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1

Field Techniques | Open Energy Information  

Open Energy Info (EERE)

Field Techniques Field Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Field Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Field Techniques Exploration Sub Group: None Parent Exploration Technique: Exploration Techniques Information Provided by Technique Lithology: Map surface geology and hydrothermal alteration. Rock samples are used to define lithology. Field and lab analyses can be used to measure the chemical and isotopic constituents of rock samples. Bulk and trace element analysis of rocks, minerals, and sediments. Identify and document surface geology and mineralogy. Rapid and unambiguous identification of unknown minerals.[1] Stratigraphic/Structural: Locates active faults in the area of interest. Map fault and fracture patterns, kinematic information. Can reveal relatively high permeability zones. Provides information about the time and environment which formed a particular geologic unit. Microscopic rock textures can be used to estimate the history of stress and strain, and/or faulting.

2

Field observations and lessons learned  

SciTech Connect

This presentation outlines observations and lessons learned from the Megaports program. It provides: (1) details of field and technical observations collected during LANL field activities at ports around the world and details of observations collected during radiation detections system testing at Los Alamos National Laboratory; (2) provides suggestions for improvement and efficiency; and (3) discusses possible program execution changes for more effective operations.

Nielsen, Joh B [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

3

Category:Field Techniques | Open Energy Information  

Open Energy Info (EERE)

Field Techniques Field Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Field Techniques page? For detailed information on Field Techniques as exploration techniques, click here. Category:Field Techniques Add.png Add a new Field Techniques Technique Subcategories This category has the following 2 subcategories, out of 2 total. D [×] Data Collection and Mapping‎ 5 pages F [+] Field Sampling‎ (2 categories) 4 pages Pages in category "Field Techniques" The following 4 pages are in this category, out of 4 total. D Data Collection and Mapping F Field Sampling H Hand-held X-Ray Fluorescence (XRF) P Portable X-Ray Diffraction (XRD) Retrieved from "http://en.openei.org/w/index.php?title=Category:Field_Techniques&oldid=689815"

4

OBSERVATION OF DIPOLAR FERROMAGNETISM BY TEM TECHNIQUES.  

Science Conference Proceedings (OSTI)

Magnetostatic interactions play a central role in determining the magnetic response of an array of patterned magnetic elements or magnetized nanoparticles of given shape. The Fourier space approach recently introduced for the analytical computation of the demagnetizing tensor, field and energy for particles of arbitrary shape [1], has been recently extended to cover interactions between elements [2]. The main achievement has been the definition of a generalized dipole-dipole interaction for cylindrical objects, which takes into account the influence of shape anisotropy without resorting to,any kind of approximations [3]. Once the interaction energy is available, it becomes possible to evaluate the minimum energy state of the system for a given set of external parameters (such as applied field, aspect ratio, distance between elements). It turns out that, below a critical combination of aspect ratios and distances, the system undergoes a phase transition, changing abruptly from a closure domain state, with zero net magnetization, to a dipolar ferromagnetic state with a net magnetization which depends on the interaction strength between the elements. In order to observe this phenomenon by TEM, it is necessary to estimate the feasibility of the experiment by a series of simulations. Figure 1 shows the electron optical phase shifts for the system of three weakly (a-c) and strongly (d) interacting disks. The elements have a radius of 50 nm, a thickness of 5 nm (aspect ratio 1/20), and are uniformly magnetized at 2 T. By comparing Fig.1 (c) and (d), it can be seen that the fingerprint of the transition is the presence of fringing fields around the elements, revealed by the cosine fringes which resemble a dipole-like field in (d). When the system is in the closure-domain state, as in (a-c), no fringing field can be observed on a large scale. Figure 2 shows a set of Fresnel images, calculated for the same configurations as in Fig.1. As the Fresnel technique is scarcely sensitive to fringing fields, their effect is not evident in the images. However, by following the bright and dark contrast features in each image, a change in magnetization can be deduced, also when the electrostatic phase shift proportional to the thickness is taken into account. An alternative, more indirect, opportunity to observe the transition is granted by hysteresis loops. Figure 3 shows calculated hysteresis curves for non-interacting (a), weakly interacting (b) and strongly interacting (c) disks. The applied field is in-plane, along one of the triangular symmetry axis (0{sup o}, 60{sup o} or 120{sup o}). The transition is revealed by a remnant magnetization in zero field (c), contrary to the behavior of the weak interaction (b). Dipolar ferromagnetism can, therefore, be successfully investigated by TEM, where at least three different techniques, phase retrieval, phase contrast, and in-situ hysteresis experiments, are available for detecting the phase transition [4].

BELEGGIA, M.ZHU,Y.TANDON,S.ET AL.

2004-08-01T23:59:59.000Z

5

CMB Observational Techniques and Recent Results  

E-Print Network (OSTI)

The Cosmic Microwave Background (CMB) consists of photons that were last created about 2 months after the Big Bang, and last scattered about 380,000 years after the Big Bang. The spectrum of the CMB is very close to a blackbody at 2.725 K and upper limits on any deviations of the CMB from a blackbody place strong constraints on energy transfer between the CMB and matter at all redshifts less than 2,000,000. The CMB is very nearly isotropic, but a dipole anisotropy of +/-3.346(17) mK shows that the Solar System barycenter is moving at 368+/-2 km/sec relative to the observable Universe. The dipole corresponds to a spherical harmonic index l=1. The higher indices l geq 2 indicate intrinsic inhomogeneities in the Universe that existed at the time of last scattering. While the photons have traveled freely only since the time of last scattering, the inhomogeneities traced by the CMB photons have been in place since the inflationary epoch only 10^{-35} sec after the Big Bang. These intrinsic anisotropies are much smaller in amplitude than the dipole anisotropy, with Delta T leq 100 microK. Electron scattering of the anisotropic radiation field produces an anisotropic linear polarization in the CMB with amplitudes less than 5 microK. Detailed studies of the angular power spectrum of the temperature and linear polarization anisotropies have yielded precise values for many cosmological parameters. This paper will discuss the techniques necessary to measure signals that are 100 million times smaller than the emission from the instrument and briefly describe results from experiments up to WMAP.

E. L. Wright

2003-12-31T23:59:59.000Z

6

Digital Geologic Field Mapping Using Arcpad, In: Digital Mapping Techniques  

Open Energy Info (EERE)

Digital Geologic Field Mapping Using Arcpad, In: Digital Mapping Techniques Digital Geologic Field Mapping Using Arcpad, In: Digital Mapping Techniques '02- Workshop Proceedings Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Digital Geologic Field Mapping Using Arcpad, In: Digital Mapping Techniques '02- Workshop Proceedings Abstract Research into the practicality of digital mapping by Placer Dome Exploration identified hardware and software solutions to enhance the efficiency and accuracy of field work. The goal of the research was to find a lightweight hardware-software system that allows the user to build a digital map from field observations in much the same way as pen and paper methods. The focus of the research was to minimize the size and weight of computer systems. Systems identified consist of a wearable PC or handheld

7

Improved modeling techniques for turbomachinery flow fields  

DOE Green Energy (OSTI)

This program has the objective of developing an improved methodology for modeling turbomachinery flow fields, including the prediction of losses and efficiency. Specifically, the program addresses the treatment of the mixing stress tensor terms attributed to deterministic flow field mechanisms required in steady-state Computational Fluid Dynamic (CFD) models for turbomachinery flow fields. These mixing stress tensors arise due to spatial and temporal fluctuations (in an absolute frame of reference) caused by rotor-stator interaction due to various blade rows and by blade-to-blade variation of flow properties. This will be accomplished in a cooperative program by Penn State University and the Allison Engine Company. These tasks include the acquisition of previously unavailable experimental data in a high-speed turbomachinery environment, the use of advanced techniques to analyze the data, and the development of a methodology to treat the deterministic component of the mixing stress tenor.

Lakshminarayana, B.; Fagan, J.R. Jr.

1995-12-31T23:59:59.000Z

8

A Field-Coherence Technique for Meteorological Field-Program Design for Air Quality Studies. Part I: Description and Interpretation  

Science Conference Proceedings (OSTI)

This paper describes a new methodology developed to provide objective guidance for cost-effective siting of meteorological observations on the mesoscale for air quality applications. This field-coherence technique (FCT) is based on a statistical ...

David R. Stauffer; Nelson L. Seaman; Glenn K. Hunter; S. Mark Leidner; Annette Lario-Gibbs; Saffet Tanrikulu

2000-03-01T23:59:59.000Z

9

Coastal Underwater Field Observer with Remote IP Access  

E-Print Network (OSTI)

Coastal Underwater Field Observer with Remote IP Access Joe Wilinski, Aaron Ganick, Alexander with continuous use of batteries. Costal Underwater Field Observer 9/16/09 #12;Boston University Slideshow Title? Wide angle Zoom Costal Underwater Field Observer #12;Boston University Slideshow Title Goes Here

Goldberg, Bennett

10

POLAR FIELD REVERSAL OBSERVATIONS WITH HINODE  

Science Conference Proceedings (OSTI)

We have been monitoring yearly variation in the Sun's polar magnetic fields with the Solar Optical Telescope aboard Hinode to record their evolution and expected reversal near the solar maximum. All magnetic patches in the magnetic flux maps are automatically identified to obtain the number density and magnetic flux density as a function of the total magnetic flux per patch. The detected magnetic flux per patch ranges over four orders of magnitude (10{sup 15}-10{sup 20} Mx). The higher end of the magnetic flux in the polar regions is about one order of magnitude larger than that of the quiet Sun, and nearly that of pores. Almost all large patches ({>=}10{sup 18} Mx) have the same polarity, while smaller patches have a fair balance of both polarities. The polarity of the polar region as a whole is consequently determined only by the large magnetic concentrations. A clear decrease in the net flux of the polar region is detected in the slow rising phase of the current solar cycle. The decrease is more rapid in the north polar region than in the south. The decrease in the net flux is caused by a decrease in the number and size of the large flux concentrations as well as the appearance of patches with opposite polarity at lower latitudes. In contrast, we do not see temporal change in the magnetic flux associated with the smaller patches (<10{sup 18} Mx) and that of the horizontal magnetic fields during the years 2008-2012.

Shiota, D. [Advanced Science Institute, RIKEN (Institute of Physics and Chemical Research), Wako, Saitama 351-0198 (Japan); Tsuneta, S.; Shimojo, M.; Orozco Suarez, D.; Ishikawa, R. [National Astronomical Observatory of Japan (NAOJ), Mitaka, Tokyo 181-8588 (Japan); Sako, N., E-mail: shiota@riken.jp [Department of Astronomical Science, The Graduate University for Advanced Studies, Mitaka, Tokyo 181-8588 (Japan)

2012-07-10T23:59:59.000Z

11

Distant-observer techniques for verification of solar-concentrator optical geometry  

SciTech Connect

Existing methods for testing the geometric accuracy of parabolic trough concentrators are too slow and require too much hardware and system downtime to be of use in field testing of large industrial solar installations. Distant observer techniques are developed to permit a variety of in the field tests to be made quickly and with very little equipment. Diagnostic procedures for most correctable faults are discussed.

Wood, R.L.

1981-10-30T23:59:59.000Z

12

AAO support observations for the Hubble Deep Field Sout  

E-Print Network (OSTI)

We present proposed ground-based support observations at the AAO for the forthcoming Hubble Deep Field South (HDF-S) campaign.

B. J. Boyle

1998-04-09T23:59:59.000Z

13

Springtime Photochemical Air Pollution in Osaka: Field Observation  

Science Conference Proceedings (OSTI)

High concentrations of nitrogen dioxide are frequently observed in the Osaka area in the spring. To clarify the mechanism of springtime air pollution formation, a series of three-dimensional field observations was conducted in April 1993 covering ...

Shinji Wakamatsu; Itsushi Uno; Toshimasa Ohara

1998-10-01T23:59:59.000Z

14

Mapping Diffuse Seismicity Using Empirical Matched Field Processing Techniques  

DOE Green Energy (OSTI)

The objective of this project is to detect and locate more microearthquakes using the empirical matched field processing (MFP) method than can be detected using only conventional earthquake detection techniques. We propose that empirical MFP can complement existing catalogs and techniques. We test our method on continuous seismic data collected at the Salton Sea Geothermal Field during November 2009 and January 2010. In the Southern California Earthquake Data Center (SCEDC) earthquake catalog, 619 events were identified in our study area during this time frame and our MFP technique identified 1094 events. Therefore, we believe that the empirical MFP method combined with conventional methods significantly improves the network detection ability in an efficient matter.

Wang, J; Templeton, D C; Harris, D B

2011-01-21T23:59:59.000Z

15

Simple microwave field imaging technique using hot atomic vapor cells  

E-Print Network (OSTI)

We demonstrate a simple technique for microwave field imaging using alkali atoms in a vapor cell. The microwave field to be measured drives Rabi oscillations on atomic hyperfine transitions, which are detected in a spatially resolved way using a laser beam and a CCD camera. Our vapor cell geometry enables single-shot recording of two-dimensional microwave field images with 350 {\\mu}m spatial resolution. Using microfabricated vapor cell arrays, a resolution of a few micrometers seems feasible. All vector components of the microwave magnetic field can be imaged. Our apparatus is simple and compact and does not require cryogenics or ultra-high vacuum.

Bhi, Pascal

2012-01-01T23:59:59.000Z

16

Simple microwave field imaging technique using hot atomic vapor cells  

E-Print Network (OSTI)

We demonstrate a simple technique for microwave field imaging using alkali atoms in a vapor cell. The microwave field to be measured drives Rabi oscillations on atomic hyperfine transitions, which are detected in a spatially resolved way using a laser beam and a camera. Our vapor cell geometry enables single-shot recording of two-dimensional microwave field images with 350 {\\mu}m spatial resolution. Using microfabricated vapor cell arrays, a resolution of a few micrometers seems feasible. All vector components of the microwave magnetic field can be imaged. Our apparatus is simple and compact and does not require cryogenics or ultra-high vacuum.

Pascal Bhi; Philipp Treutlein

2012-07-20T23:59:59.000Z

17

Observation of low magnetic field density peaks in helicon plasma  

SciTech Connect

Single density peak has been commonly observed in low magnetic field (<100 G) helicon discharges. In this paper, we report the observations of multiple density peaks in low magnetic field (<100 G) helicon discharges produced in the linear helicon plasma device [Barada et al., Rev. Sci. Instrum. 83, 063501 (2012)]. Experiments are carried out using argon gas with m = +1 right helical antenna operating at 13.56 MHz by varying the magnetic field from 0 G to 100 G. The plasma density varies with varying the magnetic field at constant input power and gas pressure and reaches to its peak value at a magnetic field value of {approx}25 G. Another peak of smaller magnitude in density has been observed near 50 G. Measurement of amplitude and phase of the axial component of the wave using magnetic probes for two magnetic field values corresponding to the observed density peaks indicated the existence of radial modes. Measured parallel wave number together with the estimated perpendicular wave number suggests oblique mode propagation of helicon waves along the resonance cone boundary for these magnetic field values. Further, the observations of larger floating potential fluctuations measured with Langmuir probes at those magnetic field values indicate that near resonance cone boundary; these electrostatic fluctuations take energy from helicon wave and dump power to the plasma causing density peaks.

Barada, Kshitish K.; Chattopadhyay, P. K.; Ghosh, J.; Kumar, Sunil; Saxena, Y. C. [Institute for Plasma Research, Bhat, Gandhinagar 382428 (India)

2013-04-15T23:59:59.000Z

18

Development of Improved Oil Field Waste Injection Disposal Techniques  

Science Conference Proceedings (OSTI)

The goals of this DOE sponsored project are to: (1) assemble and analyze a comprehensive database of past waste injection operations; (2) develop improved diagnostic techniques for monitoring fracture growth and formation changes; (3) develop operating guidelines to optimize daily operations and ultimate storage capacity of the target formation; and (4) to test these improved models and guidelines in the field.

Terralog Technologies USA Inc.

2001-12-17T23:59:59.000Z

19

Development of Improved Oil Field Waste Injection Disposal Techniques  

Science Conference Proceedings (OSTI)

The goals of this project have was to: (1) assemble and analyze a comprehensive database of past waste injection operations; (2) develop improved diagnostic techniques for monitoring fracture growth and formation changes; (3) develop operating guidelines to optimize daily operations and ultimate storage capacity of the target formation; and (4) to apply these improved models and guidelines in the field.

Terralog Technologies

2002-11-25T23:59:59.000Z

20

Temporal Velocity Variations beneath the Coso Geothermal Field Observed  

Open Energy Info (EERE)

Velocity Variations beneath the Coso Geothermal Field Observed Velocity Variations beneath the Coso Geothermal Field Observed using Seismic Double Difference Tomography of Compressional and Shear Wave Arrival Times Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Temporal Velocity Variations beneath the Coso Geothermal Field Observed using Seismic Double Difference Tomography of Compressional and Shear Wave Arrival Times Details Activities (1) Areas (1) Regions (0) Abstract: Microseismic imaging can be an important tool for characterizing geothermal reservoirs. Since microseismic sources occur more or less continuously both due to the operations of a geothermal field and the naturally occurring background seismicity, passive seismic monitoring is well suited to quantify the temporal variations in the vicinity of a

Note: This page contains sample records for the topic "field techniques observation" 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

Statistical techniques for the characterization of partially observed epidemics.  

Science Conference Proceedings (OSTI)

Techniques appear promising to construct and integrate automated detect-and-characterize technique for epidemics - Working off biosurveillance data, and provides information on the particular/ongoing outbreak. Potential use - in crisis management and planning, resource allocation - Parameter estimation capability ideal for providing the input parameters into an agent-based model, Index Cases, Time of Infection, infection rate. Non-communicable diseases are easier than communicable ones - Small anthrax can be characterized well with 7-10 days of data, post-detection; plague takes longer, Large attacks are very easy.

Safta, Cosmin; Ray, Jaideep; Crary, David (Applied Research Associates, Inc, Arlington, VA); Cheng, Karen (Applied Research Associates, Inc, Arlington, VA)

2010-11-01T23:59:59.000Z

22

FIELD OBSERVATIONS OF GAS-CONDENSATE WELL TESTING  

E-Print Network (OSTI)

, a commercial simulator was used to perform phase- equilibrium and property calculations based on the PengFIELD OBSERVATIONS OF GAS- CONDENSATE WELL TESTING A REPORT SUBMITTED TO THE DEPARTMENT OF ENERGY-point pressure is impacted severely due to condensate banking around the wellbore. Condensate banking also

23

Techniques and Technologies for Field Detection of Asbestos Containing Materials  

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

DOE-Environmental Management DOE-Complex Wide Techniques and Technologies for Field Detection of Asbestos Containing Materials Challenge Asbestos has been used in numerous applications at DOE sites including sprayed-on fireproofing, asphalt and vinyl floor tile, and asbestos-cement (transite) siding. Inhalation of asbestos can result in non-malignant asbestosis, lung cancer and mesothelioma in workers. Currently, 40 CFR 763, Subpart E requires a certain number of bulk samples of suspected asbestos-containing material (ACM) to be collected within each designated homogeneous area (HA). If real time (or near-real), in-situ detection techniques/technologies of  5, and preferably  3 weight percent asbestos, were available, sample numbers

24

A Lagrangian Objective Analysis Technique for Assimilating In Situ Observations with Multiple-Radar-Derived Airflow  

Science Conference Proceedings (OSTI)

A new Lagrangian analysis technique is developed to assimilate in situ boundary layer measurements using multi-Doppler-derived wind fields, providing output fields of water vapor mixing ratio, potential temperature, and virtual potential ...

Conrad L. Ziegler; Michael S. Buban; Erik N. Rasmussen

2007-07-01T23:59:59.000Z

25

ARM - Field Campaign - Routine AAF CLOWD Optical Radiative Observations  

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

govCampaignsRoutine AAF CLOWD Optical Radiative Observations (RACORO) govCampaignsRoutine AAF CLOWD Optical Radiative Observations (RACORO) Campaign Links RACORO Website Related Campaigns Surface Radiation Comparison Transfer Measurements for RACORO 2009.01.20, Long, SGP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Routine AAF CLOWD Optical Radiative Observations (RACORO) 2009.01.22 - 2009.06.30 Website : http://acrf-campaign.arm.gov/racoro/ Lead Scientist : Andrew Vogelmann For data sets, see below. Description The ARM Aerial Facility (AAF) supported the Routine AAF Clouds with Low Optical Water Depths (CLOWD) Optical Radiative Observations (RACORO) field campaign, led by principal investigator Andrew Vogelmann. During this long-term campaign, the AAF conducted routine flights at the ACRF Southern

26

ARM - Field Campaign - Biomass Burning Observation Project - BBOP  

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

govCampaignsBiomass Burning Observation Project - BBOP govCampaignsBiomass Burning Observation Project - BBOP Campaign Links BNL BBOP Website ARM Aerial Facility Payload Science Plan Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Biomass Burning Observation Project - BBOP 2013.07.01 - 2013.10.24 Website : http://campaign.arm.gov/bbop/ Lead Scientist : Larry Kleinman For data sets, see below. Description This field campaign will address multiple uncertainties in aerosol intensive properties, which are poorly represented in climate models, by means of aircraft measurements in biomass burning plumes. Key topics to be investigated are: Aerosol mixing state and morphology Mass absorption coefficients (MACs) Chemical composition of non-refractory material associated with

27

Chemical telemetry of OH observed to measure interstellar magnetic fields  

E-Print Network (OSTI)

We present models for the chemistry in gas moving towards the ionization front of an HII region. When it is far from the ionization front, the gas is highly depleted of elements more massive than helium. However, as it approaches the ionization front, ices are destroyed and species formed on the grain surfaces are injected into the gas phase. Photodissociation removes gas phase molecular species as the gas flows towards the ionization front. We identify models for which the OH column densities are comparable to those measured in observations undertaken to study the magnetic fields in star forming regions and give results for the column densities of other species that should be abundant if the observed OH arises through a combination of the liberation of H2O from surfaces and photodissociation. They include CH3OH, H2CO, and H2S. Observations of these other species may help establish the nature of the OH spatial distribution in the clouds, which is important for the interpretation of the magnetic field results.

S. Viti; T. W. Hartquist; P. C. Myers

2005-10-04T23:59:59.000Z

28

A Technique for Estimating Outgoing Longwave Radiation from HIRS Radiance Observations  

Science Conference Proceedings (OSTI)

A new technique for estimating outgoing longwave radiation from observations on the NOAA operational satellites has been developed from a regression analysis of radiation model calculations. The technique consists of a weighted sum of radiance in ...

Robert G. Ellingson; David J. Yanuk; Hai-Tien Lee; Arnold Gruber

1989-08-01T23:59:59.000Z

29

The Sun's Global Photospheric and Coronal Magnetic Fields: Observations and Models  

E-Print Network (OSTI)

In this review, our present day understanding of the Sun's global photospheric and coronal magnetic fields is discussed from both observational and theoretical viewpoints. Firstly, the large-scale properties of photospheric magnetic fields are described, along with recent advances in photospheric magnetic flux transport models. Following this, the wide variety of theoretical models used to simulate global coronal magnetic fields are described. From this, the combined application of both magnetic flux transport simulations and coronal modeling techniques to describe the phenomena of coronal holes, the Sun's open magnetic flux and the hemispheric pattern of solar filaments is discussed. Finally, recent advances in non-eruptive global MHD models are described. While the review focuses mainly on solar magnetic fields, recent advances in measuring and modeling stellar magnetic fields are described where appropriate. In the final section key areas of future research are identified.

Mackay, D H

2012-01-01T23:59:59.000Z

30

Application of oil-field well log interpretation techniques to the Cerro Prieto Geothermal Field  

DOE Green Energy (OSTI)

An example is presented of the application of oil-field techniques to the Cerro Prieto Field, Mexico. The lithology in this field (sand-shale lithology) is relatively similar to oil-field systems. The study was undertaken as a part of the first series of case studies supported by the Geothermal Log Interpretation Program (GLIP) of the US Department of Energy. The suites of logs for individual wells were far from complete. This was partly because of adverse borehole conditions but mostly because of unavailability of high-temperature tools. The most complete set of logs was a combination of Dual Induction Laterolog, Compensated Formation Density Gamma Ray, Compensated Neutron Log, and Saraband. Temperature data about the wells were sketchy, and the logs had been run under pre-cooled mud condition. A system of interpretation consisting of a combination of graphic and numerical studies was used to study the logs. From graphical studies, evidence of hydrothermal alteration may be established from the trend analysis of SP (self potential) and ILD (deep induction log). Furthermore, the cross plot techniques using data from density and neutron logs may help in establishing compaction as well as rock density profile with depth. In the numerical method, R/sub wa/ values from three different resistivity logs were computed and brought into agreement. From this approach, values of formation temperature and mud filtrate resistivity effective at the time of logging were established.

Ershaghi, I.; Phillips, L.B.; Dougherty, E.L.; Handy, L.L.

1979-10-01T23:59:59.000Z

31

Mean field spin glasses treated with PDE techniques  

E-Print Network (OSTI)

Following an original idea of F. Guerra, in this notes we analyze the Sherrington-Kirkpatrick model from different perspectives, all sharing the underlying approach which consists in linking the resolution of the statistical mechanics of the model (e.g. solving for the free energy) to well-known partial differential equation (PDE) problems (in suitable spaces). The plan is then to solve the related PDE using techniques involved in their native field and lastly bringing back the solution in the proper statistical mechanics framework. Within this strand, after a streamlined test-case on the Curie-Weiss model to highlight the methods more than the physics behind, we solve the SK both at the replica symmetric and at the 1-RSB level, obtaining the correct expression for the free energy via an analogy to a Fourier equation and for the self-consistencies with an analogy to a Burger equation, whose shock wave develops exactly at critical noise level (triggering the phase transition). Our approach, beyond acting as a new alternative method (with respect to the standard routes) for tackling the complexity of spin glasses, links symmetries in PDE theory with constraints in statistical mechanics and, as a novel result from the theoretical physics perspective, we obtain a new class of polynomial identities (namely of Aizenman-Contucci type but merged within the Guerra's broken replica measures), whose interest lies in understanding, via the recent Panchenko breakthroughs, how to force the overlap organization to the ultrametric tree predicted by Parisi.

Adriano Barra; Gino Del Ferraro; Daniele Tantari

2013-04-09T23:59:59.000Z

32

Picosecond Electric Field CARS; A Diagnostic Technique to Measure the Electric Field Development within Nanosecond Repetitively Pulsed Plasmas.  

E-Print Network (OSTI)

??In this thesis, a novel technique is presented to take measurements of an electric field which develops and changes rapidly in time. The motivation arises (more)

Goldberg, Benjamin M.

2012-01-01T23:59:59.000Z

33

Some field observations on OSI aerial photography scales  

SciTech Connect

The US, UK and USSR are attempting to negotiate a Comprehensive Test Ban Treaty (CTBT) in Geneva. One of the verification procedures presently proposed provides for the possibility of conducting an On-Site Inspection (OSI) if a violation is suspected. According to the terms of the draft treaty, the OSI team would be provided with either (1) stereoscopic aerial photographs with a scale of 1:2,500, or equivalent topographic maps (US version) or (2) a large scale aerial photograph (USSR version). In order to gain a better understanding of the aerial photograph issue, EG and G was asked to take stereoscopic aerial photographs of two areas at the NTS at four different scales, 1:2,500, 1:5,000, 1:10,000 and 1:25,000. The purpose of this paper is to present some field observations on the use for OSI type purposes of these different scale photos.

Geil, R.

1981-03-16T23:59:59.000Z

34

A novel technique for wide-field polarimetry with a radiotelescope array  

E-Print Network (OSTI)

We report the use of the Australia Telescope Compact Array (ATCA) to conduct polarimetric observations of the sky at 5 GHz. The ATCA is normally operated as an interferometer array, but these observations were conducted in a split array mode in which the antenna elements were used as single-dishes with their beams staggered to simultaneously cover a wide area of sky with a resolution of 10 arcmin. The linearly polarized sky radiation was fully characterized from measurements, made over a range of parallactic angles, of the cross correlated signals from the orthogonal linear feeds. We describe the technique and present a polarimetric image of the Vela supernova remnant made as a test of the method. The development of the techniques was motivated by the need for wide-field imaging of the foreground contamination of the polarized component of the cosmic microwave background signal.

D. McConnell; E. Carretti; R. Subrahmanyan

2005-11-04T23:59:59.000Z

35

Antenna Parameter Measurement by Near-Field Techniques  

Science Conference Proceedings (OSTI)

... Lab Tour. Thursday, September 20th. ... Lab Tour. September 20th. Ron Wittmann (Spherical Near-Field Theory); Michael Francis (Uncertainty Analysis ...

2012-04-25T23:59:59.000Z

36

A Differential Reflectivity Radar Hall Measurement Technique: Observations during the Denver Hailstorm of 13 June 1984  

Science Conference Proceedings (OSTI)

A differential reflectivity radar technique for observing hailstorms is demonstrated using measurements obtained during the 13 June 1984 Denver hailstorm. The hail regions of the storm are identified with the differential reflectivity hail ...

K. Aydin; Y. Zhao; T. A. Seliga

1990-02-01T23:59:59.000Z

37

A Field-Coherence Technique for Meteorological Field-Program Design for Air Quality Studies. Part II: Evaluation in the San Joaquin Valley  

Science Conference Proceedings (OSTI)

In Part I of this paper, a field-coherence technique (FCT) was developed to provide objective guidance for cost-effective siting of meteorological observations on the mesoscale for air quality applications. The FCT is evaluated here in Part II ...

Saffet Tanrikulu; David R. Stauffer; Nelson L. Seaman; Andrew J. Ranzieri

2000-03-01T23:59:59.000Z

38

ARM - Field Campaign - Water Cycle Pilot Study Intensive Observations  

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

govCampaignsWater Cycle Pilot Study Intensive Observations govCampaignsWater Cycle Pilot Study Intensive Observations Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Water Cycle Pilot Study Intensive Observations 2002.04.01 - 2002.06.30 Lead Scientist : Marvin Wesely For data sets, see below. Description The U.S. DOE Water Cycle Pilot Study (WCPS) is a 3-year feasibility investigation focused on accurately evaluating the water cycle components and using stable isotopes as an effective tool in doing so. The study area is primarily the Whitewater subbasin in the Walnut River Watershed in southeastern Kansas. Two intensive observations periods are planned, this first one in April to June 2002 and a second currently scheduled for December 2002 to February 2003. Observations will be made of precipitation

39

ARM - Field Campaign - Observations and Modeling of the Green...  

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

of the Green Ocean Amazon: Year-to-Year Differences (GOAMAZON 2015) 2015.01.01, Martin, AMF Observations and Modeling of the Green Ocean Amazon Aerial Campaign 2014.02.15,...

40

ARM - Field Campaign - The ARM Pilot Radiation Observation Experiment...  

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

govCampaignsThe ARM Pilot Radiation Observation Experiment (PROBE) Comments? We would love to hear from you Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : The...

Note: This page contains sample records for the topic "field techniques observation" 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

Geomagnetic Field Effects on the Imaging Air Shower Cherenkov Technique  

E-Print Network (OSTI)

Imaging Air Cherenkov Telescopes (IACTs) detect the Cherenkov light flashes of Extended Air Showers (EAS) triggered by very high energy (VHE) gamma-rays impinging on the Earth's atmosphere. Due to the overwhelming background from hadron induced EAS, the discrimination of the rare gamma-like events is rather difficult, in particular at energies below 100 GeV. The influence of the Geomagnetic Field (GF) on the EAS development can further complicate this discrimination and, in addition, also systematically affect the gamma efficiency and energy resolution of an IACT. Here we present the results from dedicated Monte Carlo (MC) simulations for the MAGIC telescope site. Additionally we show that measurements of sub-TeV gamma-rays from the Crab nebula are affected even for a low GF strength of less than 33 micro Tesla.

S. C. Commichau; A. Biland; D. Kranich; R. de los Reyes; A. Moralejo; D. Sobczynska

2007-09-10T23:59:59.000Z

42

A Cirrus-Cloud Experiment: Intensive Field Observations Planned for Fire  

Science Conference Proceedings (OSTI)

Plans for an intensive cirrus-cloud field experiment are described. The Cirrus Intensive Field Observations (Citrus IFO) is a major component of the First ISCCP (International Satellite Cloud Climatology Project) Regional Experiment (FIRE). The ...

David O'C. Starr

1987-02-01T23:59:59.000Z

43

A Diabatic Lagrangian Technique for the Analysis of Convective Storms. Part II: Application to a radar-observed storm  

Science Conference Proceedings (OSTI)

A new diabatic Lagrangian analysis (DLA) technique that derives predicted fields of potential temperature, water vapor and cloud water mixing ratios, and virtual buoyancy from three-dimensional, time-dependent wind and reflectivity fields (see ...

Conrad L. Ziegler

44

A Dosimetric Analysis of IMRT and Multistatic Fields Techniques for Left Breast Radiotherapy  

Science Conference Proceedings (OSTI)

The purpose of this study was to analyze the dosimetric difference between intensity-modulated radiation therapy (IMRT) using 3 or 5 beams and multistatic field technique (MSF) in radiotherapy of the left breast. We made comparative analysis of two kinds of radiotherapy that can achieve improved dose homogeneity. First is a MSF that uses both major and small irradiation fields at the same time. The other is IMRT using 3 or 5 beams with an inverse planning system using multiple static multileaf collimators. We made treatment plans for 16 early left breast cancer patients who were randomly selected and had undergone breast conserving surgery and radiotherapy, and analyzed them in the dosimetric aspect. For the mean values of V{sub 95} and dose homogeneity index, no statistically significant difference was observed among the three therapies. Extreme hot spots receiving >110% of prescribed dose were not found in any of the three methods. Using Tukey's test, IMRT showed a significantly larger increase in exposure dose to the ipsilateral lung and the heart than MSF in the low-dose area, but in the high-dose area, MSF showed a slight increase. To improve dose homogeneity, the application of MSF, which can be easily planned and applied more widely, is considered optimal as an alternative to IMRT for radiotherapy of early left breast cancer.

Moon, Seong Kwon [Department of Radiation Oncology, Soonchunhyang University Hospital, Bucheon-Si, Gyeonggi-do (Korea, Republic of); Kim, Yeon Sil [Department of Radiation Oncology, Catholic University of Korea, Seoul St. Mary's Hospital, Seoul (Korea, Republic of); Kim, Soo Young [Department of Preventive Medicine, Eulji University Hospital, Daejeon (Korea, Republic of); Lee, Mi Jo; Keum, Hyun Sup; Kim, Seung Jin; Youn, Seon Min [Department of Radiation Oncology, Eulji University Hospital, Daejeon (Korea, Republic of)

2011-10-01T23:59:59.000Z

45

A TECHNIQUE FOR PRIMARY BEAM CALIBRATION OF DRIFT-SCANNING, WIDE-FIELD ANTENNA ELEMENTS  

SciTech Connect

We present a new technique for calibrating the primary beam of a wide-field, drift-scanning antenna element. Drift-scan observing is not compatible with standard beam calibration routines, and the situation is further complicated by difficult-to-parameterize beam shapes and, at low frequencies, the sparsity of accurate source spectra to use as calibrators. We overcome these challenges by building up an interrelated network of source 'crossing points'-locations where the primary beam is sampled by multiple sources. Using the single assumption that a beam has 180 Degree-Sign rotational symmetry, we can achieve significant beam coverage with only a few tens of sources. The resulting network of crossing points allows us to solve for both a beam model and source flux densities referenced to a single calibrator source, circumventing the need for a large sample of well-characterized calibrators. We illustrate the method with actual and simulated observations from the Precision Array for Probing the Epoch of Reionization.

Pober, Jonathan C.; Parsons, Aaron R. [Astronomy Department, University of California, Berkeley, CA (United States); Jacobs, Daniel C. [School of Earth and Space Exploration, Arizona State University, Tempe, AZ (United States); Aguirre, James E.; Moore, David F. [Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA (United States); Bradley, Richard F.; Parashare, Chaitali R. [Department of Electrical and Computer Engineering, University of Virginia, Charlottesville, VA (United States); Carilli, Chris L. [National Radio Astronomy Observatory, Socorro, NM (United States); Gugliucci, Nicole E. [Department of Astronomy, University of Virginia, Charlottesville, VA (United States)

2012-02-15T23:59:59.000Z

46

Field analytical techniques for mercury in soils technology evaluation. Topical report, November 1994--March 1997  

SciTech Connect

This report presents the evaluation of the four field analytical techniques for mercury detection in soils, namely (1) an anodic stripping voltametry technique (ASV) developed and tested by General Electric Corporation; (2) a static headspace analysis (SHSA) technique developed and tested by Dr. Ralph Turner of Oak Ridge National Laboratory; (3) the BiMelyze{reg_sign} Mercury Immunoassay (Bio) developed and tested by BioNebraska, Inc.; and (4) a transportable x-ray fluorescence (XRF) instrument/technique developed and tested by Spectrace, Inc.

Solc, J.; Harju, J.A.; Grisanti, A.A.

1998-02-01T23:59:59.000Z

47

Retrieving Temperature and Geopotential Fields from a Network of Wind Profiler Observations  

Science Conference Proceedings (OSTI)

In this paper, we extend the 1985 work of Kuo and Anthes to develop a method to derive temperature and geopotential information from a network of wind profiler observations, which we define as a thermodynamic retrieval technique. We first ...

Ying-Hwa Kuo; David O. Gill; Linsheng Cheng

1987-12-01T23:59:59.000Z

48

The Climode Field Campaign: Observing the Cycle of Convection and Restratification over the Gulf Stream  

Science Conference Proceedings (OSTI)

A major oceanographic field experiment is described, which is designed to observe, quantify, and understand the creation and dispersal of weakly stratified fluid known as mode water in the region of the Gulf Stream. Formed in the wintertime by ...

The Climode Group:J. Marshall; R. Ferrari; G. Forget; G. Maze; A. Andersson; N. Bates; W. Dewar; S. Doney; D. Fratantoni; T. Joyce; F. Straneo; J. Toole; R. Weller; J. Edson; M. Gregg; K. Kelly; S. Lozier; J. Palter; R. Lumpkin; R. Samelson; E. Skyllingstad; K. Silverthorne; L. Talley; L. Thomas

2009-09-01T23:59:59.000Z

49

Direct imaging of neural currents using ultra-low field magnetic resonance techniques  

DOE Patents (OSTI)

Using resonant interactions to directly and tomographically image neural activity in the human brain using magnetic resonance imaging (MRI) techniques at ultra-low field (ULF), the present inventors have established an approach that is sensitive to magnetic field distributions local to the spin population in cortex at the Larmor frequency of the measurement field. Because the Larmor frequency can be readily manipulated (through varying B.sub.m), one can also envision using ULF-DNI to image the frequency distribution of the local fields in cortex. Such information, taken together with simultaneous acquisition of MEG and ULF-NMR signals, enables non-invasive exploration of the correlation between local fields induced by neural activity in cortex and more `distant` measures of brain activity such as MEG and EEG.

Volegov, Petr L. (Los Alamos, NM); Matlashov, Andrei N. (Los Alamos, NM); Mosher, John C. (Los Alamos, NM); Espy, Michelle A. (Los Alamos, NM); Kraus, Jr., Robert H. (Los Alamos, NM)

2009-08-11T23:59:59.000Z

50

The magnetic field along the jets of NGC 4258 as deduced from high frequency radio observations  

E-Print Network (OSTI)

We present 2.4" resolution, high sensitivity radio continuum observations of the nearby spiral galaxy NGC 4258 in total intensity and linear polarization obtained with the Very Large Array at 3.6 cm (8.44 GHz). The radio emission along the northern jet and the center of the galaxy is polarized and allows investigation of the magnetic field. Assuming energy-equipartition between the magnetic field and the relativistic particles and distinguishing between (1) a relativistic electron-proton jet and (2) a relativistic electron-positron jet, we obtain average magnetic field strengths of about (1) 310\\muG and (2) 90\\muG. The rotation measure is determined to range from -400 to -800 rad/m^2 in the northern jet. Correcting the observed E-vectors of polarized intensity for Faraday rotation, the magnetic field along the jet turns out to be orientated mainly along the jet axis. An observed tilt with respect to the jet axis may indicate also a toroidal magnetic field component or a slightly helical magnetic field around the northern jet.

M. Krause; A. L"ohr

2004-03-05T23:59:59.000Z

51

OBSERVATION OF A NON-RADIAL PENUMBRA IN A FLUX EMERGING REGION UNDER CHROMOSPHERIC CANOPY FIELDS  

SciTech Connect

The presence of a penumbra is one of the main properties of a mature sunspot, but its formation mechanism has been elusive due to a lack of observations that fully cover the formation process. Utilizing the New Solar Telescope at the Big Bear Solar Observatory, we observed the formation of a partial penumbra for about 7 hr simultaneously at the photospheric (TiO; 7057 A) and the chromospheric (H{alpha} - 1 A) spectral lines with high spatial and temporal resolution. From this uninterrupted, long observing sequence, we found that the formation of the observed penumbra was closely associated with flux emergence under the pre-existing chromospheric canopy fields. Based on this finding, we suggest a possible scenario for penumbra formation in which a penumbra forms when the emerging flux is constrained from continuing to emerge, but rather is trapped at the photospheric level by the overlying chromospheric canopy fields.

Lim, Eun-Kyung; Yurchyshyn, Vasyl; Goode, Philip [Big Bear Solar Observatory, New Jersey Institute of Technology, 40386 North Shore Lane, Big Bear City, CA 92314-9672 (United States); Cho, Kyung-Suk, E-mail: eklim@kasi.re.kr [Korea Astronomy and Space Science Institute 776, Daedeokdae-ro, Yuseong-gu, Daejeon 305-348 (Korea, Republic of)

2013-05-20T23:59:59.000Z

52

Field Observations of the Bering Sea Ice Edge Properties during March 1979  

Science Conference Proceedings (OSTI)

During March 1979 field observations in the Bering Sea show that because of the interaction of winds and ocean swell with the ice, the ice edge divides into three distinct zones. First, adjacent to the open ocean is an edge" zone, 115 km in ...

Jane Bauer; Seelye Martin

1980-12-01T23:59:59.000Z

53

Nonclassical transport processes in geologic media: Review of field and laboratory observations and basic physical concepts  

Science Conference Proceedings (OSTI)

We present an overview of the problem of solute transport in unsaturated heterogeneous media. We first review field and laboratory observations that demonstrate nonclassical flow and transport behavior. The main physical principles causing anomalous transport regimes in fractured rock media are identified. The basic factors and physical concepts needed to describe anomalous transport in saturated and unsaturated fractured rock are discussed in detail.

Bolshov, L.; Kondratenko, P.; Pruess, K.; Semenov, V.

2008-09-01T23:59:59.000Z

54

Direct observation of Oersted-field-induced magnetization dynamics in magnetic nanostripes  

Science Conference Proceedings (OSTI)

We have used time-resolved x-ray photoemission electron microscopy to investigate the magnetization dynamics induced by nanosecond current pulses in NiFe/Cu/Co nanostripes. A large tilt of the NiFe magnetization in the direction transverse to the stripe is observed during the pulses. We show that this effect cannot be quantitatively understood from the amplitude of the Oersted field and the shape anisotropy. High-frequency oscillations observed at the onset of the pulses are attributed to precessional motion of the NiFe magnetization about the effective field. We discuss the possible origins of the large magnetization tilt and the potential implications of the static and dynamic effects of the Oersted field on current-induced domain-wall motion in such stripes.

Uhlir, V. [Institut Neel, Centre national de la recherche scientifique and Universite Joseph Fourier, BP166, F-38042 Grenoble (France); Institute of Physical Engineering, Brno University of Technology, CZ-61669 Brno (Czech Republic); Pizzini, S.; Rougemaille, N.; Ranno, L.; Fruchart, O.; Wagner, E.; Vogel, J. [Institut Neel, Centre national de la recherche scientifique and Universite Joseph Fourier, BP166, F-38042 Grenoble (France); Cros, V. [Unite Mixte de Physique CNRS-Thales, Route departementale 128, F-91767 Palaiseau Cedex (France); Jimenez, E.; Camarero, J. [Departamento Fisica de la Materia Condensada, Instituto ''Nicolas Cabrera'' and Instituto Madrileno de Estudios Avanzados-Nanociencia, Campus Universidad Autonoma de Madrid, E-28049 Madrid (Spain); Urbanek, M. [Institute of Physical Engineering, Brno University of Technology, CZ-61669 Brno (Czech Republic); Gaudin, G. [SPINTEC, UMR8191 CEA/CNRS/UJF/Grenoble INP, INAC, F-38045 Grenoble (France); Tieg, C. [European Synchrotron Radiation Facility, BP200, F-38043 Grenoble (France); Sirotti, F. [Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, F-91192 Gif-sur-Yvette (France)

2011-01-15T23:59:59.000Z

55

EVIDENCE FOR QUASI-ISOTROPIC MAGNETIC FIELDS FROM HINODE QUIET-SUN OBSERVATIONS  

SciTech Connect

Some recent investigations of spectropolarimetric observations of the Zeeman effect in the Fe I lines at 630 nm carried out with the Hinode solar space telescope have concluded that the strength of the magnetic field vector in the internetwork regions of the quiet Sun is in the hG regime and that its inclination is predominantly horizontal. We critically reconsider the analysis of such observations and carry out a complete Bayesian analysis with the aim of extracting as much information as possible from them, including error bars. We apply the recently developed BAYES-ME code that carries out a complete Bayesian inference for Milne-Eddington atmospheres. The sampling of the posterior distribution function is obtained with a Markov Chain Monte Carlo scheme and the marginal distributions are analyzed in detail. The Kullback-Leibler divergence is used to study the extent to which the observations introduce new information in the inference process resulting in sufficiently constrained parameters. Our analysis clearly shows that only upper limits to the magnetic field strength can be inferred, with fields in the kG regime completely discarded. Furthermore, the noise level present in the analyzed Hinode observations induces a substantial loss of information for constraining the azimuth of the magnetic field. Concerning the inclination of the field, we demonstrate that some information is available to constrain it for those pixels with the largest polarimetric signal. The results also point out that the field in pixels with small polarimetric signals can be nicely reproduced in terms of a quasi-isotropic distribution.

