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Sample records for appendix a4 far-field

  1. Far field acceleration

    International Nuclear Information System (INIS)

    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

  2. 44 CFR Appendix A(4) to Part 61 - Appendix A(4) to Part 61

    Science.gov (United States)

    2010-10-01

    ... notice sent to you in conjunction with the community inspection procedure established under 44 CFR 59.30... procedure set forth in National Flood Insurance Program Regulations (44 CFR 59.30). During the several years... 44 Emergency Management and Assistance 1 2010-10-01 2010-10-01 false Appendix A(4) to Part 61...

  3. Far-field optical superlens.

    Science.gov (United States)

    Liu, Zhaowei; Durant, Stéphane; Lee, Hyesog; Pikus, Yuri; Fang, Nicolas; Xiong, Yi; Sun, Cheng; Zhang, Xiang

    2007-02-01

    Far-field optical lens resolution is fundamentally limited by diffraction, which typically is about half of the wavelength. This is due to the evanescent waves carrying small scale information from an object that fades away in the far field. A recently proposed superlens theory offers a new approach by surface excitation at the negative index medium. We introduce a far-field optical superlens (FSL) that is capable of imaging beyond the diffraction limit. The FSL significantly enhances the evanescent waves of an object and converts them into propagating waves that are measured in the far field. We show that a FSL can image a subwavelength object consisting of two 50 nm wide lines separated by 70 nm working at 377 nm wavelength. The optical FSL promises new potential for nanoscale imaging and lithography. PMID:17298007

  4. Far-field superlens - Optical nanoscope

    OpenAIRE

    Narimanov, Evgenii

    2007-01-01

    Breaking the diffraction limit for the resolution of conventional optical systems has long been the primary aim of optical imaging. The recently demonstrated far-field optical superlens is paving the way to this elusive goal.

  5. Far-field superlens for nanolithography

    International Nuclear Information System (INIS)

    A far-field optical lithography is developed in this paper. By designing the structure of a far-field optical superlens, lithographical resolution can be improved by using a conventional UV light source. The finite different time domain numerical studies indicate that the lithographic resolution at 50 nm line width is achievable with the structure shown in this paper by using 365 nm wavelength light, and the light can be transferred to a far distance in the photoresist

  6. Notions of support for far fields

    Science.gov (United States)

    Sylvester, John

    2006-08-01

    In practical remote sensing, faraway sources radiate fields that, within measurement precision, are nearly those radiated by point sources. Algorithms like MUSIC (Devaney J. Acoust. Soc. Am. at press, Kirsch 2002 Inverse Problems 18 1025-40) correctly identify their number, their locations and their strengths based on observations of the near or far fields they radiate. Asymptotic perturbation formulae (Ammari et al 2005 SIAM J. Appl. Math. 65 2107-27, Brühl et al 2003 Numer. Math. 93 635-54) have been used to successfully locate small sparse inclusions based on remote measurements. The main motivation for this paper is to locate sources which are supported on sets that are larger and less sparse. Although the far field of a solution to the inhomogeneous Helmholtz equation does not determine the source, or its support, uniquely, we will show how to associate with any far field a unique union of well-separated-convex sets (UWSC sets) that is both big enough to support a source that can radiate that far field, and small enough that it must be contained in the UWSC-support of any source that radiates the same far field. This means that it makes theoretical sense to look for not only the number and the locations, but also the convex geometry of sources based on the far field they radiate. The only requirement is that sources be well separated—the diameter of each convex component is strictly smaller than the distance to the other components. We also give examples to illustrate the extent to which both the convexity and well-separated properties in UWSC are necessary, i.e. we will exhibit far fields with which it is not possible to associate a unique smallest compact set or, in {{\\bb R}}^{2} , a unique smallest disjoint union of convex sets.

  7. Optimization of Far-Field Antenna Range

    Directory of Open Access Journals (Sweden)

    O. Cerny

    2015-12-01

    Full Text Available Measurements of test antennas are performed on antenna ranges. The operated microwave far-field outdoor range was built-up in 1970’s and therefore it was not appropriate for the today measurements. Thus, it was decided to perform the complete reconstruction and testing. Some results of new ample measurement campaign are just given. The optimization of antenna range using merely measurement is very inefficient, and therefore that is done by numerical simulations. Consequently the paper surveys briefly electromagnetic wave propagation over irregular terrain. The physical optics approximation of vector problem was chosen. That allows the comparison of selected numerical simulations and measurements for the reconstructed far-field range. A possibility of antenna range optimizing by using numerical simulation considering various constraints is verified.

  8. Far-Field Electron Spectroscopy of Nanoparticles

    OpenAIRE

    Itskovsky, M. A.; Cohen, H.; Maniv, T.

    2007-01-01

    A new type of excitations by highly focused electron beams in scanning transmission electron microscopes is predicted for nanoparticles. The calculated electron energy loss spectra of metallic (silver) and insulating (SiO(sub2)) nanoplatelets reveal dramatic enhancement of radiative electromagnetic modes within the light cone, allowed by the breakdown of momentum conservation in the inelastic scattering event. These modes can be accessed with e-beams in the vacuum far-field zone, similarly to...

  9. Far-field environment working group summary

    Energy Technology Data Exchange (ETDEWEB)

    Pearcy, E.C. [Center for Nuclear Waste Regulatory Analyses, San Antonio, TX (United States); Cady, R.E. [Nuclear Regulatory Commission, Washington, DC (United States)

    1995-09-01

    This article is a summary of the proceedings of a group discussion which took place at the Workshop on the Role of Natural Analogs in Geologic Disposal of High-Level Nuclear Waste in San Antonio, Texas on July 22-25, 1991. The working group concentrated on the subject of the potential impacts of underground disposal of high-level radioactive wastes on the far-field environment.

  10. Actinide chemistry in the far field

    International Nuclear Information System (INIS)

    The environmental chemistry of the actinides is complicated due both to the extensive redox and coordination chemistry of the elements and also to the complexity of the reactive phases encountered in natural environments. In the far field, interactions with reactive surfaces, coatings and colloidal particles will play a crucial role in controlling actinide mobility. By virtue of both their abundance and reactivity; clays and other layer aluminosilicate minerals, hydrous oxides and organic matter (humic substances) are all identified as having the potential to react with actinide ions and some possible modes of interaction are described, together with experimental evidence for their occurrence. (author)

  11. Ultrashort Pulses for Far-Field Nanoscopy

    CERN Document Server

    Maurer, Patrick; Romero-Isart, Oriol

    2016-01-01

    The Abbe diffraction limit prevents focusing monochromatic light in the far-field beyond a spot size half its wavelength. For microscopy purposes at the nanoscale, namely nanoscopy, such limit can be circumvented by either using near-fields, which are not diffraction-limited, or, in fluorescence nanoscopy, by manipulating bright and dark states of the fluorescent markers. Here we propose and analyze an alternative approach for far-field nanoscopy based on using coherent polychromatic light, that is, ultrashort pulses. Such pulses have spectral bandwidths comparable, and even larger in the attosecond regime, than a carrier optical frequency. We show that a train of ultrashort pulses can be used to excite markers with nanoscale resolution. In particular, we show that they can be focused to a spot size given by the wavelength associated to its spectral bandwidth and that they can excite a two-level marker with an optical transition. The excitation mechanism is non-conventional for two-level systems, as it relies...

  12. Far-field optical superlenses without metal

    Science.gov (United States)

    Regan, Charles J.; Dominguez, Daniel; Grave de Peralta, Luis; Bernussi, Ayrton A.

    2013-05-01

    The spatial resolution in traditional optical microscopy is limited by diffraction. This prevents imaging of features with dimensions smaller than half of the wavelength (λ) of the illumination source. Superlenses have been recently proposed and demonstrated to overcome this issue. However, its implementation often involves complex sample fabrication and lossy metal layers. Alternatively, a superlens without metals can be realized using surface waves as the illumination source at the interface between two dielectrics, at the total internal reflection condition, where one of the dielectrics is doped with a fluorescent material. Non-scanning far-field images with resolution of ˜λ/5 and without the need of any post-processing or image reconstruction can be achieved with this approach.

  13. Tuning the far-field superlens: from UV to visible.

    Science.gov (United States)

    Xiong, Yi; Liu, Zhaowei; Durant, Stéphane; Lee, Hyesog; Sun, Cheng; Zhang, Xiang

    2007-06-11

    A far-field optical superlens, which is able to form sub-diffraction- limited images in the far field at UV wavelength, was recently demonstrated. In current work we present two methods to tune the working wavelength from UV to visible by tuning either the permittivity of the surrounding medium or that of the metal. A practical design is provided for each method. The tunable far-field superlens enables possible applications of the far-field superlens in sub-diffraction-limited imaging and sensing over a wide range of wavelength. PMID:19547027

  14. Natural analogs for far-field environment/hydrology

    Energy Technology Data Exchange (ETDEWEB)

    Hoxie, D.T. [Geological Survey, Denver, CO (United States)

    1995-09-01

    This paper discusses the applicability of natural-analog studies to characterize far-field conditions in the vicinity of geologic repository systems for the disposal of high-level radioactive wastes. Conditions in the far field are determined by the natural state and evolution of the repository geosphere and its environment.

  15. Interscale Mixing Microscopy: far field imaging beyond the diffraction limit

    CERN Document Server

    Roberts, Christopher M; Wardley, William P; Inampudi, Sandeep; Dickson, Wayne; Zayats, Anatoly V; Podolskiy, Viktor A

    2016-01-01

    We present an analytical description and an experimental realization of interscale mixing microscopy, a diffraction-based imaging technique that is capable of detecting wavelength/10 objects in far-field measurements with both coherent and incoherent broadband light. This method aims at recovering the spatial spectrum of light diffracted by a subwavelength object based on far-field measurements of the interference created by the object and a finite diffraction grating. A single measurement, analyzing the multiple diffraction orders, is often sufficient to determine the parameters of the object. The presented formalism opens the door for spectroscopy of nanoscale objects in the far-field.

  16. On the Numerical Solution of the Far Field Refractor Problem

    CERN Document Server

    De Leo, Roberto; Mawi, Henok

    2016-01-01

    The far field refractor problem with a discrete target is solved with a numerical scheme that uses and simplify ideas from Caffarelli, Kochengin and Oliker. A numerical implementation is carried out and examples are shown.

  17. Transverse far-field distribution in quantum cascade laser

    OpenAIRE

    A. Hamadoua

    2009-01-01

    In this paper, we perform a transverse far-field calculation for a quantum cascade laser treated as a rectangular waveguide. An analytical method for the solution of integral diffraction equation that describes the transverse far -field in a quantum cascade laser is presented. The equations permitting to calculate the full width at half maximum in both directions, parallel and perpendicular to the growth are determined and compared with reported experimental results.

  18. Spectrally resolved far-fields of terahertz quantum cascade lasers

    CERN Document Server

    Brandstetter, Martin; Krall, Michael; Kainz, Martin A; Detz, Hermann; Zederbauer, Tobias; Andrews, Aaron M; Strasser, Gottfried; Unterrainer, Karl

    2016-01-01

    We demonstrate a convenient and fast method to measure the spectrally resolved far-fields of multimode terahertz quantum cascade lasers by combining a microbolometer focal plane array with an FTIR spectrometer. Far-fields of fundamental TM0 and higher lateral order TM1 modes of multimode Fabry-P\\'erot type lasers have been distinguished, which very well fit to the results obtained by a 3D finite-element simulation. Furthermore, multimode random laser cavities have been investigated, analyzing the contribution of each single laser mode to the total far-field. The presented method is thus an important tool to gain in-depth knowledge of the emission properties of multimode laser cavities at terahertz frequencies, which become increasingly important for future sensing applications.

  19. Adiabatic far-field sub-diffraction imaging

    Science.gov (United States)

    Cang, Hu; Salandrino, Alessandro; Wang, Yuan; Zhang, Xiang

    2015-08-01

    The limited resolution of a conventional optical imaging system stems from the fact that the fine feature information of an object is carried by evanescent waves, which exponentially decays in space and thus cannot reach the imaging plane. We introduce here an adiabatic lens, which utilizes a geometrically conformal surface to mediate the interference of slowly decompressed electromagnetic waves at far field to form images. The decompression is satisfying an adiabatic condition, and by bridging the gap between far field and near field, it allows far-field optical systems to project an image of the near-field features directly. Using these designs, we demonstrated the magnification can be up to 20 times and it is possible to achieve sub-50 nm imaging resolution in visible. Our approach provides a means to extend the domain of geometrical optics to a deep sub-wavelength scale.

  20. Fast far-field calculation in the discrete dipole approximation

    International Nuclear Information System (INIS)

    The discrete dipole approximation is an efficient technique for simulating the field radiated by a particle of any shape. In this approach, the object is viewed as a collection of radiating electric dipoles. The field scattered by the particle is obtained by summing the fields radiated by each dipole. When the particle size is much larger than the wavelength, this technique is time consuming. We propose a Fourier based method which permits a significant reduction of the computation time. - Highlights: • We have dramatically accelerated the computation of scattered far-field in DDA. • We use Fast Fourier Transforms to compute far-field in DDA. • Efficient computation of differential cross-section with DDA

  1. On the Efficiency of Far-Field Wireless Power Transfer

    OpenAIRE

    Xia, Minghua; Aïssa, Sonia

    2015-01-01

    Far-field wireless power transfer (WPT) is a promising technique to resolve the painstaking power-charging problem inherent in various wireless terminals. This paper investigates the power transfer efficiency of the WPT segment in future communication systems in support of simultaneous power and data transfer, by means of analytically computing the time-average output direct current (DC) power at user equipments (UEs). In order to investigate the effect of channel variety among UEs on the ave...

  2. Far-field super-resolution imaging of resonant multiples

    KAUST Repository

    Guo, B.

    2016-05-20

    We demonstrate for the first time that seismic resonant multiples, usually considered as noise, can be used for super-resolution imaging in the far-field region of sources and receivers. Tests with both synthetic data and field data show that resonant multiples can image reflector boundaries with resolutions more than twice the classical resolution limit. Resolution increases with the order of the resonant multiples. This procedure has important applications in earthquake and exploration seismology, radar, sonar, LIDAR (light detection and ranging), and ultrasound imaging, where the multiples can be used to make high-resolution images.

  3. Far-field super-resolution imaging of resonant multiples.

    Science.gov (United States)

    Guo, Bowen; Huang, Yunsong; Røstad, Anders; Schuster, Gerard

    2016-05-01

    We demonstrate for the first time that seismic resonant multiples, usually considered as noise, can be used for super-resolution imaging in the far-field region of sources and receivers. Tests with both synthetic data and field data show that resonant multiples can image reflector boundaries with resolutions more than twice the classical resolution limit. Resolution increases with the order of the resonant multiples. This procedure has important applications in earthquake and exploration seismology, radar, sonar, LIDAR (light detection and ranging), and ultrasound imaging, where the multiples can be used to make high-resolution images. PMID:27386521

  4. Coherence vortices of partially coherent beams in the far field

    Institute of Scientific and Technical Information of China (English)

    Liu Pu-Sheng; Lü Bai-da

    2007-01-01

    Based on the propagation law of cross-spectral density function, studied in this paper are the coherence vortices of partially coherent, quasi-monochromatic singular beams with Gaussian envelope and Schell-model correlator in the far field, where our main attention is paid to the evolution of far-field coherence vortices into intensity vortices of fully coherent beams. The results show that, although there are usually no zeros of intensity in partially coherent beams with Gaussian envelope and Schell-model correlator, zeros of spectral degree of coherence exist. The coherence vortices of spectral degree of coherence depend on the relative coherence length, mode index and positions of pairs of points.If a point and mode index are kept fixed, the position of coherence vortices changes with the increase of the relative coherence length. For the low coherent case there is a circular phase dislocation. In the coherent limit coherence vortices become intensity vortices of fully coherent Laguerre-Gaussian beams.

  5. SPE2 Far-field Seismic Data Quicklook

    Energy Technology Data Exchange (ETDEWEB)

    Mellors, R J; Harben, P; Ford, S; Walter, W R; Hauk, T; Ruppert, S; Pitarka, A; Lewis, J P

    2012-02-14

    The purpose of this report is to provide a brief overview of the far-field seismic data collected by the array of instruments (Figures 1 and 2) deployed by the Source Physics experiment for shots 1 (roughly 100 kg TNT equivalent at a depth of 60 m) and shot 2, (roughly 2000 kg TNT equivalent at a depth of 45 m). 'Far-field' is taken to refer to instruments in the zone of purely elastic response at distances of 100 m or greater. The primary focus is data from the main instrument array and hence data from other groups is not considered. Infrasound data is not addressed nor any remote sensing data. Data processing was done at LLNL in parallel with the effort at UNR. Raw reftek data was sent via hard disk from NsTec. Reftek data was converted to SEGY and then to SAC format. Data files were renamed according to station and channel information. Reftek logs were reviewed. These data have been reviewed for consistency with the UNR data on the server. The primary goal was quality check and a summary is provided in Tables 1 and 2.

  6. Fundamental Bounds on Radio Localization Precision in the Far Field

    CERN Document Server

    Dil, B J; Hoenders, B J

    2015-01-01

    This paper experimentally and theoretically investigates the fundamental bounds on radio localization precision of far-field Received Signal Strength (RSS) measurements. RSS measurements are proportional to power-flow measurements time-averaged over periods long compared to the coherence time of the radiation. Our experiments are performed in a novel localization setup using 2.4GHz quasi-monochromatic radiation, which corresponds to a mean wavelength of 12.5cm. These experiments show for the first time that time-averaged far-field RSS measurements are not independent but cross-correlated over a spatial region. We experimentally and theoretically show that the minimum radius of the cross-correlated region approaches the diffraction limit, which equals half the mean wavelength of the radiation. Measuring RSS beyond a sampling density of one sample per half the mean wavelength is shown not to increase localization precision, as the Root-Mean-Squared-Error (RMSE) converges asymptotically to roughly half the mean ...

  7. Hybrid approach to uncertainty in far-field groundwater flow

    International Nuclear Information System (INIS)

    The quantification of far-field groundwater flow uncertainty is a critical issue regarding site selection for a geologic high-level nuclear waste repository. A nonlinear relationship between geohydrologic parameters (e.g., hydraulic conductivity, potentiometric head, effective porosity) and repository performance measures (e.g., groundwater travel paths or travel times) induces an extremely complex input/output variable response. A hybrid approach involving geostatistics (kriging), adjoint sensitivity, parameter-identification, first-order variance, and Monte Carlo simulation is proposed to determine groundwater flow system uncertainty. The techniques are currently being applied to help select new borehole locations for the site characterization phase of the salt formation investigations by the Salt Repository Project of Nuclear Waste. Preliminary results are presented from two-dimensional simulations of the Wolfcamp Formation within the Permian system

  8. Prediction of the far field noise from wind energy farms

    Science.gov (United States)

    Shepherd, K. P.; Hubbard, H. H.

    1986-01-01

    The basic physical factors involved in making predictions of wind turbine noise and an approach which allows for differences in the machines, the wind energy farm configurations and propagation conditions are reviewed. Example calculations to illustrate the sensitivity of the radiated noise to such variables as machine size, spacing and numbers, and such atmosphere variables as absorption and wind direction are presented. It is found that calculated far field distances to particular sound level contours are greater for lower values of atmospheric absorption, for a larger total number of machines, for additional rows of machines and for more powerful machines. At short and intermediate distances, higher sound pressure levels are calculated for closer machine spacings, for more powerful machines, for longer row lengths and for closer row spacings.

  9. Topological magnetoelectric effects in microwave far-field radiation

    CERN Document Server

    Berezin, M; Shavit, R

    2015-01-01

    Similar to electromagnetism, described by the Maxwell equations, the physics of magnetoelectric (ME) phenomena deals with the fundamental problem of the relationship between electric and magnetic fields. Despite a formal resemblance between the two notions, they concern effects of different natures. In general, ME coupling effects manifest in numerous macroscopic phenomena in solids with space and time symmetry breakings. Recently it was shown that the near fields in the proximity of a small ferrite particle with magnetic dipolar mode (MDM) oscillations have the space and time symmetry breakings and topological properties of these fields are different from topological properties of the free space electromagnetic (EM) fields. Such MDM originated fields, called magnetoelectric (ME) fields, carry both spin and orbital angular momentums. They are characterized by power flow vortices and non zero helicity. In this paper, we report on observation of the topological ME effects in far field microwave radiation based ...

  10. Far-field superresolution by imaging of resonance scattering

    KAUST Repository

    Schuster, Gerard T.

    2014-10-31

    We show that superresolution imaging in the far-field region of the sources and receivers is theoretically and practically possible if migration of resonant multiples is employed. A resonant multiple is one that bounces back and forth between two scattering points; it can also be the multiple between two smoothly varying interfaces as long as the reflection wave paths partially overlap and reflect from the same Fresnel zone. For a source with frequency f, compared to a one-way trip, N round trips in propagating between two scatterers increase the effective frequency by 2N × f and decrease the effective wavelength by λ/(2N). Thus, multiples can, in principle, be used as high-frequency probes to estimate detailed properties of layers. Tests with both synthetic and field data validate this claim. Improved resolution by multiple imaging is not only feasible for crustal reflections, but might be applicable to mantle and core reverberations recorded by earthquake seismologists.

  11. Laser Interferometer Space Antenna (LISA) Far Field Phase Patterns

    Science.gov (United States)

    Waluschka, Eugene; Obenschain, Arthur F. (Technical Monitor)

    2000-01-01

    The Laser Interferometer Space Antenna (LISA) consists of three spacecraft in orbit about the sun. The orbits are chosen such that the three spacecraft are always at (roughly) the vertices of a equilateral triangle with 5 million kilometer leg lengths. Even though the distances between the three spacecraft are 5 million kilometers, the expected phase shifts between any two beams, due to a gravitational wave, only correspond to a distance change of about 10 pico meters, which is about 10(exp -5) waves for a laser wavelength of 1064 nm. To obtain the best signal-to-noise ratio, noise sources such as changes in the apparent distances due to pointing jitter must be controlled carefully. This is the main reason for determining the far-field phase patterns of a LISA type telescope. Because of torque on the LISA spacecraft and other disturbances, continuous adjustments to the pointing of the telescopes are required. These pointing adjustments will be a "jitter" source. If the transmitted wave is perfectly spherical then rotations (Jitter) about its geometric center will not produce any effect at the receiving spacecraft. However, if the outgoing wave is not perfectly spherical, then pointing jitter will produce a phase variation at the receiving spacecraft. The following sections describe the "brute force" computational approach used to determine the scalar wave front as a function of exit pupil (Zernike) aberrations and to show the results (mostly graphically) of the computations. This approach is straightforward and produces believable phase variations to sub-pico meter accuracy over distances on the order of 5 million kilometers. As such this analyzes the far field phase sensitivity to exit pupil aberrations.

  12. Far-field Diffraction Properties of Annular Walsh Filters

    Directory of Open Access Journals (Sweden)

    Pubali Mukherjee

    2013-01-01

    Full Text Available Annular Walsh filters are derived from the rotationally symmetric annular Walsh functions which form a complete set of orthogonal functions that take on values either +1 or −1 over the domain specified by the inner and outer radii of the annulus. The value of any annular Walsh function is taken as zero from the centre of the circular aperture to the inner radius of the annulus. The three values 0, +1, and −1 in an annular Walsh function can be realized in a corresponding annular Walsh filter by using transmission values of zero amplitude (i.e., an obscuration, unity amplitude and zero phase, and unity amplitude and phase, respectively. Not only the order of the Walsh filter but also the size of the inner radius of the annulus provides an additional degree of freedom in tailoring of point spread function by using these filters for pupil plane filtering in imaging systems. In this report, we present the far-field amplitude characteristics of some of these filters to underscore their potential for effective use in several demanding applications like high-resolution microscopy, optical data storage, microlithography, optical encryption, and optical micromanipulation.

