylene or mixtures thereof containing a C/sub 6/ olefin component, (ii) a linear olefin reactant having an average carbon number ranging from about 10 to about 18 in the presence of a catalyst, (b) separating from the reaction mixture of (a) hydrocarbons which distill at a temperature above about 660/sup 0/ F. (316/sup 0/ C.), and (c) hydrogenating the reaction product of (b) by contact with hydrogen with or without a catalyst at a temperature ranging from about 25/sup 0/ C. to about 300/sup 0/ C.

Johnson, T.H.

1986-10-07T23:59:59.000Z

174

The Balloon-borne Large Aperture Sub-millimetre Telescope  

E-Print Network [OSTI]

The Balloon-borne Large-Aperture Sub-millimetre Telescope (BLAST) will operate on a Long Duration Balloon platform with large format bolometer arrays at 250, 350 and 500 microns, initially using a 2m mirror, with plans to increase to 2.5m. BLAST is a collaboration between scientists in the USA, Canada, UK, Italy and Mexico. Funding has been approved and it is now in its building phase. The test flight is scheduled for 2002, with the first long duration flight the following year. The scientific goals are to learn about the nature of distant extragalactic star forming galaxies and cold pre-stellar sources by making deep maps both at high and low galactic latitudes. BLAST will be useful for planning Herschel key projects which use SPIRE.

Douglas Scott; the BLAST Team

2001-04-03T23:59:59.000Z

175

Numerical aperture influence on 3-D multi-layer optical data storage systems , Edwin P. Walkera  

E-Print Network [OSTI]

Numerical aperture influence on 3-D multi-layer optical data storage systems Yi Zhanga* , Edwin P storage system is analyzed. Keywords: NA, multi-layer data storage, two-photon recording, capacity) 550-0596, Fax: (858) 550-0917 #12;Numerical aperture influence on 3-D multi-layer optical data storage

Esener, Sadik C.

176

Analysis of an H-shape Cross Slotted Aperture-Coupled Microstrip Patch Antenna  

E-Print Network [OSTI]

Analysis of an H-shape Cross Slotted Aperture-Coupled Microstrip Patch Antenna Chae-Hyun Jung #1 circuit model for an H-shape cross slotted aperture-coupled microstrip patch antenna (ACMPA) are presented to design the antenna. The ACMPA consists of three conductor layers such as patch, ground plane, and feed

Myung, Noh-Hoon

177

Hydraulic transmissivity and heat exchange efficiency of open fractures: a model based on lowpass filtered apertures  

E-Print Network [OSTI]

Natural open joints in rocks commonly present multi-scale self-affine apertures. This geometrical complexity affects fluid transport and heat exchange between the flow- ing fluid and the surrounding rock. In particular, long range correlations of self-affine apertures induce strong channeling of the flow which influences both mass and heat advection. A key question is to find a geometrical model of the complex aperture that describes at best the macroscopic properties (hydraulic conductivity, heat exchange) with the smallest number of parameters. Solving numerically the Stokes and heat equa- tions with a lubrication approximation, we show that a low pass filtering of the aperture geometry provides efficient estimates of the effective hydraulic and thermal properties (apertures). A detailed study of the influence of the bandwidth of the lowpass filtering on these transport properties is also performed. For instance, keeping the information of amplitude only of the largest Fourier length scales allows us to rea...

Neuville, Amlie; Schmittbuhl, Jean; 10.1111/j.1365-246X.2011.05126.x

2011-01-01T23:59:59.000Z

178

Fracture of synthetic diamond M. D. Droty  

E-Print Network [OSTI]

Fracture of synthetic diamond M. D. Droty Ctystallume, 3506 Bassett Street, Santa Clara, California 1995) The fracture behavior of synthetic diamond has been investigated using indentation methods and by the tensile testing of pre-notched fracture-mechanics type samples. Specifically, the fracture toughness

Ritchie, Robert

179

InSAR observations of aseismic slip associated with an earthquake swarm in the Columbia River flood basalts  

E-Print Network [OSTI]

's Hanford Site. Data from the seismic network along with interferometric synthetic aperture radar (In detected nearly 40 years ago in and around the Hanford Nuclear Site located in the eastern YFB [Pitt, 1971; Malone et al., 1975] (Figure 1). The Wooded Island area of Hanford has been a source of persistent

180

Sensors 2008, 8, 3903-3931; DOI: 10.3390/s8063903 OPEN ACCESS  

E-Print Network [OSTI]

Sensors 2008, 8, 3903-3931; DOI: 10.3390/s8063903 OPEN ACCESS sensors ISSN 1424-8220 www.mdpi.org/sensors to readers with a background in SAR. Keywords: Microscopy, Interferometric, Synthetic Aperture, Radar, Optical Coherence To- mography. #12;Sensors 2008, 8 3904 1. Introduction Traditional sensing modalities

Bhargava, Rohit

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

Interferometric adaptive optics for high power laser pointing, wave-front control and phasing  

SciTech Connect (OSTI)

Implementing the capability to perform fast ignition experiments, as well as, radiography experiments on the National Ignition Facility (NIF) places stringent requirements on the control of each of the beam's pointing and overall wavefront quality. One quad of the NIF beams, 4 beam pairs, will be utilized for these experiments and hydrodynamic and particle-in-cell simulations indicate that for the fast ignition experiments, these beams will be required to deliver 50% (4.0 kJ) of their total energy (7.96 kJ) within a 40 {micro}m diameter spot at the end of a fast ignition cone target. This requirement implies a stringent pointing and overall phase conjugation error budget on the adaptive optics system used to correct these beam lines. The overall encircled energy requirement is more readily met by phasing of the beams in pairs but still requires high Strehl ratios, Sr, and rms tip/tilt errors of approximately one {micro}rad. To accomplish this task we have designed an interferometric adaptive optics system capable of beam pointing, high Strehl ratio and beam phasing with a single pixilated MEMS deformable mirror and interferometric wave-front sensor. We present the design of a testbed used to evaluate the performance of this wave-front sensor below along with simulations of its expected performance level.

Baker, K L; Stappaerts, E A; Homoelle, D C; Henesian, M A; Bliss, E S; Siders, C W; Barty, C J

2009-01-21T23:59:59.000Z

182

Spotlight SAR interferometry for terrain elevation mapping and interferometric change detection  

SciTech Connect (OSTI)

In this report, we employ an approach quite different from any previous work; we show that a new methodology leads to a simpler and clearer understanding of the fundamental principles of SAR interferometry. This methodology also allows implementation of an important collection mode that has not been demonstrated to date. Specifically, we introduce the following six new concepts for the processing of interferometric SAR (INSAR) data: (1) processing using spotlight mode SAR imaging (allowing ultra-high resolution), as opposed to conventional strip-mapping techniques; (2) derivation of the collection geometry constraints required to avoid decorrelation effects in two-pass INSAR; (3) derivation of maximum likelihood estimators for phase difference and the change parameter employed in interferometric change detection (ICD); (4) processing for the two-pass case wherein the platform ground tracks make a large crossing angle; (5) a robust least-squares method for two-dimensional phase unwrapping formulated as a solution to Poisson`s equation, instead of using traditional path-following techniques; and (6) the existence of a simple linear scale factor that relates phase differences between two SAR images to terrain height. We show both theoretical analysis, as well as numerous examples that employ real SAR collections to demonstrate the innovations listed above.

Eichel, P.H.; Ghiglia, D.C.; Jakowatz, C.V. Jr. [and others

1996-02-01T23:59:59.000Z

183

Reconstruction of source location in a network of gravitational wave interferometric detectors  

SciTech Connect (OSTI)

This paper deals with the reconstruction of the direction of a gravitational wave source using the detection made by a network of interferometric detectors, mainly the LIGO and Virgo detectors. We suppose that an event has been seen in coincidence using a filter applied on the three detector data streams. Using the arrival time (and its associated error) of the gravitational signal in each detector, the direction of the source in the sky is computed using a {chi}{sup 2} minimization technique. For reasonably large signals (SNR>4.5 in all detectors), the mean angular error between the real location and the reconstructed one is about 1 deg. . We also investigate the effect of the network geometry assuming the same angular response for all interferometric detectors. It appears that the reconstruction quality is not uniform over the sky and is degraded when the source approaches the plane defined by the three detectors. Adding at least one other detector to the LIGO-Virgo network reduces the blind regions and in the case of 6 detectors, a precision less than 1 deg. on the source direction can be reached for 99% of the sky.

Cavalier, Fabien; Barsuglia, Matteo; Bizouard, Marie-Anne; Brisson, Violette; Clapson, Andre-Claude; Davier, Michel; Hello, Patrice; Kreckelbergh, Stephane; Leroy, Nicolas; Varvella, Monica [Laboratoire de l'Accelerateur Lineaire, IN2P3-CNRS et Universite Paris-Sud 11, Centre Scientifique d'Orsay, B.P. 34, 91898 Orsay Cedex (France)

2006-10-15T23:59:59.000Z

184

Definition: InSAR | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: InSAR Jump to: navigation, search Dictionary.png InSAR Interferometric Synthetic Aperture Radar (InSAR) is a remote sensing technique that can be used to accurately measure ground displacement.[1] View on Wikipedia Wikipedia Definition Interferometric synthetic aperture radar, abbreviated InSAR or IfSAR, is a radar technique used in geodesy and remote sensing. This geodetic method uses two or more synthetic aperture radar (SAR) images to generate maps of surface deformation or digital elevation, using differences in the phase of the waves returning to the satellite or aircraft. The technique can potentially measure centimetre-scale changes in deformation over spans of days to years. It has applications for

185

Single Molecule and Synthetic Biology Studies of Transcription  

E-Print Network [OSTI]

GenScript returned the synthetic DNA cloned into the EcoRIis pre-formed using synthetic DNA and RNA oligonucleotides.synthetic oligonucleotides, including those used as PCR primers, were synthesized by Integrated DNA

Zamft, Bradley Michael

2011-01-01T23:59:59.000Z

186

Synthetic Promoters Functional in Francisella novicida and Escherichia coli  

Science Journals Connector (OSTI)

...facultative intracellular pathogen. Synthetic DNA fragments consisting of the tetracycline...controllable promoters from a library of synthetic DNA molecules. We show that the strongest...flanking BamHI restriction sites) synthetic DNA fragments with a nearly central...

Ralph L. McWhinnie; Francis E. Nano

2013-10-18T23:59:59.000Z

187

Building a metal-responsive promoter with synthetic regulatory elements.  

Science Journals Connector (OSTI)

...function of MREs, we inserted a synthetic DNA fragment containing the sequence...function of MREs, we inserted a synthetic DNA fragment containing the sequence...function of MREs, we inserted a synthetic DNA fragment containing the sequence...

P F Searle; G W Stuart; R D Palmiter

1985-06-01T23:59:59.000Z

188

Abstract The rapidly emerging field of synthetic biology  

E-Print Network [OSTI]

Abstract The rapidly emerging field of synthetic biology originated, as synthetic biology has expanded into mammalian systems, it is increasingly more. Biomaterials will play an important role in advancing synthetic biology

Reisslein, Martin

189

Single Molecule and Synthetic Biology Studies of Transcription  

E-Print Network [OSTI]

GenScript returned the synthetic DNA cloned into the EcoRIis pre-formed using synthetic DNA and RNA oligonucleotides.

Zamft, Bradley Michael

2011-01-01T23:59:59.000Z

190

Molecular Interactions of Plutonium(VI) with SyntheticManganese...  

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

Plutonium(VI) with Synthetic Manganese-Substituted Goethite. Abstract: Plutonium(VI) sorption on the surface of well-characterized synthetic manganese-substituted goethite...

191

Sorption-Enhanced Synthetic Natural Gas (SNG) Production from...  

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

Sorption-Enhanced Synthetic Natural Gas (SNG) Production from Syngas: A Novel Process Combining CO Methanation, Water-Gas Shift, Sorption-Enhanced Synthetic Natural Gas (SNG)...

192

Constraints on flow regimes in wide-aperture fractures  

SciTech Connect (OSTI)

In recent years, significant advances have been made in our understanding of the complex flow processes in individual fractures, aided by flow visualization experiments and conceptual modeling efforts. These advances have led to the recognition of several flow regimes in individual fractures subjected to different initial and boundary conditions. Of these, the most important regimes are film flow, rivulet flow, and sliding of droplets. The existence of such significantly dissimilar flow regimes has been a major hindrance in the development of self-consistent conceptual models of flow for single fractures that encompass all the flow regimes. The objective of this study is to delineate the existence of the different flow regimes in individual fractures. For steady-state flow conditions, we developed physical constraints on the different flow regimes that satisfy minimum energy configurations, which enabled us to segregate the wide range of fracture transmissivity (volumetric flow rate per fracture width) into several flow regimes. These are, in increasing order of flow rate, flow of adsorbed films, flow of sliding drops, rivulet flow, stable film flow, and unstable (turbulent) film flow. The scope of this study is limited to wide-aperture fractures with the flow on the opposing sides of fracture being independent.

Ghezzehei, Teamrat A.

2004-02-28T23:59:59.000Z

193

Design considerations for a large aperture high field superconducting dipole  

SciTech Connect (OSTI)

The final phase of the Fermilab upgrade proposal calls for a new ring of superconducting magnets to be placed in the existing Main Accelerator tunnel. The goal of this design study is to specify a high field dipole (HFD) that is capable of supporting fixed target operation (ramping, resonant extraction) at a field of 6.6T (1.5 Tev) and colliding beam physics at 8.0T (1.8 Tev). The magnetic field quality at high field is set by the large amplitude orbits associated with resonant extraction. The field quality must therefore be at least as good as the existing Tevatron magnets which fulfill these criteria. The high fields and large aperture of this magnet result in large forces on the coil and collar assemblies. Therefore, the cold mass design must be able to sustain these forces while providing sufficient cooling to the coils during 4.2 K fixed target operation, and a minimum heat load during 1.8 K collider operation. The design work is still in progress but a cosine-theta, cold-iron dipole with a 70mm inner diameter coil has been tentatively adopted. This report presents details on the conductor and cable parameters, coil cross-section, projected manufacturing tolerances, iron yoke design, and cold mass assembly. 4 refs., 5 figs., 1 tab.

Harfoush, F.; Ankenbrandt, C.; Harrison, M.; Kerby, J.; Koepke, K.; Mantsch, P.; Nicol, T.; Riddiford, A.; Theilacker, J.

1989-03-01T23:59:59.000Z

194

The Balloon-borne Large Aperture Submillimeter Telescope: BLAST  

Science Journals Connector (OSTI)

The Balloon-borne Large Aperture Submillimeter Telescope (BLAST) is a suborbital surveying experiment designed to study the evolutionary history and processes of star formation in local galaxies (including the Milky Way) and galaxies at cosmological distances. The BLAST continuum camera, which consists of 270 detectors distributed between three arrays, observes simultaneously in broadband (30%) spectral windows at 250, 350, and 500 ?m. The optical design is based on a 2 m diameter telescope, providing a diffraction-limited resolution of 30 -->'' at 250 ?m. The gondola pointing system enables raster mapping of arbitrary geometry, with a repeatable positional accuracy of ~30 -->''; postflight pointing reconstruction to 5 -->'' rms is achieved. The onboard telescope control software permits autonomous execution of a preselected set of maps, with the option of manual override. In this paper we describe the primary characteristics and measured in-flight performance of BLAST. BLAST performed a test flight in 2003 and has since made two scientifically productive long-duration balloon flights: a 100 hr flight from ESRANGE (Kiruna), Sweden to Victoria Island, northern Canada in 2005 June; and a 250 hr, circumpolar flight from McMurdo Station, Antarctica, in 2006 December.

E. Pascale; P. A. R. Ade; J. J. Bock; E. L. Chapin; J. Chung; M. J. Devlin; S Dicker; M. Griffin; J. O. Gundersen; M. Halpern; P. C. Hargrave; D. H. Hughes; J. Klein; C. J. MacTavish; G. Marsden; P. G. Martin; T. G. Martin; P. Mauskopf; C. B. Netterfield; L. Olmi; G. Patanchon; M. Rex; D. Scott; C. Semisch; N. Thomas; M. D. P. Truch; C. Tucker; G. S. Tucker; M. P. Viero; D. V. Wiebe

2008-01-01T23:59:59.000Z

195

The assessment of DNA-synthetic activity  

Science Journals Connector (OSTI)

A method is described by which a numerical value can be assigned to the amount of DNA-synthesis shown graphically by population-histograms obtained ... index appeared to give a reasonable measure of DNA-synthetic

L. A. Coulton; B. Henderson; J. Chayen

1981-01-01T23:59:59.000Z

196

Recognition of DNA by Synthetic Antibodies  

Science Journals Connector (OSTI)

Recognition of DNA by Synthetic Antibodies ... The recombinant anti-ssDNA Fab, DNA-1, and 16 heavy chain complementarity determining region 3 (HCDR3) mutant variants were selected for thermodynamic characterization of ssDNA binding. ...

Shana M. Barbas; Peter Ghazal; Carlos F. Barbas III; Dennis R. Burton

1994-03-01T23:59:59.000Z

197

DNA interaction with synthetic polymers in solution  

Science Journals Connector (OSTI)

The complexes in which a DNA molecule is compact and protected from the ... lipids, inactivated viral particles, polymeric micelles and synthetic polycations are used [1223...]. The latter have important advanta...

Nina Kasyanenko; Daria Afanasieva; Boris Dribinsky; Dmitry Mukhin

2007-08-01T23:59:59.000Z

198

Synthetic Biology Moving into the Clinic  

Science Journals Connector (OSTI)

...secrete key molecules for potential disease treatment, including insulinotropic...murine interleukin-2 in response to xylan . J. Appl. Microbiol. 98 , 1191...of synthetic biology therapies for the treatment of infectious diseases and cancer, as...

Warren C. Ruder; Ting Lu; James J. Collins

2011-09-02T23:59:59.000Z

199

Fuzzy Synthetic Evaluation of Gas Station Safety  

Science Journals Connector (OSTI)

Based on the comprehensive analysis of hazard factors and evaluation indexes in gas stations, gas station safety is assessed in a fuzzy synthetic ... comprehensive evaluation, the specific safety level of gas stations

Xiaohua Hao; Xiao Feng

2010-01-01T23:59:59.000Z

200

Macroporous nanowire nanoelectronic scaffolds for synthetic tissues  

E-Print Network [OSTI]

The development of three-dimensional (3D) synthetic biomaterials as structural and bioactive scaffolds is central to fields ranging from cellular biophysics to regenerative medicine. As of yet, these scaffolds cannot ...

Tian, Bozhi

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

Foundational platform for mammalian synthetic biology  

E-Print Network [OSTI]

The emergent field of synthetic biology is different from many other biological engineering efforts, in that its roots, design principles, and forward engineering perspective have been adopted from electrical engineering ...

Davidsohn, Noah (Noah Justin)

2013-01-01T23:59:59.000Z

202

Interferometric phase detection at x-ray energies via Fano resonance control  

E-Print Network [OSTI]

Modern x-ray light sources promise access to structure and dynamics of matter in largely unexplored spectral regions. However, the desired information is encoded in the light intensity and phase, whereas detectors register only the intensity. This phase problem is ubiquitous in crystallography and imaging, and impedes the exploration of quantum effects at x-ray energies. Here, we demonstrate phase-sensitive measurements characterizing the quantum state of a nuclear two-level system at hard x-ray energies. The nuclei are initially prepared in a superposition state. Subsequently, the relative phase of this superposition is interferometrically reconstructed from the emitted x-rays. Our results form a first step towards x-ray quantum state tomography, and provide new avenues for structure determination and precision metrology via x-ray Fano interference.

K. P. Heeg; C. Ott; D. Schumacher; H. -C. Wille; R. Rhlsberger; T. Pfeifer; J. Evers

2014-11-06T23:59:59.000Z

203

E-Print Network 3.0 - apertures Sample Search Results  

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

Sato Summary: in which we take an array of nanoscale apertures that form a superfluid 4He Josephson junction and apply... quantum phase gradients directly along the array. We...

204

E-Print Network 3.0 - aperture grb observatory Sample Search...  

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

Collection: Mathematics 8 arXiv:astro-ph9711245v120Nov1997 To be published in "Gamma-Ray Bursts, 4th Huntsville Symposium", 1998, ed. Summary: aperture to the APT, but has a...

205

Video rate spectral imaging using a coded aperture snapshot spectral imager  

Science Journals Connector (OSTI)

We have previously reported on coded aperture snapshot spectral imagers (CASSI) that can capture a full frame spectral image in a snapshot. Here we describe the use of CASSI for...

Wagadarikar, Ashwin A; Pitsianis, Nikos P; Sun, Xiaobai; Brady, David J

2009-01-01T23:59:59.000Z

206

E-Print Network 3.0 - aperture radar intensity Sample Search...  

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

radar must have a large power-aperture product. Second, in order to obtain accurate wind velocities... arrays. The early radars could be pointed in only a few, Fig. 1. RHI...

207

The Balloon-borne Large Aperture Submillimeter Telescope and Its Rebirth as a Polarimeter.  

E-Print Network [OSTI]

??The Balloon-borne Large Aperture Submillimeter Telescope (BLAST) is a 1.8 meter Cassegrain telescope that operates in three bands (250, 350, and 500 ?m), each with (more)

Thomas, Nicholas E

2011-01-01T23:59:59.000Z

208

E-Print Network 3.0 - aperture based imrt Sample Search Results  

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

the values of EUD were calculated. (3) Simulation of IMRT... is the direct aperture optimization (DAO) method. The IMRT plans generated by DAO can be delivered within 10 min......

209

E-Print Network 3.0 - aperture radar 3d Sample Search Results  

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

would be inefficient to use the large aperture radar... PTGTGR 2 (dB) RadarFunction (dB) Weather Target Table 3. ... Source: Reuter, Martin - NMR Athinoula A. Martinos Center,...

210

Meta-DNA: synthetic biology via DNA nanostructures and  

E-Print Network [OSTI]

Meta-DNA: synthetic biology via DNA nanostructures and hybridization reactions Harish Chandran1 strands and may be modified to allow for mutations. Keywords: DNA self-assembly; synthetic biology; DNA nanostructures 1. INTRODUCTION 1.1. Synthetic biology using DNA nanosystems A major goal of synthetic biology

Reif, John H.

211

Synthetic Datasets Rong Huang, Rada Chirkova, Yahya Fathi  

E-Print Network [OSTI]

Synthetic Datasets Rong Huang, Rada Chirkova, Yahya Fathi 1 Introduction Datasets may be generated will define symmetric synthetic dataset and two types of non-symmetric synthetic datasets that has some introduce symmetric synthetic dataset, its structure and the properties of the associated views. In Section

Young, R. Michael

212

LCLS X-ray mirror measurements using a large aperture visible light interferometer  

SciTech Connect (OSTI)

Synchrotron or FEL X-ray mirrors are required to deliver an X-ray beam from its source to an experiment location, without contributing significantly to wave front distortion. Accurate mirror figure measurements are required prior to installation to meet this intent. This paper describes how a 300 mm aperture phasing interferometer was calibrated to <1 nm absolute accuracy and used to mount and measure 450 mm long flats for the Linear Coherent Light Source (LCLS) at Stanford Linear Accelerator Center. Measuring focus mirrors with an interferometer requires additional calibration, because high fringe density introduces systematic errors from the interferometer's imaging optics. This paper describes how these errors can be measured and corrected. The calibration approaches described here apply equally well to interferometers larger than 300 mm aperture, which are becoming more common in optics laboratories. The objective of this effort was to install LCLS flats with < 10 nm of spherical curvature, and < 2 nm rms a-sphere. The objective was met by measuring the mirrors after fabrication, coating and mounting, using a 300 mm aperture phasing interferometer calibrated to an accuracy < 1 nm. The key to calibrating the interferometer accurately was to sample the error using independent geometries that are available. The results of those measurements helped identify and reduce calibration error sources. The approach used to measure flats applies equally well to focus mirrors, provided an additional calibration is performed to measure the error introduced by fringe density. This calibration has been performed on the 300 mm aperture interferometer, and the measurement correction was evaluated for a typical focus mirror. The 300 mm aperture limitation requires stitching figure measurements together for many X-ray mirrors of interest, introducing another possible error source. Stitching is eliminated by applying the calibrations described above to larger aperture instruments. The authors are presently extending this work to a 600 mm instrument. Instruments with 900 mm aperture are now becoming available, which would accommodate the largest mirrors of interest.

McCarville, T; Soufli, R; Pivovaroff, M

2011-03-02T23:59:59.000Z

213

Synthetic heparin-binding factor analogs  

DOE Patents [OSTI]

The invention provides synthetic heparin-binding growth factor analogs having at least one peptide chain, and preferably two peptide chains branched from a dipeptide branch moiety composed of two trifunctional amino acid residues, which peptide chain or chains bind a heparin-binding growth factor receptor and are covalently bound to a non-signaling peptide that includes a heparin-binding domain, preferably by a linker, which may be a hydrophobic linker. The synthetic heparin-binding growth factor analogs are useful as pharmaceutical agents, soluble biologics or as surface coatings for medical devices.

Pena, Louis A. (Poquott, NY); Zamora, Paul O. (Gaithersburg, MD); Lin, Xinhua (Plainview, NY); Glass, John D. (Shoreham, NY)

2010-04-20T23:59:59.000Z

214

Nanoscale Molecular Transport by Synthetic DNA Machines  

E-Print Network [OSTI]

Nanoscale Molecular Transport by Synthetic DNA Machines Jong-Shik Shin1 and Niles A. Pierce1,2 1 a processive bipedal DNA walker. Powered by externally controlled DNA fuel strands, the walker locomotes with a 5 nm stride by advancing the trailing foot to the lead at each step. On a periodic DNA track

Pierce, Niles A.

215

Synthetic fuels, carbon dioxide and climate  

Science Journals Connector (OSTI)

The observed increase in atmospheric carbon dioxide (CO2) has been attributed to the use of fossil fuels. There is concern that the generation and use of synthetic fuels derived from oil shale and coal will accelerate the increase of CO2.

Alex R. Sapre; John R. Hummel; Ruth A. Reck

1982-01-01T23:59:59.000Z

216

1 Synthetic Texturing 1.1 Introduction  

E-Print Network [OSTI]

1 Synthetic Texturing 1.1 Introduction This dissertation describes improved methods for computer of this, the top of Figure 1.1 shows a horse model with a white surface and the bottom shows this same-hocformulasforlightreflection Figure 1.1: Stripe texture created using reaction-diffusion. Top is an untextured horse and the bottom

Turk, Greg

217

Operating the LCLS Gas Attenuator and Gas Detector System with Apertures of 6mm Diameter  

SciTech Connect (OSTI)

The possibility of increasing the apertures of the LCLS gas attenuator/gas detector system is considered. It is shown that increase of the apertures from 3 to 6 mm, together with 4-fold reduction of the operation pressure does not adversely affect the vacuum conditions upstream or downstream. No change of the pump speed and the lengths of the differential pumping cells is required. One minor modification is the use of 1.5 cm long tubular apertures in the end cells of the differential pumping system. Reduction of the pressure does not affect performance of the gas attenuator/gas detector system at the FEL energies below, roughly, 2 keV. Some minor performance degradation occurs at higher energies.

Ryutov, D.D.; Bionta, R.M.; Hau-Riege, S.P.; Kishiyama, K.I.; Roeben, M.D.; Shen, S.; /LLNL, Livermore; Stefan, P.M.; /SLAC; ,

2010-11-17T23:59:59.000Z

218

The investigation of fracture aperture effect on shale gas transport using discrete fracture model  

Science Journals Connector (OSTI)

Abstract Discrete fracture model (DFM) numerical simulation is used to investigate the shale gas transports in fractured porous media in this paper. A new seepage flow mathematic model, in which flow in fracture meets Cubic law and matrix meets non-Darcy law, is adopted and fracture aperture effect on the transport behavior is simulated by solving the nonlinear partial differential equations using finite element analysis (FEA). In this DFM, fluid flows into wellbore which is surrounded by impermeable rock matrix is merely through fractures that connect to it. The model is used to simulate a random generated fractures network to study the flow and transport characteristics in fractured porous media (FPM). Several cases with different fracture aperture in same natural fractured model are given. The preliminary simulation results show that both the natural and hydraulic fracture aperture have a significant impact on shale gas migration and production.

Lidong Mi; Hanqiao Jiang; Junjian Li; Tao Li; Ye Tian

2014-01-01T23:59:59.000Z

219

E-Print Network 3.0 - aperture radar interferometry Sample Search...  

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

and Information Sciences 15 Monitoring and characterizing natural hazards with satellite InSAR imagery *, Jixian Zhangb Summary: -1570. Lu, Z., et al., 2000c. Synthetic...

220

Effect of beam limiting aperture and collector potential on multi-element focused ion beams  

SciTech Connect (OSTI)

A compact microwave driven plasma based multi-element focused ion beam system has been developed. In the present work, the effect of reduced beam limiter (BL) aperture on the focused ion beam parameters, such as current and spot size, and a method of controlling beam energy independently by introducing a biased collector at focal point (FP) are investigated. It is found that the location of FP does not change due to the reduction of BL aperture. The location of FP and beam size are found to be weakly dependent on the collector potential in the range from -8 kV to -18 kV.

Paul, Samit; Chowdhury, Abhishek; Bhattacharjee, Sudeep [Department of Physics, Indian Institute of Technology, Kanpur, Uttar Pradesh (India)

2012-02-15T23:59:59.000Z

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

A typical Ztrack'' long-term tracking result for the SSC aperture study  

SciTech Connect (OSTI)

A large amount of supercomputer CPU time has been used for tracking particles in the Superconducting Super Collider (SSC) using a vectorized, multi-tasked post-Teapot tracking program called Ztrack.'' Typically, hundreds of particles with appropriate initial displacements (relative to the closed orbits) are tracked for a hundred thousand turns. One then simply makes a survival plot (turn at which particle is lost versus initial displacements) to determine the dynamic aperture. Occasionally, particles are tracked to a million turns for very selective cases. These numerical studies aid in determining the best aperture for the SSC. 6 refs., 1 fig., 1 tab.