Asensio Ramos, A. [Instituto de AstrofIsica de Canarias, 38205, La Laguna, Tenerife (Spain)], E-mail: aasensio@iac.es

2009-08-20T23:59:59.000Z

56

Feasibility of Determining Cloud-Top Heights Using the Backscattered Ultraviolet Satellite Observation Technique  

Science Conference Proceedings (OSTI)

A technique for determining cloud-top height by means of backscattered ultraviolet (BUV) solar radiation is presented. Cloud-top heights can be inferred using this technique if both the BUV radiance and its degree of polarization are measured by ...

Tadashi Aruga; Kaichi Maeda; Donald F. Heath

1984-05-01T23:59:59.000Z

57

Stereoradar Meteorology: A Promising Technique for observation of Precipitation from a Mobile Platform  

Science Conference Proceedings (OSTI)

This paper presents a new concept in the measurement of precipitation by radar. The principle consists of stereoscopic observations: the same precipitation cell is observed by two radars operating at the same attenuated frequency but following ...

J. Testud; P. Amayenc

1989-02-01T23:59:59.000Z

58

OBSERVATIONAL EVIDENCE OF CHANGING PHOTOSPHERIC VECTOR MAGNETIC FIELDS ASSOCIATED WITH SOLAR FLARES  

Science Conference Proceedings (OSTI)

Recent observations have provided evidence that the solar photospheric magnetic fields could have rapid and permanent changes in both longitudinal and transverse components associated with major flares. As a result, the Lorentz force (LF) acting on the solar photosphere and solar interior could be perturbed, and the change of LF is always nearly in the downward direction. However, these rapid and permanent changes have not been systematically investigated, yet, using vector magnetograms. In this paper, we analyze photospheric vector magnetograms covering five flares to study the evolution of photospheric magnetic fields. In particular, we investigate two-dimensional spatial distributions of the changing LF. Around the major flaring polarity inversion line, the net change of the LF is directed downward in an area of {approx}10{sup 19} cm{sup 2} for X-class flares. For all events, the white-light observations show that sunspots darken in this location after flares, and magnetic fields become more inclined, which is consistent with the ideas put forward by Hudson et al. and Fisher et al., and observations.

Su, J. T.; Jing, J.; Wang, H. M. [Space Weather Research Laboratory, New Jersey Institute of Technology, University Heights, Newark, NJ 07102-1982 (United States); Mao, X. J.; Wang, X. F.; Zhang, H. Q.; Deng, Y. Y.; Guo, J.; Wang, G. P., E-mail: sjt@bao.ac.cn [Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 (China)

2011-06-01T23:59:59.000Z

59

An Evaluation of Microphysics Fields from Mesoscale Model Simulations of Tropical Cyclones. Part I: Comparisons with Observations  

Science Conference Proceedings (OSTI)

This study presents a framework for comparing hydrometeor and vertical velocity fields from mesoscale model simulations of tropical cyclones with observations of these fields from a variety of platforms. The framework is based on the Yuter and ...

Robert F. Rogers; Michael L. Black; Shuyi S. Chen; Robert A. Black

2007-06-01T23:59:59.000Z

60

A comparison of predicted and observed turbulent wind fields present in natural and internal wind park environments  

DOE Green Energy (OSTI)

This paper assesses the accuracy of simulated wind fields for both the natural flow and that within a wind park environment. The simulated fields are compared with the observed ones in both the time and frequency domains. Actual measurements of the wind fields and the derived kinematic scaling parameters upwind and downwind of a large San Gorgonio Pass wind park are used. The deviations in the modeled wind field from the observed are discussed. 10 refs., 6 figs., 2 tabs.

Kelly, N D; Wright, A D

1991-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "field techniques observation" 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

Application of the SP technique over Lagadas low enthalpy geothermal field, Greece  

Science Conference Proceedings (OSTI)

This paper reports that in order to verify the applicability of the SP gradient method as a tool for geothermal exploration, Lagadas low enthalpy geothermal field was used as a test site. A total of 63 lines km was surveyed using SP gradient method along 10 profiles covering the main geothermal field area. The complied SP map correlates in a satisfactory was with other geological and geophysical information available. Detected SP anomalies were inverted to causative polarized planes and their relationship with existing deep fractures in the basement is investigated. As a result, two main fracture zones were detected, which were electrically polarized, and coincide with already known similar tectonic features identified by other geological and geophysical methods. Circulation of hot water in deep permeable fracture zones is considered to be the originating mechanism of the observed SP anomalies.

Thanassoulas, C.; Lazou, A. (Inst. of Geology and Mineral Exploration, Dept. of Geophysical Research, 57 Messoghion Avenue, Athens 115-26 (GR))

1990-01-01T23:59:59.000Z

62

Chandra Observations of the High-Magnetic-Field Radio Pulsar J1718-3718  

E-Print Network (OSTI)

High-magnetic field pulsars represent an important class of objects for studying the relationship between magnetars and radio pulsars. Here we report on four Chandra observations of the high-magnetic-field pulsar J1718-3718 ($B=7.4\\times10^{13}$ G) taken in 2009 as well as on a re-analysis of 2002 Chandra observations of the region. We detect pulsations at the pulsar's period in the 2009 data, with pulsed fraction 52%$\\pm$13% in the 0.8--2.0 keV band. We found that the X-ray pulse is aligned with the radio pulse. The data from 2002 and 2009 show consistent spectra and fluxes; a merged overall spectrum is well fit by a blackbody of temperature $186^{+19}_{-18}$\\,eV, slightly higher than predicted by standard cooling models and suggestive of heating via magnetic field decay. However, the best-fit neutron star atmosphere model is consistent with standard cooling. We also report an improved radio position for this pulsar.

Zhu, W W; McLaughlin, M A; Pavlov, G G; Ng, C -Y; Manchester, R N; Gaensler, B M; Woods, P M

2010-01-01T23:59:59.000Z

63

Determining effective soil formation thermal properties from field data using a parameter estimation technique  

DOE Green Energy (OSTI)

A one-dimensional thermal model is derived to describe the temperature field around a vertical borehole heat exchanger (BHEx) for a geothermal heat pump. The inlet and outlet pipe flows are modeled as one, and an effective heat capacity is added to model the heat storage in the fluid and pipes. Parameter estimation techniques are then used to estimate various parameters associated with the model, including the thermal conductivity of the soil and of the grout which fills the borehole and surrounds the u-tube. The model is validated using test data from an experimental rig containing sand with known thermal conductivity. The estimates of the sand thermal conductivity derived from the model are found to be in good agreement with independent measurements.

Shonder, J.A. [Oak Ridge National Lab., TN (United States); Beck, J.V. [Michigan State Univ., East Lansing, MI (United States)

1998-11-01T23:59:59.000Z

64

Alongwind DispersionA Simple Similarity Formula Compared with Observations at 11 Field Sites and in One Wind Tunnel  

Science Conference Proceedings (OSTI)

Observations of alongwind dispersion of clouds were collected from 11 field sites and from one wind tunnel and were used to test simple similarity relations. Because most of the observations consist of concentration time series from fixed ...

Steven R. Hanna; Pasquale Franzese

2000-10-01T23:59:59.000Z

65

CHANDRA OBSERVATIONS OF THE HIGH-MAGNETIC-FIELD RADIO PULSAR J1718-3718  

SciTech Connect

High-magnetic-field pulsars represent an important class of objects for studying the relationship between magnetars and radio pulsars. Here we report on four Chandra observations of the high-magnetic-field pulsar J1718-3718 (B = 7.4 x 10{sup 13} G) taken in 2009 as well as a reanalysis of 2002 Chandra observations of the region. We also report an improved radio position for this pulsar based on ATCA observations. We detect X-ray pulsations at the pulsar's period in the 2009 data, with a pulsed fraction of 52% {+-} 13% in the 0.8-2.0 keV band. We find that the X-ray pulse is aligned with the radio pulse. The data from 2002 and 2009 show consistent spectra and fluxes: a merged overall spectrum is well fit by a blackbody of temperature 186{sup +19}{sub -18} eV, slightly higher than predicted by standard cooling models; however, the best-fit neutron star atmosphere model is consistent with standard cooling. We find the bolometric luminosity L{sup {infinity}}{sub bb} = 4{sup +5}{sub -2} x 10{sup 32} erg s{sup -1} {approx}0.3 E-dot for a distance of 4.5 kpc. We compile measurements of the temperatures of all X-ray-detected high-B pulsars as well as those of low-B radio pulsars and find evidence for the former being hotter on average than the latter.

Zhu, W. W.; Kaspi, V. M.; Ng, C.-Y. [Department of Physics, McGill University, Montreal, QC, H3A 2T8 (Canada); McLaughlin, M. A. [Department of Physics, West Virginia University, Morgantown, WV 26506 (United States); Pavlov, G. G. [Department of Astronomy and Astrophysics, Pennsylvania State University, PA 16802 (United States); Manchester, R. N. [Commonwealth Scientific and Industrial Research Organisation Astronomy and Space Science, Australia Telescope National Facility, Epping, NSW 1710 (Australia); Gaensler, B. M. [Sydney Institute for Astronomy, School of Physics A29, University of Sydney, NSW 2006 (Australia); Woods, P. M., E-mail: zhuww@physics.mcgill.ca, E-mail: vkaspi@physics.mcgill.ca, E-mail: ncy@physics.mcgill.ca, E-mail: pavlov@astro.psu.edu, E-mail: dick.manchester@csiro.au [Corvid Technologies, Huntsville, AL 35806 (United States)

2011-06-10T23:59:59.000Z

66

Mean winds observed with Indian MST radar over tropical mesosphere and comparison with various techniques  

E-Print Network (OSTI)

Abstract. Temporal variation of mean winds between the 65 to 85 km height region from the data collected over the course of approximately four years (199599), using the Indian MST radar located at Gadanki (13.5 ? N, 79.2 ? E), India is presented in this paper. Mesospheric mean winds and their seasonal variation in the horizontal and vertical components are presented in detail. Westward flows during each of the equinoxes and eastward flows during the solstices are observed in the zonal component. The features of the semiannual oscillation (SAO) and the quasi-biennial oscillation (QBO) in the zonal component are noted. In the meridional component, contours reveal a northward motion during the winter and a southward motion during the summer. Large inter-annual variability is found in the vertical component with magnitudes of the order of 2 ms ?1. The MST observed winds are also compared with the winds observed by the MF radar located at Tirunelveli (8.7 ? N, 77.8 ? E), India, the High Resolution Doppler Imager (HRDI) onboard the Upper Atmospheric Research Satellite (UARS), and with the CIRA-86 model. A very good agreement is found between both the ground-based instruments (MST radar and MF radar) in the zonal component and there are few discrepancies in the meridional component. UARS/HRDI observed winds usually have larger magnitudes than the ground-based mean winds. Comparison of the MST derived winds with the CIRA-86 model in the zonal component shows that during the spring equinox and the summer, the winds agree fairly well, but there are a lot of discrepancies in the other seasons and the observed winds with the MST radar are less in magnitude, though the direction is same. The strengths and limitations in estimating reliable mesospheric mean winds using

M. Venkat Ratnam; D. Narayana Rao; T. Narayana Rao; S. Thulasiraman; J. B. Nee; S. Gurubaran; R. Rajaram

2000-01-01T23:59:59.000Z

67

Evaluation of a Decoupling-Based Fault Detection and Diagnostic Technique - Part I: Field Emulation Evaluation  

E-Print Network (OSTI)

Existing methods addressing automated fault detection and diagnosis (FDD) for vapor compression air conditioning system have good performance for faults that occur individually, but they have difficulty in handling multiple-simultaneous faults. The decoupling-based (DB) FDD method explicitly addresses diagnostics for multiple-simultaneous faults for the first time. This paper is the first part of a two-part evaluation of the DB FDD technique whose intent is to validate the DB FDD performance and demonstrate its applications. The first part focuses on sensitivity and robustness evaluation through controlled field emulation testing. Sensitivity tests with artificially introduced faults show that individual faults can be identified before they cause a 5% of degradation in cooling capacity, EER and sensible heat ratio. Robustness tests for forty-one multiple-simultaneous-fault combinations demonstrate that no wrong diagnosis occurs with only two false alarms and two sensitivity losses for a liquid-line restriction. The second part, accompanying the first one, focuses on field applications in California.

Li, H.; Braun, J.

2006-01-01T23:59:59.000Z

68

ARM - Field Campaign - Observations and Modeling of the Green Ocean Amazon:  

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

CHUVA CHUVA Related Campaigns Observations and Modeling of the Green Ocean Amazon (GOAMAZON 2014) 2014.01.01, Martin, AMF Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Observations and Modeling of the Green Ocean Amazon: CHUVA 2013.11.01 - 2014.10.31 Lead Scientist : Luiz Machado Description As one of the Brazilian components of the GOAMAZON field campaign, CHUVA is supported by FAPESP, or Fundação de Amparo a Pesquisa do Estado de São Paulo, (number 2009/15235-8) and coordinated by INPE, or Instituto Nacional de Pesquisas Espaciais. Meaning "rain" in Portuguese, CHUVA is the short name for the "Cloud processes of the main precipitation systems in Brazil: A contribution to cloud resolving modeling and to the GPM (Global

69

TRANSVERSE COMPONENT OF THE MAGNETIC FIELD IN THE SOLAR PHOTOSPHERE OBSERVED BY SUNRISE  

SciTech Connect

We present the first observations of the transverse component of a photospheric magnetic field acquired by the imaging magnetograph SUNRISE/IMaX. Using an automated detection method, we obtain statistical properties of 4536 features with significant linear polarization signal. We obtain a rate of occurrence of 7 x 10{sup -4} s{sup -1} arcsec{sup -2}, which is 1-2 orders of magnitude larger than the values reported by previous studies. We show that these features have no characteristic size or lifetime. They appear preferentially at granule boundaries with most of them being caught in downflow lanes at some point. Only a small percentage are entirely and constantly embedded in upflows (16%) or downflows (8%).

Danilovic, S.; Beeck, B.; Pietarila, A.; Schuessler, M.; Solanki, S. K.; Barthol, P.; Gandorfer, A. [Max-Planck-Institut fuer Sonnensystemforschung, Max-Planck-Str. 2, 37191 Katlenburg-Lindau (Germany); MartInez Pillet, V.; Bonet, J. A. [Instituto de Astrofisica de Canarias, C/Via Lactea s/n, 38200 La Laguna, Tenerife (Spain); Del Toro Iniesta, J. C. [Instituto de Astrofisica de AndalucIa (CSIC), Apartado de Correos 3004, 18080 Granada (Spain); Domingo, V. [Grupo de AstronomIa y Ciencias del Espacio, Universidad de Valencia, 46980 Paterna, Valencia (Spain); Berkefeld, T.; Schmidt, W. [Kiepenheuer-Institut fuer Sonnenphysik, Schoeneckstr. 6, 79104 Freiburg (Germany); Knoelker, M. [High Altitude Observatory, National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307-3000 (United States); Title, A. M., E-mail: danilovic@mps.mpg.d [Lockheed Martin Solar and Astrophysics Laboratory, Bldg. 252, 3251 Hanover Street, Palo Alto, CA 94304 (United States)

2010-11-10T23:59:59.000Z

70

The Measurement of Doppler Wind Fields with Fast Scanning Radars: Signal Processing Techniques  

Science Conference Proceedings (OSTI)

This paper discusses signal processing techniques being developed for making Doppler wind velocity measurements using airport surveillance radars. Techniques are presented and evaluated for velocity estimation using fast-rotating radars. In ...

John R. Anderson

1987-12-01T23:59:59.000Z

71

Holographic Theory of Accelerated Observers, the S-matrix, and the Emergence of Effective Field Theory  

E-Print Network (OSTI)

We present a theory of accelerated observers in the formalism of holographic space time, and show how to define the analog of the Unruh effect for a one parameter set of accelerated observers in a causal diamond in Minkowski space. The key fact is that the formalism splits the degrees of freedom in a large causal diamond into particles and excitations on the horizon. The latter form a large heat bath for the particles, and different Hamiltonians, describing a one parameter family of accelerated trajectories, have different couplings to the bath. We argue that for a large but finite causal diamond the Hamiltonian describing a geodesic observer has a residual coupling to the bath and that the effect of the bath is finite over the long time interval in the diamond. We find general forms of the Hamiltonian, which guarantee that the horizon degrees of freedom will decouple in the limit of large diamonds, leaving over a unitary evolution operator for particles, with an asymptotically conserved energy. That operator converges to the S-matrix in the infinite diamond limit. The S-matrix thus arises from integrating out the horizon degrees of freedom, in a manner reminiscent of, but distinct from, Matrix Theory. We note that this model for the S-matrix implies that Quantum Gravity, as opposed to quantum field theory, has a natural adiabatic switching off of the interactions. We argue that imposing Lorentz invariance on the S-matrix is natural, and guarantees super-Poincare invariance in the HST formalism. Spatial translation invariance is seen to be the residuum of the consistency conditions of HST.

Tom Banks; Willy Fischler

2013-01-24T23:59:59.000Z

72

THERMAL MODEL CALIBRATION FOR MINOR PLANETS OBSERVED WITH WIDE-FIELD INFRARED SURVEY EXPLORER/NEOWISE  

SciTech Connect

With the Wide-field Infrared Survey Explorer (WISE), we have observed over 157,000 minor planets. Included in these are a number of near-Earth objects, main-belt asteroids, and irregular satellites which have well measured physical properties (via radar studies and in situ imaging) such as diameters. We have used these objects to validate models of thermal emission and reflected sunlight using the WISE measurements, as well as the color corrections derived in Wright et al. for the four WISE bandpasses as a function of effective temperature. We have used 50 objects with diameters measured by radar or in situ imaging to characterize the systematic errors implicit in using the WISE data with a faceted spherical near-Earth asteroid thermal model (NEATM) to compute diameters and albedos. By using the previously measured diameters and H magnitudes with a spherical NEATM model, we compute the predicted fluxes (after applying the color corrections given in Wright et al.) in each of the four WISE bands and compare them to the measured magnitudes. We find minimum systematic flux errors of 5%-10%, and hence minimum relative diameter and albedo errors of {approx}10% and {approx}20%, respectively. Additionally, visible albedos for the objects are computed and compared to the albedos at 3.4 {mu}m and 4.6 {mu}m, which contain a combination of reflected sunlight and thermal emission for most minor planets observed by WISE. Finally, we derive a linear relationship between subsolar temperature and effective temperature, which allows the color corrections given in Wright et al. to be used for minor planets by computing only subsolar temperature instead of a faceted thermophysical model. The thermal models derived in this paper are not intended to supplant previous measurements made using radar or spacecraft imaging; rather, we have used them to characterize the errors that should be expected when computing diameters and albedos of minor planets observed by WISE using a spherical NEATM model.

Mainzer, A.; Masiero, J.; Bauer, J.; Ressler, M.; Eisenhardt, P. [Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 (United States); Grav, T. [Department of Physics and Astronomy, Johns Hopkins University, 366 Bloomberg Center, 3400 N. Charles Street, Baltimore, MD 21218 (United States); Wright, E. [UCLA Astronomy, P.O. Box 91547, Los Angeles, CA 90095-1547 (United States); Cutri, R. M. [Infrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125 (United States); McMillan, R. S. [Lunar and Planetary Laboratory, University of Arizona, 1629 East University Blvd., Kuiper Space Science Bldg. 92, Tucson, AZ 85721-0092 (United States); Cohen, M., E-mail: amainzer@jpl.nasa.gov [Radio Astronomy Laboratory, 601 Campbell Hall, University of California, Berkeley, CA 94720 (United States)

2011-08-01T23:59:59.000Z

73

HATS: Field Observations to Obtain Spatially Filtered Turbulence Fields from Crosswind Arrays of Sonic Anemometers in the Atmospheric Surface Layer  

Science Conference Proceedings (OSTI)

The Horizontal Array Turbulence Study (HATS) field program utilized horizontal, crosswind arrays of sonic anemometers to calculate estimates of spatially filtered and subfilter-scale (SFS) turbulence, corresponding to its partitioning in large-...

T. W. Horst; J. Kleissl; D. H. Lenschow; C. Meneveau; C.-H. Moeng; M. B. Parlange; P. P. Sullivan; J. C. Weil

2004-07-01T23:59:59.000Z

74

Global Fields of Soil Moisture and Land Surface Evapotranspiration Derived from Observed Precipitation and Surface Air Temperature  

Science Conference Proceedings (OSTI)

The global fields of normal monthly soil moisture and land surface evapotranspiration are derived with a simple water budget model that has precipitation and potential evapotranspiration as inputs. The precipitation is observed and the potential ...

Y. Mintz; G. K. Walker

1993-08-01T23:59:59.000Z

75

Estimating the Wind Field from Chemical Constituent Observations: Experiments with a One-Dimensional Extended Kalman Filter  

Science Conference Proceedings (OSTI)

Modern data assimilation algorithms such as the four-dimensional variational algorithm or the extended Kalman filter (EKF) can, in theory, estimate the wind field from chemical constituent observations. This seems to be possible because of the ...

Roger Daley

1995-01-01T23:59:59.000Z

76

The Influence of Stratification and Nonlocal Turbulent Production on Estuarine Turbulence: An Assessment of Turbulence Closure with Field Observations  

Science Conference Proceedings (OSTI)

Field observations of turbulent kinetic energy (TKE), dissipation rate ?, and turbulent length scale demonstrate the impact of both density stratification and nonlocal turbulent production on turbulent momentum flux. The data were collected in a ...

Malcolm E. Scully; W. Rocky Geyer; John H. Trowbridge

2011-01-01T23:59:59.000Z

77

Using SAR Remote Sensing, Field Observations, and Models to Better Understand Coastal Flows in the Gulf of Alaska  

Science Conference Proceedings (OSTI)

The steeply rising coastal terrain of southeast Alaska can produce a wide variety of terrain-induced flows such as barrier jets, gap flows, and downslope wind storms. This study uses a combination of satellite remote sensing, field observations, ...

Nathaniel S. Winstead; Brian Colle; Nicholas Bond; George Young; Joseph Olson; Kenneth Loescher; Frank Monaldo; Donald Thompson; William Pichel

2006-06-01T23:59:59.000Z

78

General Matrix Inversion Technique for the Calibration of Electric Field Sensor Arrays on Aircraft Platforms  

Science Conference Proceedings (OSTI)

A matrix calibration procedure has been developed that uniquely relates the electric fields measured at the aircraft with the external vector electric field and net aircraft charge. The calibration method can be generalized to any reasonable ...

D. M. Mach; W. J. Koshak

2007-09-01T23:59:59.000Z

79

Geothermal Prospecting using Hyperspectral Imaging and Field Observations, Dixie Meadows, NV  

DOE Green Energy (OSTI)

In an ongoing project to relate surface hydrothermal alteration to structurally controlled geothermal aquifers, we mapped a 16 km swath of the eastern front of the Stillwater Range using Hyperspectral fault and mineral mapping techniques. The Dixie Valley Fault system produces a large fractured aquifer heating Pleistocene aged groundwater to a temperature of 285 C at 5-6 km. Periodically over the last several thousand years, seismic events have pushed these heated fluids to the surface, leaving a rich history of hydrothermal alteration in the Stillwater Mountains. At Dixie Hot Springs, the potentiometric surface of the aquifer intersects the surface, and 75 C waters flow into the valley. We find a high concentration of alunite, kaolinite, and dickite on the exposed fault surface directly adjacent to a series of active fumaroles on the range front fault. This assemblage of minerals implies interaction with water in excess of 200 C. Field spectra support the location of the high temperature mineralization. Fault mapping using a Digital Elevation Model in combination with mineral lineation and field studies shows that complex fault interactions in this region are improving permeability in the region leading to unconfined fluid flow to the surface. Seismic studies conducted 10 km to the south of Dixie Meadows show that the range front fault dips 25-30 to the southeast (Abbott et al., 2001). At Dixie Meadows, the fault dips 35 to the southeast, demonstrating that this region is part of the low angle normal fault system that produced the Dixie Valley Earthquake in 1954 (M=6.8). We conclude that this unusually low angle faulting may have been accommodated by the presence of heated fluids, increasing pore pressure within the fault zone. We also find that younger synthetic faulting is occurring at more typical high angles. In an effort to present these findings visually, we created a cross-section, illustrating our interpretation of the subsurface structure and the hypothesized locations of increased permeability. The success of these methods at Dixie Meadows will greatly improve our understanding of other Basin and Range geothermal systems.

Kennedy-Bowdoin, T; Silver, E; Martini, B; Pickles, W

2004-04-26T23:59:59.000Z

80

A Diabatic Lagrangian Technique for the Analysis of Convective Storms. Part I: Description and validation via an observing system simulation experiment  

Science Conference Proceedings (OSTI)

A diabatic Lagrangian analysis (DLA) technique for deriving potential temperature, water vapor and cloud water mixing ratios, and virtual buoyancy from three-dimensional, time-dependent Doppler radar wind and reflectivity fields in storms is ...

Conrad L. Ziegler

Note: This page contains sample records for the topic "field techniques observation" 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

Calculation methods and detection techniques for electric and magnetic fields from power lines with measurement verification  

E-Print Network (OSTI)

An accurate determination and characterization of electric and magnetic fields produced by power lines is a complex task. Different models must be used for far fields and for near fields. This study is centered on computation and measurement aspects of extremely low frequency magnetic fields in the direct proximity of the conductors of power lines, situated well above the ground level. Conventional approximation of a sagged wire as a straight horizontal conductor of infinite length has been substituted with a periodical catenary model of the conductors A series of measurements performed with all electric utility bucket truck provide unique magnetic field data very close to the conductors. A conceptual design of a power line proximity detector is proposed as a result of these studies.

Mamishev, Alexander V

1994-01-01T23:59:59.000Z

82

Obtaining oblique technique source-to-skin distances for irregular field (Clarkson) calculations: The Mayo Off-axis Distance Indicator  

Science Conference Proceedings (OSTI)

Significant dose inhomogeneities may exist between the supraclavicular fossa (SCF) and the internal mammary chain (IMC) regions in the irregular L-shaped (hockey stick) field associated with breast cancer treatments. This dose inhomogeneity exists, in part, because of a positive air gap in the SCF and a negative air gap in the IMC locations. Independent of treatment technique, (i.e., whether anterior-posterior (AP) or oblique fields are used), accurate source-to-skin distance (SSD) values for the SCF, IMC, and axilla are necessary when doing an irregular field (Clarkson) dose calculation. However, when an oblique technique is used to treat the hockey stick field, obtaining non-central-axis SSDs is not as straightforward as when an AP technique is employed. The Mayo Off-axis Distance Indicator was constructed to slide into the blocking tray slot of the simulator or treatment machine. This mechanical measuring device provides quick and accurate SSD measurements for non-central-axis points under either AP or, more importantly, oblique treatment conditions.

Lajoie, W.N. (Mayo Medical Center, Rochester, MN (USA))

1988-09-01T23:59:59.000Z

83

High-Resolution Stratospheric Tracer Fields Reconstructed with Lagrangian Techniques: A Comparative Analysis of Predictive Skill  

Science Conference Proceedings (OSTI)

Numerical experiments and statistical analyses are conducted to determine the skill of different Lagrangian techniques for the construction of tracer distributions. High-resolution potential vorticity (PV) maps are calculated from simulations of ...

R. Dragani; G. Redaelli; G. Visconti; A. Mariotti; V. Rudakov; A. R. MacKenzie; L. Stefanutti

2002-06-01T23:59:59.000Z

84

An h-Adaptive Finite-Element Technique for Constructing 3D Wind Fields  

Science Conference Proceedings (OSTI)

An h-adaptive, mass-consistent finite-element model (FEM) has been developed for constructing 3D wind fields over irregular terrain utilizing sparse meteorological tower data. The element size in the computational domain is dynamically controlled ...

Darrell W. Pepper; Xiuling Wang

2009-03-01T23:59:59.000Z

85

A Technique for Analyzing Optimal Relationships among Multiple Sets of Data Fields. Part 1: The Method  

Science Conference Proceedings (OSTI)

A multiple-set canonical correlation analysis (MCCA), which can be used to study atmospheric motions by analyzing the relationships among more than two sets of data fields, is proposed. By using the product or squared product of correlation ...

Jeng-Ming Chen; C-P. Chang; Patrick A. Harr

1994-11-01T23:59:59.000Z

86

New observations of infiltration through fractured alluvium in Yucca Flat, Nevada Test Site: A preliminary field investigation  

Science Conference Proceedings (OSTI)

Regional tectonics coupled with the subsurface detonation of nuclear explosives has caused widespread fracturing of the alluvium of Yucca Flat. Fractures deeper than 30 meters have been observed in boreholes. Some of these fractures are large enough to capture significant amounts of runoff during storm events. Evidence of stream capture by fractures and observations of runoff flowing into open fractures give qualitative evidence of infiltration to depths greater than several meters and possibly to the saturated zone. Our field observations contradict the assumption that little infiltration occurs on Yucca Flat. The larger, hydrologically important fractures are associated with geologic faults or the regional stress field. Additional field studies are needed to investigate the impact of fractures on the transport of contaminants.

Kao, C.S. [California Univ., Berkeley, CA (United States). Dept. of Civil Engineering; Smith, D.K. [Lawrence Livermore National Lab., CA (United States); McKinnis, W.B. [Lawrence Livermore National Lab., Mercury, NV (United States)

1994-02-01T23:59:59.000Z

87

Multimodal Properties of the Surface-Wave Field Observed with Pitch-Roll Buoys During GATE  

Science Conference Proceedings (OSTI)

A sophisticated analysis technique is applied to a subset of pitch-roll buoy data collected by the research vessels Gilliss and Quadra during the GARP Tropical Atlantic Experiment (GATE) in September 1974. The procedure enables the examination of ...

Linda Marie Lawson; Robert Bryan Long

1983-03-01T23:59:59.000Z

88

Revised equipartition & minimum energy formula for magnetic field strength estimates from radio synchrotron observations  

E-Print Network (OSTI)

The commonly used classical equipartition or minimum-energy estimate of total magnetic fields strengths from radio synchrotron intensities is of limited practical use because it is based on the hardly known ratio K of the total energies of cosmic ray protons and electrons and also has inherent problems. We present a revised formula, using the number density ratio K for which we give estimates. For particle acceleration in strong shocks K is about 40 and increases with decreasing shock strength. Our revised estimate for the field strength gives larger values than the classical estimate for flat radio spectra with spectral indices of about 0.5-0.6, but smaller values for steep spectra and total fields stronger than about 10 muG. In very young supernova remnants, for example, the classical estimate may be too large by up to 10x. On the other hand, if energy losses of cosmic ray electrons are important, K increases with particle energy and the equipartition field may be underestimated significantly. Our revised larger equipartition estimates in galaxy clusters and radio lobes are consistent with independent estimates from Faraday rotation measures, while estimates from the ratio between radio synchrotron and X-ray inverse Compton intensities generally give much weaker fields. This may be explained e.g. by a concentration of the field in filaments. Our revised field strengths may also lead to major revisions of electron lifetimes in jets and radio lobes estimated from the synchrotron break frequency in the radio spectrum.

Rainer Beck; Marita Krause

2005-07-15T23:59:59.000Z

89

Advancing weatherization performance: Measured results from the North Carolina field test of an advanced measure selection technique  

SciTech Connect

The field performance of weatherizations based on a newly-developed advanced residential energy conservation measure selection technique was tested alongside current Retro-Tech-based weatherizations in North Carolina. The two weatherization approaches were compared based on implementation ease, measures installed, labor and cost requirements, and energy savings achieved. One-hundred twenty low-income, single-family households served by three different weatherization agencies participated in the field test which was conducted between June 1989 and August 1991. Average heating energy savings were 33% for weatherizations based on the new technique and 23% for Retro-Tech-based weatherizations. Weatherizations based on the new technique achieved 43% more heating energy savings, cost around 10% less at two weatherization agencies and considerably more at the third, and were near equivalent in labor requirements. Major findings from the study include: (1) the advanced audit will install some measures in near identical quantities as Retro-Tech-based weatherizations and others in dramatically different quantities, (2) the advanced audit can significantly increase heating energy savings, (3) blower-door-directed air sealing can more than double the air leakage reductions achieved from standard air sealing techniques, (4) North Carolina low-income houses have much higher average leakage rates than similar New York houses but can be sealed as well or better, and (5) using the advanced audit will not increase weatherization costs and may actually lower costs for most weatherization agencies.

Sharp, T.R.

1993-07-01T23:59:59.000Z

90

Numerical Simulations and Observations of Surface Wave Fields under an Extreme Tropical Cyclone  

Science Conference Proceedings (OSTI)

The performance of the wave model WAVEWATCH III under a very strong, category 5, tropical cyclone wind forcing is investigated with different drag coefficient parameterizations and ocean current inputs. The model results are compared with field ...

Yalin Fan; Isaac Ginis; Tetsu Hara; C. Wayne Wright; Edward J. Walsh

2009-09-01T23:59:59.000Z

91

Observed Enhancement of Reflectivity and the Electric Field in Long-Lived Florida Anvils  

Science Conference Proceedings (OSTI)

A study of two long-lived Florida anvils showed that reflectivity >20 dBZ increased in area, thickness, and sometimes magnitude at the midlevel well downstream of the convective cores. In these same regions electric fields maintained strengths >...

James E. Dye; John C. Willett

2007-10-01T23:59:59.000Z

92

Comparisons of GCM and Observed Surface Wind Fields over the Tropical Indian and Pacific Oceans  

Science Conference Proceedings (OSTI)

Many of the processes that have important effects on both the climatological distribution and interannual variability of sea surface temperatures (SSTs) in the tropical oceans are greatly affected by the surface wind field. For this reason ...

Nicholas E. Graham; Tim P. Barnett; Robert M. Chervin; Michael E. Schlesinger; Ulrich Schlese

1989-03-01T23:59:59.000Z

93

Effects of the Choice of Meteorological Data on a Radiation Model Simulation of the NOAA Technique for Estimating Outgoing Longwave Radiation from Satellite Radiance Observations  

Science Conference Proceedings (OSTI)

The technique used by NOAA to estimate the outgoing longwave flux from 10 ?m window radiance observations has been reexamined because the data that result from the application of the empirically determined regression equation are systematically ...

Robert G. Ellingson; David J. Yanuk; Arnold Gruber

1989-08-01T23:59:59.000Z

94

First-Order Structure Function Analysis of Statistical Scale Invariance in the AIRS-Observed Water Vapor Field  

Science Conference Proceedings (OSTI)

The power-law scale dependence, or scaling, of first-order structure functions of the tropospheric water vapor field between 58S and 58N is investigated using observations from the Atmospheric Infrared Sounder (AIRS). Power-law scale dependence ...

Kyle G. Pressel; William D. Collins

2012-08-01T23:59:59.000Z

95

Green Bank Telescope observations of the water masers of NGC 3079: accretion disk magnetic field and maser scintillation  

E-Print Network (OSTI)

We present observations of the 22 GHz water megamasers in the circumnuclear disk of NGC 3079 obtained with the Green Bank Telescope. The data are analyzed for circular polarization due to the Zeeman-induced splitting of the water maser lines. No circular polarization is detected and we derive a 1 sigma upper limit of 11 mG for the toroidal magnetic field at ~0.64 pc from the central black hole. This is the tightest upper limit for the magnetic field around a black hole to date. We use the magnetic field limit to derive an estimate of the mass accretion onto the central black hole. In addition to the polarimetric results, we present an observation of rapid variability in the maser lines, which we explain as weak interstellar scintillation. From the scintillation parameters, we estimate an intrinsic size of the mostly saturated maser features of ~12 microarcseconds. This is consistent with models assuming a thick, clumpy accretion disk.

W. H. T. Vlemmings; H. E. Bignall; P. J. Diamond

2006-10-30T23:59:59.000Z

96

The design and field observation of a haptic notification system for timing awareness during oral presentations  

Science Conference Proceedings (OSTI)

To moderate oral presentations a chair must manage time, and communicate time parameters to speakers through a variety of means. But speakers often miss time cues, chairs cannot confirm their receipt, and the broken dialogue can be a sideshow for the ... Keywords: field study, oral presentation, vibrotactile, wearable haptics

Diane Tam; Karon E. MacLean; Joanna McGrenere; Katherine J. Kuchenbecker

2013-04-01T23:59:59.000Z

97

Simulated and Observed Influence of the Nocturnal Urban Heat Island on the Local Wind Field  

Science Conference Proceedings (OSTI)

A three-dimensional primative equation model was used to simulate the low-level wind field, given the urban heat island as the lower temperature boundary condition. The specification of the average heat island bypassed the need to calculate the ...

Roland R. Draxler

1986-08-01T23:59:59.000Z

98

Surface Meteorological Observations in Severe Thunderstorms. Part II: Field Experiments with TOTO  

Science Conference Proceedings (OSTI)

The TOTO (Totable Tornado Observatory) device was field tested in the Southern Plains by a severe-storm intercept team from the University of Oklahoma from late May through early June 1981. The results from two intercept missions and a gust-front ...

Howard B. Bluestein

1983-05-01T23:59:59.000Z

99

Accuracy of Wind Fields Observed by a Bistatic Doppler Radar Network  

Science Conference Proceedings (OSTI)

The accuracy of wind vectors derived from bistatic dual-Doppler synthesis was investigated. The investigation was based on mathematical examinations and observation data analyses in both convective and stratiform cases. Accurate wind vectors were ...

Shinsuke Satoh; Joshua Wurman

2003-08-01T23:59:59.000Z

100

ARM - Field Campaign - Observations and Modeling of the Green Ocean Amazon  

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

govCampaignsObservations and Modeling of the Green Ocean Amazon Aerial govCampaignsObservations and Modeling of the Green Ocean Amazon Aerial Campaign Campaign Links GOAMAZON Website Related Campaigns Observations and Modeling of the Green Ocean Amazon (GOAMAZON 2014) 2014.01.01, Martin, AMF Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Observations and Modeling of the Green Ocean Amazon Aerial Campaign 2014.02.15 - 2014.10.15 Lead Scientist : Scot Martin Description The hydrologic cycle of the Amazon Basin is one of the primary heat engines of the Southern Hemisphere. Any accurate climate model must succeed in a good description of the Basin, both in its natural state and in states perturbed by regional and global human activities. At the present time, however, tropical deep convection in a natural state is poorly understood

Note: This page contains sample records for the topic "field techniques observation" 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

ARM - Field Campaign - Observations and Modeling of the Green Ocean Amazon:  

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

govCampaignsObservations and Modeling of the Green Ocean Amazon: SKIP govCampaignsObservations and Modeling of the Green Ocean Amazon: SKIP Pre-campaign Measurements Related Campaigns Observations and Modeling of the Green Ocean Amazon (GOAMAZON 2014) 2014.01.01, Martin, AMF Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Observations and Modeling of the Green Ocean Amazon: SKIP Pre-campaign Measurements 2013.03.15 - 2015.12.31 Lead Scientist : Heath Powers For data sets, see below. Description The Self-Kontained Instrument Platform (SKIP) container is being deployed at the T3 GOAmazon site containing a basic set of meteorological and radiometric instrumentation including: SMET, SKYRAD, GRNRAD, and ceilometer (all ARM instruments), an ozone monitor, and a nitric Oxide/nitrogen

102

ARM - Field Campaign - Observations and Modeling of the Green Ocean Amazon:  

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

govCampaignsObservations and Modeling of the Green Ocean Amazon: CCN govCampaignsObservations and Modeling of the Green Ocean Amazon: CCN Activity of Aerosols Related Campaigns Observations and Modeling of the Green Ocean Amazon (GOAMAZON 2014) 2014.01.01, Martin, AMF Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Observations and Modeling of the Green Ocean Amazon: CCN Activity of Aerosols 2014.01.01 - 2014.12.31 Lead Scientist : Jian Wang Description Aerosol indirect effects, which represent the impact of aerosols on climate through influencing the properties of clouds, remain one of the main uncertainties in climate predictions (IPCC, 2007). Reducing this large uncertainty requires both improved understanding and representation of aerosol properties and processes in climate models, including the cloud

103

Airflow and Precipitation Fields within Deep Alpine Valleys Observed by Airborne Doppler Radar  

Science Conference Proceedings (OSTI)

Although airborne Doppler radar is increasingly relied upon to provide detailed descriptions of mesoscale precipitation systems in remote and complex meteorological settings, the utility of these observations has often been limited by the ...

Olivier Bousquet; Bradley F. Smull

2003-10-01T23:59:59.000Z

104

Ground-Based and Satellite Observations of Cloud Fields in the Netherlands  

Science Conference Proceedings (OSTI)

A study is performed on the combination of ground-based and satellite observations for the derivation of cloud properties. Ground-based measurements from a lidar ceilometer and an infrared radiometer were combined with measurements of the NOAA ...

Arnout Feut; Andr van Lammeren

1996-09-01T23:59:59.000Z

105

Evaluation of a Decoupling-Based Fault Detection and Diagnostic Technique - Part II: Field Evaluation and Application  

E-Print Network (OSTI)

Existing methods addressing automated fault detection and diagnosis (FDD) for vapor compression air conditioning system have good performance for faults that occur individually, but they have difficulty in handling multiple-simultaneous faults. The decoupling-based (DB) FDD method explicitly addresses diagnostics for multiple-simultaneous faults for the first time. This paper is the second part of a two-part evaluation of the decoupling-based (DB) fault detection and diagnosis (FDD) technique whose intent is to validate the DB FDD performance and demonstrate its applications. The first part focuses on sensitivity and robustness evaluation through controlled field emulation testing. In this paper, the technique is applied to a number of field sites in California. Detailed results are given for a single site and summary results are given for the other sites. In sum, about 70% of the investigated systems are impacted by faults and about 40% have more than one fault. Service is justified for about 40% of the units. Most of the diagnosed faults are verified through field visits.

Li, H.; Braun, J.

2006-01-01T23:59:59.000Z

106

Fielding the magnetically applied pressure-shear technique on the Z accelerator (completion report for MRT 4519).  

SciTech Connect

The recently developed Magnetically Applied Pressure-Shear (MAPS) experimental technique to measure material shear strength at high pressures on magneto-hydrodynamic (MHD) drive pulsed power platforms was fielded on August 16, 2013 on shot Z2544 utilizing hardware set A0283A. Several technical and engineering challenges were overcome in the process leading to the attempt to measure the dynamic strength of NNSA Ta at 50 GPa. The MAPS technique relies on the ability to apply an external magnetic field properly aligned and time correlated with the MHD pulse. The load design had to be modified to accommodate the external field coils and additional support was required to manage stresses from the pulsed magnets. Further, this represents the first time transverse velocity interferometry has been applied to diagnose a shot at Z. All subsystems performed well with only minor issues related to the new feed design which can be easily addressed by modifying the current pulse shape. Despite the success of each new component, the experiment failed to measure strength in the samples due to spallation failure, most likely in the diamond anvils. To address this issue, hydrocode simulations are being used to evaluate a modified design using LiF windows to minimize tension in the diamond and prevent spall. Another option to eliminate the diamond material from the experiment is also being investigated.

Alexander, C. Scott; Haill, Thomas A.; Dalton, Devon Gardner; Rovang, Dean Curtis; Lamppa, Derek C.