  13. On the Efficiency of Far-Field Wireless Power Transfer

    Science.gov (United States)

    Xia, Minghua; Aissa, Sonia

    2015-06-01

    Far-field wireless power transfer (WPT) is a promising technique to resolve the painstaking power-charging problem inherent in various wireless terminals. This paper investigates the power transfer efficiency of the WPT segment in future communication systems in support of simultaneous power and data transfer, by means of analytically computing the time-average output direct current (DC) power at user equipments (UEs). In order to investigate the effect of channel variety among UEs on the average output DC power, different policies for the scheduling of the power transfer among the users are implemented and compared in two scenarios: homogeneous, whereby users are symmetric and experience similar path loss, and heterogeneous, whereby users are asymmetric and exhibit different path losses. Specifically, if opportunistic scheduling is performed among $N$ symmetric/asymmetric UEs, the power scaling laws are attained by using extreme value theory, and reveal that the gain in power transfer efficiency is $\\ln{N}$ if UEs are symmetric whereas the gain is $N$ if UEs are asymmetric, compared with that of conventional round-robin scheduling. Thus, the channel variety among UEs inherent to the wireless environment can be exploited by opportunistic scheduling to significantly improve the power transfer efficiency when designing future wireless communication systems in support of simultaneous power and data transfer.

  14. 14 CFR 417.229 - Far-field overpressure blast effects analysis.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 4 2010-01-01 2010-01-01 false Far-field overpressure blast effects... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION LICENSING LAUNCH SAFETY Flight Safety Analysis § 417.229 Far-field... criteria that protect the public from any hazard associated with far field blast overpressure effects...

  15. 16 CFR Appendix A4 to Part 305 - Refrigerator-Freezers With Automatic Defrost With Top-Mounted Freezer Without Through-the-Door...

    Science.gov (United States)

    2010-01-01

    ... 16 Commercial Practices 1 2010-01-01 2010-01-01 false Refrigerator-Freezers With Automatic Defrost With Top-Mounted Freezer Without Through-the-Door Ice Service A4 Appendix A4 to Part 305 Commercial Practices FEDERAL TRADE COMMISSION REGULATIONS UNDER SPECIFIC ACTS OF CONGRESS RULE CONCERNING DISCLOSURES REGARDING ENERGY CONSUMPTION AND WATER...

  16. Two-dimensional imaging by far-field superlens at visible wavelengths.

    Science.gov (United States)

    Xiong, Yi; Liu, Zhaowei; Sun, Cheng; Zhang, Xiang

    2007-11-01

    We report that two-dimensional (2D) sub-diffraction-limited images can be theoretically reconstructed by a new metamaterial far-field superlens. The metamaterial far-field superlens, composed of a metal-dielectric multilayer and a one-dimensional (1D) subwavelength grating, can work over a broad range of visible wavelengths intrinsically. The imaging principle and the reconstruction process are described in detail. The 2D sub-diffraction-limited imaging ability enables more applications of the far-field superlens in optical nanoimaging and sensing. PMID:17918904

  17. Structural polarization properties of vector Gaussian beam in the far field

    Institute of Scientific and Technical Information of China (English)

    Zhou Guo-Quan; Ni Yong-Zhou; Chu Xiu-Xiang

    2007-01-01

    Based on the vector angular spectrum representation of optical beam and the method of stationary phase, the analytical TE and TM terms of vector Gaussian beam have been presented in the far field. By using the local polarization matrix, the polarization properties of the TE and TM terms in the far field are investigated, and it is found that the degree of their polarization is only determined by the spatial location. When the source is completely polarized, the TE and TM terms are both completely polarized in the far field. When the source is completely unpolarized, the TE and TM terms in the far field are partially polarized. The whole beam is also partially polarized except on the propagating axis. Moreover, the degrees of polarization of TE and TM terms are both larger than that of the whole beam.

  18. Near-Field Optical Transfer Function for Far-Field Super-Resolution Imaging

    International Nuclear Information System (INIS)

    The far-field superlens based on surface plasmon polaritons (SPP) has shown great application potential, but it is difficult and time-consuming to reconstruct the far-field image. We derive a near-field optical transfer function (NOTF) of a silver slab and analyse its validity so that accurate information of nano-scale object in the near-field can be computed rapidly. The NOTF is helpful not only for analysing the super-resolution imaging process in far-field, but also for providing a track to describe the transmission of optical information from near-field to far-field by using the optical transfer functions theory only

  19. Near field to far field transformations and multiple beam forming and steering

    Science.gov (United States)

    1984-01-01

    The feasibility of acoustic verification of microwave near field to far field transformation algorithms using the Phased Array Sonic Simulation System was studied. Existing electromagnetic near field measurement techniques and transformation algorithms (equations) were investigated. It was analytically determined that acoustic verification is valid. Acoustic simulation of electromagnetic near field to far field transformations is emphasized. The acoustic simulation of electromagnetic near field to far field transformation is verified for the modal expansion method. In the modal expansion method, data from antenna near field measurements are converted to a summation or spectrum of modes corresponding to wave numbers in the measurement coordinate system. Fourier transformation of those measurements preserves the far field information in a spectral form that is then readily extractable.

  20. Influence of turbulent atmosphere on the far-field coherent combined beam quality

    Institute of Scientific and Technical Information of China (English)

    Pu Zhou; Zejin Liu; Xiaojun Xu; Xiaolin Wang; Xiao Li; Zilun Chen

    2008-01-01

    Propagation of coherent combined laser beams in turbulent atmosphere is numerically studied based on the extended Huygens-Fresnel principle. By choosing beam propagation factor (BPF) and beam quality factor (BQ) to characterize the far-field irradiance distribution properties, the influence of turbulence on far-field coherent combined beam quality is studied in detail. The investigation reveals that with the coherence length decreasing, the irradiance distribution pattern evolves from typical non-Gaussian shape with multiple side-lobes into Gaussian shape which is seen in the incoherent combining case. In weak turbulent atmosphere, the far-field beam quality suffers less when the 1aser array gets more compact and operates at a longer wavelength. In strong turbulent atmosphere, the far-field beam quality degrades into the incoherent combining case without any relationship with the fill factor and laser wavelength.

  1. A universal expression of near-filed/far-field boundary in stratified structures

    CERN Document Server

    Li, Chao; Wang, Huai Yu; Wang, Xue Hua

    2015-01-01

    The division of the near-field and far-field zones for electromagnetic waves is important for simplifying theoretical calculations and applying far-field results. In this paper, we have studied the far-field asymptotic behaviors of dipole radiations in stratified backgrounds and obtained a universal empirical expression of near-field/far-field (NFFF) boundary. The boundary is mainly affected by lateral waves, which corresponds to branch point contributions in Sommerfeld integrals. In a semispace with a higher refractive index, the NFFF boundary is determined by a dimensional parameter and usually larger than the operating wavelength by at least two orders of magnitude. In a semispace with the lowest refractive index in the structure (usually air), the NFFF boundary is about ten wavelengths. Moreover, different treatments in the asymptotic method are discussed and numerically compared. An equivalence between the field expressions obtained from the asymptotic method and those from reciprocal theorem is demonstr...

  2. DESIGN EARTHQUAKES AND SEISMIC DEMAND FOR PBEE IN FAR-FIELD AND NEAR-SOURCE CONDITIONS

    OpenAIRE

    Chioccarelli, Eugenio

    2010-01-01

    In this thesis the problem of identification of design earthquakes and seismic demand for performance based earthquake engineering (PBEE) is studied referring to far-field and near-source conditions. Ordinary probability seismic hazard analyses (PSHA), usually referred to far-field conditions, are the base of hazard evaluation of the most advanced seismic codes (e.g. Eurocode 8, 2006, CS.LL.PP. 2008, etc.). PSHA allows to identify for each considered site the probability of exceedance of ...

  3. Near-field/far-field interface of a near-surface low level radioactive waste site

    OpenAIRE

    Beadle, Ian R.; S. Boult; Graham, J.; Hand, V. L.; Humphreys, Paul; Trivedi, D. P.; Warwick, P.

    2004-01-01

    Experimental and Modelling studies have been used to investigate the biogeochemical processes occurring at the interface zone between the near-field and far-field of the Drigg Low- Level radioactive Waste (LLW) trenches. These have led to a conceptual model of interface biogeochemistry, which has subsequently been modelled by the BNFL code known as the Generalised Repository Model (GRM). GRM simulations suggest that as organic rich leachate migrates into the far-field, iron III minerals such ...

  4. Active control of far-field sound radiated by a rectangular panel - a general analysis

    OpenAIRE

    Pan, Jie; Snyder, Scott D.; Hansen, Colin H.; Fuller, Chris R.

    1992-01-01

    In this paper a general analysis is presented for the active control of the far-field harmonic sound radiated by a rectangular panel that is built into an infinite baffle. In this analysis, the panel vibration may be generated by either airborne sound (incident sound field) or by structure borne vibrations. The far-field radiated sound is controlled either by acoustical sources or vibration sources. Minimization of both the local sound pressure and the total power output is considered. Analyt...

  5. Approximate analytical expressions of apertured broadband beams in the far field

    Institute of Scientific and Technical Information of China (English)

    Lu Shi-Zhuan; You Kai-Ming; Chen Lie-Zun; Wang You-Wen

    2011-01-01

    The approximate analytical expressions of the apertured broadband beams in the far field with Gaussian and Laguerre-Gaussian spatial modes are presented. For the radially polarized Laguerre-Gaussian beam, the result reveals that the electromagnetic field in the far field is transverse magnetic. The influences of bandwidth (Γ) and truncation parameter (C0) on the transverse intensity distribution of the Gaussian beam and on the energy flux distribution of radially polarized Laguerre-Gaussian beam are analysed.

  6. One-dimensional Fibonacci grating for far-field super-resolution imaging.

    Science.gov (United States)

    Wu, Kedi; Wang, Guo Ping

    2013-06-15

    One-dimensional Fibonacci gratings are used to transform evanescent waves into propagating waves for far-field super-resolution imaging. By detecting far-field intensity distributions of light through objects in front of the Fibonacci grating in free space, we can observe the objects with nearly λ/9 spatial resolution. Analytical results are verified by numerical simulations. We also discuss the effect of sampling error on imaging resolution of the system. PMID:23938967

  7. Far field pressure fluctuations and coherent structures in a low mach number turbulent jet flow

    OpenAIRE

    Camussi, Roberto; Felli, Mario

    2005-01-01

    Simultaneous far field pressur/in-flow velocity fluctuations are measured in a turbulent jet flow at low Ma number. The experiment is conducted in an acustically controlled enviroment using LDV and standard microphones. Velocity signals acquired in several positions within the flow field are conditioned on the far field pressure peaks and signatures of ensamble averaged noise emitting event are retrieved. Present results confirms previous findings obtained on the same apparatus showing that i...

  8. Coexistence of Near-Field and Far-Field Sources: the Angular Resolution Limit

    International Nuclear Information System (INIS)

    Passive source localization is a well known inverse problem in which we convert the observed measurements into information about the direction of arrivals. In this paper we focus on the optimal resolution of such problem. More precisely, we propose in this contribution to derive and analyze the Angular Resolution Limit (ARL) for the scenario of mixed Near-Field (NF) and Far-Field (FF) Sources. This scenario is relevant to some realistic situations. We base our analysis on the Smith's equation which involves the Cramér-Rao Bound (CRB). This equation provides the theoretical ARL which is independent of a specific estimator. Our methodology is the following: first, we derive a closed-form expression of the CRB for the considered problem. Using these expressions, we can rewrite the Smith's equation as a 4-th order polynomial by assuming a small separation of the sources. Finally, we derive in closed-form the analytic ARL under or not the assumption of low noise variance. The obtained expression is compact and can provide useful qualitative informations on the behavior of the ARL

  9. Near-field and far-field goniophotometry of focused LED arrays

    Science.gov (United States)

    Jacobs, Valéry A.; Forment, Stefaan; Rombauts, Patrick; Hanselaer, Peter

    2014-05-01

    Luminaires are conventionally modeled using a far-field representation. To calculate this representation, a photometer revolves a light source at fixed distance and illuminances are measured in a set of angular directions. Using the inversesquare- law, the far-field intensity, also termed luminous intensity distribution is then calculated. For Lambertian sources, the far-field starts from a distance of five times the maximal dimension of a light source; which is called the limiting photometric distance. The advent of luminaires composed of LED arrays with narrow beams have shown that this limit is no longer valid and far larger distances (up to 15 times the maximal diameter) are suggested by the lighting community. This problem is even more outspoken when the individual LEDs are focused at close distance, as in e.g. surgical luminaires. To overcome these problems, we exploit the use of a near-field representation to describe an array of two narrow-beam LEDs focused at close distance. For such a test source, this paper shows how a near-field luminance goniometer is able to construct ray-data. Ray files can be used to calculate a near-field representation and far-field representation of a light source. These measurements are validated by a theoretical derivation of the intensity of an array, using a simple analytical model to describe the emission of the individual LEDs. This near-field approach makes discussions to determine the far-field photometric distance superfluous.

  10. Experimental studies of far-field superlens for sub-diffractional optical imaging.

    Science.gov (United States)

    Liu, Zhaowei; Durant, Stéphane; Lee, Hyesog; Pikus, Yuri; Xiong, Yi; Sun, Cheng; Zhang, Xiang

    2007-05-28

    Contrary to the conventional near-field superlensing, subwavelength superlens imaging is experimentally demonstrated in the far-field. The key element is termed as a Far-field SuperLens (FSL) which consists of a conventional superlens and a nanoscale coupler. The evanescent fields from the object are enhanced and then converted into propagating fields by the FSL. By only measuring the propagating field in the far-field, the object image can be reconstructed with subwavelength resolution. As an example of this concept, we design and fabricate a silver structured one dimensional FSL. Experimental results show that feature resolution of better than 50nm is possible using current FSL design. PMID:19547010

  11. Theory of optical imaging beyond the diffraction limit with a far-field superlens

    CERN Document Server

    Durant, S; Liu, Z; Zhang, X; Durant, Stephane; Fang, Nicholas; Liu, Zhaowei; Zhang, Xiang

    2006-01-01

    Recent theoretical and experimental studies have shown that imaging with resolution well beyond the diffraction limit can be obtained with so-called superlenses. Images formed by such superlenses are, however, in the near field only, or a fraction of wavelength away from the lens. In this paper, we propose a far-field superlens (FSL) device which is composed of a planar superlens with periodical corrugation. We show in theory that when an object is placed in close proximity of such a FSL, a unique image can be formed in far-field. As an example, we demonstrate numerically that images of 40 nm lines with a 30 nm gap can be obtained from far-field data with properly designed FSL working at 376nm wavelength.

  12. Fast evaluation of far-field signals for time-domain wave propagation

    CERN Document Server

    Field, Scott E

    2014-01-01

    Time-domain simulation of wave phenomena on a finite computational domain often requires a fictitious outer boundary. An important practical issue is the specification of appropriate boundary conditions on this boundary, often conditions of complete transparency. Attention to this issue has been paid elsewhere, and here we consider a different, although related, issue: far-field signal recovery. Namely, from smooth data recorded on the outer boundary we wish to recover the far-field signal which would reach arbitrarily large distances. These signals encode information about interior scatterers and often correspond to actual measurements. This article expresses far-field signal recovery in terms of time-domain convolutions, each between a solution multipole moment recorded at the boundary and a sum-of-exponentials kernel. Each exponential corresponds to a pole term in the Laplace transform of the kernel, a finite sum of simple poles. Greengard, Hagstrom, and Jiang have derived the large-$\\ell$ (spherical-harmo...

  13. Dielectric metamaterial magnifier creating a virtual color image with far-field subwavelength information.

    Science.gov (United States)

    Zhang, Baile; Barbastathis, George

    2010-05-24

    We propose an approach for far-field optical subwavelength imaging by using a dielectric metamaterial magnifier with gradient refractive index. Different from previous superlens and hyperlens that form a real image with subwavelength features within narrowband, this magnifier creates a virtual color image with sub-100 nm resolution over broadband that can be captured directly by a conventional microscope in the far field. Because the magnifier is made of isotropic dielectric materials, the fabrication will be greatly simplified with existing metamaterial technologies. PMID:20588981

  14. Efficient Compression of Far Field Matrices in Multipole Algorithms based on Spherical Harmonics and Radiating Modes

    Directory of Open Access Journals (Sweden)

    Arne Schroeder

    2012-08-01

    Full Text Available This paper proposes a compression of far field matrices in the fast multipole method and its multilevel extension for electromagnetic problems. The compression is based on a spherical harmonic representation of radiation patterns in conjunction with a radiating mode expression of the surface current. The method is applied to study near field effects and the far field of an antenna placed on a ship surface. Furthermore, the electromagnetic scattering of an electrically large plate is investigated. It is demonstrated, that the proposed technique leads to a significant memory saving, making multipole algorithms even more efficient without compromising the accuracy.

  15. Unstable resonator system producing a high irradiance beam in the far field

    International Nuclear Information System (INIS)

    Laser systems comprising an unstable resonator and optics for increasing the magnification of the output beam from the resonator to concentrate the power distribution in the far field are disclosed. The resonator device produces a beam of laser energy which is an annulus in cross section and matched optics change the energy distribution in the annulus; both refractory and reflecting optics are disclosed. Also graphs describing the intensity distribution of the annular beam under various conditions in both the near field and far field locations in the optical system are provided

  16. Some properties on far-field pattern of scattering by penetrable obstacle in ocean waveguide

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    This paper is concerned with the properties of propagation far-field patterns corresponding to the scattering of time harmonic acoustic waves by a bounded penetrable obstacle in an ocean waveguide.The sets of solutions to the transmission problem are constructed such that the restriction of these solutions to the boundary of the penetrable obstacle is dense in a Hilbert space.Then conditions under which a set of propagation far-field patterns is complete in a Hilbert space are determined.These properties are important in investigating inverse transmission problems in an ocean waveguide.

  17. Analysis of ventilation systems subjected to explosive transients: far-field analysis

    International Nuclear Information System (INIS)

    Progress in developing a far-field explosion simulation computer code is outlined. The term far-field implies that this computer code is suitable for modeling explosive transients in ventilation systems that are far removed from the explosive event and are rather insensitive to the particular characteristics of the explosive event. This type of analysis is useful when little detailed information is available and the explosive event is described parametrically. The code retains all the features of the TVENT code and allows completely compressible flow with inertia and choking effects. Problems that illustrate the capabilities and limitations of the code are described

  18. Far-field breakup of spiral waves in the plankton ecological systems

    CERN Document Server

    Liu, Quan-Xing

    2007-01-01

    For oscillatory conditions, breakup of the spiral waves far away from the spiral core (as so-called "far-field breakup") was reported in a simple activator-inhibitor model by Markus B\\"{a}r, Michal Or-Guil and Lutz Brusch [Phys. Rev. Lett. \\textbf{82}, 1160 (1999) and New J. Phys. \\textbf{6}, 5 (2004)], which is in the chemical reaction-diffusion system. In present letter, the scenario in the plankton ecological system is reported. The spatial plankton model is studied numerically by computer and we find that the far-field breakup also exists in the oceanic ecological systems over a range of diffusion coefficients of phytoplankton and zooplankton. The far-field breakup leading to the spatial chaos patterns can be verified in field observation and is useful to understand the population dynamics of oceanic ecological systems. It also indicates that the far-field breakup may be a common phenomenon in the world. Finally, we give some illumination from the ecological meaning.

  19. Transport from the canister to the biosphere: Using an integrated near- and far-field model

    International Nuclear Information System (INIS)

    A coupled model concept which may be used for performance assessment of a nuclear repository is presented. The tool is developed by integration of two models, one near field and one far field model. A compartment model, NUCTRAN, is used to calculate the near field release from a damaged canister. The far field transport through fractured rock is simulated by using CHAN3D, based on a three-dimensional stochastic channel network concept. The near field release depends on the local hydraulic properties of the far field. The transport in the far field in turn depends on where the damaged canister(s) is located. The very large heterogeneities in the rock mass makes it necessary to study both the near field release properties and the location of release at the same time. In order to demonstrate the capabilities of the coupled model concept it is applied on a hypothetical repository located at the Hard Rock Laboratory in Aespoe, Sweden. Two main items were studied; the location of a damaged canister in relation to fracture zones and the barrier function of the host rock. In the study of the near field rock as a transport barrier the effect of different tunnel excavation methods which may influence the damage level of the rock around the tunnel was addressed

  20. Anomalous spectral shift of near- and far-field plasmonic resonances in nano-gaps

    CERN Document Server

    Lombardi, Anna; Weller, Lee; Andrae, Patrick; Benz, Felix; Chikkaraddy, Rohit; Aizpurua, Javier; Baumberg, Jeremy J

    2016-01-01

    The near-field and far-field spectral response of plasmonic systems are often assumed to be identical, due to the lack of methods that can directly compare and correlate both responses under similar environmental conditions. We develop a widely-tuneable optical technique to probe the near-field resonances within individual plasmonic nanostructures that can be directly compared to the corresponding far-field response. In tightly-coupled nanoparticle-on-mirror constructs with nanometer-sized gaps we find >40meV blueshifts of the near-field compared to the dark-field scattering peak, which agrees with full electromagnetic simulations. Using a transformation optics approach, we show such shifts arise from the different spectral interference between different gap modes in the near- and far-field. The control and tuning of near-field and far-field responses demonstrated here is of paramount importance in the design of optical nanostructures for field-enhanced spectroscopy, as well as to control near-field activity ...

  1. Algorithm of far-field centre estimation based on phase-only matched filter

    Institute of Scientific and Technical Information of China (English)

    Gao Yan-Qi; Zhu Bao-Qiang; Liu Dai-Zhong; Liu Xiao-Feng; Lin Zun-Qi

    2009-01-01

    Estimation of the far-field centre is carried out in beam auto-alignment. In this paper, the features of the far-field of a square beam are presented. Based on these features, a phase-only matched filter is designed, and the algorithm of centre estimation is developed. Using the simulated images with different kinds of noise and the 40 test images that are taken in sequence, the accuracy of this algorithm is estimated. Results show that the error is no more than one pixel for simulated noise images with a 99% probability, and the stability is restricted within one pixel for test images. Using the improved algorithm, the consumed time is reduced to 0.049 s.

  2. Evaluation of Near/Far Field and Directivity of Ultrasonic Transducer for Turbine Rotor Disc

    International Nuclear Information System (INIS)

    Near/far field length and directivity of transducers were investigated for the improvement and evaluation of the detectability of flaws in a disc. The reference block is fabricated for the disc of stage 6 in Yonggwang unit 1. The near/far field and directivity of an ultrasonic transducer with the center frequency of 5MHz were calculated for the inspection of the disc. These values showed good agreements with the experimental results. In the system composed of a wedge and a disc, those are evaluated theoretically and experimentally for the specimen with the artificial flaws of the size 2mm and 4mm and an ultrasonic transducer with the center frequency 5MHz and diameter 0.5 inch. The detectability of keyway-flaw and detectable region for inspection were evaluated by using both tangential 45 .deg. and 90 .deg. transducers located at the distance of 53mm and 75mm from the disc hub, respectively

  3. Analytical Prediction and Optimization of Far-Field Pyroshock Test Procedures

    Science.gov (United States)

    Lacher, Alexander; Jungel, Nikolas; von Wagner, Utz; Bager, Annette

    2012-07-01

    The simulation of far-field pyroshocks is mainly performed by the use of mechanical or mechatronic devices such as hammer pendulums, shakers and piezoactors. Latter show limitations concerning frequency and acceleration ranges which does not hold for hammer pendulums or bolt guns. Their controllability, however, is rather unsatisfactory and there still exists a general lack of computational prediction tools for usually time consuming and costly far-field pyroshock tests. Mechanical minimal models of existing hammer test devices are presented and investigated by the use of the finite element and analytical methods. The tedious mechanical impact problem is reduced by introducing a nonlinear compressive spring connecting striking partners. Computational test results are verified by experiments and optimized by an evolution strategy allowing for determination of optimum test parameters. The algorithms developed are the basis for fast and efficient predictions of pyroshock tests.

  4. Far-field mapping of the longitudinal magnetic and electric optical fields

    CERN Document Server

    Ecoffey, C

    2013-01-01

    In this letter, we demonstrate the experimental mapping of the longitudinal magnetic and electric optical fields with a standard scanning microscope that involves a high numerical aperture far-field objective. The imaging concept relies upon the insertion of an azimuthal or a radial polarizer within the detection path of the microscope which acts as an optical electromagnetic filter aimed at transmitting selectively to the detector the signal from the magnetic or electric longitudinal fields present in the detection volume, respectively. The resulting system is thus versatile, non invasive, of high resolution, and shows high detection efficiencies. Magnetic optical properties of physical and biological micro and nano-structures may thus be revealed with a far-field microscope.