Yan, Y.; Bourianoff, G. (Superconducting Super Collider Lab., Dallas, TX (USA)); Schachinger, L. (Lawrence Berkeley Lab., CA (USA))

1990-12-01T23:59:59.000Z

222

Feedback control of flow separation using synthetic jets  

E-Print Network [OSTI]

The primary goal of this research is to assess the effect of synthetic jets on flow separation and provide a feedback control strategy for flow separation using synthetic jets. The feedback control synthesis is conducted based upon CFD simulation...

Kim, Kihwan

2006-04-12T23:59:59.000Z

223

Regulation of Gene Expression by Synthetic DNA-Binding Ligands  

E-Print Network [OSTI]

Regulation of Gene Expression by Synthetic DNA-Binding Ligands Peter B. Dervan ( ) · Adam T. Poulin

Dervan, Peter B.

224

Systems Biology 204: Biomolecular Engineering and Synthetic Biology  

E-Print Network [OSTI]

Shih Biomolecular primitives Mon. Sep. 12 Willian Shih DNA origami Wed. Sep. 14 David Zhang SyntheticSystems Biology 204: Biomolecular Engineering and Synthetic Biology SyllabusSynopsis Fall 2011-based synthetic molecular and cellular machinery and systems. Students are mentored to produce substantial term

Bulyk, Martha L.

225

Synthetic logs generator for fraud detection in mobile transfer services  

E-Print Network [OSTI]

Synthetic logs generator for fraud detection in mobile transfer services C. Gaber12 , B. Hemery2.gaber,mohammed.achemlal}@orange.com Abstract. This article presents a simulator which generates synthetic data for fraud detection. It models fraudsters and legitimate users. Keywords: synthetic data, simulation, fraud detection Mobile payments become

Boyer, Edmond

226

Department of Mechanical Engineering Spring 2012 Synthetic Cable Termination  

E-Print Network [OSTI]

PENNSTATE Department of Mechanical Engineering Spring 2012 Synthetic Cable Termination Overview NAVAIR is attempting to replace their existing metallic purchase cable with a new, synthetic cable. The synthetic cable is currently not able to be tensile tested because there is no way for the ends

Demirel, Melik C.

227

Radiance: Synthetic Imaging System | Open Energy Information  

Open Energy Info (EERE)

Radiance: Synthetic Imaging System Radiance: Synthetic Imaging System Jump to: navigation, search Tool Summary Name: RADIANCE Agency/Company /Organization: Lawrence Berkeley National Laboratory Sector: Energy Focus Area: Buildings Resource Type: Software/modeling tools User Interface: Desktop Application Website: radsite.lbl.gov/radiance/ Cost: Free References: Radiance[1] Logo: RADIANCE RADIANCE is a highly accurate ray-tracing software system for UNIX computers that is licensed at no cost in source form. Radiance was developed with primary support from the U.S. Department Of Energy and additional support from the Swiss Federal Government. Radiance is a suite of programs for the analysis and visualization of lighting in design. Input files specify the scene geometry, materials, luminaires,time, date

228

Seismic gravity-gradient noise in interferometric gravitational-wave detectors  

E-Print Network [OSTI]

When ambient seismic waves pass near an interferometric gravitational-wave detector, they induce density perturbations in the earth which produce fluctuating gravitational forces on the interferometer's test masses. These forces mimic a stochastic background of gravitational waves and thus constitute noise. We compute this noise using the theory of multimode Rayleigh and Love waves propagating in a layered medium that approximates the geological strata at the LIGO sites. We characterize the noise by a transfer function $T(f) \\equiv \\tilde x(f)/\\tilde W(f)$ from the spectrum of direction averaged ground motion $\\tilde W(f)$ to the spectrum of test mass motion $\\tilde x(f) = L\\tilde h(f)$ (where $L$ is the length of the interferometer's arms, and $\\tilde h(f)$ is the spectrum of gravitational-wave noise). This paper's primary foci are (i) a study of how $T(f)$ depends on the various seismic modes; (ii) an attempt to estimate which modes are excited at the LIGO sites at quiet and noisy times; and (iii) a corresponding estimate of the seismic gravity-gradient noise level. At quiet times the noise is below the benchmark noise level of ``advanced LIGO interferometers'' (although not by much near 10 Hz); it may significantly exceed this level at noisy times. The lower edge of our quiet-time noise is a limit beyond which there is little gain from further improvements in vibration isolation and thermal noise, unless one also reduces seismic gravity-gradient noise. Two methods of reduction are discussed: monitoring the earth's density perturbations, computing their gravitational forces, and correcting the data for those forces; and constructing narrow moats around the interferometers' test masses to shield out the fundamental-mode Rayleigh waves, which we suspect dominate at quiet times.

Scott A. Hughes; Kip S. Thorne

1998-06-03T23:59:59.000Z

229

SYSTEMATIC EFFECTS IN INTERFEROMETRIC OBSERVATIONS OF THE COSMIC MICROWAVE BACKGROUND POLARIZATION  

SciTech Connect (OSTI)

The detection of the primordial B-mode spectrum of the polarized cosmic microwave background (CMB) signal may provide a probe of inflation. However, observation of such a faint signal requires excellent control of systematic errors. Interferometry proves to be a promising approach for overcoming such a challenge. In this paper we present a complete simulation pipeline of interferometric observations of CMB polarization, including systematic errors. We employ two different methods for obtaining the power spectra from mock data produced by simulated observations: the maximum likelihood method and the method of Gibbs sampling. We show that the results from both methods are consistent with each other as well as, within a factor of six, with analytical estimates. Several categories of systematic errors are considered: instrumental errors, consisting of antenna gain and antenna coupling errors; and beam errors, consisting of antenna pointing errors, beam cross-polarization, and beam shape (and size) errors. In order to recover the tensor-to-scalar ratio, r, within a 10% tolerance level, which ensures the experiment is sensitive enough to detect the B-signal at r = 0.01 in the multipole range 28 < l < 384, we find that, for a QUBIC-like experiment, Gaussian-distributed systematic errors must be controlled with precisions of |g{sub rms}| = 0.1 for antenna gain, |{epsilon}{sub rms}| = 5 Multiplication-Sign 10{sup -4} for antenna coupling, {delta}{sub rms} Almost-Equal-To 0. Degree-Sign 7 for pointing, {zeta}{sub rms} Almost-Equal-To 0. Degree-Sign 7 for beam shape, and {mu}{sub rms} = 5 Multiplication-Sign 10{sup -4} for beam cross-polarization. Although the combined systematic effects produce a tolerance level on r twice as large for an experiment with linear polarizers, the resulting bias in r for a circular experiment is 15% which is still on the level of desirable sensitivity.

Karakci, Ata; Korotkov, Andrei; Tucker, Gregory S. [Department of Physics, Brown University, 182 Hope Street, Providence, RI 02912 (United States); Zhang Le; Timbie, Peter [Department of Physics, University of Wisconsin, Madison, WI 53706 (United States); Sutter, P. M.; Wandelt, Benjamin D. [Department of Physics, 1110 W. Green Street, University of Illinois at Urbana-Champaign, Urbana, IL 61801 (United States); Bunn, Emory F., E-mail: ata_karakci@brown.edu [Physics Department, University of Richmond, Richmond, VA 23173 (United States)

2013-07-15T23:59:59.000Z

230

Solitons in synthetic and biological polymers  

SciTech Connect (OSTI)

Solid state and statistical physics applications of soliton mathematics continue to expand rapidly. The present report describes connections between solid state (e.g. synthetic polymer) and biophysics, with strong nonlinearity playing the unifying role. Striking parallels examined include: analytical (as in the case of self-trapping mechanisms); numerical techniques; experimental implications, applications, and techniques. Conventional solid state probes are at last being devoted to biopolymers but their complexity is demanding new extremes and techniques.

Bishop, A.R.

1983-01-01T23:59:59.000Z

231

Synthetic and Biosynthetic Studies of Natural Products  

E-Print Network [OSTI]

of the Scholarly Communications program at the University of Kansas Libraries Center for Digital Scholarship. http://kuscholarworks.ku.edu B Y E. IfEJ.32 S Synthetic and Biosynthetic Studies of Natural Products Part I. Studies Directed Toward the Total Synthesis... of 4-Demethoxy -A-Homodaunorubicin Analogs Part II. Biosynthesis of Coloradocin. Origin of the Carbons Part III. Total Synthesis of the Naturally Occurring Prenylated Bibenzyl Amorfrutin A Eduardo Alberto Veliz Chanis B.S., University of Panama...

Ve?liz Chanis, Eduardo Alberto

1992-05-01T23:59:59.000Z

232

Invisible Synthetic Opiates and Acute Psychosis  

Science Journals Connector (OSTI)

...revisiting. Another striking fact is that nalbuphine may interfere with enzymatic methods for the detection of specific opiates, and it is virtually invisible to routine toxicologic tests,, as in the case we report. When there is suspicion of nalbuphine intoxication, routine screening for opiates should... To the Editor: Many acute psychotic episodes encountered in emergency situations are related to addictive substances. Nalbuphine is a synthetic opiate agonistantagonist, chemically related to both the opioid antagonist naloxone and the analgesic ...

2001-08-09T23:59:59.000Z

233

Aperture Test for Internal Target Operation in the JLAB High-current ERL  

SciTech Connect (OSTI)

A high current beam transmission test has been successfully completed at the JLAB FEL Facility, culminating in very low-loss transmission of a high current CW beam through a small aperture. The purpose of this test was to determine if an ERL is capable of meeting the stringent requirements imposed by the use of a 1018/cm3 internal gas target proposed for the DarkLight experiment*. Minimal beamline modifications were made to create a machine configuration that is substantially different from those used in routine UV or IR FEL operation. A sustained (8 hour) high power beam run was performed, with clean transmission through a 2 mm transverse aperture of 127 mm length simulating the target configuration. A beam size of 50 um (rms) was measured near the center of the aperture. Experimental data from a week-long test run consistently exhibited beam loss of only a few ppm on the aperture while running 4.5 mA current at 100 MeV -- or nearly 0.5 MW beam power. This surpassed the users? expectation and demonstrated a unique capability of an ERL for this type of experiments. This report presents a summary of the experiment, a brief overview of our activities, and outlines future plans.

Zhang, Shukui

2013-06-01T23:59:59.000Z

234

Correction schemes to improve the dynamical aperture of the Main Injector  

SciTech Connect (OSTI)

Tracking simulations have revealed that the dominant factors limiting the dynamical aperture of the Main Injector are the large octupole component and the random errors in the recycled Main Ring quadrupoles. This paper describes a correction scheme that reduces the effect of these errors on the performance of the Fermilab Main Injector, especially for the slow extraction operation.

Mishra, C.S.; Harfoush, F.A.

1993-07-01T23:59:59.000Z

235

Building starting model for full waveform inversion from wide-aperture data by stereotomography  

E-Print Network [OSTI]

Building starting model for full waveform inversion from wide-aperture data by stereotomography CGG Veritas, Massy, France; 3 LGIT - UJF - CNRS, France Abstract Building reliable starting model). In this study, we assess the stereotomography as a tool to build reliable starting model for frequency

Vallée, Martin

236

High-resolution fracture aperture mapping using optical profilometry Pasha Ameli,1  

E-Print Network [OSTI]

High-resolution fracture aperture mapping using optical profilometry Pasha Ameli,1 Jean E. Elkhoury] Fractures play an important role in the Earth's crust, often controlling both mechanical and transport of fracture surfaces and the contacts and void spaces between fracture surfaces at high spatial resolution (10

Elkhoury, Jean

237

THE USE OF LARGE APERTURE ACCELERATING TUBES AT HIGH POTENTIAL GRADIENTS  

E-Print Network [OSTI]

observed in a mass analysis of the residual vacuum. Before removal of the accelerating tubes the mercury1507 THE USE OF LARGE APERTURE ACCELERATING TUBES AT HIGH POTENTIAL GRADIENTS J. H. BROADHURST John H. Williams Laboratory of Nuclear Physics, University of Minnesota, Minneapolis, Minnesota 55455, U

Paris-Sud XI, Université de

238

Rock Joint Surfaces Measurement and Analysis of Aperture Distribution under Different Normal and Shear Loading Using GIS  

E-Print Network [OSTI]

Geometry of the rock joint is a governing factor for joint mechanical and hydraulic behavior. A new method of evaluating aperture distribution based on measurement of joint surfaces and three dimensional characteristics of each surface is developed. Artificial joint of granite surfaces are measured,processed, analyzed and three dimensional approaches are carried out for surface characterization. Parameters such as asperity's heights, slope angles, and aspects distribution at micro scale,local concentration of elements and their spatial localization at local scale are determined by Geographic Information System (GIS). Changes of aperture distribution at different normal stresses and various shear displacements are visualized and interpreted. Increasing normal load causes negative changes in aperture frequency distribution which indicates high joint matching. However, increasing shear displacement causes a rapid increase in the aperture and positive changes in the aperture frequency distribution which could be ...

Sharifzadeh, Mostafa; Esaki, Tetsuro

2009-01-01T23:59:59.000Z

239

A synthetic biology approach to bio-chem-ICT: first moves towards chemical communication between synthetic and natural cells  

Science Journals Connector (OSTI)

In this article we present novel aspects of the impact that synthetic biology (SB) can express in a field traditionally based on computer science: information and communication technologies (ICTs), an area that we will consider taking into account also ... Keywords: Artificial intelligence, Autonomy, Autopoiesis, Bio-chem-ICTs, Molecular communication, Quorum sensing, Synthetic biology, Synthetic cells

Giordano Rampioni; Fabio Mavelli; Luisa Damiano; Francesca D'angelo; Marco Messina; Livia Leoni; Pasquale Stano

2014-09-01T23:59:59.000Z

240

Program for field validation of the synthetic aperture focusing technique for ultrasonic testing (SAFT UT). Quarterly progress report, November 1980-January 1981  

SciTech Connect (OSTI)

The purpose of the project is to validate the usefulness of SAFT UT for industrial nondestructive evaluations (NDE). SAFT UT is an ultrasonic imaging method for accurate measurement of the spatial location and extent of acoustically reflective surfaces (flaws) contained in objects such as structural components and weldments in nuclear power reactor systems. The increased measurement accuracy offered by SAFT, when compared with that provided by measurement methods now in use, will improve the reliability of flaw severity assessments with resultant safety and economic benefits to the nuclear power industry.

Hamlin, D.R.; Jackson, J.L.; Mueller, T.A.

1981-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

On the Theory of Diffraction by an Aperture in an Infinite Plane Screen. II.  

Science Journals Connector (OSTI)

The diffraction of a scalar plane wave by an aperture in an infinite plane screen is examined theoretically. The wave function at an arbitrary point of space is expressed in terms of the discontinuity in its normal derivative at the screen, where the boundary condition is that of vanishing wave function. An integral equation for the discontinuity in normal derivative (or the residual function which measures its deviation from the simple distribution appropriate to a completely infinite screen) is the result of applying the boundary condition to the space wave function. Utilizing the integral equation (whose solution is generally unobtainable), the diffracted spherical wave amplitude at large distances from the aperture is cast into a form which is stationary with respect to small variations (relative to the correct values) of the residual functions arising from a pair of incident waves. An homogeneous expression for the amplitude is exhibited wherein the part independent of the residual functions defines a Kirchoff approximation. The connection with another stationary form of the amplitude, involving a pair of aperture wave functions, is examined. A variational expression for the plane wave transmission cross section of the aperture is based on the amplitude observed in the direction of incidence. The variational formulation is applied for a wave incident normally on a circular aperture. By comparison with the exact results available for this problem, it appears that use of simple residual functions in the variational formulation yields approximate, yet accurate expressions for the diffracted amplitude and transmission cross section over a wide range of frequencies.

Harold Levine and Julian Schwinger

1949-05-01T23:59:59.000Z

242

Determination of the linear aperture of the SSC (Superconducting Supercollider) clustered lattice used for the conceptual design report  

SciTech Connect (OSTI)

A study is made of the linear aperture for the clustered lattice used for the SSC Conceptual Design Report. Random multipole errors are included in all magnetic elements including the insertion dipoles and quadrupoles. Based on the concept of smear, the linear aperture is equal to the dynamic aperture in the range -0.1 less than or equal to ..delta..P/P less than or equal to 0.03%. Strong coupling for ..delta..P/P > 0% produces large smears. A variation of the smear parameter that is insensitive to coupling is proposed. A comparison is made with results reported in the SSC Conceptual Design Report.

Dell, G.F.

1986-06-23T23:59:59.000Z

243

Chemistry in Motion: Tiny Synthetic Motors  

E-Print Network [OSTI]

In this Account, we describe how synthetic motors that operate by self-diffusiophoresis make use of a self-generated concentration gradient to drive motor motion. A description of propulsion by self-diffusiophoresis is presented for Janus particle motors comprising catalytic and noncatalytic faces. The properties of the dynamics of chemically powered motors are illustrated by presenting the results of particle-based simulations of sphere-dimer motors constructed from linked catalytic and noncatalytic spheres. The geometries of both Janus and sphere-dimer motors with asymmetric catalytic activity support the formation of concentration gradients around the motors. Because directed motion can occur only when the system is not in equilibrium, the nature of the environment and the role it plays in motor dynamics are described. Rotational Brownian motion also acts to limit directed motion, and it has especially strong effects for very small motors. We address the following question: how small can motors be and still exhibit effects due to propulsion, even if only to enhance diffusion? Synthetic motors have the potential to transform the manner in which chemical dynamical processes are carried out for a wide range of applications.

Peter H. Colberg; Shang Yik Reigh; Bryan Robertson; Raymond Kapral

2014-11-03T23:59:59.000Z

244

Advanced Technology Large-Aperture Space Telescope (ATLAST): A Technology Roadmap for the Next Decade  

E-Print Network [OSTI]

The Advanced Technology Large-Aperture Space Telescope (ATLAST) is a set of mission concepts for the next generation of UVOIR space observatory with a primary aperture diameter in the 8-m to 16-m range that will allow us to perform some of the most challenging observations to answer some of our most compelling questions, including "Is there life elsewhere in the Galaxy?" We have identified two different telescope architectures, but with similar optical designs, that span the range in viable technologies. The architectures are a telescope with a monolithic primary mirror and two variations of a telescope with a large segmented primary mirror. This approach provides us with several pathways to realizing the mission, which will be narrowed to one as our technology development progresses. The concepts invoke heritage from HST and JWST design, but also take significant departures from these designs to minimize complexity, mass, or both. Our report provides details on the mission concepts, shows the extraordinary s...

Postman, Marc

2009-01-01T23:59:59.000Z

245

Gamma-ray observations of the Crab Region using a coded-aperture telescope  

SciTech Connect (OSTI)

The region of the Galactic anticenter, including the Crab Nebula, was observed during a balloon flight of the University of New Hampshire Directional Gamma-Ray Telescope employing the coded-aperture imaging technique to image celestial gamma-radiation between 160 keV and 9.3 MeV. The background systematics are treated with a simple and relatively straightforward correction procedure. The results demonstrate that the coded-aperture procedure is a viable approach for imaging not only point sources of radiation, but also extended sources of emission. The results for the Crab's photon spectrum are consistent with a power-law spectrum. Upper limits on the flux levels of line emission at 405 keV and 1050 keV and on the flux from the X-ray binary source A0535 + 26 and diffuse Galactic emission from the anticenter region are derived. 35 references.

Mcconnell, M.L.; Dunphy, P.P.; Forrest, D.J.; Chupp, E.L.; Owens, A.

1987-10-01T23:59:59.000Z

246

Coded aperture imaging system optimized for hard x-ray and gamma ray astronomy  

SciTech Connect (OSTI)

A coded aperture imaging system has been designed for the Gamma-Ray Imaging Spectrometer (GRIS). The system is optimized for imaging 511-keV positron-annihilation photons. For a galactic center 511-keV source strength of 10/sup -3/ cm/sup -2/s/sup -1/, the source location accuracy is expected to be +-0.2/sup 0/.

Gehrels, N.; Cline, T.L.; Huters, A.F.; Leventhal, M.; MacCallum, C.J.; Reber, J.D.; Stang, P.D.; Teegarden, B.J.; Tueller, J.

1985-01-01T23:59:59.000Z

247

RF/optical shared aperture for high availability wideband communication RF/FSO links  

SciTech Connect (OSTI)

An RF/Optical shared aperture is capable of transmitting and receiving optical signals and RF signals simultaneously. This technology enables compact wide bandwidth communications systems with 100% availability in clear air turbulence, rain and fog. The functions of an optical telescope and an RF reflector antenna are combined into a single compact package by installing an RF feed at either of the focal points of a modified Gregorian telescope.

Ruggiero, Anthony J; Pao, Hsueh-yuan; Sargis, Paul

2014-04-29T23:59:59.000Z

248

Spectral Study of DNA Adsorption on Natural and Synthetic Silicates  

Science Journals Connector (OSTI)

Adsorption and interaction capacity of DNA with three types of natural silicates (chrysotile, crocidolite, clinoptilolite) and one synthetic Y zeolite were studied. The influence of ... pretreatment of silicates ...

R. Stanescu-Dumitru; C. Mandravel

1997-01-01T23:59:59.000Z

249

Synthetic nanotubes lay foundation for new technology: Artificial...  

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

Synthetic nanotubes lay foundation for new technology: Artificial pores mimic key features of natural pores By Tona Kunz * July 17, 2012 Tweet EmailPrint Scientists have overcome...

250

US Synthetic Corp (TRL 4 Component) - The Development of Open...  

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

Polycrystalline Diamond Thrust Bearings for use in Marine Hydrokinetic (MHK) Energy Machines US Synthetic Corp (TRL 4 Component) - The Development of Open, Water Lubricated...

251

Intramolecular hydrogen bonding as a synthetic tool to induce...  

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

Intramolecular hydrogen bonding as a synthetic tool to induce chemical selectivity in acid catalyzed porphyrin synthesis Authors: Megiatto, J. D., Patterson, D., Sherman, B. D.,...

252

Vehicle Technologies Office Merit Review 2014: Synthetic Solutions...  

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

about synthetic solutions for correcting voltage fade in LMR-NMC cathodes. es190johnson2014o.pdf More Documents & Publications Cathode Synthesis and Voltage Fade: Designed...

253

Design of a near-field coded aperture cameras for high-resolution medical and industrial gamma-ray imaging  

E-Print Network [OSTI]

Coded Aperture Imaging is a technique originally developed for X-ray astronomy, where typical imaging problems are characterized by far-field geometry and an object made of point sources distributed over a mainly dark ...

Accorsi, Roberto, 1971-

2001-01-01T23:59:59.000Z

254

Tying new knots in synthetic biology  

SciTech Connect (OSTI)

Recent years have seen the emergence of synthetic biology, which encompasses the engineering of living organisms as well as the implementation of biological behavior in non-living substrates. Many of these engineered systems have harnessed the diverse toolkit of proteins, genes, and cellular processes that nature offers. While these efforts have been fruitful, they have also illustrated the difficulty associated with programming highly complex functions by tapping into cellular processes. Another set of efforts has focused on building circuits, performing computation, and constructing nanoscale machines using nucleic acids. Zhang et al., 2007, Science 318, 1121 1125 and Yin et al., 2008, Nature 451, 318 322 recently demonstrated flexible approaches for the modular construction of such biochemical devices exclusively using DNA. These approaches have exciting implications both for engineering living cells and for mimicking life-like behavior at the nanoscale.

Simpson, Michael L [ORNL; Karig, David K [ORNL

2008-01-01T23:59:59.000Z

255

Synthetic DNA minor groove-binding drugs  

Science Journals Connector (OSTI)

In this review, both cationic and neutral synthetic ligands that bind in the minor groove of DNA are discussed. Certain bis-distamycins and related lexitropsins show activities against human immunodeficiency virus (HIV)-1 and HIV-2 at low nanomolar concentrations. DAPI binds strongly to AT-containing polymers and is located in the minor groove of DNA. DAPI intercalates in DNA sequences that do not contain at least three consecutive AT bp. Berenil can also exhibit intercalative, as well as minor groove binding, properties depending on sequence. Furan-containing analogues of berenil play an important role in their activities against Pneumocystis carinii and Cryptosporidium parvuam infections in vivo. Pt(II)-berenil conjugates show a good activity profile against HL60 and U-937 human leukemic cells. Pt-pentamidine shows higher antiproliferative activity against small cell lung, non-small cell lung, and melanoma cancer cell lines compared with many other tumor cell lines. trans-Butenamidine shows good anti-P. carinii activity in rats. Pentamidine is used against P. carinii pneumonia in individuals infected with HIV who are at high risk from this infection. A comparison of the cytotoxic potencies of adozelesin, bizelesin, carzelesin, cisplatin, and doxorubicin indicates that adozelesin is a potent analog of CC-1065. Naturally occurring pyrrolo[2,1-c][1,4]benzodiazepines such as anthramycin have a 2- to 3-bp sequence specificity, but a synthetic PBD dimer spans 6 bp, actively recognizing a central 5?-GATC sequence. The crosslinking efficiency of PBD dimers is much greater than that of other major groove crosslinkers, such as cisplatin, melphalan, etc. Neothramycin is used clinically for the treatment of superficial carcinoma of the bladder.

B.S.Praveen Reddy; S.Murari Sondhi; J.William Lown

1999-01-01T23:59:59.000Z

256

Interferometric Mapping of Magnetic Fields: The massive star forming region G34.4+0.23 MM  

E-Print Network [OSTI]

We report millimeter interferometric observations of polarized continuum and line emission from the massive star forming region G34.4. Polarized thermal dust emission at 3 mm wavelength and CO $J=1 \\to 0$ line emission were observed using the Berkeley-Illinois-Maryland Association (BIMA) array. Our results show a remarkably uniform polarization pattern in both dust and in CO J=$1 \\to 0$ emission. In addition, the line emission presents a consistent uniform polarization pattern over most of the velocity channel maps. These uniform polarization patterns are aligned with the north-south main axis of the filament between the main millimeter source (MM) and the ultra-compact H {\\scriptsize II} region, which are the central sources in G34.4, suggesting a magnetic field orthogonal to this axis. This morphology is consistent with a magnetically supported disk seen roughly edge-on.

P. C. Cortes; R. M. Crutcher; D. Shepherd; L. Bronfman

2008-01-28T23:59:59.000Z

257

RESEARCH ARTICLE Ensuring the security of synthetic biology--towards  

E-Print Network [OSTI]

RESEARCH ARTICLE Ensuring the security of synthetic biology--towards a 5P governance strategy the label ``synthetic biology'' has been attached to a number of diverse research and commercial activities, ranging from the search for a min- imal cell to the quick delivery of customized genes by DNA synthesis

Sussex, University of

258

Automated Selection of Synthetic Biology Parts for Genetic Regulatory Networks  

E-Print Network [OSTI]

Automated Selection of Synthetic Biology Parts for Genetic Regulatory Networks Fusun Yaman: Raising the level of abstraction for synthetic biology design requires solving several challenging problems, including mapping abstract designs to DNA sequences. In this paper we present the first formalism

Densmore, Douglas

259

Synthetic Biology Domitilla Del Vecchio* and Richard M. Murray**  

E-Print Network [OSTI]

1 Synthetic Biology Domitilla Del Vecchio* and Richard M. Murray** *Department of Mechanical@cds.caltech.edu Abstract--The past decade has seen tremendous advances in DNA recombination and measurement techniques functions is now pos- sible, leading to the birth of a new field called synthetic biology. Sophisticated

Del Vecchio, Domitilla

260

Supporting Information for: Synthetic Control of Green Fluorescent Protein (GFP)  

E-Print Network [OSTI]

, and then using DNA ligase to insert synthetic oligonucleotides containing the loop sequence were inserted usingS1 Supporting Information for: Synthetic Control of Green Fluorescent Protein (GFP) Kevin P. Kent the genes in pET-15b with restriction enzymes that cut the DNA close to the desired loop insertion site

Boxer, Steven G.

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

1 - Gasification and synthetic liquid fuel production: an overview  

Science Journals Connector (OSTI)

Abstract This chapter discusses general considerations on gasification processes and synthetic liquid fuel production. It provides an overview of state-of-the-art gasification technologies, feedstocks and applications in power generation, and synthetic fuels production, together with some recent future trends in the field.

R. Luque; J.G. Speight

2015-01-01T23:59:59.000Z

262

Synthetic logs generator for fraud detection in mobile transfer services  

E-Print Network [OSTI]

Synthetic logs generator for fraud detection in mobile transfer services Chrystel Gaber, Baptiste to commit crimes and avoid detection, research in the field of fraud is always evolving. However, trans synthetic logs with real ones. I. INTRODUCTION Frauds in the field of electronic payment evolve contin

Paris-Sud XI, Université de

263

SynFlo: an interactive installation introducing synthetic biology concepts  

Science Journals Connector (OSTI)

SynFlo is an interactive installation that utilizes tangible interaction to help illustrate core concepts of synthetic biology through outreach programs. This playful installation allows users to create useful virtual life forms from standardized genetic ... Keywords: E. chromi, microsoft surface, sifteo cubes, synthetic biology, tangible user interfaces

Kimberly Chang; Wendy Xu; Nicole Francisco; Consuelo Valdes; Robert Kincaid; Orit Shaer

2012-11-01T23:59:59.000Z

264

Operation Allelopathy: An Experiment Investigating an Alternative to Synthetic Agrochemicals  

Science Journals Connector (OSTI)

Operation Allelopathy: An Experiment Investigating an Alternative to Synthetic Agrochemicals ... The experiment involves an evaluation by students of the potential of plant extracts as an alternative to synthetic agrochemicals to identify new ecological farming techniques that could be applied in agriculture. ... Instead, natural products constitute an attractive source of agrochemicals with great potential. ...