2013-09-01T23:59:59.000Z

107

ARM - Field Campaign - Observations and Modeling of the Green Ocean Amazon:  

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

Sounding Enhancement Sounding Enhancement Related Campaigns Observations and Modeling of the Green Ocean Amazon (GOAMAZON 2014) 2014.01.01, Martin, AMF Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Observations and Modeling of the Green Ocean Amazon: Sounding Enhancement 2014.02.01 - 2014.10.31 Lead Scientist : Courtney Schumacher Description The scientific focus of this campaign is to provide higher temporal sampling of the vertical structure of the atmosphere during the two intensive observing periods (IOPs) of GOAmazon2014. The AMF1 is currently funded to launch 4 sondes/day for all of 2014 (i.e., 2 am, 8 am, 2 pm, and 8 pm LT), however, rapid changes in boundary layer and free tropospheric temperature, humidity, and wind profiles happen throughout the diurnal

108

ARM - Field Campaign - Observations and Modeling of the Green Ocean Amazon:  

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

Thermal Desorption Ionization Mass Spectrometer (TDCIMS) Thermal Desorption Ionization Mass Spectrometer (TDCIMS) Related Campaigns Observations and Modeling of the Green Ocean Amazon (GOAMAZON 2014) 2014.01.01, Martin, AMF Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Observations and Modeling of the Green Ocean Amazon: Thermal Desorption Ionization Mass Spectrometer (TDCIMS) 2014.01.01 - 2014.10.31 Lead Scientist : Jim Smith Description As part of both GoAmazon2014 IOPs, the Thermal Desorption Chemical Ionization Mass Spectrometer (TDCIMS) will perform measurements of the molecular composition of 10-50 nm diameter particles. TDCIMS observations will be used to address two objectives the GoAmazon. For studying the interactions between anthropogenic and biogenic emissions, the TDCIMS will

109

ARM - Field Campaign - Observations and Modeling of the Green Ocean Amazon:  

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

Size Size Resolved CCN Measurements Related Campaigns Observations and Modeling of the Green Ocean Amazon (GOAMAZON 2014) 2014.01.01, Martin, AMF Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Observations and Modeling of the Green Ocean Amazon: Size Resolved CCN Measurements 2014.01.01 - 2014.12.31 Lead Scientist : Jian Wang Description Aerosol indirect effects, which represent the impact of aerosols on climate through influencing the properties of clouds, remain one of the main uncertainties in climate predictions (IPCC, 2007). Reducing this large uncertainty requires both improved understanding and representation of aerosol properties and processes in climate models, including the cloud activation properties of aerosols. The Atmospheric System Research (ASR)

110

ARM - Field Campaign - Observations and Modeling of the Green Ocean Amazon:  

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

Aerosol Mass Spectrometry Related Campaigns Observations and Modeling of the Green Ocean Amazon (GOAMAZON 2014) 2014.01.01, Martin, AMF Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Observations and Modeling of the Green Ocean Amazon: Aerosol Mass Spectrometry 2014.01.15 - 2014.12.31 Lead Scientist : Lizabeth Alexander Description The first objective of the proposed project is to understand and quantify the interactions of biogenic and anthropogenic emissions with respect to the production of secondary organic aerosol (SOA). In clean conditions in the Amazon basin, SOA dominates the diameter distribution of the submicron particles. How and why is the diameter distribution shifted by pollution? The second objective follows from the first in that, although the diameter

111

ARM - Field Campaign - Observations and Modeling of the Green Ocean Amazon:  

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

Semi-Volatile Thermal desorption Aerosol Gas chromatograph (SVTAG) Semi-Volatile Thermal desorption Aerosol Gas chromatograph (SVTAG) Related Campaigns Observations and Modeling of the Green Ocean Amazon (GOAMAZON 2014) 2014.01.01, Martin, AMF Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Observations and Modeling of the Green Ocean Amazon: Semi-Volatile Thermal desorption Aerosol Gas chromatograph (SVTAG) 2014.02.01 - 2014.10.15 Lead Scientist : Allen Goldstein Description In areas where biogenic emissions are oxidized in the presence of anthropogenic pollutants such as SO2, NOx and black carbon, it has become increasingly apparent that secondary organic aerosol (SOA) formation from biogenic volatile organic compounds (VOCs) is substantially enhanced. Research is urgently needed to elucidate fundamental processes of natural

112

ARM - Field Campaign - Observations and Modeling of the Green Ocean Amazon:  

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

Neutral cluster Air Ion Spectrometer (NAIS) Related Campaigns Observations and Modeling of the Green Ocean Amazon (GOAMAZON 2014) 2014.01.01, Martin, AMF Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Observations and Modeling of the Green Ocean Amazon: Neutral cluster Air Ion Spectrometer (NAIS) 2014.01.01 - 2014.10.31 Lead Scientist : John Backman Description The goal of the Neutral cluster and Air Ion Spectrometer measure and mechanistically understand the factors affecting the particle number size distribution of the atmospheric particle population over a tropical rain forest (especially the effects of anthropogenic pollution as a perturbation to natural state). The instrument will complement particle number size

113

ARM - Field Campaign - Observations and Modeling of the Green Ocean Amazon:  

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

SRI-PTR-ToFMS SRI-PTR-ToFMS Related Campaigns Observations and Modeling of the Green Ocean Amazon (GOAMAZON 2014) 2014.01.01, Martin, AMF Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Observations and Modeling of the Green Ocean Amazon: SRI-PTR-ToFMS 2014.01.01 - 2014.10.31 Lead Scientist : Alex Guenther Description One of the major uncertainties in climate model simulations is the effects of aerosols on radiative forcing and a better understanding of the factors controlling aerosol distributions and life cycle is urgently needed. Aerosols contribute directly to the Earth's radiation balance by scattering or absorbing light as a function of their physical properties and indirectly through particle-cloud interactions that lead to cloud

114

ARM - Field Campaign - Observations and Modeling of the Green Ocean Amazon:  

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

TEM of TEM of Aerosol Particles Related Campaigns Observations and Modeling of the Green Ocean Amazon (GOAMAZON 2014) 2014.01.01, Martin, AMF Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Observations and Modeling of the Green Ocean Amazon: TEM of Aerosol Particles 2014.02.01 - 2014.10.14 Lead Scientist : Peter Buseck Description Atmospheric samples collected from the Amazon Basin, a major source of natural continental aerosols impacted seasonally by biomass burning and urban emissions, are important indicators of atmospheric reactions and their effects on climate and health. We will use transmission electron microscopy (TEM) to determine the spatially resolved compositions, sizes, morphologies, mixing states (aggregated, coated, embedded), and reactions

115

ARM - Field Campaign - Observations and Modeling of the Green Ocean Amazon:  

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

NPSD NPSD Related Campaigns Observations and Modeling of the Green Ocean Amazon (GOAMAZON 2014) 2014.01.01, Martin, AMF Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Observations and Modeling of the Green Ocean Amazon: NPSD 2014.02.01 - 2014.10.17 Lead Scientist : Jian Wang Description Participation during GOAMAZON 2014 is in support of studies of the Aerosol Life Cycle, in particular the measurement of new particle formation and initial growth. Measurement will be accomplished through deployment at the T3 measurement site of an aerosol size spectrometer (NPSD) acquiring data on a 5-minute time interval, developed and optimized for the detection of aerosol down to below 1 nm in diameter. Particle detection is achieved through the use of a condensation particle

116

ARM - Field Campaign - Observations and Modeling of the Green Ocean Amazon:  

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

Year-to-Year Differences (GOAMAZON 2015) Year-to-Year Differences (GOAMAZON 2015) Related Campaigns Observations and Modeling of the Green Ocean Amazon (GOAMAZON 2014) 2014.01.01, Martin, AMF Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Observations and Modeling of the Green Ocean Amazon: Year-to-Year Differences (GOAMAZON 2015) 2015.01.01 - 2015.12.31 Lead Scientist : Scot Martin Description The strong hydrologic cycle of the Amazon Basin is one of the primary heat engines of the Southern Hemisphere. Any accurate climate model must succeed in a good description of the Basin, both in its natural state and in states perturbed by regional and global human activities. At the present time, however, tropical deep convection in a natural state is poorly understood

117

ARM - Field Campaign - Observations and Modeling of the Green Ocean Amazon:  

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

Proton-Transfer-Reaction Time-of-Flight (PTR-TOF) Proton-Transfer-Reaction Time-of-Flight (PTR-TOF) Related Campaigns Observations and Modeling of the Green Ocean Amazon (GOAMAZON 2014) 2014.01.01, Martin, AMF Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Observations and Modeling of the Green Ocean Amazon: Proton-Transfer-Reaction Time-of-Flight (PTR-TOF) 2014.02.01 - 2014.10.15 Lead Scientist : Scot Martin Description The hydrologic cycle of the Amazon Basin is one of the primary heat engines of the Southern Hemisphere. Any accurate climate model must succeed in a good description of the Basin, both in its natural state and in states perturbed by regional and global human activities. At the present time, however, tropical deep convection in a natural state is poorly understood

118

ARM - Field Campaign - Observations and Modeling of the Green Ocean Amazon:  

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

Laser Laser Luminescence Related Campaigns Observations and Modeling of the Green Ocean Amazon (GOAMAZON 2014) 2014.01.01, Martin, AMF Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Observations and Modeling of the Green Ocean Amazon: Laser Luminescence 2014.01.01 - 2014.12.31 Lead Scientist : Frank Keutsch Description The formation of secondary organic aerosol (SOA) and ozone (O3), two secondary pollutants that impact human health, the biosphere, and climate, is directly coupled to the oxidation of volatile organic compounds (VOCs). The primary objective of the proposed work is to utilize a suite of measurements, especially of glyoxal and formaldehyde to be obtained by Keutsch group instrumentation based on laser-induced luminescence

119

SEM technique for imaging and measuring electronic transport in nanocomposites based on electric field induced contrast  

DOE Patents (OSTI)

Methods and apparatus are described for SEM imaging and measuring electronic transport in nanocomposites based on electric field induced contrast. A method includes mounting a sample onto a sample holder, the sample including a sample material; wire bonding leads from the sample holder onto the sample; placing the sample holder in a vacuum chamber of a scanning electron microscope; connecting leads from the sample holder to a power source located outside the vacuum chamber; controlling secondary electron emission from the sample by applying a predetermined voltage to the sample through the leads; and generating an image of the secondary electron emission from the sample. An apparatus includes a sample holder for a scanning electron microscope having an electrical interconnect and leads on top of the sample holder electrically connected to the electrical interconnect; a power source and a controller connected to the electrical interconnect for applying voltage to the sample holder to control the secondary electron emission from a sample mounted on the sample holder; and a computer coupled to a secondary electron detector to generate images of the secondary electron emission from the sample.

Jesse, Stephen (Knoxville, TN); Geohegan, David B. (Knoxville, TN); Guillorn, Michael (Brooktondale, NY)

2009-02-17T23:59:59.000Z

120

Observing Structure and Motion in Molecules with Ultrafast Strong Field and Short Wavelength Laser Radiation  

SciTech Connect

The term "molecular movie" has come to describe efforts to track and record Angstrom-scale coherent atomic and electronic motion in a molecule. The relevant time scales for this range cover several orders of magnitude, from sub-femtosecond motion associated with electron-electron correlations, to 100-fs internal vibrations, to multi-picosecond motion associated with the dispersion and quantum revivals of molecular reorientation. Conventional methods of cinematography do not work well in this ultrafast and ultrasmall regime, but stroboscopic "pump and probe" techniques can reveal this motion with high fidelity. This talk will describe some of the methods and recent progress in exciting and controlling this motion, using both laboratory lasers and the SLAC Linac Coherent Light Source x-ray free electron laser, and will further try to relate the date to the goal of molecular movies.

Bucksbaum, Philip H

2011-04-13T23:59:59.000Z

Note: This page contains sample records for the topic "field techniques observation" from the National Library of EnergyBeta (NLEBeta).
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to obtain the most current and comprehensive results.


121

THE BHB STARS IN THE SURVEY FIELDS OF RODGERS ET AL. (1993): NEW OBSERVATIONS AND COMPARISONS WITH OTHER RECENT SURVEYS  

Science Conference Proceedings (OSTI)

We study blue horizontal branch (BHB) and RR Lyrae stars in the Rodgers et al. fields and compare their velocity and density distributions with other surveys in the same part of the sky. Photometric data are given for 176 early-type stars in the northern field. We identify fourteen BHB stars and four possible BHB stars, and determine the selection efficiency of the Century survey, the HK survey, and the SDSS survey for BHB stars. We give light curves and {gamma} radial velocities for three type ab RR Lyrae stars in the northern field; comparison with the nearby LONEOS survey shows that there is likely to be an equal number of lower-amplitude type ab RR Lyrae stars that we do not find. There are therefore at least twice as many BHB stars as type ab RR Lyrae stars in the northern field-similar to the ratio in the solar neighborhood. The velocity distribution of the southern field shows no evidence for an anomalous thick disk that was found by Gilmore et al.; the halo velocity peaks at a slightly prograde rotational velocity but there is also a significant retrograde halo component in this field. The velocity distribution in the northern field shows no evidence of Galactic rotation for |Z| {>=} 4 kpc and a slight prograde motion for |Z| < 4 kpc. The space densities of BHB stars in the northern field agree with an extrapolation of the power-law distribution recently derived by de Propris et al. For |Z| < 4 kpc, however, we observe an excess of BHB stars compared with this power law. We conclude that these BHB stars mostly belong to a spatially flattened, non-rotating inner halo component of the Milky Way in confirmation of the Kinman et al. analysis of Century survey BHB stars.

Kinman, T. D. [NOAO, P.O. Box 26732, Tucson, Arizona 85726 (United States); Brown, Warren R. [Smithsonian Astrophysical Observatory, 60 Garden St., Cambridge, MA 02138 (United States)

2011-05-15T23:59:59.000Z

122

CHARACTERISTICS AND EVOLUTION OF THE MAGNETIC FIELD AND CHROMOSPHERIC EMISSION IN AN ACTIVE REGION CORE OBSERVED BY HINODE  

Science Conference Proceedings (OSTI)

We describe the characteristics and evolution of the magnetic field and chromospheric emission in an active region core observed by the Solar Optical Telescope (SOT) on Hinode. Consistent with previous studies, we find that the moss is unipolar, the spatial distribution of magnetic flux evolves slowly, and that the magnetic field is only moderately inclined. We also show that the field-line inclination and horizontal component are coherent, and that the magnetic field is mostly sheared in the inter-moss regions where the highest magnetic flux variability is seen. Using extrapolations from spectropolarimeter magnetograms, we show that the magnetic connectivity in the moss is different from that in the quiet Sun because most of the magnetic field extends to significant coronal heights. The magnetic flux, field vector, and chromospheric emission in the moss also appear highly dynamic but actually show only small-scale variations in magnitude on timescales longer than the cooling times for hydrodynamic loops computed from our extrapolations, suggesting high-frequency (continuous) heating events. Some evidence is found for flux (Ca II intensity) changes on the order of 100-200 G (DN) on timescales of 20-30 minutes that could be taken as indicative of low-frequency heating. We find, however, that only a small fraction (10%) of our simulated loops would be expected to cool on these timescales, and we do not find clear evidence that the flux changes consistently produce intensity changes in the chromosphere. Using observations from the EUV Imaging Spectrometer (EIS), we also determine that the filling factor in the moss is {approx}16%, consistent with previous studies and larger than the size of an SOT pixel. The magnetic flux and chromospheric intensity in most individual SOT pixels in the moss vary by less than {approx}20% and {approx}10%, respectively, on loop cooling timescales. In view of the high energy requirements of the chromosphere, we suggest that these variations could be sufficient for the heating of 'warm' EUV loops, but that the high basal levels may be more important for powering the hot core loops rooted in the moss. The magnetic field and chromospheric emission appear to evolve gradually on spatial scales comparable to the cross-field scale of the fundamental coronal structures inferred from EIS measurements.

Brooks, David H.; Warren, Harry P. [Space Science Division, Code 7673, Naval Research Laboratory, Washington, DC 20375 (United States); Winebarger, Amy R., E-mail: dhbrooks@ssd5.nrl.navy.mi [Department of Physics, Alabama A and M, 4900 Meridian Street, Normal, AL 35762 (United States)

2010-09-10T23:59:59.000Z

123

Observation of cold Rb{sub 2} molecules trapped in an optical dipole trap using a laser-pulse-train technique  

SciTech Connect

In this work, we have developed and characterized a laser-pulse-train technique to observe cold Rb{sub 2} molecules trapped in an optical dipole trap. The molecules are produced in a magneto-optical trap, and then loaded into a crossed optical dipole trap. The time evolution of the molecular population is obtained by applying a laser pulse train, which photoionizes the ground-state molecules through intermediate molecular bands. Our results show that this technique allows us to obtain a faster data acquisition rate of the time evolution of the molecule population than other techniques.

Menegatti, Carlos R.; Marangoni, Bruno S.; Marcassa, Luis G. [Instituto de Fisica de Sao Carlos, Universidade de Sao Paulo, Caixa Postal 369, 13560-970, Sao Carlos, SP (Brazil)

2011-11-15T23:59:59.000Z

124

Assess the Efficacy of an Aerial Distant Observer Tool Capable of Rapid Analysis of Large Sections of Collector Fields: FY 2008 CSP Milestone Report, September 2008  

DOE Green Energy (OSTI)

We assessed the feasibility of developing an aerial Distant Observer optical characterization tool for collector fields in concentrating solar power plants.

Jorgensen, G.; Burkholder, F.; Gray, A.; Wendelin, T.

2009-02-01T23:59:59.000Z

125

The Retrieval of Asymmetric Tropical Cyclone Structures Using Doppler Radar Simulations and Observations with the Extended GBVTD Technique  

Science Conference Proceedings (OSTI)

The ground-based velocity track display (GBVTD) technique is extended to two Doppler radars to retrieve the structure of a tropical cyclones (TCs) circulation. With this extension, it is found that the asymmetric part of the TC radial wind ...

Yu-Chieng Liou; Tai-Chi Chen Wang; Wen-Chau Lee; Ya-Ju Chang

2006-04-01T23:59:59.000Z

126

Monte Carlo Studies of Geomagnetic Field Effects on the Imaging Air Cherenkov Technique for the MAGIC Telescope Site  

E-Print Network (OSTI)

Imaging air Cherenkov telescopes (IACTs) detect the Cherenkov light from extensive air showers (EAS) initiated by very high energy (VHE) gamma-rays impinging on the Earth's atmosphere. Due to the overwhelming background from hadron induced EAS, the discrimination of the rare gamma-like events is vital. The influence of the geomagnetic field (GF) on the development of EAS can further complicate the imaging air Cherenkov technique. The amount and the angular distribution of Cherenkov light from EAS can be obtained by means of Monte Carlo (MC) simulations. Here we present the results from dedicated MC studies of GF effects on images from gamma-ray initiated EAS for the MAGIC telescope site, where the GF strength is ~40 micro Tesla. The results from the MC studies suggest that GF effects degrade not only measurements of very low energy gamma-rays below ~100 GeV but also those at TeV-energies.

S. C. Commichau; A. Biland; J. L. Contreras; R. de los Reyes; A. Moralejo; J. Sitarek; D. Sobczynska

2008-02-18T23:59:59.000Z

127

Caltech Faint Galaxy Redshift Survey VII: Data Analysis Techniques and Redshifts in the Field J0053+1234  

E-Print Network (OSTI)

We present the techniques used to determine redshifts and to characterize the spectra of objects in the Caltech Faint Galaxy Redshift Survey in terms of spectral classes and redshift quality classes. These are then applied to spectra from an investigation of a complete sample of objects with $K_s<20$ mag in a 2 by 7.3 arcmin^2 field at J005325+1234. Redshifts were successfully obtained for 163 of the 195 objects in the sample; these redshifts lie in the range [0.173, 1.44] and have a median of 0.58 (excluding 24 Galactic stars). The sample includes two broad lined AGNs and one QSO.

Judith G. Cohen; David W. Hogg; Michael A. Pahre; Roger Blandford; Patrick L. Shopbell; Kevin Richberg

1998-09-05T23:59:59.000Z

128

Strong Mixing Events Observed near the Tropopause with the MU Radar and High-Resolution Balloon Techniques  

Science Conference Proceedings (OSTI)

In the present paper, strong isotropic radar echo enhancements are shown that are related to the existence of nearly statically neutralized layers (40120 m thick) observed with high-resolution (10 cm) temperature measurements performed during ...

H. Luce; S. Fukao; F. Dalaudier; M. Crochet

2002-10-01T23:59:59.000Z

129

Multi-year Satellite and Surface Observations of AOD in support of Two-Column Aerosol Project (TCAP) Field Campaign  

SciTech Connect

We use combined multi-year measurements from the surface and space for assessing the spatial and temporal distribution of aerosol properties within a large (~400x400 km) region centered on Cape Cod, Massachusetts, along the East Coast of the United States. The ground-based Aerosol Robotic Network (AERONET) measurements at Marthas Vineyard Coastal Observatory (MVCO) site and Moderate Resolution Imaging Spectrometer (MODIS) sensors on board the Terra and Aqua satellites provide horizontal and temporal variations of aerosol optical depth, while the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) offers the altitudes of aerosol-layers. The combined ground-based and satellite measurements indicated several interesting features among which were the large differences in the aerosol properties observed in July and February. We applied the climatology of aerosol properties for designing the Two-Column Aerosol Project (TCAP), which is supported by the U.S. Department of Energys (DOEs) Atmospheric Radiation Measurement (ARM) Program. The TCAP field campaign involves 12-month deployment (started July 1, 2012) of the ground-based ARM Mobile Facility (AMF) and Mobile Aerosol Observing System (MAOS) on Cape Cod and complimentary aerosol observations from two research aircraft: the DOE Gulfstream-1 (G-1) and the National Aeronautics and Space Administration (NASA) B200 King Air. Using results from the coordinated G-1 and B200 flights during the recent (July, 2012) Intensive Observation Period, we demonstrated that the G-1 in situ measurements and B200 active remote sensing can provide complementary information on the temporal and spatial changes of the aerosol properties off the coast of North America.

Kassianov, Evgueni I.; Chand, Duli; Berg, Larry K.; Fast, Jerome D.; Tomlinson, Jason M.; Ferrare, R.; Hostetler, Chris A.; Hair, John

2012-11-01T23:59:59.000Z

130

Comparison of Observed and Modeled Drifter Trajectories in Coastal Regions: An Improvement through Adjustments for Observed Drifter Slip and Errors in Wind Fields  

Science Conference Proceedings (OSTI)

Lagrangian particle tracking using three-dimensional (3D) numerical modeling approaches has become an important tool in coastal oceanography. In this note, an approach is described that can reduce the difference between observed and numerical ...

K. P. Edwards; F. E. Werner; B. O. Blanton

2006-11-01T23:59:59.000Z

131

Marine Stratocumulus Cloud Fields off the Coast of Southern California Observed Using LANDSAT Imagery. Part II: Textural Analysis  

Science Conference Proceedings (OSTI)

Statistical measures of the spatial distributions of gray levels (cloud reflectivities) are determined for LANDSAT Multispectral Scanner digital data. Textural properties for twelve stratocumulus cloud fields, seven cumulus fields, and two cirrus ...

R. M. Welch; S. K. Sengupta; K. S. Kuo

1988-04-01T23:59:59.000Z

132

Comparison of Four Cloud Schemes in Simulating the Seasonal Mean Field Forced by the Observed Sea Surface Temperature  

Science Conference Proceedings (OSTI)

The impacts of four stratiform cloud parameterizations on seasonal mean fields are investigated using the global version of the Experimental Climate Prediction Center (ECPC) global-to-regional forecast system (G-RSM). The simulated fields are ...

Akihiko Shimpo; Masao Kanamitsu; Sam F. Iacobellis; Song-You Hong

2008-07-01T23:59:59.000Z

133

Coupled-channels density-matrix approach to low-energy nuclear collision dynamics: A technique for quantifying quantum decoherence effects on reaction observables  

E-Print Network (OSTI)

The coupled-channels density-matrix technique for nuclear reaction dynamics, which is based on the Liouville-von Neumann equation with Lindblad dissipative terms, is developed with the inclusion of full angular momentum couplings. It allows a quantitative study of the role and importance of quantum decoherence in nuclear scattering. Formulae of asymptotic observables that can reveal effects of quantum decoherence are given. A method for extracting energy-resolved scattering information from the time-dependent density matrix is introduced. As an example, model calculations are carried out for the low-energy collision of the $^{16}$O projectile on the $^{154}$Sm target.

Alexis Diaz-Torres

2010-10-18T23:59:59.000Z

134

The Impact of NaH+ Exchange on Long-Term Borosilicate Glass Corrosion: Experiments and Field Observations  

SciTech Connect

New insights from laboratory experiments coupled with field observations indicate that pore water solutions that eventually breach containment materials in disposal systems will interact with sodium-excess borosilicate waste glass in an unexpected way. Because many glass waste forms are relatively sodium-rich, they are especially vulnerable to Na+H+ exchange (ion exchange or simply, IEX). Although the kinetics of this process has been previously investigated for early-stage glass reactions, the implications of IEX for long-term dissolution resistance have not yet been realized. Non-radioactive glass with major- and minor-element chemical compositions similar to Hanford high-Na waste glass were subjected to dissolution experiments to quantify the rates of matrix dissolution and IEX rates. Single-Pass Flow-Through (SPFT) tests quantified the IEX rate at 40C pH = 8 and silica saturation and showed a dependence upon the fraction of excess sodium in the glass. The equation for the rate (in moles of sodium released per meter squared per second) dependence on excess sodium is: log10rate[mol/(m2?s)] = 0.63R + (-11.0); r2 = 0.86 where R = molar Na+/?(M3+). Further, rates of Na release are slower by ?30% in D2O-based solutions compared to those in H2O. These results are the hallmark of IEX reactions. Our results are compared against those from a lysimeter field experiment consisting of glasses buried in Hanford sand and to dissolution experiments conducted with a Pressurized Unsaturated Flow (PUF) apparatus. These longer-term tests indicate an initial decrease in dissolution rate by a factor of 10, and then a constant steady-state rate thereafter. Thus, these data show that IEX reactions are important at near-saturation conditions and effectively prevent dissolution rates from falling below a minimum value. In sum, IEX modifies the long-term behavior of glass dissolution and models cannot assume that dissolution of Na-rich borosilicate glass will decrease by a factor of 100 to 1000, as argued for minerals and less sodic glasses.

Icenhower, Jonathan P.; Pierce, Eric M.; McGrail, B. Peter

2009-05-01T23:59:59.000Z

135

COLLABORATIVE RESEARCH:USING ARM OBSERVATIONS & ADVANCED STATISTICAL TECHNIQUES TO EVALUATE CAM3 CLOUDS FOR DEVELOPMENT OF STOCHASTIC CLOUD-RADIATION  

SciTech Connect

The long-range goal of several past and current projects in our DOE-supported research has been the development of new and improved parameterizations of cloud-radiation effects and related processes, using ARM data, and the implementation and testing of these parameterizations in global models. The main objective of the present project being reported on here has been to develop and apply advanced statistical techniques, including Bayesian posterior estimates, to diagnose and evaluate features of both observed and simulated clouds. The research carried out under this project has been novel in two important ways. The first is that it is a key step in the development of practical stochastic cloud-radiation parameterizations, a new category of parameterizations that offers great promise for overcoming many shortcomings of conventional schemes. The second is that this work has brought powerful new tools to bear on the problem, because it has been a collaboration between a meteorologist with long experience in ARM research (Somerville) and a mathematician who is an expert on a class of advanced statistical techniques that are well-suited for diagnosing model cloud simulations using ARM observations (Shen).

Somerville, Richard

2013-08-22T23:59:59.000Z

136

ON THE FORCE-FREE NATURE OF PHOTOSPHERIC SUNSPOT MAGNETIC FIELDS AS OBSERVED FROM HINODE (SOT/SP)  

SciTech Connect

A magnetic field is force-free if there is no interaction between it and the plasma in the surrounding atmosphere, i.e., electric currents are aligned with the magnetic field, giving rise to zero Lorentz force. The computation of various magnetic parameters, such as magnetic energy (using the virial theorem), gradient of twist of sunspot magnetic fields (computed from the force-free parameter {alpha}), and any kind of extrapolation, heavily hinges on the force-free approximation of the photospheric sunspot magnetic fields. Thus, it is of vital importance to inspect the force-free behavior of sunspot magnetic fields. The force-free nature of sunspot magnetic fields has been examined earlier by some researchers, ending with incoherent results. Accurate photospheric vector field measurements with high spatial resolution are required to inspect the force-free nature of sunspots. For this purpose, we use several vector magnetograms of high spatial resolution obtained from the Solar Optical Telescope/Spectro-Polarimeter on board Hinode. Both the necessary and sufficient conditions for force-free nature are examined by checking the global and local nature of equilibrium magnetic forces over sunspots. We find that sunspot magnetic fields are not very far from the force-free configuration, although they are not completely force-free on the photosphere. The umbral and inner penumbral fields are more force-free than the middle and outer penumbral fields. During their evolution, sunspot magnetic fields are found to maintain their proximity to force-free field behavior. Although a dependence of net Lorentz force components is seen on the evolutionary stages of the sunspots, we do not find a systematic relationship between the nature of sunspot magnetic fields and the associated flare activity. Further, we examine whether the fields at the photosphere follow linear or nonlinear force-free conditions. After examining this in various complex and simple sunspots, we conclude that, in either case, photospheric sunspot magnetic fields are closer to satisfying the nonlinear force-free field approximation.

Tiwari, Sanjiv Kumar, E-mail: tiwari@mps.mpg.de [Udaipur Solar Observatory, Physical Research Laboratory, Dewali, Bari Road, Udaipur 313 001 (India)

2012-01-01T23:59:59.000Z

137

A Technique for Analyzing Optimal Relationships among Multiple Sets of Data Fields. Part H: A Reliability Case Study  

Science Conference Proceedings (OSTI)

In Part I a multiple-set canonical correlation analysis (MCCA) was proposed to generalize the conventional two-set canonical correlation analysis. The MCCA seeks the optimal correlation among more than two data fields through a diagonalization of ...

Jeng-Ming Chen; C-P. Chang

1994-11-01T23:59:59.000Z

138

An Iterative Solver with a Convergence-Acceleration Technique for Pressure Field in an Uneven-Spacing Grid System  

Science Conference Proceedings (OSTI)

A straightforward iterative method is developed for solving the pressure field in three-dimensional, anelastic, nonhydrostatic, mesoscale models with uneven-spacing grid systems for which direct FFT (fan Fourier transform) schemes cannot be ...

Chih-Yue Jim Kao; Lawrence H. Auer

1990-07-01T23:59:59.000Z

139

POSSIBLE EVIDENCE FOR A FISK-TYPE HELIOSPHERIC MAGNETIC FIELD. I. ANALYZING ULYSSES/KET ELECTRON OBSERVATIONS  

Science Conference Proceedings (OSTI)

The propagation of energetic charged particles in the heliospheric magnetic field is one of the fundamental problems in heliophysics. In particular, the structure of the heliospheric magnetic field remains an unsolved problem and is discussed as a controversial topic. The first successful analytic approach to the structure of the heliospheric magnetic field was the Parker field. However, the measurements of the Ulysses spacecraft at high latitudes revealed the possible need for refinements of the existing magnetic field model during solar minimum. Among other reasons, this led to the development of the Fisk field. This approach is highly debated and could not be ruled out with magnetic field measurements so far. A promising method to trace this magnetic field structure is to model the propagation of electrons in the energy range of a few MeV. Employing three-dimensional and time-dependent simulations of the propagation of energetic electrons, this work shows that the influence of a Fisk-type field on the particle transport in the heliosphere leads to characteristic variations of the electron intensities on the timescale of a solar rotation. For the first time it is shown that the Ulysses count rates of 2.5-7 MeV electrons contain the imprint of a Fisk-type heliospheric magnetic field structure. From a comparison of simulation results and the Ulysses count rates, realistic parameters for the Fisk theory are derived. Furthermore, these parameters are used to investigate the modeled relative amplitudes of protons and electrons, including the effects of drifts.

Sternal, O.; Heber, B.; Kopp, A. [Institut fuer Experimentelle und Angewandte Physik, Christian-Albrechts-Universitaet zu Kiel, Leibnizstr. 11, 24118 Kiel (Germany); Engelbrecht, N. E.; Burger, R. A.; Ferreira, S. E. S.; Potgieter, M. S. [Center for Space Research, North-West University, 2520 Potchefstroom, South Africa. (South Africa); Fichtner, H.; Scherer, K., E-mail: oliver.sternal@rub.de [Institut fuer Theoretische Physik, Lehrstuhl IV: Weltraum- und Astrophysik, Ruhr-Universitaet Bochum, 44780 Bochum, Germany. (Germany)

2011-11-01T23:59:59.000Z

140

In Situ Observation of Cirrus Scattering Phase Functions with 22 and 46 Halos: Cloud Field Study on 19 February 1998  

Science Conference Proceedings (OSTI)

Observations of halos and related phenomena due to ice crystals are commonly reported from ground observations and presented in the literature. Nevertheless, ice crystal characteristics have only been poorly documented from in situ measurements ...

Frederique Auriol; Jean-Franois Gayet; Guy Febvre; Olivier Jourdan; Laurent Labonnote; Gerard Brogniez

2001-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "field techniques observation" 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

Deducing Ground-to-Air Emissions from Observed Trace Gas Concentrations: A Field Trial with Wind Disturbance  

Science Conference Proceedings (OSTI)

Inverse-dispersion techniques allow inference of a gas emission rate Q from measured air concentration. In ideal surface layer problems, where MoninObukhov similarity theory (MOST) describes the winds transporting the gas, the application of ...

T. K. Flesch; J. D. Wilson; L. A. Harper

2005-04-01T23:59:59.000Z

142

Inference of Cirrus Cloud Properties Using Satellite-observed Visible and Infrared Radiances. Part I: Parameterization of Radiance Fields  

Science Conference Proceedings (OSTI)

Current techniques for deriving cirrus optical depth and altitude from visible (0.65 ?m) and infrared (11.5 ?m) satellite data use radiative transfer calculations based on scattering phase functions of spherical water droplets. This study ...

Patrick Minnis; Kuo-Nan Liou; Yoshihide Takano

1993-05-01T23:59:59.000Z

143

Gullfaks development provides challenges; Part 2: Sand control combines with various EOR techniques to increase plateau production -- further developments will extend field life  

Science Conference Proceedings (OSTI)

The introductory article presented last month described Gullfaks field's history, and how it was discovered and appraised in Norway's North Sea Block 34/10 in the early 1980s. The field's complex geology and Statoil's strategy for developing various productive zones were explained. This concluding article describes evolution and status of well completion methods the operator uses in Gullfaks. A new monobore completion configuration for 5 1/2 and 7-in. tubing is described. Then major discussions cover: (1) sand control-gravel packing, stimulation, producing below bubble point techniques, and chemical methods; and (2) state-of-the-art techniques for improving oil recovery, including Water-Alternating-Gas (WAG) injection, thin polymer gel injection and surfactant flooding. Future needs and possible new methods are also covered.

Tollefsen, S.; Graue, E.; Svinndal, S.

1994-05-01T23:59:59.000Z

144

Marine Stratocumulus Cloud Fields off the Coast of Southern California Observed Using LANDSAT Imagery. Part I: Structural Characteristics  

Science Conference Proceedings (OSTI)

The structural characteristics of stratocumulus cloud fields off the coast of southern California are investigated using LANDSAT Multispectral Scanner (MSS) imagery. Twelve scenes in this area are examined along with three other stratocumulus ...

R. M. Welch; K. S. Kuo; B. A. Wielicki; S. K. Sengupta; L. Parker

1988-04-01T23:59:59.000Z

145

Effect of Sea Breeze on Air Pollution in the Greater Athens Area. Part I: Numerical Simulations and Field Observations  

Science Conference Proceedings (OSTI)

Numerical simulations compared with field measurements are used to explain the effect of sea breezes on photochemical smog episodes in Athens during the Mediterranean Campaign of Photochemical Tracers on 1214 September 1994. The numerical ...

Alain Clappier; Alberto Martilli; Paola Grossi; Philippe Thunis; Francesco Pasi; Bernd C. Krueger; Bertrand Calpini; Giovanni Graziani; Hubert van den Bergh

2000-04-01T23:59:59.000Z

146

Electrical vs. Hydraulic Rock Types in Clastic Reservoirs: Pore-Scale Understanding Verified with Field Observations in the Gulf of Mexico, U.S.  

E-Print Network (OSTI)

with Field Observations in the Gulf of Mexico, U.S. Chicheng Xu*, Carlos Torres-Verdín, and Shuang Gao of turbidite oil reservoir in the Gulf of Mexico shows that inclusion of resistivity logs in the classification oil reservoir in the Gulf of Mexico, US. Electrical and Hydraulic Conductivity Models In a porous rock

Torres-Verdín, Carlos

147

Observations of the Wind Field in Tornadoes, Funnel Clouds, and Wall Clouds with a Portable Doppler Radar  

Science Conference Proceedings (OSTI)

A severe-storm intercept field program was held in Oklahoma and nearby parts of Texas during the 198738 spring seasons. The purpose of the experiment was to use, for the first time, a low-power, portable, continuous-wave (CW), 3-cm Doppler radar ...

H. B. Bluestein; W. P. Unruh

1989-12-01T23:59:59.000Z

148

The Summer Wind Field Between 80 and 93 km Observed by the MST Radar at Poker Flat, Alaska (65N)  

Science Conference Proceedings (OSTI)

Results of an analysis of the summertime wind field between 8093 km over Poker Flat, Alaska are presented. The data were obtained using the large, but as yet incomplete, MST radar at Poker Flat, and cover the periods 17 June13 July 1979, and 22 ...

D. A. Carter; B. B. Balsley

1982-12-01T23:59:59.000Z

149

Normal-Mode Rossby Waves Observed in the Wavenumber 15 Geopotential Fields of the Stratosphere and Troposphere  

Science Conference Proceedings (OSTI)

Daily global geopotential height fields have been analyzed for zonally propagating, planetary scale structures with periods in the range of 4 to 30 days. The geopotentials extend from the 850- to 2-mb levels and 85N to 85S latitudes, and ...

David E. Venne

1989-04-01T23:59:59.000Z

150

Observations of Saharan Aerosols: Results of ECLATS Field Experiment. Part I: Optical Thicknesses and Aerosol Size Distributions  

Science Conference Proceedings (OSTI)

A series of ground-based and airborne observations of desert aerosols, the ECLATS experiment was carried out in December 1980 in the vicinity of Niamey (Niger). This paper deals with aerosol optical thicknesses and size distributions derived from ...

Y. Fouquart; B. Bonnel; M. Chaoui Roquai; R. Santer; A. Cerf

1987-01-01T23:59:59.000Z

151

Accuracy of Diagnostic Heat and Moisture Budgets Using SESAME-79 Field Data as Revealed by Observing System Simulation Experiments  

Science Conference Proceedings (OSTI)

The accuracy of diagnostic heat and moisture budgets using the AVE-SESAME 1979 data is investigated through a series of observing system simulation experiments. The four-dimensional (including time) data set provided by a mesoscale model is used ...

Ying-Hwa Kuo; Richard A. Anthes

1984-08-01T23:59:59.000Z

152

Increased oil production and reserves from improved completion techniques in the Bluebell Field, Uinta Basin, Utah. Annual report, September 30, 1993--September 30, 1994  

SciTech Connect

The Bluebell field produces from the Tertiary lower Green River and Wasatch Formations of the Uinta Basin, Utah. The productive interval consists of thousands of feet of interbedded fractured clastic and carbonate beds deposited in a fluvial-dominated deltaic lacustrine environment, sandstones deposited in fluvial-dominated deltas; and carbonates and some interbedded sandstones of the lower Wasatch transition deposited in mud flats. Bluebell project personnel are studying ways to improve completion techniques used in the field to increase primary production in both new wells and recompletions. The study includes detailed petrographic examination of the different lithologic reservoir types in both the outcrop and core. Outcrop, core, and geophysical logs are being used to identify and map important depositional cycles. Petrographic detail will be used to improve log calculation methods which are currently highly questionable due to varying water chemistry and clay content in the Green River and Wasatch Formations. Field mapping of fractures and their relationship to basin tectonics helps predict the orientation of open fractures in the subsurface. The project includes acquiring bore-hole imaging logs from new wells in the Bluebell field thereby obtaining detailed subsurface fracture data previously not available. Reservoir simulation models are being constructed to improve the understanding of pressure and fluid flow within the reservoir. A detailed database of well completion histories has been compiled and will be studied to determine which were the most and the least effective methods used in the past.

Allison, M.

1995-07-01T23:59:59.000Z

153

Definition: Ground Electromagnetic Techniques | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Ground Electromagnetic Techniques Jump to: navigation, search Dictionary.png Ground Electromagnetic Techniques Ground electromagnetic techniques measure electromagnetic fields in order to determine subsurface electrical resistivity with the earth surface as the observation point.[1] View on Wikipedia Wikipedia Definition The electromagnetic force is one of the four fundamental interactions in nature, the other three being the strong interaction, the weak interaction, and gravitation. This force is described by electromagnetic fields, and has innumerable physical instances including the interaction of electrically charged particles and the interaction of uncharged magnetic force fields with electrical conductors. The word

154

Observation of coupled vortex gyrations by 70-ps-time and 20-nm-space- resolved full-field magnetic transmission soft x-ray microscopy  

SciTech Connect

We employed time-and space-resolved full-field magnetic transmission soft x-ray microscopy to observe vortex-core gyrations in a pair of dipolar-coupled vortex-state Permalloy (Ni{sub 80}Fe{sub 20}) disks. The 70 ps temporal and 20 nm spatial resolution of the microscope enabled us to simultaneously measure vortex gyrations in both disks and to resolve the phases and amplitudes of both vortex-core positions. We observed their correlation for a specific vortex-state configuration. This work provides a robust and direct method of studying vortex gyrations in dipolar-coupled vortex oscillators.

Jung, Hyunsung; Yu, Young-Sang; Lee, Ki-Suk; Im, Mi-Young; Fischer, Peter; Bocklage, Lars; Vogel, Andreas; Bolte, Markus; Meier, Guido; Kim, Sang-Koog

2010-09-01T23:59:59.000Z

155

Comparison of acoustic impedance and time-amplitude analysis techniques for reservoir description of a Gulf of Mexico shelf edge Clastic Field  

SciTech Connect

Post-stack, time-amplitude techniques are routinely used in the estimation of reserves and the positioning of wells in low impedance, unconsolidated reservoir sands in the offshore Gulf of Mexico (Texas and Louisiana). Time amplitude analysis of 3D seismic data, when properly calibrated, can yield reliable estimates of net hydrocarbon pay, reservoir distribution, and volumetrics. Acoustic impedance (Al) analysis can also be used for such prospect appraisal and development work. However, the combined use of both techniques for reservoir description is not common. Some advantages in acoustic impedance (over amplitude analysis) are: (1) properly constrained Al traces better image the reservoir rock configuration (that is, they provide a more [open quotes]geologic[close quotes] view) thereby facilitating interpretation of reservoir distribution and interconnectivity, and (2) Al volumetrics methodology can provide more accurate estimates of average pay for reservoirs that are not seismically isolated from one another. A possible disadvantage is the difficulty in incorporating a proper baseline (low frequency) constraint for the required Al trace inversion. This paper reports the advantages and disadvantages of both techniques in characterizing net pay, volumetrics, and reservoir continuity in a producing Gulf of Mexico oil field in a shelf-edge delta depositional system.

Rowlett, H.E.; Holcombe, H.T.; Cohn, B.P.; Wilson, W.W.; Mills, W.H. (BP Exploration Inc., Houston, TX (United States))

1993-02-01T23:59:59.000Z

156

Evaluation of a Data Assimilation Technique for a Mesoscale Meteorological Model Used for Air Quality Modeling  

Science Conference Proceedings (OSTI)

An observational data assimilation (ODA) technique was evaluated based on both its direct effect on meteorological model fields and its indirect effect on the results of two air quality models that input these meteorological fields: a Lagrangian ...

Takato Umeda; Philip T. Martien

2002-01-01T23:59:59.000Z

157

The Thermal Aspects of Relativistic Quantum Field Theory as an Observational Window in a Deeper Layer of Quantum Space-Time or: Dirac's Revenge  

E-Print Network (OSTI)

In this paper we shall derive the thermal properties of the relativistic quantum vacuum from a more primordial underlying structure which shares some properties with the old Dirac-sea picture. We show in particular how the Tomita-KMS structure in RQFT is a consequence of the structure and dynamics of the underlying pattern of vacuum fluctuations. We explain the origin of the doubling phenomenon in thermofield theory and the duality symmetry between a local algebra of fields or observables and its commutant in RQFT and give an interpretation of the notion of thermal time.

Manfred Requardt

2013-09-05T23:59:59.000Z

158

A High shear stress segment along the San Andreas Fault: Inferences based on near-field stress direction and stress magnitude observations in the Carrizo Plain Area  

SciTech Connect

Nearly 200 new in-situ determinations of stress directions and stress magnitudes near the Carrizo plain segment of the San Andreas fault indicate a marked change in stress state occurring within 20 km of this principal transform plate boundary. A natural consequence of this stress transition is that if the observed near-field ``fault-oblique`` stress directions are representative of the fault stress state, the Mohr-Coulomb shear stresses resolved on San Andreas sub-parallel planes are substantially greater than previously inferred based on fault-normal compression. Although the directional stress data and near-hydrostatic pore pressures, which exist within 15 km of the fault, support a high shear stress environment near the fault, appealing to elevated pore pressures in the fault zone (Byerlee-Rice Model) merely enhances the likelihood of shear failure. These near-field stress observations raise important questions regarding what previous stress observations have actually been measuring. The ``fault-normal`` stress direction measured out to 70 km from the fault can be interpreted as representing a comparable depth average shear strength of the principal plate boundary. Stress measurements closer to the fault reflect a shallower depth-average representation of the fault zone shear strength. If this is true, only stress observations at fault distances comparable to the seismogenic depth will be representative of the fault zone shear strength. This is consistent with results from dislocation monitoring where there is pronounced shear stress accumulation out to 20 km of the fault as a result of aseismic slip within the lower crust loading the upper locked section. Beyond about 20 km, the shear stress resolved on San Andreas fault-parallel planes becomes negligible. 65 refs., 15 figs.