  5. Far-field Imaging beyond the Diffraction Limit Using a Single Radar

    CERN Document Server

    Li, Lianlin; Cui, Tiejun; Tan, Yunhua; Yao, Kan

    2014-01-01

    Far-field imaging beyond the diffraction limit is a long sought-after goal in various imaging applications, which requires usually an array of antennas or mechanical scanning. Here, we present an alternative and novel concept for this challenging problem: a single radar system consisting of a spatial-temporal resonant aperture antenna (referred to as the slavery antenna) and a broadband horn antenna (termed the master antenna). We theoretically demonstrate that such resonant aperture antenna is responsible for converting parts of the evanescent waves into propagating waves, and delivering them to the far-field. We also demonstrate that there are three basic requirements on the proposed subwavelength imaging strategy: the strong spatial-temporal dispersive aperture, the near-field coupling, and the temporal (or broadband) illumination. Such imaging concept of a single radar provides unique ability to produce real-time data when an object is illuminated by broadband electromagnetic waves, which lifts up the har...

  6. Estimation of coupling efficiency of optical fiber by far-field method

    Science.gov (United States)

    Kataoka, Keiji

    2010-09-01

    Coupling efficiency to a single-mode optical fiber can be estimated with the field amplitudes at far-field of an incident beam and optical fiber mode. We call it the calculation by far-field method (FFM) in this paper. The coupling efficiency by FFM is formulated including effects of optical aberrations, vignetting of the incident beam, and misalignments of the optical fiber such as defocus, lateral displacements, and angle deviation in arrangement of the fiber. As the results, it is shown the coupling efficiency is proportional to the central intensity of the focused spot, i.e., Strehl intensity of a virtual beam determined by the incident beam and mode of the optical fiber. Using the FFM, a typical optics in which a laser beam is coupled to an optical fiber with a lens of finite numerical aperture (NA) is analyzed for several cases of amplitude distributions of the incident light.

  7. FARF31 - a far field radionuclide migration code for use with the PROPER package

    International Nuclear Information System (INIS)

    The far field radionuclide migration computer code FARF31 has been developed as a submodel to the probabilistic package PROPER, and can be considered a refined and less CPU-time consuming version of the far field models used in the KBS-3 study. FARF31 constitutes the numerical equivalent of a dual porosity model for radionuclide migration along a stream tube in fractured rock. It calculates the migration rate of the radionuclide chains at the exit of the tube given the input rates at the entrance. Advection, dispersion and one dimensional matrix diffusion is taken into account as well as chain decay. The underlying equations are formulated in terms of groundwater travel time and Peclet number, thus allowing for the groundwater travel time to be computed outside FARF31 by a separate submodel fitted to handle Darcy velocities and kinematic porosities which vary in space. Input migration rate boundary conditions are arbitrary. (authors)

  8. Review of speciation and solubility of radionuclides in the near and far field. Pt. 2

    International Nuclear Information System (INIS)

    This report represents Part 2 in a series of three reports which review the speciation and solubility of radionuclides in the near and far field. Part 2 is a general bibliography from 1978 to 1991. This report contains the bibliography for the review of speciation and solubility radionuclides in the near and far field from 1978 to 1991. The importance of the solubility and speciation of radionuclides in relation to the safety assessment of the repository is discussed. Solubility is defined, both theoretically and pragmatically, and the factors which influence solubility and speciation are discussed. The literature search was performed using the INIS database. The UKAEA RECAP database, the NIREX report bibliography and a list of DOE reports provided by the DOE were also used. The bibliography is divided into five sections, solubility and speciation experimental data, basic thermodynamic data, solubility limiting solid phases, experimental design and review and overview articles. Some references appear in more than one section. (Author)

  9. Far-field potentials recorded from action potentials and from a tripole in a hemicylindrical volume.

    Science.gov (United States)

    Jewett, D L; Deupree, D L

    1989-05-01

    There is growing evidence in support of the hypothesis that far-field potentials are recorded when action potentials encounter discontinuities in the surrounding volume. The present study found further support for this hypothesis using two methods of experimentation. The first method recorded potentials when the action potential from an isolated bullfrog sciatic nerve in a hemicylindrical volume (i) encountered a change in the shape of the surrounding volume, (ii) crossed a boundary between 2 volumes of differing resistivities, (iii) reached a bend in the nerve, or (iv) reached the functional end of the nerve. In the second method, potentials were recorded when an electrical tripole, constructed in a way to produce the electrical equivalent of an action potential, encountered the same discontinuities as well as when it was configured to simulate a curved nerve. These results are consistent with the hypothesis that dipole components of an action potential predominant in far-field recordings. PMID:2469568

  10. Analytical characterization and numerical approximation of interior eigenvalues for impenetrable scatterers from far fields

    International Nuclear Information System (INIS)

    We characterize the interior eigenvalues of a class of impenetrable, non-absorbing scattering objects from the spectra of the corresponding far field operators for a continuum of wave numbers. Our proof simplifies arguments from the original proof for Dirichlet scattering objects given in Eckmann and Pillet (1995 Commun. Math. Phys. 170 283–313) and furthermore extends to the cases of Neumann and Robin scattering objects. Further, the analytical characterization of interior eigenvalues of a scatterer can be exploited numerically. We present an algorithm that approximates interior eigenvalues from far field data without knowing the scattering object, we give several numerical examples for different scatterers and sound-hard as well as sound-soft boundary conditions, and we finally show through numerical examples that this algorithm remains stable under noise. (paper)

  11. Near- and far-field scattering resonance frequency shift in dielectric and perfect electric conducting cylinders.

    Science.gov (United States)

    Yuffa, Alex J; Gutierrez, Yael; Sanz, Juan M; Alcaraz de la Osa, Rodrigo; Saiz, José M; González, Francisco; Moreno, Fernando; Videen, Gorden

    2016-03-01

    The ability to infer near-field scattering properties from far-field measurements is of paramount importance in nano-optics. Recently we derived an approximate formula for predicting the frequency shift between near- and far-field intensity peaks in the case of a dielectric sphere. In this work we demonstrate that almost an identical formula can be used to predict the resonance shift of a dielectric cylinder and a perfectly conducting cylinder. We find the redshift of the resonance peak of the perfect electric conducting cylinder to be approximately 2 orders of magnitude greater than for the dielectric cylinder. The errors in our approximate analytic formula for predicting the redshift are approximately only twice as great. Furthermore, we apply the redshift formula to a silicon cylinder and discuss its magneto-dielectric properties, which may be of interest in design of metamaterials. PMID:26974908

  12. Study on the Optically Transparent Near-Field and Far-Field RFID Reader Antenna

    Directory of Open Access Journals (Sweden)

    Yuan Yao

    2014-01-01

    Full Text Available A study on the optically transparent RFID reader antenna which can operate in both near-field and far-field is proposed in this paper. The antenna with a dimension of 45 mm × 45 mm is fabricated using Indium tin oxide film and can operate from 915 to 935 MHz covering the China UHF RFID band. The strong and uniform magnetic field is excited by magnetic dipole source. Both simulation and measurement results are shown to illustrate the performance of the proposed antenna. The measured reading distances are up to 40 mm and 100 mm for near-field and far-field applications, respectively.

  13. Super-resolution far-field ghost imaging via compressive sampling

    OpenAIRE

    Gong, Wenlin; han, Shensheng

    2009-01-01

    Much more image details can be resolved by improving the system's imaging resolution and enhancing the resolution beyond the system's Rayleigh diffraction limit is generally called super-resolution. By combining the sparse prior property of images with the ghost imaging method, we demonstrated experimentally that super-resolution imaging can be nonlocally achieved in the far field even without looking at the object. Physical explanation of super-resolution ghost imaging via compressive sampli...

  14. A Flexible Far Field Boundary Procedure for Hyperbolic Problems: Multiple Penalty Terms Applied in a Domain

    OpenAIRE

    Nordström, Jan; Abbas, Qaisar; A. Erickson, Brittany; Frenander, Hannes

    2013-01-01

    A new weak boundary procedure for hyperbolic problems is presented. We consider high order finite difference operators of summation-by-parts form with weak boundary conditions and generalize that technique. The new boundary procedure is applied at far field boundaries in an extended domain where data is known. We show how to raise the order of accuracy of the scheme, how to modify the spectrum of the resulting operator and how to construct non-reflecting properties at the boundaries. The new ...

  15. Note on the classification of super-resolution in far-field microscopy and information theory

    CERN Document Server

    Passon, Oliver

    2016-01-01

    In recent years several far-field microscopy techniques have been developed which manage to overcome the diffraction limit of resolution. A unifying classification scheme for them is clearly desirable. We argue that existing schemes based on the information capacity of the optical system can not easily be extended to cover e.g., STED microscopy or techniques based on single molecule imaging. We suggest a classification based on a reconstruction of the Abbe limit.

  16. A Coupled Far-Field Formulation for Time-Periodic Numerical Problems in Fluid Dynamics

    Indian Academy of Sciences (India)

    Edmund Chadwick; Rabea El-Mazuzi

    2012-11-01

    Consider uniform flow past an oscillating body generating a time-periodic motion in an exterior domain, modelled by a numerical fluid dynamics solver in the near field around the body. A far-field formulation, based on the Oseen equations, is presented for coupling onto this domain thereby enabling the whole space to be modelled. In particular, examples for formulations by boundary elements and infinite elements are described.

  17. Far-field optical nanothermometry using individual sub-50 nm upconverting nanoparticles

    Science.gov (United States)

    Kilbane, Jacob D.; Chan, Emory M.; Monachon, Christian; Borys, Nicholas J.; Levy, Elizabeth S.; Pickel, Andrea D.; Urban, Jeffrey J.; Schuck, P. James; Dames, Chris

    2016-06-01

    We demonstrate far-field optical thermometry using individual NaYF4 nanoparticles doped with 2% Er3+ and 20% Yb3+. Isolated 20 × 20 × 40 nm3 particles were identified using only far-field optical imaging, confirmed by subsequent scanning electron microscopy. The luminescence thermometry response for five such single particles was characterized for temperatures from 300 K to 400 K. A standard Arrhenius model widely used for larger particles can still be accurately applied to these sub-50 nm particles, with good particle-to-particle uniformity (response coefficients exhibited standard deviations below 5%). With its spatial resolution on the order of 50 nm when imaging a single particle, far below the diffraction limit, this technique has potential applications for both fundamental thermal measurements and nanoscale metrology in industrial applications.We demonstrate far-field optical thermometry using individual NaYF4 nanoparticles doped with 2% Er3+ and 20% Yb3+. Isolated 20 × 20 × 40 nm3 particles were identified using only far-field optical imaging, confirmed by subsequent scanning electron microscopy. The luminescence thermometry response for five such single particles was characterized for temperatures from 300 K to 400 K. A standard Arrhenius model widely used for larger particles can still be accurately applied to these sub-50 nm particles, with good particle-to-particle uniformity (response coefficients exhibited standard deviations below 5%). With its spatial resolution on the order of 50 nm when imaging a single particle, far below the diffraction limit, this technique has potential applications for both fundamental thermal measurements and nanoscale metrology in industrial applications. Electronic supplementary information (ESI) available. See DOI: 10.1039/c6nr01479h

  18. Far-field fluorescence microscopy beyond the diffraction limit: Fluorescence imaging with ultrahigh resolution

    OpenAIRE

    Rice, James H.

    2007-01-01

    Fluorescence microscopy is an important and extensively utilised tool for imaging biological systems. However, the image resolution that can be obtained has a limit as defined through the laws of diffraction. Demand for improved resolution has stimulated research into developing methods to image beyond the diffraction limit based on far-field fluorescence microscopy techniques. Rapid progress is being made in this area of science with methods emerging that enable fluorescence imaging in the f...

  19. Far-field Imaging beyond the Diffraction Limit Using a Single Radar

    OpenAIRE

    Li, Lianlin; Li, Fang; Cui, Tiejun; TAN, YUNHUA; Yao, Kan

    2014-01-01

    Far-field imaging beyond the diffraction limit is a long sought-after goal in various imaging applications, which requires usually an array of antennas or mechanical scanning. Here, we present an alternative and novel concept for this challenging problem: a single radar system consisting of a spatial-temporal resonant aperture antenna (referred to as the slavery antenna) and a broadband horn antenna (termed the master antenna). We theoretically demonstrate that such resonant aperture antenna ...

  20. Chiral-field microwave antennas (Chiral microwave near fields for far-field radiation)

    CERN Document Server

    Kamenetskii, E O; Shavit, R

    2015-01-01

    In a single-element structure we obtain a radiation pattern with a squint due to chiral microwave near fields originated from a magnetostatic-mode ferrite disk. At the magnetostatic resonances, one has strong subwavelength localization of energy of microwave radiation. Magnetostatic oscillations in a thin ferrite disk are characterized by unique topological properties: the Poynting-vector vortices and the field helicity. The chiral-topology near fields allow obtaining unique phase structure distribution for far-field microwave radiation.

  1. Compact planar far-field superlens based on anisotropic left-handed metamaterials

    Science.gov (United States)

    Shen, Nian-Hai; Foteinopoulou, Stavroula; Kafesaki, Maria; Koschny, Thomas; Ozbay, Ekmel; Economou, Eleftherios N.; Soukoulis, Costas M.

    2009-09-01

    Pendry’s perfect lens has spurred intense interest for its practical realization at visible frequencies. However, fabrication of low-loss isotropic left-handed metamaterials is a current challenge. In this work, we theoretically show that under specific conditions anisotropic metamaterial slabs can emulate Pendry’s perfect-lens phenomenon on a plane. Geometric optics leads to a new lens formula for this special anisotropic metamaterial superlens, which allows significant shrinkage of the metamaterial slab thickness for a certain range of far-field operation. Conversely, such anisotropic metamaterial superlens with the same thickness as its isotropic analog can operate for much larger distances between object and lens. We present numerical simulations which confirm our theoretical calculations. In particular, we find subdiffraction focusing that rivals the perfect isotropic negative-index metamaterial lens performance and obeys the new lens formula as predicted. In addition, we demonstrate that it is possible to attain far-field superfocusing with a metamaterial slab as thin as half the free-space wavelength. We believe this work will inspire new anisotropic metamaterial designs and opens a promising route for the realization of compact far-field superlenses in the visible regime.

  2. Volumetric visualization of the near- and far-field wake in flapping wings

    International Nuclear Information System (INIS)

    The flapping wings of flying animals create complex vortex wake structure; understanding its spatial and temporal distribution is fundamental to animal flight theory. In this study, we applied the volumetric 3-component velocimetry to capture both the near- and far-field flow generated by a pair of mechanical flapping wings. For the first time, the complete three-dimensional wake structure and its evolution throughout a wing stroke were quantified and presented experimentally. The general vortex wake structure maintains a quite consistent form: vortex rings in the near field and two shear layers in the far field. Vortex rings shed periodically from the wings and are linked to each other in successive strokes. In the far field, the shed vortex rings evolve into two parallel shear layers with dominant vorticity convected from tip and root vortices. The shear layers are nearly stationary in space compared to the periodic vortex rings shed in the near field. In addition, downwash passes through the centers of the vortex rings and extends downward between the two shear layers. (paper)

  3. Insights on proximity effect and multiphoton induced luminescence from gold nanospheres in far field optical microscopy

    Energy Technology Data Exchange (ETDEWEB)

    Borglin, Johan [Biomedical Photonics Group, Department of Chemistry and Molecular Biology, University of Gothenburg, Kemivägen 10, 412 96 Gothenburg (Sweden); Department of Physics, University of Gothenburg, Kemivägen 10, 412 96 Gothenburg (Sweden); Guldbrand, Stina [Department of Physics, University of Gothenburg, Kemivägen 10, 412 96 Gothenburg (Sweden); Evenbratt, Hanne [Pharmaceutical Technology, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemigården 4, 412 96 Gothenburg (Sweden); Kirejev, Vladimir; Ericson, Marica B., E-mail: marica.ericson@chem.gu.se [Biomedical Photonics Group, Department of Chemistry and Molecular Biology, University of Gothenburg, Kemivägen 10, 412 96 Gothenburg (Sweden); Grönbeck, Henrik [Department of Applied Physics, Chalmers University of Technology, Kemivägen 9, 412 96 Gothenburg (Sweden)

    2015-12-07

    Gold nanoparticles can be visualized in far-field multiphoton laser-scanning microscopy (MPM) based on the phenomena of multiphoton induced luminescence (MIL). This is of interest for biomedical applications, e.g., for cancer diagnostics, as MPM allows for working in the near-infrared (NIR) optical window of tissue. It is well known that the aggregation of particles causes a redshift of the plasmon resonance, but its implications for MIL applying far-field MPM should be further exploited. Here, we explore MIL from 10 nm gold nanospheres that are chemically deposited on glass substrates in controlled coverage gradients using MPM operating in NIR range. The substrates enable studies of MIL as a function of inter-particle distance and clustering. It was shown that MIL was only detected from areas on the substrates where the particle spacing was less than one particle diameter, or where the particles have aggregated. The results are interpreted in the context that the underlying physical phenomenon of MIL is a sequential two-photon absorption process, where the first event is driven by the plasmon resonance. It is evident that gold nanospheres in this size range have to be closely spaced or clustered to exhibit detectable MIL using far-field MPM operating in the NIR region.

  4. Volumetric visualization of the near- and far-field wake in flapping wings.

    Science.gov (United States)

    Liu, Yun; Cheng, Bo; Barbera, Giovanni; Troolin, Daniel R; Deng, Xinyan

    2013-09-01

    The flapping wings of flying animals create complex vortex wake structure; understanding its spatial and temporal distribution is fundamental to animal flight theory. In this study, we applied the volumetric 3-component velocimetry to capture both the near- and far-field flow generated by a pair of mechanical flapping wings. For the first time, the complete three-dimensional wake structure and its evolution throughout a wing stroke were quantified and presented experimentally. The general vortex wake structure maintains a quite consistent form: vortex rings in the near field and two shear layers in the far field. Vortex rings shed periodically from the wings and are linked to each other in successive strokes. In the far field, the shed vortex rings evolve into two parallel shear layers with dominant vorticity convected from tip and root vortices. The shear layers are nearly stationary in space compared to the periodic vortex rings shed in the near field. In addition, downwash passes through the centers of the vortex rings and extends downward between the two shear layers. PMID:23924871

  5. Insights on proximity effect and multiphoton induced luminescence from gold nanospheres in far field optical microscopy

    International Nuclear Information System (INIS)

    Gold nanoparticles can be visualized in far-field multiphoton laser-scanning microscopy (MPM) based on the phenomena of multiphoton induced luminescence (MIL). This is of interest for biomedical applications, e.g., for cancer diagnostics, as MPM allows for working in the near-infrared (NIR) optical window of tissue. It is well known that the aggregation of particles causes a redshift of the plasmon resonance, but its implications for MIL applying far-field MPM should be further exploited. Here, we explore MIL from 10 nm gold nanospheres that are chemically deposited on glass substrates in controlled coverage gradients using MPM operating in NIR range. The substrates enable studies of MIL as a function of inter-particle distance and clustering. It was shown that MIL was only detected from areas on the substrates where the particle spacing was less than one particle diameter, or where the particles have aggregated. The results are interpreted in the context that the underlying physical phenomenon of MIL is a sequential two-photon absorption process, where the first event is driven by the plasmon resonance. It is evident that gold nanospheres in this size range have to be closely spaced or clustered to exhibit detectable MIL using far-field MPM operating in the NIR region

  6. Experimental Verification of the Spectral Shift between Near- and Far-Field Peak Intensities of Plasmonic Nanoantennas

    CERN Document Server

    Alonso-Gonzalez, P; Neubrech, F; Huck, Christian; Chen, J; Golmar, F; Casanova, F; Hueso, L E; Pucci, A; Aizpurua, J; Hillenbrand, R

    2013-01-01

    Theory predicts a distinct spectral shift between the near- and far-field optical responses of plasmonic antennas. Here we combine near-field optical microscopy and far-field spectroscopy of individual infrared-resonant nanoantennas to verify experimentally this spectral shift. Numerical calculations corroborate our experimental results. We furthermore discuss the implications of this effect in surface-enhanced infrared spectroscopy (SEIRS).

  7. The Optical Chirality Flux as a Useful Far-Field Probe of Chiral Near Fields

    CERN Document Server

    Poulikakos, Lisa V; McPeak, Kevin M; Burger, Sven; Niegemann, Jens; Hafner, Christian; Norris, David J

    2016-01-01

    To optimize the interaction between chiral matter and highly twisted light, quantities that can help characterize chiral electromagnetic fields near nanostructures are needed. Here, by analogy with Poynting's theorem, we formulate the time-averaged conservation law of optical chirality in lossy dispersive media and identify the optical chirality flux as an ideal far-field observable for characterizing chiral optical near fields. Bounded by the conservation law, we show that it provides precise information, unavailable from circular dichroism spectroscopy, on the magnitude and handedness of highly twisted fields near nanostructures.

  8. Theory of optical imaging beyond the diffraction limit with a far-field superlens

    OpenAIRE

    Durant, Stephane; Liu, Zhaowei; Fang, Nicholas; Zhang, Xiang

    2006-01-01

    Recent theoretical and experimental studies have shown that imaging with resolution well beyond the diffraction limit can be obtained with so-called superlenses. Images formed by such superlenses are, however, in the near field only, or a fraction of wavelength away from the lens. In this paper, we propose a far-field superlens (FSL) device which is composed of a planar superlens with periodical corrugation. We show in theory that when an object is placed in close proximity of such a FSL, a u...

  9. Near-field to far-field characterization of speckle patterns generated by disordered nanomaterials

    CERN Document Server

    Parigi, Valentina; Binard, Guillaume; Bourdillon, Céline; Maître, Agnès; Carminati, Rémi; Krachmalnicoff, Valentina; De Wilde, Yannick

    2016-01-01

    We study the intensity spatial correlation function of optical speckle patterns above a disordered dielectric medium in the multiple scattering regime. The intensity distributions are recorded by scanning near-field optical microscopy (SNOM) with sub-wavelength spatial resolution at variable distances from the surface in a range which spans continuously from the near-field (distance $ \\ll \\lambda $) to the far-field regime (distance $\\gg \\lambda $). The non-universal behavior at sub-wavelength distances reveals the connection between the near-field speckle pattern and the internal structure of the medium.

  10. Far field of beams generated by quasi-homogeneous sources passing through polarization gratings

    Science.gov (United States)

    Piquero, G.; Borghi, R.; Mondello, A.; Santarsiero, M.

    2001-08-01

    We analyze the polarization features of the beam, generated by a class of partially polarized quasi-homogeneous sources, which propagates through a polarization grating. Analytical expressions in the far zone for the beam coherence polarization matrix, the degree of polarization and the Stokes parameters are given. In particular, it is shown that, under some hypotheses, it is possible to completely and uniformly depolarize the beam in the far field. The influence of source parameters, such as the state of polarization, intensity and degree of coherence, on the degree of polarization and the Stokes parameters is also investigated.

  11. Characterization of Nonparaxial Truncated Cosine-Gaussian Beams and the Beam Quality in the Far Field

    Institute of Scientific and Technical Information of China (English)

    KANG Xiao-Ping; L(U) Bai-Da

    2006-01-01

    @@ The analytical expression characterizing the propagation of nonparaxial truncated cosine-Gaussian (CoG) beams in free space is derived, and some special cases are discussed. The extended power in the bucket (PIB) is proposed to characterize the beam quality of nonparaxial truncated beams in the far field. It is shown that the extended PIB is applicable to nonparaxial truncated beams, and the PIB of nonparaxial truncated CoG beams depends on the decentred parameter, waist-width-to-wavelength ratio, truncation parameter, and bucket size chosen.

  12. Far-Field and Middle-Field Vertical Velocities Associated with Megathrust Earthquakes

    Science.gov (United States)

    Fleitout, L.; Trubienko, O.; Klein, E.; Vigny, C.; Garaud, J.; Shestakov, N.; Satirapod, C.; Simons, W. J.