Nuria Chinchilla; Alexandra G. Durn; Ceferino Carrera; Jess Ayuso; Francisco A. Macas

2013-11-22T23:59:59.000Z

265

Expanding Coherent Array Processing to Larger Apertures Using Empirical Matched Field Processing  

SciTech Connect (OSTI)

We have adapted matched field processing, a method developed in underwater acoustics to detect and locate targets, to classify transient seismic signals arising from mining explosions. Matched field processing, as we apply it, is an empirical technique, using observations of historic events to calibrate the amplitude and phase structure of wavefields incident upon an array aperture for particular repeating sources. The objective of this project is to determine how broadly applicable the method is and to understand the phenomena that control its performance. We obtained our original results in distinguishing events from ten mines in the Khibiny and Olenegorsk mining districts of the Kola Peninsula, for which we had exceptional ground truth information. In a cross-validation test, some 98.2% of 549 explosions were correctly classified by originating mine using just the Pn observations (2.5-12.5 Hz) on the ARCES array at ranges from 350-410 kilometers. These results were achieved despite the fact that the mines are as closely spaced as 3 kilometers. Such classification performance is significantly better than predicted by the Rayleigh limit. Scattering phenomena account for the increased resolution, as we make clear in an analysis of the information carrying capacity of Pn under two alternative propagation scenarios: free-space propagation and propagation with realistic (actually measured) spatial covariance structure. The increase in information capacity over a wide band is captured by the matched field calibrations and used to separate explosions from very closely-spaced sources. In part, the improvement occurs because the calibrations enable coherent processing at frequencies above those normally considered coherent. We are investigating whether similar results can be expected in different regions, with apertures of increasing scale and for diffuse seismicity. We verified similar performance with the closely-spaced Zapolyarni mines, though discovered that it may be necessary to divide event populations from a single mine into identifiable subpopulations. For this purpose, we perform cluster analysis using matched field statistics calculated on pairs of individual events as a distance metric. In our initial work, calibrations were derived from ensembles of events ranging in number to more than 100. We are considering the performance now of matched field calibrations derived with many fewer events (even, as mentioned, individual events). Since these are high-variance estimates, we are testing the use of cross-channel, multitaper, spectral estimation methods to reduce the variance of calibrations and detection statistics derived from single-event observations. To test the applicability of the technique in a different tectonic region, we have obtained four years of continuous data from 4 Kazakh arrays and are extracting large numbers of event segments. Our initial results using 132 mining explosions recorded by the Makanchi array are similar to those obtained in the European Arctic. Matched field processing clearly separates the explosions from three closely-spaced mines located approximately 400 kilometers from the array, again using waveforms in a band (6-10 Hz) normally considered incoherent for this array. Having reproduced ARCES-type performance with another small aperture array, we have two additional objectives for matched field processing. We will attempt to extend matched field processing to larger apertures: a 200 km aperture (the KNET) and, if data permit, to an aperture comprised of several Kazakh arrays. We also will investigate the potential of developing matched field processing to roughly locate and classify natural seismicity, which is more diffuse than the concentrated sources of mining explosions that we have investigated to date.

Ringdal, F; Harris, D B; Kvaerna, T; Gibbons, S J

2009-07-23T23:59:59.000Z

266

A Synthetic Resilin Is Largely Unstructured  

SciTech Connect (OSTI)

Proresilin is the precursor protein for resilin, an extremely elastic, hydrated, cross-linked insoluble protein found in insects. We investigated the secondary-structure distribution in solution of a synthetic proresilin (AN16), based on 16 units of the consensus proresilin repeat from Anopheles gambiae. Raman spectroscopy was used to verify that the secondary-structure distributions in cross-linked AN16 resilin and in AN16 proresilin are similar, and hence that solution techniques (such as NMR and circular dichroism) may be used to gain information about the structure of the cross-linked solid. The synthetic proresilin AN16 is an intrinsically unstructured protein, displaying under native conditions many of the characteristics normally observed in denatured proteins. There are no apparent {alpha}-helical or {beta}-sheet features in the NMR spectra, and the majority of backbone protons and carbons exhibit chemical shifts characteristic of random-coil configurations. Relatively few peaks are observed in the nuclear Overhauser effect spectra, indicating that overall the protein is dynamic and unstructured. The radius of gyration of AN16 corresponds to the value expected for a denatured protein of similar chain length. This high degree of disorder is also consistent with observed circular dichroism and Raman spectra. The temperature dependences of the NH proton chemical shifts were also measured. Most values were indicative of protons exposed to water, although smaller dependences were observed for glycine and alanine within the Tyr-Gly-Ala-Pro sequence conserved in all resilins found to date, which is the site of dityrosine cross-link formation. This result implies that these residues are involved in hydrogen bonds, possibly to enable efficient self-association and subsequent cross-linking. The {beta}-spiral model for elastic proteins, where the protein is itself shaped like a spring, is not supported by the results for AN16. Both the random-network elastomer model and the sliding {beta}-turn model are consistent with the data. The results indicate a flat energy landscape for AN16, with very little energy required to switch between conformations. This ease of switching is likely to lead to the extremely low energy loss on deformation of resilin.

Nairn, Kate M.; Lyons, Russell E.; Mulder, Roger J.; Mudie, Stephen T.; Cookson, David J.; Lesieur, Emmanuelle; Kim, Misook; Lau, Deborah; Scholes, Fiona H.; Elvin, Christopher M. (CSIRO/MSE); (CSIRO/MHT); (CSIRO/LI); (Aust. Synch.)

2008-11-03T23:59:59.000Z

267

Tune modulation due to synchrotron oscillations and chromaticity, and the dynamic aperture  

SciTech Connect (OSTI)

A tracking study was done of the effects of a tune modulation, due to synchrotron oscillations and the tune dependence on momentum (chromaticity), on the dynamic aperture. The studies were done using several RHIC lattices and tracking runs of about 1 {times} 10{sup 6} turns. The dynamic aperture was found to decrease roughly linearly with the amplitude of the tune modulation and may be represented by A = A{sub o}(l--10 {Delta}{nu}) where A{sub o} is the dynamic aperture for {Delta}{nu} = 0, and {Delta}{nu} is the tune modulation amplitude. In Eq. (1), the range of {Delta}{nu} is such that lower order non-linear resonances, like the 1/3 and 1/4 resonance axe not crossed because of the tune modulation. Three different cases were studied, corresponding to RHIC lattices with different {beta}*, and with different synchrotron oscillation amplitudes. In each case, the tune modulation amplitude was varied by changing the chromaticity. In each case, roughly the same result, Eq. (1), was found. The result found here for the effect of a tune modulation due to chromaticity may be compared with the result found for the effect of a tune modulation due to a gradient ripple in the quadrupoles, which was A = A{sub o}(l--42 {Delta}{nu}). The effect of a {Delta}{nu} due to a gradient ripple appears to be about 4 times stronger than the effect of a {Delta}{nu} due to chromaticity and synchrotron oscillations.

Parzen, G.

1994-03-01T23:59:59.000Z

268

FODO-Supercell Based Compact Ring Design with Tunable Momentum Compaction and Optimized Dynamic Aperture  

SciTech Connect (OSTI)

A storage ring with tunable momentum compaction has the advantage in achieving different RMS bunch length with similar RF capacity, which is potentially useful for many applications, such as linear collider damping ring and pre-damping ring where injected beam has a large energy spread and a large transverse emittance. A tunable bunch length also makes the commissioning and fine tuning easier in manipulating the single bunch instabilities. In this paper, a compact ring design based on a supercell is presented, which achieves a tunable momentum compaction while maintaining a large dynamic aperture.

Sun, Yipeng; /SLAC

2012-05-11T23:59:59.000Z

269

Ion funnel with extended mass range and reduced conductance limit aperture  

DOE Patents [OSTI]

An improved ion funnel design is disclosed that decreases the axial RF (parasite) fields at the ion funnel exit. This is achieved by addition of one or more compensation electrodes after the conductance limit electrode. Various RF voltage profiles may be applied to the various electrodes minimizing the parasite axial potential wells. The smallest RF aperture that serves as the conductance limiting electrode is further reduced over standard designs. Overall, the ion funnel improves transmission ranges of both low m/z and high m/z ions, reducing RF activation of ions and decreasing the gas load to subsequent differential pumping stages.

Tolmachev, Aleksey V. (Richland, WA); Smith, Richard D. (Richland, WA)

2008-04-01T23:59:59.000Z

270

Superposition and Synthetic Genetic Devices: Framework and Model System to Investigate Linearity in Escherichia coli  

E-Print Network [OSTI]

into the host cell as DNA, a synthetic device must first beAdie T, Baldwin GS: DNA assembly for synthetic biology: fromdevices (synthetic and native) in the form of DNA act as

Hajimorad, Meghdad

2011-01-01T23:59:59.000Z

271

Meta-DNA: A DNA-Based Approach to Synthetic Biology  

Science Journals Connector (OSTI)

The goal of synthetic biology is to design and assemble synthetic systems that mimic biological systems. One of the most fundamental challenges in synthetic biology is to synthesize artificial biochemical syst...

Harish Chandran; Nikhil Gopalkrishnan

2014-01-01T23:59:59.000Z

272

A syntactic model to design and verify synthetic genetic constructs derived from standard biological parts  

Science Journals Connector (OSTI)

......parsers capable of verifying the structural validity of a synthetic DNA sequence. Several prominent synthetic biologists have...2006), a software application to quickly design synthetic DNA molecules from a library of basic parts, has been inspired......

Yizhi Cai; Brian Hartnett; Claes Gustafsson; Jean Peccoud

2007-10-15T23:59:59.000Z

273

Quantitative study of Helicobacter pylori in gastric mucus by competitive PCR using synthetic DNA fragments.  

Science Journals Connector (OSTI)

...mucus by competitive PCR using synthetic DNA fragments T Furuta E Kaneko M...method using various amounts of synthetic DNA fragments containing the same...mucus by competitive PCR using synthetic DNA fragments. | Helicobacter pylori...

T Furuta; E Kaneko; M Suzuki; H Arai; H Futami

1996-10-01T23:59:59.000Z

274

Synthetic DNA probes for detection of enterotoxigenic Clostridium perfringens strains isolated from outbreaks of food poisoning.  

Science Journals Connector (OSTI)

...research-article Research Article Synthetic DNA probes for detection of enterotoxigenic...potential to produce enterotoxin. Synthetic DNA probes for detection of enterotoxigenic...American Society for Microbiology Synthetic DNA Probes for Detection of Enterotoxigenic...

M Van Damme-Jongsten; J Rodhouse; R J Gilbert; S Notermans

1990-01-01T23:59:59.000Z

275

DNA adsorption on synthetic and natural allophanes  

Science Journals Connector (OSTI)

The adsorption of DNA on natural and synthetic samples of allophane, which is a primary clay mineral of andosols, was investigated with respect to the DNA concentration, pH, ionic strength in the sample solution, and competition between DNA molecules and phosphate ions for adsorption to understand the behavior of extracellular DNA molecules in andosols. The relationships between DNA adsorption and the final concentrations were significantly fitted to a simple linear Langmuir equation. DNA adsorption decreased considerably with increasing suspension pH in the range between 3 and 9. The adsorption was less affected by the ionic strength of the suspension from 0.1 to 0.5molL?1. Under the same experimental conditions, DNA adsorption on allophanes was relatively higher than that on montmorillonite and silica but relatively lower than that on gibbsite and goethite. DNA adsorption on allophanes decreased on the addition of phosphate, indicating that there was a competition between DNA molecules and phosphate ions for adsorption on the minerals. These results suggested that DNA adsorption on allophanes occurred via two mechanisms: direct bonding of the phosphate group at the end of the DNA molecule to the OH groups of the Al-oxide layer on allophane, and the association of DNA molecules with the surface of negatively charged allophane via a bridging of inorganic cations.

Kazutoshi Saeki; Masao Sakai; Shin-Ichiro Wada

2010-01-01T23:59:59.000Z

276

Naphthenic acid corrosion in synthetic fuels production  

SciTech Connect (OSTI)

Serious corrosion damage to carbon steel piping in a fractionation unit associated with synthetic fuels production has been ascribed to the presence of naphthenic acids. Investigation of the problem revealed total acids numbers (TAN) ranging from 8--12mg KOH/g in the feed to the unit. Damage typically occurred in the temperature range 180--240 C and manifested as localized pitting, preferential weld corrosion, general wall thinning and end-grain attack. Filming amine corrosion inhibitors designed for refinery overhead systems have been proven ineffective and high temperature phosphate-based inhibitors could not be used due to potential catalyst poisoning in downstream refinery units. Coupon exposures indicated corrosion rates in the order of 2 mm/y on carbon steel in a reboiler line as well as pitting to austenitic stainless steel type UNS S30403. Line replacement in austenitic stainless steel UNS S31603 has been proven effective. The performance of this alloy is mainly ascribed to its molybdenum content. The absence of sulfur in the feed to the unit is also contributing to the alloy performance despite the extremely high total acid numbers.

Bruyn, H.I. de [Mossgas Ltd., Mossel Bay (South Africa)

1998-12-31T23:59:59.000Z

277

Heuristic for Maximizing DNA Reuse in Synthetic DNA Library Assembly  

Science Journals Connector (OSTI)

Heuristic for Maximizing DNA Reuse in Synthetic DNA Library Assembly ... In concert with entirely de novo synthesis, a swathe of alternative DNA assembly methods are being introduced(4-6) that concatenate parts from hundreds of base pairs in length, through gene fusions, to synthetic biological devices built from catalogued parts, up to megabase fragments and entire chromosomes. ... De novo synthesis relies on synthetic oligos that are inherently error prone, and therefore, reusing existing error-free DNA in constructing new DNA provides an inherent advantage. ...

Jonathan Blakes; Ofir Raz; Uriel Feige; Jaume Bacardit; Pawe? Widera; Tuval Ben-Yehezkel; Ehud Shapiro; Natalio Krasnogor

2014-02-20T23:59:59.000Z

278

Applying Synthetic Lethality for the Selective Targeting of Cancer  

Science Journals Connector (OSTI)

...not yet been matched by progress in its clinical application. Nevertheless, synthetic lethality is a promising rationale that is ready for clinical testing. Time will tell how synthetic lethality will be integrated into therapeutic approaches. Synthetic lethality refers to the requirement that two defects be present for cell death to occur. When an agent damages DNA, its effects on the cell can be amplified if the efforts of the cell to repair the damage are inhibited. Clinical application of this idea is just beginning.

McLornan D.P.List A.Mufti G.J.

2014-10-30T23:59:59.000Z

279

Resolution of prominent crustal scatterers near the Noress small-aperture array  

Science Journals Connector (OSTI)

......Sereno T.J. Jr. , Orcutt J.A., 1985b. Synthesis of Realistic Oceanic Pn Wave Trains J. geophys. Res., 90, 12 755-12776. Sereno T.J. Jr. , Orcutt J.A., 1987. Synthetic Pn and Sn phases and the frequency dependence of Q in oceanic lithosphere......

Michael A. H. Hedlin; Jean-Bernard Minster; John A. Orcutt

1994-10-01T23:59:59.000Z

280

Unscheduled DNA synthesis and mitochondrial DNA synthetic rate following injury of the facial nerve  

Science Journals Connector (OSTI)

Unscheduled DNA synthesis (UDS) of nuclear DNA and mitochondrial (mt) DNA synthetic rates were determined autoradiographically in different cell ... nerve transection. In addition to an increased synthetic rate ...

H. Korr; V. Philippi; C. Helg; J. Schiefer; M. B. Graeber

1997-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

Flourishing and Discordance: On Two Modes of Human Science Engagement with Synthetic Biology  

E-Print Network [OSTI]

single stranded synthetic DNA, the fact that ligation indo: putting a piece of synthetic DNA in a host. But I think

Stavrianakis, Anthony

2012-01-01T23:59:59.000Z

282

Synthetic Nano-Low Density Lipoprotein as Targeted Drug Delivery Vehicle for Glioblastoma Multiforme  

E-Print Network [OSTI]

Synthetic Nano-Low Density Lipoprotein as Targeted Drugmicroemulsion; peptide; nano-low density lipoproteintherapeutic agents. A synthetic nano-LDL (nLDL) particle was

Nikanjam, Mina; Blakely, Eleanor A.; Bjornstad, Kathleen A.; Shu, Xiao; Budinger, Thomas F.; Forte, Trudy M.

2006-01-01T23:59:59.000Z

283

Tune modulation due to synchrotron oscillations and chromaticity, and the dynamic aperture  

SciTech Connect (OSTI)

A tracking study was done of the effects of a tune modulations, due to synchrotron oscillations and the tune dependence on momentum (chromaticity), on the dynamic aperture. The studies were done using several RHIC lattices and tracking runs of about 1 {times} 10{sup 6} turns. The dynamic aperture was found to decrease roughly linearly with the amplitude of the tune modulation. Lower order non-linear resonances, like the 1/3 and 1/4 resonance are not crossed because of the tune modulation. Three different cases were studied, corresponding to RHIC lattices with different {beta}*, and with different synchrotron oscillation amplitudes. In each case, the tune modulation amplitude was varied by changing the chromaticity. In each case, roughly the same result, was found. The result found here for the effect of a tune modulation due to chromaticity may be compared with the result found for the effect of a tune modulation due to a gradient ripple in the quadrupoles. The effect of a tune modulation due to a gradient ripple appears to be about 4 times stronger than the effect of a tune modulation due to chromaticity and synchrotron oscillations.

Parzen, G.

1995-05-01T23:59:59.000Z

284

Simultaneous usage of pinhole and penumbral apertures for imaging small scale neutron sources from inertial confinement fusion experiments  

SciTech Connect (OSTI)

Inertial confinement fusion experiments at the National Ignition Facility are designed to understand the basic principles of creating self-sustaining fusion reactions by laser driven compression of deuterium-tritium (DT) filled cryogenic plastic capsules. The neutron imaging diagnostic provides information on the distribution of the central fusion reaction region and the surrounding DT fuel by observing neutron images in two different energy bands for primary (13-17 MeV) and down-scattered (6-12 MeV) neutrons. From this, the final shape and size of the compressed capsule can be estimated and the symmetry of the compression can be inferred. These experiments provide small sources with high yield neutron flux. An aperture design that includes an array of pinholes and penumbral apertures has provided the opportunity to image the same source with two different techniques. This allows for an evaluation of these different aperture designs and reconstruction algorithms.

Guler, N.; Volegov, P.; Danly, C. R.; Grim, G. P.; Merrill, F. E.; Wilde, C. H. [Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545 (United States)

2012-10-15T23:59:59.000Z

285

Specification of fields quality in the interaction region magnets of the high luminosity LHC based on dynamic aperture  

E-Print Network [OSTI]

New large aperture Inner Triplet quadrupoles, separation dipoles and the nearby matching quadrupoles will be installed in the low-beta interaction regions (IR) of the high luminosity LHC upgrade (HL-LHC) [1]. The large aperture is necessary for accommodating the increased beam size due to much higher beta functions in these magnets for the low collision optics. The high beta functionswill amplify the effects of field errors in the new magnets leading to a smaller dynamic aperture (DA). It is, therefore, critical to evaluate the impact of these errors on the DA and specify the magnet field quality (FQ) satisfying an acceptable DA while being realistically achievable. The study is performed for the HL-LHC lattice layouts SLHCV3.1b and HLLHCV1.0 for collision and injection energies.

Nosochkov, Y; Wang, M H; Fartoukh, S; Giovannozzi, M; De Maria, R; McIntosh, E

2014-01-01T23:59:59.000Z

286

113 Lab Learning Objectives Week 5: synthetic lab #4  

E-Print Network [OSTI]

113 Lab Learning Objectives Week 5: synthetic lab #4 Learning Objectives for Promoter Discovery the information contained within promoters. · Use protocols for molecular biology to clone DNA. · Interpret

Campbell, A. Malcolm

287

Stabilizing synthetic data in the DNA of living organisms  

Science Journals Connector (OSTI)

Data-encoding synthetic DNA, inserted into the genome of a living ... generations, one of the merits of using DNA material is long-term data storage within ... broken by mutation, deletion, and insertion of DNA, ...

Nozomu Yachie; Yoshiaki Ohashi; Masaru Tomita

2008-06-01T23:59:59.000Z

288

Integrating ethical analysis Into the DNA of synthetic biology  

Science Journals Connector (OSTI)

How to do this? Such analysis should take account of the fact that synthetic biology has several distinct sub-fields; these... Design of DNAwhich can then be placed in a...2010

Patrick Heavey

2014-09-01T23:59:59.000Z

289

Nucleic Acid Library Construction Using Synthetic DNA Constructs  

Science Journals Connector (OSTI)

The synthesis of a high-diversity double-stranded DNA pool can require hundreds of milliliters of...3,10...). Large volumes are required because the maximum concentration of single-stranded synthetic DNA template...

Hani S. Zaher; Peter J. Unrau

2005-01-01T23:59:59.000Z

290

Aromatic Interactions in Proteins, DNA and Synthetic Receptors  

Science Journals Connector (OSTI)

...research-article Aromatic Interactions in Proteins, DNA and Synthetic Receptors C. A. Hunter Non-covalent interactions between...and three-dimensional structure in double-helical DNA. The - interaction model has been used to calculate the...

1993-01-01T23:59:59.000Z

291

113 Lab Learning Objectives Week 8: synthetic lab #7  

E-Print Network [OSTI]

113 Lab Learning Objectives Week 8: synthetic lab #7 Learning Objectives for Promoter Discovery Selection Skills · Read DNA sequence and search for SNPs using ApE software. · Determine your PTC tasting

Campbell, A. Malcolm

292

Sequence Specific Recognition of Double Helical DNA. A Synthetic Approach  

Science Journals Connector (OSTI)

The design of synthetic sequence-specific DNA-binding molecules has advanced in recent years ... rapid and precise analyses of hundreds of potential DNA-binding sites to nucleotide resolution on sequencing ... bi...

P. B. Dervan

1988-01-01T23:59:59.000Z

293

Exploiting synthetic lethal interactions for targeted cancer therapy  

E-Print Network [OSTI]

Emerging data suggests that synthetic lethal interactions between mutated oncogenes/tumor suppressor genes and molecules involved in DNA damage signaling and repair can be therapeutically exploited to preferentially kill ...

Jiang, Hai

294

Retroactivity, modularity, and insulation in synthetic biology circuits  

E-Print Network [OSTI]

A central concept in synthetic biology is the reuse of well-characterized modules. Modularity simplifies circuit design by allowing for the decomposition of systems into separate modules for individual construction. Complex ...

Lin, Allen

2011-01-01T23:59:59.000Z

295

Defossiling Fuel: How Synthetic Biology Can Transform Biofuel Production  

E-Print Network [OSTI]

Defossiling Fuel: How Synthetic Biology Can Transform Biofuel Production David F. Savage , Jeffrey through natural intermediates to final molecule is long, and biofuel production is perhaps the ultimate engineering, economic, political, and environmental realities. Are biofuels sustainable? Consider U

296

What is Synthetic Biology? Application of engineering principles  

E-Print Network [OSTI]

to the design and construction of biological parts, devices, and systems with applications in energy, medicine;Biofuels from Algae CO -neutral2 1,000,000 gallons in 2008 18 #12;Synthetic Biology Biochemistry

Campbell, A. Malcolm

297

Magnetic behaviour of synthetic Co2SiO4  

Science Journals Connector (OSTI)

The magnetic structure of the synthetic cobalt olivine, Co2SiO4, is determined by means of non-polarized and polarized neutron diffraction on single-crystal and powder samples.

Sazonov, A.

2009-11-16T23:59:59.000Z

298

Wafer-Scale Synthesis of Monodisperse Synthetic Magnetic Multilayer Nanorods  

Science Journals Connector (OSTI)

Wafer-Scale Synthesis of Monodisperse Synthetic Magnetic Multilayer Nanorods ... Department of Materials Science and Engineering, Department of Mechanical Engineering, and Department of Electrical Engineering, Stanford University, Stanford, California 94305, United States ...

Mingliang Zhang; Daniel J. B. Bechstein; Robert J. Wilson; Shan X. Wang

2013-12-12T23:59:59.000Z

299

Synthetic strategies for the design of platinum anticancer drug candidates  

E-Print Network [OSTI]

Chapter 1. The Synthetic Chemistry of Platinum Anticancer Agents Since the inception of cisplatin as a clinically approved anticancer agent, a large number of platinum compounds have been synthesized with the aim of finding ...

Wilson, Justin Jeff

2013-01-01T23:59:59.000Z

300

Synthetic approaches to the activation of substituted 2-methyl pyridines  

E-Print Network [OSTI]

increases in the yield and rate of these reactions is an important objective. This thesis describes synthetic approaches to a new class of ligands containing two picolinic acid units conected together by a non-oxidizable chain. An improved procedure...

Cancanon, Fernadina de la Caridad

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

Biofuel production by in vitro synthetic enzymatic pathway biotransformation  

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

49; 49; NO. OF PAGES 7 Please cite this article in press as: Zhang Y-H P., et al. Biofuel production by in vitro synthetic enzymatic pathway biotransformation, Curr Opin Biotechnol (2010), doi:10.1016/j.copbio.2010.05.005 Available online at www.sciencedirect.com Biofuel production by in vitro synthetic enzymatic pathway biotransformation Y-H Percival Zhang 1,2,3 , Jibin Sun 4 and Jian-Jiang Zhong 5 Cell-free synthetic pathway biotransformation (SyPaB) is the implementation of complicated biochemical reactions by in vitro assembling a number of enzymes or their complexes and coenzymes. Assembly of numerous enzymes without cellular membrane, gene regulation, or undesired pathway can circumvent some of the obstacles to modifying living microorganisms. Several synthetic pathways for the production of liquid biofuels - alcohols and hydrocarbon precursors (polyols)

302

First-light LBT nulling interferometric observations: warm exozodiacal dust resolved within a few AU of eta Corvi  

E-Print Network [OSTI]

We report on the first nulling interferometric observations with the Large Binocular Telescope Interferometer (LBTI), resolving the N' band (9.81 - 12.41 um) emission around the nearby main-sequence star eta Crv (F2V, 1-2 Gyr). The measured source null depth amounts to 4.40% +/- 0.35% over a field-of-view of 140 mas in radius (~2.6\\,AU at the distance of eta Corvi) and shows no significant variation over 35{\\deg} of sky rotation. This relatively low null is unexpected given the total disk to star flux ratio measured by Spitzer/IRS (~23% across the N' band), suggesting that a significant fraction of the dust lies within the central nulled response of the LBTI (79 mas or 1.4 AU). Modeling of the warm disk shows that it cannot resemble a scaled version of the Solar zodiacal cloud, unless it is almost perpendicular to the outer disk imaged by Herschel. It is more likely that the inner and outer disks are coplanar and the warm dust is located at a distance of 0.5-1.0 AU, significantly closer than previously predic...

Defrre, D; Skemer, A J; Kennedy, G M; Bailey, V P; Hoffmann, W F; Mennesson, B; Millan-Gabet, R; Danchi, W C; Absil, O; Arbo, P; Beichman, C; Brusa, G; Bryden, G; Downey, E C; Durney, O; Esposito, S; Gaspar, A; Grenz, P; Haniff, C; Hill, J M; Lebreton, J; Leisenring, J M; Males, J R; Marion, L; McMahon, T J; Montoya, M; Morzinski, K M; Pinna, E; Puglisi, A; Rieke, G; Roberge, A; Serabyn, E; Sosa, R; Stapeldfeldt, K; Su, K; Vaitheeswaran, V; Vaz, A; Weinberger, A J; Wyatt, M C

2015-01-01T23:59:59.000Z

303

NATURE BIOTECHNOLOGY VOLUME 24 NUMBER 5 MAY 2006 545 RNA synthetic biology  

E-Print Network [OSTI]

synthetic biology efforts have focused on engineering gene cir- cuits that rely on protein-DNA interactionsNATURE BIOTECHNOLOGY VOLUME 24 NUMBER 5 MAY 2006 545 RNA synthetic biology Farren J Isaacs1, Daniel two years efforts in synthetic biology have produced novel, synthetic RNA components capable

Collins, James J.

304

Meta-DNA: A DNA-Based Approach to Synthetic Harish Chandran1  

E-Print Network [OSTI]

Meta-DNA: A DNA-Based Approach to Synthetic Biology Harish Chandran1 harish@cs.duke.edu Nikhil Gopalkrishnan, Bernard Yurke, John Reif, Meta-DNA: Synthetic Biology via DNA Nanostructures and Hybridization@cs.duke.edu Abstract The goal of synthetic biology is to design and assemble synthetic systems that mimic bio- logical

Reif, John H.

305

Function of transcription termination factor .rho. in a model transcription system using synthetic DNA as template  

Science Journals Connector (OSTI)

Function of transcription termination factor .rho. in a model transcription system using synthetic DNA as template ...

Katsuya Shigesada; Mutsuo Imai

1982-11-01T23:59:59.000Z

306

Structure and Photoinduced Electron Transfer in Exceptionally Stable Synthetic DNA Hairpins with Stilbenediether Linkers  

Science Journals Connector (OSTI)

Structure and Photoinduced Electron Transfer in Exceptionally Stable Synthetic DNA Hairpins with Stilbenediether Linkers ...

Frederick D. Lewis; Xiaoyang Liu; Yangsheng Wu; Scott E. Miller; Michael R. Wasielewski; Robert L. Letsinger; Ruslan Sanishvili; Andrzej Joachimiak; Valentina Tereshko; Martin Egli

1999-10-13T23:59:59.000Z

307

Debris-less method and apparatus for forming apertures in hollow metallic articles  

DOE Patents [OSTI]

This invention is a method for forming an aperture in a wall of a hollow metallic article without introducing metallic debris therein. In a typical operation, an annular groove is formed in an exterior portion of the wall. The groove defines an annular wall segment, and the bottom of the groove is shaped to slope downwardly away from the segment to form a tapered annular web which connects the segment to the wall. Any suitable coupling is attached to the outer face of the segment, as by welding. Pull then is applied to the coupling to effect circumferential breakage of the web, thus forming a removable single-piece wall fragment consisting of the web and segment. The fragment and the coupling member attached thereto then are removed from the wall.

Jordan, C.L.; Chodelka, E.J.