Castillo, D. A., [Department of Geology and Geophysics, University of Adelaide (Australia); Younker, L.W. [Lawrence Livermore National Lab., CA (United States)

1997-01-30T23:59:59.000Z

159

CONSTRAINTS ON COSMIC RAYS, MAGNETIC FIELDS, AND DARK MATTER FROM GAMMA-RAY OBSERVATIONS OF THE COMA CLUSTER OF GALAXIES WITH VERITAS AND FERMI  

SciTech Connect

Observations of radio halos and relics in galaxy clusters indicate efficient electron acceleration. Protons should likewise be accelerated and, on account of weak energy losses, can accumulate, suggesting that clusters may also be sources of very high energy (VHE; E > 100 GeV) gamma-ray emission. We report here on VHE gamma-ray observations of the Coma galaxy cluster with the VERITAS array of imaging Cerenkov telescopes, with complementing Fermi Large Area Telescope observations at GeV energies. No significant gamma-ray emission from the Coma Cluster was detected. Integral flux upper limits at the 99% confidence level were measured to be on the order of (2-5) Multiplication-Sign 10{sup -8} photons m {sup -2} s {sup -1} (VERITAS, >220 GeV) and {approx}2 Multiplication-Sign 10{sup -6} photons m {sup -2} s {sup -1} (Fermi, 1-3 GeV), respectively. We use the gamma-ray upper limits to constrain cosmic rays (CRs) and magnetic fields in Coma. Using an analytical approach, the CR-to-thermal pressure ratio is constrained to be <16% from VERITAS data and <1.7% from Fermi data (averaged within the virial radius). These upper limits are starting to constrain the CR physics in self-consistent cosmological cluster simulations and cap the maximum CR acceleration efficiency at structure formation shocks to be <50%. Alternatively, this may argue for non-negligible CR transport processes such as CR streaming and diffusion into the outer cluster regions. Assuming that the radio-emitting electrons of the Coma halo result from hadronic CR interactions, the observations imply a lower limit on the central magnetic field in Coma of {approx}(2-5.5) {mu}G, depending on the radial magnetic field profile and on the gamma-ray spectral index. Since these values are below those inferred by Faraday rotation measurements in Coma (for most of the parameter space), this renders the hadronic model a very plausible explanation of the Coma radio halo. Finally, since galaxy clusters are dark matter (DM) dominated, the VERITAS upper limits have been used to place constraints on the thermally averaged product of the total self-annihilation cross section and the relative velocity of the DM particles, ({sigma}v).

Arlen, T. [Department of Physics and Astronomy, University of California, Los Angeles, CA 90095 (United States); Aune, T.; Bouvier, A. [Santa Cruz Institute for Particle Physics and Department of Physics, University of California, Santa Cruz, CA 95064 (United States); Beilicke, M.; Buckley, J. H.; Bugaev, V.; Dickherber, R. [Department of Physics, Washington University, St. Louis, MO 63130 (United States); Benbow, W. [Fred Lawrence Whipple Observatory, Harvard-Smithsonian Center for Astrophysics, Amado, AZ 85645 (United States); Byrum, K. [Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439 (United States); Cannon, A.; Collins-Hughes, E. [School of Physics, University College Dublin, Belfield, Dublin 4 (Ireland); Cesarini, A.; Connolly, M. P. [School of Physics, National University of Ireland Galway, University Road, Galway (Ireland); Ciupik, L. [Astronomy Department, Adler Planetarium and Astronomy Museum, Chicago, IL 60605 (United States); Cui, W.; Feng, Q.; Finley, J. P. [Department of Physics, Purdue University, West Lafayette, IN 47907 (United States); Dumm, J. [School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455 (United States); Falcone, A. [Department of Astronomy and Astrophysics, 525 Davey Lab, Pennsylvania State University, University Park, PA 16802 (United States); Federici, S., E-mail: pohlmadq@gmail.com, E-mail: christoph.pfrommer@h-its.org [DESY, Platanenallee 6, D-15738 Zeuthen (Germany); and others

2012-10-01T23:59:59.000Z

160

A Bootstrap Technique for Testing the Relationship between Local-Scale Radar Observations of Cloud Occurrence and Large-Scale Atmospheric Fields  

Science Conference Proceedings (OSTI)

A classification scheme is created to map the synoptic-scale (large scale) atmospheric state to distributions of local-scale cloud properties. This mapping is accomplished by a neural network that classifies 17 months of synoptic-scale initial ...

Roger Marchand; Nathaniel Beagley; Sandra E. Thompson; Thomas P. Ackerman; David M. Schultz

2006-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "field techniques observation" 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

Observed local and remote influences of vegetation on the atmosphere across North America using a model-validated statistical technique that first excludes oceanic forcings  

Science Conference Proceedings (OSTI)

The observed local and non-local influences of vegetation on the atmosphere across North America are quantified after first removing the oceans impact. The interaction between vegetation and the atmosphere is dominated by forcing from the ...

Fuyao Wang; Michael Notaro; Zhengyu Liu; Guangshan Chen

162

DEEP X-RAY OBSERVATIONS OF THE YOUNG HIGH-MAGNETIC-FIELD RADIO PULSAR J1119-6127 AND SUPERNOVA REMNANT G292.2-0.5  

SciTech Connect

High-magnetic-field radio pulsars are important transition objects for understanding the connection between magnetars and conventional radio pulsars. We present a detailed study of the young radio pulsar J1119-6127, which has a characteristic age of 1900 yr and a spin-down-inferred magnetic field of 4.1 Multiplication-Sign 10{sup 13} G, and its associated supernova remnant G292.2-0.5, using deep XMM-Newton and Chandra X-ray Observatory exposures of over 120 ks from each telescope. The pulsar emission shows strong modulation below 2.5 keV with a single-peaked profile and a large pulsed fraction of 0.48 {+-} 0.12. Employing a magnetic, partially ionized hydrogen atmosphere model, we find that the observed pulse profile can be produced by a single hot spot of temperature 0.13 keV covering about one-third of the stellar surface, and we place an upper limit of 0.08 keV for an antipodal hot spot with the same area. The non-uniform surface temperature distribution could be the result of anisotropic heat conduction under a strong magnetic field, and a single-peaked profile seems common among high-B radio pulsars. For the associated remnant G292.2-0.5, its large diameter could be attributed to fast expansion in a low-density wind cavity, likely formed by a Wolf-Rayet progenitor, similar to two other high-B radio pulsars.

Ng, C.-Y.; Kaspi, V. M. [Department of Physics, McGill University, Montreal, QC H3A 2T8 (Canada); Ho, W. C. G. [School of Mathematics, University of Southampton, Southampton SO17 1BJ (United Kingdom); Weltevrede, P. [Jodrell Bank Centre for Astrophysics, University of Manchester, Alan Turing Building, Manchester M13 9PL (United Kingdom); Bogdanov, S. [Columbia Astrophysics Laboratory, Columbia University, 550 West 120th Street, New York, NY 10027 (United States); Shannon, R. [CSIRO Astronomy and Space Sciences, Australia Telescope National Facility, Marsfield, NSW 2210 (Australia); Gonzalez, M. E., E-mail: ncy@physics.mcgill.ca [Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1 (Canada)

2012-12-10T23:59:59.000Z

163

THE FIRST PUBLIC RELEASE OF SOUTH POLE TELESCOPE DATA: MAPS OF A 95 deg{sup 2} FIELD FROM 2008 OBSERVATIONS  

SciTech Connect

The South Pole Telescope (SPT) has nearly completed a 2500 deg{sup 2} survey of the southern sky in three frequency bands. Here, we present the first public release of SPT maps and associated data products. We present arcminute-resolution maps at 150 GHz and 220 GHz of an approximately 95 deg{sup 2} field centered at R.A. 82.{sup 0}7, decl. -55 Degree-Sign . The field was observed to a depth of approximately 17 {mu}K arcmin at 150 GHz and 41 {mu}K arcmin at 220 GHz during the 2008 austral winter season. Two variations on map filtering and map projection are presented, one tailored for producing catalogs of galaxy clusters detected through their Sunyaev-Zel'dovich effect signature and one tailored for producing catalogs of emissive sources. We describe the data processing pipeline, and we present instrument response functions, filter transfer functions, and map noise properties. All data products described in this paper are available for download at http://pole.uchicago.edu/public/data/maps/ra5h30dec-55 and from the NASA Legacy Archive for Microwave Background Data Analysis server. This is the first step in the eventual release of data from the full 2500 deg{sup 2} SPT survey.

Schaffer, K. K.; Crawford, T. M.; Benson, B. A.; Bleem, L. E.; Carlstrom, J. E.; Chang, C. L.; Crites, A. T.; Hoover, S.; Keisler, R. [Kavli Institute for Cosmological Physics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637 (United States); Aird, K. A.; Hrubes, J. D. [University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637 (United States); Cho, H. M. [NIST Quantum Devices Group, 325 Broadway Mailcode 817.03, Boulder, CO 80305 (United States); De Haan, T.; Dobbs, M. A.; Holder, G. P. [Department of Physics, McGill University, 3600 Rue University, Montreal, Quebec H3A 2T8 (Canada); George, E. M.; Holzapfel, W. L. [Department of Physics, University of California, Berkeley, CA 94720 (United States); Halverson, N. W. [Department of Astrophysical and Planetary Sciences and Department of Physics, University of Colorado, Boulder, CO 80309 (United States); Joy, M. [Department of Space Science, VP62, NASA Marshall Space Flight Center, Huntsville, AL 35812 (United States); Knox, L., E-mail: kschaf2@saic.edu [Department of Physics, University of California, One Shields Avenue, Davis, CA 95616 (United States); and others

2011-12-10T23:59:59.000Z

164

Hubble Space Telescope hot Jupiter Transmission Spectral Survey: detection of water in HAT-P-1b from Wide Field Camera 3 near-infrared spatial scan observations  

E-Print Network (OSTI)

We present Hubble Space Telescope near-infrared transmission spectroscopy of the transiting hot-Jupiter HAT-P-1b. We observed one transit with Wide Field Camera 3 using the G141 low-resolution grism to cover the wavelength range 1.087- 1.678 {\\mu}m. These time series observations were taken with the newly available spatial scan mode that increases the duty cycle by nearly a factor of two, thus improving the resulting photometric precision of the data. We measure a planet-to-star radius ratio of Rp/R*=0.11709+/-0.00038 in the white light curve with the centre of transit occurring at 2456114.345+/-0.000133 (JD). We achieve S/N levels per exposure of 1840 (0.061%) at a resolution of {\\Delta\\lambda}=19.2nm (R~70) in the 1.1173 - 1.6549{\\mu}m spectral region, providing the precision necessary to probe the transmission spectrum of the planet at close to the resolution limit of the instrument. We compute the transmission spectrum using both single target and differential photometry with similar results. The resultan...

Wakeford, H R; Deming, D; Gibson, N P; Fortney, J J; Burrows, A S; Ballester, G; Nikolov, N; Aigrain, S; Henry, G; Knutson, H; Etangs, A Lecavelier des; Pont, F; Showman, A P; Vidal-Madjar, A; Zahnle, K

2013-01-01T23:59:59.000Z

165

THREE-DIMENSIONAL FEATURES OF THE OUTER HELIOSPHERE DUE TO COUPLING BETWEEN THE INTERSTELLAR AND INTERPLANETARY MAGNETIC FIELDS. IV. SOLAR CYCLE MODEL BASED ON ULYSSES OBSERVATIONS  

Science Conference Proceedings (OSTI)

The solar cycle has a profound influence on the solar wind (SW) interaction with the local interstellar medium (LISM) on more than one timescales. Also, there are substantial differences in individual solar cycle lengths and SW behavior within them. The presence of a slow SW belt, with a variable latitudinal extent changing within each solar cycle from rather small angles to 90 Degree-Sign , separated from the fast wind that originates at coronal holes substantially affects plasma in the inner heliosheath (IHS)-the SW region between the termination shock (TS) and the heliopause (HP). The solar cycle may be the reason why the complicated flow structure is observed in the IHS by Voyager 1. In this paper, we show that a substantial decrease in the SW ram pressure observed by Ulysses between the TS crossings by Voyager 1 and 2 contributes significantly to the difference in the heliocentric distances at which these crossings occurred. The Ulysses spacecraft is the source of valuable information about the three-dimensional and time-dependent properties of the SW. Its unique fast latitudinal scans of the SW regions make it possible to create a solar cycle model based on the spacecraft in situ measurements. On the basis of our analysis of the Ulysses data over the entire life of the mission, we generated time-dependent boundary conditions at 10 AU from the Sun and applied our MHD-neutral model to perform a numerical simulation of the SW-LISM interaction. We analyzed the global variations in the interaction pattern, the excursions of the TS and the HP, and the details of the plasma and magnetic field distributions in the IHS. Numerical results are compared with Voyager data as functions of time in the spacecraft frame. We discuss solar cycle effects which may be reasons for the recent decrease in the TS particles (ions accelerated to anomalous cosmic-ray energies) flux observed by Voyager 1.

Pogorelov, N. V.; Zank, G. P. [Department of Physics, University of Alabama in Huntsville, Huntsville, AL 35899 (United States); Suess, S. T. [National Space Science and Technology Center, Huntsville, AL 35805 (United States); Borovikov, S. N. [Center for Space Plasma and Aeronomic Research, University of Alabama in Huntsville, 320 Sparkman Dr., Huntsville, AL 35805 (United States); Ebert, R. W.; McComas, D. J., E-mail: np0002@uah.edu [Southwest Research Institute, San Antonio, TX 78227 (United States)

2013-07-20T23:59:59.000Z

166

The Relation of Near-Inertial Motions Observed in the Mixed layer During the JASIN (1978) Experiment to the Local Wind Stress and to the Quasi-Geostrophic Flow Field  

Science Conference Proceedings (OSTI)

Oscillations with near-inertial frequencies were an energetic component of the upper ocean velocity field observed at each of two moorings separated by 44 km during the Joint Air Sea INteraction (JASIN) experiment during the late summer of 1978. ...

Robert A. Weller

1982-10-01T23:59:59.000Z

167

3D Integral Field Observations of Ten Galactic Winds - I. Extended phase (>10 Myr) of mass/energy injection before the wind blows  

E-Print Network (OSTI)

We present 3D spectroscopic observations of a sample of 10 nearby galaxies with the AAOmega-SPIRAL integral field spectrograph on the 3.9m AAT, the largest survey of its kind to date. The double-beam spectrograph provides spatial maps in a range of spectral diagnostics: [OIII] 5007, H-beta, Mg-b, NaD, [OI] 6300, H-alpha, [NII] 6583, [SII] 6717, 6731. All of the objects in our survey show extensive wind-driven filamentation along the minor axis, in addition to large-scale disk rotation. Our sample can be divided into either starburst galaxies or active galactic nuclei (AGN), although some objects appear to be a combination of these. The total ionizing photon budget available to both classes of galaxies is sufficient to ionise all of the wind-blown filamentation out to large radius. We find however that while AGN photoionisation always dominates in the wind filaments, this is not the case in starburst galaxies where shock ionisation dominates. This clearly indicates that after the onset of star formation, there...

Sharp, R G

2010-01-01T23:59:59.000Z

168

Increased oil production and reserves from improved completion techniques in the Bluebell Field, Unita Basin, Utah. Quarterly technical progress report, January 1, 1995--March 31, 1995  

SciTech Connect

This project aspires to increase the productivity and reserves in the Uinta Basin by demonstration of improved completion techniques. Subsurface studies were performed this period.

Allison, M.L.

1995-04-07T23:59:59.000Z

169

Retrieval of Model Initial Fields from Single-Doppler Observations of a Supercell Thunderstorm. Part II: Thermodynamic Retrieval and Numerical Prediction  

Science Conference Proceedings (OSTI)

In this two-part study, a single-Doppler parameter retrieval technique is developed and applied to a real-data case to provide model initial conditions for a short-range prediction of a supercell thunderstorm. The technique consists of the ...

Stephen S. Weygandt; Alan Shapiro; Kelvin K. Droegemeier

2002-03-01T23:59:59.000Z

170

A Field Intercomparison Technique to Improve the Relative Accuracy of Longwave Radiation Measurements and an Evaluation of CASES-99 Pyrgeometer Data Quality  

Science Conference Proceedings (OSTI)

Techniques for improving the relative accuracy of longwave radiation measurements by a set of pyrgeometers [the Eppley Laboratory Precision Infrared Radiometer (Model PIR)] are presented using 10 PIRs from the 1999 Cooperative AtmosphereSurface ...

S. P. Burns; J. Sun; A. C. Delany; S. R. Semmer; S. P. Oncley; T. W. Horst

2003-03-01T23:59:59.000Z

171

Modeling Techniques | Open Energy Information  

Open Energy Info (EERE)

Modeling Techniques Modeling Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Modeling Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Data and Modeling Techniques Exploration Sub Group: Modeling Techniques Parent Exploration Technique: Data and Modeling Techniques Information Provided by Technique Lithology: Rock types, rock chemistry, stratigraphic layer organization Stratigraphic/Structural: Stress fields and magnitudes, location and shape of permeable and non-permeable structures, faults, fracture patterns Hydrological: Visualization and prediction of the flow patterns and characteristics of geothermal fluids, hydrothermal fluid flow characteristics, up-flow patterns

172

The Structure of Thermals in Cumulus from Airborne Dual-Doppler Radar Observations  

Science Conference Proceedings (OSTI)

A newly developed technique for airborne dual-Doppler observations with the Wyoming Cloud Radar is used to characterize the velocity fields in vertical planes across cumulus turrets. The clouds sampled were continental in nature, with high bases (...

Rick Damiani; Gabor Vali; Samuel Haimov

2006-05-01T23:59:59.000Z

173

Technique development for uiper critical field studies of SmFeAs(O,F) in the 300T single turn system  

SciTech Connect

In high temperature superconductors, such as the most recent class of iron pnictides, extremely high upper critical fields H{sub c2} are common. The determination of H{sub c2}(T) is crucial to understand the detailed nature of the superconductor, in particular H{sub c2}(T = 0K) is of great interest. It is not only related to fundamental properties of the system, it is furthermore of great importance for materials science, as it is the ultimate limit of applicability of this superconductor in high field applications. However, this important quantity can only be estimated by extrapolation, as H{sub c2}(T = 0K) well exceeds hundreds of Tesla in optimally doped SillFeAs(O,F). We are developing methods to measure Ha(T) in direct transport in the extreme magnetic fields generated by the LANL single turn magnet.

Mcdonald, Ross D [Los Alamos National Laboratory; Balakirev, F. F. [Los Alamos National Laboratory; Altarawneh, M. M. [Los Alamos National Laboratory; Betts, J [Los Alamos National Laboratory; Mielke, C. H. [Los Alamos National Laboratory; Moll, Philip Jw [ETH ZURICH; Zhigadlo, N D [ETH ZURICH; Karpinski, J [ETH ZURICH; Batlogg, B. [ETH ZURICH

2011-01-14T23:59:59.000Z

174

DETERMINATION OF THE HELIOSPHERIC RADIAL MAGNETIC FIELD FROM THE STANDOFF DISTANCE OF A CME-DRIVEN SHOCK OBSERVED BY THE STEREO SPACECRAFT  

SciTech Connect

We report on the determination of radial magnetic field strength in the heliocentric distance range from 6 to 120 solar radii (R {sub Sun }) using data from Coronagraph 2 (COR2) and Heliospheric Imager I (HI1) instruments on board the Solar Terrestrial Relations Observatory spacecraft following the standoff-distance method of Gopalswamy and Yashiro. We measured the shock standoff distance of the 2008 April 5 coronal mass ejection (CME) and determined the flux-rope curvature by fitting the three-dimensional shape of the CME using the Graduated Cylindrical Shell model. The radial magnetic field strength is computed from the Alfven speed and the density of the ambient medium. We also compare the derived magnetic field strength with in situ measurements made by the Helios spacecraft, which measured the magnetic field at the heliocentric distance range from 60 to 215 R {sub Sun }. We found that the radial magnetic field strength decreases from 28 mG at 6 R {sub Sun} to 0.17 mG at 120 R {sub Sun }. In addition, we found that the radial profile can be described by a power law.

Poomvises, Watanachak; Gopalswamy, Nat; Yashiro, Seiji; Kwon, Ryun-Young [NASA GSFC, Greenbelt, MD 20771 (United States); Olmedo, Oscar [Space Science Division, U.S. Naval Research Laboratory, Washington, DC 20375 (United States)

2012-10-20T23:59:59.000Z

175

Offshore underbalanced drilling system could revive field developments. Part 2: Making this valuable reservoir drilling/completion technique work on a conventional offshore drilling platform  

Science Conference Proceedings (OSTI)

Part 1, presented in the July issue, discussed the emerging trend to move underbalanced drilling (UBD) operations into the offshore arena, following its successful application in many onshore areas. This concluding article delves into the details of applying UBD offshore. Starting with advantages the technique offers in many maturing or complex/marginal prospects, the UBD system for offshore platforms use is described. This involves conversion of the conventional rotary system, use of rotating diverters, design of the surface fluid separation system and the necessary gas (nitrogen or natural gas) injection system to lighten the fluid column. Commonly faced operational challenges for offshore UBD are listed along with recommended solutions.

Nessa, D.O.; Tangedahl, M.J.; Saponja, J.

1997-10-01T23:59:59.000Z

176

Observation Wells | Open Energy Information  

Open Energy Info (EERE)

Observation Wells Observation Wells Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Observation Wells Details Activities (7) Areas (7) Regions (0) NEPA(15) Exploration Technique Information Exploration Group: Drilling Techniques Exploration Sub Group: Development Drilling Parent Exploration Technique: Development Drilling Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Total dissolved solids, fluid pressure, flow rates, and flow direction Thermal: Monitors temperature of circulating fluids Dictionary.png Observation Wells: An observation well is used to monitor important hydrologic parameters in a geothermal system that can indicate performance, longevity, and transient processes. Other definitions:Wikipedia Reegle

177

Noah-GEM and Land Data Assimilation System (LDAS) based downscaling of global reanalysis surface fields: Evaluations using observations from a CarboEurope agricultural site  

Science Conference Proceedings (OSTI)

This study provides the first assessment of the Noah and Noah-GEM (photosynthesis-based Gas exchange Evapotranspiration Model) land surface model using observations from the Avignon, France CarboEurope agricultural site during 2006 and 2007. Noah and ... Keywords: CarboEurope, Fluxnet, Land Data Assimilation System, Latent heat flux, Noah, Noah-GEM

Umarporn Charusombat; Dev Niyogi; SBastien Garrigues; Albert Olioso; Olivier Marloie; Michael Barlage; Fei Chen; Michael Ek; Xuemei Wang; Zhiyong Wu

2012-08-01T23:59:59.000Z

178

Inner shelf response to cross-shelf wind stress: the importance of the cross-shelf density gradient in an idealized numerical model and field observations  

Science Conference Proceedings (OSTI)

This study investigates the effects of horizontal and vertical density gradients on the inner shelf response to cross-shelf wind stress by using an idealized numerical model and observations from a moored array deployed south of Marthas Vineyard, ...

Rachel Horwitz; Steven J. Lentz

179

Synthesis of Remote Sensing and Field Observations to Model and Understand Disturbance and Climate Effects on the Carbon Balance of Oregon & Northern California  

SciTech Connect

The goal is to quantify and explain the carbon (C) budget for Oregon and N. California. The research compares "bottom -up" and "top-down" methods, and develops prototype analytical systems for regional analysis of the carbon balance that are potentially applicable to other continental regions, and that can be used to explore climate, disturbance and land-use effects on the carbon cycle. Objectives are: 1) Improve, test and apply a bottom up approach that synthesizes a spatially nested hierarchy of observations (multispectral remote sensing, inventories, flux and extensive sites), and the Biome-BGC model to quantify the C balance across the region; 2) Improve, test and apply a top down approach for regional and global C flux modeling that uses a model-data fusion scheme (MODIS products, AmeriFlux, atmospheric CO2 concentration network), and a boundary layer model to estimate net ecosystem production (NEP) across the region and partition it among GPP, R(a) and R(h). 3) Provide critical understanding of the controls on regional C balance (how NEP and carbon stocks are influenced by disturbance from fire and management, land use, and interannual climate variation). The key science questions are, "What are the magnitudes and distributions of C sources and sinks on seasonal to decadal time scales, and what processes are controlling their dynamics? What are regional spatial and temporal variations of C sources and sinks? What are the errors and uncertainties in the data products and results (i.e., in situ observations, remote sensing, models)?

Beverly Law; David Turner; Warren Cohen; Mathias Goeckede

2008-05-22T23:59:59.000Z

180

Diagnostics Techniques of Power Transformer  

Science Conference Proceedings (OSTI)

This paper provides the information on the diagnostics techniques for condition monitoring of power transformer (PT). This paper deals with the practical importance of the transformer diagnostic in the Electrical Engineering field. A review has been ... Keywords: temperature, condition monitoring, diagnostics methods, paper analysis techniques, oil analysis techniques

Piush Verma; Y. R. Sood; Jashandeep Singh

2009-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "field techniques observation" 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

Keck Deep Fields. I. Observations, Reductions, and the Selection of Faint Star-Forming Galaxies at Redshifts z~4, 3, and 2  

E-Print Network (OSTI)

We introduce a very deep, R_lim~27, multicolor imaging survey of very faint star-forming galaxies at z~4, z~3, z~2.2, and z~1.7. This survey, carried out on the Keck I telescope, uses the very same UGRI filter system that is employed by the Steidel team to select galaxies at these redshifts, and thus allows us to construct identically-selected, but much fainter, samples. However, our survey reaches ~1.5 mag deeper than the work of Steidel and his group, letting us probe substantially below the characteristic luminosity L* and thus study the properties and redshift evolution of the faint component of the high-z galaxy population. The survey covers 169 square arcminutes in three spatially independent patches on the sky and -- to R<~27 -- contains 427 GRI-selected z~4 LBGs, 1481 UGR-selected z~3 LBGs, 2417 UGR-selected z~2.2 star-forming galaxies, and 2043 UGR-selected z~1.7 star-forming galaxies. In this paper, the first in a series, we introduce the survey, describe our observing and data reduction strategies, and outline the selection of our z~4, z~3, z~2.2, and z~1.7 samples.

Marcin Sawicki; David Thompson

2005-07-19T23:59:59.000Z

182

ENTO 489 Field Entomology Field Project Plan  

E-Print Network (OSTI)

ENTO 489 ­ Field Entomology Field Project Plan GENERAL Title: A Taxonomic Survey of Late Summer will be using aerial sweep nets as our only technique to collect the butterflies because this is the best way: · Materials needed to implement the project in the field include: o 2 aerial sweep nets o 2-4 killing jars set

Behmer, Spencer T.

183

Magnetic Techniques | Open Energy Information  

Open Energy Info (EERE)

Magnetic Techniques Magnetic Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Magnetic Techniques Details Activities (0) Areas (0) Regions (0) NEPA(1) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Magnetic Techniques Parent Exploration Technique: Geophysical Techniques Information Provided by Technique Lithology: Presence of magnetic minerals such as magnetite. Stratigraphic/Structural: Mapping of basement structures, horst blocks, fault systems, fracture zones, dykes and intrusions. Hydrological: The circulation of hydrothermal fluid may impact the magnetic susceptibility of rocks. Thermal: Rocks lose their magnetic properties at the Curie temperature (580° C for magnetite) [1] and, upon cooling, remagnetize in the present magnetic field orientation. The Curie point depth in the subsurface may be determined in a magnetic survey to provide information about hydrothermal activity in a region.

184

Reported Significant Observation (RSO) studies. Revision 1  

SciTech Connect

The Reported Significant Observation (RSO) study used in the field of safety is an information-gathering technique where employee-participants describe situations they have personally witnessed involving good and bad practices and safe and unsafe conditions. This information is useful in the risk assessment process because it focuses on hazards and thereby facilitates their elimination. However, RSO cannot be the only component in a risk assessment program. Used by the Air Force in their aviation psychology program and further developed by John C. Flanagan, RSO is more commonly known as the ``Critical Incident Technique.`` However, the words ``Critical`` and ``Incident`` had other connotations in nuclear safety, prompting early users within the Aerojet Nuclear Company to coin the more fitting title of ``Reported Significant Observations.`` The technique spread slowly in the safety field primarily because the majority of users were researchers interested in after-the-fact data, with application to everyday problems and behavioral factors. RSO was formally recognized as a significant hazard reduction tool during the development of the Management Oversight and Risk Tree (MORT) program for the US Atomic Energy Commission. The Department of Energy (DOE) has, in turn, adopted MORT for its system safety program, and this has resulted in RSO being a modern and viable technique for DOE contractor safety programs.

Eicher, R.W.

1992-12-01T23:59:59.000Z

185

Phase Field, CALPHAD and Other Modeling Techniques  

Science Conference Proceedings (OSTI)

Feb 17, 2010... Morphological Patterns in Alloy Surfaces: Bharathi Srinivasan1; Ramanarayan Hariharaputran1; 1Institute of High Performance Computing

186

An Interactive Method for Processing and Display of Sea-Surface Temperature Fields Using VAS Multispectral Data  

Science Conference Proceedings (OSTI)

A technique for interactively producing sea-surface temperatures (SST)from VAS multispectral radiance observations and displaying the derived field is outlined. High-resolution composite images using data from several times per day and over a ...

John J. Bates; William L. Smith; Gary S. Wade; Harold M. Woo1f

1987-06-01T23:59:59.000Z

187

The THORPEX Observation Impact Intercomparison Experiment  

Science Conference Proceedings (OSTI)

An experiment is being conducted to directly compare the impact of all assimilated observations on short-range forecast errors in different forecast systems using an adjoint-based technique. The technique allows detailed comparison of observation ...

Ronald Gelaro; Rolf H. Langland; Simon Pellerin; Ricardo Todling

2010-11-01T23:59:59.000Z

188

Make Observations  

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

and public perceptions and preferences, help improve our understanding of risk, vulnerability, resilience, and adaptive capacity. How does USGCRP make observations? USGCRP...

189

Observations - CECM  

E-Print Network (OSTI)

May 10, 1999 ... A broad range of observations were made, culled from the various sources mentioned. Those bearing directly on the participatory process are...

190

Data and Modeling Techniques | Open Energy Information  

Open Energy Info (EERE)

and Modeling Techniques and Modeling Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Data and Modeling Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Data and Modeling Techniques Exploration Sub Group: None Parent Exploration Technique: Exploration Techniques Information Provided by Technique Lithology: Rock types, rock chemistry, stratigraphic layer organization Stratigraphic/Structural: Stress fields and magnitudes, location and shape of permeable and non-permeable structures, faults, and fracture patterns Hydrological: Visualization and prediction of the flow patterns and characteristics of geothermal fluids, hydrothermal fluid flow characteristics, up-flow patterns

191

Experimental Techniques for Measuring Temperature and Velocity...  

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

Measuring Temperature and Velocity Fields to Improve the Use and Validation of Building Heat Transfer Models Title Experimental Techniques for Measuring Temperature and Velocity...

192

Field Sampling | Open Energy Information  

Open Energy Info (EERE)

form form View source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon » Field Sampling Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Field Sampling Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Field Techniques Exploration Sub Group: Field Sampling Parent Exploration Technique: Field Techniques Information Provided by Technique Lithology: Rock samples are used to define lithology. Field and lab analyses can be used to measure the chemical and isotopic constituents of rock samples. Stratigraphic/Structural: Can reveal relatively high permeability zones. Provides information about the time and environment which formed a particular geologic unit. Microscopic rock textures can be used to estimate the history of stress and strain, and/or faulting.

193

ARM - Publications: Science Team Meeting Documents: A Bootstrap Technique  

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

A Bootstrap Technique for Testing the Relationship between Local-Scale A Bootstrap Technique for Testing the Relationship between Local-Scale Radar Observations of Cloud Occurrence and Large-Scale Atmospheric Fields Marchand, Roger Pacific Northwest National Laboratory Beagley, Nathaniel Pacific Northwest National Laboratory Ackerman, Thomas DOE/Pacific Northwest National Laboratory Limitations in the ability of Global Climate Models (GCMs) to predict clouds create significant uncertainties in predicting and understanding climate. Comparison studies have demonstrated that clouds are among the largest source of uncertainty in global climate model simulations [Cess et al., 1990; Potter and Cess, 2003]. Comparisons of model output and observational data generally require averaging (or aggregating) the observations in an attempt to put them on the same large spatial scale as

194

Application of the Knox-Thompson method to solar observations  

Science Conference Proceedings (OSTI)

The Knox-Thompson (KT) technique is well suited for speckle imaging of an extended source, such as the sun. Other techniques require that the extent of the observed object is restricted to the field size (e.g., the Fienup technique) or even to much less than the seeing disk size (e.g., shift-and-add). The Knox-Thompson technique, as well as the speckle-masking technique, are more general in that they make no assumptions about the object size. Because of its relative simplicity, the KT technique has been applied to solar data. A KT speckle-imaging program has been dedicated to solar data analysis. The program, named KISIP, now runs on the NSO/Sacramento Peak VAX 750 under 4.3 BSD UNIX. Major features of the code are: combination of the Labeyrie (1970, for Fourier-amplitude recovery) - and Knox-Thompson (phase recovery) techniques; incorporation of the spectral-ratio technique to correct Fourier amplitudes for seeing attenuation; and incorporation of a phase consistency test to estimate the accuracy to which phases can be reconstructed from Knox-Thompson bispectra.

Luhe, O.V.D.

1987-01-01T23:59:59.000Z

195

Radiosonde observations at Pt. Reyes and cloud properties retrieved from  

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

Radiosonde observations at Pt. Reyes and cloud properties retrieved from Radiosonde observations at Pt. Reyes and cloud properties retrieved from GOES-WEST Inoue, Toshiro MRI/JMA Category: Field Campaigns Low-level cloud formed off the west coast of continents plays an important role in general circulation and climate. Marine Stratus Radiation Aerosol and Drizzle (MASRAD) was conducted at the ARM mobile site deployed at Pt Reyes, California during April to September. Here, we studied the relationship between meteorological parameters observed by GPS sonde and cloud properties observed from GOES-WEST during the MASRAD intensive operational period. Cloud properties are retrieved from VISST (Visible Infrared Solar-infrared Split window Technique). The vertical profile of stability, relative humidity (RH) and wind speed observed by GPS sonde are

196

Observations and Simulations of Fibrils and Mottles  

E-Print Network (OSTI)

With the recent advent of the Swedish 1-m Solar Telescope (SST), advanced image processing techniques, as well as numerical simulations that provide a more realistic view of the chromosphere, a comprehensive understanding of chromospheric jets such as spicules, mottles and fibrils is now within reach. In this paper, we briefly summarize results from a recent analysis of dynamic fibrils, short-lived jet-like features that dominate the chromosphere (as imaged in H-alpha) above and about active region plage. Using extremely high-resolution observations obtained at the SST, and advanced numerical 2D radiative MHD simulations, we show that fibrils are most likely formed by chromospheric shock waves that occur when convective flows and global oscillations leak into the chromosphere along the field lines of magnetic flux concentrations. In addition, we present some preliminary observations of quiet Sun jets or mottles. We find that the mechanism that produces fibrils in active regions is most likely also at work in quiet Sun regions, although it is modified by the weaker magnetic field and the presence of more mixed-polarity. A comparison with numerical simulations suggests that the weaker magnetic field in quiet Sun allows for significantly stronger (than in active regions) transverse motions that are superposed on the field-aligned, shock-driven motions. This leads to a more dynamic, and much more complex environment than in active region plage. In addition, our observations of the mixed polarity environment in quiet Sun regions suggest that other mechanisms, such as reconnection, may well play a significant role in the formation of some quiet Sun jets.

Bart De Pontieu; Viggo H. Hansteen; Luc Rouppe van der Voort; Michiel van Noort; Mats Carlsson

2007-02-02T23:59:59.000Z

197

Designating required vs. optional input fields  

Science Conference Proceedings (OSTI)

This paper describes a study comparing different techniques for visually distingishing required from optional input fields in a form-filling application. Seven techniques were studied: no indication, bold field labels, chevrons in front of the labels, ... Keywords: data input, optional fields, required fields, visual design

Thomas S. Tullis; Ana Pons

1997-03-01T23:59:59.000Z

198

Category:Exploration Techniques | Open Energy Information  

Open Energy Info (EERE)

Techniques Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Geothermal Exploration page? For detailed information on Geothermal Exploration, click here. Category:Exploration Techniques Add.png Add a new Exploration Technique Subcategories This category has the following 9 subcategories, out of 9 total. D [+] Data and Modeling Techniques‎ (2 categories) 2 pages [+] Downhole Techniques‎ (5 categories) 10 pages [+] Drilling Techniques‎ (2 categories) 4 pages F [+] Field Methods‎ (1 categories) [+] Field Techniques‎ (2 categories) 4 pages G [+] Geochemical Techniques‎ (1 categories) 1 pages G cont. [+] Geophysical Techniques‎ (4 categories) 5 pages L [+] Lab Analysis Techniques‎ (2 categories) 4 pages R [+] Remote Sensing Techniques‎ (2 categories) 2 pages

199

A Review of Spatial Statistical Techniques for Location Studies  

E-Print Network (OSTI)

While the new economic geography of trade and location has, understandably enough, concentrated on developing models of stylised relationships, it now seems that a review of some techniques which may be applied in empirical testing could prove useful. It is this task that will be approached here, conditioned by the advances taking place in new economic geography on the one hand, and in spatial data analysis on the other. Spatial data analysis ranges from the visualization and exploration of spatial data, through spatial statistics to spatial econometrics. The techniques involved are intended to explore for and demonstrate the presence of dependence between observations in space. Typically, observations are classified into three broad types: fields or surfaces with values at least theoretically observable over the whole study area, as in geostatistics, point patterns representing the occurrence of an observation, such as reported cases in epidemiology, and finally lattice observations, where attribute values adhere to a tesselation of the study area. This last form has much in common with time series studies, and shares a number of key testing techniques with econometrics. The paper reviews chosen techniques which can be applied in new economic geography. Point patterns, for instance, can be readily used to attempt to detect clustering. Lattice observations are used in the study of dynamic externalities, and consequently the effects of testing hypotheses based on spatial series should be examined. Finally, attention will be drawn to problems arising from spatial non-stationarity, when causal relationships may vary across space, and from the modifiable areal unit problem, when test results are influenced by the choice of spatial aggregation employed. 1

Roger Bivand

1998-01-01T23:59:59.000Z

200

Field Mapping | Open Energy Information  

Open Energy Info (EERE)

Field Mapping Field Mapping Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Field Mapping Details Activities (59) Areas (35) Regions (6) NEPA(0) Exploration Technique Information Exploration Group: Field Techniques Exploration Sub Group: Data Collection and Mapping Parent Exploration Technique: Data Collection and Mapping Information Provided by Technique Lithology: Map surface geology and hydrothermal alteration. Stratigraphic/Structural: Map fault and fracture patterns, kinematic information. Hydrological: Map surface manifestations of geothermal systems. Thermal: Map surface temperature. Cost Information Low-End Estimate (USD): 400.0040,000 centUSD 0.4 kUSD 4.0e-4 MUSD 4.0e-7 TUSD / hour Median Estimate (USD): 600.0060,000 centUSD

Note: This page contains sample records for the topic "field techniques observation" 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

Particle Formation and Growth in Power Plant Plumes, Volume 1: Field Observations and Theoretical Studies of the Evolution of Partic les in the Plumes from Coal-Fired Electric Power Plants  

Science Conference Proceedings (OSTI)

Volume 1 of this report describes parallel field and theoretical studies of particle-size distributions in the plumes of coal-fired power plants.Volume 2 presents measurements of concentration of particulate sulfur, sulfate, nitrate, total particulate volume.Aitken nuclei, and various trace gases in the plumes of six coal-fired power plants.

1983-05-01T23:59:59.000Z

202

Observations of a Mesoscale Ducted Gravity Wave  

Science Conference Proceedings (OSTI)

This paper reports coordinated observations of a mesoscale gravity wave made during the FRONTS 84 field experiment conducted in southwestern France in the summer of 1984. The observations were unique in the sense that all relevant wave ...

F. M. Ralph; V. Venkateswaran; M. Crochet

1993-10-01T23:59:59.000Z

203

Revitalizing an old oil field  

Science Conference Proceedings (OSTI)

Redevelopment of the Olney oil field in Illinois is described. First discovered in 1936, production peaked in 1941 when over 30,000 bopd were produced. In 1970, 600 wells in the Olney field pumped only 4000 bpd. Since the decontrol of crude oil prices, a redevelopment project has begun in the field. The project includes well stimulation techniques plus newly drilled or deepened wells. Present production in the Olney field has reached 5000 bopd.

Ortiz, S.

1981-12-01T23:59:59.000Z

204

Geothermal/Well Field | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Geothermal/Well Field < Geothermal(Redirected from Well Field) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Land Use Leasing Exploration Well Field Power Plant Transmission Environment Water Use Print PDF Geothermal Well Fields and Reservoirs General Techniques Tree Techniques Table Regulatory Roadmap NEPA (45) Geothermal energy plant at The Geysers near Santa Rosa in Northern California, the world's largest electricity-generating hydrothermal geothermal development. Copyright © 1995 Warren Gretz Geothermal Well Fields discussion Groups of Well Field Techniques

205

Ultra High-Energy Cosmic Ray Observations  

E-Print Network (OSTI)

The year 2007 has furnished us with outstanding results about the origin of the most energetic cosmic rays: a flux suppression as expected from the GZK-effect has been observed in the data of the HiRes and Auger experiments and correlations between the positions of nearby AGN and the arrival directions of trans-GZK events have been observed by the Pierre Auger Observatory. The latter finding marks the beginning of ultra high-energy cosmic ray astronomy and is considered a major breakthrough starting to shed first light onto the sources of the most extreme particles in nature. This report summarizes those observations and includes other major advances of the field, mostly presented at the 30th International Cosmic Ray Conference held in Merida, Mexico, in July 2007. With increasing statistics becoming available from current and even terminated experiments, systematic differences amongst different experiments and techniques can be studied in detail which is hoped to improve our understanding of experimental tec...

Kampert, Karl-Heinz

2008-01-01T23:59:59.000Z

206

A Proposed Technique for Diagnosis by Radar of Hurricane Structure  

Science Conference Proceedings (OSTI)

A Doppler radar technique is proposed for remote estimation of hurricane structure by sampling the kinematic properties of the hurricane wind field in a relatively small circular area outside the radius of maximum winds. This technique uses ...

Ralph J. Donaldson Jr.

1991-12-01T23:59:59.000Z

207

Ground Gravity Survey At San Francisco Volcanic Field Area (Warpinski...  

Open Energy Info (EERE)

Ground Gravity Survey At San Francisco Volcanic Field Area (Warpinski, Et Al., 2004) Exploration Activity Details Location San Francisco Volcanic Field Area Exploration Technique...

208

Reflection Survey At Dixie Valley Geothermal Field Area (Blackwell...  

Open Energy Info (EERE)

Reflection Survey At Dixie Valley Geothermal Field Area (Blackwell, Et Al., 2009) Exploration Activity Details Location Dixie Valley Geothermal Field Area Exploration Technique...

209

Reflection Survey At Dixie Valley Geothermal Field Area (Blackwell...  

Open Energy Info (EERE)

Reflection Survey At Dixie Valley Geothermal Field Area (Blackwell, Et Al., 2003) Exploration Activity Details Location Dixie Valley Geothermal Field Area Exploration Technique...

210

Field Mapping At Colrado Area (DOE GTP) | Open Energy Information  

Open Energy Info (EERE)

Field Mapping At Colrado Area (DOE GTP) Exploration Activity Details Location Colado Geothermal Area Exploration Technique Field Mapping Activity Date Usefulness not indicated...

211

USE OF ADVANCED DATA PROCESSING TECHNIQUES IN THE IMAGING OF...  

Open Energy Info (EERE)

USE OF ADVANCED DATA PROCESSING TECHNIQUES IN THE IMAGING OF THE COSO GEOTHERMAL FIELD Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: USE OF...

212

Geothermal/Well Field | Open Energy Information  

Open Energy Info (EERE)

Geothermal/Well Field Geothermal/Well Field < Geothermal Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Land Use Leasing Exploration Well Field Power Plant Transmission Environment Water Use Print PDF Geothermal Well Fields and Reservoirs General Techniques Tree Techniques Table Regulatory Roadmap NEPA (42) Geothermal energy plant at The Geysers near Santa Rosa in Northern California, the world's largest electricity-generating hydrothermal geothermal development. Copyright © 1995 Warren Gretz Geothermal Well Fields discussion Groups of Well Field Techniques There are many different techniques that are utilized in geothermal well field development and reservoir maintenance depending on the region's geology, economic considerations, project maturity, and other considerations such as land access and permitting requirements. Well field

213

Electric Field Reversal in Sprite Electric Field Signature  

Science Conference Proceedings (OSTI)

In measurements of the electric field associated with the current of a sprite 450 km from ground-based field sensors, it was observed that the sign of the electric field was positive when positive charge was lowered from the ionosphere. A recent ...