    2013-12-01

    The recent megathrust earthquakes (Sumatra, Chili and Japan) have induced far-field postseismic subsidence with velocities from a few mm/yr to more than 1cm/yr at distances from 500 to 1500km from the earthquake epicentre, for several years following the earthquake. This subsidence is observed in Argentina, China, Korea, far-East Russia and in Malaysia and Thailand as reported by Satirapod et al. ( ASR, 2013). In the middle-field a very pronounced uplift is localized on the flank of the volcanic arc facing the trench. This is observed both over Honshu, in Chile and on the South-West coast of Sumatra. In Japan, the deformations prior to Tohoku earthquake are well measured by the GSI GPS network: While the East coast was slightly subsiding, the West coast was raising. A 3D finite element code (Zebulon-Zset) is used to understand the deformations through the seismic cycle in the areas surrounding the last three large subduction earthquakes. The meshes designed for each region feature a broad spherical shell portion with a viscoelastic asthenosphere. They are refined close to the subduction zones. Using these finite element models, we find that the pattern of the predicted far-field vertical postseismic displacements depends upon the thicknesses of the elastic plate and of the low viscosity asthenosphere. A low viscosity asthenosphere at shallow depth, just below the lithosphere is required to explain the subsidence at distances from 500 to 1500km. A thick (for example 600km) asthenosphere with a uniform viscosity predicts subsidence too far away from the trench. Slip on the subduction interface is unable tot induce the observed far-field subsidence. However, a combination of relaxation in a low viscosity wedge and slip or relaxation on the bottom part of the subduction interface is necessary to explain the observed postseismic uplift in the middle-field (volcanic arc area). The creep laws of the various zones used to explain the postseismic data can be injected in

  13. Coupled near-field and far-field exposure assessment framework for chemicals in consumer products

    DEFF Research Database (Denmark)

    Fantke, Peter; Ernstoff, Alexi; Huang, Lei;

    2016-01-01

    efficient way to rapidly compare exposure pathways for adult and child users and for the general population. This framework constitutes a user-friendly approach to develop, compare and interpret multiple human exposure scenarios in a coupled system of near-field ('user' environment), far-field and human......Humans can be exposed to chemicals in consumer products through product use and environmental emissions over the product life cycle. Exposure pathways are often complex, where chemicals can transfer directly from products to humans during use or exchange between various indoor and outdoor...

  14. The far-field of a gravitating source in relation to its interior

    International Nuclear Information System (INIS)

    It is proved that in the context of the first post-Newtonian perfect fluid theory it is possible to express the far-field metric tensor of an arbitrary perfect-fluid source in terms of parameters, which are known as three-dimensional volume integrals over the source's interior. Such a description for an arbitrary source is not known in the context of the exact theory of gravity. It seems that the approximate description presented here is the only and the more general one valid consistently to the post-Newtonian approximation. (author)

  15. Far-field optical imaging and manipulation of individual spins with nanoscale resolution

    Science.gov (United States)

    Maurer, P. C.; Maze, J. R.; Stanwix, P. L.; Jiang, L.; Gorshkov, A. V.; Zibrov, A. A.; Harke, B.; Hodges, J. S.; Zibrov, A. S.; Yacoby, A.; Twitchen, D.; Hell, S. W.; Walsworth, R. L.; Lukin, M. D.

    2010-11-01

    A fundamental limit to existing optical techniques for measurementand manipulation of spin degrees of freedom is set by diffraction, which does not allow spins separated by less than about a quarter of a micrometre to be resolved using conventional far-field optics. Here, we report an efficient far-field optical technique that overcomes the limiting role of diffraction, allowing individual electronic spins to be detected, imaged and manipulated coherently with nanoscale resolution. The technique involves selective flipping of the orientation of individual spins, associated with nitrogen-vacancy centres in room-temperature diamond, using a focused beam of light with intensity vanishing at a controllable location, which enables simultaneous single-spin imaging and magnetometry at the nanoscale with considerably less power than conventional techniques. Furthermore, by inhibiting spin transitions away from the laser intensity null, selective coherent rotation of individual spins is realized. This technique can be extended to subnanometre dimensions, thus enabling applications in diverse areas ranging from quantum information science to bioimaging.

  16. Far-field nanoscale infrared spectroscopy of vibrational fingerprints of molecules with graphene plasmons

    Science.gov (United States)

    Hu, Hai; Yang, Xiaoxia; Zhai, Feng; Hu, Debo; Liu, Ruina; Liu, Kaihui; Sun, Zhipei; Dai, Qing

    2016-01-01

    Infrared spectroscopy, especially for molecular vibrations in the fingerprint region between 600 and 1,500 cm−1, is a powerful characterization method for bulk materials. However, molecular fingerprinting at the nanoscale level still remains a significant challenge, due to weak light–matter interaction between micron-wavelengthed infrared light and nano-sized molecules. Here we demonstrate molecular fingerprinting at the nanoscale level using our specially designed graphene plasmonic structure on CaF2 nanofilm. This structure not only avoids the plasmon–phonon hybridization, but also provides in situ electrically-tunable graphene plasmon covering the entire molecular fingerprint region, which was previously unattainable. In addition, undisturbed and highly confined graphene plasmon offers simultaneous detection of in-plane and out-of-plane vibrational modes with ultrahigh detection sensitivity down to the sub-monolayer level, significantly pushing the current detection limit of far-field mid-infrared spectroscopies. Our results provide a platform, fulfilling the long-awaited expectation of high sensitivity and selectivity far-field fingerprint detection of nano-scale molecules for numerous applications. PMID:27460765

  17. A Broadband UHF Tag Antenna For Near-Field and Far-Field RFID Communications

    Directory of Open Access Journals (Sweden)

    M. Dhaouadi

    2014-12-01

    Full Text Available The paper deals with the design of passive broadband tag antenna for Ultra-High Frequency (UHF band. The antenna is intended for both near and far fields Radio Frequency Identification (RFID applications. The meander dipole tag antenna geometry modification is designed for frequency bandwidth increasing. The measured bandwidth of the proposed broadband Tag antenna is more than 140 MHz (820–960 MHz, which can cover the entire UHF RFID band. A comparison between chip impedance of datasheet and the measured chip impedance has been used in our simulations. The proposed progressive meandered antenna structure, with an overall size of 77 mm × 14 mm × 0.787 mm, produces strong and uniform magnetic field distribution in the near-field zone. The antenna impedance is matched to common UHF chips in market simply by tuning its capacitive and inductive values since a perfect matching is required in the antenna design in order to enhance the near and the far field communications. Measurements confirm that the designed antenna exhibits good performance of Tag identification for both near-field and far-field UHF RFID applications.

  18. Holocene Relative Sea-Level Changes from Near-, Intermediate-, and Far-Field Locations

    Science.gov (United States)

    Walker, J. S.; Khan, N.; Shaw, T.; Ashe, E.; Vacchi, M.; Peltier, W. R.; Kopp, R. E.; Horton, B.

    2015-12-01

    Holocene relative sea-level (RSL) records exhibit spatial and temporal variability that arises mainly from the interaction of eustatic (land ice volume and thermal expansion) and isostatic (glacio- and hydro-) factors. We fit RSL histories from near-, intermediate-, and far-field locations with noisy-input Gaussian process models to assess rates of RSL change from selected study areas. Records from near-field regions (e.g., Antarctica, Greenland, Canada, Sweden, and Scotland) reveal a complex pattern of RSL fall from a maximum marine limit due to the net effect of eustatic sea-level rise and glacial-isostatic uplift with rates of RSL fall as great as -69 ± 9 m/ka. Intermediate-field regions (e.g., mid-Atlantic and Pacific coasts of the United States, Netherlands, Southern France, St. Croix) display variable rates of RSL rise from the cumulative effect of isostatic and eustatic factors. Fast rates of RSL rise (up to 10 ± 1 m/ka) are found in the early Holocene in regions near the center of forebulge collapse. Far-field RSL records exhibit a mid-Holocene highstand, the timing (between 8 and 4 ka) and magnitude (between <1 and 6 m) of which varies across South America, Africa, Asia and Australia regions.

  19. Modelling of far-field gas migration from a deep radioactive waste repository

    International Nuclear Information System (INIS)

    In assessing the post-closure safety of a deep radioactive waste repository, it is necessary to show that gas generated within the repository can migrate away, through the far-field geology, without affecting repository safety. This paper discusses the contribution of various mechanisms to gas migration through the far field; for example, diffusion of dissolved gas versus gas-phase movement, and bubble flow versus formation of a connected gas stream. It outlines different approaches to modelling gas movement from a repository, with simple semi-analytical models furnishing physical insights into the factors controlling gas migration in the absence of directly applicable experimental data, and more comprehensive numerical computations allowing the exploration of more detailed behaviour when appropriate data is obtained. If gas can induce groundwater movement, this could accelerate the transport of water-borne contaminants. Processes by which this could occur are noted, and the current status of work on possible effects of gas migration on groundwater movement in fractured hard rocks is indicated. 14 refs., 4 figs

  20. Far-field radially polarized focal spot from plasmonic spiral structure combined with central aperture antenna

    Science.gov (United States)

    Mao, Lei; Ren, Yuan; Lu, Yonghua; Lei, Xinrui; Jiang, Kang; Li, Kuanguo; Wang, Yong; Cui, Chenjing; Wen, Xiaolei; Wang, Pei

    2016-03-01

    Manipulation of a vector micro-beam with an optical antenna has significant potentials for nano-optical technology applications including bio-optics, optical fabrication, and quantum information processing. We have designed and demonstrated a central aperture antenna within an Archimedean spiral that extracts the bonding plasmonic field from a surface to produce a new vector focal spot in far-field. The properties of this vector focal field are revealed by confocal microscopy and theoretical simulations. The pattern, polarization and phase of the focal field are determined by the incident light and by the chirality of the Archimedean spiral. For incident light with right-handed circular polarization, the left-handed spiral (one-order chirality) outputs a micro-radially polarized focal field. Our results reveal the relationship between the near-field and far-field distributions of the plasmonic spiral structure, and the structure has the potential to lead to advances in diverse applications such as plasmonic lenses, near-field angular momentum detection, and optical tweezers.

  1. Far Field measurement in the focal plane of a lens : a cautionary note

    CERN Document Server

    Suret, Pierre

    2013-01-01

    We study theoretically the accuracy of the method based on the Fourier property of lenses that is commonly used for the far field measurement. We consider a simple optical setup in which the far-field intensity pattern of a light beam passing through a Kerr medium is recorded by a CCD camera located in the back focal plane of a thin lens. Using Fresnel diffraction formula and numerical computations, we investigate the influence of a slight longitudinal mispositioning of the CCD camera. Considering a coherent gaussian beam, we show that a tiny error in the position of the CCD camera can produce a narrowing of the transverse pattern instead of the anticipated and well-understood broadening. This phenomenon is robust enough to persist for incoherent beams strongly modified by the presence of noise. The existence of this phenomenon has important consequences for the design and the realization of experiments in the field of optical wave turbulence in which equilibrium spectra reached by incoherent waves can only b...

  2. Far-field nanoscale infrared spectroscopy of vibrational fingerprints of molecules with graphene plasmons

    Science.gov (United States)

    Hu, Hai; Yang, Xiaoxia; Zhai, Feng; Hu, Debo; Liu, Ruina; Liu, Kaihui; Sun, Zhipei; Dai, Qing

    2016-07-01

    Infrared spectroscopy, especially for molecular vibrations in the fingerprint region between 600 and 1,500 cm-1, is a powerful characterization method for bulk materials. However, molecular fingerprinting at the nanoscale level still remains a significant challenge, due to weak light-matter interaction between micron-wavelengthed infrared light and nano-sized molecules. Here we demonstrate molecular fingerprinting at the nanoscale level using our specially designed graphene plasmonic structure on CaF2 nanofilm. This structure not only avoids the plasmon-phonon hybridization, but also provides in situ electrically-tunable graphene plasmon covering the entire molecular fingerprint region, which was previously unattainable. In addition, undisturbed and highly confined graphene plasmon offers simultaneous detection of in-plane and out-of-plane vibrational modes with ultrahigh detection sensitivity down to the sub-monolayer level, significantly pushing the current detection limit of far-field mid-infrared spectroscopies. Our results provide a platform, fulfilling the long-awaited expectation of high sensitivity and selectivity far-field fingerprint detection of nano-scale molecules for numerous applications.

  3. FUNMIG. Fundamental processes of radionuclide migration in salt rock far field. A natural analogue study

    International Nuclear Information System (INIS)

    The results presented in this report are mainly based on the work performed within the Research and Technology Development Component (RTDC) 5 ''Processes and transport studies relevant for salt rock disposal concepts'' of the Integrated Project ''Fundamental processes of radionuclide migration'' (FUNMIG). This report firstly gives a brief overview on the whole integrated project FUNMIG and highlights some major results before describing in detail the work and results from RTDC 5. The FUNMIG project in general dealt with all aspects of radionuclide migration from a deep geological radioactive waste repository to the biosphere and the application of the results to the safety case /BUC 10/. The project focussed on radionuclide migration processes in the far field of a nuclear waste repository. This included investigations on basic processes applicable to all types of host rock and disposal concepts as well as investigations on key issues for the three host-rock types clay, crystalline and salt presently investigated in Europe. In case of the salt-option the overburden of the salt formation itself is considered to represent the so-called far field. Hence migration processes in such sedimentary formations have been addressed. (orig.)

  4. Merit function for the evaluation of color uniformity in the far field of LED spot lights

    Science.gov (United States)

    Teupner, Anne; Bergenek, Krister; Wirth, Ralph; Miñano, Juan C.; Benítez, Pablo

    2014-02-01

    The scope of the present paper is the derivation of a merit function which predicts the visual perception of LED spot lights. The color uniformity level Usl is described by a linear regression function of the spatial color distribution in the far field. Hereby, the function is derived from four basic functions. They describe the color uniformity of spot lights through different features. The result is a reliable prediction for the perceived color uniformity in spot lights. A human factor experiment was performed to evaluate the visual preferences for colors and patterns. A perceived rank order was derived from the subjects' answers and compared with the four basic functions. The correlation between the perceived rank order and the basic functions was calculated resulting in the definition of the merit function Usl. The application of this function is shown by a comparison of visual evaluations and measurements of LED retrofit spot lamps. The results enable a prediction of color uniformity levels of simulations and measurements concerning the visual perception. The function provides a possibility to evaluate the far field of spot lights without individual subjective judgment.

  5. Comparison of predicted far-field temperatures for discrete and smeared heat sources

    International Nuclear Information System (INIS)

    A fundamental concern in the design of the potential repository at Yucca Mountain, Nevada is the response of the host rock to the emplacement of heat-generating waste. The thermal perturbation of the rock mass has implications regarding the structural hydrologic, and geochemical performance of the potential repository. The phenomenological coupling of many of these performance aspects makes repository thermal modeling a difficult task. For many of the more complex, coupled models, it is often necessary to reduce the geometry of the potential repository to a smeared heat-source approximation. Such simplifications have impacts on induced thermal profiles that in turn may influence other predicted responses through one- or two-way thermal couplings. The effect of waste emplacement layout on host-rock thermal response was chosen as the primary emphasis of this study. Using a consistent set of modeling and input assumptions, far-field thermal response predictions were made for discrete-source as well as plate source approximations of the repository geometry. Input values used in the simulations are consistent with a design-basis areal power density (APD) of 80 kW/acre as would be achieved assuming a 2010 emplacement start date, a levelized receipt schedule, and a limitation on available area as published in previous design studies. It was found that edge effects resulting from general repository layout have a significant influence on the shapes and extents of isothermal profiles, and should be accounted for in far-field modeling efforts

  6. Metal/Polymer Based Stretchable Antenna for Constant Frequency Far-Field Communication in Wearable Electronics

    KAUST Repository

    Hussain, Aftab M.

    2015-10-06

    Body integrated wearable electronics can be used for advanced health monitoring, security, and wellness. Due to the complex, asymmetric surface of human body and atypical motion such as stretching in elbow, finger joints, wrist, knee, ankle, etc. electronics integrated to body need to be physically flexible, conforming, and stretchable. In that context, state-of-the-art electronics are unusable due to their bulky, rigid, and brittle framework. Therefore, it is critical to develop stretchable electronics which can physically stretch to absorb the strain associated with body movements. While research in stretchable electronics has started to gain momentum, a stretchable antenna which can perform far-field communications and can operate at constant frequency, such that physical shape modulation will not compromise its functionality, is yet to be realized. Here, a stretchable antenna is shown, using a low-cost metal (copper) on flexible polymeric platform, which functions at constant frequency of 2.45 GHz, for far-field applications. While mounted on a stretchable fabric worn by a human subject, the fabricated antenna communicated at a distance of 80 m with 1.25 mW transmitted power. This work shows an integration strategy from compact antenna design to its practical experimentation for enhanced data communication capability in future generation wearable electronics.

  7. Enhanced Transmission of Light and Particle Waves through Subwavelength Nanoapertures by Far-Field Interference

    CERN Document Server

    Kukhlevsky, S V

    2007-01-01

    Subwavelength aperture arrays in thin metal films can enable enhanced transmission of light and matter (atom) waves. The phenomenon relies on resonant excitation of the plasmon or matter surface waves. We show another mechanism that provides a great transmission enhancement of the light and de Broglie particle waves not by coupling to the surface waves but by the interference of diffracted evanescent waves in the far-field zone. Verification of the mechanism is presented by comparison with recently published data. The Wood anomalies in transmission spectra of gratings, a long standing problem in optics, follow naturally from interference properties of the model. The new point, in comparison to other models, is the prediction of the Wood anomaly in a classical Young-type two-slit system.

  8. Far-field characterization of the thermal dynamics in lasing microspheres

    CERN Document Server

    Ramirez, J M; Capuj, N E; Berencen, Y; Pitanti, A; Garrido, B; Tredicucci, A

    2015-01-01

    This work reports the dynamical thermal behavior of lasing microspheres placed on a dielectric substrate while they are homogeneously heated-up by the top-pump laser used to excite the active medium. The lasing modes are collected in the far-field and their temporal spectral traces show characteristic lifetimes of about 2 ms. The latter values scale with the microsphere radius and are independent of the pump power in the studied range. Finite-Element Method simulations reproduce the experimental results, revealing that the thermal dynamics is dominated by the heat dissipated towards the substrate through the medium surrounding the contact point. The characteristic system scale regarding thermal transport is of few hundreds of nanometers, thus enabling an effective toy model for investigating heat conduction in non-continuum gaseous media and near-field radiative energy transfer.

  9. Optical far-field super-resolution microscopy using nitrogen vacancy center ensemble in bulk diamond

    CERN Document Server

    Li, Shen; Zhao, Bo-Wen; Dong, Yang; Zou, Chong-Wen; Guo, Guang-Can; Sun, Fang-Wen

    2016-01-01

    We demonstrate an optical far-field super-resolution microscopy using array of nitrogen vacancy centers in bulk diamond as near-field optical probes. The local optical field, which transmits through the nanostructures on the diamond surface, is measured by detecting the charge state conversion of nitrogen vacancy center. And the locating of nitrogen vacancy center with spatial resolution of 6.1 nm is realized with the charge state depletion nanoscopy. The nanostructures on the surface of diamond are then imaged with resolution below optical diffraction limit. The results offer an approach to built a general-purpose optical super-resolution microscopy and a convenient platform for high spatial resolution quantum sensing with nitrogen vacancy center.

  10. Far-field nanoscale infrared spectroscopy of vibrational fingerprints of molecules with graphene plasmons

    CERN Document Server

    Hu, Hai; Zhai, Feng; Hu, Debo; Liu, Ruina; Liu, Kaihui; Sun, Zhipei; Dai, Qing

    2016-01-01

    Infrared spectroscopy, especially for molecular vibrations in the fingerprint region between 600 and 1500 cm-1, is a powerful characterization method for bulk materials. However, molecular fingerprinting at the nanoscale level still remains a significant challenge, due to weak light-matter interaction between micron-wavelengthed infrared light and nano-sized molecules. Here, we demonstrate molecular fingerprinting at the nanoscale level using our specially designed graphene plasmonic structure on CaF2 nanofilm. This structure not only avoids the plasmon-phonon hybridization, but also provides in situ electrically-tunable graphene plasmon covering the entire infrared fingerprint region, which was previously unattainable. In addition, undisturbed and highly-confined graphene plasmon offers simultaneous detection of in-plane and out-of-plane vibrational modes with ultrahigh detection sensitivity down to the sub-monolayer level, significantly pushing the current detection limit of far-field mid-infrared spectrosc...

  11. Advances in the study of far-field phenomena affecting repository performance

    International Nuclear Information System (INIS)

    Studies of far-field phenomena affecting repository performance have focussed on the role of fractures and other heterogeneities in the potential transport of radioactive solutes from the repository to the biosphere. The present paper summarizes two recent advances in the subject: the channeling model for the understanding and analysis tracer transport in variable-aperture fractures and the modeling of coupled thermo-hydro-mechanical processes in geologic formation around a repository. The paper concludes with remarks on the need for duality in the approach to performance assessment. One line of the duality is fundamental studies and the other, goal-oriented assessment to satisfy regulatory requirements. 15 refs., 10 figs., 1 tab

  12. Exploiting spatiotemporal degrees of freedom for far field subwavelength focusing using time reversal in fractals

    CERN Document Server

    Dupré, Matthieu; Fink, Mathias; Lerosey, Geoffroy

    2016-01-01

    Materials which possess a high local density of states varying at a subwavelength scale theoretically permit to focus waves onto focal spots much smaller than the free space wavelength. To do so metamaterials -manmade composite media exhibiting properties not available in nature- are usually considered. However this approach is limited to narrow bandwidths due to their resonant nature. Here, we prove that it is possible to use a fractal resonator alongside time reversal to focus microwaves onto $\\lambda/15$ subwavelength focal spots from the far field, on extremely wide bandwidths. We first numerically prove that this approach can be realized using a multiple channel time reversal mirror, that utilizes all the degrees of freedom offered by the fractal resonator. Then we experimentally demonstrate that this approach can be drastically simplified by coupling the fractal resonator to a complex medium, here a cavity, that efficiently converts its spatial degrees of freedom into temporal ones. This allows to achie...

  13. Far-field and near-field investigation of plasmonic-photonic hybrid laser mode

    CERN Document Server

    Zhang, Taiping; Callard, Ségolène; jamois, Cecile; Letartre, Xavier; Chevalier, Celine; Rojo-Romeo, Pedro; Devif, Brice; Viktorovitch, Pierre

    2014-01-01

    We report an approach to achieve this goal via build a plasmonic-dielectric photonic hybrid system. We induce a defect mode based photonic crystal (PC) cavity to work as a intermedium storage as well as a near-field light source to excite a plasmonic nanoantenna (NA). In this way, a plasmonic-photonic nano-laser source is created in present experiment. The coupling condition between the two elements is investigated in far-field and near-field level. We found that the NA reduces the Q-factor of the PC-cavity. Meanwhile, the NA concentrates and enhances the laser emission of the PC-cavity. This novel hybrid dielectric-plasmonic structure may open a new avenue in the generation of nano-light sources, which can be applied in areas such as optical information storage, non-linear optics, optical trapping and detection, integrated optics, etc.

  14. Strain Determination On Curved Surfaces Using Far-Field Objective Laser Speckles

    Science.gov (United States)

    Chiang, F. P.; Kin, C. C.

    1982-06-01

    Most of the laser speckle methods utilize subjective speckles in that speckles are recorded through a lens whose aperture determines the admitted spatial frequencies. Objective speckles are those intrinsically formed by the scattering wavelets. In this paper we propose the use of far-field objective speckles generated from a ground glass to measure surface displacement and strain. The object's surface is coated with a photosensitive material and placed inside the speckle field. Double exposure is made on the photosenstive coating before and after the application of load. Young's fringes are generated by probing the surface coating with a narrow laser beam. Surface strain can then be calculated from these fringes. The method can be applied to doubly-curved surfaces and opaque materials.

  15. An atmospheric backscatter model on wind measurements using far-field approximation method

    Institute of Scientific and Technical Information of China (English)

    SHU Weiping; ZHAO Zhengyu

    2007-01-01

    A backscatter model was developed for measuring wind field with the far-field approximation method.The theoretical computation and computer simulations with one spatial dimension show that this model can realistically describe the physical meaning and process of the three methods in wind measurements including the spaced antenna (SA) method,Doppler beam swing (DBS) method,and spaced interferometry (SI).The computational difficulties of the traditional theoretical model cannot only be smoothed away,but common characteristics and differences of the three methods can be compared deeply.The comparison of the numerical results between the Wuhan medium frequency (MF) radar (30° N,114° E) observation and the computer simulation of the full correlation analysis (FCA) of the SA method indicates that the two results agree very well and this model has practical application.

  16. Generalization of susceptibility of RF systems through far-field pattern superposition

    Science.gov (United States)

    Verdin, B.; Debroux, P.