1980-06-24T23:59:59.000Z

308

Improvement of the dynamic aperture in Chasman Green lattice design light source storage rings  

SciTech Connect (OSTI)

The Chasman-Green half cell illustrates a typical electron or positron storage ring lattice specifically designed for photon beams from undulators and wigglers located in each dispersion-free straight section. The need for a small particle beam emittance requires that the horizontal phase advance per cell should be in the neighborhood of 0.9 x 2 . Necessary chromaticity correcting sextupoles, S/sub D/ and S/sub F/, located in the dispersion straight section introduce non-linear perturbations which limit the dynamic aperture because of amplitude dependent tune shifts. Two families of sextupoles, S1 and S2, can be introduced into the dispersion-free region to moderate the more harmful effects of S/sub D/ and S/sub F/. The nature of the perturbations are discussed and some guidelines for the adjustment of S1 and S2 sextupoles are given.

Crosbie, E.A.

1987-01-01T23:59:59.000Z

309

Measurements of aperture and beam lifetime using movable beam scrapers in Indus-2 electron storage ring  

SciTech Connect (OSTI)

In this paper, the measurements of vertical and horizontal aperture which are available for stable beam motion in Indus-2 at beam energy 2.5 GeV using movable beam scrapers are presented. These beam scrapers are installed in one of the long straight sections in the ring. With the movement of beam scrapers towards the beam centre, the beam lifetime is measured. The beam lifetime data obtained from the movement of vertical and horizontal beam scrapers are analyzed. The contribution of beam loss due to beam-gas scattering (vacuum lifetime) and electron-electron scattering within a beam bunch (Touschek lifetime) is separated from the measured beam lifetime at different positions of the beam scrapers. Vertical and horizontal beam sizes at scrapers location are estimated from the scraper movement towards the beam centre in quantum lifetime limit and their values closely agree with measured value obtained using X-ray diagnostic beamline.

Kumar, Pradeep; Ghodke, A. D.; Karnewar, A. K.; Holikatti, A. C.; Yadav, S.; Puntambekar, T. A.; Singh, G. [Raja Ramanna Centre for Advanced Technology, Indore 452013 (India)] [Raja Ramanna Centre for Advanced Technology, Indore 452013 (India); Singh, P. [Bhabha Atomic Research Centre, Mumbai (India)] [Bhabha Atomic Research Centre, Mumbai (India)

2013-12-15T23:59:59.000Z

310

Dynamic aperture and performance of the SSC low energy booster lattice  

SciTech Connect (OSTI)

A systematic study of lattice designs proposed for the SSC Low Energy Booster has been performed, where the dynamic behavior of high transition gamma lattices is compared with that of a simpler FODO- like machine. After optimization of the transverse tunes, the dynamic aperture is determined by tracking the chromaticity corrected, ideal'' lattices, where the only sources on nonlinearity are the chromaticity sextupoles. The robustness of the lattices against misalignment, systematic and random errors is then evaluated and error compensation schemes worked out. The computational speed of the TEAPOT code has been greatly enhanced by porting and running its tracking core on the Intel iPSC/860 parallel computer. 7 refs., 5 figs., 3 tabs.

Pilat, F.; Bourianoff, G.; Cole, B.; Talman, R.; York, R.

1991-05-01T23:59:59.000Z

311

Automatic image analysis for detecting and quantifying gamma-ray sources in coded-aperture images  

SciTech Connect (OSTI)

The authors report the development of an automatic image analysis system that detects gamma-ray source regions in images obtained from a coded aperture, gamma-ray imager. The number of gamma sources in the image is not known prior to analysis. The system counts the number (K) of gamma sources detected in the image and estimates the lower bound for the probability that the number of sources in the image is K. The system consists of a two-stage pattern classification scheme in which the probabilistic neural network is used in the supervised learning mode. The algorithms were developed and tested using real gamma-ray images from controlled experiments in which the number and location of depleted uranium source disks in the scene are known. The novelty of the work lies in the creative combination of algorithms and the successful application of the algorithms to real images of gamma-ray sources.

Schaich, P.C.; Sengupta, S.K.; Ziock, K.P. [Lawrence Livermore National Lab., CA (United States)] [Lawrence Livermore National Lab., CA (United States); Clark, G.A. [Lawrence Livermore National Lab., CA (United States)] [Lawrence Livermore National Lab., CA (United States); [Univ. of California, Davis, CA (United States). Center for Image Processing and Integrated Computing

1996-08-01T23:59:59.000Z

312

Computer vision for detecting and quantifying gamma-ray sources in coded-aperture images  

SciTech Connect (OSTI)

The authors report the development of an automatic image analysis system that detects gamma-ray source regions in images obtained from a coded aperture, gamma-ray imager. The number of gamma sources in the image is not known prior to analysis. The system counts the number (K) of gamma sources detected in the image and estimates the lower bound for the probability that the number of sources in the image is K. The system consists of a two-stage pattern classification scheme in which the Probabilistic Neural Network is used in the supervised learning mode. The algorithms were developed and tested using real gamma-ray images from controlled experiments in which the number and location of depleted uranium source disks in the scene are known.

Schaich, P.C.; Clark, G.A.; Sengupta, S.K.; Ziock, K.P.

1994-11-02T23:59:59.000Z

313

Postoperative Irradiation of Gynecologic Malignancies: Improving Treatment Delivery Using Aperture-Based Intensity-Modulated Radiotherapy  

SciTech Connect (OSTI)

Purpose: To evaluate dosimetric and treatment delivery advantages of aperture-based intensity-modulated radiotherapy (AB-IMRT) for the treatment of patients receiving whole pelvic radiotherapy for gynecologic malignancies. Methods and Materials: Nineteen patients undergoing pelvic radiotherapy after resection of endometrial cancers were selected. A 45-Gy dose was prescribed to the target volume delineated on a planning CT scan. An in-house inverse planning system, Ballista, was used to develop a treatment plan using aperture-based multileaf collimator segments. This approach was compared with conventional four-field, enlarged four-field, and static beamlet-based IMRT (BB-IMRT) techniques in terms of target coverage, dose-volume histogram statistics for surrounding normal tissues, and numbers of segments and monitor units (MU). Results: Three quarters (76.4%) of the planning target volume received the prescription dose with conventional four-field plans. With adequate target coverage, the Ballista plans significantly reduced the volume of bowel and bladder irradiated at the prescribed dose (p < 0.001), whereas the two approaches provided equivalent results for the rectum (p 0.5). On the other hand, AB-IMRT and BB-IMRT plans showed only small differences in dose-volume histogram statistics of unknown clinical impact, whereas Ballista plan delivery required on average 73% and 59% fewer segments and MU, respectively. Conclusion: With respect to conventional techniques, AB-IMRT for the treatment of gynecologic malignancies provides dosimetric advantages similar to those with BB-IMRT but with clear treatment delivery improvements.

Nadeau, Sylvain [Departement de physique, de genie physique et d'optique, Universite Laval, Quebec, QC (Canada) and Departement de radio-oncologie et Centre de recherche de l'Hotel-Dieu de Quebec, Centre Hospitalier Universitaire de Quebec, Hotel-Dieu de Quebec, Quebec, QC (Canada)]. E-mail: sylvainn@rrsb.nb.ca; Bouchard, Myriam [Departement de radio-oncologie et Centre de recherche de l'Hotel-Dieu de Quebec, Centre Hospitalier Universitaire de Quebec, Hotel-Dieu de Quebec, Quebec, QC (Canada); Germain, Isabelle [Departement de radio-oncologie et Centre de recherche de l'Hotel-Dieu de Quebec, Centre Hospitalier Universitaire de Quebec, Hotel-Dieu de Quebec, Quebec, QC (Canada); Raymond, Paul-Emile [Departement de radio-oncologie et Centre de recherche de l'Hotel-Dieu de Quebec, Centre Hospitalier Universitaire de Quebec, Hotel-Dieu de Quebec, Quebec, QC (Canada); Beaulieu, Frederic [Departement de radio-oncologie et Centre de recherche de l'Hotel-Dieu de Quebec, Centre Hospitalier Universitaire de Quebec, Hotel-Dieu de Quebec, Quebec, QC (Canada); Beaulieu, Luc [Departement de physique, de genie physique et d'optique, Universite Laval, Quebec, QC (Canada); Departement de radio-oncologie et Centre de recherche de l'Hotel-Dieu de Quebec, Centre Hospitalier Universitaire de Quebec, Hotel-Dieu de Quebec, Quebec, QC (Canada); Roy, Rene [Departement de physique, de genie physique et d'optique, Universite Laval, Quebec, QC (Canada); Gingras, Luc [Departement de physique, de genie physique et d'optique, Universite Laval, Quebec, QC (Canada); Departement de radio-oncologie et Centre de recherche de l'Hotel-Dieu de Quebec, Centre Hospitalier Universitaire de Quebec, Hotel-Dieu de Quebec, Quebec, QC (Canada)

2007-06-01T23:59:59.000Z

314

Immiscible displacements in rough-walled fractures: Competition between roughening by random aperture variations and smoothing by in-plane curvature  

E-Print Network [OSTI]

Immiscible displacements in rough-walled fractures: Competition between roughening by random-walled fractures is controlled by the competition between random aperture variability which tends to roughen parameters: one that controls roughening the coefficient of variation of the aperture field, and another

Detwiler, Russell

315

Abstract--We have recently completed a large-area, coded-aperture, gamma-ray imager for use in searching for radiation  

E-Print Network [OSTI]

Abstract-- We have recently completed a large-area, coded- aperture, gamma-ray imager for use. The in- strument uses a rank-19, one-dimensional coded aperture to cast shadow patterns onto a 0.57 m2 Na sufficient radiation can reach a large gamma-ray detec- tor from a small source to make detection possible

Horn, Berthold K.P.

316

Granular flow through an aperture: Pressure and flow rate are independent. M. A. Aguirre1,2  

E-Print Network [OSTI]

REV IEW CO PY N O T FO R D ISTRIBU TIO N Granular flow through an aperture: Pressure and flow rate in the Physics and Mechanics of Fluids). 3 Instituto de F´isica de L´iquidos y Sistemas Biol´ogicos (UNLP, A. Calvo has passed away during the preparation stages of this article. We simultaneously measure

Paris-Sud XI, Université de

317

Velocity model-building by 3D frequency-domain, full-waveform inversion of wide-aperture seismic data  

E-Print Network [OSTI]

Velocity model-building by 3D frequency-domain, full-waveform inversion of wide-aperture seismic, any approach that helps to auto- mate and optimize velocity model-building will speed up the output . The most common approaches for building a PSDM velocity model rely on reflection traveltime tomography e

Vallée, Martin

318

April 1, 2000 / Vol. 25, No. 7 / OPTICS LETTERS 439 Anomaly in a high-numerical-aperture diffractive focusing lens  

E-Print Network [OSTI]

^x; sxsy 1 1 sz ^y; 2sx ^z . (2) The apodization factor Av is based on conservation of energy size at the focus reaches a minimum at a numerical aperture of 0.5 and then increases significantly lenses with low rather than high NA's can be analyzed by use of standard scalar theory, for which

Friesem, Asher A.

319

Electromagnetic Radiation (EMR) coupling to complex systems : aperture coupling into canonical cavities in reverberant and anechoic environments and model validation.  

SciTech Connect (OSTI)

Mode-stirred chamber and anechoic chamber measurements were made on two sets of canonical test objects (cylindrical and rectangular) with varying numbers of thin slot apertures. The shielding effectiveness was compared to determine the level of correction needed to compensate the mode-stirred data to levels commensurate with anechoic data from the same test object.

Charley, Dawna R.; Higgins, Matthew B.

2007-12-01T23:59:59.000Z

320

Measurement of fracture aperture fields using transmitted light: An evaluation of measurement errors and their influence on  

E-Print Network [OSTI]

Measurement of fracture aperture fields using transmitted light: An evaluation of measurement errors and their influence on simulations of flow and transport through a single fracture Russell L in fractures can be greatly enhanced through experimentation in transparent systems (analogs or replicas) where

Detwiler, Russell

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

Finding Large Aperture Fractures in Geothermal Resource Areas Using a Three-Component Long-Offset Surface Seismic Survey  

Broader source: Energy.gov [DOE]

DOE Geothermal Peer Review 2010 - Presentation. Project summary: Drilling into large aperture open fractures (LAFs) typically yield production wells with high productivity and low pressure drawdown. Developing geophysical and geologic techniques for identifying and precisely mapping LAFsin 3-D will greatly reduce dry hole risk and the overall number of wells required for reaching a particular geothermal field power capacity.

322

Sub-15 nm Photo-electron Source Using a Nano-aperture Integrated with a Nano-antenna  

Science Journals Connector (OSTI)

We propose a nano-scale C-aperture nano-tip photo-electron source with a CsBr photo-cathode. We fabricated the structure and estimated the optical spot available in the CsBr thin film...

Cheng, Yao-Te; Takashima, Yuzuru; Maldonado, Juan R; Scipioni, Larry; Ferranti, David; Pianetta, Piero A; Hesselink, Lambertus; Pease, Roger F

323

Imaging Structure With Fluid Fluxes At The Bradys Geothermal Field With  

Open Energy Info (EERE)

Imaging Structure With Fluid Fluxes At The Bradys Geothermal Field With Imaging Structure With Fluid Fluxes At The Bradys Geothermal Field With Satellite Interferometric Radar (Insar)- New Insights Into Reservoir Extent And Structural Controls Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Imaging Structure With Fluid Fluxes At The Bradys Geothermal Field With Satellite Interferometric Radar (Insar)- New Insights Into Reservoir Extent And Structural Controls Details Activities (1) Areas (1) Regions (0) Abstract: We present a new example of Interferometric Synthetic Aperture Radar's (InSAR) remarkable utility for defining an operating geothermal reservoir's lateral extent and hydrologically active fracture systems. InSAR reveals millimeter-level surface change due to volume change in the reservoir and overlying aquifer systems caused by fluid pressure reduction

324

Evaluation of the dosimetric properties of a synthetic single crystal diamond detector in high energy clinical proton beams  

SciTech Connect (OSTI)

Purpose: To investigate the dosimetric properties of a synthetic single crystal diamond Schottky diode for accurate relative dose measurements in large and small field high-energy clinical proton beams.Methods: The dosimetric properties of a synthetic single crystal diamond detector were assessed by comparison with a reference Markus parallel plate ionization chamber, an Exradin A16 microionization chamber, and Exradin T1a ion chamber. The diamond detector was operated at zero bias voltage at all times. Comparative dose distribution measurements were performed by means of Fractional depth dose curves and lateral beam profiles in clinical proton beams of energies 155 and 250 MeV for a 14 cm square cerrobend aperture and 126 MeV for 3, 2, and 1 cm diameter circular brass collimators. ICRU Report No. 78 recommended beam parameters were used to compare fractional depth dose curves and beam profiles obtained using the diamond detector and the reference ionization chamber. Warm-up/stability of the detector response and linearity with dose were evaluated in a 250 MeV proton beam and dose rate dependence was evaluated in a 126 MeV proton beam. Stem effect and the azimuthal angle dependence of the diode response were also evaluated.Results: A maximum deviation in diamond detector signal from the average reading of less than 0.5% was found during the warm-up irradiation procedure. The detector response showed a good linear behavior as a function of dose with observed deviations below 0.5% over a dose range from 50 to 500 cGy. The detector response was dose rate independent, with deviations below 0.5% in the investigated dose rates ranging from 85 to 300 cGy/min. Stem effect and azimuthal angle dependence of the diode signal were within 0.5%. Fractional depth dose curves and lateral beam profiles obtained with the diamond detector were in good agreement with those measured using reference dosimeters.Conclusions: The observed dosimetric properties of the synthetic single crystal diamond detector indicate that its behavior is proton energy independent and dose rate independent in the investigated energy and dose rate range and it is suitable for accurate relative dosimetric measurements in large as well as in small field high energy clinical proton beams.

Mandapaka, A. K.; Ghebremedhin, A.; Patyal, B. [Department of Radiation Medicine, Loma Linda University Medical Center, 11234 Anderson Street, Loma Linda, California 92354 (United States)] [Department of Radiation Medicine, Loma Linda University Medical Center, 11234 Anderson Street, Loma Linda, California 92354 (United States); Marinelli, Marco; Prestopino, G.; Verona, C.; Verona-Rinati, G. [INFNDipartimento di Ingegneria Industriale, Universit di Roma Tor Vergata, Via del Politecnico 1, 00133 Roma (Italy)] [INFNDipartimento di Ingegneria Industriale, Universit di Roma Tor Vergata, Via del Politecnico 1, 00133 Roma (Italy)

2013-12-15T23:59:59.000Z

325

Use of synthetic DNA in expression of foreign proteins  

Science Journals Connector (OSTI)

Synthetic \\{DNAs\\} and oligonucleotides, which can be prepared conveniently by combining chemical synthesis and enzymatic methods, have been used extensively in recombinant DNA research. Examples include total gene synthesis, probes for the isolation of specific genes from cDNA or genomic libraries, linkers containing specific restriction sites for cloning, primers for DNA and RNA sequencing, and primers for the construction of specific mutations (either deletion, insertion or point mutations) by oligonucleotide-directed site-specific mutagenesis. This article reviews recent advances in the chemical and enzymatic synthesis of oligo- and polynucleotides and the application of synthetic DNA to the expression of foreign proteins. The synthesis of genes, including structural genes and regulatory genes are reviewed. Oligonucleotide-directed site-specific mutagenesis and use of synthetic DNA to optimize foreign protein expression are also discussed.

Hansen M. Hsiung

1986-01-01T23:59:59.000Z

326

Integrating synthetic flood data for selection of regional frequency distribution  

Science Journals Connector (OSTI)

Regional frequency distributions are estimated using respective regional average coefficients of variance, skewness and kurtosis. The regional average coefficients may be significantly biased for a region with inadequate hydrometric data. The objective of this study is to select suitable regional frequency distributions in previously identified five hydrologic homogeneous regions of Nepalese territory with larger focus on data-scarce regions. Incorporation of synthetic flood data has been proposed in two hydrologic regions which have insufficient hydrometric data. A SimHyd rainfall runoff model was employed for the generation of synthetic flood data to augment hydrometric data inadequacy. Selection of best-fit regional frequency distribution was identified using L-moment ratio diagrams and goodness-of-fit measure. The selected distributions were tested by comparing observation and regional distribution factors at eight observation hydrometric sites. Incorporation of synthetic flood data enabled to reduce regional distribution factor error to 6% from that of 10%.

Binaya Kumar Mishra; Kaoru Takara

2014-01-01T23:59:59.000Z

327

Evaluation of synthetic aggregates for use in concrete  

E-Print Network [OSTI]

of synthetic aggregates may result in 4 irregular aggrege. te behavior with respect to those test procedures. Investigators at the Texas Transportation Institute have sug- g sted some new r. echniques to evaluate the synthet. ic ageregate. Some... in firing temperature and retention t5me, although pressure s1aking losses of all ag, regates were very low which indicated that the dehydration process of all aggro ates wa complete. 11. The NuOH test was able to detect the vari. ation of aggre- gate...

Ahmad, Hafizuddin

1970-01-01T23:59:59.000Z

328

Synthetic investigations into the hexasaccharide domain of landomycin A  

E-Print Network [OSTI]

. 1 Preparation of Disaccharide 14 Our synthetic schemes starts with the formation of the ct-linkage between L- rhodinose and D-olivose. Of the many available methods used to introduce 2-deoxy-ct- glycoside linkages, we chose to employ glycosyl.... 1 Preparation of Disaccharide 14 Our synthetic schemes starts with the formation of the ct-linkage between L- rhodinose and D-olivose. Of the many available methods used to introduce 2-deoxy-ct- glycoside linkages, we chose to employ glycosyl...

Kuo, Yu

2012-06-07T23:59:59.000Z

330

Physics Pathway: A Digital Library Filled with Synthetic Interviews*  

E-Print Network [OSTI]

Physics Pathway: A Digital Library Filled with Synthetic Interviews* Michael G. Christel-412-268-7796 sms@cs.cmu.edu Dean Zollman Department of Physics Kansas State University Manhattan, KS 66506 1-785-532-1619 dzollman@phys.ksu.edu ABSTRACT Physics Pathway is a digital library available through an Adobe Flash portal

Christel, Mike

331

Experimental pressure solution compaction of synthetic halite/calcite aggregates  

E-Print Network [OSTI]

Experimental pressure solution compaction of synthetic halite/calcite aggregates Sergey Zubtsova of weakening of sediment-like aggregates by addition of hard particles. Sieved mixtures of calcite and halite solution. The individual halite grains deform easily by pressure solution creep whereas calcite grains act

332

THE DEVELOPMENT OF NEW OR IMPROVED SYNTHETIC MATERIALS FROM CORN  

E-Print Network [OSTI]

of materials will diversify the market for corn and for wet- mill biorefineries." Jaffe said that the workTHE DEVELOPMENT OF NEW OR IMPROVED SYNTHETIC MATERIALS FROM CORN DERIVATIVES IS THE GOAL OF A PARTNERSHIP AMONG NJIT RESEARCHERS, THE IOWA CORN PROMOTION BOARD AND THE MID-ATLANTIC TECHNOLOGY, RESEARCH

Bieber, Michael

333

More U. S. , Canada synthetic rubber use seen  

SciTech Connect (OSTI)

According to M.J. Rhoad of the International Institute of Synthetic Rubber Producers Inc., the total U.S. and Canadian natural and synthetic rubber consumption will amount to (in thousands of metric tons/yr) 3385, 3305, 3855, and 4295 for 1979, 1980, 1985, and 1990, respectively, with synthetic rubber use increasing from an estimated 2.54 million metric tons/yr in 1979 to 3.27 million metric tons/yr by 1990, including an increase from 2.35 to 3.02 million metric tons/yr for the U.S. Rubber consumption for tires and tire products in the U.S. will increase at 2%/yr, with synthetic rubber accounting for 61.9% of the rubber used for tires in 1990, down from the 63.4% in 1979. In 1980, the decline in automobile and tire production will cause a 2.4% decline in new rubber consumption. During 1979-90, the amount of rubber used for nontire purposes will increase at 2.5%/yr.

Rhoad, M.J.

1980-02-04T23:59:59.000Z

334

September 16, 2011 Synthetic Biology Leads to Organic Learning  

E-Print Network [OSTI]

principles and mathematical modeling to the design and construction of biological parts, devices, and systems with applications in energy, medicine, and technology. www.bio.davidson -neutral2 1,000,000 gallons in 2008 #12;Synthetic Biology at Davidson College Building Bacterial Computers

Campbell, A. Malcolm

335

Susceptibility of Synthetic Long-Chain Alkylbenzenes to  

E-Print Network [OSTI]

Susceptibility of Synthetic Long-Chain Alkylbenzenes to Degradation in Reducing Marine Sediments R Sunrise Valley Drive, Reston, Virginia 20192 Received April 24, 2008. Revised manuscript received June 24, 2008. Accepted July 02, 2008. Long-chain alkylbenzenes (LCABs) synthesized for production

336

USING SYNTHETIC PLAYERS TO GENERATE WORKLOADS FOR NETWORKED MULTIPLAYER GAMES  

E-Print Network [OSTI]

that generates appropriate workloads for networked multiplayer games. Based on this framework, we have developed a software infrastructure and a prototype synthetic player for the multiplayer adventure game Crossfire Video games have been projected to continue to enjoy solid growth over the coming years (PricewaterhouseCoopers

Katchabaw, Michael James

337

MULTISPECTRAL SYNTHETIC SCENE GENERATION USING ATMOSPHERIC PROPAGATION AND THERMODYNAMIC MODELS  

E-Print Network [OSTI]

of the Central Intelligence Agency, the US Department of Energy, NASA's Jet Propulsion Laboratory, ITEK a requirement. This document represents the current status of a first-principles physics-based synthetic image behavior in a natural environment, and the propagation of energy through the atmosphere. The model

Salvaggio, Carl

338

Accelerator Quality HTS Dipole Magnet Demonstrator designs for the EuCARD-2, 5 Tesla 40 mm Clear Aperture Magnet  

E-Print Network [OSTI]

Future high-energy accelerators will need very high magnetic fields in the range of 20 T. The EuCARD-2 work-package-10 is a collaborative push to take HTS materials into an accelerator quality demonstrator magnet. The demonstrator will produce 5 T standalone and between 17 T and 20 T, when inserted into the 100 mm aperture of Fresca-2 high field out-sert magnet. The HTS magnet will demonstrate the field strength and field quality that can be achieved. An effective quench detection and protection system will have to be developed to operate with the HTS superconducting materials. This paper presents a ReBCO magnet design using multi strand Roebel cable that develops a stand-alone field of 5 T in a 40 mm clear aperture and discusses the challenges associated with good field quality using this type of material. A selection of magnet designs is presented as result of a first phase of development.

Kirby, G; Ballarino, A; Bottura, L; Chouika, N; Clement, S; Datskov, V; Fajardo, L; Fleiter, J; Gauthier, R; Lambert, L; Lopes, M; Perez, J; DeRijk, G; Rijllart, A; Rossi, L; Ten Kate, H; Durante, M; Fazilleau, P; Lorin, C; Haro, E; Stenvall, A; Caspi, S; Marchevsky, M; Goldacker, W; Kario, A

2014-01-01T23:59:59.000Z

339

Catalyst for splitting water &Catalyst for splitting water & Synthetic Modeling of InorganicSynthetic Modeling of Inorganic  

E-Print Network [OSTI]

Importance Hydrogen technology in fuel cellsHydrogen technology in fuel cells As a combustion fuel, it producesCatalyst for splitting water &Catalyst for splitting water & Synthetic Modeling of Inorganic of evolution ·Optimized catalyst for water splitting in all oxygenic phototrophs S0 S4 S1 S2 S3 O2 2 H O2 e- e

Petta, Jason

340

A machine that speeds up evolution is revolutionizing genome design A new tool for synthetic biology  

E-Print Network [OSTI]

Engineering (MAGE) The Principle of Accelerated Evolution · Synthetic DNA is repeatedy A new tool for synthetic biology We are in the midst of a genomic ("write") the DNA that makes up genomic information. However, current

Wood, Robert

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

Flourishing and Discordance: On Two Modes of Human Science Engagement with Synthetic Biology  

E-Print Network [OSTI]

single stranded synthetic DNA, the fact that ligation indo: putting a piece of synthetic DNA in a host. But I thinksynthetic biology was intensifying already-known challenges in recombinant DNA

Stavrianakis, Anthony

2012-01-01T23:59:59.000Z

342

Dynamics of Photoinduced Charge Separation and Charge Recombination in Synthetic DNA Hairpins with Stilbenedicarboxamide Linkers  

Science Journals Connector (OSTI)

Dynamics of Photoinduced Charge Separation and Charge Recombination in Synthetic DNA Hairpins with Stilbenedicarboxamide Linkers ... The dynamics of photoinduced charge separation and charge recombination in synthetic DNA hairpins have been investigated by means of femtosecond and nanosecond transient spectroscopy. ...

Frederick D. Lewis; Taifeng Wu; Xiaoyang Liu; Robert L. Letsinger; Scott R. Greenfield; Scott E. Miller; Michael R. Wasielewski

2000-03-14T23:59:59.000Z

343

Creating Protein Affinity Reagents by Combining Peptide Ligands on Synthetic DNA Scaffolds  

Science Journals Connector (OSTI)

Creating Protein Affinity Reagents by Combining Peptide Ligands on Synthetic DNA Scaffolds ... The peptides were conjugated to synthetic DNA (Table S4 and S5, SI) using standard amine coupling chemistry(23) (Scheme 1, SI). ...

Berea A. R. Williams; Chris W. Diehnelt; Paul Belcher; Matthew Greving; Neal W. Woodbury; Stephen A. Johnston; John C. Chaput

2009-11-06T23:59:59.000Z

344

Modular Design of Artificial Tissue Homeostasis: Robust Control through Synthetic Cellular Heterogeneity  

E-Print Network [OSTI]

Synthetic biology efforts have largely focused on small engineered gene networks, yet understanding how to integrate multiple synthetic modules and interface them with endogenous pathways remains a challenge. Here we present ...

Miller, Miles Aaron

345

High energy second-harmonic generation of Nd:glass laser radiation with large aperture CsLiB6O10 crystals  

Science Journals Connector (OSTI)

We have demonstrated the generation of a high-energy green laser pulse using large aperture CsLiB6O10 (CLBO) crystals for the first time to our knowledge. A pulsed energy of 25 J at...

Kiriyama, Hiromitsu; Inoue, Norihiro; Yamakawa, Koichi

2002-01-01T23:59:59.000Z

346

Finding Large Aperture Fractures in Geothermal Resource Areas Using A Three-Component Long-Offset Surface Seismic Survey, PSInSAR, and Kinematic Analysis  

Broader source: Energy.gov [DOE]

Fining Large Aperture Fractures in Geothermal Resource Areas Using A Three-Component Long-Offset Surface Seismic Survey, PSInSAR, and Kinematic Analysis presentation at the April 2013 peer review meeting held in Denver, Colorado.

347

Low-Resolution Reconstruction of a Synthetic DNA Holliday Junction Marcelo Nollmann,*y  

E-Print Network [OSTI]

Low-Resolution Reconstruction of a Synthetic DNA Holliday Junction Marcelo No¨llmann,*y W. Marshall

Nollmann, Marcelo

348

Method and apparatus for removing heat from electronic devices using synthetic jets  

DOE Patents [OSTI]

An apparatus for removing heat comprises a heat sink having a cavity, and a synthetic jet stack comprising at least one synthetic jet mounted within the cavity. At least one rod and at least one engaging structure to provide a rigid positioning of the at least one synthetic jet with respect to the at least one rod. The synthetic jet comprises at least one orifice through which a fluid is ejected.