Richard G. Sonnenfeld; William W. Hager

2013-05-01T23:59:59.000Z

214

Electromagnetic field of a charge intersecting a cold plasma boundary in a waveguide  

SciTech Connect

We analyze the electromagnetic field of a charge crossing a boundary between a vacuum and cold plasma in a waveguide. We obtain exact expressions for the field components and the spectral density of the transition radiation. With the steepest descent technique, we investigate the field components. We show that the electromagnetic field has a different structure in a vacuum than in cold plasma. We also develop an algorithm for the computation of the field based on a certain transformation of the integration path. The behavior of the field depending on distance and time and the spectral density depending on frequency are explored for different charge velocities. Some important physical effects are noted. A considerable increase and concentration of the field near the wave front in the plasma is observed for the case of ultrarelativistic particles. In the plasma, the mode envelopes and spectral density show zero points when the charge velocity is within certain limits.

Alekhina, Tatiana Yu.; Tyukhtin, Andrey V. [Radiophysics Department of St. Petersburg University, 1 Ulyanovskaya, St. Petersburg 198504 (Russian Federation)

2011-06-15T23:59:59.000Z

215

FULLY RESOLVED QUIET-SUN MAGNETIC FLUX TUBE OBSERVED WITH THE SUNRISE/IMAX INSTRUMENT  

SciTech Connect

Until today, the small size of magnetic elements in quiet-Sun areas has required the application of indirect methods, such as the line-ratio technique or multi-component inversions, to infer their physical properties. A consistent match to the observed Stokes profiles could only be obtained by introducing a magnetic filling factor that specifies the fraction of the observed pixel filled with magnetic field. Here, we investigate the properties of a small magnetic patch in the quiet Sun observed with the IMaX magnetograph on board the balloon-borne telescope SUNRISE with unprecedented spatial resolution and low instrumental stray light. We apply an inversion technique based on the numerical solution of the radiative transfer equation to retrieve the temperature stratification and the field strength in the magnetic patch. The observations can be well reproduced with a one-component, fully magnetized atmosphere with a field strength exceeding 1 kG and a significantly enhanced temperature in the mid to upper photosphere with respect to its surroundings, consistent with semi-empirical flux tube models for plage regions. We therefore conclude that, within the framework of a simple atmospheric model, the IMaX measurements resolve the observed quiet-Sun flux tube.

Lagg, A.; Solanki, S. K.; Riethmueller, T. L.; Schuessler, M.; Hirzberger, J.; Feller, A.; Borrero, J. M.; Barthol, P.; Gandorfer, A. [Max-Planck-Institut fuer Sonnensystemforschung, Max-Planck-Strasse 2, 37191 Katlenburg-Lindau (Germany); MartInez Pillet, V.; Bonet, J. A. [Instituto de Astrofisica de Canarias, C/Via Lactea s/n, 38200 La Laguna, Tenerife (Spain); Schmidt, W.; Berkefeld, T. [Kiepenheuer-Institut fuer Sonnenphysik, Schoeneckstrasse 6, 79104 Freiburg (Germany); Del Toro Iniesta, J. C. [Instituto de Astrofisica de AndalucIa (CSIC), Apartado de Correos 3004, 18080 Granada (Spain); Domingo, V. [Grupo de AstronomIa y Ciencias del Espacio, Universidad de Valencia, 46980 Paterna, Valencia (Spain); Knoelker, M. [High Altitude Observatory, National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307-3000 (United States); Title, A. M., E-mail: lagg@mps.mpg.d [Lockheed Martin Solar and Astrophysics Laboratory, Bldg. 252, 3251 Hanover Street, Palo Alto, CA 94304 (United States)

2010-11-10T23:59:59.000Z

216

Electron Based Techniques  

Science Conference Proceedings (OSTI)

Mar 5, 2013 ... Characterization of Materials through High Resolution Coherent Imaging: Electron Based Techniques Sponsored by: TMS Structural Materials...

217

Milling Techniques - TMS  

Science Conference Proceedings (OSTI)

February 4-8 1996 TMS ANNUAL MEETING Anaheim, California. SYNTHESIS AND PROCESSING OF NANOCRYSTALLINE POWDER III: Milling Techniques...

218

Electromagnetic polarizabilities: Lattice QCD in background fields  

Science Conference Proceedings (OSTI)

Chiral perturbation theory makes definitive predictions for the extrinsic behavior of hadrons in external electric and magnetic fields. Near the chiral limit, the electric and magnetic polarizabilities of pions, kaons, and nucleons are determined in terms of a few well-known parameters. In this limit, hadrons become quantum mechanically diffuse as polarizabilities scale with the inverse square-root of the quark mass. In some cases, however, such predictions from chiral perturbation theory have not compared well with experimental data. Ultimately we must turn to first principles numerical simulations of QCD to determine properties of hadrons, and confront the predictions of chiral perturbation theory. To address the electromagnetic polarizabilities, we utilize the background field technique. Restricting our attention to calculations in background electric fields, we demonstrate new techniques to determine electric polarizabilities and baryon magnetic moments for both charged and neutral states. As we can study the quark mass dependence of observables with lattice QCD, the lattice will provide a crucial test of our understanding of low-energy QCD, which will be timely in light of ongoing experiments, such as at COMPASS and HI gamma S.

W. Detmold, B.C. Tiburzi, A. Walker-Loud

2012-04-01T23:59:59.000Z

219

Estimation of Convective Rainfall from Lightning Observations  

Science Conference Proceedings (OSTI)

The objective of this study is to develop a technique to use lightning observations for estimating convective rainfall. A framework for rainfall estimation is developed in which key elements are 1) the rainfalllightning ratio, that is, the ...

Alberto Tapia; James A. Smith; Michael Dixon

1998-11-01T23:59:59.000Z

220

Definition: Electromagnetic Techniques | Open Energy Information  

Open Energy Info (EERE)

Electromagnetic Techniques Electromagnetic Techniques The objective of electromagnetic (EM) techniques is to image the electrical resistivity structure of the subsurface through the measurement of naturally- or artificially-generated electromagnetic fields.[1] View on Wikipedia Wikipedia Definition The electromagnetic force is one of the four fundamental interactions in nature, the other three being the strong interaction, the weak interaction, and gravitation. This force is described by electromagnetic fields, and has innumerable physical instances including the interaction of electrically charged particles and the interaction of uncharged magnetic force fields with electrical conductors. The word electromagnetism is a compound form of two Greek terms, ἢλεκτρον, ēlektron, "amber", and μαγνήτης, magnētēs, "magnet". The science

Note: This page contains sample records for the topic "field techniques observation" 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

Precise shape analysis using field sensitivity  

Science Conference Proceedings (OSTI)

We present a static shape analysis technique to infer the shapes of the heap structures created by a program at run time. Our technique is field sensitive in that it uses field information to compute the shapes. The shapes of the heap structures are ... Keywords: Compilers, Dataflow analysis, Heap analysis, Shape analysis, Static analysis

Sandeep Dasgupta, Amey Karkare, Vinay Kr Reddy

2013-06-01T23:59:59.000Z

222

Category:Field Sampling | Open Energy Information  

Open Energy Info (EERE)

Category Category Edit History Facebook icon Twitter icon » Category:Field Sampling Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Field Sampling page? For detailed information on Field Sampling as exploration techniques, click here. Category:Field Sampling Add.png Add a new Field Sampling Technique Subcategories This category has the following 2 subcategories, out of 2 total. G [×] Gas Sampling‎ 3 pages W [×] Water Sampling‎ 2 pages Pages in category "Field Sampling" The following 4 pages are in this category, out of 4 total. G Gas Sampling R Rock Sampling S Soil Sampling W Water Sampling Retrieved from "http://en.openei.org/w/index.php?title=Category:Field_Sampling&oldid=689818" Category: Field Techniques

223

Definition: Magnetotelluric Techniques | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Magnetotelluric Techniques Jump to: navigation, search Dictionary.png Magnetotelluric Techniques Magnetotellurics is an electromagnetic geophysical method used to image the electrical resistivity structure of the subsurface through the measurement of electrical and magnetic fields at the earth's surface.[1] View on Wikipedia Wikipedia Definition Magnetotellurics (MT) is an electromagnetic geophysical method of imaging the earth's subsurface by measuring natural variations of electrical and magnetic fields at the Earth's surface. Investigation depth ranges from 300m below ground by recording higher frequencies down to 10,000m or deeper with long-period soundings. Developed in Russia and

224

Applied Science/Techniques  

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

Applied Science/Techniques Applied Science/Techniques Applied Science/Techniques Print The ALS is an excellent incubator of new scientific techniques and instrumentation. Many of the technical advances that make the ALS a world-class soft x-ray facility are developed at the ALS itself. The optical components in use at the ALS-mirrors and lenses optimized for x-ray wavelengths-require incredibly high-precision surfaces and patterns (often formed through extreme ultraviolet lithography at the ALS) and must undergo rigorous calibration and testing provided by beamlines and equipment from the ALS's Optical Metrology Lab and Berkeley Lab's Center for X-Ray Optics. New and/or continuously improved experimental techniques are also a crucial element of a thriving scientific facility. At the ALS, examples of such "technique" highlights include developments in lensless imaging, soft x-ray tomography, high-throughput protein analysis, and high-power coherent terahertz radiation.

225

Imaging vector fields using Line Integral Convolution  

SciTech Connect

Imaging vector fields has applications in science, art, image processing and special effects. An effective new approach is to use linear and curvilinear filtering techniques to locally blur textures along a vector field. This approach builds on several previous texture generation and filtering techniques. It is, however, unique because it is local, one-dimensional and independent of any predefined geometry or texture. The technique is general and capable of imaging arbitrary two- and three-dimensional vector fields. The local one-dimensional nature of the algorithm lends itself to highly parallel and efficient implementations. Furthermore, the curvilinear filter is capable of rendering detail on very intricate vector fields. Combining this technique with other rendering and image processing techniques -- like periodic motion filtering -- results in richly informative and striking images. The technique can also produce novel special effects.

Cabral, B.; Leedom, L.C.

1993-03-01T23:59:59.000Z

226

Multicolor Underwater Imaging Techniques.  

E-Print Network (OSTI)

??Studies were conducted on multispectral polarimetric subtraction imaging techniques for underwater imaging that use a broadband light source. The main objective of this study was (more)

Waggoner, Douglas Scott

2007-01-01T23:59:59.000Z

227

Light Field Appearance Manifolds  

E-Print Network (OSTI)

Abstract. Statistical shape and texture appearance models are powerful image representations, but previously had been restricted to 2D or 3D shapes with smooth surfaces and lambertian reflectance. In this paper we present a novel 3D appearance model using image-based rendering techniques, which can represent complex lighting conditions, structures, and surfaces. We construct a light field manifold capturing the multi-view appearance of an object class and extend the direct search algorithm of Cootes and Taylor to match new light fields or 2D images of an object to a point on this manifold. When matching to a 2D image the reconstructed light field can be used to render unseen views of the object. Our technique differs from previous view-based active appearance models in that model coefficients between views are explicitly linked, and that we do not model any pose variation within the shape model at a single view. It overcomes the limitations of polygonal based appearance models and uses light fields that are acquired in real-time. 1

Chris Mario Christoudias; Trevor Darrell

2004-01-01T23:59:59.000Z

228

Risk assessment technique for evaluating research laboratories  

SciTech Connect

A technique has been developed to evaluate research laboratories according to risk, where risk is defined as the product of frequency and consequence. This technique was used to evaluate several laboratories at the Idaho National Engineering Laboratory under the direction of the Department of Energy, Idaho Field Office to assist in the risk management of the Science and Technology Department laboratories. With this technique, laboratories can be compared according to risk, and management can use the results to make cost effective decisions associated with the operation of the facility.

Bolander, T.W.; Meale, B.M.; Eide, S.A.

1992-01-01T23:59:59.000Z

229

Risk assessment technique for evaluating research laboratories  

SciTech Connect

A technique has been developed to evaluate research laboratories according to risk, where risk is defined as the product of frequency and consequence. This technique was used to evaluate several laboratories at the Idaho National Engineering Laboratory under the direction of the Department of Energy, Idaho Field Office to assist in the risk management of the Science and Technology Department laboratories. With this technique, laboratories can be compared according to risk, and management can use the results to make cost effective decisions associated with the operation of the facility.

Bolander, T.W.; Meale, B.M.; Eide, S.A.

1992-09-01T23:59:59.000Z

230

Superhydrophobic Materials Technology-PVC Bonding Techniques  

SciTech Connect

The purpose of the technology maturation project was to develop an enhanced application technique for applying diatomaceous earth with pinned polysiloxane oil to PVC pipes and materials. The oil infiltration technique is applied as a spray of diluted oil in a solvent onto the superhydrophobic diatomaceous earth substrate. This makes the surface take on the following characteristics: wet?cleanable anti?biofouling waterproof anti?corrosion. The project involved obtaining input and supplies from VeloxFlow and the development of successful techniques that would quickly result in a commercial license agreement with VeloxFlow and other companies that use PVC materials in a variety of other fields of use.

Hunter, Scott R. [Oak Ridge National Laboratory; Efird, Marty [VeloxFlow, LLC

2013-05-03T23:59:59.000Z

231

Principal Component Analysis of Wind Profiler Observations  

Science Conference Proceedings (OSTI)

Principal component analysis (PCA) is applied to wind profiler observations to study the vertical profile of the wind field and its temporal evolution. The rationale for decomposing timeheight wind profiler data using PCA is twofold. The ...

Christopher R. Williams

1997-06-01T23:59:59.000Z

232

Surface Temperature Observations from AVHRR in FIFE  

Science Conference Proceedings (OSTI)

Observations of the surface radiometric temperature by the AVHRR sensor on board the NOAA-9 satellite during the First ISLSCP (International Satellite Land Surface Climatology Project) Field Experiment conducted in central Kansas during 1987 are ...

T. J. Schmugge; G. M. Schmidt

1998-04-01T23:59:59.000Z

233

Data Techniques | Open Energy Information  

Open Energy Info (EERE)

Techniques Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Data Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Data and Modeling Techniques Exploration Sub Group: Data Techniques Parent Exploration Technique: Data and Modeling Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Dictionary.png Data Techniques: The collection, processing, and interpretation of data from various methods so accurate interpretations can be made about the subject matter. Other definitions:Wikipedia Reegle Introduction Data techniques are any technique where data is collected and organized in a manner so that the information is useful for geothermal purposes. The

234

Error Field Measurement Techniques for ITER Using Plasma Response  

E-Print Network (OSTI)

Bull. Am. Phys. Soc. 55, 375 (2010)52nd American Physical Society Annual Meeting of Division of Plasma Physics Chicago Illinois, US, 2010999618575

Strait, E.J.

2010-08-24T23:59:59.000Z

235

New application of existing techniques in old fields helps ...  

U.S. Energy Information Administration (EIA)

Short-Term Energy Outlook Annual Energy Outlook Energy Disruptions International ... (bbl/d ) of liquids ... TNK-BP now plans to expand the ...

236

Techniques and Technologies for Field Detection of Asbestos Containing Materials  

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

Asbestos has been used in numerous applications at DOE sites including sprayed-on fireproofing, asphalt and vinyl floor tile, and asbestos-cement(transite) siding.

237

Applications of Grid techniques in the CFD field  

E-Print Network (OSTI)

up fundermental CFD study in fluid dynamics, for example, mechanism of turbulence. (2) Grid resources 1 can also be used to solve large numbers of small tasks. By modifying one or some parameters like Mach number, angle of attach, iteration steps, CFD... Server MyProxy Server Computing Resources Cambridge CFD Web Portal (CamCFDWP) Fig. 6 Architecture of Cambridge CFD Web Por- tal (CamCFDWP) A successful login window shown in Fig.7. Once the 5 user logs in, it is time for him to submit jobs to remote...

Yang, Xiaobo; Hayes, Mark

2008-06-26T23:59:59.000Z

238

New application of existing techniques in old fields helps Russia ...  

U.S. Energy Information Administration (EIA)

Petroleum & Other Liquids. Crude oil, gasoline, heating oil, diesel, propane, and other liquids including biofuels and natural gas liquids. Natural Gas

239

Statistical Field Significance and its Determination by Monte Carlo Techniques  

Science Conference Proceedings (OSTI)

The effects of number and interdependence in evaluating the collective significance of finite sets of statistics are frequently non-trivial, especially for spatial networks of time-averaged meteorological data. These effects can be taken into ...

Robert E. Livezey; W. Y. Chen

1983-01-01T23:59:59.000Z

240

Definition: Lab Analysis Techniques | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Lab Analysis Techniques Jump to: navigation, search Dictionary.png Lab Analysis Techniques Lab Analysis Techniques encompass a broad array of analytical methods that can be used to characterize the chemical and physical properties of rock and fluid samples. The reliability of laboratory analyses depends strongly on both adherence to standard sampling procedures in the field when collecting materials for examination and on the application of appropriate sample preparation techniques in the lab. Ret Like Like You like this.Sign Up to see what your friends like. rieved from "http://en.openei.org/w/index.php?title=Definition:Lab_Analysis_Techniques&oldid=688298" Category:

Note: This page contains sample records for the topic "field techniques observation" 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

Live pathogens: rapid detection technique developed  

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

January » January » Live Pathogens: Rapid Detection Technique Developed Live pathogens: rapid detection technique developed The technique relies on bacteria being critically dependent upon the key nutrient iron. January 24, 2013 Colorized scanning electron micrograph of E. coli. Colorized scanning electron micrograph of E. coli. Photo credit: US Centers for Disease Control and Prevention LANL's new method eliminates the need for laboratory culture and greatly speeds the process. Los Alamos researchers have developed a better technique for quick detection of live pathogens in the field. Identification of viable bacteria in a complex environment is scientifically challenging. Current detection and diagnostic techniques are inadequate in major public health emergencies, such as outbreaks of food-borne illness. Detection of live

242

Contamination Control Techniques  

SciTech Connect

Welcome to a workshop on contamination Control techniques. This work shop is designed for about two hours. Attendee participation is encouraged during the workshop. We will address different topics within contamination control techniques; present processes, products and equipment used here at Hanford and then open the floor to you, the attendees for your input on the topics.

EBY, J.L.

2000-05-16T23:59:59.000Z

243

Applied Science/Techniques  

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

Applied Science/Techniques Print Applied Science/Techniques Print The ALS is an excellent incubator of new scientific techniques and instrumentation. Many of the technical advances that make the ALS a world-class soft x-ray facility are developed at the ALS itself. The optical components in use at the ALS-mirrors and lenses optimized for x-ray wavelengths-require incredibly high-precision surfaces and patterns (often formed through extreme ultraviolet lithography at the ALS) and must undergo rigorous calibration and testing provided by beamlines and equipment from the ALS's Optical Metrology Lab and Berkeley Lab's Center for X-Ray Optics. New and/or continuously improved experimental techniques are also a crucial element of a thriving scientific facility. At the ALS, examples of such "technique" highlights include developments in lensless imaging, soft x-ray tomography, high-throughput protein analysis, and high-power coherent terahertz radiation.

244

Observational signatures of Jordan-Brans-Dicke theories of gravity  

E-Print Network (OSTI)

We analyze the Jordan-Brans-Dicke model (JBD) of gravity, where deviations from General Relativity (GR) are described by a scalar field non-minimally coupled to gravity. The theory is characterized by a constant coupling parameter, $\\omega_{\\rm JBD}$; GR is recovered in the limit $\\omega_{\\rm JBD} \\to \\infty$. In such theories, gravity modifications manifest at early times, so that one cannot rely on the usual approach of looking for inconsistencies in the expansion history and perturbations growth in order to discriminate between JBD and GR. However, we show that a similar technique can be successfully applied to early and late times observables instead. Cosmological parameters inferred extrapolating early-time observations to the present will match those recovered from direct late-time observations only if the correct gravity theory is used. We use the primary CMB, as will be seen by the Planck satellite, as the early-time observable; and forthcoming and planned Supernov{\\ae}, Baryonic Acoustic Oscillations and Weak Lensing experiments as late-time observables. We find that detection of values of $\\omega_{\\rm JBD}$ as large as 500 and 1000 is within reach of the upcoming (2010) and next-generation (2020) experiments, respectively.

Viviana Acquaviva; Licia Verde

2007-09-01T23:59:59.000Z

245

Atomic Collapse Observed  

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

Collapse State Observed Aided by Simulations, Scientists Observe Atomic Collapse State Quantum Mechanics Prediction Confirmed in Graphene Using NERSC's Hopper April 26, 2013 |...

246

Geochemical Techniques | Open Energy Information  

Open Energy Info (EERE)

Geochemical Techniques Geochemical Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Geochemical Techniques Details Activities (0) Areas (0) Regions (0) NEPA(1) Exploration Technique Information Exploration Group: Geochemical Techniques Exploration Sub Group: None Parent Exploration Technique: Exploration Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Dictionary.png Geochemical Techniques: No definition has been provided for this term. Add a Definition Related Techniques Geochemical Techniques Geochemical Data Analysis Geothermometry Gas Geothermometry Isotope Geothermometry Liquid Geothermometry Cation Geothermometers Multicomponent Geothermometers Silica Geothermometers Thermal Ion Dispersion

247

Electrical Techniques | Open Energy Information  

Open Energy Info (EERE)

Electrical Techniques Electrical Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Electrical Techniques Details Activities (0) Areas (0) Regions (0) NEPA(1) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Electrical Techniques Parent Exploration Technique: Geophysical Techniques Information Provided by Technique Lithology: Rock composition, mineral and clay content Stratigraphic/Structural: Detection of permeable pathways, fracture zones, faults Hydrological: Resistivity influenced by porosity, grain size distribution, permeability, fluid saturation, fluid type and phase state of the pore water Thermal: Resistivity influenced by temperature Dictionary.png Electrical Techniques: Electrical techniques aim to image the electrical resistivity of the

248

Observations from the field: Solar domestic hot water installation recommendations  

SciTech Connect

The Florida Solar Energy Center (FSEC) was ten years old in 1984. Constant contact has been maintained between the Center and solar businesses selling and installing domestic hot water systems in Florida and throughout the Southern states of the Caribbean. FSEC has thus had the opportunity to visit or discuss thousands of DHW system installations with homeowners and installers. This paper provides an overview of lessons learned and some of the resulting installation recommendations for direct, open-loop domestic hot water systems.

Cromer, C.J.

1985-01-01T23:59:59.000Z

249

ARM - Field Campaign - Observations and Modeling of the Green...  

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

will be used to quantify and understand secondary organic aerosol (SOA) formation and aging at the T3 site during GoAmazon2014. In the OFR, high OH concentrations are produced by...

250

Distinct Hydrological Signatures in Observed Historical Temperature Fields  

Science Conference Proceedings (OSTI)

In an atmospheric general circulation model (AGCM), the physical bounds on soil moisture content and the nonlinear relationship between soil moisture and evaporation lead to distinct geographical patterns in key surface energy and water balance ...

Randal D. Koster; Max J. Suarez; Siegfried D. Schubert

2006-10-01T23:59:59.000Z

251

Using Structured Interviewing Techniques  

E-Print Network (OSTI)

GAO assists congressional decisionmakers in their deliberative process by furnishing analytical information on issues and options under consideration. Many diverse methodologies are needed to develop sound and timely answers to the questions that are posed by the Congress. To provide GAO evaluators with basic information about the more commonly used methodologies, GAOs policy guidance includes documents such as methodology transfer papers and technical guidelines, This methodology transfer paper on using structured interviewing techniques discusses how GAO evaluators should incorporate structured interview techniques when appropriate to performing our work. It explains when these techniques should be

Gao/pemd-. Preface; Werner Grosshans

1991-01-01T23:59:59.000Z

252

VLF Technique and Science in India  

Science Conference Proceedings (OSTI)

Since IGY period (1957-58), natural and artificially produced Very Low Frequency (VLF) electromagnetic radiations are being recorded at large number of ground stations and on board satellites to study various wave-plasma interactive phenomena. The terrestrial propagation of these VLF radio waves are primarily enabled through the earth ionosphere wave guide (EIWG) system to long horizontal distances around the globe and ducted along the geomagnetic field lines into the conjugate hemisphere through the ionosphere-plasmasphere-magnetosphere routes. The time frequency spectra indicate presence of dispersion and various cut-off frequencies providing several types of received signals like whistlers, chorus, tweeks, hiss, hisslers etc., which can be heard on an earphone with distinguishing audio structures. While the VLF technique has been a very effective tool for studying middle and high latitude phenomena, the importance of various anomalous characteristics over the Indian low latitude stations provide potentially new challenges for their scientific interpretation and modelling. The ducted and non-ducted propagation, low latitude TRIMPI/TLE effects, D-region ionisation perturbations due to solar and stellar x- and {gamma} ray emissions and detecting precursors of seismic activities are a few problems which will gain from low latitude studies. Since the conjugate points of Indian stations lie over the Indian oceanic region, the VLF propagation effects would be relatively noise free to observe rare and new phenomena requiring better SNR to detect such changes. The VLF signals emanating from the active seismic zones would require high sensitivity of the system and suitable network of transmitting and receiving stations. Results obtained on whistlers and related studies from a number of Indian stations covering geomagnetic latitude range between 13-24 deg. N are mentioned and reviewed in the background of theoretical understanding of the lightning return stroke signal elements, VLF propagation through cold plasma, ionospheric wave guide mode, electron precipitation due to cyclotron resonance and production of ionisation in the D-region due to solar/stellar UV/X/{gamma}-rays. Further use of the VLF technique in terms of improving both observational data for real time monitoring/modelling of geophysical phenomena and exploring space weather conditions are considered as part of a future Indian programme.

Chakravarty, S. C. [Member, Governing Body, Indian Centre for Space Physics, Kolkata (India)

2010-10-20T23:59:59.000Z

253

Magnetotelluric Techniques | Open Energy Information  

Open Energy Info (EERE)

Magnetotelluric Techniques Magnetotelluric Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Magnetotelluric Techniques Details Activities (0) Areas (0) Regions (0) NEPA(2) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Electrical Techniques Parent Exploration Technique: Electromagnetic Sounding Techniques Information Provided by Technique Lithology: Rock composition, mineral and clay content Stratigraphic/Structural: Detection of permeable pathways, fracture zones, faults Hydrological: Resistivity influenced by porosity, grain size distribution, permeability, fluid saturation, fluid type and phase state of the pore water Thermal: Resistivity influenced by temperature Dictionary.png Magnetotelluric Techniques:

254

Downhole Techniques | Open Energy Information  

Open Energy Info (EERE)

Downhole Techniques Downhole Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Downhole Techniques Details Activities (0) Areas (0) Regions (0) NEPA(7) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: None Parent Exploration Technique: Exploration Techniques Information Provided by Technique Lithology: Determination of lithology, grain size Stratigraphic/Structural: Thickness and geometry of rock strata, fracture identification Hydrological: Porosity, permeability, water saturation Thermal: Formation temperature with depth Dictionary.png Downhole Techniques: Downhole techniques are measurements collected from a borehole environment which provide information regarding the character of formations and fluids

255

Geophysical Techniques | Open Energy Information  

Open Energy Info (EERE)

Geophysical Techniques Geophysical Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Geophysical Techniques Details Activities (2) Areas (1) Regions (0) NEPA(4) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: None Parent Exploration Technique: Exploration Techniques Information Provided by Technique Lithology: may be inferred Stratigraphic/Structural: may be inferred Hydrological: may be inferred Thermal: may be inferred Dictionary.png Geophysical Techniques: Geophysics is the study of the structure and composition of the earth's interior. Other definitions:Wikipedia Reegle Introduction Geophysical techniques measure physical phenomena of the earth such as gravity, magnetism, elastic waves, electrical and electromagnetic waves.

256

The effects of pseudo magnetic fields in molecular spectra and scattering  

SciTech Connect

Pseudo magnetic fields appear in the Born-Oppenheimer method for molecules when conical intersections or electronic angular momenta are taken into account. These fields are not real magnetic fields but they have the same mathematical properties and can lead to real observable effects in the dynamics of molecules. A general vector potential (gauge theory) approach for including these field effects in the Born-Oppenheimer method is introduced and applied to H + O{sub 2} scattering and the vibrational spectrum of Na{sub 3}(X) for zero total angular momentum (J = 0). The scattering results for HO{sub 2} show significant shifts in the resonance energies and lifetimes due to a magnetic solenoid type field originating from the C{sub 2v} conical intersection in HO{sub 2}. Significant changes in the state-to-state transition probabilities are also observed. The non-degenerate A{sub 1} and A{sub 2} vibrational spectra of Na{sub 3}(X) show significant shifts in the energy levels due to a magnetic solenoid type field originating from the D{sub 3h} conical intersection in Na{sub 3}. These two examples show that the effects of pseudo magnetic fields can be significant and in many cases they must be included in order to obtain agreement between theory and experiment. The newly developed gauge theory techniques for treating pseudo magnetic fields are also relevant for including the effects of real magnetic fields.

Kendrick, B. [Los Alamos National Lab., NM (United States). Theoretical Div.

1996-12-31T23:59:59.000Z

257

Field Mapping At Dixie Valley Geothermal Field Area (Wesnousky, Et Al.,  

Open Energy Info (EERE)

2003) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Field Mapping At Dixie Valley Geothermal Field Area (Wesnousky, Et Al., 2003) Exploration Activity Details Location Dixie Valley Geothermal Field Area Exploration Technique Field Mapping Activity Date Usefulness not indicated DOE-funding Unknown References Steven Wesnousky, S. John Caskey, John W. Bell (2003) Recency Of Faulting And Neotechtonic Framework In The Dixie Valley Geothermal Field And Other Geothermal Fields Of The Basin And Range Retrieved from "http://en.openei.org/w/index.php?title=Field_Mapping_At_Dixie_Valley_Geothermal_Field_Area_(Wesnousky,_Et_Al.,_2003)&oldid=510736" Categories: Exploration Activities DOE Funded Activities What links here

258

Similarity Matching Techniques for Fault Diagnosis in Automotive Infotainment Electronics  

E-Print Network (OSTI)

Fault diagnosis has become a very important area of research during the last decade due to the advancement of mechanical and electrical systems in industries. The automobile is a crucial field where fault diagnosis is given a special attention. Due to the increasing complexity and newly added features in vehicles, a comprehensive study has to be performed in order to achieve an appropriate diagnosis model. A diagnosis system is capable of identifying the faults of a system by investigating the observable effects (or symptoms). The system categorizes the fault into a diagnosis class and identifies a probable cause based on the supplied fault symptoms. Fault categorization and identification are done using similarity matching techniques. The development of diagnosis classes is done by making use of previous experience, knowledge or information within an application area. The necessary information used may come from several sources of knowledge, such as from system analysis. In this paper similarity matching tec...

Kabir, Mashud

2009-01-01T23:59:59.000Z

259

Dangerous electromagnetic fields?  

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

Dangerous electromagnetic fields? Dangerous electromagnetic fields? Name: Tommy T Joseph Location: N/A Country: N/A Date: N/A Question: Why are electromagnetic fields supposedly dangerous? Replies: I assume you are asking about power line frequency (60 Hz) fields, since they have been in the news lately. No one knows for sure that they are dangerous. There have been a few studies which seem to show an association between how close homes are to power lines, and the incidence of childhood cancer (mostly leukemia) in children living (or who have lived) in those homes. Other similar studies have not found such an association. In all the studies which have found an association, none has actually measured the fields. Studies which actually have measured the fields find no association. There is no known mechanism for 60 Hz fields to cause cancer. Furthermore, the classic "dose-response relationship," that is, the greater the dose, the greater the response, does not seem to work here. Many laboratory studies have found that 60 Hz fields have an effect on organisms under certain conditions, but none of the observed effects can be convincingly related to a hazard. The bottom line is, no one knows for sure. It is important to realize that it is impossible to prove that anything is completely safe. My personal opinion is that, if there is a risk, it must be very small, or it wouldn't be so hard to prove. I can supply some good unbiased references if you are interested.

260

Definition: Active Seismic Techniques | Open Energy Information  

Open Energy Info (EERE)

Seismic Techniques Seismic Techniques Jump to: navigation, search Dictionary.png Active Seismic Techniques Active seismic techniques study the behavior of artificially-generated elastic waves in the subsurface. A seismic wave or pulse is generated at the surface by an active seismic source which can be a vibration, mechanical impact, or near-surface explosion.[1] View on Wikipedia Wikipedia Definition Seismic waves are waves of energy that travel through the Earth's layers, and are a result of an earthquake, explosion, or a volcano that imparts low-frequency acoustic energy. Many other natural and anthropogenic sources create low amplitude waves commonly referred to as ambient vibrations. Seismic waves are studied by geophysicists called seismologists. Seismic wave fields are recorded by a seismometer,

Note: This page contains sample records for the topic "field techniques observation" 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

Observational Tests of Modified Gravity  

E-Print Network (OSTI)

Modified gravity theories have richer observational consequences for large-scale structure than conventional dark energy models, in that different observables are not described by a single growth factor even in the linear regime. We examine the relationships between perturbations in the metric potentials, density and velocity fields, and discuss strategies for measuring them using gravitational lensing, galaxy cluster abundances, galaxy clustering/dynamics and the ISW effect. We show how a broad class of gravity theories can be tested by combining these probes. A robust way to interpret observations is by constraining two key functions: the ratio of the two metric potentials, and the ratio of the Gravitational ``constant'' in the Poisson equation to Newton's constant. We also discuss quasilinear effects that carry signatures of gravity, such as through induced three-point correlations. Clustering of dark energy can mimic features of modified gravity theories and thus confuse the search for distinct signatures of such theories. It can produce pressure perturbations and anisotropic stresses, which breaks the equality between the two metric potentials even in general relativity. With these two extra degrees of freedom, can a clustered dark energy model mimic modified gravity models in all observational tests? We show with specific examples that observational constraints on both the metric potentials and density perturbations can in principle distinguish modifications of gravity from dark energy models. We compare our result with other recent studies that have slightly different assumptions (and apparently contradictory conclusions).

Bhuvnesh Jain; Pengjie Zhang

2007-09-17T23:59:59.000Z

262

Seismic Techniques | Open Energy Information  

Open Energy Info (EERE)

Seismic Techniques Seismic Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Seismic Techniques Details Activities (0) Areas (0) Regions (0) NEPA(10) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Seismic Techniques Parent Exploration Technique: Geophysical Techniques Information Provided by Technique Lithology: Rock unit density influences elastic wave velocities. Stratigraphic/Structural: Structural geology- faults, folds, grabens, horst blocks, sedimentary layering, discontinuities, etc. Hydrological: Combining compressional and shear wave results can indicate the presence of fluid saturation in the formation. Thermal: High temperatures and pressure impact the compressional and shear wave velocities.

263

Generating Minimally Coupled Einstein-Scalar Field Solutions from Vacuum Solutions with Arbitrary Cosmological Constant  

E-Print Network (OSTI)

This paper generalizes two previously known techniques for generating minimally coupled Einstein-scalar field solutions in 4 dimensions; the Buchdahl and Fonarev transformations. By applying this solution generation technique, minimally coupled Einstein-scalar field solutions can be generated from vacuum solutions with arbitrary cosmological constant in arbitrary dimension. The only requirement to a seed solution is that it posesses a hypersurface-orthogonal Killing vector field. The generalization that allows us to use seed solutions with arbitrary cosmological constant uncovers a new class of Einstein-scalar field solutions that has previously not been studied. We apply the new solution transformation to the (A)dS4 vacuum solution. Transforming the resulting Einstein-scalar field solution to the conformal frame, a two-parameter family of spatially finite, expanding and accelerating cosmological solutions are found that are conformally isometric to the Einstein static universe RxS^3. We study null geodesics and find that for any observer, the solution has a cosmological horizon at an angular distance of pi/2 away from the observer. We find that a subset of these solutions can be naturally interpreted as expanding cosmologies in which a scalar black hole is formed at late times. The conformally coupled scalar field satisfies the weak energy condition as long as the energy density is positive, while the strong energy condition is generally violated.

Kjell Tangen

2007-05-30T23:59:59.000Z

264

Effects of Secular Changes in Frequency of Observations and Observational Errors on Monthly Mean MSLP Summary Statistics Derived from ICOADS  

Science Conference Proceedings (OSTI)

A Monte Carlo technique has been employed to assess how sextile mean sea level pressure (MSLP) statistics derived from ship observations can be affected by changes in the frequency of observations. The results show that when the number of ...

Edmund K. M. Chang

2005-09-01T23:59:59.000Z

265

Observation of Ultrahigh-Energy Cosmic Rays with the ANITA Balloon-Borne Radio Interferometer  

Science Conference Proceedings (OSTI)

We report the observation of 16 cosmic ray events with a mean energy of 1.5x10{sup 19} eV via radio pulses originating from the interaction of the cosmic ray air shower with the Antarctic geomagnetic field, a process known as geosynchrotron emission. We present measurements in the 300-900 MHz range, which are the first self-triggered, first ultrawide band, first far-field, and the highest energy sample of cosmic ray events collected with the radio technique. Their properties are inconsistent with current ground-based geosynchrotron models. The emission is 100% polarized in the plane perpendicular to the projected geomagnetic field. Fourteen events are seen to have a phase inversion due to reflection of the radio beam off the ice surface, and two additional events are seen directly from above the horizon. Based on a likelihood analysis, we estimate angular pointing precision of order 2 deg. for the event arrival directions.

Hoover, S.; Belov, K.; Vieregg, A. G.; Saltzberg, D. [Department of Physics and Astronomy, University of California, Los Angeles, California 90095 (United States); Nam, J. [Department of Physics, Ewha Womans University, Seoul (Korea, Republic of); Gorham, P. W.; Allison, P.; Kowalski, J.; Learned, J. G.; Matsuno, S.; Miki, C.; Miocinovic, P.; Romero-Wolf, A.; Rosen, M.; Ruckman, L.; Varner, G. S. [Department of Physics and Astronomy, University of Hawaii, Manoa, Hawaii 96822 (United States); Grashorn, E.; Beatty, J. J.; Mercurio, B. C.; Palladino, K. [Department of Physics, Ohio State University, Columbus, Ohio 43210 (United States)

2010-10-08T23:59:59.000Z

266

Formation of Antihydrogen Rydberg atoms in strong magnetic field traps  

SciTech Connect

It is shown that several features of antihydrogen production in nested Penning traps can be described with accurate and efficient Monte Carlo simulations. It is found that cold deeply-bound Rydberg states of antihydrogen (H-bar) are produced in three-body capture in the ATRAP experiments and an additional formation mechanism -Rydberg charge transfer-, particular to the nested Penning trap geometry, is responsible for the observed fast (hot) H-bar atoms. Detailed description of the numerical propagation technique for following extreme close encounters is given. An analytic derivation of the power law behavior of the field ionization spectrum is provided.

Pohl, T.; Sadeghpour, H. R. [ITAMP, Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge MA 02138 (United States)

2008-08-08T23:59:59.000Z

267

Low-magnetic-field magnetars  

E-Print Network (OSTI)

It is now widely accepted that soft gamma repeaters and anomalous X-ray pulsars are the observational manifestations of magnetars, i.e. sources powered by their own magnetic energy. This view was supported by the fact that these `magnetar candidates' exhibited, without exception, a surface dipole magnetic field (as inferred from the spin-down rate) in excess of the electron critical field (~4.4E+13 G). The recent discovery of fully-qualified magnetars, SGR 0418+5729 and Swift J1822.3-1606, with dipole magnetic field well in the range of ordinary radio pulsars posed a challenge to the standard picture, showing that a very strong field is not necessary for the onset of magnetar activity (chiefly bursts and outbursts). Here we summarize the observational status of the low-magnetic-field magnetars and discuss their properties in the context of the mainstream magnetar model and its main alternatives.

Turolla, R

2013-01-01T23:59:59.000Z

268

Lipid Analysis and Lipidomics: New Techniques and Application  

Science Conference Proceedings (OSTI)

Lipid Analysis will offer the lipid analyst an array of essential analytical tools in the fields of chromatography, mass spectrometry, spectroscopy, magnetic resonance, and chemometrics. Lipid Analysis and Lipidomics: New Techniques and Application Method

269

An Improved Filter Technique for Ice Nucleus Measurements  

Science Conference Proceedings (OSTI)

No satisfactory standard field method has been established for the measurement of ice nucleus concentrations, although the filter technique is a promising candidate if the tendency for ice nucleus concentrations to decrease as the sample volume ...

Chi-Fan Shih; Takeshi Ohtake

1985-09-01T23:59:59.000Z

270

African Easterly Waves during 2004Analysis Using Objective Techniques  

Science Conference Proceedings (OSTI)

African easterly waves (AEWs) are identified in numerical model analyses using an objective technique based on the 700-hPa streamfunction field. This method has been developed to (i) reduce the amount of manual data interpretation, (ii) reduce ...

Gareth Berry; Chris Thorncroft; Tim Hewson

2007-04-01T23:59:59.000Z

271

Field reversed ion rings  

DOE Green Energy (OSTI)

In typical field-reversed ion ring experiments, an intense annular ion beam is injected across a plasma-filled magnetic cusp region into a neutral gas immersed in a ramped solenoidal magnetic field. Assuming the characteristic ionization time is much shorter than the long ({ital t}{approx_gt}2{pi}/{Omega}{sub {ital i}}) beam evolution time scale, we investigate the formation of an ion ring in the background plasma followed by field reversal, using a 21/2-D hybrid, PIC code FIRE, in which the beam and background ions are treated as particles and the electrons as a massless fluid. We show that beam bunching and trapping occurs downstream in a ramped magnetic field for an appropriate set of experimental parameters. We find that a compact ion ring is formed and a large field reversal {zeta}={delta}{ital B}/{ital B}{approx_gt}1 on axis develops. We also observe significant deceleration of the ring on reflection due to the transfer of its axial momentum to the background ions, which creates favorable trapping conditions. {copyright} {ital 1995 American Institute of Physics.}

Sudan, R.N.; Omelchenko, Y.A. [Laboratory of Plasma Studies, Cornell University, Ithaca, New York 14853 (United States)

1995-09-01T23:59:59.000Z

272

Artificial Stereo Presentation of Meteorological Data Fields  

Science Conference Proceedings (OSTI)

The innate capability to perceive 3-dimensional stereo imagery has been exploited to present multidimensional meteorological data fields. Variations on an artificial stereo technique first discussed by Pichel et al (1973) are used to display ...

A. F. Hasler; M. desJardins; A. J. Negri

1981-07-01T23:59:59.000Z

273

Toward Objective, Standardized Intensity Estimates from Surface Wind Speed Observations  

Science Conference Proceedings (OSTI)

Extreme wind climatology and event-specific intensity assessments rely heavily on surface wind field observations. The most widely used platforms sited at airports are the Automated Surface Observing System (ASOS) and its predecessor, the ...

Forrest J. Masters; Peter J. Vickery; Phuong Bacon; Edward N. Rappaport

2010-12-01T23:59:59.000Z

274

Overcoming the far-field diffraction limit via absorbance modulation  

E-Print Network (OSTI)

Diffraction limits the resolution of far-field lithography and imaging to about half of the wavelength, which greatly limits the capability of optical techniques. The proposed technique with absorbance modulation aims to ...

Tsai, Hsin-Yu Sidney

2011-01-01T23:59:59.000Z

275

An Improved, Free Surface, Topographic Technique  

Science Conference Proceedings (OSTI)

Current techniques of water wave visualization such as shadowgraphy and stereo photography are widely used but are deficient in many aspects. Refraction based visualization observes the bending of light as it traverses across a liquid-air interface. ... Keywords: Free Surface, PIV, Topography, Visualization

A. Fouras; K. Hourigan; M. Kawahashi; H. Hirahara

2006-01-01T23:59:59.000Z

276

Resin infiltration transfer technique  

DOE Patents (OSTI)

A process has been developed for fabricating composite structures using either reaction forming or polymer infiltration and pyrolysis techniques to densify the composite matrix. The matrix and reinforcement materials of choice can include, but are not limited to, silicon carbide (SiC) and zirconium carbide (ZrC). The novel process can be used to fabricate complex, net-shape or near-net shape, high-quality ceramic composites with a crack-free matrix.

Miller, David V. (Pittsburgh, PA); Baranwal, Rita (Glenshaw, PA)

2009-12-08T23:59:59.000Z

277

Automated Surface Observing System: Standby Power Options  

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

Automated Automated Surface Observing System Standby Options Power Automated Surface Observing System (ASOS) General System Description * Self contained group of sensors and data gathering equipment that produces an automated weather observation * Weather observations support aviation, climate data, non government weather operations, public consumption, etc. * Initial deployment began in 1991 and continued through 1997 * Located at 884 sites nationwide, normally at airports * System has two distinct subsystems: Field installed equipment (DCP & Sensor Group) and an indoor processor (ACU) with peripherals * Separate facility power for DCP & Sensors and ACU 1 * measure and collect data * Located on the airport * back up group for 10 minutes * Currently pl

278

Definition: Seismic Techniques | Open Energy Information  

Open Energy Info (EERE)

Techniques Techniques Seismic methods provide information regarding the elastic properties of the subsurface through the measurement of the propagation velocity of elastic waves.[1] View on Wikipedia Wikipedia Definition Seismology /saɪzˈmɒlədʒi/ is the scientific study of earthquakes and the propagation of elastic waves through the Earth or through other planet-like bodies. The field also includes studies of earthquake effects, such as tsunamis as well as diverse seismic sources such as volcanic, tectonic, oceanic, atmospheric, and artificial processes (such as explosions). A related field that uses geology to infer information regarding past earthquakes is paleoseismology. A recording of earth motion as a function of time is called a seismogram. A seismologist

279

Active load control techniques for wind turbines.  