    2015-05-01

    The purpose of this paper is to perform an analysis of RF (Radio Frequency) communication systems in a large electromagnetic environment to identify its susceptibility to jamming systems. We propose a new method that incorporates the use of reciprocity and superposition of the far-field radiation pattern of the RF system and the far-field radiation pattern of the jammer system. By using this method we can find the susceptibility pattern of RF systems with respect to the elevation and azimuth angles. A scenario was modeled with HFSS (High Frequency Structural Simulator) where the radiation pattern of the jammer was simulated as a cylindrical horn antenna. The RF jamming entry point used was a half-wave dipole inside a cavity with apertures that approximates a land-mobile vehicle, the dipole approximates a leaky coax cable. Because of the limitation of the simulation method, electrically large electromagnetic environments cannot be quickly simulated using HFSS's finite element method (FEM). Therefore, the combination of the transmit antenna radiation pattern (horn) superimposed onto the receive antenna pattern (dipole) was performed in MATLAB. A 2D or 3D susceptibility pattern is obtained with respect to the azimuth and elevation angles. In addition, by incorporating the jamming equation into this algorithm, the received jamming power as a function of distance at the RF receiver Pr(Φr, θr) can be calculated. The received power depends on antenna properties, propagation factor and system losses. Test cases include: a cavity with four apertures, a cavity above an infinite ground plane, and a land-mobile vehicle approximation. By using the proposed algorithm a susceptibility analysis of RF systems in electromagnetic environments can be performed.

  17. Femtosecond refractive-index tailoring of an optical fiber and phase retrieval from far-field measurements

    DEFF Research Database (Denmark)

    Savolainen, Juha-Matti; Grüner-Nielsen, Lars; Kristensen, Poul; Balling, Peter

    2013-01-01

    A refractive-index change is written inside an optical fiber close to the end face by femtosecond laser light. The induced phase change is measured by analyzing the far-field intensity profiles before and after the irradiation.......A refractive-index change is written inside an optical fiber close to the end face by femtosecond laser light. The induced phase change is measured by analyzing the far-field intensity profiles before and after the irradiation....

  18. Radionuclide transport in the repository near-field and far-field

    Energy Technology Data Exchange (ETDEWEB)

    Poteri, A.; Nordman, H.; Pulkkanen, V.-M. [VTT Technical Research Centre of Finland, Espoo (Finland); Smith, P. [SAM Switzerland GmbH, (Switzerland)

    2014-01-15

    This report is a background report of the TURVA-2012 safety case report 'Assessment of Radionuclide Release Scenarios for the Repository System'. This report gives a comprehensive account of the modelling of radionuclide release from a defective canister and the subsequent migration to the surface groundwater system. The focus of this report is in the radionuclide migration both in the repository near-field and in the repository far-field. Radionuclide releases from the canister and migration through the repository near-field and far-field have also been analysed in the probabilistic sensitivity analysis based on the Monte Carlo simulation method. Those simulations are discussed in a separate report by Cormenzana. Calculation cases are derived from three different types of scenarios: (i) The base scenario that assumes a single initially defective canister located in a cautiously selected canister position, i.e. selecting the failed canister location such that radionuclide release and transport properties are conservative compared to the statistics over all canister locations. Migration processes and parameter values follow the most likely lines of evolution. Repository safety functions are assumed to perform according to the design basis. Calculation cases defined in the Assessment of Radionuclide Release Scenarios report are also supplemented by additional calculation cases that are aimed to study variability between different DFN realisations (additional BS-ALL cases), longitudinal dispersion (BS-RC-ld cases) and alternative realisations of the transport classes along the release paths (BS-RC-tc cases), (ii) Variant scenarios that study declined performance of the repository safety functions. These include enhanced corrosion failure and degradation of the buffer under variant geochemical conditions (iii) Disturbance scenarios that analyse influences of unlikely events on the radionuclide release and migration. Analysis of the variant and disturbance

  19. Radionuclide transport in the repository near-field and far-field

    International Nuclear Information System (INIS)

    This report is a background report of the TURVA-2012 safety case report 'Assessment of Radionuclide Release Scenarios for the Repository System'. This report gives a comprehensive account of the modelling of radionuclide release from a defective canister and the subsequent migration to the surface groundwater system. The focus of this report is in the radionuclide migration both in the repository near-field and in the repository far-field. Radionuclide releases from the canister and migration through the repository near-field and far-field have also been analysed in the probabilistic sensitivity analysis based on the Monte Carlo simulation method. Those simulations are discussed in a separate report by Cormenzana. Calculation cases are derived from three different types of scenarios: (i) The base scenario that assumes a single initially defective canister located in a cautiously selected canister position, i.e. selecting the failed canister location such that radionuclide release and transport properties are conservative compared to the statistics over all canister locations. Migration processes and parameter values follow the most likely lines of evolution. Repository safety functions are assumed to perform according to the design basis. Calculation cases defined in the Assessment of Radionuclide Release Scenarios report are also supplemented by additional calculation cases that are aimed to study variability between different DFN realisations (additional BS-ALL cases), longitudinal dispersion (BS-RC-ld cases) and alternative realisations of the transport classes along the release paths (BS-RC-tc cases), (ii) Variant scenarios that study declined performance of the repository safety functions. These include enhanced corrosion failure and degradation of the buffer under variant geochemical conditions (iii) Disturbance scenarios that analyse influences of unlikely events on the radionuclide release and migration. Analysis of the variant and disturbance scenarios

  20. Vectorial Structure of Non-Paraxial Linearly Polarized Gaussian Beam in Far Field

    Institute of Scientific and Technical Information of China (English)

    ZHOU Guo-Quan; CHEN Liang; NI Yong-Zhou

    2006-01-01

    @@ According to the vectorial structure of non-paraxial electromagnetic beams and the method of stationary phase,the analytical TE and TM terms of non-paraxial linearly polarized Gaussian beam are presented in the far field.The influence of linearly polarized angle on the relative energy flux distributions of the whole beam and its TE and TM terms is studied. The beam spot of the TE term is perpendicular to the direction of linearly polarized angle, while that of the TM term coincides with the direction of linearly polarized angle. The whole beam spot is elliptical, and the long axis is located at the direction of linearly polarized angle. The relative energy flux distribution of the TE term is relatively centralized in the direction perpendicular to the linearly polarized angle.While that of the TM term is relatively centralized in the direction of linearly polarized angle. To obtain the isolated TM and TE terms, a polarizer should be put at the long and the short axis of the whole beam. spot,respectively.

  1. Probabilistic tsunami hazard assessment at Seaside, Oregon, for near-and far-field seismic sources

    Science.gov (United States)

    Gonzalez, F.I.; Geist, E.L.; Jaffe, B.; Kanoglu, U.; Mofjeld, H.; Synolakis, C.E.; Titov, V.V.; Areas, D.; Bellomo, D.; Carlton, D.; Horning, T.; Johnson, J.; Newman, J.; Parsons, T.; Peters, R.; Peterson, C.; Priest, G.; Venturato, A.; Weber, J.; Wong, F.; Yalciner, A.

    2009-01-01

    The first probabilistic tsunami flooding maps have been developed. The methodology, called probabilistic tsunami hazard assessment (PTHA), integrates tsunami inundation modeling with methods of probabilistic seismic hazard assessment (PSHA). Application of the methodology to Seaside, Oregon, has yielded estimates of the spatial distribution of 100- and 500-year maximum tsunami amplitudes, i.e., amplitudes with 1% and 0.2% annual probability of exceedance. The 100-year tsunami is generated most frequently by far-field sources in the Alaska-Aleutian Subduction Zone and is characterized by maximum amplitudes that do not exceed 4 m, with an inland extent of less than 500 m. In contrast, the 500-year tsunami is dominated by local sources in the Cascadia Subduction Zone and is characterized by maximum amplitudes in excess of 10 m and an inland extent of more than 1 km. The primary sources of uncertainty in these results include those associated with interevent time estimates, modeling of background sea level, and accounting for temporal changes in bathymetry and topography. Nonetheless, PTHA represents an important contribution to tsunami hazard assessment techniques; viewed in the broader context of risk analysis, PTHA provides a method for quantifying estimates of the likelihood and severity of the tsunami hazard, which can then be combined with vulnerability and exposure to yield estimates of tsunami risk. Copyright 2009 by the American Geophysical Union.

  2. Reconstruction of far-field tsunami amplitude distributions from earthquake sources

    Science.gov (United States)

    Geist, Eric L.; Parsons, Thomas E.

    2016-01-01

    The probability distribution of far-field tsunami amplitudes is explained in relation to the distribution of seismic moment at subduction zones. Tsunami amplitude distributions at tide gauge stations follow a similar functional form, well described by a tapered Pareto distribution that is parameterized by a power-law exponent and a corner amplitude. Distribution parameters are first established for eight tide gauge stations in the Pacific, using maximum likelihood estimation. A procedure is then developed to reconstruct the tsunami amplitude distribution that consists of four steps: (1) define the distribution of seismic moment at subduction zones; (2) establish a source-station scaling relation from regression analysis; (3) transform the seismic moment distribution to a tsunami amplitude distribution for each subduction zone; and (4) mix the transformed distribution for all subduction zones to an aggregate tsunami amplitude distribution specific to the tide gauge station. The tsunami amplitude distribution is adequately reconstructed for four tide gauge stations using globally constant seismic moment distribution parameters established in previous studies. In comparisons to empirical tsunami amplitude distributions from maximum likelihood estimation, the reconstructed distributions consistently exhibit higher corner amplitude values, implying that in most cases, the empirical catalogs are too short to include the largest amplitudes. Because the reconstructed distribution is based on a catalog of earthquakes that is much larger than the tsunami catalog, it is less susceptible to the effects of record-breaking events and more indicative of the actual distribution of tsunami amplitudes.

  3. MARFA user's manual: Migration analysis of radionuclides in the far field

    International Nuclear Information System (INIS)

    The computer code Migration Analysis of Radionuclides in the Far Field (MARFA) uses a particle-based Monte Carlo method to simulate the transport of radionuclides in a sparsely fractured geological medium. The algorithm uses non-interacting particles to represent packets of radionuclide mass. These particles are moved through the system according to rules that mimic the underlying physical transport and retention processes. The physical processes represented in MARFA include advection, longitudinal dispersion, Fickian diffusion into an infinite or finite rock matrix, equilibrium sorption, decay, and in-growth. Because the algorithm uses non-interacting particles, the transport and retention processes are limited to those that depend linearly on radionuclide concentration. Multiple non-branching decay chains of arbitrary length are supported, as is full heterogeneity in the transport and retention properties. Two variants of the code are provided. These two versions differ in how particles are routed through the computational domain. In MARFA 3.2.3, transport is assumed to occur along a set of trajectories or pathways that originate at radionuclide source locations. The trajectories are intended to represent the movement of hypothetical, advectively transported groundwater tracers and are typically calculated by pathline tracing in a discrete fracture network flow code. The groundwater speed and retention properties along each pathway may change in time, but the pathway trajectories are fixed. MARFA 3.3.1 allows the transport effects of changing flow directions to be represented by abandoning the fixed pathways and performing node routing within MARFA. (orig.)

  4. MARFA user's manual: Migration analysis of radionuclides in the far field

    Energy Technology Data Exchange (ETDEWEB)

    Painter, S. [Los Alamos National Lab., NM (United States); Mancillas, J. [Southwest Research Inst., San Antonio TX (United States)

    2013-12-15

    The computer code Migration Analysis of Radionuclides in the Far Field (MARFA) uses a particle-based Monte Carlo method to simulate the transport of radionuclides in a sparsely fractured geological medium. The algorithm uses non-interacting particles to represent packets of radionuclide mass. These particles are moved through the system according to rules that mimic the underlying physical transport and retention processes. The physical processes represented in MARFA include advection, longitudinal dispersion, Fickian diffusion into an infinite or finite rock matrix, equilibrium sorption, decay, and in-growth. Because the algorithm uses non-interacting particles, the transport and retention processes are limited to those that depend linearly on radionuclide concentration. Multiple non-branching decay chains of arbitrary length are supported, as is full heterogeneity in the transport and retention properties. Two variants of the code are provided. These two versions differ in how particles are routed through the computational domain. In MARFA 3.2.3, transport is assumed to occur along a set of trajectories or pathways that originate at radionuclide source locations. The trajectories are intended to represent the movement of hypothetical, advectively transported groundwater tracers and are typically calculated by pathline tracing in a discrete fracture network flow code. The groundwater speed and retention properties along each pathway may change in time, but the pathway trajectories are fixed. MARFA 3.3.1 allows the transport effects of changing flow directions to be represented by abandoning the fixed pathways and performing node routing within MARFA. (orig.)

  5. Modulation and amplification of radiative far field heat transfer: Towards a simple radiative thermal transistor

    Energy Technology Data Exchange (ETDEWEB)

    Joulain, Karl; Ezzahri, Younès; Drevillon, Jérémie [Institut Pprime, Université de Poitiers-CNRS-ENSMA, UPR 3346, ENSIP Bâtiment B25, 2 Rue Pierre Brousse, TSA 41105, 86073 Poitiers Cedex 9 (France); Ben-Abdallah, Philippe [Laboratoire Charles Fabry, UMR 8501, Institut d' optique, CNRS, Université Paris-Sud 11, 2 Avenue Augustin Fresnel, 91127 Palaiseau (France)

    2015-03-30

    We show in this article that phase change materials (PCM) exhibiting a phase transition between a dielectric state and a metallic state are good candidates to perform modulation as well as amplification of radiative thermal flux. We propose a simple situation in plane parallel geometry where a so-called radiative thermal transistor could be achieved. In this configuration, we put a PCM between two blackbodies at different temperatures. We show that the transistor effect can be achieved easily when this material has its critical temperature between the two blackbody temperatures. We also see that the more the material is reflective in the metallic state, the more switching effect is realized, whereas the more PCM transition is stiff in temperature, the more thermal amplification is high. We finally take the example of VO{sub 2} that exhibits an insulator-metallic transition at 68 °C. We show that a demonstrator of a radiative transistor could easily be achieved in view of the heat flux levels predicted. Far-field thermal radiation experiments are proposed to back the results presented.

  6. Optimal placement of active braces by using PSO algorithm in near- and far-field earthquakes

    Science.gov (United States)

    Mastali, M.; Kheyroddin, A.; Samali, B.; Vahdani, R.

    2016-03-01

    One of the most important issues in tall buildings is lateral resistance of the load-bearing systems against applied loads such as earthquake, wind and blast. Dual systems comprising core wall systems (single or multi-cell core) and moment-resisting frames are used as resistance systems in tall buildings. In addition to adequate stiffness provided by the dual system, most tall buildings may have to rely on various control systems to reduce the level of unwanted motions stemming from severe dynamic loads. One of the main challenges to effectively control the motion of a structure is limitation in distributing the required control along the structure height optimally. In this paper, concrete shear walls are used as secondary resistance system at three different heights as well as actuators installed in the braces. The optimal actuator positions are found by using optimized PSO algorithm as well as arbitrarily. The control performance of buildings that are equipped and controlled using the PSO algorithm method placement is assessed and compared with arbitrary placement of controllers using both near- and far-field ground motions of Kobe and Chi-Chi earthquakes.

  7. Steering far-field spin-dependent splitting of light by inhomogeneous anisotropic media

    CERN Document Server

    Ling, Xiaohui; Luo, Hailu; Wen, Shuangchun

    2012-01-01

    An inhomogeneous anisotropic medium with specific structure geometry can apply tunable spin-dependent geometrical phase to the light passing through the medium, and thus can be used to steer the spin-dependent splitting (SDS) of light. In this paper, we exemplify this inference by the $q$-plate, an inhomogeneous anisotropic medium. It is demonstrated that when a linearly polarized light beam normally passes through a $q$-plate, $k$-space SDS first occurs, and then the real-space SDS in the far-field focal plane of a converging lens is distinguishable. Interestingly, the SDS, described by the normalized Stokes parameter $S_3$, shows a multi-lobe and rotatable splitting pattern with rotational symmetry. Further, by tailoring the structure geometry of $q$-plate or/and incident polarization angle of light, the lobe number and the rotation angle both are tunable. Our result suggests that the $q$-plate can serve as potential devices for manipulating the photon spin states and enable applications such as in nano-opt...

  8. Modulation and amplification of radiative far field heat transfer: Towards a simple radiative thermal transistor

    International Nuclear Information System (INIS)

    We show in this article that phase change materials (PCM) exhibiting a phase transition between a dielectric state and a metallic state are good candidates to perform modulation as well as amplification of radiative thermal flux. We propose a simple situation in plane parallel geometry where a so-called radiative thermal transistor could be achieved. In this configuration, we put a PCM between two blackbodies at different temperatures. We show that the transistor effect can be achieved easily when this material has its critical temperature between the two blackbody temperatures. We also see that the more the material is reflective in the metallic state, the more switching effect is realized, whereas the more PCM transition is stiff in temperature, the more thermal amplification is high. We finally take the example of VO2 that exhibits an insulator-metallic transition at 68 °C. We show that a demonstrator of a radiative transistor could easily be achieved in view of the heat flux levels predicted. Far-field thermal radiation experiments are proposed to back the results presented

  9. EM Modeling of Far-Field Radiation Patterns for Antennas on the GMA-TT UAV

    Science.gov (United States)

    Mackenzie, Anne I.

    2015-01-01

    To optimize communication with the Generic Modular Aircraft T-Tail (GMA-TT) unmanned aerial vehicle (UAV), electromagnetic (EM) simulations have been performed to predict the performance of two antenna types on the aircraft. Simulated far-field radiation patterns tell the amount of power radiated by the antennas and the aircraft together, taking into account blockage by the aircraft as well as radiation by conducting and dielectric portions of the aircraft. With a knowledge of the polarization and distance of the two communicating antennas, e.g. one on the UAV and one on the ground, and the transmitted signal strength, a calculation may be performed to find the strength of the signal travelling from one antenna to the other and to check that the transmitted signal meets the receiver system requirements for the designated range. In order to do this, the antenna frequency and polarization must be known for each antenna, in addition to its design and location. The permittivity, permeability, and geometry of the UAV components must also be known. The full-wave method of moments solution produces the appropriate dBi radiation pattern in which the received signal strength is calculated relative to that of an isotropic radiator.

  10. SITE-94. Far-field rock mechanics modelling for nuclear waste disposal

    International Nuclear Information System (INIS)

    The objectives of the far-field rock mechanics study were to investigate the mechanical influence of thermal loading and glaciation on the stability and safety of a hypothetical repository. The Aespoe Hard Rock Laboratory test site was used as a target site for regional and local geology, in situ stress data and material properties. The study treated the rock mass as an assembly of discrete blocks defined by a number of major faults and fracture zones. Two computational models with 15 and 23 major faults and fracture zones were constructed and studied. Thermal loading due to waste emplacement and mechanical loading from a hypothetical glaciation/deglaciation cycle was applied in order to examine the global behaviour of the rock mass under such loading conditions. The problem was treated as a three-dimensional one, simulated by using the three-d distinct element method code 3DEC. From the numerical results, it was found that a maximum temperature of 48 deg C would be reached 200 years after the emplacement of the waste canisters. The average increase of maximum principal stress due to thermal loading is 9.5 MPa horizontally and 20.2 MPa vertically due to glaciation. The maximum shear displacement induced by thermal loading is 25 mm and 81.9 mm by glaciation. 15 refs

  11. Prediction of far-field wind turbine noise propagation with parabolic equation.

    Science.gov (United States)

    Lee, Seongkyu; Lee, Dongjai; Honhoff, Saskia

    2016-08-01

    Sound propagation of wind farms is typically simulated by the use of engineering tools that are neglecting some atmospheric conditions and terrain effects. Wind and temperature profiles, however, can affect the propagation of sound and thus the perceived sound in the far field. A better understanding and application of those effects would allow a more optimized farm operation towards meeting noise regulations and optimizing energy yield. This paper presents the parabolic equation (PE) model development for accurate wind turbine noise propagation. The model is validated against analytic solutions for a uniform sound speed profile, benchmark problems for nonuniform sound speed profiles, and field sound test data for real environmental acoustics. It is shown that PE provides good agreement with the measured data, except upwind propagation cases in which turbulence scattering is important. Finally, the PE model uses computational fluid dynamics results as input to accurately predict sound propagation for complex flows such as wake flows. It is demonstrated that wake flows significantly modify the sound propagation characteristics. PMID:27586709

  12. Structuring of photosensitive material below diffraction limit using far field irradiation

    Science.gov (United States)

    Yadavalli, Nataraja Sekhar; Saphiannikova, Marina; Lomadze, Nino; Goldenberg, Leonid M.; Santer, Svetlana

    2013-11-01

    In this paper, we report on in-situ atomic force microscopy (AFM) studies of topographical changes in azobenzene-containing photosensitive polymer films that are irradiated with light interference patterns. We have developed an experimental setup consisting of an AFM combined with two-beam interferometry that permits us to switch between different polarization states of the two interfering beams while scanning the illuminated area of the polymer film, acquiring corresponding changes in topography in-situ. This way, we are able to analyze how the change in topography is related to the variation of the electrical field vector within the interference pattern. It is for the first time that with a rather simple experimental approach a rigorous assignment can be achieved. By performing in-situ measurements we found that for a certain polarization combination of two interfering beams [namely for the SP (↕, ↔) polarization pattern] the topography forms surface relief grating with only half the period of the interference patterns. Exploiting this phenomenon we are able to fabricate surface relief structures with characteristic features measuring only 140 nm, by using far field optics with a wavelength of 491 nm. We believe that this relatively simple method could be extremely valuable to, for instance, produce structural features below the diffraction limit at high-throughput, and this could significantly contribute to the search of new fabrication strategies in electronics and photonics industry.

  13. Luminescent nanoparticle trapping with far-field optical fiber-tip tweezers.

    Science.gov (United States)

    Decombe, Jean-Baptiste; Valdivia-Valero, Francisco J; Dantelle, Géraldine; Leménager, Godefroy; Gacoin, Thierry; Colas des Francs, Gérard; Huant, Serge; Fick, Jochen

    2016-03-01

    We report stable and reproducible trapping of luminescent dielectric YAG:Ce(3+) nanoparticles with sizes down to 60 nm using far-field dual fiber tip optical tweezers. The particles are synthesized by a specific glycothermal route followed by an original protected annealing step, resulting in significantly enhanced photostability. The tweezers properties are analyzed by studying the trapped particles residual Brownian motion using video or reflected signal records. The trapping potential is harmonic in the transverse direction to the fiber axis, but reveals interference fringes in the axial direction. Large trapping stiffness of 35 and 2 pN μm(-1) W(-1) is measured for a fiber tip-to-tip distance of 3 μm and 300 nm and 60 nm particles, respectively. The forces acting on the nanoparticles are discussed within the dipolar approximation (gradient and scattering force contributions) or exact calculations using the Maxwell Stress Tensor formalism. Prospects for trapping even smaller particles are discussed. PMID:26883602

  14. The degenerating diffraction far-field propagation properties of the conical double half-Gaussian hollow beams

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    The far-field propagation properties of conical double half-Gaussian hollow beams in the condition of Collins formula are studied. Because of the cone angle of this kind of hollow beams, the diffraction is compensated and the inner diameter is turning bigger by the rule of geometric optics as the propagation distance is increasing, whereas the degenerating diffraction phenomenon is turned out. The far-field intensity distribution of the conical double half-Gaussian hollow beams in the condition of in-Collins formula is researched, and the results show that the far-field propagation properties can be depicted by this model. In the experiment, this kind of hollow beams are obtained by means of the dual-reflecting splitting optical system, and the inner diameter of the hollow beams is tested. The results show good agreement with the propagation theory in the condition of in-Collins formula.