Sharma, Rajdeep; Weaver, Jr., Stanton Earl; Seeley, Charles Erklin; Arik, Mehmet; Icoz, Tunc; Wolfe, Jr., Charles Franklin; Utturkar, Yogen Vishwas

2014-04-15T23:59:59.000Z

349

Electroporation of Synthetic DNA Antigens Offers Protection in Nonhuman Primates Challenged with Highly Pathogenic Avian Influenza Virus  

Science Journals Connector (OSTI)

...ANTIVIRAL AGENTS Electroporation of Synthetic DNA Antigens Offers Protection in...and in vivo electroporation of synthetic DNA-encoded antigens, we observed...recommendationvaccine.pdf . Electroporation of synthetic DNA antigens offers protection in...

Dominick J. Laddy; Jian Yan; Amir S. Khan; Hanne Andersen; Amanda Cohn; Jack Greenhouse; Mark Lewis; Jody Manischewitz; Lisa R. King; Hana Golding; Ruxandra Draghia-Akli; David B. Weiner

2009-02-11T23:59:59.000Z

350

Polymerase chain reaction and synthetic DNA probes: a means of distinguishing the causative agents of syphilis and yaws?  

Science Journals Connector (OSTI)

...Polymerase chain reaction and synthetic DNA probes: a means of distinguishing...Bilthoven, The Netherlands. Synthetic DNA probes specific for either the...Polymerase chain reaction and synthetic DNA probes: a means of distinguishing...

G T Noordhoek; B Wieles; J J van der Sluis; J D van Embden

1990-06-01T23:59:59.000Z

351

Synthetic DNA Replication Bubbles Bound and Unwound with Twofold Symmetry by a Simian Virus 40 T-Antigen Double Hexamer  

Science Journals Connector (OSTI)

ARTICLE ANIMAL VIRUSES Synthetic DNA Replication Bubbles Bound and...examined the binding of TAgDH to synthetic DNA replication bubbles. Tests of...characterized the binding and unwinding of synthetic DNA replication bubbles by the TAgDH...

Natalia V. Smelkova; James A. Borowiec

1998-11-01T23:59:59.000Z

352

Clinical Outcome of Adjuvant Treatment of Endometrial Cancer Using Aperture-Based Intensity-Modulated Radiotherapy  

SciTech Connect (OSTI)

Purpose: To assess disease control and acute and chronic toxicity with aperture-based intensity-modulated radiotherapy (AB-IMRT) for postoperative pelvic irradiation of endometrial cancer. Methods and Materials: Between January and July 2005, after hysterectomy for endometrial cancer, 15 patients received 45 Gy to the pelvis using AB-IMRT. The AB-IMRT plans were generated by an in-house treatment planning system (Ballista). The AB-IMRT plans were used for treatment and were dosimetrically compared with three other approaches: conventional four-field, enlarged four-field, and beamlet-based IMRT (BB-IMRT). Disease control and toxicity were prospectively recorded and compared with retrospective data from 30 patients treated with a conventional four-field technique. Results: At a median follow-up of 27 months (range, 23-30), no relapse was noted among the AB-IMRT group compared with five relapses in the control group (p = 0.1). The characteristics of each group were similar, except for the mean body mass index, timing of brachytherapy, and applicator type used. Patients treated with AB-IMRT experienced more frequent Grade 2 or greater gastrointestinal acute toxicity (87% vs. 53%, p 0.02). No statistically significant difference was noted between the two groups regarding the incidence or severity of chronic toxicities. AB-IMRT plans significantly improved target coverage (93% vs. 76% of planning target volume receiving 45 Gy for AB-IMRT vs. conventional four-field technique, respectively). The sparing of organs at risk was similar to that of BB-IMRT. Conclusion: The results of our study have shown that AB-IMRT provides excellent disease control with equivalent late toxicity compared with the conventional four-field technique. AB-IMRT provided treatment delivery and quality assurance advantages compared with BB-IMRT and could reduce the risk of second malignancy compared with BB-IMRT.

Bouchard, Myriam [Departement de Radio-oncologie et Centre de Recherche de L'Hotel-Dieu de Quebec, Centre Hospitalier Universitaire de Quebec, L'Hotel-Dieu de Quebec, Quebec, QC (Canada); Nadeau, Sylvain M.Sc.; Gingras, Luc [Departement de Radio-oncologie et Centre de Recherche de L'Hotel-Dieu de Quebec, Centre Hospitalier Universitaire de Quebec, L'Hotel-Dieu de Quebec, Quebec, QC (Canada); Departement de Physique, de Genie Physique et d'optique, Universite Laval, Quebec, QC (Canada); Raymond, Paul-Emile; Beaulieu, Frederic [Departement de Radio-oncologie et Centre de Recherche de L'Hotel-Dieu de Quebec, Centre Hospitalier Universitaire de Quebec, L'Hotel-Dieu de Quebec, Quebec, QC (Canada); Beaulieu, Luc [Departement de Radio-oncologie et Centre de Recherche de L'Hotel-Dieu de Quebec, Centre Hospitalier Universitaire de Quebec, L'Hotel-Dieu de Quebec, Quebec, QC (Canada); Departement de Physique, de Genie Physique et d'optique, Universite Laval, Quebec, QC (Canada); Fortin, Andre [Departement de Radio-oncologie et Centre de Recherche de L'Hotel-Dieu de Quebec, Centre Hospitalier Universitaire de Quebec, L'Hotel-Dieu de Quebec, Quebec, QC (Canada); Germain, Isabelle [Departement de Radio-oncologie et Centre de Recherche de L'Hotel-Dieu de Quebec, Centre Hospitalier Universitaire de Quebec, L'Hotel-Dieu de Quebec, Quebec, QC (Canada)], E-mail: isabelle.germain@chuq.qc.ca

2008-08-01T23:59:59.000Z

353

Meta-DNA: synthetic biology via DNA nanostructures and hybridization reactions  

Science Journals Connector (OSTI)

...articles 1004 181 131 18 Meta-DNA: synthetic biology via DNA nanostructures...protocols for its manipulation. Synthetic DNA is also cheaply and readily available...specific to mDNA and also occurs in synthetic DNA synthesis. One of the key technological...

2012-01-01T23:59:59.000Z

354

Discrete Assembly of Synthetic Peptide-DNA Triplex Structures from Polyvalent Melamine-Thymine Bifacial Recognition  

E-Print Network [OSTI]

Discrete Assembly of Synthetic Peptide-DNA Triplex Structures from Polyvalent Melamine decadeoxyoligothymi- dine (dT10) tracts to form triplexes with a peptide-DNA strand ratio of 1:2. The synthetic, synthetic melamine-displaying peptide 1 induced assembly of a peptide-DNA triplex structures

Bong, Dennis

355

Meta-DNA: Synthetic Biology via DNA Nanostructures and Hybridization Reactions  

E-Print Network [OSTI]

Meta-DNA: Synthetic Biology via DNA Nanostructures and Hybridization Reactions Harish Chandran University, Durham NC email: reif@cs.duke.edu Abstract The goal of synthetic biology is to design and assemble synthetic systems that mimic bio- logical systems. One of the most fundamental challenge

Reif, John H.

356

Comparison of genomic, plasmid, synthetic, and combined DNA probes for detecting Plasmodium falciparum DNA.  

Science Journals Connector (OSTI)

...pRepHind, and a 21-base-long synthetic DNA probe (PFR1), the sequence...second brief hybridization with synthetic DNA to amplify signals from samples...pRepHind, and a 21-base-long synthetic DNA probe (PFR1), the sequence...

G L McLaughlin; W E Collins; G H Campbell

1987-05-01T23:59:59.000Z

357

Dynamics of Photoinduced Charge Transfer and Hole Transport in Synthetic DNA Hairpins  

Science Journals Connector (OSTI)

Dynamics of Photoinduced Charge Transfer and Hole Transport in Synthetic DNA Hairpins ... The dynamics of photoinduced charge separation and charge recombination processes in synthetic DNA hairpins have been investigated by means of femtosecond transient absorption spectroscopy. ... for a family of synthetic DNA hairpins in which a stilbene dicarboxamide forms a bridge connecting two oligonucleotide arms. ...

Frederick D. Lewis; Robert L. Letsinger; Michael R. Wasielewski

2000-12-13T23:59:59.000Z

358

Development of natural and synthetic DNA probes for OXA-2 and TEM-1 beta-lactamases.  

Science Journals Connector (OSTI)

...Article Development of natural and synthetic DNA probes for OXA-2 and TEM-1...polymorphism. Development of natural and synthetic DNA probes for OXA-2 and TEM-1...5 Development of Natural and Synthetic DNA Probes for OXA-2 and TEM-1...

M Boissinot; J Mercier; R C Levesque

1987-05-01T23:59:59.000Z

359

A set of Macintosh computer programs for the design and analysis of synthetic genes  

Science Journals Connector (OSTI)

......are given for the creation of synthetic DNA sequences for the bovine prethrombin-2...are given for the creation of synthetic DNA sequences for the bovine prethrombin-2...are given for the creation of synthetic DNA sequences for the bovine prethrombin-2......

M. P. Weiner; H.A. Scheraga

1989-07-01T23:59:59.000Z

360

Fusion of multiple image types for the creation of radiometrically-accurate synthetic scenes  

E-Print Network [OSTI]

Fusion of multiple image types for the creation of radiometrically-accurate synthetic scenes-in-the-loop requirements for many aspects of synthetic hyperspectral scene construction. Through a fusion of 3D lidar data: lidar, hyperspectral, fusion, DIRSIG, building reconstruction, synthetic scene 1 INTRODUCTION Over

Kerekes, John

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

Effect of Synthetic Drilling Fluid Base Oils on Asphaltene Stability and Wetting in Sandstone Cores  

Science Journals Connector (OSTI)

Effect of Synthetic Drilling Fluid Base Oils on Asphaltene Stability and Wetting in Sandstone Cores ... In synthetic oil-based drilling fluids, diesel has been replaced, for environmental reasons, by base oils that are very low in aromatic hydrocarbons. ... Paraffinic and olefinic base oils used to make up some synthetic oil-based drilling muds can destabilize asphaltenes. ...

Yongsheng Zhang; Jianxin Wang; Norman R. Morrow; Jill S. Buckley

2005-03-18T23:59:59.000Z

362

Renewable Energy from Synthetic Biology (LBNL Science at the Theater)  

ScienceCinema (OSTI)

Jay Keasling, co-leader of Berkeley Lab's Helios Project, is a groundbreaking researcher in the new scientific field of synthetic biology. In Helios, he directs the biology program, incorporating a range of approaches to increasing the efficacy and economy of plants and cellulose-degrading microbes to make solar-based fuels. He is a UC Berkeley professor of Chemical and Bioengineering, and founder of Amyris Biotechnologies, a company that was honored as a Technology Pioneer for 2006 by the World Economic Forum. Keasling has succeeded in using synthetic biology to develop a yeast-based production scheme for precursors of the antimalarial drug artemisinin in work funded by the Bill & Melinda Gates Foundation.

Keasling, Jay

2011-04-28T23:59:59.000Z

363

Topologically Robust Transport of Photons in a Synthetic Gauge Field  

E-Print Network [OSTI]

Electronic transport in low dimensions through a disordered medium leads to localization. The addition of gauge fields to disordered media leads to fundamental changes in the transport properties. For example, chiral edge states can emerge in two-dimensional systems with a perpendicular magnetic field. Here, we implement a "synthetic'' gauge field for photons using silicon-on-insulator technology. By determining the distribution of transport properties, we confirm the localized transport in the bulk and the suppression of localization in edge states, using the "gold standard'' for localization studies. Our system provides a new platform to investigate transport properties in the presence of synthetic gauge fields, which is important both from the fundamental perspective of studying photonic transport and for applications in classical and quantum information processing.

Mittal, S; Faez, S; Migdall, A; Taylor, J M; Hafezi, M

2014-01-01T23:59:59.000Z

364

Synthetic nanotubes lay foundation for new technology: Artificial pores  

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

Synthetic nanotubes lay foundation for new technology: Artificial pores Synthetic nanotubes lay foundation for new technology: Artificial pores mimic key features of natural pores By Tona Kunz * July 17, 2012 Tweet EmailPrint Scientists have overcome key design hurdles to expand the potential uses of nanopores and nanotubes. The creation of smart nanotubes with selective mass transport opens up a wider range of applications for water purification, chemical separation and fighting disease. Nanopores and their rolled up version, nanotubes, consist of atoms bonded to each other in a hexagonal pattern to create an array of nanometer-scale openings or channels. This structure creates a filter that can be sized to select which molecules and ions pass into drinking water or into a cell. The same filter technique can limit the release of chemical by-products

365

A DNA Nanostructure Platform for Directed Assembly of Synthetic Vaccines  

Science Journals Connector (OSTI)

A DNA Nanostructure Platform for Directed Assembly of Synthetic Vaccines ... Here we report the design and synthesis of a 1,669-nucleotide, single-stranded DNA mol. ... These DL-DNAs induced greater amts. of tumor necrosis factor-? and interleukin-6 from RAW264.7 macrophage-like cells than did a mixt. of Y-DNA with the same sequences as the corresponding DL-DNA. ...

Xiaowei Liu; Yang Xu; Tao Yu; Craig Clifford; Yan Liu; Hao Yan; Yung Chang

2012-07-03T23:59:59.000Z

366

The stability and chemical modification of synthetically useful enzymes  

E-Print Network [OSTI]

THE STABILITY AND CHEMICAL MODIFICATION OF SYNTHETICALLY USEFUL ENZYMES A Thesis by GORDON LEE SMITH Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE... May 1988 Major Subject: Chemistry THE STABILITY AND CHEMICAL MODIFICATION OF STATICALLY USEFUL ENZYMES A Thesis by GORDON LEE SMITH Approved as to style and content by: Chi-Huey ong (Chairman of Committee) A. Ian Scott (Member) B. J...

Smith, Gordon Lee

2012-06-07T23:59:59.000Z

367

Synthetic Antimicrobial Oligomers Induce Composition-dependent Topological  

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

Synthetic Antimicrobial Oligomers Induce Synthetic Antimicrobial Oligomers Induce Composition-dependent Topological Transition in Membranes The development of bacterial resistance to conventional antibiotics is a major public health concern. For example, methicillin-resistant Staphylococcus aureus (MRSA), vancomycin-resistant enterococci (VRE) and Staphylococcus aureus (VRSA) have emerged as common nosocomial (hospital-originating) infections. Circumvention of such resistance may be possi ble by emulating host defense antimicrobial peptides (AMP's), which are found in a broad range of species and have broad-spectrum antimicrobial properties. These AMP's have two structural motifs in common: they are cationic and amphipathic. It is thought that electro static interactions facilitate association of the peptide with the anionic bacterial membrane and amphiphilic interactions act to form pores in the bacterial membrane, leading to cell death. Thus, AMP's target generic characteristics common to the mem branes of many pathogenic species, and resistance to such natural defences evolves much more slowly than for conventional antibiotics. The exact molecular mechanisms by which membrane pores are formed are still not fully understood, although three major models ('barrel-stave', 'toroidal pore', 'carpet') have been proposed. Moreover, these models do not ex haustively cover all possibilities, as AMP activity is not always correlated with the loss of a permeability barrier. Understanding the structural tenden cies generated in antimicrobial-membrane interactions is an essential step to elucidating such molecular mechanisms and therefore to the pre dictive design of synthetic AMP analogs.

368

Better practices and synthetic fluid improve drilling rates  

SciTech Connect (OSTI)

Improved drilling practices, combined with the use of olefin-based synthetic drilling fluids, have dramatically reduced drilling time and costs in a difficult drilling area in the Gulf of Mexico. In the South Pass area, Marathon Oil Co. and other operators have had wells with long drilling times and high costs. In addition to the two wells with record penetration rates, routine drilling rates have also increased from the use of synthetic mud and careful drilling practices. Through application of these improved drilling practices, 2,000--3,000 ft/day can be drilled routinely. Marathon achieves this goal by applying the experience gained on previous wells, properly training and involving the crews, and using innovative drilling systems. Improved drilling practices and systems are just one part of successful, efficient drilling. Rig site personnel are major contributors to safely and successfully drilling at high penetration rates for extended periods. The on site personnel must act as a team and have the confidence and proper mental attitude about what is going on downhole. The paper describes the drilling history in the South Pass area, the synthetic drilling fluid used, cuttings handling, hole cleaning, drilling practices, bottom hole assemblies, and lost circulation.

White, W. (Marathon Oil Co., Lafayette, LA (United States)); McLean, A.; Park, S. (M-I Drilling Fluids, Houston, TX (United States))

1995-02-20T23:59:59.000Z

369

Formulation of soluble oils with synthetic and petroleum sulfonates  

SciTech Connect (OSTI)

Metalworking fluids for metal removal are formulated to provide cooling, lubrication, and rust protection when cutting and machining metals. There are basically four types of cutting fluids: straight oils, synthetics, semisynthetic fluids and soluble oils. The last type is the most widely used for metal removal operations such as cutting, drilling and grinding. Soluble oils used for metalworking operations are normally the oil-in-water type, with oil as the internal phase and water as the external phase. The soluble oils can have rather complex compositions, usually containing two or more emulsifiers and coupling agents, as well as additives to provide rust inhibition, lubricity, detergency, resistance to bacterial attack and foam control. The dominant emulsifier in a soluble oil is usually sodium sulfonate which also has the secondary benefit of being a rust inhibitor. Soluble oil emulsions based on petroleum or synthetic sulfonates have been found to improve lubrication and cleaning of metal parts and equipment. As has been done previously, a series of emulsification studies were conducted using petroleum and synthetic sulfonates. Emulsifier level, coemulsifiers and minor formulation adjustments were made to optimize each system. This study was made using naphthenic oil basestock. Formulations were evaluated using criteria including concentrate stability, hard and soft water emulsion stability, emulsibility, foaming tendency and response to defoamers, antirust properties and cost effectiveness of individual formulations. The results of these evaluations are presented in the present paper.

Eckard, A.; Riff, I.; Weaver, J. [Witco Corp., Oakland, NJ (United States)

1997-06-01T23:59:59.000Z

370

Method for producing and regenerating a synthetic CO[sub 2] acceptor  

DOE Patents [OSTI]

A method is described for producing a synthetic CO[sub 2] acceptor by feeding a mixture of finely divided silica and at least one finely divided calcium compound selected from the group consisting of calcium oxide and calcium carbonate to a fluidized bed; operating the fluidized bed at suitable conditions to produce pellets of synthetic CO[sub 2] acceptor and recovering the pellets of synthetic CO[sub 2] acceptor from the fluidized bed. Optionally, spent synthetic CO[sub 2] acceptor can be charged to the fluidized bed to produce regenerated pellets of synthetic CO[sub 2] acceptor. 1 fig.

Lancet, M. S.; Curran, G. P.; Gorin, E.

1982-05-18T23:59:59.000Z

371

Method for producing and regenerating a synthetic CO.sub.2 acceptor  

DOE Patents [OSTI]

A method for producing a synthetic CO.sub.2 acceptor by feeding a mixture of finely divided silica and at least one finely divided calcium compound selected from the group consisting of calcium oxide and calcium carbonate to a fluidized bed; operating the fluidized bed at suitable conditions to produce pellets of synthetic CO.sub.2 acceptor and recovering the pellets of synthetic CO.sub.2 acceptor from the fluidized bed. Optionally, spent synthetic CO.sub.2 acceptor can be charged to the fluidized bed to produce regenerated pellets of synthetic CO.sub.2 acceptor.

Lancet, Michael S. (Pittsburgh, PA); Curran, George P. (Pittsburgh, PA); Gorin, Everett (San Rafael, CA)

1982-01-01T23:59:59.000Z

372

Multiphase Fluid Flow in Deformable Variable-Aperture Fractures - Final Report  

SciTech Connect (OSTI)

Fractures provide flow paths that can potentially lead to fast migration of fluids or contaminants. A number of energy-?related applications involve fluid injections that significantly perturb both the pressures and chemical composition of subsurface fluids. These perturbations can cause both mechanical deformation and chemical alteration of host rocks with potential for significant changes in permeability. In fractured rock subjected to coupled chemical and mechanical stresses, it can be difficult to predict the sign of permeability changes, let alone the magnitude. This project integrated experimental and computational studies to improve mechanistic understanding of these coupled processes and develop and test predictive models and monitoring techniques. The project involved three major components: (1) study of two-?phase flow processes involving mass transfer between phases and dissolution of minerals along fracture surfaces (Detwiler et al., 2009; Detwiler, 2010); (2) study of fracture dissolution in fractures subjected to normal stresses using experimental techniques (Ameli, et al., 2013; Elkhoury et al., 2013; Elkhoury et al., 2014) and newly developed computational models (Ameli, et al., 2014); (3) evaluation of electrical resistivity tomography (ERT) as a method to detect and quantify gas leakage through a fractured caprock (Breen et al., 2012; Lochbuhler et al., 2014). The project provided support for one PhD student (Dr. Pasha Ameli; 2009-?2013) and partially supported a post-?doctoral scholar (Dr. Jean Elkhoury; 2010-?2013). In addition, the project provided supplemental funding to support collaboration with Dr. Charles Carrigan at Lawrence Livermore National Laboratory in connection with (3) and supported one MS student (Stephen Breen; 2011-?2013). Major results from each component of the project include the following: (1) Mineral dissolution in fractures occupied by two fluid phases (e.g., oil-?water or water-?CO{sub 2}) causes changes in local capillary forces and redistribution of fluids. These coupled processes enhance channel formation and the potential for development of fast flow paths through fractures. (2) Dissolution in fractures subjected to normal stress can result in behaviors ranging from development of dissolution channels and rapid permeability increases to fracture healing and significant permeability decreases. The timescales associated with advective transport of dissolved ions in the fracture, mineral dissolution rates, and diffusion within the adjacent porous matrix dictate the sign and magnitude of the resulting permeability changes. Furthermore, a high-? resolution mechanistic model that couples elastic deformation of contacts and aperture-?dependent dissolution rates predicts the range of observed behaviors reasonably well. (3) ERT has potential as a tool for monitoring gas leakage in deep formations. Using probabilistic inversion methods further enhances the results by providing uncertainty estimates of inverted parameters.

Detwiler, Russell

2014-04-30T23:59:59.000Z

373

Developing Magnetorheological Finishing (MRF) Technology for the Manufacture of Large-Aperture Optics in Megajoule Class Laser Systems  

SciTech Connect (OSTI)

Over the last eight years we have been developing advanced MRF tools and techniques to manufacture meter-scale optics for use in Megajoule class laser systems. These systems call for optics having unique characteristics that can complicate their fabrication using conventional polishing methods. First, exposure to the high-power nanosecond and sub-nanosecond pulsed laser environment in the infrared (>27 J/cm{sup 2} at 1053 nm), visible (>18 J/cm{sup 2} at 527 nm), and ultraviolet (>10 J/cm{sup 2} at 351 nm) demands ultra-precise control of optical figure and finish to avoid intensity modulation and scatter that can result in damage to the optics chain or system hardware. Second, the optics must be super-polished and virtually free of surface and subsurface flaws that can limit optic lifetime through laser-induced damage initiation and growth at the flaw sites, particularly at 351 nm. Lastly, ultra-precise optics for beam conditioning are required to control laser beam quality. These optics contain customized surface topographical structures that cannot be made using traditional fabrication processes. In this review, we will present the development and implementation of large-aperture MRF tools and techniques specifically designed to meet the demanding optical performance challenges required in large-aperture high-power laser systems. In particular, we will discuss the advances made by using MRF technology to expose and remove surface and subsurface flaws in optics during final polishing to yield optics with improve laser damage resistance, the novel application of MRF deterministic polishing to imprint complex topographical information and wavefront correction patterns onto optical surfaces, and our efforts to advance the technology to manufacture large-aperture damage resistant optics.

Menapace, J A

2010-10-27T23:59:59.000Z

374

InSAR | Open Energy Information  

Open Energy Info (EERE)

InSAR InSAR Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: InSAR Details Activities (11) Areas (10) Regions (2) NEPA(0) Exploration Technique Information Exploration Group: Remote Sensing Techniques Exploration Sub Group: Active Sensors Parent Exploration Technique: Radar Information Provided by Technique Lithology: Stratigraphic/Structural: Geophysical Monitoring Hydrological: Can give indications about subsurface geothermal fluid flow Thermal: Dictionary.png InSAR: Interferometric Synthetic Aperture Radar (InSAR) is a remote sensing technique that can be used to accurately measure ground displacement. Other definitions:Wikipedia Reegle Introduction InSAR is a radar technique used in geodesy and remote sensing. This geodetic method uses two or more synthetic aperture radar (SAR) images to

375

Highly Sensitive in Vitro Selections for DNA-Linked Synthetic Small Molecules with Protein Binding Affinity and Specificity  

E-Print Network [OSTI]

Highly Sensitive in Vitro Selections for DNA-Linked Synthetic Small Molecules with Protein Binding oligonucleotides to corresponding synthetic molecules, either as a consequence of DNA-templated organic synthesis3 or as a result of conjugating DNA to synthetic molecules, in theory enables synthetic molecules to satisfy

Liu, David R.

376

Automating the purification and isolation of synthetic DNA  

SciTech Connect (OSTI)

The authors describe the application of robotics to the purification and isolation of synthetic oligodeoxyribunucleotides. Starting with commercially available components, they have designed and programmed a robot based system that can isolate oligonucleotides from polyacrylamide gel slices, prepare oligonucleotides for purification by polyacrylamide gel electrophoresis and execute a rapid purification protocol on a disposable C-18 reverse phase column. Each operation has been fully automated, including evaporative centrifugation, such that the system can execute any two procedures simultaneously with a throughput of 12 samples in about six hours.

Jones, S.S.; Brown, J.E.; Vanstone, D.A.; Stone, D.K.; Brown, E.L.

1987-01-01T23:59:59.000Z

377

Fate of Mercury in Synthetic Gypsum Used for Wallboard Production  

SciTech Connect (OSTI)

This report presents and discusses results from the project 'Fate of Mercury in Synthetic Gypsum Used for Wallboard Production', performed at five different full-scale commercial wallboard plants. Synthetic gypsum produced by wet flue gas desulfurization (FGD) systems on coal-fired power plants is commonly used in the manufacture of wallboard. This practice has long benefited the environment by recycling the FGD gypsum byproduct, which is becoming available in increasing quantities, decreasing the need to landfill this material, and increasing the sustainable design of the wallboard product. However, new concerns have arisen as recent mercury control strategies involve the capture of mercury in FGD systems. The objective of this study has been to determine whether any mercury is released into the atmosphere at wallboard manufacturing plants when the synthetic gypsum material is used as a feedstock for wallboard production. The project has been co-funded by the U.S. DOE National Energy Technology Laboratory (Cooperative Agreement DE-FC26-04NT42080), USG Corporation, and EPRI. USG Corporation is the prime contractor, and URS Group is a subcontractor. The project scope included seven discrete tasks, each including a test conducted at various USG wallboard plants using synthetic gypsum from different wet FGD systems. The project was originally composed of five tasks, which were to include (1) a base-case test, then variations representing differing power plant: (2) emissions control configurations, (3) treatment of fine gypsum particles, (4) coal types, and (5) FGD reagent types. However, Task 5,could not be conducted as planned and instead was conducted at conditions similar to Task 3. Subsequently an opportunity arose to test gypsum produced from the Task 5 FGD system, but with an additive expected to impact the stability of mercury, so Task 6 was added to the project. Finally, Task 7 was added to evaluate synthetic gypsum produced at a power plant from an additional coal type. In the project, process stacks in the wallboard plant were sampled using the Ontario Hydro method. In every task, the stack locations sampled included a gypsum dryer and a gypsum calciner. In Tasks 1 and 4 through 7, the stack of the dryer for the wet wallboard product was also tested. Also at each site, in-stream process samples were collected and analyzed for mercury concentration before and after each significant step in wallboard production. These results and process data were used to construct mercury mass balances across the wallboard plants. The results from the project showed a wide range of percentage mercury losses from the synthetic gypsum feedstocks as measured by the Ontario Hydro method at the process stacks, ranging from 2% to 55% of the mercury in the gypsum feedstock. For the tasks exceeding 10% mercury loss across the wallboard plant, most of the loss occurred across the gypsum calciner. When total wallboard emissions remained below 10%, the primary emission location varied with a much less pronounced difference in emission between the gypsum dryer, calciner and board dryer. For all seven tasks, the majority of the mercury emissions were measured to be in the elemental form (Hg{sup 0}). Overall, the measured mercury loss mass rates ranged from 0.01 to 0.17 grams of mercury per dry ton of synthetic gypsum processed, or 0.01 to 0.4 pounds of mercury released per million square feet of wallboard produced from synthetic gypsum. The Coal Combustion Product Production and Use Survey from the American Coal Ash Association (ACAA) indicate that 7,579,187 short tons of synthetic gypsum were used for wallboard production in 2006. Extrapolating the results of this study to the ACAA industry usage rate, we estimate that mercury releases from wallboard production plants in 2006 ranged between 150 to 3000 pounds for the entire U.S. wallboard industry. With only seven sets of wallboard plant measurements, it is difficult to draw firm conclusions about what variables impact the mercury loss percentages across the wallboard plants. One significant o

Jessica Sanderson

2007-12-31T23:59:59.000Z

378

Frequency domain computation of synthetic vertical seismic profiles  

E-Print Network [OSTI]

, and the artifacts in the time function. The algorithm fails when the total attenuation xfx/Qv is so large that underflow occurs. For this model and multi-precision computation the failure point of the algorithm occurs when sfx/Qv is about 30. Synthetic VSPs were... in Figure 6c. The relative amplitude between events Al and A2 at interface 1 has been checked against the theoretical expression: Amp(A2)/Amp(A') = [(r /r )-r r ]exp[ (~f0/Qv)2x] = -1. 2693 exp(-0. 050265f ). 0 (28) This formula is the exact expression...