DOE Green Energy (OSTI)

This report provides an overview on the current state of wind turbine control and introduces a number of active techniques that could be potentially used for control of wind turbine blades. The focus is on research regarding active flow control (AFC) as it applies to wind turbine performance and loads. The techniques and concepts described here are often described as 'smart structures' or 'smart rotor control'. This field is rapidly growing and there are numerous concepts currently being investigated around the world; some concepts already are focused on the wind energy industry and others are intended for use in other fields, but have the potential for wind turbine control. An AFC system can be broken into three categories: controls and sensors, actuators and devices, and the flow phenomena. This report focuses on the research involved with the actuators and devices and the generated flow phenomena caused by each device.

van Dam, C.P. (University of California, Davis, CA); Berg, Dale E.; Johnson, Scott J. (University of California, Davis, CA)

2008-07-01T23:59:59.000Z

280

Technique Subgroupings Spectroscopy  

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

and NSLS-II beamlines according to DOE Technique Scheme and NSLS-II beamlines according to DOE Technique Scheme Technique Subgroupings Spectroscopy 01 - Low Energy Spectroscopy Infrared Photoemission U12IR, U4IR / MET* U5UA, U13 / ESM 02 - Soft X-Ray Spectroscopy Soft X-ray Spectroscopy Tender XAS U4B, U7A, X24A / SST, SSS* X15B, X19A / TES* 03 - Hard X-ray Spectroscopy EXAFS X3A, X3B, X11A, X11B, X18A, X18B, X23A2 / ISS, BMM, QAS*, XAS* 04 - Optics/Calibration/Metrology U3C,X8A/ OFT,MID Scattering 05 X-ray Diffraction X-Ray Powder Diffraction Extreme Conditions Energy Dispersive Micro-Beam Diffraction X7B,X10B,X14A,X16C,X17A / XPD,IXD* X17B2,X17B3,X17C / XPD, TEC*, 4DE* X17B1, X17B2 / NA X13B / MXD* 06 MX, footprinting Protein Crystallography X-ray footprinting X4A, X4C, X6A, X12B, X12C, X25, X29 / FMX, AMX, NYX;

Note: This page contains sample records for the topic "field techniques observation" 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

Ground Gravity Survey At Dixie Valley Geothermal Field Area ...  

Open Energy Info (EERE)

Details Location Dixie Valley Geothermal Field Area Exploration Technique Ground Gravity Survey Activity Date Usefulness useful DOE-funding Unknown Notes The gravity data are...

282

Field Mapping At Mccoy Geothermal Area (DOE GTP) | Open Energy...  

Open Energy Info (EERE)

Mccoy Geothermal Area (DOE GTP) Exploration Activity Details Location Mccoy Geothermal Area Exploration Technique Field Mapping Activity Date Usefulness not indicated DOE-funding...

283

Aeromagnetic Survey At Dixie Valley Geothermal Field Area (Blackwell...  

Open Energy Info (EERE)

Details Location Dixie Valley Geothermal Field Area Exploration Technique Aeromagnetic Survey Activity Date Usefulness useful DOE-funding Unknown Notes In 2002 a high-resolution...

284

Field-induced strain associated with polarization reversal in...  

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

() to the poling direction were deter- mined by a linear variable differential transformer and strain gauge technique, 8 respectively. The field-induced strains reported...

285

Drilling Techniques | Open Energy Information  

Open Energy Info (EERE)

Page Page Edit with form History Facebook icon Twitter icon » Drilling Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Drilling Techniques Details Activities (0) Areas (0) Regions (0) NEPA(20) Exploration Technique Information Exploration Group: Drilling Techniques Exploration Sub Group: None Parent Exploration Technique: Exploration Techniques Information Provided by Technique Lithology: Identify lithology and mineralization, provide core samples and rock cuttings Stratigraphic/Structural: Retrieved samples can be used to identify stratigraphy and structural features such as fracture networks or faults Hydrological: -Water samples can be used for geochemical analysis -Fluid pressures can be used to estimate flow rates

286

Techniques for Measuring Residual Stresses  

Science Conference Proceedings (OSTI)

Table 1   Classification of techniques for measuring residual stress...stress A-1 Stress-relaxation techniques using electric

287

Techniques for Measuring Residual Stresses  

Science Conference Proceedings (OSTI)

Table 1   Classification of techniques for measuring residual stress...stress A-1 Stress relaxation techniques using electric

288

Protocols from perceptual observations  

Science Conference Proceedings (OSTI)

This paper presents a cognitive vision system capable of autonomously learning protocols from perceptual observations of dynamic scenes. The work is motivated by the aim of creating a synthetic agent that can observe a scene containing interactions between ... Keywords: Autonomous learning, Cognitive vision, Inductive logic programming, Spatio-temporal reasoning, Symbol grounding, Unsupervised clustering

Chris J. Needham; Paulo E. Santos; Derek R. Magee; Vincent Devin; David C. Hogg; Anthony G. Cohn

2005-09-01T23:59:59.000Z

289

Determination of far-field antenna patterns from near-field measurements  

E-Print Network (OSTI)

Abstracf-In many cases, it is impractical or impossible to make antenna patfern measurements on a conventional far-field range; the distance to the radiating far field may be too long, it may be impractical to move the antenna from its operating environment to an antenna range, or the desired amount of pattern data may require too much time on a far-field range. For these and other reasons, it is often desirable or necessary to determine far-field antenna patterns from measurements made in the radiating near-field region; three basic techniques for accomplishing this have proven to be successful. In the 6rst technique, the aperture phase and amplitude distributions are sampled by a scanning field probe, and then the measured distributions are transformed to the far field. In the second technique, a plane wave that is approximately uniform in amplitude is created by a feed and large reflector in the immediate vicinity of the test antenna. And in the third technique, the test antenna is focused within the radiating near-field region, patterns are measured at the reduced range, and then the antenna is refocused to infinity. Each of these techniques is discussed, and the various advantages and limitations of each technique are presented.

Richard C. Johnson; H. Allen Ecrer; J. Searcy Hollis

1973-01-01T23:59:59.000Z

290

Category:Gravity Techniques | Open Energy Information  

Open Energy Info (EERE)

Techniques page? For detailed information on Gravity Techniques, click here. Category:Gravity Techniques Add.png Add a new Gravity Techniques Technique Pages in category "Gravity...

291

Global ice cloud observations: radiative properties and statistics from moderate-resolution imaging spectroradiometer measurements  

E-Print Network (OSTI)

Ice clouds occur quite frequently, yet so much about these clouds is unknown. In recent years, numerous investigations and field campaigns have been focused on the study of ice clouds, all with the ultimate goal of gaining a better understanding of microphysical and optical properties, as well as determining the radiative impact. Perhaps one of the most recognized instruments used for such research is the Moderate-resolution Imaging Spectroradiometer (MODIS), carried aboard the NASA EOS satellites Terra and Aqua. The present research aims to support ongoing efforts in the field of ice cloud research by use of observations obtained from Terra and Aqua MODIS. First, a technique is developed to infer ice cloud optical depth from the MODIS cirrus reflectance parameter. This technique is based on a previous method developed by Meyer et al. (2004). The applicability of the algorithm is demonstrated with retrievals from level-2 and -3 MODIS data. The technique is also evaluated with the operational MODIS cloud retrieval product and a method based on airborne ice cloud observations. From this technique, an archive of daily optical depth retrievals is constructed. Using simple statistics, the global spatial and temporal distributions of ice clouds are determined. Research has found that Aqua MODIS observes more frequent ice clouds and larger optical depths and ice water paths than does Terra MODIS. Finally, an analysis of the time series of daily optical depth values revealed that ice clouds at high latitudes, which are most likely associated with synoptic scale weather sytems, persist long enough to move with the upper level winds. Tropical ice clouds, however, dissipate more rapidly, and are in all likelihood associated with deep convective cells.

Meyer, Kerry Glynne

2007-08-01T23:59:59.000Z

292

Arithmetic, mutually unbiased bases and complementary observables  

Science Conference Proceedings (OSTI)

Complementary observables in quantum mechanics may be viewed as Frobenius structures in a dagger monoidal category, such as the category of finite dimensional Hilbert spaces over the complex numbers. On the other hand, their properties crucially depend on the discrete Fourier transform and its associated quantum torus, requiring only the finite fields that underlie mutually unbiased bases. In axiomatic topos theory, the complex numbers are difficult to describe and should not be invoked unnecessarily. This paper surveys some fundamentals of quantum arithmetic using finite field complementary observables, with a view considering more general axiom systems.

Sheppeard, M. D. [Oxford University Computing Laboratory, Wolfson Building, Parks Rd., Oxford OX1 3QD (United Kingdom)

2010-02-15T23:59:59.000Z

293

TECHNIQUE, REFERENCE STANDARD, EQUIPMENT  

E-Print Network (OSTI)

has met the requirements of the IAS Accreditation Criteria for Calibration Laboratories (AC204), has demonstrated compliance with the ANS/ISO/IEC Standard 17025:2005, General requirements for the competence of testing and calibration laboratories, and has been accredited commencing July 10, 2012, for the calibration discipline(s) listed in the approved scope of accreditation. The laboratory meets IAS program requirements in the field of calibration.

Teknik Malzeme; Is Merkezi; Yenisehir Izmir; Patrick V. Mccullen; C. P. Ramani; Teknik Malzeme Merkezi; M Meatest; Multifunction Calibrator

2012-01-01T23:59:59.000Z

294

A Technique for Characterizing Surfactants on the AirSea Interface  

Science Conference Proceedings (OSTI)

An optical-electronic technique has been developed for simultaneous, remote measurements of the surface tension and wave attenuation over the water surface. The technique has been fully tested in a laboratory tank, and tried in the field. Sample ...

Jin Wu; Yi Wei

1990-02-01T23:59:59.000Z

295

A Superconducting Joint Technique for MgB[subscript 2] Round Wires  

E-Print Network (OSTI)

This paper describes a technique to superconductively splice multifilament MgB2 wires. To date the technique has achieved joints capable of carrying a superconducting current of 200 A at 10 K in self field. Joints details, ...

Yao, Weijun

296

A Technique for Deducing Wind Direction from Satellite Microwave Measurements of Wind Speed  

Science Conference Proceedings (OSTI)

A technique is presented to deduce wind direction from satellite microwave measurements of wind speed information. The technique, based on simple Ekman boundary layer dynamics, makes use of surface pressure fields routinely analyzed at the ...

Tsann-wang Yu

1987-09-01T23:59:59.000Z

297

Field observations and numerical model experiments for the snowmelt process at a field site  

E-Print Network (OSTI)

variation of solar angle and distance between sun and earth.normal to the sun by means of the solar constant, S SC =the position of the sun. Solar zenith angle h 0 (rad) on the

Ohara, N; Kawas, M L

2006-01-01T23:59:59.000Z

298

Green Thunderstorms Observed  

Science Conference Proceedings (OSTI)

Green thunderstorms have been observed from time to time in association with deep convection or severe weather events. Often the green coloration has been attributed to hail or to reflections of light from green foliage on the ground. Some ...

Frank W. Gallagher III; William H. Beasley; Craig F. Bohren

1996-12-01T23:59:59.000Z

299

Tropical observability and predictability  

E-Print Network (OSTI)

Many studies have investigated tropical data assimilation in the context of global models or specifically for tropical cyclones, but relatively few have focused on the mesoscale predictability and observability of the ...

Whitcomb, Timothy Robert

2008-01-01T23:59:59.000Z

300

Multifunctional Mesoscale Observing Networks  

Science Conference Proceedings (OSTI)

More than 120 scientists, engineers, administrators, and users met on 810 December 2003 in a workshop format to discuss the needs for enhanced three-dimensional mesoscale observing networks. Improved networks are seen as being critical to ...

Walter F. Dabberdt; Thomas W. Schlatter; Frederick H. Carr; Elbert W. Joe Friday; David Jorgensen; Steven Koch; Maria Pirone; F. Martin Ralph; Juanzhen Sun; Patrick Welsh; James W. Wilson; Xiaolei Zou

2005-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "field techniques observation" 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

Vadose Zone Transport Field Study: Summary Report  

SciTech Connect

From FY 2000 through FY 2003, a series of vadose zone transport field experiments were conducted as part of the U.S. Department of Energys Groundwater/Vadose Zone Integration Project Science and Technology Project, now known as the Remediation and Closure Science Project, and managed by the Pacific Northwest National Laboratory (PNNL). The series of experiments included two major field campaigns, one at a 299-E24-11 injection test site near PUREX and a second at a clastic dike site off Army Loop Road. The goals of these experiments were to improve our understanding of vadose zone transport processes; to develop data sets to validate and calibrate vadose zone flow and transport models; and to identify advanced monitoring techniques useful for evaluating flow-and-transport mechanisms and delineating contaminant plumes in the vadose zone at the Hanford Site. This report summarizes the key findings from the field studies and demonstrates how data collected from these studies are being used to improve conceptual models and develop numerical models of flow and transport in Hanfords vadose zone. Results of these tests have led to a better understanding of the vadose zone. Fine-scale geologic heterogeneities, including grain fabric and lamination, were observed to have a strong effect on the large-scale behavior of contaminant plumes, primarily through increased lateral spreading resulting from anisotropy. Conceptual models have been updated to include lateral spreading and numerical models of unsaturated flow and transport have revised accordingly. A new robust model based on the concept of a connectivity tensor was developed to describe saturation-dependent anisotropy in strongly heterogeneous soils and has been incorporated into PNNLs Subsurface Transport Over Multiple Phases (STOMP) simulator. Application to field-scale transport problems have led to a better understanding plume behavior at a number of sites where lateral spreading may have dominated waste migration (e.g. BC Cribs and Trenches). The improved models have been also coupled with inverse models and newly-developed parameter scaling techniques to allow estimation of field-scale and effective transport parameters for the vadose zone. The development and utility of pedotransfer functions for describing fine-scale hydrogeochemical heterogeneity and for incorporating this heterogeneity into reactive transport models was explored. An approach based on grain-size statistics appears feasible and has been used to describe heterogeneity in hydraulic properties and sorption properties, such as the cation exchange capacity and the specific surface area of Hanford sediments. This work has also led to the development of inverse modeling capabilities for time-dependent, subsurface, reactive transport with transient flow fields using an automated optimization algorithm. In addition, a number of geophysical techniques investigated for their potential to provide detailed information on the subtle changes in lithology and bedding surfaces; plume delineation, leak detection. High-resolution resistivity is now being used for detecting saline plumes at several waste sites at Hanford, including tank farms. Results from the field studies and associated analysis have appeared in more than 46 publications generated over the past 4 years. These publications include test plans and status reports, in addition to numerous technical notes and peer reviewed papers.

Ward, Andy L.; Conrad, Mark E.; Daily, William D.; Fink, James B.; Freedman, Vicky L.; Gee, Glendon W.; Hoversten, Gary M.; Keller, Jason M.; Majer, Ernest L.; Murray, Christopher J.; White, Mark D.; Yabusaki, Steven B.; Zhang, Z. F.

2006-07-31T23:59:59.000Z

302

Gravity Techniques | Open Energy Information  

Open Energy Info (EERE)

Gravity Techniques Gravity Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Gravity Techniques Details Activities (0) Areas (0) Regions (0) NEPA(1) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Gravity Techniques Parent Exploration Technique: Geophysical Techniques Information Provided by Technique Lithology: Distribution of density in the subsurface enables inference of rock type. Stratigraphic/Structural: Delineation of steeply dipping formations, geological discontinuities and faults, intrusions and the deposition of silicates due to hydrothermal activity. Hydrological: Density of sedimentary rocks are strongly influenced by fluid contained within pore space. Dry bulk density refers to the rock with no moisture, while the wet bulk density accounts for water saturation; fluid content may alter density by up to 30%.(Sharma, 1997)

303

Observations of Circumstellar Disks  

E-Print Network (OSTI)

The imaging of disks around young stars presents extreme challenges in high dynamic range, angular resolution, and sensitivity. Recent instrumental advances have met these challenges admirably, leading to a marked increase in imaging discoveries. These have opened up a new era in studies of the origin of planetary systems. Questions about our own solar system's formation, and of the prevalence of extra-solar planets, are now addressed with complementary techniques at different wavelengths. Optical and near-infrared images detail scattered light from disks at the highest possible resolution. Mid-infrared, sub-millimeter, and millimeter-wave techniques probe thermal dust continuum radiation. Millimeter-wave interferometry details the small-scale structure of the molecular gas. Kinematic imaging studies affirm the disk interpretation of mm-wave continuum surveys, and the high incidence rate for solar nebula analogs. Inner holes, azimuthal asymmetries, and gaps suggest the presence of underlying planetary bodies. The combined techniques provide a multi-dimensional picture of disks in time and have strengthened our understanding of the connection between disks and planets. Future progress is assured by the presence of much-improved imaging capability looming on the horizon.

David W. Koerner

2001-03-28T23:59:59.000Z

304

Long-term monitoring of ULF electromagnetic fields at Parkfield, CA  

SciTech Connect

Electric and magnetic fields in the (10{sup -4}-1.0) Hz band were monitored at two sites adjacent to the San Andreas Fault near Parkfield and Hollister, California from 1995 to present. A data window [2002-2005], enclosing the September 28, 2004 M6 Parkfield earthquake, was analyzed to determine if anomalous electric or magnetic fields, or changes in ground conductivity, occurred before the earthquake. The data were edited, removing intervals of instrument malfunction leaving 875 days in the four-year period. Frequent, spike-like disturbances were common, but were not more frequent around the time of the earthquake; these were removed before subsequent processing. Signal to noise amplitude spectra, estimated via magnetotelluric processing showed the behavior of the ULF fields to be remarkably constant over the period of analysis. These first-order plots make clear that most of the recorded energy is coherent over the spatial extent of the array. Three main statistical techniques were employed to separate local anomalous electrical or magnetic fields from the dominant coherent natural fields: transfer function estimates between components at each site were employed to subtract the dominant field, and look deeper at the 'residual' fields; the data were decomposed into principal components to identify the dominant coherent array modes; and the technique of canonical coherences was employed to distinguish anomalous fields which are spatially broad from anomalies which occur at a single site only, and furthermore to distinguish anomalies which are present in both the electric and magnetic fields from those which are present in only one field type. Standard remote reference apparent resistivity estimates were generated daily at Parkfield. A significant seasonal component of variability was observed suggesting local distortion due to variations in near surface resistance. In all cases, high levels of sensitivity to subtle electromagnetic effects were demonstrated, but no effects which can be reasonably characterized as precursors to the Parkfield earthquake were found.

Kappler, K.N.; Morrison, H.F.; Egbert, G.D.

2009-08-01T23:59:59.000Z

305

High Field Magnetic Resonance Facility  

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

HFMRF Overview HFMRF Overview Section 2-3-1 High Field Magnetic Resonance Facility The High Field Magnetic Resonance Facility (HFMRF) focuses a significant portion of its research on developing a fundamental, molecular-level understanding of biochemical and biological systems and their response to environmental effects. A secondary focus is materials science, including catalysis and chemical mechanisms and processes. Staff and science consultants within this facility offer expertise in the areas of structural biology, solid-state materials characterization, and magnetic resonance imaging (MRI) techniques. Research activities in the HFMRF include: * structure determination of large molecular assemblies such as protein-DNA (normal and damaged DNA) and protein-RNA complexes

306

Gluon field distribution in baryons  

E-Print Network (OSTI)

Methods for revealing the distribution of gluon fields within the three-quark static-baryon potential are presented. In particular, we outline methods for studying the sensitivity of the source on the emerging vacuum response for the three-quark system. At the same time, we explore the possibility of revealing gluon-field distributions in three-quark systems in QCD without the use of gauge-dependent smoothing techniques. Renderings of flux tubes from a preliminary high-statistics study on a 12^3 X 24 lattice are presented.

F. Bissey; F-G. Cao; A. Kitson; B. G. Lasscock; D. B. Leinweber; A. I. Signal; A. G. Williams; J. M. Zanotti

2005-01-05T23:59:59.000Z

307

Electromagnetic Techniques | Open Energy Information  

Open Energy Info (EERE)

form form View source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon » Electromagnetic Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Electromagnetic Techniques Details Activities (0) Areas (0) Regions (0) NEPA(5) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Electrical Techniques Parent Exploration Technique: Electrical Techniques Information Provided by Technique Lithology: Rock composition, mineral and clay content Stratigraphic/Structural: Detection of permeable pathways, fracture zones, faults Hydrological: Resistivity influenced by porosity, grain size distribution, permeability, fluid saturation, fluid type and phase state of the pore water

308

Observation of GRBs with AGILE  

E-Print Network (OSTI)

Since its early phases of operation, the AGILE satellite is observing Gamma Ray Bursts (GRBs) over an energy range potentially spanning six orders of magnitude. In the hard X-ray band the SuperAGILE imager provides localization of about one GRB/month plus the detection of 1-2 GRBs per month out of its field of view. The Mini-Calorimeter detects about one GRB/week in the 350keV - 100MeV energy range, plus several other transients at very short time scales. In fact, the on-board MCAL trigger logic, implemented for the first time on time windows as short as 300 microseconds, is particularly suitable for very short bursts detection. The Gamma-Ray Imaging Detector (GRID), sensitive in the 30MeV - 30GeV range, firmly detected three GRBs (GRB080514B, GRB090401B and GRB090510) plus some other candidates at a lower significance level. Moreover, all GRBs localized by other spacecrafts inside the GRID field of view are currently searched for possible detection, and upper limits are provided. In this paper we review the ...

Marisaldi, M; Costa, E; Cutini, S; Del Monte, E; Donnarumma, I; Evangelista, Y; Feroci, M; Fuschino, F; Galli, M; Giuliani, A; Labanti, C; Lapshov, I; Lazzarotto, F; Lipari, P; Longo, F; Mereghetti, S; Moretti, E; Pacciani, L; Rapisarda, M; Soffitta, P; Tavani, M; Trifoglio, M; Vercellone, S

2009-01-01T23:59:59.000Z

309

Jet Observables Without Jet Algorithms  

E-Print Network (OSTI)

We introduce a new class of event shapes to characterize the jet-like structure of an event. Like traditional event shapes, our observables are infrared/collinear safe and involve a sum over all hadrons in an event, but like a jet clustering algorithm, they incorporate a jet radius parameter and a transverse momentum cut. Three of the ubiquitous jet-based observables---jet multiplicity, summed scalar transverse momentum, and missing transverse momentum---have event shape counterparts that are closely correlated with their jet-based cousins. Due to their "local" computational structure, these jet-like event shapes could potentially be used for trigger-level event selection at the LHC. Intriguingly, the jet multiplicity event shape typically takes on non-integer values, highlighting the inherent ambiguity in defining jets. By inverting jet multiplicity, we show how to characterize the transverse momentum of the n-th hardest jet without actually finding the constituents of that jet. Since many physics applications do require knowledge about the jet constituents, we also build a hybrid event shape that incorporates (local) jet clustering information. As a straightforward application of our general technique, we derive an event-shape version of jet trimming, allowing event-wide jet grooming without explicit jet identification. Finally, we briefly mention possible applications of our method for jet substructure studies.

Daniele Bertolini; Tucker Chan; Jesse Thaler

2013-10-28T23:59:59.000Z

310

Quantum Mechanics Without Observers  

E-Print Network (OSTI)

The measurement problem and the role of observers have plagued quantum mechanics since its conception. Attempts to resolve these have introduced anthropomorphic or non-realist notions into physics. A shift of perspective based upon process theory and utilizing methods from combinatorial games, interpolation theory and complex systems theory results in a novel realist version of quantum mechanics incorporating quasi-local, nondeterministic hidden variables that are compatible with the no-hidden variable theorems and relativistic invariance, and reproduce the standard results of quantum mechanics to a high degree of accuracy without invoking observers.

W. H. Sulis

2013-02-18T23:59:59.000Z

311

Network Observability Transitions  

E-Print Network (OSTI)

In the modeling, monitoring, and control of complex networks, a fundamental problem concerns the comprehensive determination of the state of the system from limited measurements. Using power grids as example networks, we show that this problem leads to a new type of percolation transition, here termed a {\\it network observability transition}, which we solve analytically for the configuration model. We also demonstrate a dual role of the network's community structure, which both facilitates optimal measurement placement and renders the networks substantially more sensitive to `observability attacks'. Aside from their immediate implications for the development of smart grids, these results provide insights into decentralized biological, social, and technological networks.

Yang, Yang; Motter, Adilson E; 10.1103/PhysRevLett.109.258701

2013-01-01T23:59:59.000Z

312

Nuclide-migration field experiments  

Science Conference Proceedings (OSTI)

When considering groundwater flow and radionuclide retention in the complex flow systems that can occur in geologic formations, one has a serious problem in determining if laboratory studies are being performed under conditions appropriate to natural systems. This document is the project plan for a program designed to begin to address these problems. The project is being carried out jointly by the Los Alamos National Laboratory, Sandia National Laboratories, and Argonne National Laboratory. The work has three principal objectives: (1) to develop the experimental, instrumental, and safety techniques necessary to conduct controlled, small-scale radionuclide migration field experiments, including those involving actinides; (2) to use these techniques to define radionuclide migration through rock by performing generic, at-depth experiments under closely monitored conditions; and (3) to determine whether available lithologic, geochemical, and hydrologic properties together with existing or developing transport models are sufficient and appropriate to describe real field conditions.

Erdal, B.R.; Wolfsberg, K.; Johnstone, J.K.; Erickson, K.L.; Friedman, A.M.; Fried, S.; Hines, J.J.

1981-03-01T23:59:59.000Z

313

Definition: Remote Sensing Techniques | Open Energy Information  

Open Energy Info (EERE)

Remote Sensing Techniques Remote Sensing Techniques Jump to: navigation, search Dictionary.png Remote Sensing Techniques Remote sensing utilizes satellite and/or airborne based sensors to collect information about a given object or area. Remote sensing data collection methods can be passive or active. Passive sensors (e.g., spectral imagers) detect natural radiation that is emitted or reflected by the object or area being observed. In active remote sensing (e.g., radar) energy is emitted and the resultant signal that is reflected back is measured.[1] View on Wikipedia Wikipedia Definition Remote sensing is the acquisition of information about an object or phenomenon without making physical contact with the object. In modern usage, the term generally refers to the use of aerial sensor technologies

314

Suppressant: Electric Fields  

Science Conference Proceedings (OSTI)

*. Bookmark and Share. Suppressant:Electric Fields. Fire Extinguishment of Pool Flames by Means of a DC electric Field.. ...

2011-11-04T23:59:59.000Z

315

Videogrammetric Model Deformation Measurement Technique  

Science Conference Proceedings (OSTI)

The theory, methods, and applications of the videogrammetric model deformation (VMD) measurement technique used at NASA for wind tunnel testing are presented. The VMD technique, based on non-topographic photogrammetry, can determine static and dynamic ...

Burner A. W.; Liu Tianshu

2001-07-01T23:59:59.000Z

316

ARM - Field Campaign - Ground-based Cloud Tomography Experiment at SGP  

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

govCampaignsGround-based Cloud Tomography Experiment at SGP govCampaignsGround-based Cloud Tomography Experiment at SGP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Ground-based Cloud Tomography Experiment at SGP 2009.05.26 - 2009.07.17 Lead Scientist : Dong Huang For data sets, see below. Description Knowledge of 3D cloud properties is pressingly needed in many research fields. One of the problems encountered when trying to represent 3D cloud fields in numerical models is that the existing techniques cannot provide necessary observations at the required spatial scale and resolution. We tested a new promising technique for measuring 3D cloud microphysical structure, called cloud microwave tomography, at the Southern Great Plains (SGP) site for one month in late April 2009. Five microwave scanning

317

Internal split field generator  

DOE Patents (OSTI)

A generator includes a coil of conductive material. A stationary magnetic field source applies a stationary magnetic field to the coil. An internal magnetic field source is disposed within a cavity of the coil to apply a moving magnetic field to the coil. The stationary magnetic field interacts with the moving magnetic field to generate an electrical energy in the coil.

Thundat; ,Thomas George (Knoxville, TN); Van Neste, Charles W. (Kingston, TN); Vass, Arpad Alexander (Oak Ridge, TN)

2012-01-03T23:59:59.000Z

318

Opening criteria for accelerated paving techniques  

E-Print Network (OSTI)

Fast track paving or accelerated pavement design is the rapid replacement of portland cement concrete pavement, allowing for the reopening to traffic under specific time requirements. The purpose of this research is to develop opening criteria for accelerated paving and implementing these criteria into a set of guidelines for fast track paving. This report is broken into three specific sections; review of practice, an analysis of field and lab research, and finally design guidelines for the opening criteria for accelerated paving techniques. A review of practice was developed to update the reader on the current "state of the art". This review outlines contruction techniques, fast track mix design, pavement design, and joint design. The analysis of field and lab research provides a synopsis of the experimentation used to develop design guidelines for opening criteria. This section includes crack surveys, coring tests, FWD testing, maturity testing, penetration testing and consistency testing. The design guidelines for early opening criteria provides guidelines for use in intersection design. The guideline outlines requirements for design, design of concrete pavement materials, mixture design, construction considerations, and requirements for opening criteria. This document will update the reader on the subject of fast track paving and the methods used to research it. Finally, with a design guidelines the reader will be able to apply the methods of analysis described in the field and lab testing section to create better pavements more efficiently.

Johnson, Jason Leonard

1993-01-01T23:59:59.000Z

319

Air Showers and Geomagnetic Field  

E-Print Network (OSTI)

The influence of the geomagnetic field on the development of air showers is studied. The well known International Geomagnetic Reference Field was included in the AIRES air shower simulation program as an auxiliary tool to allow calculating very accurate estimations of the geomagnetic field given the geographic coordinates, altitude above sea level and date of a given event. Our simulations indicate that the geomagnetic deflections alter significantly some shower observables like, for example, the lateral distribution of muons in the case of events with large zenith angles (larger than 75 degrees). On the other hand, such alterations seem not to be important for smaller zenith angles. Global observables like total numbers of particles or longitudinal development parameters do not present appreciable dependences on the geomagnetic deflections for all the cases that were studied.

A. Cillis; S. J. Sciutto

1999-07-31T23:59:59.000Z

320

Dose Reduction Techniques  

SciTech Connect

As radiation safety specialists, one of the things we are required to do is evaluate tools, equipment, materials and work practices and decide whether the use of these products or work practices will reduce radiation dose or risk to the environment. There is a tendency for many workers that work with radioactive material to accomplish radiological work the same way they have always done it rather than look for new technology or change their work practices. New technology is being developed all the time that can make radiological work easier and result in less radiation dose to the worker or reduce the possibility that contamination will be spread to the environment. As we discuss the various tools and techniques that reduce radiation dose, keep in mind that the radiological controls should be reasonable. We can not always get the dose to zero, so we must try to accomplish the work efficiently and cost-effectively. There are times we may have to accept there is only so much you can do. The goal is to do the smart things that protect the worker but do not hinder him while the task is being accomplished. In addition, we should not demand that large amounts of money be spent for equipment that has marginal value in order to save a few millirem. We have broken the handout into sections that should simplify the presentation. Time, distance, shielding, and source reduction are methods used to reduce dose and are covered in Part I on work execution. We then look at operational considerations, radiological design parameters, and discuss the characteristics of personnel who deal with ALARA. This handout should give you an overview of what it takes to have an effective dose reduction program.

WAGGONER, L.O.

2000-05-16T23:59:59.000Z

Note: This page contains sample records for the topic "field techniques observation" 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

Techniques in Broadband Interferometry  

SciTech Connect

This is a compilation of my patents issued from 1997 to 2002, generally describing interferometer techniques that modify the coherence properties of broad-bandwidth light and other waves, with applications to Doppler velocimetry, range finding, imaging and spectroscopy. Patents are tedious to read in their original form. In an effort to improve their readability I have embedded the Figures throughout the manuscript, put the Figure captions underneath the Figures, and added section headings. Otherwise I have resisted the temptation to modify the words, though I found many places which could use healthy editing. There may be minor differences with the official versions issued by the US Patent and Trademark Office, particularly in the claims sections. In my shock physics work I measured the velocities of targets impacted by flyer plates by illuminating them with laser light and analyzing the reflected light with an interferometer. Small wavelength changes caused by the target motion (Doppler effect) were converted into fringe shifts by the interferometer. Lasers having long coherence lengths were required for the illumination. While lasers are certainly bright sources, and their collimated beams are convenient to work with, they are expensive. Particularly if one needs to illuminate a wide surface area, then large amounts of power are needed. Orders of magnitude more power per dollar can be obtained from a simple flashlamp, or for that matter, a 50 cent light bulb. Yet these inexpensive sources cannot practically be used for Doppler velocimetry because their coherence length is extremely short, i.e. their bandwidth is much too wide. Hence the motivation for patents 1 & 2 is a method (White Light Velocimetry) for allowing use of these powerful but incoherent lamps for interferometry. The coherence of the illumination is modified by passing it through a preparatory interferometer.

Erskine, D J

2004-01-04T23:59:59.000Z

322

Remote field eddy current inspection  

SciTech Connect

The Remote Field Eddy Current (RFEC) technique uses an internal probe to inspect conducting tubes nondestructively. A coaxial solenoidal exciter, energized with low frequency AC, and detector coils near the inside of the pipe wall are separated by about two pipe diameters to obtain through wall transmission and equal sensitivity to defects on the outside or inside of the pipe wall. Calculation methods are outlined and the voltage plane polar plot signal representation for defect measurement is described. Slit defect interactions in ferromagnetic and non-ferromagnetic tubes are discussed. Defect-induced anomalous fields are interpreted in terms of anomalous source eddy current and missing magnetization defect models. The use of computer animations to represent the time variations of high resolution field measurements and calculations is described.

Atherton, D.L. [Queen`s Univ., Kingston, Ontario (Canada). Dept. of Physics

1995-11-01T23:59:59.000Z

323

Pns dynamo: Theory and observations  

E-Print Network (OSTI)

We briefly review the turbulent mean-field dynamo action in protoneutron stars that are subject to convective and neutron finger instabilities during the early evolutionary phase. By solving the mean-field induction equation with the simplest model of $\\alpha$-quenching we estimate the strength of the generated magnetic field. If the initial period of the protoneutron star is short, then the generated large-scale field is very strong ($> 3 \\times 10^{13}$G) and exceeds the small-scale field at the neutron star surface, while if the rotation is moderate, then the pulsars are formed with more or less standard dipole fields ($< 3 \\times 10^{13}$G) but with surface small-scale magnetic fields stronger than the dipole field. If rotation is very slow, then the mean-field dynamo does not operate, and the neutron star has no global field.

Bonanno, Alfio

2011-01-01T23:59:59.000Z

324

Innovative techniques cut costs in wetlands drilling  

Science Conference Proceedings (OSTI)

This paper reports on an approach to drilling oil and gas wells in sensitive wetlands areas contributed to a savings of over $1.2 million on a three-well, $3 million drilling project in south Louisiana. ARCO Oil and Gas Co. drilled a three-well project in the Bayou Sale field with a truck-mounted workover rig and a modified solids-control system. This smaller equipment eliminated the need to build a large location in the marsh. Traditional drilling techniques require a large drillsite to accommodate all the equipment of a modern drilling complex. However, recently imposed environmental regulations substantially limit, and in some cases prohibit, the use of these conventional techniques for drilling wells in wetlands areas. Based on the potentially huge economic and operational impact on the drilling industry because of these stricter regulations, alternatives to these traditional practices are essential.

Navarro, A.R. (ARCO Oil and Gas Co., Lafayette, LA (US))

1991-10-14T23:59:59.000Z

325

Observation and Measurement of Solidification Phenomena at High ...  

Science Conference Proceedings (OSTI)

The double hot thermocouple technique (DHTT) that can be used to study .... and the cell-tip stability observed in Fe-83C was in good agreement with the theory...

326

Analysis of Land Skin Temperature Using AVHRR Observations  

Science Conference Proceedings (OSTI)

Using satellite remote sensing techniques to take quantitative observations of the climate system will advance our knowledge and ability to model the climate system and its changes. Polar-orbiting satellite records of global land surface skin ...

Menglin Jin

2004-04-01T23:59:59.000Z

327

Interpretation of Adaptive Observing Guidance for Atlantic Tropical Cyclones  

Science Conference Proceedings (OSTI)

Adaptive observing guidance products for Atlantic tropical cyclones are compared using composite techniques that allow one to quantitatively examine differences in the spatial structures of the guidance maps and relate these differences to the ...

C. A. Reynolds; M. S. Peng; S. J. Majumdar; S. D. Aberson; C. H. Bishop; R. Buizza

2007-12-01T23:59:59.000Z

328

Fundamentals and Techniques of Nonimaging  

DOE Green Energy (OSTI)

This is the final report describing a long term basic research program in nonimaging optics that has led to major advances in important areas, including solar energy, fiber optics, illumination techniques, light detectors, and a great many other applications. The term ''nonimaging optics'' refers to the optics of extended sources in systems for which image forming is not important, but effective and efficient collection, concentration, transport, and distribution of light energy is. Although some of the most widely known developments of the early concepts have been in the field of solar energy, a broad variety of other uses have emerged. Most important, under the auspices of this program in fundamental research in nonimaging optics established at the University of Chicago with support from the Office of Basic Energy Sciences at the Department of Energy, the field has become very dynamic, with new ideas and concepts continuing to develop, while applications of the early concepts continue to be pursued. While the subject began as part of classical geometrical optics, it has been extended subsequently to the wave optics domain. Particularly relevant to potential new research directions are recent developments in the formalism of statistical and wave optics, which may be important in understanding energy transport on the nanoscale. Nonimaging optics permits the design of optical systems that achieve the maximum possible concentration allowed by physical conservation laws. The earliest designs were constructed by optimizing the collection of the extreme rays from a source to the desired target: the so-called ''edge-ray'' principle. Later, new concentrator types were generated by placing reflectors along the flow lines of the ''vector flux'' emanating from lambertian emitters in various geometries. A few years ago, a new development occurred with the discovery that making the design edge-ray a functional of some other system parameter permits the construction of whole new classes of devices with greatly expanded capabilities compared to conventional approaches. These ''tailored edge-ray'' designs have dramatically broadened the range of geometries in which nonimaging optics can provide a significant performance improvement. Considerable progress continues to be made in furthering the incorporation of nonimaging secondaries into practical high concentration and ultra-high concentration solar collector systems. In parallel with the continuing development of nonimaging geometrical optics, our group has been working to develop an understanding of certain fundamental physical optics concepts in the same context. In particular, our study of the behavior of classical radiance in nonimaging systems, has revealed some fundamentally important new understandings that we have pursued both theoretically and experimentally. The field is still relatively new and is rapidly gaining widespread recognition because it fuels many industrial applications. Because of this, during the final years of the project, our group at Chicago has been working more closely with a team of industrial scientists from Science Applications International Corporation (SAIC) at first informally, and later more formally, beginning in 1998, under a formal program initiated by the Department of Energy and incrementally funded through this existing grant. This collaboration has been very fruitful and has led to new conceptual breakthroughs which have provided the foundation for further exciting growth. Many of these concepts are described in some detail in the report.

O'Gallagher, J. J.; Winston, R.

2003-07-10T23:59:59.000Z

329

Inverse Raman effect: applications and detection techniques  

SciTech Connect

The processes underlying the inverse Raman effect are qualitatively described by comparing it to the more familiar phenomena of conventional and stimulated Raman scattering. An experession is derived for the inverse Raman absorption coefficient, and its relationship to the stimulated Raman gain is obtained. The power requirements of the two fields are examined qualitatively and quantitatively. The assumption that the inverse Raman absorption coefficient is constant over the interaction length is examined. Advantages of the technique are discussed and a brief survey of reported studies is presented.

Hughes, L.J. Jr.

1980-08-01T23:59:59.000Z

330

Observation of the sling effect  

E-Print Network (OSTI)

When cloud particles are small enough, they move with the turbulent air in the cloud. On the other hand, as particles become larger their inertia affects their motions, and they move differently than the air. These inertial dynamics impact cloud evolution and ultimately climate prediction, since clouds govern the earth's energy balances. Yet we lack a simple description of the dynamics. Falkovich et al. describes theoretically a new dynamical mechanism called the "sling effect" by which extreme events in the turbulent air cause idealized inertial cloud particles to break free from the airflow (Falkovich G, Fouxon A, Stepanov MG 2002 Nature 419, 151). The sling effect thereafter causes particle trajectories to cross each other within isolated pockets in the flow, which increases the chance of collisions that form larger particles. We combined experimental techniques that allow for precise control of a turbulent flow with three-dimensional tracking of multiple particles at unprecedented resolution. In this way, we could observe both the sling effect and crossing trajectories between real particles. We isolated the inertial sling dynamics from those caused by turbulent advection by conditionally averaging the data. We found the dynamics to be universal in terms of a local Stokes number that quantifies the local particle velocity gradients. We measured the probability density of this quantity, which shows that sharp gradients become more frequent as the global Stokes number increases. We observed that sharp compressive gradients in the airflow initiated the sling effect, and that thereafter gradients in the particle flow ran away and steepened in a way that produced singularities in the flow in finite time. During this process both the fluid motions and gravity became unimportant. The results underpin a framework for describing a crucial aspect of inertial particle dynamics.

Gregory P. Bewley; Ewe Wei Saw; Eberhard Bodenschatz

2013-12-10T23:59:59.000Z

331

Electromagnetic field radiation model for lightning strokes to tall structures  

SciTech Connect

This paper describes observation and analysis of electromagnetic field radiation from lightning strokes to tall structures. Electromagnetic field waveforms and current waveforms of lightning strokes to the CN Tower have been simultaneously measured since 1991. A new calculation model of electromagnetic field radiation is proposed. The proposed model consists of the lightning current propagation and distribution model and the electromagnetic field radiation model. Electromagnetic fields calculated by the proposed model, based on the observed lightning current at the CN Tower, agree well with the observed fields at 2km north of the tower.

Motoyama, H. [CRIEPI, Tokyo (Japan); Janischewskyj, W.; Hussein, A.M. [Univ. of Toronto, Ontario (Canada); Chisholm, W.A. [Ontario Hydro Technologies, Toronto, Ontario (Canada); Chang, J.S. [McMaster Univ., Hamilton, Ontario (Canada); Rusan, R.

1996-07-01T23:59:59.000Z

332

Property:FieldProcedures | Open Energy Information  

Open Energy Info (EERE)

FieldProcedures FieldProcedures Jump to: navigation, search Property Name FieldProcedures Property Type Text Description Description of actions, equipment and footprint of the exploration activity Subproperties This property has the following 39 subproperties: A Active Seismic Techniques Airborne Gravity Survey Audio-Magnetotellurics C Controlled Source Audio MT Cross-Dipole Acoustic Log D DC Resistivity Survey (Dipole-Dipole Array) DC Resistivity Survey (Mise-Á-La-Masse) DC Resistivity Survey (Pole-Dipole Array) DC Resistivity Survey (Schlumberger Array) DC Resistivity Survey (Wenner Array) Development Drilling Direct-Current Resistivity Survey Drilling Techniques E Earth Tidal Analysis Electrical Profiling Configurations Electromagnetic Techniques Exploration Drilling F FMI Log Frequency-Domain Electromagnetic Survey

333

Animation of JILA Frequency Comb Spectroscopy Technique  

Science Conference Proceedings (OSTI)

Animation of JILA Frequency Comb Spectroscopy Technique. The new JILA "frequency comb spectroscopy" technique ...

2012-08-17T23:59:59.000Z

334

Application Guide for Emerging Condition-Monitoring Techniques for Transformers  

Science Conference Proceedings (OSTI)

This Technical Update presents the first year of progress in a multi-year effort toward a complete Application Guide for Emerging Condition-Monitoring Techniques for Transformers.The purpose of this guide is to provide practical assistance to members on the selection, application, and interpretation of emerging transformer condition monitoring. To date, the emerging techniques covered in this guide have had limited application in the field. The guide presents the latest ...