  15. Far-field thermal-mechanical response of one- and two-storey repositories in Olkiluoto

    International Nuclear Information System (INIS)

    This report contains results from far-field temperature and deformation analysis of the spent nuclear fuel repository in Olkiluoto. The objective of the analyses was to determine dimensions of the tensile stressed bedrock above the repository near the ground surface. Tensile stresses may open fractures in rock mass and ground water flow may become faster, if suitable pressure differences exist and further, potential for radionuclide transport from leaking canisters becomes higher to upward direction, towards biosphere. In considering stress state far from the rectangular repository the most essential parameters are the length, width and depth of the repository and the total decay heat density. Other details, like vertical or horizontal orientation of canisters is of less importance when considering situation far from the repository. The absolute value of the stress locally in the bedrock depends remarkably on the existing compressive natural in-situ stresses, which have different values in various orientations. The estimated Olkiluoto in-situ stresses based on the site characterization investigations have been taken into account. The depth in tensioned volume extends in the one-storey repository to the depth of 94-107 m after about 300 years and in the two-storey repository to the depth of 129-146 m. The maximum tensile strain on the ground surface is about 0.00024 after about 600 years. Two-dimensional plane strain analyses gave conservative results when compared with more realistic three-dimensional analyses. When assuming the decreased deformation modulus for the rock mass due to the tensile cracking very conservatively the maximum depth of the tensile stressed rock is increased at most 10%. Ground uplift reaches its maximum of 6.9 cm about 1 230 years in the one-storey repository and 12.6 cm in the two-storey repository after about 1 400 years. (orig.)

  16. MARFA version 3.2.2 user's manual: migration analysis of radionuclides in the far field

    International Nuclear Information System (INIS)

    The computer code Migration Analysis of Radionuclides in the Far Field (MARFA) uses a particle-based Monte Carlo method to simulate the transport of radionuclides in a sparsely fractured geological medium. Transport in sparsely fractured rock is of interest because this medium may serve as a barrier to migration of radionuclides to the accessible environment. The physical processes represented in MARFA include advection, longitudinal dispersion, Fickian diffusion into an infinite or finite rock matrix, equilibrium sorption, decay, and in-growth. Multiple non-branching decay chains of arbitrary length are supported. This document describes the technical basis and input requirements for MARFA Version 3.2.2. MARFA Version 3.2 included new capabilities to accommodate transient flow velocities and sorption parameters, which are assumed to be piecewise constant in time. Version 3.2.1 was a minor change from Version 3.2 to allow a more convenient input format for sorption information. New capabilities in Version 3.2.2 include an option to specify a non-zero start time for the simulation, an optional input parameter that decreases the amount of retention within a single fracture because of flow channeling, and an alternative method for sampling the radionuclide source. MARFA uses the particle on random streamline segment algorithm /Painter et al. 2006/, a Monte Carlo algorithm combining time-domain random walk methods with pathway stochastic simulation. The algorithm uses non-interacting particles to represent packets of radionuclide mass. These particles are moved through the system according to rules that mimic the underlying physical transport and retention processes. The set of times required for particles to pass through the geological barrier are then used to reconstruct discharge rates (mass or activity basis). Because the algorithm uses non-interacting particles, the transport and retention processes are limited to those that depend linearly on radionuclide

  17. A glossary of terms used in research relating to the far-field environment of a radioactive waste repository

    International Nuclear Information System (INIS)

    The meanings of a number of words and phrases associated with research relating to the far-field environment of a radioactive waste repository are listed, and a definition of some quantities relevant to a mathematical description of radionuclide transport are given. (author)

  18. Emergence of spatiotemporal chaos arising from far-field breakup of spiral waves in the plankton ecological systems

    Institute of Scientific and Technical Information of China (English)

    Liu Quan-Xing; Sun Gui-Quan; Jin Zhen; Li Bai-Lian

    2009-01-01

    It has been reported that the minimal spatially extended phytoplankton-zooplankton system exhibits both tem-poral regular/chaotic behaviour, and spatiotemporal chaos in a patchy environment. As a further investigation by means of computer simulations and theoretical analysis, in this paper we observe that the spiral waves may exist and the spatiotcmporal chaos emerge when the parameters are within the mixed Turing Hopf bifurcation region, which arises from the far-field breakup of the spiral waves over a large range of diffusion coefficients of phytoplankton and zooplankton. Moreover, the spatiotemporal chaos arising from the far-field breakup of spiral waves does not gradually invade the whole space of that region. Our results arc confirmed by nonlinear bifurcation of wave trains. We also discuss ecological implications of these spatially structured patterns.

  19. Magnetoelectric-field microwave antennas: Far-field orbital angular momenta from chiral-topology near fields

    CERN Document Server

    Berezin, M; Shavit, R

    2015-01-01

    The near fields in the proximity of a small ferrite particle with magnetic-dipolar-mode (MDM) oscillations have space and time symmetry breakings. Such MDM originated fields, called magnetoelectric (ME) fields, carry both spin and orbital angular momentums. By virtue of unique topology, ME fields are strongly different from free-space electromagnetic (EM) fields. In this paper, we show that because of chiral topology of ME fields in a nearfield region, far-field orbital angular momenta (OAM) can be observed, both numerically and experimentally. In a single element antenna, we obtain a radiation pattern with an angular squint. We reveal that in far field microwave radiation a crucial role is played by the ME energy distribution in the near-field region.

  20. An Analysis of Mechanical Constraints when Using Superconducting Gravimeters for Far-Field Pre-Seismic Anomaly Detection

    OpenAIRE

    Shyh-Chin Lan; Teng-To Yu; Cheinway Hwang; and Ricky Kao

    2011-01-01

    Pre-seismic gravity anomalies from records obtained at a 1 Hz sampling rate from superconducting gravimeters (SG) around East Asia are analyzed. A comparison of gravity anomalies to the source parameters of associated earthquakes shows that the detection of pre-seismic gravity anomalies is constrained by several mechanical conditions of the seismic fault plane. The constraints of the far-field pre-seismic gravity amplitude perturbation were examined and the critical spatial relationship betwe...

  1. An Exact Line Integral Representation of the Physical Optics Far Field from Plane PEC Scatterers Illuminnated by Hertzian Dipoles

    DEFF Research Database (Denmark)

    Arslanagic, Samel; Meincke, Peter; Jørgensen, Erik;

    2003-01-01

    We derive a line integral representation of the physical optics scattered far field that yields the exact same result as the conventional surface radiation integral. This representation applies to a perfectly electrically conducting plane scatterer illuminated by electric or magnetic Hertzian...... dipoles. The source and observation points can take on almost arbitrary positions. To illustrate the exactness and efficiency of the new line integral, numerical comparisons with the conventional surface radiation integral are carried out....

  2. A New Intermediate Far-Field Spot Design for Polar Direct Drive at the National Ignition Facility

    Science.gov (United States)

    Cao, D.; Marozas, J. A.; Collins, T. J. B.; Radha, P. B.; McKenty, P. W.

    2015-11-01

    New far-field spot shapes were required and subsequently designed for the intermediate phase plates that will be fielded at the National Ignition Facility for polar-direct-drive laser-coupling experiments. Two-dimensional DRACO simulations using the new far-field spot design, coupled with appropriate ring energies and beam pointing angles, achieve a high neutron yield-over-clean (YOC) ratio with a clean hot-spot radius averaging 50 μm and a convergence ratio (CR) above 17 when performed with a 1300- μm plastic shell target driven by a 700-kJ double-picket pulse. This meets the original design objectives of maintaining a clean hot spot with a CR of 17. The presented far-field spot shapes are based on an ignition polar-direct-drive configuration modeled with the iSNB nonlocal thermal transport model. In addition, the use of Multi-FM during the first two pickets does not hinder performance, but instead slightly improves the neutron yield. This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-NA0001944.

  3. The simulation of far-field wavelets using frequency-domain air-gun array near-field wavelets

    Institute of Scientific and Technical Information of China (English)

    Song Jian-Guo; Deng Yong; Tong Xin-Xin

    2013-01-01

    Air-gun arrays are used in marine-seismic exploration. Far-field wavelets in subsurface media represent the stacking of single air-gun ideal wavelets. We derived single air-gun ideal wavelets using near-field wavelets recorded from near-field geophones and then synthesized them into far-field wavelets. This is critical for processing wavelets in marine-seismic exploration. For this purpose, several algorithms are currently used to decompose and synthesize wavelets in the time domain. If the traveltime of single air-gun wavelets is not an integral multiple of the sampling interval, the complex and error-prone resampling of the seismic signals using the time-domain method is necessary. Based on the relation between the frequency-domain phase and the time-domain time delay, we propose a method that first transforms the real near-field wavelet to the frequency domain via Fourier transforms;then, it decomposes it and composes the wavelet spectrum in the frequency domain, and then back transforms it to the time domain. Thus, the resampling problem is avoided and single air-gun wavelets and far-field wavelets can be reliably derived. The effect of ghost reflections is also considered, while decomposing the wavelet and removing the ghost reflections. Modeling and real data processing were used to demonstrate the feasibility of the proposed method.

  4. Analysis of RF Front-End Performance of Reconfigurable Antennas with RF Switches in the Far Field

    Directory of Open Access Journals (Sweden)

    Insu Yeom

    2014-01-01

    Full Text Available The RF front-end performances in the far-field condition of reconfigurable antennas employing two commonly used RF switching devices (PIN diodes and RF-MEMS switches were compared. Two types of antennas (monopole and slot representing general direct/coupled feed types were used for the reconfigurable antennas to compare the excited RF power to the RF switches by the reconfigurable antenna types. For the switching operation of the antennas, a biasing circuit was designed and embedded in the same antenna board, which included a battery to emphasize the antenna’s adaptability to mobile devices. The measurement results of each reconfigurable antenna (radiation patterns and return losses are presented in this study. The receiving power of the reference antenna was measured by varying the transmitting power of the reconfigurable antennas in the far-field condition. The receiving power was analyzed using the “Friis transmission equation” and compared for two switching elements. Based on the results of these measurements and comparisons, we discuss what constitutes an appropriate switch device and antenna type for reconfigurable antennas of mobile devices in the far-field condition.

  5. Thermo-mechanical modeling of continental rift evolution over mantle upwelling in presence of far-field stresses

    Science.gov (United States)

    Koptev, Alexander; Burov, Evgueni; Calais, Eric; Leroy, Sylvie; Gerya, Taras

    2016-04-01

    We conducted fully-coupled high resolution rheologically consistent 3D thermo-mechanical numerical models to investigate the processes of mantle-lithosphere interaction (MLI) in presence of preexisting far-field tectonic stresses. MLI-induced topography exhibits strongly asymmetric small-scale 3D features, such as rifts, flexural flank uplifts and complex faults structures. This suggests a dominant role of continental rheological structure and intra-plate stresses in controlling continental rifting and break-up processes above mantle upwelling while reconciling the passive (far-field tectonic stresses) versus active (plume-activated) rift concepts as our experiments show both processes in action. We tested different experiments by varying two principal controlling parameters: 1) horizontal extension velocity and 2) Moho temperature used as simplified indicator of the thermal and rheological lithosphere layering. An increase in the applied extension expectedly gives less localized deformation at lithospheric scale: the growth of external velocity from 1.5 mm/years to 6 mm/years leads to enlargement of the rift zones from 75-175 km to 150-425 km width. On the contrary, increasing of the lithospheric geotherm has an opposite effect leading to narrowing of the rift zone: the change of the Moho isotherm from 600°C to 800°C causes diminution of the rift width from 175-425 km to 75-150 km. Some of these finding are contra-intuitive in terms of usual assumptions. The models refer to strongly non-linear impact of far-field extension rates on timing of break-up processes. Experiments with relatively fast far-field extension (6 mm/years) show intensive normal fault localization in crust and uppermost mantle above the plume head at 15-20 Myrs after the onset of the experiment. When plume head material reaches the bottom of the continental crust (at 25 Myrs), the latter is rapidly ruptured (<1 Myrs) and several steady oceanic floor spreading centers develop. Slower (3 mm

  6. Producing any desired far-field mean irradiance pattern using a partially-coherent Schell-model source

    International Nuclear Information System (INIS)

    A new technique is presented to produce any desired mean far-field irradiance pattern using a partially-coherent Schell-model source. The new method differs from similar approaches in the literature by requiring only phase control. This permits the proposed approach to be easily implemented in the laboratory using a single spatial light modulator. The analytical development of the phase-only method is presented and discussed. Simulation and experimental results are presented to validate the proposed method. Applications for the new technique include free-space optical communications, material processing/manufacture, and particle trapping. (paper)

  7. Study of the surface and far fields of terahertz radiation generated by large-aperture photoconductive antennas

    Institute of Scientific and Technical Information of China (English)

    Zhang Tong-Yi; Cao Jun-Cheng

    2004-01-01

    We have studied analytically the temporal characteristics of terahertz radiation emitted from a biased largeaperture photoconductive antenna triggered by an ultrashort optical pulse. We have included the effects of the finite lifetime and transient mobility dynamics of photogenerated carriers in the analysis. Succinct explicit expressions are obtained for the emitted radiation in the surface field and in the far field. The dependence of the waveforms of the radiated field on the fluence and duration of triggering optical pulse, carrier relaxation time and carrier lifetime are discussed in detail using the obtained expressions.

  8. A Newton method for a simultaneous reconstruction of an interface and a buried obstacle from far-field data

    International Nuclear Information System (INIS)

    This paper is concerned with the inverse problem of scattering of time-harmonic acoustic waves from a penetrable and a buried obstacle. By introducing a related transmission scattering problem, a Newton iteration method is proposed to simultaneously reconstruct both the penetrable interface and the buried obstacle inside from far-field data. The main feature of our method is that we do not need to know the type of boundary conditions on the buried obstacle. In particular, the boundary condition on the buried obstacle can also be determined simultaneously by the method. Finally, numerical examples using multi-frequency data are carried out to illustrate the effectiveness of our method. (paper)

  9. On One-dimensional Compressible Navier-Stokes Equations with Degenerate Viscosity and Constant State at Far fields

    OpenAIRE

    Dou, Changsheng; Jiu, Quansen

    2012-01-01

    In this paper, we are concerned with the Cauchy problem for one-dimensional compressible isentropic Navier-Stokes equations with density-dependent viscosity $\\mu(\\rho)=\\rho^\\alpha (\\alpha>0)$ and pressure $P(\\rho)=\\rho^{\\gamma}\\ (\\gamma>1)$. We will establish the global existence and asymptotic behavior of weak solutions for any $\\alpha>0$ and $\\gamma>1$ under the assumption that the density function keeps a constant state at far fields. This enlarges the ranges of $\\alpha$ and $\\gamma$ and i...

  10. Towards an optical far-field measurement of higher-order multipole contributions to the scattering response of nanoparticles

    Energy Technology Data Exchange (ETDEWEB)

    Bauer, Thomas; Orlov, Sergej [Max Planck Institute for the Science of Light, Guenther-Scharowsky-Str. 1/Bldg. 24, 91058 Erlangen (Germany); Institute of Optics, Information and Photonics, University Erlangen-Nuremberg, Staudtstr. 7/B2, 91058 Erlangen (Germany); Leuchs, Gerd; Banzer, Peter, E-mail: peter.banzer@mpl.mpg.de [Max Planck Institute for the Science of Light, Guenther-Scharowsky-Str. 1/Bldg. 24, 91058 Erlangen (Germany); Institute of Optics, Information and Photonics, University Erlangen-Nuremberg, Staudtstr. 7/B2, 91058 Erlangen (Germany); Department of Physics, University of Ottawa, 25 Templeton St., Ottawa, Ontario K1N 6N5 (Canada)

    2015-03-02

    We experimentally show an all-optical multipolar decomposition of the lowest-order eigenmodes of a single gold nanoprism using azimuthally and radially polarized cylindrical vector beams. By scanning the particle through these tailored field distributions, the multipolar character of the eigenmodes gets encoded into 2D-scanning intensity maps even for higher-order contributions to the eigenmode that are too weak to be discerned in the direct far-field scattering response. This method enables a detailed optical mode analysis of individual nanoparticles.

  11. Benchmark Modeling of the Near-Field and Far-Field Wave Effects of Wave Energy Arrays

    Energy Technology Data Exchange (ETDEWEB)

    Rhinefrank, Kenneth E; Haller, Merrick C; Ozkan-Haller, H Tuba

    2013-01-26

    This project is an industry-led partnership between Columbia Power Technologies and Oregon State University that will perform benchmark laboratory experiments and numerical modeling of the near-field and far-field impacts of wave scattering from an array of wave energy devices. These benchmark experimental observations will help to fill a gaping hole in our present knowledge of the near-field effects of multiple, floating wave energy converters and are a critical requirement for estimating the potential far-field environmental effects of wave energy arrays. The experiments will be performed at the Hinsdale Wave Research Laboratory (Oregon State University) and will utilize an array of newly developed Buoys' that are realistic, lab-scale floating power converters. The array of Buoys will be subjected to realistic, directional wave forcing (1:33 scale) that will approximate the expected conditions (waves and water depths) to be found off the Central Oregon Coast. Experimental observations will include comprehensive in-situ wave and current measurements as well as a suite of novel optical measurements. These new optical capabilities will include imaging of the 3D wave scattering using a binocular stereo camera system, as well as 3D device motion tracking using a newly acquired LED system. These observing systems will capture the 3D motion history of individual Buoys as well as resolve the 3D scattered wave field; thus resolving the constructive and destructive wave interference patterns produced by the array at high resolution. These data combined with the device motion tracking will provide necessary information for array design in order to balance array performance with the mitigation of far-field impacts. As a benchmark data set, these data will be an important resource for testing of models for wave/buoy interactions, buoy performance, and far-field effects on wave and current patterns due to the presence of arrays. Under the proposed project we will initiate

  12. Towards an optical far-field measurement of higher-order multipole contributions to the scattering response of nanoparticles

    CERN Document Server

    Bauer, Thomas; Leuchs, Gerd; Banzer, Peter

    2014-01-01

    We experimentally show an all-optical multipolar decomposition of the lowest-order Eigenmodes of a single gold nanoprism using azimuthally and radially polarized cylindrical vector beams. By scanning the particle through these tailored field distributions, the multipolar character of the Eigenmodes gets encoded into 2D-scanning intensity maps even for higher-order contributions to the Eigenmode that are too weak to be discerned in the direct far-field scattering response. This method enables a detailed optical mode analysis of individual nanoparticles.

  13. Far field optical nanoscopy: How far can you go in nanometric characterization without resolving all the details?

    International Nuclear Information System (INIS)

    In the development of nanomaterials and biomaterials, new characterization techniques are required that overcome the challenges presented by the increasing dimensional ratio between the different entities to be studied and the growing complexity introduced by the use of heterogeneous materials and technologies. Diffraction limited far field optical nanoscopy techniques are receiving growing interest because of their ability to detect nanometer structures over very large fields and at high speed. We present a classification scheme of the different types of optical nanoscopy techniques. In particular, we highlight four categories of far field diffraction limited techniques based on increasing the contrast, measuring the phase, using deconvolution and using nano-markers. We demonstrate that by increasing the power of detectability, observability or measurability, a wealth of information concerning nanometric structures becomes available even though all the lateral details may not be resolved. For example, it is possible to determine the presence, the structure and orientation of nanostructures, to measure their density, position and 2D and 3D distribution and to measure nanometric surface roughness in bulk materials, surfaces, nano-layers, soft matter and cells. These techniques conserve all the advantages associated with classical imaging such as real time imaging, non-invasiveness, non-destructiveness and ease of use.

  14. Simulation of Far-Field Superresolution Fluorescence Imaging with Two-Color One-Photon Excitation of Reversible Photoactivatable Protein

    Institute of Scientific and Technical Information of China (English)

    WANG Chen; QIAO Ling-Ling; MAO Zheng-Le

    2011-01-01

    We propose to achieve far-field super-resolution imaging by using offset two-color one-photon (2C1P) excitation of reversible photoactivatable fluorescence proteins. Due to the distinctive photoswitching performance of the proteins, such as dronpa, the fluorescence emission will only come from the overlapped region of activation beam and excitation beam. The analysis solution of rate equation shows that the resolution of offset 2C1P microscope is "engineered" by laser power of excitation and activation beams and the power ratio between them. Superior lateral and transverse resolution is theoretically demonstrated compared with conventional fluorescence scanning microscopy.%@@ We propose to achieve far-field super-resolution imaging by using offset two-color one-photon(2C1P) excitation of reversible photoactivatable fluorescence proteins.Due to the distinctive photoswitching performance of the proteins,such as dronpa,the fluorescence emission will only come from the overlapped region of activation beam and excitation beam.The analysis solution of rate equation shows that the resolution of offset 2C1P microscope is "engineered" by laser power of excitation and activation beams and the power ratio between them.Superior lateral and transverse resolution is theoretically demonstrated compared with conventional fluorescence scanning microscopy.

  15. Description of the transport mechanisms and pathways in the far field of a KBS-3 type repository

    International Nuclear Information System (INIS)

    The main purpose of this document is to serve as a reference document for the far field radionuclide transport description within SKB 91. A conceptual description of far field transport in crystalline rock is given together with a discussion of the application of the stream tube concept. In this concept the transport in a complex tree-dimensional flow field is divided into a number of imaginary tubes which are modelled independently. The stream tube concept is used as the basis for the radionuclide calculations in SKB 91. Different mathematical models for calculating the transport of radionuclides in fractured rock are compared: advection dispersion models, channeling models and network models. In the SKB 91 project a dual-porosity continuum model based on the one dimensional advection-dispersion equation taking into account matrix diffusion, sorption in the rock matrix and radioactive chain decay. Furthermore, the data needed for the transport models is discussed and recommended ranges and central values are given. (42 refs.) (au)

  16. The emergence of seismic cycles from stress feedback between intra-plate faulting and far-field tectonic loading

    Science.gov (United States)

    So, Byung-Dal; Capitanio, Fabio A.

    2016-08-01

    Using numerical modeling we show the emergence of cyclic slip behavior of faults from stress feedback through an idealized fault, its surrounding plates and far-field tectonic stress. The tectonic stress is exerted on the fault through a force applied along an idealized plate margin, acting on the fault, resulting from the interactions of viscous embedding and external plates. We find that, in such coupled system, the interaction of plates results into feedback with periodic deformation, slip along the fault and episodic plate margin motions. The viscosity of the embedding and loading plates primarily control the stress-loading time and hence the slip recurrence interval. For an Earth-like range of lithospheric viscosities, we derive a power-law with negative exponent, -0.99 to -0.5, scaling the recurrence period with loading-rate, providing an explanation for the observables from paleoseismology and geodesy. The feedback between single fault and far-field stress that arises from interactions of deforming plates provides a context to understand the earthquake cycle within continents, while reconciling the short-term seismic deformation to the long-term plate tectonics frame.

  17. Mixed-mode toughness of human cortical bone containing a longitudinal crack in far-field compression.

    Science.gov (United States)

    Olvera, Diana; Zimmermann, Elizabeth A; Ritchie, Robert O

    2012-01-01

    Bone is generally loaded under multiaxial conditions in vivo; as it invariably contains microcracks, this leads to complex mixed-mode stress-states involving combinations of tension, compression and shear. In previous work on the mixed-mode loading of human cortical bone (using an asymmetric bend test geometry), we found that the bone toughness was lower when loaded in far-field shear than in tension (opposite to the trend in most brittle materials), although only for the transverse orientation. This is a consequence of the competition between preferred mechanical vs. microstructural crack-path directions, the former dictated by the direction of the maximum mechanical "driving force" (which changes with the mode-mixity), and the latter by the "weakest" microstructural path (which in human bone is along the osteonal interfaces or cement lines). As most microcracks are oriented longitudinally, we investigate here the corresponding mixed-mode toughness of human cortical bone in the longitudinal (proximal-distal) orientation using a "double cleavage drilled compression" test geometry, which provides a physiologically-relevant loading condition for bone in that it characterizes the toughness of a longitudinal crack loaded in far-field compression. In contrast to the transverse toughness, results show that the longitudinal toughness, measured using the strain-energy release rate, is significantly higher in shear (mode II) than in tension (mode I). This is consistent, however, with the individual criteria of preferred mechanical vs. microstructural crack paths being commensurate in this orientation. PMID:22115793

  18. A Study of Near to Far Fields of JPL Deep Space Network (DSN) Antennas for RFI Analysis

    Science.gov (United States)

    Jamnejad, Vahraz

    2003-01-01

    This paper addresses the issue of calculating the gain and power distribution of DSN antennas in the Fresnel (middle zone) and Fraunhofer (far zone) as a function of the distance from the DSN antenna and the off-boresight angle. Calculating the near and mid fields of DSN antennas are of interest in the receive mode where the transmitting signals from nearby flying objects such as helicopters and airplanes transmitting in the DSN frequency range, interfere with the operation of sensitive RF receiving system of the DSN antennas, and in the transmit mode where fields from high-powered DSN antennas interfere with receivers on nearby flying objects such as helicopters or other systems. Computing the exact fields of a large DSN antenna is, in general, a very complicated and arduous task. Even far-field calculations, which are less complicated compared to near and mid zone fields, take considerable computer time. These calculations become even more involved and time-consuming in very near field and back field regions. We provide two approaches for addressing the radio frequency interference (RFI) issue. In this paper, actual fields in mid and far zones are calculated using a relatively simple formulation that is accurate enough for the purposes of RFI analysis. In a future paper, we study and develop simple reference models that provide upper limit bounds or envelopes of the far field patterns as a function of the antenna diameter and frequency, which can be used for obtaining the field at any given point in space.