Wu, Ru-Chuan

2012-06-07T23:59:59.000Z

379

Multiphase Flow in Complex Fracture Apertures Under a Wide Range of Flow Conditions  

SciTech Connect (OSTI)

The summary below is an update of our previous progress report of June, 2003. That previous progress report, which was submitted as a PDF document, is not recorded on the RIMS website but will appear on the EMSP website. Our recent results are in the following areas: (1) Single-component flow through a rough-walled fracture to validate our methods, we have simulated slow single-component fluid flow through a geometry taken from analogous laboratory experiments. The permeability of this fracture is studied as the direction of the driving force is changed. We find that the lattice-Boltzmann method agrees with the experimental data and with previous numerical efforts. Additionally, flow enhancement compared to the well-known cubic law is observed in certain directions, i.e., the direction in which channels are most strongly correlated. Conversely, flow inhibition is observed in the perpendicular direction. Fluid flow appears to follow the correlated channels. We are currently extending these studies to higher Reynolds numbers where classical approximations based on assumptions of slow creeping flow are no longer valid. (2) Capillary rise in simple and complex geometries Capillary rise is studied using the lattice-Boltzmann method. The geometries used are a circular tube, a rectangular tube, and a fracture between two rough walls. The capillary rise height and the shape of the interface is studied as a function of the size of the tube, the wetting tendency of the walls, the surface tension, and the magnitude of an applied body force. In performing this study we discovered a technical problem with the lattice-Boltzmann method: it exhibited lattice pinning. This pinning created two significant problems: the entrapment of small bubbles and a history dependence of the contact angle. We solved these problems by modifying our algorithm so that it now allows interfaces to move at a smaller velocity. The new method practically removes all effects of lattice pinning. For the case of rectangular tubes, we have shown that the shape of the interface follows theoretical predictions and that the pressure drop across the interface obeys Laplace's law. Consequently our improved method solves a significant problem encountered in lattice-Boltzmann simulations of drainage and imbibition. We are presently pursuing analogous studies in more complex geometries. (3) Macroscopic laws for two-component fluid flow through rough fractures. Macroscopic two-phase flow through porous media is commonly approximated by a generalization of Darcy's law, wherein ''relative permeability's'' represent the mobility of wetting and non-wetting fluids. We have recently begun studying the applicability of this approximation for two-phase flow through rough-walled fractures. We find that when the nonwetting fluid is unconnected it can become trapped in tight geometries. Once forcing exceeds a certain capillary threshold the non-wetting fluid starts to move again. This capillary threshold depends on the roughness of the fracture surface and the size of the fracture aperture. Further simulations are being performed to better specify these dependencies along with the relationship of relative permeability to fracture roughness. (4) Multiple relaxation-time lattice-Boltzmann method. We are exploring ways to use the lattice-Boltzmann method in a rectangular lattice with different spacing in one direction. This idea is motivated by the fact that self-affine fracture surfaces exhibit different scaling perpendicular to the plane of the fracture than they exhibit in the plane. Therefore, allowing different lattice spacing in the different directions should greatly increase the efficiency of our simulations. We also seek a practical way of solving a well-known problem that derives from using the ''bounce-back'' method to approximate no-slip boundary conditions. We are pursuing a new generalization of the ''multiple relaxation time generalized lattice-Boltzmann method'' and are in the process of implementing it. (5) Study of thermal fluctuations of fluid-fluid interfaces. We hav

Rothman, Daniel H.

2003-06-01T23:59:59.000Z

380

Synthetic Generation of Social Network Data With Endorsements  

E-Print Network [OSTI]

In many simulation studies involving networks there is the need to rely on a sample network to perform the simulation experiments. In many cases, real network data is not available due to privacy concerns. In that case we can recourse to synthetic data sets with similar properties to the real data. In this paper we discuss the problem of generating synthetic data sets for a certain kind of online social network, for simulation purposes. Some popular online social networks, such as LinkedIn and ResearchGate, allow user endorsements for specific skills. For each particular skill, the endorsements give rise to a directed subgraph of the corresponding network, where the nodes correspond to network members or users, and the arcs represent endorsement relations. Modelling these endorsement digraphs can be done by formulating an optimization problem, which is amenable to different heuristics. Our construction method consists of two stages: The first one simulates the growth of the network, and the second one solves ...

Prez-Ross, Hebert

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

Synthesis, Structure, and Photochemistry of Exceptionally Stable Synthetic DNA Hairpins with Stilbene Diether Linkers  

Science Journals Connector (OSTI)

Synthesis, Structure, and Photochemistry of Exceptionally Stable Synthetic DNA Hairpins with Stilbene Diether Linkers ... Bis(oligonucleotide) conjugates with synthetic linkers connecting short complementary oligonucleotides are known to form synthetic DNA or RNA hairpins which are, in some cases, more stable than natural hairpins possessing nucleotide linkers.1 Letsinger and Wu2 reported the use of a stilbenedicarboxamide (Sa, Chart 1) linker which formed stable hairpin structures possessing as few as three T:A or two G:C base pairs. ... The ability of the Sa linker to serve as an electron acceptor has been exploited in our studies of hole injection and migration processes in synthetic DNA hairpins. ...

Frederick D. Lewis; Yansheng Wu; Xiaoyang Liu

2002-09-21T23:59:59.000Z

382

E-Print Network 3.0 - atp synthetic flux Sample Search Results  

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

flux Search Powered by Explorit Topic List Advanced Search Sample search results for: atp synthetic flux Page: << < 1 2 3 4 5 > >> 1 A genetically encoded fluorescent reporter...

383

Feasibility of Steam Hydrogasification of Microalgae for Production of Synthetic Fuels  

E-Print Network [OSTI]

Gasifier Intermediate products Low Energy Gas Final product Power Steam Gas Synthetic Liquids Spark and diesel engines Process Heat & Power Medium &

Suemanotham, Amornrat

2014-01-01T23:59:59.000Z

384

Effect of synthetic conditions on the properties of methyltrimethoxysilane-based aerogels  

Science Journals Connector (OSTI)

The effect of synthetic conditions on the properties of methyltrimethoxysilane-based aerogels is reported. All of the aerogels are hydrophobic and can efficiently adsorb organic...

S. A. Lermontov; N. A. Sipyagina; A. N. Malkova

2014-12-01T23:59:59.000Z

385

Use of Waste Materials from the Production of Synthetic Rubber for Preparing Aluminosilicate Ceramics  

Science Journals Connector (OSTI)

An aluminum-silicon-chromium powder (ASC) extracted from waste gases in synthetic rubber production is used as an addition to kaolin-...

V. N. Antsiferov; T. S. Golodnova; S. E. Porozova

2002-09-01T23:59:59.000Z

386

A new technology for producing synthetic liquid hydrocarbons from gaseous hydrocarbons  

Science Journals Connector (OSTI)

Conventional technologies of synthetic liquid fuels (SLF) production from gaseous hydrocarbons by producing synthesis ... liquid hydrocarbons are examined. A high-efficiency SLF production technology that allows ...

D. L. Astanovskii; L. Z. Astanovskii; A. L. Lapidus

2012-09-01T23:59:59.000Z

387

Uncertainty in synthetic biology for release and possibilities for regulation under the Toxic Substances Control Act  

E-Print Network [OSTI]

The emerging field of synthetic biology is developing rapidly and promises diverse applications. Many anticipated applications, particularly those involving release of engineered microbes into the environment or human ...

Lightfoot, Shlomiya

2014-01-01T23:59:59.000Z

388

Fate of Mercury in Synthetic Gypsum Used for Wallboard Production  

SciTech Connect (OSTI)

This report presents and discusses results from Task 6 of the study 'Fate of Mercury in Synthetic Gypsum Used for Wallboard Production,' performed at a full-scale commercial wallboard plant. Synthetic gypsum produced by wet flue gas desulfurization (FGD) systems on coal-fired power plants is commonly used in the manufacture of wallboard. This practice has long benefited the environment by recycling the FGD gypsum byproduct, which is becoming available in increasing quantities, decreasing the need to landfill this material, and increasing the sustainable design of the wallboard product. However, new concerns have arisen as recent mercury control strategies involve the capture of mercury in FGD systems. The objective of this study is to determine whether any mercury is released into the atmosphere when the synthetic gypsum material is used as a feedstock for wallboard production. The project is being co-funded by the U.S. DOE National Energy Technology Laboratory (Cooperative Agreement DE-FC26-04NT42080), USG Corporation, and EPRI. USG Corporation is the prime contractor, and URS Group is a subcontractor. The project scope now includes six discrete tasks, each conducted at various USG wallboard plants using synthetic gypsum from different FGD systems. The project was originally composed of five tasks, which were to include (1) a baseline test, then variations representing differing power plant: (2) emissions control configurations, (3) treatment of fine gypsum particles, (4) coal types, and (5) FGD reagent types. However, Task 5, which was to include testing with an alternate FGD reagent, could not be conducted as planned. Instead, Task 5 was conducted at conditions similar to Task 3, although with gypsum from an alternate FGD system. Subsequent to conducting Task 5 under these revised conditions, an opportunity arose to test gypsum produced at the same FGD system, but with an additive (Degussa Corporation's TMT-15) being used in the FGD system. TMT-15 was expected to impact the stability of mercury in synthetic gypsum used to produce wallboard, so Task 6 was added to the project to test this theory. In this project, process stacks in the wallboard plant have been sampled using the Ontario Hydro method. For every task, the stack locations sampled have included a dryer for the wet gypsum as it enters the plant and a gypsum calciner. For Tasks 1, 4, 5 and 6, the stack of the dryer for the wet wallboard product was also tested. Also at each site, in-stream process samples were collected and analyzed for mercury concentration before and after each significant step in wallboard production. The Ontario Hydro results, process sample mercury concentration data, and process data were used to construct mercury mass balances across the wallboard plants. Task 6 was conducted at a wallboard plant processing synthetic gypsum from a power plant that fires Eastern bituminous coal. The power plant has a single-loop, open spray tower limestone forced oxidation FGD system, with the forced oxidation conducted in the reaction tank integral with the FGD absorber. The FGD system has gypsum fines blow down as part of the dewatering step. The power plant is equipped with a selective catalytic reduction (SCR) system for NOX emissions control, and the SCR was in service during the time period the gypsum tested was produced. Also, as mentioned above, Degussa additive TMT-15 was being added to the FGD system when this gypsum was produced. The results of the Task 6 stack testing, as measured by the Ontario Hydro method, detected that an average of 55% of the incoming mercury was emitted during wallboard production. These losses were distributed as about 4% across the dryer mill, 6% across the board dryer kiln, and 45% across the kettle calciner. Emissions were similar to what Task 5 results showed on a percentage basis, but about 30% lower on a mass basis. The same power plant FGD system produced the synthetic gypsum used in Task 5 (with no use of TMT-15) and in Task 6 (with TMT-15 added to the FGD system). The lower emissions on a mass basis appeared

Jessica Sanderson; Gary M. Blythe; Mandi Richardson

2006-12-01T23:59:59.000Z

389

Ultrasonic nondestructive inspection of solid objects Tadeusz Stepinski  

E-Print Network [OSTI]

methods based on synthetic aperture concept (SAFT) is given and illustrated with experimental results

390

Improved practices, synthetic mud drive record 24-hr drilling  

SciTech Connect (OSTI)

Revised and improved drilling practices resulted in increased rate of penetration (ROP), improved hole cleaning, decreased circulating time, fewer instances of stuck pipe and reduced total drilling days. Rig equipment modifications and optimized techniques, combined with olefin-based synthetic fluid, produced significant efficiency improvements and cost reductions. Total-project strategy allows best technologies to be used, even if they are not low bid. In the Gulf of Mexico, a total-project concept helped Marathon drill back-to-back record 24-hr footages. Methods and philosophy described in this article allow drillers to choose optimum technologies, tools, materials and service performance for achieving optimum or lowest cost per foot rather than always using low bid.

Collins, G.J. [Marathon Oil Co., Houston, TX (United States); White, W.W. [Marathon Oil Co., Lafayette, LA (United States)

1995-05-01T23:59:59.000Z

391

Synthetic fuels technology overview with health and environmental impacts  

SciTech Connect (OSTI)

An introduction is presented to the following synthetic fuels technologies: (1) the Lurgi gasification of coal (2) the Fischer-Tropsch liquefaction of coal (3) coal-methanol conversion (4) donor solvent gas liquefaction (5) Tosco surface shale retorting ethanol production from coal and (6) the coal-methanol-gasoline conversion process. After establishing the system characteristics of these six technologies, consideration is given to their potential major health, safety, environmental and socio-economic impacts at the global, regional and local levels. It is determined that the main global consequence of synfuels development is climate modification, to which may be added the regional impact of dry and wet deposition of gaseous and particulate pollutants, and land and water quality deterioration due to soil erosion at the local level.

Bentz, E.J. Jr.; Salmon, E.J.

1981-01-01T23:59:59.000Z

392

CAFNA{sup (c)}, coded aperture imaging for fast neutron analysis: Application to contraband and explosive detection  

SciTech Connect (OSTI)

Fast neutron analysis is a technique for determination of the elemental composition of materials in bulk by detecting the energies of characteristic gamma rays, which are emitted by elements after a neutron interaction. These gamma rays are typically in the 2 to 6 MeV range and it is desired to image them with a high efficiency system. Coded aperture imaging is a technique, which can improve system sensitivity by as much as a factor of fifty as compared to conventional collimators. Such systems have been used in x-ray astronomy, but unlike x-ray astronomy, our system is designed for near field imaging. The choice of pattern is critical to the performance of the system but we have devised patterns such that the reconstruction of point like objects is clean and rapid with no spurious response. We have also used the technique for imaging of high energy radioisotopes used in nuclear medicine.

Lanza, R. C.; Zhang, L. [Department of Nuclear Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02138 (United States)

1999-06-10T23:59:59.000Z

393

R2oDNA Designer: Computational Design of Biologically Neutral Synthetic DNA Sequences  

Science Journals Connector (OSTI)

R2oDNA Designer: Computational Design of Biologically Neutral Synthetic DNA Sequences ... As the cost of whole gene synthesis is decreasing, whole genome synthesis at the other end of the spectrum has expanded our horizons to the prospect of fully engineered synthetic cells. ...

Arturo Casini; Georgia Christodoulou; Paul S. Freemont; Geoff S. Baldwin; Tom Ellis; James T. MacDonald

2014-01-31T23:59:59.000Z

394

Estimation of Probe Cell Locations in High-density Synthetic-oligonucleotide DNA Microarrays  

E-Print Network [OSTI]

Estimation of Probe Cell Locations in High-density Synthetic-oligonucleotide DNA Microarrays Harry Institute, Durham, NC 27710 1 #12;High-density synthetic-oligonucliotide DNA microarrays (HSDMs), which area required to hybridise an RNA sample to DNA probes. On an HSDM surface, hundreds of thousands

West, Mike

395

A synthetic peptide with estrogen-like activity derived from a phage-display peptide library  

E-Print Network [OSTI]

A synthetic peptide with estrogen-like activity derived from a phage- display peptide library. ER and ER exhibit a high degree of homology at the DNA binding domain (97%) whereas at the ligand agonists or antagonists are mainly synthetic compounds prepared by modifications that retain the core

Kasher, Roni

396

Orthogonal Control of Endogenous Gene Expression in Mammalian Cells Using Synthetic Ligands  

E-Print Network [OSTI]

ARTICLE Orthogonal Control of Endogenous Gene Expression in Mammalian Cells Using Synthetic Ligands South Mathews Avenue, Urbana, Illinois 61801 ABSTRACT: Gene switches have wide utility in synthetic-finger DNA binding domain (DBD). Our gene switch is specifically and reversibly con- trolled by 4

Zhao, Huimin

397

Synthetic Biology Slides by Daisuke KigaSlides by Daisuke Kiga  

E-Print Network [OSTI]

#12; DNA RNA #12;Synthetic Biology Slides by Daisuke KigaSlides by Daisuke Kiga #12;Two #12; DNA RNA DNA DNA #12; DNA RNA DNA DNA #12; DNA RNA DNA DNA translation DNAamino acid translation signal transduction rhythm RNA protein nucleotide Synthetic Biology #12

Hagiya, Masami

398

Analysis of Combinatorial cis-Regulation in Synthetic and Genomic Promoters  

E-Print Network [OSTI]

Analysis of Combinatorial cis-Regulation in Synthetic and Genomic Promoters Jason Gertz1, Eric D. Here we present such a model based on the analysis of synthetic promoter libraries in yeast. Thermodynamic models based only on the equilibrium binding of transcription factors to DNA and to each other

Siggia, Eric

399

Synthetic incoherent feedforward circuits show adaptation to the amount of their genetic template  

E-Print Network [OSTI]

Synthetic incoherent feedforward circuits show adaptation to the amount of their genetic template.12.10; accepted 6.6.11 Natural and synthetic biological networks must function reliably in the face of fluctuating expression efficiency and the DNA template amount of the network-coding genes. Gene product levels could

Sontag, Eduardo

400

Constructing High Complexity Synthetic Libraries of Long ORFs Using In Vitro Selection  

E-Print Network [OSTI]

for the design and synthesis of large synthetic DNA libraries coding for protein sequences suitable for useConstructing High Complexity Synthetic Libraries of Long ORFs Using In Vitro Selection Glen Cho selection experiments. Protein libraries are often encoded by chemically synthesized DNA, in which part

Heller, Eric

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

SYNTHESIS 0.1: BETA RELEASE OF A SYNTHETIC WAVEFORMS M. D'amico1  

E-Print Network [OSTI]

SYNTHESIS 0.1: BETA RELEASE OF A SYNTHETIC WAVEFORMS REPOSITORY M. D'amico1 , F. Pacor1 , R. PugliaISmograms (SYNTHESIS 0.1). It is designed to archive and distribute synthetic waveforms computed for earthquake hazard describing each scenario-event. The structure of SYNTHESIS is adopted from the ITACA database (http

Cerveny, Vlastislav

402

Four Postmortem Case Reports with Quantitative Detection of the Synthetic Cannabinoid, 5F-PB-22  

Science Journals Connector (OSTI)

......2 (CB2). The consumption of synthetic cannabinoids...V) Collision energy (eV) 5F-PB-22...5F-PB-22. The average ion transition ratio...pronounced dead in the home of friends during...returned to his home around noon the...highs-seizures after consumption of synthetic cannabinoids......

George Behonick; Kevin G. Shanks; Dennis J. Firchau; Gagan Mathur; Charles F. Lynch; Marcus Nashelsky; David J. Jaskierny; Chady Meroueh

2014-10-01T23:59:59.000Z

403

Optimal Part and Module Selection for Synthetic Gene Circuit Design Automation  

Science Journals Connector (OSTI)

Optimal Part and Module Selection for Synthetic Gene Circuit Design Automation ... A step toward automated synthetic circuit design is the selection of a part set so that the final circuit exhibits the desired behavior. ... Our workflow is the first to automate the prodn. of biol. ...

Linh Huynh; Ilias Tagkopoulos

2014-01-28T23:59:59.000Z

404

Polishing of synthetic electroplating wastewater in microcosm upflow constructed wetlands: Metals removal mechanisms  

E-Print Network [OSTI]

Polishing of synthetic electroplating wastewater in microcosm upflow constructed wetlands: Metals in microcosm upflow constructed wetlands used for polishing of synthetic electroplating wastewater. Four types (2014) 53-42" DOI : 10.1016/j.cej.2013.12.075 #12;Keywords electroplating wastewater, metals, cyanides

Paris-Sud XI, Université de

405

Fe(II) Sorption on a Synthetic Montmorillonite. A Combined Macroscopic and Spectroscopic Study  

E-Print Network [OSTI]

Fe(II) Sorption on a Synthetic Montmorillonite. A Combined Macroscopic and Spectroscopic Study fine structure (EXAFS) and Mossbauer spectroscopy combined with macroscopic sorption experiments were employed to investigate the sorption mechanism of Fe(II) on an iron-free synthetic montmorillonite (Na

Wehrli, Bernhard

406

FSAAWG, ROME 2011 1 Synthetic Voice Forgery in the Forensic Context: a  

E-Print Network [OSTI]

FSAAWG, ROME 2011 1 Synthetic Voice Forgery in the Forensic Context: a short tutorial Guillaume Paristech, dép. TSI 37-39 rue Dareau 75014 PARIS Abstract--Technical voice forgery in the forensic area has, the forensic context is quite different since the human ear might be able to detect a synthetic voice, thus

Paris-Sud XI, Université de

407

The Aperture-coupled U-slotted Patch Antenna WX.Zbang*, C.S.Pyo**,S.IJeon**, S.P.Lee**, N.HMyung***  

E-Print Network [OSTI]

The Aperture-coupled U-slotted Patch Antenna WX.Zbang*, C.S.Pyo**,S.IJeon**, S.P.Lee**, N The microstrip patch used as a resonant antennahas been rid of it main shortageof narrow band, various broadband patch antennas had been developed by means of the multiple resonance principle. Among them the U

Myung, Noh-Hoon

408

Synthetic jets at large Reynolds number and comparison to continuous jets  

SciTech Connect (OSTI)

Experimental measurements and flow visualization of synthetic jets and similar continuous jets are described. The dimensionless stroke length necessary to form a 2-D synthetic jet is between 5 and 10, with wider-nozzle jets consistently requiring a smaller value. Synthetic jets are wider, slower and have more momentum than similar continuous jets. Synthetic jets are generated using four nozzle widths that vary by a factor of four, and the driving frequency is varied over an order of magnitude. The resultant jets are in the range 13.5 < L{sub o}/h < 80.8 and 695 < Re{sub Uo} < 14700. In spite of the large range of stroke lengths, the near-field behavior of the synthetic jets scales with L{sub o}/h.

Smith, B. L. (Barton L.); Swift, G. W. (Gregory W.)

2001-01-01T23:59:59.000Z

409

What causes the large extensions of red-supergiant atmospheres? Comparisons of interferometric observations with 1-D hydrostatic, 3-D convection, and 1-D pulsating model atmospheres  

E-Print Network [OSTI]

We present the atmospheric structure and the fundamental parameters of three red supergiants, increasing the sample of RSGs observed by near-infrared spectro-interferometry. Additionally, we test possible mechanisms that may explain the large observed atmospheric extensions of RSGs. We carried out spectro-interferometric observations of 3 RSGs in the near-infrared K-band with the VLTI/AMBER instrument at medium spectral resolution. To comprehend the extended atmospheres, we compared our observational results to predictions by available hydrostatic PHOENIX, available 3-D convection, and new 1-D self-excited pulsation models of RSGs. Our near-infrared flux spectra are well reproduced by the PHOENIX model atmospheres. The continuum visibility values are consistent with a limb-darkened disk as predicted by the PHOENIX models, allowing us to determine the angular diameter and the fundamental parameters of our sources. Nonetheless, in the case of V602 Car and HD 95686, the PHOENIX model visibilities do not predict ...

Arroyo-Torres, B; Chiavassa, A; Scholz, M; Freytag, B; Marcaide, J M; Hauschildt, P H; Wood, P R; Abellan, F J

2015-01-01T23:59:59.000Z

410

Fate of Mercury in Synthetic Gypsum Used for Wallboard Production  

SciTech Connect (OSTI)

This report presents and discusses results from Task 5 of the study ''Fate of Mercury in Synthetic Gypsum Used for Wallboard Production,'' performed at a full-scale commercial wallboard plant. Synthetic gypsum produced by wet flue gas desulfurization (FGD) systems on coal-fired power plants is commonly used in the manufacture of wallboard. The FGD process is used to control the sulfur dioxide emissions which would result in acid rain if not controlled. This practice has long benefited the environment by recycling the FGD gypsum byproduct, which is becoming available in increasing quantities, decreasing the need to landfill this material, and increasing the sustainable design of the wallboard product. However, new concerns have arisen as recent mercury control strategies developed for power plants involve the capture of mercury in FGD systems. The objective of this study is to determine whether any mercury is released into the atmosphere when the synthetic gypsum material is used as a feedstock for wallboard production. The project is being co-funded by the U.S. DOE National Energy Technology Laboratory (Cooperative Agreement DE-FC26-04NT42080), USG Corporation, and EPRI. USG Corporation is the prime contractor, and URS Group is a subcontractor. The project scope includes five discrete tasks, each conducted at various USG wallboard plants using synthetic gypsum from different FGD systems. The five tasks were to include (1) a baseline test, then variations representing differing power plant (2) emissions control configurations, (3) treatment of fine gypsum particles, (4) coal types, and (5) FGD reagent types. However, Task 5, which was to evaluate gypsum produced from an alternate FGD reagent, could not be conducted as planned. Instead, Task 5 was conducted at conditions similar to a previous task, Task 3, although with gypsum from an alternate FGD system. In this project, process stacks in the wallboard plant have been sampled using the Ontario Hydro method. The stack locations sampled for each task include a dryer for the wet gypsum as it enters the plant and a gypsum calciner. The stack of the dryer for the wet wallboard product was also tested as part of this task, and was tested as part of Tasks 1 and 4. Also at each site, in-stream process samples were collected and analyzed for mercury concentration before and after each significant step in wallboard production. The Ontario Hydro results, process sample mercury concentration data, and process data were used to construct mercury mass balances across the wallboard plants. Task 5 was conducted at a wallboard plant processing synthetic gypsum from a power plant that fires Eastern bituminous coal. The power plant is equipped with a selective catalytic reduction (SCR) system for NOX emissions control, but the SCR was bypassed during the time period the gypsum tested was produced. The power plant has a single-loop, open spray tower, limestone reagent FGD system, with forced oxidation conducted in a reaction tank integral with the FGD absorber. The FGD system has gypsum fines blow down as part of the dewatering step. Gypsum fines blow down is believed to be an important variable that impacts the amount of mercury in the gypsum byproduct and possibly its stability during the wallboard process. The results of the Task 5 stack testing, as measured by the Ontario Hydro method, detected that an average of 51% of the incoming mercury in the FGD gypsum was emitted during wallboard production. These losses were distributed as 2% or less each across the wet gypsum dryer and product wallboard dryer, and about 50% across the gypsum calciner. Emissions were similar to what Task 3 results showed, on both a percentage and a mass basis, for gypsum produced by a power plant firing bituminous coal and also having gypsum fines blow down as part of the FGD dewatering scheme. As was seen in the Task 1 through 4 results, most of the mercury detected in the stack testing on the wet gypsum dryer and kettle calciner was in the form of elemental mercury. In the wallboard dryer kiln, a more signific

Jessica Marshall Sanderson

2006-06-01T23:59:59.000Z

411

Successful Radiotherapy of Tumor in Pretargeted Mice by 188Re-Radiolabeled Phosphorodiamidate Morpholino Oligomer, a Synthetic DNA Analogue  

Science Journals Connector (OSTI)

...188Re-Radiolabeled Phosphorodiamidate Morpholino Oligomer, a Synthetic DNA Analogue Guozheng Liu 1 Requests for reprints: Guozheng...188Re-radiolabeled phosphorodiamidate morpholino oligomer, a synthetic DNA analogue. | Pretargeting has been attracting increasing...

Guozheng Liu; Shuping Dou; George Mardirossian; Jiang He; Surong Zhang; Xinrong Liu; Mary Rusckowski; Donald J. Hnatowich

2006-08-15T23:59:59.000Z

412

Nuclear magnetic resonance studies of drug-nucleic acid interactions at the synthetic DNA level in solution  

Science Journals Connector (OSTI)

Nuclear magnetic resonance studies of drug-nucleic acid interactions at the synthetic DNA level in solution ...

Dinshaw J. Patel

1979-04-01T23:59:59.000Z

413

Detection of human rotavirus by using an alkaline phosphatase-conjugated synthetic DNA probe in comparison with enzyme-linked immunoassay and polyacrylamide gel analysis.  

Science Journals Connector (OSTI)

...alkaline phosphatase-conjugated synthetic DNA probe in comparison with enzyme-linked...alkaline phosphatase-conjugated synthetic DNA probe in comparison with enzyme-linked...Alkaline Phosphatase-Conjugated Synthetic DNA Probe in Comparison with Enzyme-Linked...

D M Olive; S K Sethi

1989-01-01T23:59:59.000Z

414

An Optimized, Synthetic DNA Vaccine Encoding the Toxin A and Toxin B Receptor Binding Domains of Clostridium difficile Induces Protective Antibody Responses In Vivo  

Science Journals Connector (OSTI)

...Immunity and Vaccines An Optimized, Synthetic DNA Vaccine Encoding the Toxin A and...these advantages make newer, synthetic DNA-based immunizations a desirable...our work demonstrates that a synthetic DNA vaccine encoding the toxin RBDs...

Scott M. Baliban; Amanda Michael; Berje Shammassian; Shikata Mudakha; Amir S. Khan; Simon Cocklin; Isaac Zentner; Brian P. Latimer; Laurent Bouillaut; Meredith Hunter; Preston Marx; Niranjan Y. Sardesai; Seth L. Welles; Jeffrey M. Jacobson; David B. Weiner; Michele A. Kutzler

2014-07-14T23:59:59.000Z

415

Detection of rotavirus by hybridization with a nonradioactive synthetic DNA probe and comparison with commercial enzyme immunoassays and silver-stained polyacrylamide gels.  

Science Journals Connector (OSTI)

...hybridization with a nonradioactive synthetic DNA probe and comparison with commercial...hybridization with a nonradioactive synthetic DNA probe and comparison with commercial...Hybridization with a Nonradioactive Synthetic DNA Probe and Comparison with Commercial...

M Arens; E M Swierkosz

1989-06-01T23:59:59.000Z

416

Cyclic testing of continuously wetted synthetic fiber ropes  

SciTech Connect (OSTI)

A laboratory study of the cyclic loading endurance properties of continuously wetted synthetic, or manmade, fibre ropes has been conducted on ropes of various materials and forms of construction. The materials investigated were polyamides, polyester and polypropylene. Forms of construction studied were braid-on-braid, eight strand (square) and parallel lay. Rope sizes researched were 100 kN (10 tonf) nominal breaking force and up to 1.0 MN (100 tonf) nominal breaking force. All specimens were single leg. The test results indicate the superior bollard abrasion resistance and interstrand friction wear resistance of polyester and polypropylene over the polyamides. Trends, where observed, are also reported upon for the cyclic endurance performance of the forms of construction investigated. The improvements (or otherwise) in endurance effected by sheathing, coating and thimble protection of the eyes are also discussed. The results and performance trends observed on this test programme will be of interest to designers and users of mooring or tethering systems which operate continuously wet.