2012-12-20T23:59:59.000Z

335

Observations of Edge Turbulence  

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

Edge Turbulence Edge Turbulence near the X-point of Alcator C-Mod APS-2007 (1) J.L. Terry, S.J. Zweben*, B. LaBombard, I. Cziegler, O. Grulke + , D.P. Stotler* MIT - Plasma Science and Fusion Center *Princeton Plasma Physics Laboratory + MPI for Plasma Physics, EURATOM Assoc., Greifswald, Germany American Physical Society - Div. of Plasma Physics Orlando, FL Nov. 12 - Nov. 16, 2007 APS-2007 (2) Background and Motivation for "Xpt-region" View Strong edge turbulence has been observed in nearly all magnetic confinement devices. Desire predictive capability Most previous measurements made near outboard midplane where the turbulence has the following main features: - generation is ballooning-like (absent at inboard midplane, etc.) - filaments/blobs moves radially outward with some poloidal motion

336

Formation Testing Techniques | Open Energy Information  

Open Energy Info (EERE)

Formation Testing Techniques Formation Testing Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Formation Testing Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Formation Testing Techniques Parent Exploration Technique: Downhole Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Dictionary.png Formation Testing Techniques: No definition has been provided for this term. Add a Definition References No exploration activities found. Print PDF Retrieved from "http://en.openei.org/w/index.php?title=Formation_Testing_Techniques&oldid=601973" Categories: Downhole Techniques Exploration Techniques

337

ARM - Field Campaigns  

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

alpacas clouds-anvil german-scene instrumentfield pye-night racoro-inst rhubc-layout snowy-site twpice-ship walter-annemarie alpacas clouds-anvil german-scene instrumentfield pye-night racoro-inst rhubc-layout snowy-site twpice-ship walter-annemarie How Do I Propose a Campaign? First, review the guidelines for submitting proposals. Next, submit a preproposal; a short summary of the proposed campaign. Wait for a response from the Infrastructure Management Board (IMB) and/or ARM Science Board. A full proposal or science plan, may be requested. Decision is made-now what is expected? ARM Climate Research Facility users regularly conduct field campaigns to augment routine data acquisitions and to test and validate new instruments. Announcements 13 Dec 2013 Now accepting proposals for use of an AMF, AAF, or augment observations at one of our fixed sites. Smaller campaigns in FY2014 and FY2015 can also be

338

Electromagnetic fields in cased borehole  

DOE Green Energy (OSTI)

Borehole electromagnetic (EM) measurements, using fiberglass-cased boreholes, have proven useful in oil field reservoir characterization and process monitoring (Wilt et al., 1995). It has been presumed that these measurements would be impossible in steel-cased wells due to the very large EM attenuation and phase shifts. Recent laboratory and field studies have indicated that detection of EM signals through steel casing should be possible at low frequencies, and that these data provide a reasonable conductivity image at a useful scale. Thus, we see an increased application of this technique to mature oilfields, and an immediate extension to geothermal industry as well. Along with the field experiments numerical model studies have been carried out for analyzing the effect of steel casing to the EM fields. The model used to be an infinitely long uniform casing embedded in a homogeneous whole space. Nevertheless, the results indicated that the formation signal could be accurately recovered if the casing characteristics were independently known (Becker et al., 1998; Lee el al., 1998). Real steel-cased wells are much more complex than the simple laboratory models used in work to date. The purpose of this study is to develop efficient numerical methods for analyzing EM fields in realistic settings, and to evaluate the potential application of EM technologies to cross-borehole and single-hole environment for reservoir characterization and monitoring.

Lee, Ki Ha; Kim, Hee Joon; Uchida, Toshihiro

2001-07-20T23:59:59.000Z

339

Probes of strong-field gravity  

E-Print Network (OSTI)

In this thesis, I investigate several ways to probe gravity in the strong-field regime. These investigations focus on observables from the gravitational dynamics, i.e. when time derivatives are large: thus I focus on sources ...

Stein, Leo Chaim

2012-01-01T23:59:59.000Z

340

Heating Structures of the TRMM Field Campaigns  

Science Conference Proceedings (OSTI)

Heating profiles calculated from sounding networks and other observations during three Tropical Rainfall Measuring Mission (TRMM) field campaigns [the Kwajalein Experiment (KWAJEX), TRMM Large-Scale BiosphereAtmosphere Experiment in Amazonia (...

Courtney Schumacher; Minghua H. Zhang; Paul E. Ciesielski

2007-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "field techniques observation" 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

Combined Satellite- and Surface-Based Observations of Clouds  

Science Conference Proceedings (OSTI)

A new method for combining satellite and surface-based cloud observations into a self-consistent three-dimensional field is presented. This method derives the probabilities of the cloud states, which are most consistent with all of the ...

Bryan C. Weare

1999-03-01T23:59:59.000Z

342

An Observational and Prognostic Numerical Investigation of Complex Terrain Dispersion  

Science Conference Proceedings (OSTI)

The Atmospheric Studies in Complex Terrain Program conducted a field experiment at the interface of the Rocky Mountains and the Great Plains in the winter of 1991. Extensive meteorological observations were taken in northeastern Colorado near ...

Gregory S. Poulos; James E. Bossert

1995-03-01T23:59:59.000Z

343

Observations of Liquid Water in Orographic Clouds over Elk Mountain  

Science Conference Proceedings (OSTI)

The relatively simple orographic clouds forming in winter over Elk Mountain, Wyoming provided useful opportunities for field studies of cloud formation and of ice crystal development. In this paper, the observations of cloud droplet populations ...

Marcia K. Politovich; Gabor Vali

1983-05-01T23:59:59.000Z

344

Thermohaline Stratification of the Indonesian Seas: Model and Observations  

Science Conference Proceedings (OSTI)

The Indonesian Throughflow, weaving through complex topography, drawing water from near the division of the North Pacific and South Pacific water mass fields, represents a severe challenge to modeling efforts. Thermohaline observations within the ...

Arnold L. Gordon; Julie L. McClean

1999-02-01T23:59:59.000Z

345

Observed Diurnal Cycle Climatology of Planetary Boundary Layer Height  

Science Conference Proceedings (OSTI)

An observational climatology of the planetary boundary layer height (PBLH) diurnal cycle, specific to surface characteristics, is derived from 58 286 fine-resolution soundings collected in 14 major field campaigns around the world. An objective ...

Shuyan Liu; Xin-Zhong Liang

2010-11-01T23:59:59.000Z

346

A Study of Hail Growth Utilizing Observed Storm Conditions  

Science Conference Proceedings (OSTI)

Hail growth is studied in the Westplains, Colorado, storm for which a variety of observations were collected. Measurements from a triple-Doppler radar network and a penetrating aircraft are used to synthesize fields of liquid water content and ...

G. Brant Foote

1984-01-01T23:59:59.000Z

347

Simulating the Delaware Bay Buoyant Outflow: Comparison with Observations  

Science Conference Proceedings (OSTI)

Coastal buoyant outflows from rivers and estuaries previously have been studied with field research, laboratory experiments, and numerical models. There is a dire need to evaluate model performance in light of coastal current observations. This ...

Michael M. Whitney; Richard W. Garvine

2006-01-01T23:59:59.000Z

348

Airborne Doppler Lidar Observations of Convective Phenomena in Oklahoma  

Science Conference Proceedings (OSTI)

On 30 June 1981, the wind fields around a variety of convective clouds, ranging from large thunderstorm complexes to isolated cumulus congestus, were observed in Oklahoma using an airborne Doppler lidar operated by the National Aeronautics and ...

Eugene W. McCaul Jr.; Howard B. Bluestein; Richard J. Doviak

1987-09-01T23:59:59.000Z

349

Ensemble Kalman Filter Assimilation of Radar Observations of the 8 May 2003 Oklahoma City Supercell: Influences of Reflectivity Observations on Storm-Scale Analyses  

Science Conference Proceedings (OSTI)

Ensemble Kalman filter (EnKF) techniques have been proposed for obtaining atmospheric state estimates on the scale of individual convective storms from radar and other observations, but tests of these methods with observations of real convective ...

David C. Dowell; Louis J. Wicker; Chris Snyder

2011-01-01T23:59:59.000Z

350

External split field generator  

DOE Patents (OSTI)

A generator includes a coil disposed about a core. A first stationary magnetic field source may be disposed on a first end portion of the core and a second stationary magnetic field source may be disposed on a second end portion of core. The first and second stationary magnetic field sources apply a stationary magnetic field to the coil. An external magnetic field source may be disposed outside the coil to apply a moving magnetic field to the coil. Electrical energy is generated in response to an interaction between the coil, the moving magnetic field, and the stationary magnetic field.

Thundat, Thomas George (Knoxville, TN); Van Neste, Charles W. (Kingston, TN); Vass, Arpad Alexander (Oak Ridge, TN)

2012-02-21T23:59:59.000Z

351

Retrieval of Precipitation Profiles from Multiresolution, Multifrequency Active and Passive Microwave Observations  

Science Conference Proceedings (OSTI)

In this study, a technique for estimating vertical profiles of precipitation from multifrequency, multiresolution active and passive microwave observations is investigated. The technique is applicable to the Tropical Rainfall Measuring Mission (...

Mircea Grecu; William S. Olson; Emmanouil N. Anagnostou

2004-04-01T23:59:59.000Z

352

Events and observables in generally invariant spacetime theories  

E-Print Network (OSTI)

We address the problem of observables in generally invariant spacetime theories such as Einstein's general relativity. Using the refined notion of an event as a ``point-coincidence'' between scalar fields that completely characterise a spacetime model, we propose a generalisation of the relational local observables that does not require the existence of four everywhere invertible scalar fields. The collection of all point-coincidences forms in generic situations a four-dimensional manifold, that is naturally identified with the physical spacetime.

Hans Westman; Sebastiano Sonego

2007-08-14T23:59:59.000Z

353

Attenuation of a magnetic field by a superconductor  

Science Conference Proceedings (OSTI)

Observation of magnetic ac field penetration through superconducting tin films has led to the discovery of a 180 phase shift between the magnetic fields on either side of the film under favorable conditions. This result has so far been published ...

K. E. Drangeid; R. Sommerhalder; H. Mller; H. Seitz

1964-01-01T23:59:59.000Z

354

An Observational and Numerical Study of a Sheared, Convective Boundary Layer. Part I: Phoenix II Observations, Statistical Description, and Visualization  

Science Conference Proceedings (OSTI)

Four-dimensional velocity fields derived from dual Doppler radar observations are the basis of a description and statistical analysis of a convective, sheared planetary boundary layer during an afternoon over the High Plains of eastern Colorado. ...

Jeanne M. Schneider; Douglas K. Lilly

1999-09-01T23:59:59.000Z

355

Crosshole EM for oil field characterization and EOR monitoring: Field examples from Lost Hills, California  

SciTech Connect

A steamflood recently initiated by Mobil Development and Production U.S. at the Lost Hills No 3 oil field in California is notable for its shallow depth and the application of electromagnetic (EM) geophysical techniques to monitor the subsurface steam flow. Steam was injected into three stacked eastward-dipping unconsolidated oil sands at depths from 60 to 120 m; the plume is expected to develop as an ellipsoid aligned with the regional northwest-southeast strike. Because of the shallow depth of the sands and the high viscosity of the heavy oil, it is important to track the steam in the unconsolidated sediments for both economic and safety reasons. Crosshole and surface-to-borehole electromagnetic imaging were applied for reservoir characterization and steamflood monitoring. The crosshole EM data were collected to map the interwell distribution of the high-resistivity oil sands and to track the injected steam and hot water. Measurements were made in two fiberglass-cased observation wells straddling the steam injector on a northeast-southwest profile. Field data were collected before the steam drive, to map the distribution of the oil sands, and then 6 and 10 months after steam was injected, to monitor the expansion of the steam chest. Resistivity images derived from the collected data clearly delineated the distribution and dipping structure of the target oil sands. Difference images from data collected before and during steamflooding indicate that the steam chest has developed only in the middle and lower oil sands, and it has preferentially migrated westward in the middle oil sand and eastward in the deeper sand. Surface-to-borehole field data sets at Lost Hills were responsive to the large-scale subsurface structure but insufficiently sensitive to model steam chest development in the middle and lower oil sands. As the steam chest develops further, these data will be of more use for process monitoring.

Wilt, M.; Schenkel, C.; Wratcher, M.; Lambert, I.; Torres-Verdin, C.; Tseng H.W.

1996-07-16T23:59:59.000Z

356

Exploration of volcanic geothermal energy resources based on rheological techniques. First technical status report, April 1, 1978-June 30, 1978  

DOE Green Energy (OSTI)

Initial steps in a physical analytic and field study of the general applicability of the rheidity sensing techniques in the Oregon-Washington Cascade region are listed. (MHR)

Bodvarsson, G.

1978-01-01T23:59:59.000Z

357

Category:Seismic Techniques | Open Energy Information  

Open Energy Info (EERE)

2 subcategories, out of 2 total. A Active Seismic Techniques 2 pages P Passive Seismic Techniques 2 pages Pages in category "Seismic Techniques" The following 2...

358

Definition: Electrical Techniques | Open Energy Information  

Open Energy Info (EERE)

Techniques Jump to: navigation, search Dictionary.png Electrical Techniques Electrical techniques aim to image the electrical resistivity of the subsurface through the measurement...

359

Category:Data Techniques | Open Energy Information  

Open Energy Info (EERE)

Data Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Data Techniques page? For detailed information on Data Techniques...

360

Tsunami effects on the Z component of the geomagnetic field  

E-Print Network (OSTI)

The vertical component (Z) of the geomagnetic field observed by ground-based observatories of the INTERMAGNET network has been used to analyze the effects of the movement of electrically conducting sea water through the geomagnetic field due to a propagation of a tsumani. The purpose of this work is to study the geomagnetic variations induced by the tsunamis occurred at 26 December, 2004, 27 February, 2010 and 11 March, 2011. For each case study, we selected four magnetic stations belonging to the INTERMAGNET programme that were influenced or more direct affected by the tsumani. To detect these disturbances in the geomagnetic data, the discrete wavelet technique have been used in four levels of decomposition. We were able to detect the localized behavior of the geomagnetic variations induced by the movement of electrically conducting sea-water through the geomagnetic field, i. e., the identification of transients related to the tsunamis. As well, using the minutely magnetogram data, it was able to localize th...

Klausner, Virginia; Mendes, Odim; Papa, Andres R R

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "field techniques observation" 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

Forward pruning and other heuristic search techniques in tsume go  

E-Print Network (OSTI)

of years. In this paper we give an overview of techniques that are used in the heuristic search reaching. A global causal interdependence is added through the ko­rule which makes the outcome of a local positions is too big to be stored in any form (with 361 fields being either empty, white or black an upper

Wolf, Thomas

362

Twistor inspired techniques in QCD  

Science Conference Proceedings (OSTI)

I present a short review of the new twistor inspired techniques in perturbative QCD, which are the result of Witten's conjecture of a duality between twistors and string theory. I give an introduction to the main two tree-level techniques, the BCFW recursion and the CSW formalism, and show how the idea of using on-shell QCD amplitudes evaluated for complex momenta can lead to efficient techniques to perform analytic computations. Finally, I briefly discuss how these ideas can be applied to loop calculations if they are combined to the generalized unitarity approach.

Duhr, C. [Center for Particle Physics and Phenomenology (CP3), Universite catholique de Louvain, B-1348 Louvain-la-Neuve (Belgium)

2008-08-29T23:59:59.000Z

363

Strong planning under partial observability  

Science Conference Proceedings (OSTI)

Rarely planning domains are fully observable. For this reason, the ability to deal with partial observability is one of the most important challenges in planning. In this paper, we tackle the problem of strong planning under partial observability in ... Keywords: Binary decision diagrams, Heuristic search in belief space, Planning in nondeterministic domains, Planning under partial observability, Symbolic model checking

Piergiorgio Bertoli; Alessandro Cimatti; Marco Roveri; Paolo Traverso

2006-04-01T23:59:59.000Z

364

Destabilization of drift waves by a nonuniform radial electric field  

SciTech Connect

It is shown that drift waves can be destabilized in the presence of a nonuniform electrostatic field. This may explain the anomalous diffusion observed in tokamaks.

El-Nadi, A.; Hassan, H.

1982-12-01T23:59:59.000Z

365

Electro-optic techniques in electron beam diagnostics  

Science Conference Proceedings (OSTI)

Electron accelerators such as laser wakefield accelerators, linear accelerators driving free electron lasers, or femto-sliced synchrotrons, are capable of producing femtosecond-long electron bunches. Single-shot characterization of the temporal charge profile is crucial for operation, optimization, and application of such accelerators. A variety of electro-optic sampling (EOS) techniques exists for the temporal analysis. In EOS, the field profile from the electron bunch (or the field profile from its coherent radiation) will be transferred onto a laser pulse co-propagating through an electro-optic crystal. This paper will address the most common EOS schemes and will list their advantages and limitations. Strong points that all techniques share are the ultra-short time resolution (tens of femtoseconds) and the single-shot capabilities. Besides introducing the theory behind EOS, data from various research groups is presented for each technique.

van Tilborg, Jeroen; Toth, Csaba; Matlis, Nicholas; Plateau, Guillaume; Leemans, Wim

2011-06-17T23:59:59.000Z

366

Tools & Techniques for Failure Analysis  

Science Conference Proceedings (OSTI)

Oct 31, 2013 ... Failure Analysis and Prevention: Tools & Techniques for Failure ... As lithium-ion battery technology continues to advance and is adopted in diverse markets, ... fracture origin and an understanding of the fracture event energy.

367

A microsystems enabled field desorption source.  

Science Conference Proceedings (OSTI)

Technologies that have been developed for microelectromechanical systems (MEMS) have been applied to the fabrication of field desorption arrays. These techniques include the use of thick films for enhanced dielectric stand-off, as well as an integrated gate electrode. The increased complexity of MEMS fabrication provides enhanced design flexibility over traditional methods.

Hertz, Kristin L.; Resnick, Paul James; Schwoebel, Paul R. (University of New Mexico, Albuquerque, NM); Holland, Christopher E. (SRI International, Menlo Park, CA); Chichester, David L. (Idaho National Laboratory, Idaho Falls, ID)

2010-07-01T23:59:59.000Z

368

Conceptual Ideas for New Nondestructive UF6 Cylinder Assay Techniques  

SciTech Connect

Nondestructive assay (NDA) measurements of uranium cylinders play an important role in helping the International Atomic Energy Agency (IAEA) safeguard uranium enrichment plants. Traditionally, these measurements have consisted of a scale or load cell to determine the mass of UF{sub 6} in the cylinder combined with a gamma-ray measurement of the 186 keV peak from {sup 235}U to determine enrichment. More recently, Los Alamos National Laboratory (LANL) and Pacific Northwest National Laboratory (PNNL) have developed systems that exploit the passive neutron signal from UF{sub 6} to determine uranium mass and/or enrichment. These include the Uranium Cylinder Assay System (UCAS), the Passive Neutron Enrichment Meter (PNEM), and the Hybrid Enrichment Verification Array (HEVA). The purpose of this report is to provide the IAEA with new ideas on technologies that may or may not be under active development but could be useful for UF{sub 6} cylinder assay. To begin, we have included two feasibility studies of active interrogation techniques. There is a long history of active interrogation in the field of nuclear safeguards, especially for uranium assay. Both of the active techniques provide a direct measure of {sup 235}U content. The first is an active neutron method based on the existing PNEM design that uses a correlated {sup 252}Cf interrogation source. This technique shows great promise for UF{sub 6} cylinder assay and is based on advanced technology that could be implemented in the field in the near term. The second active technique is nuclear resonance fluorescence (NRF). In the NRF technique, a bremsstrahlung photon beam could be used to illuminate the cylinder, and high-resolution gamma-ray detectors would detect the characteristic de-excitation photons. The results of the feasibility study show that under certain measurement geometries, NRF is impractical for UF6 cylinder assay, but the 'grazing transmission' and 'secant transmission' geometries have more potential for this application and should be assessed quantitatively. The next set of techniques leverage scintillator detectors that are sensitive to both neutron and gamma radiation. The first is the BC-523A capture-gated organic liquid scintillator. The detector response from several different neutron energies has been characterized and is included in the study. The BC-523A has not yet been tested with UF{sub 6} cylinders, but the application appears to be well suited for this technology. The second detector type is a relatively new inorganic scintillator called CLYC. CLYC provides a complementary detection approach to the HEVA and PNEM systems that could be used to determine uranium enrichment in UF{sub 6} cylinders. In this section, the conceptual idea for an integrated CLYC-HEVA/PNEM system is explored that could yield more precision and robustness against systemic uncertainties than any one of the systems by itself. This is followed by a feasibility study on using alpha-particle-induced reaction gamma-rays as a way to estimate {sup 234}U abundance in UF{sub 6}. Until now, there has been no readily available estimate of the strength of these reaction gamma-rays. Thick target yields of the chief reaction gammas are computed and show that they are too weak for practical safeguards applications. In special circumstances where long count times are permissible, the 1,275 keV F({alpha},x{gamma}) is observable. Its strength could help verify an operator declaration provided other knowledge is available (especially the age). The other F({alpha},x{gamma}) lines are concealed by the dominant uranium line spectrum and associated continuum. Finally, the last section provides several ideas for electromagnetic and acoustic nondestructive evaluation (NDE) techniques. These can be used to measure cylinder wall thickness, which is a source of systematic uncertainty for gamma-ray-based NDA techniques; characterize the UF{sub 6} filling profile inside the cylinder, which is a source of systematic uncertainty for neutron-based NDA techniques; locate hidden objects inside the cylinder; a

Miller, Karen A. [Los Alamos National Laboratory

2012-05-02T23:59:59.000Z

369

Improving the performance of mass-consistent numerical models using optimization techniques  

DOE Green Energy (OSTI)

This report describes a technique of using a mass-consistent model to derive wind speeds over a microscale region of complex terrain. A serious limitation in the use of these numerical models is that the calculated wind field is highly sensitive to some input parameters, such as those specifying atmospheric stability. Because accurate values for these parameters are not usually known, confidence in the calculated winds is low. However, values for these parameters can be found by tuning the model to existing wind observations within a microscale area. This tuning is accomplished by using a single-variable, unconstrained optimization procedure that adjusts the unknown parameters so that the error between the observed winds and model calculations of these winds is minimized. Model verification is accomplished by using eight sets of hourly averaged wind data. These data are obtained from measurements made at approximately 30 sites covering a wind farm development in the Altamont Pass area. When the model is tuned to a small subset of the 30 sites, an accurate determination of the wind speeds was made for the remaining sites in six of the eight cases. (The two that failed were low wind speed cases.) Therefore, when this technique is used, numerical modeling shows great promise as a tool for microscale siting of wind turbines in complex terrain.

Barnard, J.C.; Wegley, H.L.; Hiester, T.R.

1985-09-01T23:59:59.000Z

370

Well Log Techniques | Open Energy Information  

Open Energy Info (EERE)

Well Log Techniques Well Log Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Well Log Techniques Details Activities (4) Areas (4) Regions (1) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Log Techniques Parent Exploration Technique: Downhole Techniques Information Provided by Technique Lithology: depth and thickness of formations; lithology and porosity can be inferred Stratigraphic/Structural: reservoir thickness, reservoir geometry, borehole geometry Hydrological: permeability and fluid composition can be inferred Thermal: direct temperature measurements; thermal conductivity and heat capacity Dictionary.png Well Log Techniques: Well logging is the measurement of formation properties versus depth in a

371

Summertime Three-Dimensional Wind Field Above Sacramento, California  

Science Conference Proceedings (OSTI)

An observational study of the three-dimensional structure of the wind field over Sacramento, California, is reported. The observations were made with a double-theodolite network during the summer period. Although the topography is relatively ...

L. O. Myrup; D. L. Morgan; R. L. Boomer

1983-02-01T23:59:59.000Z

372

TRIDENT flyer plate Impact technique: comparison to gas gun plate impact technique  

SciTech Connect

This report describes the details of a series of plate impact experiments that were conducted on a gas gun in an effort to validate a new technique for plate impact using the TRIDENT laser to launch thin flyers. The diagnostics fielded were VISAR and identical samples and impactors were used on both platforms. All experimenters agree that the VISAR results should have agreed between the two experimental platforms. The VISAR results did not agree across the platforms and experimenters offer explanations and implications for this outcome.

Darcie D. Koller; George T. Gray III; Sheng-Nian Luo

2009-03-01T23:59:59.000Z

373

An Observing System Experiment for Tropical Cyclone Targeting Techniques Using the Global Forecast System  

Science Conference Proceedings (OSTI)

In 1997, the National Oceanic and Atmospheric Administrations National Hurricane Center and the Hurricane Research Division began operational synoptic surveillance missions with the Gulfstream IV-SP jet aircraft to improve the numerical guidance ...

Sim D. Aberson; Sharanya J. Majumdar; Carolyn A. Reynolds; Brian J. Etherton

2011-03-01T23:59:59.000Z

374

Intercomparison of Nocturnal Lower-Atmospheric Structure Observed with Lidar and Sodar Techniques at Pune, India  

Science Conference Proceedings (OSTI)

Coordinated experiments to study the nocturnal lower atmosphere were conducted on selected nights during April?August 1991 using an argon ion lidar and a Doppler sodar at the Indian Institute of Tropical Meteorology, Pune (1832?N, 7351?E, 559 m ...

P. C. S. Devara; P. Ernest Raj; B. S. Murthy; G. Pandithurai; S. Sharma; K. G. Vernekar

1995-06-01T23:59:59.000Z

375

Quasi-Steady Katabatic Winds on Slopes in Wide Valleys: Hydraulic Theory and Observations  

Science Conference Proceedings (OSTI)

Theoretical and field observational studies on mean velocity and temperature fields of quasi-steady nocturnal downslope (katabatic) flows on sloping surfaces are reported for the case of very wide valleys in the presence of weak synoptic winds. ...

M. Princevac; J. C. R. Hunt; H. J. S. Fernando

2008-02-01T23:59:59.000Z

376

Linking Boundary-Layer Circulations and Surface Processes during FIFE 89. Part I: Observational Analysis  

Science Conference Proceedings (OSTI)

Surface, aircraft, and satellite observations are analyzed for the 21-day 1989 intensive field campaign of the First ISLSCP Field Experiment (FIFE) to determine the effect of precipitation, vegetation, and soil moisture distributions on the ...

Eric A. Smith; Mickey M-K. Wai; Harry J. Cooper; Michael T. Rubes; Ann Hsu

1994-06-01T23:59:59.000Z

377

Observed and Modeled Wind and Water-Level Response from Tropical Storm Marco (1990)  

Science Conference Proceedings (OSTI)

The Hurricane Research Division (HRD) analyzes surface wind fields in tropical storms and hurricanes using surface wind observations and aircraft flight-level wind measurements in the vicinity of the storms. The analyzed surface wind fields for ...

Sam H. Houston; Mark D. Powell

1994-09-01T23:59:59.000Z

378

Surface wave multipath signals in near-field microwave imaging  

Science Conference Proceedings (OSTI)

Microwave imaging techniques are prone to signal corruption from unwanted multipath signals. Near-field systems are especially vulnerable because signals can scatter and reflect from structural objects within or on the boundary of the imaging zone. These ...

Paul M. Meaney; Fridon Shubitidze; Margaret W. Fanning; Maciej Kmiec; Neil R. Epstein; Keith D. Paulsen

2012-01-01T23:59:59.000Z

379

Investigation of the eigenfrequencies of two interacting gas bubbles using the direct-numerical-simulation technique  

E-Print Network (OSTI)

The recent theory regarding the eigenfrequencies of two mutually interacting gas bubbles in an acoustic field is verified numerically. The theory given by Ida [e-Print physics/0111133; (submitted)] predicts the existence of three eigenfrequencies per bubble, which make the phase difference between a bubble's pulsation and an external sound be $\\pi / 2$, while readymade theories predict only two natural frequencies. The direct-numerical-simulation technique, in which the compressible Navier-Stokes equation is selected as the governing equation, is employed for numerical experiments. We investigate the eigenfrequencies by observing the direction of the secondary Bjerknes force acting between pulsating bubbles, which changes as the driving frequency varies. The numerical results show that the theoretical prediction is valid at least in a qualitative sense.

Ida, M

2001-01-01T23:59:59.000Z

380

Simulated Doppler Radar Observations of Inhomogeneous Clouds: Application to the EarthCARE Space Mission  

Science Conference Proceedings (OSTI)

A new simulation technique for spaceborne Doppler radar observations that was developed specifically for inhomogeneous targets is presented. Cloud inhomogeneity affects Doppler observations in two ways. First, line-of-sight velocities within the ...

N. A. J. Schutgens

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "field techniques observation" 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

Chemical Source Inversion Using Assimilated Constituent Observations in an Idealized Two-Dimensional System  

Science Conference Proceedings (OSTI)

A source inversion technique for chemical constituents is presented that uses assimilated constituent observations rather than directly using the observations. The method is tested with a simple model problem, which is a two-dimensional Fourier...

Andrew Tangborn; Robert Cooper; Steven Pawson; Zhibin Sun

2009-09-01T23:59:59.000Z

382

Photovoltaic I-V curve measurement techniques  

SciTech Connect

Performance evaluation of photovoltaic (PV) arrays under actual field conditions provides important feedback to the module design process. One of the principal methods for assessing an array's performance is to plot its current, I, versus voltage, V, curve. Following a brief review of techniques for measuring the I-V curve, a new, capacitive-based approach is presented. It uses a rapid sweep of the I-V curve that substantially reduces the average power transfer between array and load, and in turn, substantially reduces the size and weight of the curve tracer. Both theoretical and practical aspects of the approach are presented for a 10-kW unit. Performance is verified by comparison with I-V curves obtained by using a conventional load. The agreement is found to be excellent. Approximately an order of magnitude reduction in size, weight and power consumption over conventional units was realized with the experimental I-V curve tracer.

Cox, C.H.; Warner, T.H.

1982-08-01T23:59:59.000Z

383

Ground penetrating radar technique to locate coal mining related features: case studies in Texas  

E-Print Network (OSTI)

The goal of this research project is to identify the efficacy of the ground penetrating radar (GPR) technique in locating underground coal mine related subsidence features at Malakoff and Bastrop, Texas. The work at Malakoff has been done in collaboration with the Railroad Commission of Texas (RRC). RRC has been carrying out reclamation of abandoned underground coal mines at Malakoff since the early 1990?s. The history of the specific mining operations (at Malakoff and Bastrop) that took place in the early 1900?s has been difficult to ascertain; therefore, the use of a geophysical techniques like ground penetrating radar to identify hidden voids and potential subsidence features is vital for future reclamation process. Some of the underground mine workings at the field site have collapsed over time affecting the topography by creating sinkholes. GPR data, employing 25 MHz, 50 MHz and 100 MHz frequency antennae, have been collected in common offset patterns and azimuthal pattern. GPR data indicate the mine tunnels possibly connecting existing sinkholes by radargram hyperbolae that correspond with mine openings observed visually or during reclamation. This study also denotes the importance of understanding the variable physical properties of the stratigraphy, which could lead to false alarms by misinterpretation of the radar signals. Natural and man-made above-ground structures cause obstructions in data collection, and hence an optimal design is required for each survey. RRC successfully ground-truthed the data during its reclamation process. In turn, the acquired geophysical data helped to guide the reclamation. At Bastrop, GPR data along with historical documentation led to the conclusion that coal mining did exist in this region but is not a major concern to the immediate stability and safety of the field site. It can be concluded from both the studies that the GPR technique identifies anomalous shafts/tunnels possibly connecting potential failure.

Save, Neelambari R

2004-12-01T23:59:59.000Z

384

Companding technique for high dynamic range measurements using Gafchromic films  

Science Conference Proceedings (OSTI)

Purpose: To introduce a methodology to perform dose measurements using Gafchromic films which can span several decades of dose levels. Methods: The technique is based on a rescaling approach using different films irradiated at different dose levels. This is combined with a registration protocol correcting positioning and scaling factors for each film. The methodology is validated using TLD's for out-of-field doses. Furthermore, two examples are provided using the technique to characterize small sized radiosurgery cones and compared with measurements made with a pinpoint chamber. Results: Excellent agreement with TLD, planning systems and measurement was found. The superior resolution of the film technique was apparent. Conclusions: The authors have introduced a new technique allowing users to quantify very low doses in conjunction with commissioning measurements. The use of film also provides 2D information on beam characteristics in high resolution measurements.

Van den Heuvel, Frank; Crijns, Wouter; Defraene, Gilles [Department of Experimental Radiotherapy, Catholic University of Leuven, Leuven, Belgium B-3000 (Belgium)

2011-12-15T23:59:59.000Z

385

Benefits of the Multiple Echo Technique for Ultrasonic Thickness Testing  

SciTech Connect

Much effort has been put into determining methods to make accurate thickness measurements, especially at elevated temperatures. An accuracy of +/- 0.001 inches is typically noted for commercial ultrasonic thickness gauges and ultrasonic thickness techniques. Codes and standards put limitations on many inspection factors including equipment, calibration tolerance and temperature variations. These factors are important and should be controlled, but unfortunately do not guarantee accurate and repeatable measurements in the field. Most technicians long for a single technique that is best for every situation, unfortunately, there are no 'silver bullets' when it comes to nondestructive testing. This paper will describe and discuss some of the major contributors to measurement error as well as some advantages and limitations of multiple echo techniques and why multiple echo techniques should be more widely utilized for ultrasonic thickness measurements.

Elder, J.; Vandekamp, R.

2011-02-10T23:59:59.000Z

386

1 String field theory  

E-Print Network (OSTI)

This elementary introduction to string field theory highlights the features and the limitations of this approach to quantum gravity as it is currently understood. String field theory is a formulation of string theory as a field theory in space-time with an infinite number of massive fields. Although existing constructions of string field theory require expanding around a fixed choice of space-time background, the theory is in principle background-independent, in the sense that different backgrounds can be realized as different field configurations in the theory. String field theory is the only string formalism developed so far which, in principle, has the potential to systematically address questions involving multiple asymptotically distinct string backgrounds. Thus, although it is not yet well defined as a quantum theory, string field theory may eventually be helpful for understanding questions related to cosmology in string theory. 1.1

W. Taylor

2006-01-01T23:59:59.000Z

387

BUFFERED WELL FIELD OUTLINES  

U.S. Energy Information Administration (EIA) Indexed Site

OIL & GAS FIELD OUTLINES FROM BUFFERED WELLS The VBA Code below builds oil & gas field boundary outlines (polygons) from buffered wells (points). Input well points layer must be a...

388

Field Mapping At Dixie Valley Geothermal Field Area (Smith, Et Al., 2001) |  

Open Energy Info (EERE)

Et Al., 2001) Et Al., 2001) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Field Mapping At Dixie Valley Geothermal Field Area (Smith, Et Al., 2001) Exploration Activity Details Location Dixie Valley Geothermal Field Area Exploration Technique Field Mapping Activity Date Usefulness not indicated DOE-funding Unknown References Richard P. Smith, Kenneth W. Wisianz, David D. BlackweIl (2001) Geologic And Geophysical Evidence For Intra-Basin And Footwall Faulting At Dixie Valley, Nevada Retrieved from "http://en.openei.org/w/index.php?title=Field_Mapping_At_Dixie_Valley_Geothermal_Field_Area_(Smith,_Et_Al.,_2001)&oldid=510735" Category: Exploration Activities What links here Related changes Special pages Printable version Permanent link

389

Monthly Temperature Observations for Uganda  

Science Conference Proceedings (OSTI)

The International Surface Temperature Initiative is a worldwide effort to locate weather observations, digitize them for public access, and attach provenance to them. As part of that effort, this study sought documents of temperature observations ...

John R. Christy

2013-10-01T23:59:59.000Z

390

Marine Observations of Old Weather  

Science Conference Proceedings (OSTI)

Weather observations are vital for climate change monitoring and prediction. For the world's oceans, there are many meteorological and oceanographic observations available back to the mid-twentieth century, but coverage is limited in earlier ...

Philip Brohan; Rob Allan; J. Eric Freeman; Anne M. Waple; Dennis Wheeler; Clive Wilkinson; Scott Woodruff

2009-02-01T23:59:59.000Z

391

Ensemble Transformation and Adaptive Observations  

Science Conference Proceedings (OSTI)

Suppose that the geographical and temporal resolution of the observational network could be changed on a daily basis. Of all the possible deployments of observational resources, which particular deployment would minimize expected forecast error? ...

Craig H. Bishop; Zoltan Toth

1999-06-01T23:59:59.000Z

392

Stratospheric Satellites for Earth Observations  

Science Conference Proceedings (OSTI)

Advanced, robust, yet inexpensive observational platforms and networks of platforms will make revolutionary Earth science observations possible in the next 30 years. One new platform concept that is needed is a long-duration stratospheric balloon ...

Alexey Pankine; Kerry Nock; Zhanqing Li; David Parsons; Michael Purucker; Warren Wiscombe; Elliot Weinstock

2009-08-01T23:59:59.000Z

393

Electromagnetic Sounding Techniques | Open Energy Information  

Open Energy Info (EERE)

Electromagnetic Sounding Techniques Electromagnetic Sounding Techniques (Redirected from Electromagnetic Sounding Methods) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Electromagnetic Sounding Techniques Details Activities (1) Areas (1) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Electrical Techniques Parent Exploration Technique: Ground Electromagnetic Techniques Information Provided by Technique Lithology: Rock composition, mineral and clay content Stratigraphic/Structural: Detection of permeable pathways, fracture zones, faults Hydrological: Resistivity influenced by porosity, grain size distribution, permeability, fluid saturation, fluid type and phase state of the pore water

394

Remote Sensing Techniques | Open Energy Information  

Open Energy Info (EERE)

Remote Sensing Techniques Remote Sensing Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Remote Sensing Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Remote Sensing Techniques Exploration Sub Group: None Parent Exploration Technique: Exploration Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Dictionary.png Remote Sensing Techniques: Remote sensing utilizes satellite and/or airborne based sensors to collect information about a given object or area. Remote sensing data collection methods can be passive or active. Passive sensors (e.g., spectral imagers) detect natural radiation that is emitted or reflected by the object or area

395

Active Seismic Techniques | Open Energy Information  

Open Energy Info (EERE)

Active Seismic Techniques Active Seismic Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Active Seismic Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Seismic Techniques Parent Exploration Technique: Seismic Techniques Information Provided by Technique Lithology: Rock unit density influences elastic wave velocities. Stratigraphic/Structural: Structural geology- faults, folds, grabens, horst blocks, sedimentary layering, discontinuities, etc. Hydrological: Combining compressional and shear wave results can indicate the presence of fluid saturation in the formation. Thermal: High temperatures and pressure impact the compressional and shear wave velocities.

396

Electromagnetic Profiling Techniques | Open Energy Information  

Open Energy Info (EERE)

Electromagnetic Profiling Techniques Electromagnetic Profiling Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Electromagnetic Profiling Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Electrical Techniques Parent Exploration Technique: Ground Electromagnetic Techniques Information Provided by Technique Lithology: Rock composition, mineral and clay content Stratigraphic/Structural: Detection of permeable pathways, fracture zones, faults Hydrological: Resistivity influenced by porosity, grain size distribution, permeability, fluid saturation, fluid type and phase state of the pore water Thermal: Resistivity influenced by temperature

397

Well Testing Techniques | Open Energy Information  

Open Energy Info (EERE)

Well Testing Techniques Well Testing Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Well Testing Techniques Details Activities (0) Areas (0) Regions (0) NEPA(17) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Testing Techniques Parent Exploration Technique: Downhole Techniques Information Provided by Technique Lithology: Enable estimation of in-situ reservoir elastic parameters Stratigraphic/Structural: Fracture distribution, formation permeability, and ambient tectonic stresses Hydrological: provides information on permeability, location of permeable zones recharge rates, flow rates, fluid flow direction, hydrologic connections, storativity, reservoir pressures, fluid chemistry, and scaling.

398

Ground Electromagnetic Techniques | Open Energy Information  

Open Energy Info (EERE)

Ground Electromagnetic Techniques Ground Electromagnetic Techniques (Redirected from Ground Electromagnetic Methods) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Ground Electromagnetic Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Electrical Techniques Parent Exploration Technique: Electromagnetic Techniques Information Provided by Technique Lithology: Rock composition, mineral and clay content Stratigraphic/Structural: Detection of permeable pathways, fracture zones, faults Hydrological: Resistivity influenced by porosity, grain size distribution, permeability, fluid saturation, fluid type and phase state of the pore water Thermal: Resistivity influenced by temperature

399

Electromagnetic Sounding Techniques | Open Energy Information  

Open Energy Info (EERE)

Electromagnetic Sounding Techniques Electromagnetic Sounding Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Electromagnetic Sounding Techniques Details Activities (1) Areas (1) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Electrical Techniques Parent Exploration Technique: Ground Electromagnetic Techniques Information Provided by Technique Lithology: Rock composition, mineral and clay content Stratigraphic/Structural: Detection of permeable pathways, fracture zones, faults Hydrological: Resistivity influenced by porosity, grain size distribution, permeability, fluid saturation, fluid type and phase state of the pore water Thermal: Resistivity influenced by temperature

400

Borehole Seismic Techniques | Open Energy Information  

Open Energy Info (EERE)

Borehole Seismic Techniques Borehole Seismic Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Borehole Seismic Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Borehole Seismic Techniques Parent Exploration Technique: Downhole Techniques Information Provided by Technique Lithology: Rock unit density influences elastic wave velocities Stratigraphic/Structural: Structural geology- faults, folds, grabens, horst blocks, sedimentary layering, discontinuities, etc Hydrological: Combining compressional and shear wave results can indicate the presence of fluid saturation in the formation Thermal: High temperatures and pressure impact the compressional and shear wave velocities

Note: This page contains sample records for the topic "field techniques observation" 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

Ground Electromagnetic Techniques | Open Energy Information  

Open Energy Info (EERE)

Ground Electromagnetic Techniques Ground Electromagnetic Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Ground Electromagnetic Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Electrical Techniques Parent Exploration Technique: Electromagnetic Techniques Information Provided by Technique Lithology: Rock composition, mineral and clay content Stratigraphic/Structural: Detection of permeable pathways, fracture zones, faults Hydrological: Resistivity influenced by porosity, grain size distribution, permeability, fluid saturation, fluid type and phase state of the pore water Thermal: Resistivity influenced by temperature Dictionary.png

402

Passive Seismic Techniques | Open Energy Information  

Open Energy Info (EERE)

Passive Seismic Techniques Passive Seismic Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Passive Seismic Techniques Details Activities (0) Areas (0) Regions (0) NEPA(4) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Seismic Techniques Parent Exploration Technique: Seismic Techniques Information Provided by Technique Lithology: Rock unit density influences elastic wave velocities. Stratigraphic/Structural: Structural geology- faults, folds, grabens, horst blocks, sedimentary layering, discontinuities, etc. Hydrological: Combining compressional and shear wave results can indicate the presence of fluid saturation in the formation. Thermal: High temperatures and pressure impact the compressional and shear wave velocities.

403

Observation  

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

the large mass of the implies an affinity to Higgs bosons. Within the SM, the Higgs boson is related to the mechanism by which the quarks, leptons and force-carrying gauge...

404

Far field acceleration  

SciTech Connect

Far fields are propagating electromagnetic waves far from their source, boundary surfaces, and free charges. The general principles governing the acceleration of charged particles by far fields are reviewed. A survey of proposed field configurations is given. The two most important schemes, Inverse Cerenkov acceleration and Inverse free electron laser acceleration, are discussed in detail.

Fernow, R.C.

1995-07-01T23:59:59.000Z

405

X-ray Observations of Galaxies: The Importance of Deep High-Resolution Observations  

E-Print Network (OSTI)

X-ray observations of galaxies have grown from a curiosity into a full-fledged field of astronomy. These observations provide unique information on black holes, binary stars, and the hot phase of the ISM, which can be used to constrain the chemical evolution of the Universe, and the joint evolution of galaxies and massive black holes. These exciting results are due in large part to the high-resolution capability of {\\it Chandra}. To follow on {\\it Chandra} and push forward this science past the present capabilities, our community must build a high-resolution (sub-arcsecond) large-area (several square meters) X-ray telescope.

G. Fabbiano

2007-11-05T23:59:59.000Z

406

Flip-flop phenomenon: observations and theory  

E-Print Network (OSTI)

In many active stars the spots concentrate on two permanent active longitudes which are 180 degrees apart. In some of these stars the dominant part of the spot activity changes the longitude every few years. This so-called flip-flop phenomenon has up to now been reported in 11 stars, both single and binary alike, and including also the Sun. To explain this phenomenon, a non-axisymmetric dynamo mode, giving rise to two permanent active longitudes at opposite stellar hemispheres, is needed together with an oscillating axisymmetric magnetic field. Here we discuss the observed characteristics of the flip-flop phenomenon and present a dynamo solution to explain them.

D. Elstner; H. Korhonen

2005-01-17T23:59:59.000Z

407

APS 7-BM Beamline: Techniques  

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

Motivation Motivation The major thrust of the 7-BM beamline is the application of synchrotron radiation tools to examine complex fluid flowfields. Two major techniques are applied: radiography and x-ray fluorescence spectroscopy. While optical techniques are often ideally suited to the study of fluid flowfields, there are certain flowfields for which optical diagnostics have significant challenges. These include: Multiphase flows: Visible light interacts strongly with phase boundaries. This leads to strong refraction, scattering, and attenuation of light. These effects hinder quantitative measurements of dense multiphase flowfields. Opaque media. Flows with strong refractive effects. Luminous flames: The strong light emission from sooting flames can hinder certain optical diagnostics.