  19. Demonstration of a white beam far-field neutron interferometer for spatially resolved small angle neutron scattering

    CERN Document Server

    Hussey, Daniel S; Yuan, Guangcui; Pushin, Dmitry; Sarenac, Dusan; Huber, Michael G; Jacobson, David L; LaManna, Jacob M; Wen, Han

    2016-01-01

    We provide the first demonstration that a neutron far-field interferometer can be employed to measure the microstructure of a sample. The interferometer is based on the moir\\'e pattern of two phase modulating gratings which was previously realized in hard x-ray and visible light experiments. The autocorrelation length of this interferometer, and hence the microstructure length scale that is probed, is proportional to the grating spacing and the neutron wavelength, and can be varied over several orders of magnitude for one pair of gratings. We compare our measurements of the change in visibility from monodisperse samples with calculations which show reasonable agreement. The potential advantages of a far-field neutron interferometer include high fringe visibility in a polychromatic beam (over 30 %), no requirement for an absorbing grating to resolve the interference fringes, and the ability to measure the microstructure in the length scale range of 100 nm to 10 \\mum by varying either the grating spacing or neu...

  20. Far field optical nanoscopy: How far can you go in nanometric characterization without resolving all the details?

    Energy Technology Data Exchange (ETDEWEB)

    Montgomery, Paul C., E-mail: paul.montgomery@unistra.fr [Laboratoire des Sciences de l’Ingénieur, de l’Informatique et de l’Imagerie (ICube), UDS-CNRS, UMR 7367, 23 rue du Loess, 67037 Strasbourg (France); Serio, Bruno; Anstotz, Freddy; Montaner, Denis [Laboratoire des Sciences de l’Ingénieur, de l’Informatique et de l’Imagerie (ICube), UDS-CNRS, UMR 7367, 23 rue du Loess, 67037 Strasbourg (France)

    2013-09-15

    In the development of nanomaterials and biomaterials, new characterization techniques are required that overcome the challenges presented by the increasing dimensional ratio between the different entities to be studied and the growing complexity introduced by the use of heterogeneous materials and technologies. Diffraction limited far field optical nanoscopy techniques are receiving growing interest because of their ability to detect nanometer structures over very large fields and at high speed. We present a classification scheme of the different types of optical nanoscopy techniques. In particular, we highlight four categories of far field diffraction limited techniques based on increasing the contrast, measuring the phase, using deconvolution and using nano-markers. We demonstrate that by increasing the power of detectability, observability or measurability, a wealth of information concerning nanometric structures becomes available even though all the lateral details may not be resolved. For example, it is possible to determine the presence, the structure and orientation of nanostructures, to measure their density, position and 2D and 3D distribution and to measure nanometric surface roughness in bulk materials, surfaces, nano-layers, soft matter and cells. These techniques conserve all the advantages associated with classical imaging such as real time imaging, non-invasiveness, non-destructiveness and ease of use.

  1. Non-paraxial contributions to the far-field pattern of surface-emitting lasers: a manifestation of the momentum-space wavefunctions of quantum billiards

    International Nuclear Information System (INIS)

    We investigated experimentally non-paraxial contributions to the high-order far-field pattern of large-area vertical-cavity surface-emitting lasers in order to explore by analogy the momentum-space wave distributions of quantum billiards. Our results reveal that non-paraxial contributions significantly influence the morphology of the high-order far-field pattern. A fast reliable method is developed for transforming the experimental far-field patterns to the correct Fourier transform of the corresponding near-field lasing modes. In this way we visualize the momentum-space (p–q) wavefunctions of quantum billiards

  2. Far-field linear optical superresolution via heterodyne detection in a higher-order local oscillator mode

    CERN Document Server

    Yang, Fan; Moiseev, E S; Simon, Christoph; Lvovsky, A I

    2016-01-01

    The Rayleigh limit has so far applied to all microscopy techniques that rely on linear optical interaction and detection in the far field. Here we demonstrate that detecting the light emitted by an object in higher-order transverse electromagnetic modes (TEMs) can help achieving sub-Rayleigh precision for a variety of microscopy-related tasks. Using optical heterodyne detection in TEM01, we measure the position of coherently and incoherently emitting objects to within 0.0015 and 0.012 of the Rayleigh limit, respectively, and determine the distance between two incoherently emitting slits positioned within 0.28 of the Rayleigh limit with a precision of 0.019 of the Rayleigh limit. Extending our technique to higher-order TEMs enables full imaging with resolution significantly below the Rayleigh limit in a way that is reminiscent of quantum tomography of optical states.

  3. The steady-state solution of dendritic growth from the undercooled binary alloy melt with the far field flow

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    The steady-state dendritic growth from the undercooled binary alloy melt with the far field flow is considered. By neglecting the interface energy, interface kinetics and buoyancy effects in the system, we obtaine the steady-state solution for the case of the large Schmidt number, in terms of the multiple variable expansion method. The changes of the temperature and concentration fields, the morphology of the interface, the normalization parameter and the Peclet number of the system induced by uniform external flow are derived. The results show that, compared with the system of dendritic growth from undercooled pure melt, the convective flow in the system of growth from undercooled binary alloy has stronger effects on the morphology of the interface. Nevertheless, the shape of the interface still remains nearly a paraboloid.

  4. The steady-state solution of dendritic growth from the undercooled binary alloy melt with the far field flow

    Institute of Scientific and Technical Information of China (English)

    CHEN MingWen; WANG ZiDong; XU JianJun

    2009-01-01

    The steady-state dendritic growth from the undercooled binary alloy melt with the far field flow is considered.By neglecting the interface energy,interface kinetics and buoyancy effects in the system,we obtaine the steady-state solution for the case of the large Schmidt number,in terms of the multiple variable expansion method.The changes of thtemperature and concentration fields,the morphology of the interface,the normalization parameter and the Peclet number of the system induced by uniform external flow are derived.The results show that,compared with the system of dendritic growth from undercooled pure melt,the convective flow in the system of growth from undercooled binary alloy has stronger effects on the morphology of the interface.Nevertheless,the shape of the interface still remains nearly a paraboloid.

  5. Far-field infrared super-resolution microscopy using picosecond time-resolved transient fluorescence detected IR spectroscopy

    Science.gov (United States)

    Sakai, Makoto; Kawashima, Yasutake; Takeda, Akihiro; Ohmori, Tsutomu; Fujii, Masaaki

    2007-05-01

    A new far-field infrared super-resolution microscopy combining laser fluorescence microscope and picosecond time-resolved transient fluorescence detected IR (TFD-IR) spectroscopy is proposed. TFD-IR spectroscopy is a kind of IR-visible/UV double resonance spectroscopy, and detects IR transitions by the transient fluorescence due to electronic transition originating from vibrationally excited level populated by IR light. IR images of rhodamine-6G solution and of fluorescent beads were clearly observed by monitoring the transient fluorescence. Super-resolution twice higher than the diffraction limit for IR light was achieved. The IR spectrum due to the transient fluorescence was also measured from spatial domains smaller than the diffraction limit.

  6. Apparatus comprising a tunable nanomechanical near-field grating and method for controlling far-field emission

    Science.gov (United States)

    Carr, Dustin Wade; Bogart, Gregory Robert

    2007-02-06

    A tunable nanomechanical near-field grating is disclosed which is capable of varying the intensity of a diffraction mode of an optical output signal. The tunable nanomechanical near-field grating includes two sub-gratings each having line-elements with width and thickness less than the operating wavelength of light with which the grating interacts. Lateral apertures in the two sub-gratings are formed from the space between one line-element of the first sub-grating and at least one line-element of the second sub-grating. One of the sub-gratings is capable of motion such that at least one of aperture width and aperture depth changes, causing a perturbation to the near-field intensity distribution of the tunable nanomechanical near-field grating and a corresponding change to the far-field emission of thereof.

  7. System studies in PA: Development of process influence diagram (PID) for SFR-1 repository near-field + far-field

    International Nuclear Information System (INIS)

    Scenario development is a key component of the performance assessment (PA) process for radioactive waste disposal, the primary objective being to ensure that all relevant factors associated with the future evolution of the repository system are properly considered in PA. As part of scenario development, a list of features, events and processes (FEPs) are identified and assembled, representing the Process System, with interactions/influences between FEPs incorporated in a Process Influence Diagram (PID). This report documents the technical work conducted between 1997 and the end of 1999 under the Systems Studies Project. The overall objective of this project has been the construction of a PID for the SFR-1 repository (final repository for reactor waste), this PID being the first stage in the identification of scenarios to describe future evolution of this repository. The PIDs discussed in this report have been created using two software applications: existing commercial software (Business Modeller, Infotool AB. Stockholm, Sweden) and, more recently, a newly developed software tool SPARTA (Enviros QuantiSci, Henley, U.K.). Although the focus of this report is on the application of SPARTA to PID development, it is important to document the work carried out prior to SPARTA being available, in order to provide a complete record of the entire SFR-1 PID development effort as well as preserving the context of the multi-year project. Following a description of the different disposal sections of the SFR-1 and the various near-field barriers, the sequential development (i.e. near-field of Silo, BMA, BLA, BTF sections; far-field; integrated near-field + far-field) of the PID for SFR-1 repository system using Business Modeller is described. Owing to the complexity of the repository, in terms of number of both different disposal sections (Silo, BLA, BMA, BTF) and barriers associated with each section, the two-dimensional (2D) PID created for SFR-1 using Business Modeller is

  8. Passive Localization of Mixed Far-Field and Near-Field Sources without Estimating the Number of Sources

    Directory of Open Access Journals (Sweden)

    Jian Xie

    2015-02-01

    Full Text Available This paper presents a novel algorithm for the localization of mixed far-field sources (FFSs and near-field sources (NFSs without estimating the source number. Firstly, the algorithm decouples the direction-of-arrival (DOA estimation from the range estimation by exploiting fourth-order spatial-temporal cumulants of the observed data. Based on the joint diagonalization structure of multiple spatial-temporal cumulant matrices, a new one-dimensional (1-D spatial spectrum function is derived to generate the DOA estimates of both FFSs and NFSs. Then, the FFSs and NFSs are identified and the range parameters of NFSs are determined via beamforming technique. Compared with traditional mixed sources localization algorithms, the proposed algorithm avoids the performance deterioration induced by erroneous source number estimation. Furthermore, it has a higher resolution capability and improves the estimation accuracy. Computer simulations are implemented to verify the effectiveness of the proposed algorithm.

  9. System studies in PA: Development of process influence diagram (PID) for SFR-1 repository near-field + far-field

    Energy Technology Data Exchange (ETDEWEB)

    Stenhouse, M.J. [Monitor Scientific, LLC, Denver, CO (United States); Miller, W.M.; Chapman, N.A. [QuantiSci Ltd., Melton Mowbray (United Kingdom)

    2001-05-01

    Scenario development is a key component of the performance assessment (PA) process for radioactive waste disposal, the primary objective being to ensure that all relevant factors associated with the future evolution of the repository system are properly considered in PA. As part of scenario development, a list of features, events and processes (FEPs) are identified and assembled, representing the Process System, with interactions/influences between FEPs incorporated in a Process Influence Diagram (PID). This report documents the technical work conducted between 1997 and the end of 1999 under the Systems Studies Project. The overall objective of this project has been the construction of a PID for the SFR-1 repository (final repository for reactor waste), this PID being the first stage in the identification of scenarios to describe future evolution of this repository. The PIDs discussed in this report have been created using two software applications: existing commercial software (Business Modeller, Infotool AB. Stockholm, Sweden) and, more recently, a newly developed software tool SPARTA (Enviros QuantiSci, Henley, U.K.). Although the focus of this report is on the application of SPARTA to PID development, it is important to document the work carried out prior to SPARTA being available, in order to provide a complete record of the entire SFR-1 PID development effort as well as preserving the context of the multi-year project. Following a description of the different disposal sections of the SFR-1 and the various near-field barriers, the sequential development (i.e. near-field of Silo, BMA, BLA, BTF sections; far-field; integrated near-field + far-field) of the PID for SFR-1 repository system using Business Modeller is described. Owing to the complexity of the repository, in terms of number of both different disposal sections (Silo, BLA, BMA, BTF) and barriers associated with each section, the two-dimensional (2D) PID created for SFR-1 using Business Modeller is

  10. Approach to tune near- and far-field properties of hybrid dimer nanoantennas via laser melting at the nanoscale

    CERN Document Server

    Sun, Yali; Zuev, Dmitry; Huang, Lirong; Krasnok, Alexander; Belov, Pavel

    2016-01-01

    Asymmetric metal-dielectric nanostructures are demonstrated superior optical properties arise from the combination of strong enhancement of their near fields and controllable scattering characteristics which originate from plasmonic and high-index dielectric components. Here, being inspired by the recent experimental work [Dmitry~Zuev, \\textit{et al.}, Adv. Mater. \\textbf{28}, 3087 (2016)] on a new technique for fabrication of asymmetric hybrid nanoparticles via femtosecond laser melting at the nanoscale, we suggest and study numerically a novel type of hybrid dimer nanoantennas. The nanoantennas consist of asymmetric metal-dielectric (Au/Si) nanoparticles and can allow tuning of the near- and far-field properties via laser melting of the metal part. We demonstrate a modification of scattering properties, near electric field distribution, normalized local density of states, and power patters of radiation of the nanoantennas upon laser reshaping. The parameters used to investigate these effects correspond to e...

  11. Near-field and far-field effects of elastic structure on coseismic deformation of the 2011 Tohoku earthquake, Japan

    Science.gov (United States)

    Hashima, Akinori; Becker, Thorsten; Freed, Andy; Sato, Hiroshi; Okaya, David; Suito, Hisashi; Yarai, Hiroshi; Ishiyama, Tatsuya; Iwasaki, Takaya

    2016-04-01

    Coseismic deformation due to the 2011 Tohoku earthquake, Japan, was detected by dense GPS network of over 1200 stations and several seafloor stations. Using these observations, we investigated effects of elastic structure on coseismic deformation with a 3-D finite element model incorporating geometry of the regional plate boundaries and elastic structures. First, we computed displacement fields for different elastic models with the same coseismic slip distribution to understand the effect of elastic structures. We assumed the three structure models: (a) Homogeneous model, (b) two-layered model considering crust-mantle structure (rigidity of 35 and 65 GPa, respectively) (Layered model), (c) crust-mantle model with cold subducting slab (85 GPa) (Slab model). We found the two contradicting effects: (1) In the far field (mostly at onshore stations), the amount of displacement decreases with the increase of the average rigidity. (2) In the near field at offshore stations, the amount of surface displacement increases with the increase of rigidity across the faults. This is because the stiffer (less deformable) footwall requires more movement of the hanging wall to accommodate the slip. Next, we inverted the observed displacements to obtain slip distribution for three elastic structures. The patterns of inverted slip distribution are basically similar for all three models but the amount of maximum slip is not simply related to average rigidity of structure models. The maximum slip increases from 39 m in Homogeneous model to 40 m in Layered model and then falls to 38 m in Slab model. These changes show that crust-mantle layering is more effective on far field while slab effect is more important in the near field.

  12. From earthquake size to far-field tsunami amplitude: development of a simple formula and application to DART buoy data

    Science.gov (United States)

    Okal, Emile A.; Reymond, Dominique; Hébert, Hélène

    2014-01-01

    We derive a simple formula relating tsunami amplitude in the far field to seismic moment, distance and azimuth from propagating rupture. Our formula is obtained from a comparison of a set of 4650 Pacific-wide simulations, computed for a series of sources spread over 10 subduction zones and four order of magnitudes in seismic moments. Our simulations are run both for a real grid reproducing the true bathymetry of the Pacific Basin and for an idealized one featuring a constant depth of 4000 m and no shorelines. This enables us to study and model separately the influence on the final amplitude of a tsunami wave of effects such as directivity and irregular bathymetry. The contribution of source size directivity and propagation over the sphere are studied using the constant-depth simulations. The influence of distance does not require any dispersive term and is properly modelled by geometrical spreading on the sphere. The directivity term, described classically in the frequency domain by Ben-Menahem & Rosenman can be approximated in the time domain by a moment-dependent linear regression as a function of azimuth. Finally, and after an allowance is made for the effect of receiver bathymetry using Green's law, the effect of irregular bathymetry is found to be generally defocusing, and can be modelled as a linear regression with distance. Once an estimate of the seismic moment of the parent earthquake is known, and under the assumption of a subduction mechanism along a fault of known azimuth, the resulting formula allows to forecast far-field tsunami amplitudes on the high seas. We use a data set of 116 tsunami amplitudes recorded at 51 past and present DART buoys following 21 tsunamigenic events to compare the estimates predicted by our algorithm to the amplitudes actually recorded. The average values of the residuals are 0.00 ± 0.25 logarithmic units, and 0.02 ± 0.20 at distances greater than 20°. An important aspect of our algorithm is that it correctly predicts the

  13. Appendix Cancer

    Science.gov (United States)

    ... are here Home > Types of Cancer > Appendix Cancer Appendix Cancer This is Cancer.Net’s Guide to Appendix Cancer. Use the menu below to choose the ... social workers, and patient advocates. Cancer.Net Guide Appendix Cancer Introduction Statistics Risk Factors Symptoms and Signs ...

  14. An Analysis of Mechanical Constraints when Using Superconducting Gravimeters for Far-Field Pre-Seismic Anomaly Detection

    Directory of Open Access Journals (Sweden)

    Shyh-Chin Lan

    2011-01-01

    Full Text Available Pre-seismic gravity anomalies from records obtained at a 1 Hz sampling rate from superconducting gravimeters (SG around East Asia are analyzed. A comparison of gravity anomalies to the source parameters of associated earthquakes shows that the detection of pre-seismic gravity anomalies is constrained by several mechanical conditions of the seismic fault plane. The constraints of the far-field pre-seismic gravity amplitude perturbation were examined and the critical spatial relationship between the SG station and the epicenter precursory signal for detection was determined. The results show that: (1 the pre-seismic amplitude perturbation of gravity is inversely proportional to distance; (2 the transfer path from the epicenter to the SG station that crosses a tectonic boundary has a relatively low pre-seismic gravity anomaly amplitude; (3 the pre-seismic gravity perturbation amplitude is also affected by the attitude between the location of an SG station and the strike of the ruptured fault plane. The removal of typhoon effects and the selection of SG stations within a certain intersection angle to the strike of the fault plane are essential for obtaining reliable pre-seismic gravity anomaly results.

  15. Seismic fragility analysis of typical pre-1990 bridges due to near- and far-field ground motions

    Science.gov (United States)

    Mosleh, Araliya; Razzaghi, Mehran S.; Jara, José; Varum, Humberto

    2016-03-01

    Bridge damages during the past earthquakes caused several physical and economic impacts to transportation systems. Many of the existing bridges in earthquake prone areas are pre-1990 bridges and were designed with out of date regulation codes. The occurrences of strong motions in different parts of the world show every year the vulnerability of these structures. Nonlinear dynamic time history analyses were conducted to assess the seismic vulnerability of typical pre-1990 bridges. A family of existing concrete bridge representative of the most common bridges in the highway system in Iran is studied. The seismic demand consists in a set of far-field and near-field strong motions to evaluate the likelihood of exceeding the seismic capacity of the mentioned bridges. The peak ground accelerations (PGAs) were scaled and applied incrementally to the 3D models to evaluate the seismic performance of the bridges. The superstructure was assumed to remain elastic and the nonlinear behavior in piers was modeled by assigning plastic hinges in columns. In this study the displacement ductility and the PGA are selected as a seismic performance indicator and intensity measure, respectively. The results show that pre-1990 bridges subjected to near-fault ground motions reach minor and moderate damage states.

  16. Far-field diffraction and focal plane misalignment effects on simulated GIFTS data from the IHOP field program

    Science.gov (United States)

    Olson, Erik R.; Knuteson, Robert O.; Revercomb, Hank E.; Li, Jun; Huang, Hung-Lung A.

    2004-10-01

    The Geosynchronous Imaging Fourier Transform Spectrometer (GIFTS) and the Hyperspectral Environmental Suite (HES) instruments are geostationary infrared spectrometers. Geostationary orbit provides observations with very good time resolution, but also increases the effect of diffraction. There can be significant differences in emitted radiances due to clouds and changes in surface characteristics. High, thick clouds in particular are much cooler than clear areas. Diffraction causes radiation that originates from cloudy areas outside of the detector field of view to contaminate the clear pixels. GIFTS will also have two detector arrays on different focal planes, which may not be perfectly aligned. This can cause spatial misalignment between the data for the two spectral regions. High spatial resolution numerical models run at the University of Wisconsin - Cooperative Institute for Meteorological Satellite Studies (UW-CIMSS) provide data for examining the diffraction and misalignment effects. The model data represents a variable cloud case during the IHOP field experiment at 1.3-km resolution. This paper outlines the production of high spatial resolution simulated data, characterization of the far field diffraction effects on radiances, and analysis of misalignment effects on temperature and moisture profile retrievals.

  17. Functional imaging of a single cell: far-field infrared super-resolution microscopy using autofluorescence detection

    Science.gov (United States)

    Ohmori, Tsutomu; Inoue, Keiichi; Sakai, Makoto; Fujii, Masaaki; Ishihara, Miya; Kikuchi, Makoto

    2009-02-01

    We demonstrated cell imaging without any stain by far-field 2-color infrared (IR) super-resolution microscopy, combining laser fluorescence microscope and picosecond transient fluorescence detected IR (TFD-IR) spectroscopy. TFD-IR spectroscopy detects IR absorption by monitoring fluorescence due to an electronic transition from a vibrational excited level by an additional visible light. By using the IR microscopy based on TFD-IR spectroscopy, the spatial resolution of the image can be increased to the visible diffraction limit of sub-μm, i.e., the IR is super-resolved. Cell auto-fluorescence due to flavin molecules was monitored for label-free detection of the cellular components. The fluorescence image of an A549 cell was obtained by introducing both an IR light at 3300 nm and a visible light at 560 nm. The spatial resolution of the image was estimated to be 1.6 μm. This is about 2.5-times higher resolution than the diffraction limit of IR light. The fluorescence intensity of the images at 3448 nm was smaller than that at 3300 nm, corresponding to the smaller IR absorption. Therefore, IR spectral imaging of a single cell was achieved with superresolution.

  18. Far-field model of the regional influence of affluent plumes from Ocean Thermal Energy Conversion (OTEC) plants

    Science.gov (United States)

    Wang, D. P.

    1985-07-01

    Ocean thermal energy conversion (OTEC) plants discharge large volumes of cold water into the upper ocean. A three-dimensional, limited-area model was developed to investigate the regional influence of the far-field effluent plume created by the negatively buoyant discharge. The model was applied to discharges from a 40-MW sub e OTEC plant into coastal waters characterized by various ambient ocean conditions. A typical ambient temperature structure and nutrient distribution, as well as the behavior of the effluent plume itself, were strongly modified by the discharge-induced circulation. Although temperature perturbations in the plume were small, upward entrainment of nutrients from below the thermocline was significant. The regional influence of discharges from an 80-MW sub e OTEC plant, the interactions between the discharges from two adjacent 40-MW sub e OTEC plants, and the effects of coastal boundary and bottom discharge were examined with respect to the regional influence of a 40-MW sub e OTEC plant located in deep water off a coast (base case).