Crawford, H.; McTernan, L.M.

1983-05-01T23:59:59.000Z

417

Observation of Dirac Monopoles in a Synthetic Magnetic Field  

E-Print Network [OSTI]

Magnetic monopoles --- particles that behave as isolated north or south magnetic poles --- have been the subject of speculation since the first detailed observations of magnetism several hundred years ago. Numerous theoretical investigations and hitherto unsuccessful experimental searches have followed Dirac's 1931 development of a theory of monopoles consistent with both quantum mechanics and the gauge invariance of the electromagnetic field. The existence of even a single Dirac magnetic monopole would have far-reaching physical consequences, most famously explaining the quantization of electric charge. Although analogues of magnetic monopoles have been found in exotic spin-ices and other systems, there has been no direct experimental observation of Dirac monopoles within a medium described by a quantum field, such as superfluid helium-3. Here we demonstrate the controlled creation of Dirac monopoles in the synthetic magnetic field produced by a spinor Bose-Einstein condensate. Monopoles are identified, in both experiments and matching numerical simulations, at the termini of vortex lines within the condensate. By directly imaging such a vortex line, the presence of a monopole may be discerned from the experimental data alone. These real-space images provide conclusive and long-awaited experimental evidence of the existence of Dirac monopoles. Our result provides an unprecedented opportunity to observe and manipulate these quantum-mechanical entities in a controlled environment.

M. W. Ray; E. Ruokokoski; S. Kandel; M. Mttnen; D. S. Hall

2014-08-13T23:59:59.000Z

418

Production of synthetic gasoline and diesel fuel from nonpetroleum resources  

SciTech Connect (OSTI)

In late 1985, the New Zealand Gas-to-Gasoline Complex was successfully streamed producing high octane gasoline from natural gas. The heart of this complex is the Mobil fixed-bed Methanol-to-Gasoline (MTG) section which represents one of several newly developed technologies for production of synthetic gasoline and diesel fuels. All of these technologies are based on production of methanol by conventional technology, followed by conversion of the methanol to transportation fuel. The fixed-bed (MTG) process has been developed and commercialized. The fluid-bed version of the MTG process, which is now also available for commercial license, has a higher thermal efficiency and possesses substantial yield and octane number advantages over the fixed-bed. Successful scale-up was completed in 1984 in a 100 BPD semi-works plant in Wesseling, Federal Republic of Germany. The project was funded jointly by the U.S. and German governments and by the industrial participants: Mobil, Union Rheinsche Braunkohlen Kraftstoff, AG; and Uhde, GmbH. This fluid-bed MTG project was extended recently to demonstrate a related fluid-bed process for selective conversion of methanol to olefins (MTO). The MTO process can be combined with Mobil's commercially available olefins conversion process (Mobil-Olefins-to-Gasoline-and-Distillate, MOGD) for coproduction of high quality gasoline and distillate via methanol. This MTO process was also successfully demonstrated at the Wesseling semiworks with this project being completed in late 1985.

Tabak, S.A.; Avidan, A.A.; Krambeck, F.J.

1986-04-01T23:59:59.000Z

419

Natural and synthetic DNA elements with the CArG motif differ in expression and protein-binding properties.  

Science Journals Connector (OSTI)

...research-article Research Article Natural and synthetic DNA elements with the CArG motif differ...cognate promoters. Natural and synthetic DNA elements with the CArG motif differ...Vol. 11, No. 12 Natural and Synthetic DNA Elements with the CArG Motif Differ...

I M Santoro; K Walsh

1991-12-01T23:59:59.000Z

420

Ultrafast Spectroscopic Study on Caffeine Mediated Dissociation of Mutagenic Ethidium from Synthetic DNA and Various Cell Nuclei  

Science Journals Connector (OSTI)

Ultrafast Spectroscopic Study on Caffeine Mediated Dissociation of Mutagenic Ethidium from Synthetic DNA and Various Cell Nuclei ... (10) The purified (reverse-phase cartridge) synthetic DNA oligonucleotides of 12 bases (dodecamer) with sequence CGCGAATTCGCG were obtained from TriLink. ... In Figure 1a,b steady-state and time-resolved studies on the Et intercalated to the synthetic DNA are presented. ...

Soma Banerjee; Debajit Bhowmik; Pramod Kumar Verma; Rajib Kumar Mitra; Anirban Sidhhanta; Gautam Basu; Samir Kumar Pal

2011-10-27T23:59:59.000Z

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

Face-to-Face and Edge-to-Face ??? Interactions in a Synthetic DNA Hairpin with a Stilbenediether Linker  

Science Journals Connector (OSTI)

Face-to-Face and Edge-to-Face ??? Interactions in a Synthetic DNA Hairpin with a Stilbenediether Linker ... This property allowed investigation of hole injection and migration processes in the synthetic DNA hairpins. ... Structure and Photoinduced Electron Transfer in Exceptionally Stable Synthetic DNA Hairpins with Stilbenediether Linkers ...

Martin Egli; Valentina Tereshko; Garib N. Mushudov; Ruslan Sanishvili; Xiaoyang Liu; Frederick D. Lewis

2003-08-16T23:59:59.000Z

422

Driving Force Dependence of Electron Transfer Dynamics in Synthetic DNA Hairpins  

Science Journals Connector (OSTI)

Driving Force Dependence of Electron Transfer Dynamics in Synthetic DNA Hairpins ... The driving force dependence of photoinduced electron-transfer dynamics in duplex DNA has been investigated for 16 synthetic DNA hairpins in which an acceptor chromophore serves as a linker connecting two complementary oligonucleotide arms containing a single donor nucleobase located either adjacent to the linker or separated from the linker by two unreactive base pairs. ... for a family of synthetic DNA hairpins in which a stilbene dicarboxamide forms a bridge connecting two oligonucleotide arms. ...

Frederick D. Lewis; Rajdeep S. Kalgutkar; Yansheng Wu; Xiaoyang Liu; Jianqin Liu; Ryan T. Hayes; Scott E. Miller; Michael R. Wasielewski

2000-11-23T23:59:59.000Z

423

Synthetic Nano-Low Density Lipoprotein as Targeted Drug DeliveryVehicle for Glioblastoma Multiforme  

SciTech Connect (OSTI)

This paper discribes a synthetic low density lipoprotein(LDL) made by complexing a 29 amino acid that consists of a lipid bindingdomain and the LDL receptor binding domain with a lipid microemulsion.The nano-LDL particles were intermdiate in size between LDL and HDL andbound to LDL receptors on GBM brain tumor cells. Synthetic nano-LDLuptake by GBM cells was LDL receptor specific and dependent on cellreceptor number. It is suggested that these synthetic particles can serveas a delivery vehicle for hydophobic anti-tumor drugs by targeting theLDL receptor.

Nikanjam, Mina; Blakely, Eleanor A.; Bjornstad, Kathleen A.; Shu,Xiao; Budinger, Thomas F.; Forte, Trudy M.

2006-06-14T23:59:59.000Z

424

The Nature of Nearby Counterparts to Intermediate-Redshift Luminous Compact Blue Galaxies. III. Interferometric Observations of Neutral Atomic and Molecular Gas  

E-Print Network [OSTI]

We present the results of a VLA and OVRO-MMA follow-up to our single-dish surveys of the neutral atomic and molecular gas in a sample of nearby Luminous Compact Blue Galaxies (LCBGs). These luminous, blue, high surface brightness, starbursting galaxies were selected using criteria similar to that used to define LCBGs at higher redshifts. The surveys were undertaken to study the nature and evolutionary possibilities of LCBGs, using dynamical masses and gas depletion time scales as constraints. Here we present nearly resolved VLA H I maps of four LCBGs, as well as results from the literature for a fifth LCBG. In addition, we present OVRO-MMA maps of CO(J=1-0) in two of these LCBGs. We have used the resolved H I maps to separate the H I emission from target galaxies and their companions to improve the accuracy of our gas and dynamical mass estimates. For this sub-sample of LCBGs, we find that the dynamical masses measured with the single-dish telescope and interferometer are in agreement. However, we find that we have overestimated the mass of H I in two galaxies by a significant amount, possibly as much as 75%, when compared to the single-dish estimates. These two galaxies have companions within a few arc minutes; we find that our single-dish and interferometric measurements of H I masses are in reasonable agreement for galaxies with more distant companions. The H I velocity fields indicate that all five galaxies are clearly rotating yet distorted, likely due to recent interactions. Our measurements of the gas and dynamical masses of LCBGs point towards evolution into low mass galaxies such as dwarf ellipticals, irregulars, and low mass spirals, consistent with studies of LCBGs at higher redshifts.

C. A. Garland; D. J. Pisano; J. P. Williams; R. Guzman; F. J. Castander; L. J. Sage

2007-08-20T23:59:59.000Z

425

Remote optical sensing on the nanometer scale with a bowtie aperture nano-antenna on a SNOM fiber tip  

E-Print Network [OSTI]

Plasmonic nano-antennas have proven the outstanding ability of sensing chemical and physical processes down to the nano-meter scale. Sensing is usually achieved within the highly confined optical fields generated resonantly by the nano-antennas, i.e. in contact to the nano-structures. In these paper, We demonstrate the sensing capability of nano-antennas to their larger scale environment, well beyond their plasmonic confinement volume, leading to the concept of 'remote' (non contact) sensing on the nano-meter scale. On the basis of a bowtie-aperture nano-antenna (BNA) integrated at the apex of a SNOM fiber tip, we introduce an ultra-compact, move-able and background-free optical nano-sensor for the remote sensing of a silicon surface (up to distance of 300 nm). Sensitivity of the BNA to its large scale environment is high enough to expect the monitoring and control of the spacing between the nano-antenna and a silicon surface with sub-nano-meter accuracy. This work paves the way towards a new class of nano-po...

Atie, Elie M; Eter, Ali El; Salut, Roland; Nedeljkovic, Dusan; Tannous, Tony; Baida, Fadi I; Grosjean, Thierry

2015-01-01T23:59:59.000Z

426

Effect of a synthetic leu-enkephalin analog on the intensity of DNA synthesis in insects  

Science Journals Connector (OSTI)

The hexapeptide dalargin (a synthetic analog of leu-enkephalin) injected in the...Galleria mellonella) and of mealworm (Tenebrio molitor...) causes a dose-dependent increase in the DNA content and an increase in ...

T. I. Lapteva; N. O. Minkova

1997-04-01T23:59:59.000Z

427

A novel synthetic DNA minor groove binder, MS-247: antitumor activity and cytotoxic mechanism  

Science Journals Connector (OSTI)

Purpose: MS-247 is a novel synthetic compound possessing a DNA-binding moiety and a DNA-alkylating residue, chlorambucil. In this study, ... murine tumor cell lines and its effects on DNA molecul...

Y. Matsuba; H. Edatsugi; I. Mita; A. Matsunaga

2000-06-01T23:59:59.000Z

428

DNA synthetic phase duration of mouse ileal epithelium in acute renal failure  

Science Journals Connector (OSTI)

The effect of progressive acute renal failure on the DNA synthetic phase duration of ileal epithelium was assessed...3-thymidine approximately 18 hours after urinary outflow obstruction in mice. Controls were sub...

Francis T. McDermott; Melinda K. Dalton

429

Nuclear DNA content in allopolyploid species and synthetic hybrids in the grass genus Paspalum  

Science Journals Connector (OSTI)

DNA content was estimated by flow cytometry in...Paspalum and five synthetic hybrids. Results were compared to known genome constitutions and phylogenetic relationships. DNA 2C-values ranged from 1.24 pg...P. jue...

M. Vaio; C. Mazzella; V. Porro; P. Speranza

2007-05-01T23:59:59.000Z

430

Synthetic Lethality: Molecular Co-targeting to Restore the DNA Repair Mechanisms in Prostate Cancer Cells  

Science Journals Connector (OSTI)

To this end, PARP inhibitors are the well-known class of drugs that have recently been proposed to reach synthetic lethality in DNA repair-defective, radio-resistant prostate tumors.

Gennaro Ilardi; Stefania Staibano

2013-01-01T23:59:59.000Z

431

Depression of Protein Synthetic Capacity Due to Cloned-Gene Expression in E. coli  

E-Print Network [OSTI]

Depression of Protein Synthetic Capacity Due to Cloned-Gene Expression in E. coli Thomas K. Wood using pulse-labelling and RNA-DNA hybridiza- tions. Specifically, the steady-state level, synthesis rate

Wood, Thomas K.

432

Stabilization of DNA Triple Helices Using Conjugates of Oligonucleotides and Synthetic Ligands  

Science Journals Connector (OSTI)

The possibility is discussed of stabilizing a DNA triple helix by covalent conjugation to the ... triplex-specific intercalators. As a target, a synthetic 29-mer duplex containing a natural polypurine...

A. N. Sinyakov; V. A. Ryabinin; G. N. Grimm; A. S. Boutorine

2001-03-01T23:59:59.000Z

433

Consequences of Substituting 2NH2A for a in Synthetic DNAS  

Science Journals Connector (OSTI)

Chemical and spectroscopic consequences of replacing A with 2NH2A have been examined in a variety of synthetic DNAs. This substitution, which permits formation...m elevation, however, is much smaller in the deox...

Frank B. Howard; H. Todd Miles

1983-01-01T23:59:59.000Z

434

Gene Designer: a synthetic biology tool for constructing artificial DNA segments  

Science Journals Connector (OSTI)

Gene Designer is a stand-alone software for fast and easy design of synthetic DNA segments. Users can easily add, edit ... drag-and-drop graphic interface and a hierarchical DNA/Protein object map. Using advanced...

Alan Villalobos; Jon E Ness; Claes Gustafsson; Jeremy Minshull

2006-06-01T23:59:59.000Z

435

Thermal stability of synthetic aurichalcite implications for making mixed metal oxides for use as catalysts  

Science Journals Connector (OSTI)

TG combined with MS has been used to study the thermal decomposition of a synthetic aurichalcite with varying copper-zinc ratios from 0....3 and CuCO3.... A higher temperature decomposition at around 805C, based...

R. L. Frost; A. J. Locke; M. C. Hales

2008-10-01T23:59:59.000Z

436

Structural Analysis of Human and Bovine Bone for Development of Synthetic Materials  

E-Print Network [OSTI]

bones, as well as mimicking nature by developing a synthetic material to repair bones. Experimentally, bovine bone, tumor-free human bone, and cancerous human bone were studied via the small scale mechanical loading test. Failure analysis was conducted...

Jang, Eunhwa

2012-10-19T23:59:59.000Z

437

BTI Undergraduate Fellows Biotechnology, biofuels, synthetic ecology summer research fellowships for undergraduates at  

E-Print Network [OSTI]

BTI Undergraduate Fellows Biotechnology, biofuels, synthetic ecology summer research fellowships for undergraduates at the University of Minnesota's Biotechnology Institute. Summer research fellowships available of a faculty mentor in the Biotechnology Institute. The fellowship includes special activities for professional

Weiblen, George D

438

BTI undergraduate fellows Biotechnology, biofuels, synthetic ecology summer research fellowships for  

E-Print Network [OSTI]

BTI undergraduate fellows Biotechnology, biofuels, synthetic ecology summer research fellowships for undergraduates at the University of Minnesota's Biotechnology Institute. Summer research fellowships available of a faculty mentor in the Biotechnology Institute. The fellowship includes special activities for professional

Amin, S. Massoud

439

A Path to the Formulation of New Generations of Synthetic Jet Fuel Derived from Natural Gas  

E-Print Network [OSTI]

with industry and academia to study synthetic jet fuels derived from natural gas. These studies are being implemented at its Fuel Characterization Lab where the most advanced testing equipment is used and strict Quality Management and safety systems are followed...

Al-Nuaimi, Ibrahim Awni Omar Hassan

2013-05-20T23:59:59.000Z

440

Experimental plant for production of synthetic triplex-polymerized ethylene-propylene rubber  

Science Journals Connector (OSTI)

An experimental plant with an output of 500 kg/day, which is intended for the formulation of process production regimes, and the running times of experimental ... various grades of synthetic triple-polymerized et...

V. I. Peretyatko; V. P. Pogrebtsov; V. A. Shepelin

2010-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

Ribozyme-based "insulator parts" buffer synthetic circuits from genetic context  

E-Print Network [OSTI]

Synthetic genetic programs are built from circuits that integrate sensors and implement temporal control of gene expression14. Transcriptional circuits are layered by using promoters to carry the signal between circuits. ...

Lou, Chunbo

442

A fast, robust and tunable synthetic gene oscillator Jesse Stricker1  

E-Print Network [OSTI]

LETTERS A fast, robust and tunable synthetic gene oscillator Jesse Stricker1 *, Scott Cookson1 *, Matthew R. Bennett1,2 *, William H. Mather1 , Lev S. Tsimring2 & Jeff Hasty1,2 One defining goal

Hasty, Jeff

443

Development of a high-resolution gamma-ray imaging system with synthetic collimation.  

E-Print Network [OSTI]

??This work outlines the development of a multi-pinhole single-photon emission computed tomography (SPECT) system designed to produce a synthetic-collimator image of a small field of (more)

Havelin, Ronan

2013-01-01T23:59:59.000Z

444

Polishing of synthetic electroplating wastewater in microcosm upflow constructed wetlands: Effect of operating conditions  

E-Print Network [OSTI]

Polishing of synthetic electroplating wastewater in microcosm upflow constructed wetlands: Effect of polishing electroplating wastewater in subsurface vertical flow constructed wetland. Electroplating wastewater treatment or polishing in constructed wetlands (CWs) was studied to a very limited degree. Four

Paris-Sud XI, Université de

445

High-resolution seismology and comparison of synthetic seismograms for the Powderhorn field  

E-Print Network [OSTI]

. This method requires one more step than second method but the result is much better. Synthetic seismograms were generated by two methods. one used the reflection-coefficients model and the other used the impulse-response model (including multiples...

Lee, Kyoung-Jin

2012-06-07T23:59:59.000Z

446

Transport synthetic acceleration methods for one-dimensional deterministic transport problems  

E-Print Network [OSTI]

We construct and analyze three transport synthetic acceleration schemes. Our goal is the development of a rapidly convergent acceleration scheme that is robust and computationally efficient even for thick, diffusive problems. Additionally, we hope...

Hawkins, William Daryl

2012-06-07T23:59:59.000Z

447

High-field remanence properties of synthetic and natural submicrometre haematites and goethites: significance  

E-Print Network [OSTI]

High-field remanence properties of synthetic and natural submicrometre haematites and goethites September 2004 Editor: V. Courtillot Abstract Haematite and goethite are significant magnetic components both of marine and terrestrial sediments. Variable magnetic behaviour in haematite and goethite has

448

A Method for Fast, High-Precision Characterization of Synthetic Biology Devices  

E-Print Network [OSTI]

Engineering biological systems with predictable behavior is a foundational goal of synthetic biology. To accomplish this, it is important to accurately characterize the behavior of biological devices. Prior characterization ...

Beal, Jacob

2012-04-07T23:59:59.000Z

449

Porphyrinquinone compounds as synthetic models of the reaction centre  

Science Journals Connector (OSTI)

Data on the synthesis, steric structure, and photochemical properties of porphyrinquinone compounds as synthetic models of the reaction centre in photosynthesis are examined and described systematically. The bibliography includes 113 references.

V V Borovkov; Rima P Evstigneeva; L N Strekova; E I Filippovich

1989-01-01T23:59:59.000Z

450

Procedure for matching synfuel users with potential suppliers. Appendix B. Proposed and ongoing synthetic fuel production projects  

SciTech Connect (OSTI)

To assist the Department of Energy, Office of Fuels Conversion (OFC), in implementing the synthetic fuel exemption under the Powerplant and Industrial Fuel Use Act (FUA) of 1978, Resource Consulting Group, Inc. (RCG), has developed a procedure for matching prospective users and producers of synthetic fuel. The matching procedure, which involves a hierarchical screening process, is designed to assist OFC in: locating a supplier for a firm that wishes to obtain a synthetic fuel exemption; determining whether the fuel supplier proposed by a petitioner is technically and economically capable of meeting the petitioner's needs; and assisting the Synthetic Fuels Corporation or a synthetic fuel supplier in evaluating potential markets for synthetic fuel production. A data base is provided in this appendix on proposed and ongoing synthetic fuel production projects to be used in applying the screening procedure. The data base encompasses a total of 212 projects in the seven production technologies.

None

1981-08-07T23:59:59.000Z

451

Process for gasification using a synthetic CO.sub.2 acceptor  

DOE Patents [OSTI]

A gasification process is disclosed using a synthetic CO.sub.2 acceptor consisting essentially of at least one compound selected from the group consisting of calcium oxide and calcium carbonate supported in a refractory carrier matrix, the carrier having the general formula Ca.sub.5 (SiO.sub.4).sub.2 CO.sub.3. A method for producing the synthetic CO.sub.2 acceptor is also disclosed.

Lancet, Michael S. (Pittsburgh, PA); Curran, George P. (Pittsburgh, PA)

1980-01-01T23:59:59.000Z

452

Crystallization of Synthetic Coal?Petcoke Slag Mixtures Simulating Those Encountered in Entrained Bed Slagging Gasifiers  

Science Journals Connector (OSTI)

Crystallization of Synthetic Coal?Petcoke Slag Mixtures Simulating Those Encountered in Entrained Bed Slagging Gasifiers ... Commercial entrained bed slagging gasifiers use a carbon feedstock of coal, petcoke, or combinations of them to produce CO and H2. ... A hot-stage confocal scanning laser microscope (CSLM) was used to analyze the kinetic behavior of slag crystallization for a range of synthetic coal?petcoke mixtures. ...

Jinichiro Nakano; Seetharaman Sridhar; Tyler Moss; James Bennett; Kyei-Sing Kwong

2009-04-07T23:59:59.000Z

453

Estimation of heterosis and heterosis retention in the development of a synthetic breed of goat  

E-Print Network [OSTI]

ESTIMATION OF HETEROSIS AND HETEROSIS RETENTION IN THE DEVELOPMENT OF A SYNTHETIC BREED OF GOAT A Thesis by MATTHEW BLAIN JONES Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE May 1994 Major Subject Animal Breeding ESTIMATION OF HETEROSIS AND HETEROSIS RETENTION IN THE DEVELOPMENT OF A SYNTHETIC BREED OF GOAT A Thesis by MATTHEW BLAIN JONES Submitted to Texas A&M University in partial...

Jones, Matthew Blain

2012-06-07T23:59:59.000Z

454

Interactions of Jet Fuels with Nitrile O-Rings: Petroleum-Derived versus Synthetic Fuels  

SciTech Connect (OSTI)

A transition from petroleum-derived jet fuels to blends with Fischer-Tropsch (F-T) fuels, and ultimately fully synthetic hydro-isomerized F-T fuels has raised concern about the fate of plasticizers in nitrile-butadiene rubber o-rings that are contacted by the fuels as this transition occurs. The partitioning of plasticizers and fuel molecules between nitrile o-rings and petroleum-derived, synthetic, and additized-synthetic jet fuels has been measured. Thermal desorption of o-rings soaked in the various jet fuels followed by gas chromatographic analysis with a mass spectrometric detector showed many of the plasticizer and stabilizer compounds were removed from the o-rings regardless of the contact fuel. Fuel molecules were observed to migrate into the o-rings for the petroleum-derived fuel as did both the fuel and additive for a synthetic F-T jet fuel additized with benzyl alcohol, but less for the unadditized synthetic fuel. The specific compounds or classes of compounds involved in the partitioning were identified and a semiquantitative comparison of relative partitioning of the compounds of interest was made. The results provide another step forward in improving the confidence level of using additized, fuIly synthetic jet fuel in the place of petroleum-derived fueL

Gormley, R.J.; Link, D.D.; Baltrus, J.P.; Zandhuis, P.H.

2008-01-01T23:59:59.000Z

455

Interactions of Jet Fuels with Nitrile O-Rings: Petroleum-Derived versus Synthetic Fuels  

SciTech Connect (OSTI)

A transition from petroleum-derived jet fuels to blends with Fischer-Tropsch (F-T) fuels, and ultimately fully synthetic hydro-isomerized F-T fuels has raised concern about the fate of plasticizers in nitrile-butadiene rubber a-rings that are contacted by the fuels as this transition occurs. The partitioning of plasticizers and fuel molecules between nitrile a-rings and petroleum-derived, synthetic, and additized-synthetic jet fuels has been measured. Thermal desorption of o-rings soaked in the various jet fuels followed by gas chromatographic analysis with a mass spectrometric detector showed many of the plasticizer and stabilizer compounds were removed from the o-rings regardless of the contact fuel. Fuel molecules were observed to migrate into the o-rings for the petroleum-derived fuel as did both the fuel and additive for a synthetic F-T jet fuel additized with benzyl alcohol, but less for the unadditized synthetic fuel. The specific compounds or classes of compounds involved in the partitioning were identified and a semiquantitative comparison of relative partitioning of the compounds of interest was made. The results provide another step forward in improving the confidence level of using additized, fully synthetic jet fuel in the place of petroleum-derived fuel.

Gormley, R.J.; Link, D.D.; Baltrus, J.P.; Zandhuis, P.H.

2009-01-01T23:59:59.000Z

456

No compelling evidence of distributed production of CO in comet C/1995 O1 (Hale-Bopp) from millimeter interferometric data and a reanalysis of near-IR lines  

E-Print Network [OSTI]

Based on long-slit infrared spectroscopic observations, it has been suggested that half of the carbon monoxide present in the atmosphere of comet C/1995 O1 (Hale-Bopp) close to perihelion was released by a distributed source in the coma, whose nature (dust or gas) remains unidentified. We re-assess the origin of CO in Hale-Bopp's coma from millimeter interferometric data and a re-analysis of the IR lines. Simultaneous observations of the CO J(1-0) (115 GHz) and J(2-1) (230 GHz) lines were undertaken with the IRAM interferometer in single-dish and interferometric modes. The diversity of angular resolutions (from 1700 to 42000 km diameter at the comet) is suitable to study the radial distribution of CO and detect the extended source observed in the infrared. We used excitation and radiative transfer models to simulate the observations. Various CO density distributions were considered, including 3D time-dependent hydrodynamical simulations which reproduce a CO rotating jet. The CO J(1-0) and J(2-1) observations ...

Bockele-Morvan, D; Biver, N; Crovisier, J

2010-01-01T23:59:59.000Z

457

Combustion behavior of a spark ignition engine fueled with synthetic gases derived from biogas  

Science Journals Connector (OSTI)

Abstract Combustion results obtained from a spark ignition engine fueled with two synthetic gases obtained from catalytic decomposition of biogas are presented in this paper. These results are compared with those obtained when the engine was fueled with gasoline, methane and with the biogas from which synthetic gases are extracted. Experimental tests were performed under a wide range of speeds and at three equivalence ratios. Results showed that fractions of hydrogen in synthetic gases increased maximum pressures inside cylinder. Moreover, peak pressures were detected closer to top dead center than methane and biogas. Despite the fraction of diluents in the composition of synthetic gases, high speeds and lean conditions resulted in higher indicated efficiencies than those obtained with gasoline. Moreover, combustion speed and heat release rate were strongly influenced by the proportion of diluents and hydrogen in gaseous blends. CO and CO2 content in the composition of synthetic gases contributed to increase the exhaust concentrations of these pollutants compared with the other fuels, while HC decreased because of the small fraction of methane which remained unburned. Although \\{NOx\\} emissions were mitigated by diluents, like CO2 and air excess, high hydrogen fraction in composition of syngas involved elevated \\{NOx\\} emissions due to the increase in flame temperature that hydrogen produces.

J. Arroyo; F. Moreno; M. Muoz; C. Monn; N. Bernal

2014-01-01T23:59:59.000Z

458

Interferometric fiber optic displacement sensor  

DOE Patents [OSTI]

A method is presented to produce a change in the optical path length in the gap between two single mode optical fibers proportional to the lateral displacement of either fiber end normal to its axis. This is done with the use of refraction or diffraction at the interface between a guiding and non-guiding media to change the direction of propagation of the light in the gap. A method is also presented for laying a waveguide on a cantilever so that the displacement of the tip of the cantilever produces a proportional path length change in the gap by distancing the waveguide from the neutral axis of the cantilever. The fiber is supported as a cantilever or a waveguide is deposited on a micromachined cantilever and incorporated in an interferometer which is made totally on a silicon substrate with the use of integrated-optic technology. A resonant element in the form of a micro-bridge is incorporated in the ridge waveguide and produces a frequency output which is readily digitizeable and immune to laser frequency noise. Finally, monolithic mechanical means for phase modulation are provided on the same sensor substrate. This is done by vibrating the cantilever or micro-bridge either electrically or optically. 29 figs.

Farah, J.

1995-05-30T23:59:59.000Z

459

I. ISOLATION AND CHARACTERIZATION OF BIOACTIVE COMPOUNDS FROM SURINAME AND MADAGASCAR FLORA. II. A SYNTHETIC APPROACH TO LUCILACTAENE.  

E-Print Network [OSTI]

??ISOLATION AND CHARACTERIZATION OF BIOACTIVE COMPOUNDS FROM SURINAME AND MADAGASCAR FLORA AND A SYNTHETIC APPROACH TO LUCILACTAENE ABSTRACT Eba Adou As part of an International (more)

Adou, Eba

2006-01-01T23:59:59.000Z

460

Vehicle Technologies Office Merit Review 2014: Synthetic Solutions for Correcting Voltage Fade in LMR-NMC Cathodes  

Broader source: Energy.gov [DOE]

Presentation given by Argonne National Laboratory at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about synthetic...

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

A bio-synthetic interface for discovery of viral entry mechanisms.  

SciTech Connect (OSTI)

Understanding and defending against pathogenic viruses is an important public health and biodefense challenge. The focus of our LDRD project has been to uncover the mechanisms enveloped viruses use to identify and invade host cells. We have constructed interfaces between viral particles and synthetic lipid bilayers. This approach provides a minimal setting for investigating the initial events of host-virus interaction - (i) recognition of, and (ii) entry into the host via membrane fusion. This understanding could enable rational design of therapeutics that block viral entry as well as future construction of synthetic, non-proliferating sensors that detect live virus in the environment. We have observed fusion between synthetic lipid vesicles and Vesicular Stomatitis virus particles, and we have observed interactions between Nipah virus-like particles and supported lipid bilayers and giant unilamellar vesicles.