408

Erasure Techniques in MRD codes  

E-Print Network (OSTI)

This book is organized into six chapters. The first chapter introduces the basic algebraic structures essential to make this book a self contained one. Algebraic linear codes and their basic properties are discussed in chapter two. In chapter three the authors study the basic properties of erasure decoding in maximum rank distance codes. Some decoding techniques about MRD codes are described and discussed in chapter four of this book. Rank distance codes with complementary duals and MRD codes with complementary duals are introduced and their applications are discussed. Chapter five introduces the notion of integer rank distance codes. The final chapter introduces some concatenation techniques.

W. B. Vasantha Kandasamy; Florentin Smarandache; R. Sujatha; R. S. Raja Durai

2012-05-03T23:59:59.000Z

409

State observer for synchronous motors  

DOE Patents (OSTI)

A state observer driven by measurements of phase voltages and currents for estimating the angular orientation of a rotor of a synchronous motor such as a variable reluctance motor (VRM). Phase voltages and currents are detected and serve as inputs to a state observer. The state observer includes a mathematical model of the electromechanical operation of the synchronous motor. The characteristics of the state observer are selected so that the observer estimates converge to the actual rotor angular orientation and velocity, winding phase flux linkages or currents.

Lang, Jeffrey H. (Waltham, MA)

1994-03-22T23:59:59.000Z

410

Evaluation of flow capture techniques for measuring HVAC grilleairflows  

SciTech Connect

This paper discusses the accuracy of commercially available flow hoods for residential applications. Results of laboratory and field tests indicate these hoods can be inadequate to measure airflows in residential systems, and there can be large measurement discrepancies between different flow hoods. The errors are due to poor calibrations, sensitivity of the hoods to grille airflow non-uniformities, and flow changes from added flow resistance. It is possible to obtain reasonable results using some flow hoods if the field tests are carefully done, the grilles are appropriate, and grille location does not restrict flow hood placement. We also evaluated several simple flow capture techniques for measuring grille airflows that could be adopted by the HVAC industry and homeowners as simple diagnostics. These simple techniques can be as accurate as commercially available devices. Our test results also show that current calibration procedures for flow hoods do not account for field application problems. As a result, agencies such as ASHRAE or ASTM need to develop a new standard for flow hood calibration, along with a new measurement standard to address field use of flow capture techniques.

Walker, Iain S.; Wray, Craig P.

2002-11-01T23:59:59.000Z

411

Magnetic field generator  

DOE Patents (OSTI)

A magnetic field generating device provides a useful magnetic field within a specific retgion, while keeping nearby surrounding regions virtually field free. By placing an appropriate current density along a flux line of the source, the stray field effects of the generator may be contained. One current carrying structure may support a truncated cosine distribution, and it may be surrounded by a current structure which follows a flux line that would occur in a full coaxial double cosine distribution. Strong magnetic fields may be generated and contained using superconducting cables to approximate required current surfaces.

Krienin, Frank (Shoreham, NY)

1990-01-01T23:59:59.000Z

412

Knowing which way the wind blows| Weather observation, belief and practice in Native Oklahoma.  

E-Print Network (OSTI)

?? I conducted field interviews and observed and participated in farming and cultural activities to understand how Native American farmers and traditionalists in southwestern Oklahoma (more)

Peppler, Randy A.

2012-01-01T23:59:59.000Z

413

BUFFERED WELL FIELD OUTLINES  

U.S. Energy Information Administration (EIA) Indexed Site

OIL & GAS FIELD OUTLINES FROM BUFFERED WELLS OIL & GAS FIELD OUTLINES FROM BUFFERED WELLS The VBA Code below builds oil & gas field boundary outlines (polygons) from buffered wells (points). Input well points layer must be a feature class (FC) with the following attributes: Field_name Buffer distance (can be unique for each well to represent reservoirs with different drainage radii) ...see figure below. Copy the code into a new module. Inputs: In ArcMap, data frame named "Task 1" Well FC as first layer (layer 0). Output: Polygon feature class in same GDB as the well points FC, with one polygon field record (may be multiple polygon rings) per field_name. Overlapping buffers for the same field name are dissolved and unioned (see figure below). Adds an attribute PCTFEDLAND which can be populated using the VBA

414

Dosimetry tools and techniques for IMRT  

Science Conference Proceedings (OSTI)

Intensity modulated radiation therapy (IMRT) poses a number of challenges for properly measuring commissioning data and quality assurance (QA) radiation dose distributions. This report provides a comprehensive overview of how dosimeters, phantoms, and dose distribution analysis techniques should be used to support the commissioning and quality assurance requirements of an IMRT program. The proper applications of each dosimeter are described along with the limitations of each system. Point detectors, arrays, film, and electronic portal imagers are discussed with respect to their proper use, along with potential applications of 3D dosimetry. Regardless of the IMRT technique utilized, some situations require the use of multiple detectors for the acquisition of accurate commissioning data. The overall goal of this task group report is to provide a document that aids the physicist in the proper selection and use of the dosimetry tools available for IMRT QA and to provide a resource for physicists that describes dosimetry measurement techniques for purposes of IMRT commissioning and measurement-based characterization or verification of IMRT treatment plans. This report is not intended to provide a comprehensive review of commissioning and QA procedures for IMRT. Instead, this report focuses on the aspects of metrology, particularly the practical aspects of measurements that are unique to IMRT. The metrology of IMRT concerns the application of measurement instruments and their suitability, calibration, and quality control of measurements. Each of the dosimetry measurement tools has limitations that need to be considered when incorporating them into a commissioning process or a comprehensive QA program. For example, routine quality assurance procedures require the use of robust field dosimetry systems. These often exhibit limitations with respect to spatial resolution or energy response and need to themselves be commissioned against more established dosimeters. A chain of dosimeters, from secondary standards to field instruments, is established to assure the quantitative nature of the tests. This report is intended to describe the characteristics of the components of these systems; dosimeters, phantoms, and dose evaluation algorithms. This work is the report of AAPM Task Group 120.

Low, Daniel A.; Moran, Jean M.; Dempsey, James F.; Dong Lei; Oldham, Mark [Washington University, St. Louis, Missouri 63110 (United States); University of Michigan, Ann Arbor, Michigan 48109 (United States); Viewray Incorporated, Cleveland, Ohio 44106 (United States); M. D. Anderson Cancer Center, Houston, Texas 77013 (United States); Duke University Medical Center, Durham, North Carolina 27710 (United States)

2011-03-15T23:59:59.000Z

415

Technical education and brainstorming technique  

Science Conference Proceedings (OSTI)

The brainstorming technique used for software projects development is presented as a powerful solution for teaching and research activity in the technical domain. Brainstorming was introduced in the technical domain as an efficient method that was developed ... Keywords: alternative education, brainstorming, design patterns, enneagram, resonance, software engineering

Mircea-Florin Vaida

2007-03-01T23:59:59.000Z

416

Analyzing Regression Test Selection Techniques  

Science Conference Proceedings (OSTI)

AbstractRegression testing is a necessary but expensive maintenance activity aimed at showing that code has not been adversely affected by changes. Regression test selection techniques reuse tests from an existing test suite to test a modified program. ... Keywords: Software maintenance, regression testing, selective retest, regression test selection.

Gregg Rothermel; Mary Jean Harrold

1996-08-01T23:59:59.000Z

417

USE OF ADVANCED DATA PROCESSING TECHNIQUES IN THE IMAGING OF THE COSO  

Open Energy Info (EERE)

USE OF ADVANCED DATA PROCESSING TECHNIQUES IN THE IMAGING OF THE COSO USE OF ADVANCED DATA PROCESSING TECHNIQUES IN THE IMAGING OF THE COSO GEOTHERMAL FIELD Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: USE OF ADVANCED DATA PROCESSING TECHNIQUES IN THE IMAGING OF THE COSO GEOTHERMAL FIELD Details Activities (1) Areas (1) Regions (0) Abstract: During December of 1999, approximately 32 miles of seismic data were acquired within the Coso Geothermal Field, Inyo County, California, as part of a detailed seismic investigation undertaken by the US Navy Geothermal Program Office. Data acquisition was designed to make effective use of advanced data processing methods, which include Optim's proprietary nonlinear velocity optimization technique and pre-stack Kirchhoff migration. The nonlinear optimization technique is used to obtain high

418

Field Verification of Components  

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

different reflectances). The low cost measuring technique uses an infrared light-emitting diode and phototransistor. The result is displayed by illuminating one of three LEDs...

419

Fluorescent lamp with static magnetic field generating means  

DOE Patents (OSTI)

A fluorescent lamp wherein magnetic field generating means (e.g., permanent magnets) are utilized to generate a static magnetic field across the respective electrode structures of the lamp such that maximum field strength is located at the electrode's filament. An increase in efficacy during operation has been observed.

Moskowitz, Philip E. (Peabody, MA); Maya, Jakob (Brookline, MA)

1987-01-01T23:59:59.000Z

420

Fluorescent lamp with static magnetic field generating means  

DOE Patents (OSTI)

A fluorescent lamp wherein magnetic field generating means (e.g., permanent magnets) are utilized to generate a static magnetic field across the respective electrode structures of the lamp such that maximum field strength is located at the electrode's filament. An increase in efficacy during operation has been observed. 2 figs.

Moskowitz, P.E.; Maya, J.

1987-09-08T23:59:59.000Z

Note: This page contains sample records for the topic "field techniques observation" 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

Reconstructing the universe history, from inflation to acceleration, with phantom and canonical scalar fields  

E-Print Network (OSTI)

We consider the reconstruction technique in theories with a single or multiple (phantom and/or canonical) scalar fields. With the help of several examples, it is demonstrated explicitly that the universe expansion history, unifying early-time inflation and late-time acceleration, can be realized in scalar-tensor gravity. This is generalized to the theory of a scalar field coupled non-minimally to the curvature and to a Brans-Dicke-like theory. Different examples of unification of inflation with cosmic acceleration, in which de Sitter, phantom, and quintessence type fields play the fundamental role--in different combinations--are worked out. Specifically, the frame dependence and stability properties of de Sitter space scalar field theory are studied. Finally, for two-scalar theories, the late-time acceleration and early-time inflation epochs are successfully reconstructed, in realistic situations in which the more and more stringent observational bounds are satisfied, using the freedom of choice of the scalar field potential, and of the kinetic factor.

Emilio Elizalde; Shin'ichi Nojiri; Sergei D. Odintsov; Diego Sez-Gmez; Valerio Faraoni

2008-03-09T23:59:59.000Z

422

Rendering for an interactive 360 light field display  

Science Conference Proceedings (OSTI)

We describe a set of rendering techniques for an autostereoscopic light field display able to present interactive 3D graphics to multiple simultaneous viewers 360 degrees around the display. The display consists of a high-speed video projector, a spinning ... Keywords: autostereocopic displays, graphics hardware, image-based rendering, light field, real-time rendering

Andrew Jones; Ian McDowall; Hideshi Yamada; Mark Bolas; Paul Debevec

2007-08-01T23:59:59.000Z

423

Negative Energy Seen By Accelerated Observers  

E-Print Network (OSTI)

The sampled negative energy density seen by inertial observers, in arbitrary quantum states is limited by quantum inequalities, which take the form of an inverse relation between the magnitude and duration of the negative energy. The quantum inequalities severely limit the utilization of negative energy to produce gross macroscopic effects, such as violations of the second law of thermodynamics. The restrictions on the sampled energy density along the worldlines of accelerated observers are much weaker than for inertial observers. Here we will illustrate this with several explicit examples. We consider the worldline of a particle undergoing sinusoidal motion in space in the presence of a single mode squeezed vacuum state of the electromagnetic field. We show that it is possible for the integrated energy density along such a worldline to become arbitrarily negative at a constant average rate. Thus the averaged weak energy condition is violated in these examples.This can be the case even when the particle moves at non-relativistic speeds. We use the Raychaudhuri equation to show that there can be net defocussing of a congruence of these accelerated worldlines. This defocussing is an operational signature of the negative integrated energy density. These results in no way invalidate nor undermine either the validity or utility of the quantum inequalities for inertial observers. In particular, they do not change previous constraints on the production of macroscopic effects with negative energy, e.g., the maintenance of traversable wormholes.

L. H. Ford; Thomas A. Roman

2013-02-12T23:59:59.000Z

424

Definition: Field Sampling | Open Energy Information  

Open Energy Info (EERE)

Field Sampling Field Sampling Jump to: navigation, search Dictionary.png Field Sampling Systematic field sampling is critical for reliable characterize a geothermal resource. Some of the physical and chemical properties of rock samples can be estimated by visual inspection, but accurate determination of these properties requires detailed laboratory analysis. Surface or subsurface fluid sampling is also routinely performed to characterize the chemical, thermal, or hydrological properties of a hydrothermal system. Combinations of these sampling techniques have traditionally been used to obtain important information used to determine whether or not a viable power generation or heat utilization facility can be developed at a prospect. Soil sampling is a less commonly used method for exploration of

425

Solution of Nonlinear Finite Difference Ocean Models by Optimization Methods with Sensitivity and Observational Strategy Analysis  

Science Conference Proceedings (OSTI)

Dynamical models driven by observed forcing fields (e.g., the wind) have a true solution uncertainty owing to observational errors in the driving. This uncertainty is usually hidden from view because conventional numerical methods do not easily ...

Jens Schrter; Carl Wunsch

1986-11-01T23:59:59.000Z

426

The Use of Surface Observations in Four-Dimensional Data Assimilation Using a Mesoscale Model  

Science Conference Proceedings (OSTI)

A system for the frequent intermittent assimilation of surface observations into a mesoscale model is described. The assimilation begins by transforming the surface observations to model coordinates. Next, the lowest-level model fields of ...

Frank H. Ruggiero; Keith D. Sashegyi; Rangarao V. Madala; Sethu Raman

1996-05-01T23:59:59.000Z

427

Validation and Interpretation of Adjoint-Derived Sensitivity Steering Vector as Targeted Observation Guidance  

Science Conference Proceedings (OSTI)

The adjoint-derived sensitivity steering vector (ADSSV) has been proposed and applied as a guidance for targeted observation in the field programs for improving tropical cyclone predictability, such as The Observing System Research and ...

Shin-Gan Chen; Chun-Chieh Wu; Jan-Huey Chen; Kun-Hsuan Chou

2011-05-01T23:59:59.000Z

428

Observations of Freezing Drizzle in Extratropical Cyclonic Storms during IMPROVE-2  

Science Conference Proceedings (OSTI)

Observations of supercooled drizzle aloft within two storms impacting the Oregon Cascades during the second Improvement of Microphysical Parameterization through Observational Verification Experiment (IMPROVE-2) field project are presented. The ...

Kyoko Ikeda; Roy M. Rasmussen; William D. Hall; Gregory Thompson

2007-09-01T23:59:59.000Z

429

Gravity quantized: Loop quantum gravity with a scalar field  

Science Conference Proceedings (OSTI)

...''but we do not have quantum gravity.'' This phrase is often used when analysis of a physical problem enters the regime in which quantum gravity effects should be taken into account. In fact, there are several models of the gravitational field coupled to (scalar) fields for which the quantization procedure can be completed using loop quantum gravity techniques. The model we present in this paper consists of the gravitational field coupled to a scalar field. The result has similar structure to the loop quantum cosmology models, except that it involves all the local degrees of freedom of the gravitational field because no symmetry reduction has been performed at the classical level.

Domagala, Marcin; Kaminski, Wojciech [Instytut Fizyki Teoretycznej, Uniwersytet Warszawski, ul. Hoza 69, 00-681 Warszawa (Warsaw), Polska (Poland) (Poland); Giesel, Kristina [Excellence Cluster Universe, Technische Universitaet Muenchen, Boltzmannstrasse 2, 85748 Garching (Germany); Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803 (United States); Lewandowski, Jerzy [Instytut Fizyki Teoretycznej, Uniwersytet Warszawski, ul. Hoza 69, 00-681 Warszawa (Warsaw), Polska (Poland) (Poland); Institute for Gravitation and the Cosmos, Physics Department, Penn State, University Park, Pennsylvania 16802 (United States)

2010-11-15T23:59:59.000Z

430

PRECISION POINTING OF IBEX-Lo OBSERVATIONS  

SciTech Connect

Post-launch boresight of the IBEX-Lo instrument on board the Interstellar Boundary Explorer (IBEX) is determined based on IBEX-Lo Star Sensor observations. Accurate information on the boresight of the neutral gas camera is essential for precise determination of interstellar gas flow parameters. Utilizing spin-phase information from the spacecraft attitude control system (ACS), positions of stars observed by the Star Sensor during two years of IBEX measurements were analyzed and compared with positions obtained from a star catalog. No statistically significant differences were observed beyond those expected from the pre-launch uncertainty in the Star Sensor mounting. Based on the star observations and their positions in the spacecraft reference system, pointing of the IBEX satellite spin axis was determined and compared with the pointing obtained from the ACS. Again, no statistically significant deviations were observed. We conclude that no systematic correction for boresight geometry is needed in the analysis of IBEX-Lo observations to determine neutral interstellar gas flow properties. A stack-up of uncertainties in attitude knowledge shows that the instantaneous IBEX-Lo pointing is determined to within {approx}0.{sup 0}1 in both spin angle and elevation using either the Star Sensor or the ACS. Further, the Star Sensor can be used to independently determine the spacecraft spin axis. Thus, Star Sensor data can be used reliably to correct the spin phase when the Star Tracker (used by the ACS) is disabled by bright objects in its field of view. The Star Sensor can also determine the spin axis during most orbits and thus provides redundancy for the Star Tracker.

Hlond, M.; Bzowski, M. [Space Research Centre of the Polish Academy of Sciences, 18A Bartycka, 00-716 Warsaw (Poland); Moebius, E.; Kucharek, H.; Heirtzler, D.; Schwadron, N. A.; Neill, M. E. O'; Clark, G. [Space Science Center and Department of Physics, University of New Hampshire, Morse Hall, 8 College Road, Durham, NH 03824 (United States); Crew, G. B. [Haystack Observatory, Massachusetts Institute of Technology, Route 40, Westford, MA 01886 (United States); Fuselier, S. [Lockheed Martin, Space Physics Lab, 3251 Hanover Street, Palo Alto, CA 94304 (United States); McComas, D. J., E-mail: mhlond@cbk.waw.pl, E-mail: eberhard.moebius@unh.edu, E-mail: gbc@haystack.mit.edu, E-mail: stephen.a.fuselier@linco.com, E-mail: DMcComas@swri.edu, E-mail: DMcComas@swri.edu [Southwest Research Institute, P.O. Drawer 28510, San Antonio, TX 78228 (United States)

2012-02-01T23:59:59.000Z

431

ARM - Mobile Aerosol Observing System  

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

FacilitiesMobile Aerosol Observing System FacilitiesMobile Aerosol Observing System AMF Information Science Architecture Baseline Instruments AMF1 AMF2 AMF3 Data Operations AMF Fact Sheet Images Contacts AMF Deployments Hyytiälä, Finland, 2014 Manacapuru, Brazil, 2014 Oliktok Point, Alaska, 2013 Los Angeles, California, to Honolulu, Hawaii, 2012 Cape Cod, Massachusetts, 2012 Gan Island, Maldives, 2011 Ganges Valley, India, 2011 Steamboat Springs, Colorado, 2010 Graciosa Island, Azores, 2009-2010 Shouxian, China, 2008 Black Forest, Germany, 2007 Niamey, Niger, 2006 Point Reyes, California, 2005 Mobile Aerosol Observing System Intensive aerosol observations conducted on the campus of Brookhaven National Laboratory on Long Island, New York, using the ARM Mobile Aerosol Observing System. Intensive aerosol observations conducted on the campus of Brookhaven

432

Search for Chameleon Particles Using a Photon-Regeneration Technique  

Science Conference Proceedings (OSTI)

We report the first results from the GammeV search for chameleon particles, which may be created via photon-photon interactions within a strong magnetic field. Chameleons are hypothesized scalar fields that could explain the dark energy problem. We implement a novel technique to create and trap the reflective particles within a jar and to detect them later via their afterglow as they slowly convert back into photons. These measurements provide the first experimental constraints on the couplings of chameleons to photons.

Chou, A. S. [Center for Cosmology and Particle Physics, New York University, 4 Washington Place, New York, New York 10003 (United States); Wester, W.; Baumbaugh, A.; Irizarry-Valle, Y.; Mazur, P. O.; Steffen, J. H.; Tomlin, R.; Yang, X.; Yoo, J. [Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510 (United States); Gustafson, H. R. [Department of Physics, University of Michigan, 450 Church Street, Ann Arbor, Michigan 48109 (United States); Upadhye, A. [Kavli Institute for Cosmological Physics, University of Chicago, Illinois 60637 (United States); Weltman, A. [Department of Applied Mathematics and Theoretical Physics, Cambridge CB2 0WA (United Kingdom); Cosmology and Gravity Group, University of Cape Town, Rondebosch, Private Bag, 7700 (South Africa)

2009-01-23T23:59:59.000Z

433

A search for chameleon particles using a photon regeneration technique  

E-Print Network (OSTI)

We report the first results from the GammeV search for chameleon particles, which may be created via photon-photon interactions within a strong magnetic field. Chameleons are hypothesized scalar fields that could explain the dark energy problem. We implement a novel technique to create and trap the reflective particles within a jar and to detect them later via their afterglow as they slowly convert back into photons. These measurements provide the first experimental constraints on the couplings of chameleons to photons.

A. S. Chou; W. Wester; A. Baumbaugh; H. R. Gustafson; Y. Irizarry-Valle; P. O. Mazur; J. H. Steffen; R. Tomlin; A. Upadhye; A. Weltman; X. Yang; J. Yoo

2008-06-15T23:59:59.000Z

434

Cornman's definition of observation terms  

Science Conference Proceedings (OSTI)

reconcile what is described in mentalistic terms with materialism. ... It is clearly important that the observation terms should not include terms which are...

435

Horizontal Divergence and Vertical Velocity Retrievals from Doppler Radar and Wind Profiler Observations  

Science Conference Proceedings (OSTI)

Vertical motion profiles can be diagnosed with the mass continuity equation using horizontal divergence fields derived from various single-Doppler radar techniques such as EVAD (extended velocity-azimuth display), CEVAD (concurrent extended ...

Robert Cifelli; Steven A. Rutledge; Dennis J. Boccippio; Thomas Matejka

1996-10-01T23:59:59.000Z

436

Observations of the Small-Scale Variability of Precipitation Using an Imaging Radar  

Science Conference Proceedings (OSTI)

For many years, spatial and temporal inhomogeneities in precipitation fields have been studied using scanning radars, cloud radars, and disdrometers, for example. Each measurement technique has its own advantages and disadvantages. Conventional ...

Robert D. Palmer; Boon Leng Cheong; Michael W. Hoffman; Stephen J. Frasier; F. J. Lpez-Dekker

2005-08-01T23:59:59.000Z

437

Aerosol observing system platform integration and AAF instrumentation  

SciTech Connect

As part of the federal governments 2009 American Recovery and Reinvestment Act (ARRA), the U.S. DOE Office of Science allocated funds for the capital upgrade of the Atmospheric Radiation Measurement (ARM) Climate Research Facility to improve and expand observational capabilities related to cloud and aerosol properties. The ARM Facility was established as a national user facility for the global scientific community to conduct a wide range of interdisciplinary science. Part of the ARRA-funded expansion of the ARM Facility includes four new Aerosol Observing Systems (AOS) to be designed, instrumented, and mentored by BNL. The enclosures will be customized SeaTainers. These new platforms ([AMF2]: ARM Mobile Facility-2; [TWP-D]: Tropical Western Pacific at Darwin; and [MAOS-A]/[MAOS-C]: Mobile Aerosol Observing System-Aerosol/-Chemistry) will provide a laboratory environment for fielding instruments to collect data on aerosol life cycle, microphysics, and optical/physical properties. The extensive instrument suite includes both established methods and initial deployments of new techniques to add breadth and depth to the AOS data sets. The platforms are designed: (1) to have all instruments pre-installed before deployment, allowing a higher measurement duty cycle; (2) with a standardized configuration improving the robustness of data inter-comparability; (3) to provide remote access capability for instrument mentors; and (4) to readily accommodate guest instrumentation. The first deployment of the AMF2 platform will be at the upcoming StormVEx campaign held at Steamboat Springs, Colorado, October 15, 2010March 31, 2011 while the TWP-D AOS will be stationed at the ARM Darwin site. The maiden deployments of the MAOS-A and MAOS-C platforms will be during the Ganges Valley Experiment (GVAX) scheduled for April 2011April 2012. In addition to the ground-based AOS platforms, thee major instrument builds for the AAF are also being undertaken (new trace gas package [NO, NOx, NOy, CO, O3, and SO2]; Scanning Mobility Particle Sampler [SMPS]; and Particle into Liquid Sampler [PILS]). The current status of the AOS platforms, instrument suites, instituted QA/QC activities, projected AOS VAPs, and inlet design, as well as still-unresolved issues, will be presented.

Springston, S.; Sedlacek, A.

2010-03-15T23:59:59.000Z

438

Posterior Sampling using Particle Swarm Optimizers and Model Reduction Techniques  

Science Conference Proceedings (OSTI)

Inverse problems are ill-posed and posterior sampling is a way of providing an estimate of the uncertainty based on a finite set of the family of models that fit the observed data within the same tolerance. Monte Carlo methods are used for this purpose ... Keywords: High Dimensional Spaces, Inverse Problems, Model Reduction Techniques, Particle Swarm, Posterior Sampling

J. L. Fernndez Martnez; E. Garca Gonzalo; Z. Fernndez Muiz; G. Mariethoz; T. Mukerji

2010-07-01T23:59:59.000Z

439

The Induced Electric Field Distribution in Solar Atmosphere  

E-Print Network (OSTI)

A method of calculating induced electric field is presented in this paper. Induced electric field in solar atmosphere is derived by the time variation of magnetic field when the charged particle accumulation is neglected. In order to get the spatial distribution of magnetic field, several extrapolation methods are introduced. With observational data from Helioseismic and Magnetic Imager (HMI) aboard the NASA's Solar Dynamics Observatory (SDO) on May 20th, 2010, we extrapolate the magnetic field to the upper atmosphere from the photosphere. By calculating the time variation of magnetic field, we can get the induced electric field. The derived induced electric field can reach a value of 100 V/cm and the average electric field has a maximum point at the layer of 360 km above the photosphere. The Monte Carlo statistics method is used to compute the triple integration of induced electric field.

Chen, Rong; Deng, Yuanyong

2013-01-01T23:59:59.000Z

440

Category:Geophysical Techniques | Open Energy Information  

Open Energy Info (EERE)

Techniques Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Geophysical Techniques page? For detailed information on Geophysical Techniques as exploration techniques, click here. Category:Geophysical Techniques Add.png Add a new Geophysical Techniques Technique Subcategories This category has the following 4 subcategories, out of 4 total. E [+] Electrical Techniques‎ (2 categories) 5 pages G [×] Gravity Techniques‎ 3 pages M [×] Magnetic Techniques‎ 3 pages S [+] Seismic Techniques‎ (2 categories) 2 pages Pages in category "Geophysical Techniques" The following 5 pages are in this category, out of 5 total. D DC Resistivity Survey (Mise-Á-La-Masse) E Electrical Techniques G Gravity Techniques M Magnetic Techniques

Note: This page contains sample records for the topic "field techniques observation" 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

Updated Satellite Technique to Forecast Heavy Snow  

Science Conference Proceedings (OSTI)

Certain satellite interpretation techniques have proven quite useful in the heavy snow forecast process. Those considered best are briefly reviewed, and another technique is introduced. This new technique was found to be most valuable in cyclonic ...

Edward C. Johnston

1995-06-01T23:59:59.000Z

442

Field emission electron source  

DOE Patents (OSTI)

A novel field emitter material, field emission electron source, and commercially feasible fabrication method is described. The inventive field emission electron source produces reliable electron currents of up to 400 mA/cm.sup.2 at 200 volts. The emitter is robust and the current it produces is not sensitive to variability of vacuum or the distance between the emitter tip and the cathode. The novel emitter has a sharp turn-on near 100 volts.

Zettl, Alexander Karlwalter (Kensington, CA); Cohen, Marvin Lou (Berkeley, CA)

2000-01-01T23:59:59.000Z

443

Flip-chip and backside techniques.  

SciTech Connect

State-of-the-art techniques for failure localization and design modification through bulk silicon are essential for multi-level metallization and new, flip chip packaging methods. The tutorial reviews the transmission of light through silicon, sample preparation, and backside defect localization techniques that are both currently available and under development. The techniques covered include emission microscopy, scanning laser microscope based techniques (electrooptic techniques, LIVA and its derivatives), and other non-IR based tools (FIB, e-beam techniques, etc.).

Bernhard-Hofer, Karoline (Infineon, Regensburg, Germany); Barton, Daniel Lee; Cole, Edward Isaac, Jr.

2010-08-01T23:59:59.000Z

444

Quantitative Model of the Cerro Prieto Field  

DOE Green Energy (OSTI)

A three-dimensional model of the Cerro Prieto geothermal field, Mexico, is under development. It is based on an updated version of LBL's hydrogeologic model of the field. It takes into account major faults and their effects on fluid and heat flow in the system. First, the field under natural state conditions is modeled. The results of this model match reasonably well observed pressure and temperature distributions. Then, a preliminary simulation of the early exploitation of the field is performed. The results show that the fluid in Cerro Prieto under natural state conditions moves primarily from east to west, rising along a major normal fault (Fault H). Horizontal fluid and heat flow occurs in a shallower region in the western part of the field due to the presence of permeable intergranular layers. Estimates of permeabilities in major aquifers are obtained, and the strength of the heat source feeding the hydrothermal system is determined.

Halfman, S.E.; Lippmann, M.J.; Bodvarsson, G.S.

1986-01-21T23:59:59.000Z

445

Quantitative model of the Cerro Prieto field  

DOE Green Energy (OSTI)

A three-dimensional model of the Cerro Prieto geothermal field, Mexico, is under development. It is based on an updated version of LBL's hydrogeologic model of the field. It takes into account major faults and their effects on fluid and heat flow in the system. First, the field under natural state conditions is modeled. The results of this model match reasonably well observed pressure and temperature distributions. Then, a preliminary simulation of the early exploitation of the field is performed. The results show that the fluid in Cerro Prieto under natural state conditions moves primarily from east to west, rising along a major normal fault (Fault H). Horizontal fluid and heat flow occurs in a shallower region in the western part of the field due to the presence of permeable intergranular layers. Estimates of permeabilities in major aquifers are obtained, and the strength of the heat source feeding the hydrothermal system is determined.

Halfman, S.E.; Lippmann, M.J.; Bodvarsson, G.S.

1986-03-01T23:59:59.000Z

446

Low background techniques in XMASS  

SciTech Connect

The XMASS project aims to detect pp and {sup 7}Be solar neutrinos, neutrino-less double beta decay, and dark matter searches using ultra-pure liquid xenon. The first stage of XMASS project is concentrated on dark matter searches using 800 kg liquid xenon detector which requires low background and low threshold. Several techniques applied to XMASS detector for low background will be presented.

Takeda, Atsushi [Kamioka Observatory, ICRR, University of Tokyo, 456 Higashi-Mozumi, Kamioka-cho, Hida, Gifu, 506-1205 (Japan)

2011-04-27T23:59:59.000Z

447

Operational dose rate visualization techniques  

SciTech Connect

The analysis of the gamma ray dose rate in the vicinity of a radiation source can be greatly aided by the use of recent state-of-the-art visualization techniques. The method involves calculating dose rates at thousands of locations within a complex geometry system. This information is then processed to create contour plots of the dose rate. Additionally, when these contour plots are created, animations can be created that dynamically display the dose rate as the shields or sources are moved.

Schwarz, R.A.; Morford, R.J.; Carter, L.L.; Jones, G.B.; Greenborg, J.

1994-01-01T23:59:59.000Z

448

Meson Spectrum in Strong Magnetic Fields  

E-Print Network (OSTI)

We study the relativistic quark-antiquark system embedded in magnetic field. The Hamiltonian containing confinement, one gluon exchange and spin-spin interaction is derived. We analytically follow the evolution of the lowest meson states as a functions of MF strength. Calculating the one gluon exchange interaction energy and spin-spin contribution we have observed, that these corrections remain finite at large magnetic fields, preventing the vanishing of the total rho-meson mass at some B_crit, as previously thought. We display the rho masses as functions of magnetic field in comparison with recent lattice data.

M. A. Andreichikov; B. O. Kerbikov; V. D. Orlovsky; Yu. A. Simonov

2013-04-09T23:59:59.000Z

449

Abandoned Texas oil fields  

SciTech Connect

Data for Texas abandoned oil fields were primarily derived from two sources: (1) Texas Railroad Commission (TRRC), and (2) Dwight's ENERGYDATA. For purposes of this report, abandoned oil fields are defined as those fields that had no production during 1977. The TRRC OILMASTER computer tapes were used to identify these abandoned oil fields. The tapes also provided data on formation depth, gravity of oil production, location (both district and county), discovery date, and the cumulative production of the field since its discovery. In all, the computer tapes identified 9211 abandoned fields, most of which had less than 250,000 barrel cumulative production. This report focuses on the 676 abandoned onshore Texas oil fields that had cumulative production of over 250,000 barrels. The Dwight's ENERGYDATA computer tapes provided production histories for approximately two-thirds of the larger fields abandoned in 1966 and thereafter. Fields which ceased production prior to 1966 will show no production history nor abandonment date in this report. The Department of Energy hopes the general availability of these data will catalyze the private sector recovery of this unproduced resource.

1980-12-01T23:59:59.000Z

450

TYPES OF FIELD TESTING  

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

TYPES OF FIELD TESTING Convincing proof of energy savings and performance in a specific building and occupant context If direct proof of savings is desired, the only feasible...

451

Outdoor science field trips.  

E-Print Network (OSTI)

??The purpose of this study was to assess the cognitive and affective values of an outdoor science field trip. Participants were 28 fifth grade students, (more)

Loyd, Kerrie Anne Therese

2004-01-01T23:59:59.000Z

452

Electromagnetic Lorenz Fields  

E-Print Network (OSTI)

Gauge transformations are potential transformations that leave only specific Maxwell fields invariant. To reveal more, I develop Lorenz field equations with full Maxwell form for nongauge, sans gauge function, transformations yielding mixed, superposed retarded and outgoing, potentials. The form invariant Lorenz condition is then a charge conservation equivalent. This allows me to define three transformation classes that screen for Lorenz relevance. The nongauge Lorentz conditions add polarization fields which support emergent, light-like rays that convey energy on charge conserving phase points. These localized rays escape discovery in modern Maxwell fields where the polarizations are suppressed by gauge transformations.

H. C. Potter

2008-10-07T23:59:59.000Z

453

Field-Flow Fractionation of Carbon Nanotubes and Related Materials  

Science Conference Proceedings (OSTI)

During the grant period, we carried out FFF studies of carbonaceous soot, single-walled and multi-walled carbon nanotubes, carbon nano-onions and polyoxometallates. FFF alone does not provide enough information to fully characterize samples, so our suite of characterization techniques grew to include light scattering (especially Photon Correlation Spectroscopy), scanning and transmission electron microscopy, thermogravimetric analysis and spectroscopic methods. We developed convenient techniques to deposit and examine minute FFF fractions by electron microscopy. In collaboration with Arthur Cammers (University of Kentucky), we used Flow Field-Flow Fractionation (Fl-FFF) to monitor the solution-phase growth of keplerates, a class of polyoxometallate (POM) nanoparticles. We monitored the evolution of Mo-POM nanostructures over the course of weeks by by using flow field-flow fractionation and corroborated the nanoparticle structures by using transmission electron microscopy (TEM). Total molybdenum in the solution and precipitate phases was monitored by using inductively coupled plasma analyses, and total Mo-POM concentration by following the UV-visible spectra of the solution phase. We observe crystallization-driven formation of (Mo132) keplerate and solution phase-driven evolution of structurally related nanoscopic species (3-60 nm). FFF analyses of other classes of materials were less successful. Attempts to analyze platelets of layered materials, including exfoliated graphite (graphene) and TaS2 and MoS2, were disappointing. We were not able to optimize flow conditions for the layered materials. The metal sulfides react with the aqueous carrier liquid and settle out of suspension quickly because of their high density.

John P. Selegue

2011-11-17T23:59:59.000Z

454

A study of discrete and continuum joint modeling techniques  

SciTech Connect

This paper presents the results of a numerical and experimental study in which finite element and discrete element techniques were used to analyze a layered polycarbonate plate model subjected to uniaxial compression. Also, the two analysis techniques were used to compute the response of an eight meter diameter drift in jointed-rock. The drift was subjected to in-situ and far-field induced thermal stresses. The finite element analyses used a continuum rock model to represent the jointed-rock. A comparison of the analyses showed that the finite element continuum joint model consistently predicted less joint slippage than did the discrete element analyses, although far-field displacements compared well.

Jung, J.; Brown, S.R.

1992-05-01T23:59:59.000Z

455

Chest radiographs obtained with shaped filters: evaluation by observer performance tests  

SciTech Connect

The effectiveness of a shaped filter in improving nodule and infiltrate detection was measured by observer performance testing. Seven observers read 152 test radiographs of the chest obtained from human volunteers. Half the test radiographs had target image observer performance in detecting nodule or infiltrate images was compared with the shaped-filter system and with a conventional chest imaging system. The results were analyzed using receiver operating characteristic (ROC) techniques and indicate that the filter technique was not significantly different from the conventional technique in infiltrate depiction. Observer performance in detecting nodules was slightly worse on images obtained with the shaped-filter system.

Kelsey, C.A.; Lane, R.G.; Moseley, R.D.; Mettler, F.A.; Rosenberg, R.D.; Williams, A.G.; Garcia, J.F.; Feldman, B.S.; Boardman, R.E.

1986-06-01T23:59:59.000Z

456

A Distinction Technique Between Volcanic And Tectonic Depression Structures  

Open Energy Info (EERE)

Distinction Technique Between Volcanic And Tectonic Depression Structures Distinction Technique Between Volcanic And Tectonic Depression Structures Based On The Restoration Modeling Of Gravity Anomaly- A Case Study Of The Hohi Volcanic Zone, Central Kyushu, Japan Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A Distinction Technique Between Volcanic And Tectonic Depression Structures Based On The Restoration Modeling Of Gravity Anomaly- A Case Study Of The Hohi Volcanic Zone, Central Kyushu, Japan Details Activities (0) Areas (0) Regions (0) Abstract: In this study, we propose a numerical modeling technique which restores the gravity anomaly of tectonic origin and identifies the gravity low of caldera origin. The identification is performed just by comparing the restored gravity anomalies with the observed gravity anomalies, thus we

457

Moored Observations of Precipitation Temperature  

Science Conference Proceedings (OSTI)

Direct observations of precipitation temperature were made from a surface buoy deployed for four months in the western Pacific warm pool. The observed rain droplet temperatures are equal to the wet-bulb temperature to within the measured wet-bulb ...

Steven P. Anderson; Alan Hinton; Robert A. Weller

1998-08-01T23:59:59.000Z

458

Decaying Higgs Fields and Cosmological Dark Energy  

E-Print Network (OSTI)

The observed dark energy in the universe might give particles inertial mass. We investigate one realization of this idea, that the dark energy field might be a decayed scalar component of a supermultiplet field in the early universe that creates inertial mass through spontaneous symmetry breaking, e.g. a Higgs field. To investigate this possibility, the cosmological Friedmann equation of energy balance is augmented in a standard way to incorporate a minimally coupled cosmological Higgs. For epochs where the expansion of the universe is driven by matter and radiation and not the scalar field, the observed hidden nature of the Higgs field can be codified into a single differential equation that we call the "hidden higgs" condition. The resulting differential equation is solved for the time dependant scalar field and a simple and interesting solution is found analytically. Such a Higgs field decays from Planck scale energies rapidly and approximately exponentially from onset, leaving only the initially negligible constant term of the potential as a final cosmological constant. Such evolution replaces the hierarchy problem with the problem of explaining why such evolution is physically justified.

Robert J. Nemiroff; Bijunath Patla

2004-09-27T23:59:59.000Z

459

Category:Electrical Techniques | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Category Edit History Facebook icon Twitter icon » Category:Electrical Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Electrical Techniques page? For detailed information on Electrical Techniques as exploration techniques, click here. Category:Electrical Techniques Add.png Add a new Electrical Techniques Technique Subcategories This category has the following 2 subcategories, out of 2 total. D [+] Direct-Current Resistivity Survey‎ (2 categories) 3 pages E [+] Electromagnetic Techniques‎ (1 categories) 2 pages Pages in category "Electrical Techniques"

460

Definition: Modeling Techniques | Open Energy Information  

Open Energy Info (EERE)

Modeling Techniques Techniques that involve collecting data from one or more sources and developing a comprehensive representation of the data in a model View on...

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461

Parallel radio-wave propagation modeling with image-based ray tracing techniques  

Science Conference Proceedings (OSTI)

Ray tracing is a technique based on the numerical simulation of geometrical optics and the uniform theory of diffraction, two well-known approximate methods for estimating a high-frequency electromagnetic field, based on the ray theory of field propagation. ... Keywords: Load balancing, Message passing interface, Performance evaluation, Radio-wave propagation, Ray tracing, Wireless communications

T. E. Athanaileas; G. E. Athanasiadou; G. V. Tsoulos; D. I. Kaklamani

2010-12-01T23:59:59.000Z

462

Prudhoe Bay Oil Production Optimization: Using Virtual intelligence Techniques, Stage One: Neural Model Building  

E-Print Network (OSTI)

SPE 77659 Prudhoe Bay Oil Production Optimization: Using Virtual intelligence Techniques, Stage One Exploration (Alaska) and Carl D. Sisk SPE, BP Exploration Copyright 2002, Society of Petroleum Engineers Inc, TX 75083-3836, U.S.A., fax 01-972-952-9435. Abstract Field data from the Prudhoe Bay oil field

Mohaghegh, Shahab

463

The inter- and intrafraction reproducibilities of three common IMRT delivery techniques  

Science Conference Proceedings (OSTI)

Purpose: Intensity modulated radiation therapy (IMRT) treatment delivery requires higher precision than conventional 3D treatment delivery because of the sensitivity of the resulting dose to small geometric misalignment of the modulated beamlets. The chosen treatment delivery technique will affect the treatment precision in different ways, based on the characteristics of the delivery method. Delivery using a multileaf collimator (MLC) can reduce treatment time and therapist workload, but typically requires a greater number of monitor units and the fields are prone to both systematic and random leaf positioning errors. An alternative to MLC-based fields, patient specific brass compensators, do not suffer from these leaf positioning errors. In our study, we set out to investigate which delivery method will provide the highest levels of dosimetric reproducibility and the minimum amount of interfraction variability. Methods: In our study, a seven field IMRT plan for a head and neck treatment was created using the Pinnacle{sup 3} treatment planning system and the intensity maps for each field were obtained. The intensity maps of the fields were delivered with a Varian 2100C/D linear accelerator, using solid compensators and sliding window (SW) and step-and-shoot (SS) MLC segments. Three fields were selected from the seven-beam IMRT plan for comparison. Analysis was carried out using the MatriXX ion chamber array, radiochromic film, and Varian dynalog files. Results: Our results show that the error in MLC leaf positioning has no gantry angle dependence. The compensator and SW deliveries showed excellent agreement, even when stricter than usual gamma criteria were applied. However, we noted that under these strict conditions, the SS fields had at least ten times more pixels out of range than did the compensators. When using step-and-shoot MLC fields, it was observed that the increase in dose rate or the increase of MU/segment degrades the quality of the plan. Analysis of the dynalog files showed that while each individual field had its own propensity for error, all fields showed the same trend: a greater percentage of time the leaves are out of position as dose rate increases, MUs decrease, or both. Conclusions: The compensator-based field and both types of MLC-based fields have MatriXX results that are within the clinically acceptable tolerance of 3% dose difference and 2 mm DTA. However, when the criteria are tightened, it becomes evident that the compensators have a definite advantage over their comparable MLC-based competitors in terms of interfraction reproducibility. Fewer monitor units are required to deliver each portal, potentially improving patient outcomes and reducing unwanted side effects to both patients and therapists. In centers without MLC, compensators represent a simple and cost effective way to offer patients state of the art treatment. Based on the results of this study, compensator-based IMRT is a reliable, viable option for use in clinics both with and without MLC-equipped linacs.

Buckey, Courtney R.; Stathakis, Sotirios; Papanikolaou, Niko [Department of Radiology and Department of Radiation Oncology, University of Texas Health Science Center at San Antonio, San Antonio, Texas 78229 (United States)

2010-09-15T23:59:59.000Z

464

Out-of-Field Cell Survival Following Exposure to Intensity-Modulated Radiation Fields  

Science Conference Proceedings (OSTI)

Purpose: To determine the in-field and out-of-field cell survival of cells irradiated with either primary field or scattered radiation in the presence and absence of intercellular communication. Methods and Materials: Cell survival was determined by clonogenic assay in human prostate cancer (DU145) and primary fibroblast (AGO1552) cells following exposure to different field configurations delivered using a 6-MV photon beam produced with a Varian linear accelerator. Results: Nonuniform dose distributions were delivered using a multileaf collimator (MLC) in which half of the cell population was shielded. Clonogenic survival in the shielded region was significantly lower than that predicted from the linear quadratic model. In both cell lines, the out-of-field responses appeared to saturate at 40%-