Gutzler, Mike; Maar, Dianna; Negrete, Oscar; Hayden, Carl C.; Sasaki, Darryl Yoshio; Stachowiak, Jeanne C.; Wang, Julia

2010-09-01T23:59:59.000Z

462

Comparison of Nonlinear Model Results Using Modified Recorded and Synthetic Ground Motions  

SciTech Connect (OSTI)

A study has been performed that compares results of nonlinear model runs using two sets of earthquake ground motion time histories that have been modified to fit the same design response spectra. The time histories include applicable modified recorded earthquake ground motion time histories and synthetic ground motion time histories. The modified recorded earthquake ground motion time histories are modified from time history records that are selected based on consistent magnitude and distance. The synthetic ground motion time histories are generated using appropriate Fourier amplitude spectrums, Arias intensity, and drift correction. All of the time history modification is performed using the same algorithm to fit the design response spectra. The study provides data to demonstrate that properly managed synthetic ground motion time histories are reasonable for use in nonlinear seismic analysis.

Robert E. Spears; J. Kevin Wilkins

2011-11-01T23:59:59.000Z

463

Analysis of synthetic motor oils for additive elements by ICP-AES  

SciTech Connect (OSTI)

Standard motor oils are made by blending paraffinic or naphthenic mineral oil base stocks with additive packages containing anti-wear agents, dispersants, corrosion inhibitors, and viscosity index improvers. The blender can monitor the correct addition of the additives by determining the additive elements in samples dissolved in a solvent by ICP-AES. Internal standardization is required to control sample transport interferences due to differences in viscosity between samples and standards. Synthetic motor oils, made with poly-alpha-olefins and trimethylol propane esters, instead of mineral oils, pose an additional challenge since these compounds affect the plasma as well as having sample transport interference considerations. The synthetic lubricant base stocks add significant oxygen to the sample matrix, which makes the samples behave differently than standards prepared in mineral oil. Determination of additive elements in synthetic motor oils will be discussed.

Williams, M.C.; Salmon, S.G. [Texaco Inc., Beacon, NY (United States)

1995-12-31T23:59:59.000Z

464

Organism, machine, artifact: The conceptual and normative challenges of synthetic biology  

Science Journals Connector (OSTI)

Abstract Synthetic biology is an emerging discipline that aims to apply rational engineering principles in the design and creation of organisms that are exquisitely tailored to human ends. The creation of artificial life raises conceptual, methodological and normative challenges that are ripe for philosophical investigation. This special issue examines the defining concepts and methods of synthetic biology, details the contours of the organismartifact distinction, situates the products of synthetic biology vis--vis this conceptual typology and against historical human manipulation of the living world, and explores the normative implications of these conclusions. In addressing the challenges posed by emerging biotechnologies, new light can be thrown on old problems in the philosophy of biology, such as the nature of the organism, the structure of biological teleology, the utility of engineering metaphors and methods in biological science, and humankinds relationship to nature.

Sune Holm; Russell Powell

2013-01-01T23:59:59.000Z

465

3D printing in X-ray and gamma-ray imaging: A novel method for fabricating high-density imaging apertures  

Science Journals Connector (OSTI)

Advances in 3D rapid-prototyping printers, 3D modeling software, and casting techniques allow for cost-effective fabrication of custom components in gamma-ray and X-ray imaging systems. Applications extend to new fabrication methods for custom collimators, pinholes, calibration and resolution phantoms, mounting and shielding components, and imaging apertures. Details of the fabrication process for these components, specifically the 3D printing process, cold casting with a tungsten epoxy, and lost-wax casting in platinum are presented.

Brian W. Miller; Jared W. Moore; Harrison H. Barrett; Teresa Fry; Steven Adler; Joe Sery; Lars R. Furenlid

2011-01-01T23:59:59.000Z

466

High-aperture binary axicons for the formation of the longitudinal electric field component on the optical axis for linear and circular polarizations of the illuminating beam  

SciTech Connect (OSTI)

Diffraction of uniformly polarized laser beams with vortex phase singularity is theoretically analyzed using the plane wave expansion. It is shown that for a high numerical aperture, an intense longitudinal electric field component is formed on the optical axis in this case. It is numerically demonstrated that an analogous effect is ensured for diffraction of a conventional Gaussian beam from asymmetric binary axicons. The field intensity on the optical axis can be varied either by rotating the optical element or by changing the direction of polarization of radiation.

Khonina, S. N., E-mail: khonina@smr.ru; Savelyev, D. A., E-mail: dmitrey.savelyev@yandex.ru [Russian Academy of Sciences, Institute for Image Processing Systems (Russian Federation)

2013-10-15T23:59:59.000Z

467

Fluorescence of synthetic DNA's at room temperature and neutral pH  

Science Journals Connector (OSTI)

The fluorescence of two synthetic DNA's, polyd(m5C) and poly[d(I-m5C)] is demonstrated at room temperature and neutral pH. Polyd(m5C) at pH 8.0 exhibits fluorescence qualitatively the same as the mononucleotide: the quantum yield is independent of excitation energy; the emission maximum is at 2.92 ??1 (355 nm). Poly[d(I-m5C)] exhibits fluorescence resembling that of the 5-methyldeoxycytidine component with an additional feature that is probably due to weak deoxyinosine fluorescence. Neither of these synthetic DNA's exhibits spectra suggestive of exciplex formation.

James E. Gill

1971-01-01T23:59:59.000Z

468

Synthetic peptides that cause F-actin bundling and block actin depolymerization  

DOE Patents [OSTI]

Synthetic peptides derived from sucrose synthase, and having homology to actin and actin-related proteins, sharing a common motif, useful for causing acting bundling and preventing actin depolymerization. Peptides exhibiting the common motif are described, as well as specific synthetic peptides which caused bundled actin and inhibit actin depolymerization. These peptides can be useful for treating a subject suffering from a disease characterized by cells having neoplastic growth, for anti-cancer therapeutics, delivered to subjects solely, or concomitantly or sequentially with other known cancer therapeutics. These peptides can also be used for stabilizing microfilaments in living cells and inhibiting growth of cells.

Sederoff, Heike (Raleigh, NC); Huber, Steven C (Savoy, IL); Larabell, Carolyn A (Berkeley, CA)

2011-10-18T23:59:59.000Z

469

The German plan for synthetic fuel self-sufficiency, 1933-1942  

E-Print Network [OSTI]

Major Subject: History THE GERMAN PLAN FOR SYNTHETIC FUEL SELF-SUFFICIENCY, 1933-1942 A Thesis by TERRY HUNT TOOLEY Approved as to style and content by: Chairman of Committee Head of Depart ent ~kaM PL~~~~ Member Member Member -. December... 1978 111 ABSTRACT The German Plan for Synthet1c Fuel Self-SuFficiency, 1933-1942 (December 1978) Terry Hunt Tooley, B. A. , Texas ARM Dn1versity Cha1rman of Advisory Committee: Or. Arnold P. Krammer By ach1eving a cooperation between industry...

Tooley, Terry Hunt

2012-06-07T23:59:59.000Z

470

Data-analysis strategy for detecting gravitational-wave signals from inspiraling compact binaries with a network of laser-interferometric detectors  

Science Journals Connector (OSTI)

A data-analysis strategy based on the maximum-likelihood method (MLM) is presented for the detection of gravitational waves from inspiraling compact binaries with a network of laser-interferometric detectors having arbitrary orientations and arbitrary locations around the globe. For simplicity, we restrict ourselves to the Newtonian inspiral wave form. However, the formalism we develop here is also applicable to a wave form with post-Newtonian (PN) corrections. The Newtonian wave form depends on eight parameters: the distance r to the binary, the phase ?c of the wave form at the time of final coalescence, the polarization-ellipse angle ?, the angle of inclination ? of the binary orbit to the line of sight, the source-direction angles {?,?}, the time of final coalescence tc at the fiducial detector, and the chirp time ?. All these parameters are relevant for a chirp search with multiple detectors, unlike the case of a single detector. The primary construct on which the MLM is based is the network likelihood ratio (LR). We obtain this ratio here. For the Newtonian inspiral wave form, the LR is a function of the eight signal parameters. In the MLM-based detection strategy, the LR must be maximized over all of these parameters. Here, we show that it is possible to maximize it analytically with respect to four of the eight parameters, namely, {r,?c,?,?}. Maximization over the time of arrival is handled most efficiently by using the fast-Fourier-transform algorithm, as in the case of a single detector. This not only allows us to scan the parameter space continuously over these five parameters but also cuts down substantially on the computational costs. The analytical maximization over the four parameters yields the optimal statistic on which the decision must be based. The value of the statistic also depends on the nature of the noises in the detectors. Here, we model these noises to be mainly Gaussian, stationary, and uncorrelated for every pair of detectors. Instances of non-Gaussianity, as are present in detector outputs, can be accommodated in our formalism by implementing vetoing techniques similar to those applied for single detectors. Our formalism not only allows us to express the likelihood ratio for the network in a very simple and compact form, but also is at the basis of giving an elegant geometric interpretation to the detection problem. Maximization of the LR over the remaining three parameters is handled as follows. Owing to the arbitrary locations of the detectors in a network, the time of arrival of a signal at any detector will, in general, be different from those at the others and, consequently, will result in signal time delays. For a given network, these time delays are determined by the source-direction angles {?,?}. Therefore, to maximize the LR over the parameters {?,?} one needs to scan over the possible time delays allowed by a network. We opt for obtaining a bank of templates for the chirp time and the time delays. This means that we construct a bank of templates over ?, ?, and ?. We first discuss idealized networks with all the detectors having a common noise curve for simplicity. Such an exercise nevertheless yields useful estimates about computational costs, and also tests the formalism developed here. We then consider realistic cases of networks comprising the LIGO and VIRGO detectors: These include two-detector networks, which pair up the two LIGOs or VIRGO with one of the LIGOs, and the three-detector network that includes VIRGO and both the LIGOs. For these networks we present the computational speed requirements, network sensitivities, and source-direction resolutions.

Archana Pai, Sanjeev Dhurandhar, and Sukanta Bose

2001-07-30T23:59:59.000Z

471

No compelling evidence of distributed production of CO in Comet C/1995 O1 (Hale-Bopp) from millimeter interferometric data and a re-analysis of near-IR lines  

Science Journals Connector (OSTI)

Based on long-slit infrared spectroscopic observations, it has been suggested that half of the carbon monoxide present in the atmosphere of Comet C/1995 O1 (Hale-Bopp) close to perihelion was released by a distributed source in the coma, whose nature (dust or gas) remains unidentified. We re-assess the origin of CO in Hale-Bopps coma from millimeter interferometric data and a re-analysis of the IR lines. Simultaneous observations of the CO J(10) (115GHz) and J(21) (230GHz) lines were undertaken with the IRAM Plateau de Bure interferometer in single-dish and interferometric modes. The diversity of angular resolutions (from 1700 to 42,000km diameter at the comet) is suitable to study the radial distribution of CO and detect the extended source observed in the infrared. We used excitation and radiative transfer models to simulate the single-dish and interferometric data. Various CO density distributions were considered, including 3D time-dependent hydrodynamical simulations which reproduce temporal variations caused by the presence of a CO rotating jet. The CO J(10) and J(21) observations can be consistently explained by a nuclear production of CO. Composite 50:50 nuclear/extended productions with characteristic scale lengths of CO parent Lp>1500km are rejected. Based on similar radiation transfer calculations, we show that the CO v=10 ro-vibrational lines observed in Comet Hale-Bopp at heliocentric distances less than 1.5AU are severely optically thick. The broad extent of the CO brightness distribution in the infrared is mainly due to optical depth effects entering in the emitted radiation. Additional factors can be found in the complex structure of the CO coma, and non-ideal slit positioning caused by the anisotropy of dust IR emission. We conclude that both CO millimeter and infrared lines do not provide compelling evidence for a distributed source of CO in Hale-Bopps atmosphere.

Dominique Bockele-Morvan; Jrmie Boissier; Nicolas Biver; Jacques Crovisier

2010-01-01T23:59:59.000Z

472

FEASIBILITY OF PRENATAL DIAGNOSIS OF ?-THALASSAEMIA WITH SYNTHETIC DNA PROBES IN TWO MEDITERRANEAN POPULATIONS  

Science Journals Connector (OSTI)

A feasibility study in two Mediterranean populations showed that prenatal diagnosis of ?-thalassaemia with a limited number of synthetic oligonucleotide probes would have been possible in about 70% of cases. To provide a comprehensive programme of prenatal diagnosis for the thalassaemias it would be necessary, in most populations, to combine fetal DNA analysis with fetal blood sampling and globin-chain synthesis studies.

S.L Thein; J.M Old; G Fiorelli; J.S Wainscoat; M Sampietro; R.B Wallace; D.J Weatherall

1985-01-01T23:59:59.000Z

473

Validation of a Novel Immunoassay for the Detection of Synthetic Cannabinoids and Metabolites in Urine Specimens  

Science Journals Connector (OSTI)

......these products over the internet, in gas stations, convenience...appeal as substances of abuse. Pharmacologically...Commonly used drugs of abuse and therapeutic drugs...common substances of abuse, including THC and its...Kleinschmidt K., Schwarz E., Young A. Synthetic cannabinoid......

Amanda Arntson; Bill Ofsa; Denise Lancaster; John R. Simon; Matthew McMullin; Barry Logan

2013-06-01T23:59:59.000Z

474

Development and Investigation of Synthetic Skin Simulant Platform (3SP) in Friction Blister Applications  

E-Print Network [OSTI]

significant opportunity to take a similar approach of applying an engineering viewpoint to repeatably model the onset and formation of blisters on human skin. The authors have developed the Synthetic Skin Simulant Platform (3SP) to fulfill this role. The 3SP...

Guerra, Carlos

2012-02-14T23:59:59.000Z

475

BIODEGRADATION OF COMPOSITE NONWOVENS MADE OF NATURAL FIBERS AND SYNTHETIC POLYMERS  

E-Print Network [OSTI]

1 BIODEGRADATION OF COMPOSITE NONWOVENS MADE OF NATURAL FIBERS AND SYNTHETIC POLYMERS Ioan I Research Center, New Orleans, LA ABSTRACT Composite nonwovens have been prepared from bagasse and cotton-co-terephthalate) and poly(hydroxy butyrate). Some nonwoven compositions have been treated with flame retardants containing

476

Synthetic Analogues of Cysteinate-Ligated Non-Heme Iron and Non-Corrinoid Cobalt Enzymes  

E-Print Network [OSTI]

Synthetic Analogues of Cysteinate-Ligated Non-Heme Iron and Non-Corrinoid Cobalt Enzymes Julie A June 24, 2003 Contents 1. Introduction to Non-Heme Iron Enzymes 825 2. Nitrile Hydratase (NHase) 826 2.1. Enzyme Function 826 2.2. Enzyme Active Site Structure 826 2.3. Spectroscopic Properties 827 2

Kovacs, Julie

477

Effects of potential additives to promote seal swelling on the thermal stability of synthetic jet fuels  

SciTech Connect (OSTI)

Synthetic fuels derived from the Fischer-Tropsch (F-T) process using natural gas or coal-derived synthesis gas as feedstocks can be used for powering of ground vehicles, aircraft and ships. Because of their chemical and physical properties, F-T fuels will probably require additives in order to meet specifications with respect to lubricity and seal swell capability for use in ground and air vehicles. These additives can include oxygenates and compounds containing other heteroatoms that may adversely affect thermal stability. In order to understand what additives will be the most beneficial, a comprehensive experimental and computational study of conventional and additized fuels has been undertaken. The experimental approach includes analysis of the trace oxygenate and nitrogen-containing compounds present in conventional petroleum-derived fuels and trying to relate their presence (or absence) to changes in the desired properties of the fuels. This paper describes the results of efforts to test the thermal stability of synthetic fuels and surrogate fuels containing single-component additives that have been identified in earlier research as the best potential additives for promoting seal swelling in synthetic fuels, as well as mixtures of synthetic and petroleum-derived fuels.

Lind, D.D.; Gormley, R.G.; Zandhuis, P.H.; Baltrus, J.P.

2007-10-01T23:59:59.000Z

478

Making Lasting Bonds Through Synthetic Chemistry Tim Hubin and William Kelly  

E-Print Network [OSTI]

1 Making Lasting Bonds Through Synthetic Chemistry Tim Hubin and William Kelly Southwestern 73096 580-774-3026 tim.hubin@swosu.edu William J. Kelly, Ph. D. Professor and Chair Department-774-3026 william.kelly@swosu.edu 3. Development Staff Proposed: a. Full curriculum development and initial testing

Hubin, Tim

479

Generating Synthetic Meta-data for Georeferenced Video Sakire Arslan Ay  

E-Print Network [OSTI]

to simulate the behavioral patterns of mobile cameras in the synthetic data. The data generation process can the feasibility and applicability of the proposed approach by providing comparisons with real-world data and GIS; H.3.4 [Information Storage and Retrieval]: Systems and Software--Performance eval- uation

Kim, Seon Ho

480

The modeling and the simulation of the fluid machines of synthetic biology  

Science Journals Connector (OSTI)

In the past century, several conceptual and technological breakthroughs produced the digital computers and open the digital information age. At the very same time, the Watson --- Crick model of the digital coding of the genetic information was developed. ... Keywords: (DS)2: dynamical systems with a dynamical structure, MGS, computer modeling, domain specific language (DSL), fluid machines, simulation, spatial computing, synthetic biology, topological rewriting

Jean-Louis Giavitto

2011-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "interferometric synthetic aperture" 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

Novel synthetic phytochelatin-based capacitive biosensor for heavy metal ion detection  

E-Print Network [OSTI]

to increasing levels of diverse pollutants. Heavy metals represent some of the most toxic ones not only to pollution by heavy metals, and is trying to remediate, control and minimize such pollution as muchNovel synthetic phytochelatin-based capacitive biosensor for heavy metal ion detection Ibolya

Chen, Wilfred

482

2000 Special Issue Synthetic brain imaging: grasping, mirror neurons and imitation  

E-Print Network [OSTI]

2000 Special Issue Synthetic brain imaging: grasping, mirror neurons and imitation M.A. Arbiba,b,*, A. Billardb , M. Iacobonic , E. Oztopa,b a USC Brain Project, University of Southern California, Los, CA 90089-2520, USA c Division of Brain Mapping, Neuropsychiatric Institute, UCLA School of Medicine

Oztop, Erhan

483

Synthetic and Mechanistic Chemistry Security at center of chemical and mechanistic  

E-Print Network [OSTI]

. Synthetic chemistry includes work in ligands for catalysts, fission-products separations for isotope. Conducting separations for (1) medical isotope purification and (2) nuclear fuel cycles. Performing of molybdenum-99 (Mo-99) from uranium sulfate solution using a separation flow sheet designed by Argonne

484

Validation of a Novel Immunoassay for the Detection of Synthetic Cannabinoids and Metabolites in Urine Specimens  

Science Journals Connector (OSTI)

......mixed with 0.1% formic acid in water. Two transitions...carryover results worth noting at 5,000...UR-144 pentanoic acid JWH-022-3-OH...synthetic cannabinoid market, it is likely that...oxidized to carboxylic acid metabolites, which......

Amanda Arntson; Bill Ofsa; Denise Lancaster; John R. Simon; Matthew McMullin; Barry Logan

2013-06-01T23:59:59.000Z

485

Co-culture systems and technologies: taking synthetic biology to the next level  

Science Journals Connector (OSTI)

...1. Extracellular environment: a tunable dial The...and synthetic, or to engineer new such interactions...by the extracellular environment, which in turn is...analogy. Just as civil engineers need to consider the...consider the working environment of bio-parts at the...

2014-01-01T23:59:59.000Z

486

Hydrogen and minor element incorporation in synthetic rutile G. D. BROMILEY  

E-Print Network [OSTI]

Hydrogen and minor element incorporation in synthetic rutile G. D. BROMILEY 1,2, * AND N. HILAIRET from substitutional defects. KEYWORDS: rutile, hydrogen, substitution, solubility, spectroscopy of lower- valence cations may be charge-balanced by incorporation of hydrogen in the rutile structure

487

Phosphate Tether-Mediated Synthetic Studies- Applications in Natural Products Synthesis.  

E-Print Network [OSTI]

biological activity, the interesting structural features of these seven-membered bicyclic enol-phosphate triesters, which possess a 7,5-fused butyrolactone ring and chirality at C3, as well as at phosphorus, have identified them as interesting synthetic...

Jayasinghe Mudiyanselage, Susanthi Jayasinghe

2012-08-31T23:59:59.000Z

488

3'-OH LABELLING OF SYNTHETIC OLIGONUCLEOTIDES WITH NUCLEOTIDE ANALOGS TO USE THEM AS NON-RADIOACTIVE PROBES  

E-Print Network [OSTI]

3'-OH LABELLING OF SYNTHETIC OLIGONUCLEOTIDES WITH NUCLEOTIDE ANALOGS TO USE THEM AS NON. They can detect single base pair mismatch (for review, see Itakura et al 1984). Synthetic oligonucleotide probes are anticipated to be increasingly used in future with the easy accessibility to the automated DNA

Paris-Sud XI, Université de

489

Precisely Defined ProteinPolymer Conjugates: Construction of Synthetic DNA Binding Domains on Proteins by Using Multivalent Dendrons  

Science Journals Connector (OSTI)

Precisely Defined ProteinPolymer Conjugates: Construction of Synthetic DNA Binding Domains on Proteins by Using Multivalent Dendrons ... The authors describe the parallel synthesis of a library comprising 146 nanoparticles decorated with different synthetic small mols. ... (a) Newkome, G. R.; Moorefield, C. N.; Vgtle, F. Dendrimers and Dendrons:Concepts, Syntheses, Applications; Wiley-VCH: Weinheim, 2001. ...

Mauri A. Kostiainen; Gza R. Szilvay; Julia Lehtinen; David K. Smith; Markus B. Linder; Arto Urtti; Olli Ikkala

2007-08-25T23:59:59.000Z

490

Differential in vitro cellular response induced by exposure to synthetic vitreous fibers (SVFs) and asbestos crocidolite fibers  

E-Print Network [OSTI]

Differential in vitro cellular response induced by exposure to synthetic vitreous fibers (SVFs the effects of synthetic vitreous fibers (SVFs) on a mesothelial (MeT5A) and a fibroblast cell line (NIH3T3 crocidolite asbestos fibers, SVFs did not induce a significant increase in DNA synthesis. © 2005 Elsevier Inc

Ahmad, Sajjad

491

Design of insulating devices for in vitro synthetic circuits Elisa Franco, Domitilla Del Vecchio and Richard M. Murray  

E-Print Network [OSTI]

Design of insulating devices for in vitro synthetic circuits Elisa Franco, Domitilla Del Vecchio as an insulating device. This circuit is composed of nucleic acids, which can be designed to interact according their functionality. Insulation blocks are crucial to this purpose. Simple direct connection of different synthetic

Murray, Richard M.

492

Po/So Synthetics For A Variety of Oceanic Models and Their Implications For the Structure of the Oceanic Lithosphere  

Science Journals Connector (OSTI)

......realistic oceanic Pn wavetrains, J. geophys. Res., 90, 12755-12776. Sereno T. , Orcutt J., 1987, Synthetic Pn and Sn phases...realistic oceanic Pn wavetrains, 1. geophys. Res., 90, 12755-12776. Sereno, T. & Orcutt, J., 1987. Synthetic Pn and Sn phases......

S. Mallick; L. N. Frazer

1990-02-01T23:59:59.000Z

493

Heat transfer characteristics of impinging steady and synthetic jets over vertical flat surface  

Science Journals Connector (OSTI)

Abstract In this paper, heat transfer characteristics of single-slot impinging steady and synthetic jets on a 25.4-mmנ25.4-mm vertical surface were experimentally investigated. The experiments were conducted with a fixed nozzle width of 1mm. For the steady jet study, the parameters varied in the testing were nozzle length (4mm, 8mm, 12mm, 15mm), Reynolds (Re) number (1002500), and dimensionless nozzle-to-plate spacing (H/Dh=5, 10, 15, 20). Correlations for average Nusselt (Nu) number were developed to accurately describe experimental data. The heat transfer coefficient over a vertical surface increases with increasing Re number. For a small nozzle-to-plate spacing (H/Dh=5), the average Nu number is not only a function of the Re number, but also a function of nozzle length. For large nozzle-to-plate spacing (H/Dh?10) and a nozzle length larger than 8mm, the heat transfer coefficient is insensitive to H/Dh and nozzle length. An 8-mmנ1-mm synthetic jet was studied by varying the applied voltage (20100V), frequency (200600Hz), and dimensionless nozzle-to-plate spacing (H/Dh=5, 10, 15, 20). Compared to the steady jet, the synthetic jet exhibited up to a 40% increase in the heat transfer coefficient. The dynamic Re number was introduced to correlate heat transfer characteristics between synthetic jets and steady jets. Using the dynamic Re number collapses the synthetic and steady jet data into a single Nu number curve.

Xin He; Jason A. Lustbader; Mehmet Arik; Rajdeep Sharma

2015-01-01T23:59:59.000Z

494

A STUDY OF PULSE-ECHO IMAGE FORMATION USING NON-QUADRATIC  

E-Print Network [OSTI]

techniques (e.g., B-mode and synthetic aperture focusing techniques (SAFT)). Methodology: Two- dimensional. INTRODUCTION B-mode, synthetic aperture focusing techniques (SAFT) and array imaging have been studied

Illinois at Urbana-Champaign, University of

495

arXiv:1101.0723v1[q-bio.MN]4Jan2011 Bistability of an In Vitro Synthetic Autoregulatory Switch  

E-Print Network [OSTI]

synthetic DNA strands and three enzymes, bacteriophage T7 RNA polymerase, Escherichia coli ribonuclease of a synthetic DNA switch regulated by its RNA output acting as a transcription activator. We verifiedarXiv:1101.0723v1[q-bio.MN]4Jan2011 Bistability of an In Vitro Synthetic Autoregulatory Switch

Winfree, Erik

496

Section III-F. Exempt Experiments The following recombinant or synthetic nucleic acid molecules are exempt from the NIH Guidelines and  

E-Print Network [OSTI]

a transposable element, provided the transposable element does not contain any recombinant and/or synthetic DNA or synthetic nucleic acid molecules that consist entirely of DNA segments from different species that exchange DNA by known physiological processes, though one or more of the segments may be a synthetic equivalent

Borenstein, Elhanan

497

Biochem. J. (1987) 246, 227-232 (Printed in Great Britain) The binding of the cyclic AMP receptor protein to synthetic DNA  

E-Print Network [OSTI]

protein to synthetic DNA sites containing permutations in the consensus sequence TGTGA Claudia JANSEN synthetic DNA-binding sites was investigated with a gel-retardation assay. A set of ten different sequences of synthetic-DNA binding sites. First, we show that a completely symmetric site binds better to CRP than

Clore, G. Marius

498

Characterization of a Putative Ovarian Oncogene, Elongation Factor 1?, Isolated by Panning a Synthetic Phage Display Single-Chain Variable Fragment Library with Cultured Human Ovarian Cancer Cells  

Science Journals Connector (OSTI)

...A synthetic scFv phage library is initially constructed...of synthetic phage scFv library with ovarian cancer cells. The synthetic phage scFv library (1 1013 transducing units...prepared from the periplasmic space of individual colonies...

Sameer Sharma; Jonathan Tammela; Xinhui Wang; Hilal Arnouk; Deborah Driscoll; Paulette Mhawech-Fauceglia; Shashikant Lele; A. Latif Kazim; and Kunle Odunsi

2007-10-01T23:59:59.000Z

499

Self-organizing molecular photonic structures based on functionalized synthetic nucleic acid (DNA) polymers  

Science Journals Connector (OSTI)

Work has been carried out with the objective of imparting the electronic/photonic property of extended Forster energy transfer into organized structures formed by the programmed self-assembly of synthetic nucleic acid units (fluorescent oligonucleotides and polynucleotides). Forster energy transfer is a non-radiative process by which a fluorescent donor molecule excited at one wavelength is able to transfer its absorbed photonic energy efficiently to a fluorescent acceptor molecule, in close proximity, which then re-emits it at a second wavelength. An extended energy transfer system, with multiple donor molecules, could be considered a molecular photonic antenna or amplifier structure. Relatively efficient extended Forster energy transfer was observed in initial experiments involving multiple fluorescent donor and acceptor oligonucleotides. These results provide a clear demonstration of totally synthetic molecules, with highly specific programmable self-assembling properties, organizing into molecular structures with useful electronic/photonic properties.

M J Heller; R H Tullis

1991-01-01T23:59:59.000Z

500

Structure and photoinduced electron transfer in exceptionally stable synthetic DNA hairpins with stilbenediether linkers  

SciTech Connect (OSTI)

Bis(oligonucleotide) conjugates with synthetic linkers connecting short complementary oligonucleotides are known to form synthetic DNA or RNA hairpins which are, in some cases, more stable than natural hairpins which possess oligonucleotide linkers. The authors report here that conjugates possessing stilbenediether (SE) linkers form exceptionally stable (poly)dT-SE-(poly)dA hairpins. The crystal structure of a Se-bridged hairpin confirms that it adopts a B-form structure in which the stilbene is {pi}-stacked with the adjacent base pair. The stilbenediether also mediates novel lattice interactions that are distinct from those normally found in DNA crystals. The singlet excited state of the stilbenediether is a strong electron donor which is rapidly quenched by either neighboring dT-dA or dC-dG base pairs which function as electron acceptors. This behavior is complementary to that of conjugates possessing a stilbenedicarboxamide linker (SA, Chart 1), which serves as an electron acceptor.

Lewis, F.D.; Liu, X.; Wu, Y. [and others

1999-10-27T23:59:59.000Z