  19. Theoretical and numerical studies of crack initiation and propagation in rock masses under freezing pressure and far-field stress

    Directory of Open Access Journals (Sweden)

    Yongshui Kang

    2014-10-01

    Full Text Available Water-bearing rocks exposed to freezing temperature can be subjected to freeze–thaw cycles leading to crack initiation and propagation, which are the main causes of frost damage to rocks. Based on the Griffith theory of brittle fracture mechanics, the crack initiation criterion, propagation direction, and crack length under freezing pressure and far-field stress are analyzed. Furthermore, a calculation method is proposed for the stress intensity factor (SIF of the crack tip under non-uniformly distributed freezing pressure. The formulae for the crack/fracture propagation direction and length of the wing crack under freezing pressure are obtained, and the mechanism for coalescence of adjacent cracks is investigated. In addition, the necessary conditions for different coalescence modes of cracks are studied. Using the topology theory, a new algorithm for frost crack propagation is proposed, which has the capability to define the crack growth path and identify and update the cracked elements. A model that incorporates multiple cracks is built by ANSYS and then imported into FLAC3D. The SIFs are then calculated using a FISH procedure, and the growth path of the freezing cracks after several calculation steps is demonstrated using the new algorithm. The proposed method can be applied to rocks containing fillings such as detritus and slurry.

  20. Oklo as a natural analogue. Reconstruction of ancient fluid circulations using trace-element geochemistry from near to far field

    International Nuclear Information System (INIS)

    The natural nuclear reactors located in the Oklo uranium ore deposit (Gabon) represent one of the best analogy of what could be the interaction of a site of radioactive wastes storage with geological medium. It is under this view of natural analogue that reaction zones and uranium ore deposit are studied in part of european program coordinated by C.E.A. The aim of the thesis is to characterize the ancient fluid circulation which have induced some elementary redistributions from near field to far field. Tracing fluid phase geochemistry have been made by study of several mineral populations (apatite, zircon, pyrite chalcopyrite). Fluids escaping from reaction zones during their critically have been identified by isotopic and elementary compositions of apatites located in 'argiles de pile'. Geochemical feature of those fluids have not been founded in the bearing sandstones. Although, mineralogical observations, chemical analysis on whole rocks and analysis of trace elements of zircons and apatites allowed to characterize an early hydrothermal stage which predates criticality in reaction zones. At the scale of uranium ore deposit, study of sulfur allowed to identify several hydrothermal stages. All those stages are later with respect to criticality in reaction zones. The principal fluid circulation stage, present both in pyrites and galena is interpreted as a resulting from mixing between a locally induced fluid and a regional circulation. A second stage is certainly later and correspond to a reworking of lead in galena and precipitation of pyrites and chalcopyrites. (author)

  1. Characteristic of HgCdTe photoconductive detector in energy distribution measurement system of laser spot in far field

    Science.gov (United States)

    Zhang, Jianmin; Feng, Guobin; Zhao, Jun

    2008-02-01

    Detector is an important device for the far-field laser spot measuring apparatus in form of photoelectrical detector array, for it acts as an optical-to-electrical converter in measure. Two working parameters of n-type HgCdTe photoconductor are discussed in this paper. The fundamental electrical properties of n-type Hg 1-xCd xTe material are summarized and related to device performance parameters. It can be found that the dark resistance R d and the voltage responsivity R v are closely bound up with temperature T and the alloy composition x, and the normalized calculating R d-T and R v-T characteristic curves are in good agreement with experimental results at temperature below 20°C. And then the dynamic responses of a detector under laser irradiation are studied by utilizing 2-D transient heat transfer model and empirical formulas. Furthermore, experimental investigation on laser damage in PC-type HgCdTe devices is operated by a means named 1on1. Detectable change in performance parameters has not been found under the irradiation of in-band laser, at power density beyond the detector linear response zone, and time of 200s. When the power of irradiation strengthened, the dark resistance increased, and the responsivity reduced. By observing the surface morphology of HgCdTe wafers, calculating the compositions x from R d-T characteristic, the causes for performance changing has been analyzed.

  2. Simulation of near-field and far-field optical properties of electromagnetically coupled multi-layered nanoparticles

    Science.gov (United States)

    Xu, Hongxing; Käll, Mikael

    2001-03-01

    Recent studies of nanoparticle-oligonucleotide conjugates^1 and “hot sites” in single-molecule surface-enhanced Raman scattering (SERS)^2 have highlighted the importance of clustering effects for the optical properties of metal nanoparticles. However, many applications in the life-sciences require coated nanoparticles, e.g. in order to induce biocompatibility or biorecognition. Such a coating will change the optical properties of the nanoparticle system. We here describe a calculational procedure that can be used to model the optical response of clusters composed of shelled spherical nanoparticles. Both far-field (e.g. extinction cross section) and near-field (e.g. SERS effect) optical properties can be evaluated. We will discuss how the wavelength dependent optical properties are influenced by core nanoparticle size and composition; surrounding medium; shell thickness and dielectric constant, and interparticle separation distance. ^1R. Elghanian et al., Science, 277, 1078 (1997); ^2H. Xu et al., Phys. Rev. Lett., 83, 4357 (1999) and Phys. Rev. E, 62, 4318 (2000)

  3. Simulations of near-field and far-field optical properties of electromagnetically coupled multi-layered nanoparticles

    Science.gov (United States)

    Xu, Hongxing

    2004-03-01

    Recent studies of nanoparticle-oligonucleotide conjugates[1] and "hot sites" in single-molecule surface-enhanced Raman scattering(SERS)[2] have highlighted the importance of clustering effects for the optical properties of metal nanoparticles. However, many applications in the life-sciences require coated nanoparticles, e.g. in order to induce biocompatibility or biorecognition. Such a coating will change the optical properties of nanoparticle system. We here describe a recursive method based on the extended Mie theory, which can be used to model the optical response clusters of shelled spherical nanoparticles. Both far-field (e.g. extinction cross section) and near-field (e.g. SERS effect) optical properties can be evaluated. We will discuss how the wavelength dependent optical properties are influenced by core nanoparticle size and composition; surrounding medium; shell thickness and dielectric constant, and interparticle separation distance. [1]R. Elghanian et al., Science, 277, 1078(1997); [2]H. Xu et al., Phys. Rev. Lett., 83, 4357(1999) and Phys. Rev. E, 62, 4318(2000)

  4. Full aperture backscatter station imager (FABSI) diagnostics system for far-field imaging of laser plasma instabilities on Nova

    International Nuclear Information System (INIS)

    In ICF, the understanding of laser plasma scattering processes is essential for laser target coupling and in controlling the symmetry of indirect drive implosions. The existing Nova Full Aperture Backscatter Station (FABS) has been useful in understanding laser plasma instabilities occurring in hohlraums by measuring the quantity, spectral distribution and near-field spatial distributions of Brillouin and more recently Raman backscatter. Equally important is an understanding of the farfield spatial intensity distribution which provides information on density, temperature and velocity gradient distributions, and which affect capsule implosion symmetry in hohlraums. Such information could potentially help in understanding processes such as filamentation and saturation mechanism. This paper describes a broad-band, color-corrected far-field imager and associated diagnostics capable of imaging the source of scattered light to better than 25 microm resolution. The imager can either image Brillouin or Raman backscatter through the Nova beam 7 focusing lens or be used like a microscope to image side scatter from other beams

  5. Tsunami risk assessment in the Marquesas Islands (French Polynesia) through numerical modeling of generic far-field events

    Science.gov (United States)

    Hébert, H.; Schindelé, F.; Heinrich, P.

    Earthquakes occurring at the Pacific Rim can trigger tsunamis that propagate across the ocean and can produce significant damages far away from the source. In French Polynesia, the Marquesas Islands are the most exposed to the far-field tsunami hazards, since they are not protected by any outer coral reef and since submarine slopes are less steep than in other islands. Between 1994 and 1996, four tsunamis have reached the bays of the archipelago, among them, the tsunami initiated by the Chilean Mw 8.1 earthquake, produced up to 3 m high waves in Tahauku Bay. Numerical modeling of these recent events has already allowed us to validate our method of resolution of hydrodynamics laws through a finite-difference scheme that simulates the propagation of the tsunamis across the ocean and computes the inundation heights (run-up) in remote bays. We present in this paper the simulations carried out to study potentially threatening areas located at the Pacific Rim, on the seismogenic Aleutian and Tonga subduction zones. We use a constant seismic moment source (that of the Mw 8.1 Chile 1995 earthquake, M0 = 1.2 1021 N.m) located at several potential epicenters, with the fault strike adapted from the regional seismotectonics pattern. Our results show that the sources chosen in the Aleutian trench do not produce large inundations in the Marquesas bays, except for the easternmost source (longitude 194° E). Sources located in the Tonga trench do not produce high amplifications either, except for the northernmost one (latitude 16° S). We also discuss the behaviour of the tsunami waves within the archipelago, and evidence contrasting responses depending on the arrival azimuths. These results show that, for a given initial seismic energy, the tsunami amplification in remote bays is highly dependent on the source location and fault strike.

  6. Numerical analysis on the signal characteristics for scattered far fields of ultrasonic SH-wave by the internal cavity of material

    International Nuclear Information System (INIS)

    In this paper, the SH-wave scattering by the internal cavity using Boundary Element Method is studied. The effects of defect shape on transmitted and reflected fields are considered. The effects of distance between internal cavity and internal point in infinite domain are also investigated. Numerical calculations by the BEM have been carried out to predict the near field and far field solutions of scattered fields of ultrasonic SH-wave. These far field solutions of frequency domain have been transformed into the waveforms of time domain using inverse fast fourier transform. The presented results can be used to improve the detection sensitivity and pursue quantitative nondestructive evaluation for inverse problem.

  7. Far-field coseismic displacements associated with the great Sumatra earthquakes of December 26, 2004 and March 29, 2005 constrained by Global Positioning System

    Institute of Scientific and Technical Information of China (English)

    WANG Min; ZHANG Peizhen; SHEN Zhengkang; LIU Jie; SUN Hanrong; GAN Weijun; LI Peng

    2006-01-01

    Based on continuous GPS observations within China as well as global GPS tracking network,a calculation has been made of far-field coseismic displacements associated with the December, 2004 (Mw= 9.3) and March, 2005 (Mw= 8.7) earthquakes.The far-field coseismic displacements are associated with the 2004 shock range more than 6000-7000 krn in both north-south and east-west dimensions,and depict an undulated wave pattern of contraction and extension. The coseismic displacements associated with the 2005 event, however, are distributed near the epicentral region, and the event itself may be an aftershock of the 2004 earthquake.

  8. J-85 jet engine noise measured in the ONERA S1 wind tunnel and extrapolated to far field

    Science.gov (United States)

    Soderman, Paul T.; Julienne, Alain; Atencio, Adolph, Jr.

    1991-01-01

    Noise from a J-85 turbojet with a conical, convergent nozzle was measured in simulated flight in the ONERA S1 Wind Tunnel. Data are presented for several flight speeds up to 130 m/sec and for radiation angles of 40 to 160 degrees relative to the upstream direction. The jet was operated with subsonic and sonic exhaust speeds. A moving microphone on a 2 m sideline was used to survey the radiated sound field in the acoustically treated, closed test section. The data were extrapolated to a 122 m sideline by means of a multiple-sideline source-location method, which was used to identify the acoustic source regions, directivity patterns, and near field effects. The source-location method is described along with its advantages and disadvantages. Results indicate that the effects of simulated flight on J-85 noise are significant. At the maximum forward speed of 130 m/sec, the peak overall sound levels in the aft quadrant were attentuated approximately 10 dB relative to sound levels of the engine operated statically. As expected, the simulated flight and static data tended to merge in the forward quadrant as the radiation angle approached 40 degrees. There is evidence that internal engine or shock noise was important in the forward quadrant. The data are compared with published predictions for flight effects on pure jet noise and internal engine noise. A new empirical prediction is presented that relates the variation of internally generated engine noise or broadband shock noise to forward speed. Measured near field noise extrapolated to far field agrees reasonably well with data from similar engines tested statically outdoors, in flyover, in a wind tunnel, and on the Bertin Aerotrain. Anomalies in the results for the forward quadrant and for angles above 140 degrees are discussed. The multiple-sideline method proved to be cumbersome in this application, and it did not resolve all of the uncertainties associated with measurements of jet noise close to the jet. The

  9. A review of sorption of radionuclides under the near- and far-field conditions of an underground radioactive waste repository. Pt. 3

    International Nuclear Information System (INIS)

    This report summarises work funded by the Department of the Environment and UK Nirex Ltd in the area of sorption of radionuclides under the near-field and far-field conditions pertaining to the underground disposal of radioactive waste in the UK that was presented and discussed in Part I. The report also summarises comparable research undertaken overseas (presented in Part II). (author)

  10. A comparison of far-field properties of radial noncanonical vortex airy beam arrays and radial noncanonical vortex Gaussian beam arrays

    Science.gov (United States)

    Cheng, Ke; Jiao, Liyang; Zhong, Xianqiong

    2016-05-01

    Based on the vector angular spectrum representation and stationary phase method, the analytical far-field vectorial expressions of radial noncanonical vortex Airy beam arrays (NVAiBAs) and radial noncanonical vortex Gaussian beam arrays (NVGBAs) are derived, and used to investigate their far-field vectorial properties, e.g. center optical vortices and energy fluxes of these corresponding beams, where the effect of noncanonical strength, topological charge, initial phase index and the number of beamlet on far-field vectorial properties of these corresponding beams is emphasized, respectively. The results show that the topological charge of center optical vortices in the far field is equal to initial phase index for the case of the radial NVAiBAs, whereas for radial NVGBAs the topological charge not only lies on initial phase index, but also is closely related to the odevity and sign of optical vortices embedded in beamlet, where mathematical analysis is made to explain the topological charge of center optical vortices, and the limitation of the number of beamlet to the topological charge of center optical vortices is also discussed. In addition, energy fluxes of radial NVAiBAs and NVGBAs exhibit different space orientations by controlling noncancial strength and present larger dark zones by increasing topological charge of beamlet, respectively. Finally, the relationship between the center optical vortices and energy fluxes of radial NVAiBAs and NVGBAs in even or odd N beamlets is also revealed, respectively.

  11. A Line Integral Representation of the Physical Optics Far Field from Plane PEC Scatterers Illuminated by Electric or Magnetic Hertzian Dipoles

    DEFF Research Database (Denmark)

    Arslanagic, S.; Meincke, Peter; Jørgensen, E.;

    2002-01-01

    We derive a line integral representation of the physical optics (PO) scattered far field that yields the exact same result as the conventional surface radiation integral. This representation applies to a perfectly electrically conducting plane scatterer illuminated by electric or magnetic Hertzian...... dipoles....

  12. Appendix (image)

    Science.gov (United States)

    The appendix is near the junction of the small bowel and the colon. On occasion, it may become infected. ... It is treated by surgical removal of the appendix (appendectomy). Recovery time for uncomplicated appendicitis is usually ...

  13. Source estimate and tsunami forecast from far-field deep-ocean tsunami waveforms—The 27 February 2010 Mw 8.8 Maule earthquake

    Science.gov (United States)

    Yoshimoto, Masahiro; Watada, Shingo; Fujii, Yushiro; Satake, Kenji

    2016-01-01

    We inverted the 2010 Maule earthquake tsunami waveforms recorded at DART (Deep-ocean Assessment and Reporting Tsunamis) stations in the Pacific Ocean by taking into account the effects of the seawater compressibility, elasticity of the solid Earth, and gravitational potential change. These effects slow down the tsunami speed and consequently move the slip offshore or updip direction, consistent with the slip distribution obtained by a joint inversion of DART, tide gauge, GPS, and coastal geodetic data. Separate inversions of only near-field DART data and only far-field DART data produce similar slip distributions. The former demonstrates that accurate tsunami arrival times and waveforms of trans-Pacific tsunamis can be forecast in real time. The latter indicates that if the tsunami source area is as large as the 2010 Maule earthquake, the tsunami source can be accurately estimated from the far-field deep-ocean tsunami records without near-field data.

  14. A review of the role of colloids in the release and transport of radionuclides in the near and far field. Pt. 3

    International Nuclear Information System (INIS)

    The role of colloids in the release and transport of radionuclides in the near and far field is discussed and DOE and Nirex funded work is compared with relevant studies by other workers. Gaps in the DOE and Nirex programmes are identified and suggestions for further research are made. This is Part 3 of a three-part review. Part 1 reviews fundamental theory and DOE and Nirex funded work and Part 2 is a comprehensive bibliography (with abstracts). (Author)

  15. Analysis of the Far-Field Co-seismic and Post-seismic Responses Caused by the 2011 M W 9.0 Tohoku-Oki Earthquake

    Science.gov (United States)

    Shao, Zhigang; Zhan, Wei; Zhang, Langping; Xu, Jing

    2016-02-01

    We analyzed the far-field co-seismic response of the M W 9.0 Tohoku-Oki earthquake, which occurred on March 11th 2011 at the Japan Trench plate boundary. Our analysis indicates that the far-field co-seismic displacement was very sensitive to the magnitude of this event, and that a significant co-seismic surface displacement from earthquakes in the Japan Trench region can be observed in Eurasia only for events of M W ≥ 8.0. We also analyzed the temporal characteristics of the near-field post-seismic deformation caused by the afterslip and the viscoelastic relaxation following the Japan earthquake. Next, we performed a simulation to analyze the influence of the two post-seismic effects previously mentioned on the far-field post-seismic crustal deformation. The simulation results help explain the post-seismic crustal deformation observed on the Chinese mainland 1.5 years after the event. Fitting results revealed that after the M W 9.0 Tohoku-Oki earthquake, the afterslip decayed exponentially, and may eventually disappear after 4 years. The far-field post-seismic displacement in Eurasia caused by the viscoelastic relaxation following this earthquake will reach the same magnitude as the co-seismic displacement in approximately 10 years. In addition, the co- and post-seismic Coulomb stress on several NE-trending faults in the northeastern and northern regions of the Chinese mainland were significantly enhanced because of the M W 9.0 earthquake, especially on the Yilan-Yitong and the Dunhua-Mishan faults (the northern section of the Tan-Lu fault zone) as well as the Yalujiang and the Fuyu-Zhaodong faults.

  16. The stratigraphic imprint of a mid-Telychian (Llandovery, Early Silurian glaciation on far-field shallow-water carbonates, Anticosti Island, Eastern Canada

    Directory of Open Access Journals (Sweden)

    François Clayer

    2014-12-01

    Full Text Available The near-field stratigraphic record of the Early Silurian glaciations is well documented in the literature. Data from far-field areas are, however, sparse. One of the best far-field stratigraphic records of these Llandovery glaciations is exposed on Anticosti Island in eastern Canada. Eight shallow-water paleotropical facies are present close to the mid-Telychian Jupiter–Chicotte formational boundary along the south-central coast of Anticosti Island. These can be grouped into three facies associations that include, from bottom to top: a carbonate facies association (FA-1, a mixed siliciclastic and carbonate facies association (FA-2 and an encrinitic facies association (FA-3. These mid- to outer-ramp strata represent deposition mostly from episodic, high-energy storm events as evidenced by their sharp bases, hummocky cross-stratification, large wave ripples, gutter casts and wave-enhanced sediment gravity flow deposits. Superimposed on a long-term regressive trend, one main transgressive–regressive (TR sequence and four meter-scale TR cycles are evident, indicating a multi-order stratigraphic framework developed under the influence of glacio-eustasy. The Jupiter–Chicotte formational boundary, a regional discontinuity surface caused by a forced regression, corresponds to the onset of a far-field mid-Telychian glaciation.

  17. On the Seismic Response of Protected and Unprotected Middle-Rise Steel Frames in Far-Field and Near-Field Areas

    Directory of Open Access Journals (Sweden)

    Dora Foti

    2014-01-01

    Full Text Available Several steel moment-resisting framed buildings were seriously damaged during Northridge (1994; Kobe (1995; Kocaeli, Turkey (1999, earthquakes. Indeed, for all these cases, the earthquake source was located under the urban area and most victims were in near-field areas. In fact near-field ground motions show velocity and displacement peaks higher than far-field ones. Therefore, the importance of considering near-field ground motion effects in the seismic design of structures is clear. This study analyzes the seismic response of five-story steel moment-resisting frames subjected to Loma Prieta (1989 earthquake—Gilroy (far-field register and Santa Cruz (near-field register. The design of the frames verifies all the resistance and stability Eurocodes’ requirements and the first mode has been determined from previous shaking-table tests. In the frames two diagonal braces are installed in different positions. Therefore, ten cases with different periods are considered. Also, friction dampers are installed in substitution of the braces. The behaviour of the braced models under the far-field and the near-field records is analysed. The responses of the aforementioned frames equipped with friction dampers and subjected to the same ground motions are discussed. The maximum response of the examined model structures with and without passive dampers is analysed in terms of damage indices, acceleration amplification, base shear, and interstory drifts.

  18. Simulations of far-field optical beam quality influenced by the thermal distortion of the secondary mirror for high-power laser system

    Science.gov (United States)

    Guo, Ruhai; Chen, Ning; Zhuang, Xinyu; Wang, Bing

    2015-02-01

    In order to research the influence on the beam quality due to thermal deformation of the secondary mirror in the high power laser system, the theoretical simulation study is performed. Firstly, three typical laser power 10kW, 50kW and 100kW with the wavelength 1.064μm are selected to analyze thermal deformation of mirror through the finite element analyze of thermodynamics instantaneous method. Then the wavefront aberration can be calculated by ray-tracing theory. Finally, focus spot radius,beam quality (BQ) of far-filed beam can be calculated and comparably analyzed by Fresnel diffraction integration. The simulation results show that with the increasing laser power, the optical aberration of beam director gets worse, the far-field optical beam quality decrease, which makes the laser focus spot broadening and the peak optical intensity of center decreasing dramatically. Comparing the clamping ring and the three-point clamping, the former is better than the latter because the former only induces the rotation symmetric deformation and the latter introduces additional astigmatism. The far-field optical beam quality can be improved partly by simply adjusting the distance between the main mirror and the secondary mirror. But the far-field power density is still the one tenth as that without the heat distortion of secondary mirror. These results can also provide the reference to the thermal aberration analyze for high power laser system and can be applied to the field of laser communication system and laser weapon etc.

  19. Measuring features of the fluence at the far field of CO2 pulsed laser: An issue study with suggestions on how to do it

    Science.gov (United States)

    Johnson, E. G., Jr.; Phelan, R. J., Jr.; Boyle, D. R.

    1980-04-01

    Measuring the energy density incident on targets where the energy is from a pulse of high energy at CO2 wavelengths and where the targets are located at the far field is discussed. The analysis considers a ground based target for testing and calibration of the measurement systems and a drone towed behind an airplane from which the energy distribution information is telemetered to the ground station. Each stage of the measurement system from the reception of the incident laser pulse on the drone to the pulse coded transmission of the sampled data to a ground based computer is described.

  20. Spectrally resolved and phase-sensitive far-field measurement for the coherent addition of laser pulses in a tiled grating compressor.

    Science.gov (United States)

    Hornung, Marco; Bödefeld, Ragnar; Kessler, Alexander; Hein, Joachim; Kaluza, Malte C

    2010-06-15

    We describe a method that can be used for the coherent addition of laser pulses. As different laser pulses are initially generated in a laser-pulse compressor equipped with a tiled grating, such a coherent addition is indispensable in order to maximize the intensity in the laser far field. We present measurements in this context where, up to now, an unavoidable difference in the grating constants between the phased gratings reduced the maximum achievable intensity. The method significantly facilitates the high-precision alignment of a tiled grating compressor and could also be used for a coherent addition of laser pulses. PMID:20548390

  1. Simultaneous measurement of patterns in the signal and idler near and far fields from a confocal optical parametrical oscillator with applications in quantum optics

    DEFF Research Database (Denmark)

    Lassen, Mikael Østergaard; Tidemand-Lichtenberg, Peter; Buchhave, Preben

    2005-01-01

    We present the results of an experimental investigation of multimode intensity patterns from an optical parametric oscillator operating above threshold and show that it oscillates in 10-15 transverse modes strongly coupled through the nonlinear crystal, which makes this setup useful for future...... investigation of quantum correlations in the transverse plane. We describe the experimental setup for simultaneous measurements of signal and idler near- and far-field patterns and analyze the effects of various experimental complications such as walk-off and thermal index changes on the generated patterns. We...... also show that the oscillator can be stabilized by optical feedback, indicating a possible route for controlling the generated intensity patterns....

  2. A review of sorption of radionuclides under the near- and far-field conditions of an underground radioactive waste repository. Pt. 2

    International Nuclear Information System (INIS)

    This report, a bibliography, has been prepared, presenting work carried out world-wide since 1970 on the sorption of radionuclides under near- and far-field conditions. Work has been included where the results are relevant to the disposal of low- and intermediate-level radioactive waste in a cementitious repository in the UK. The bibliography has been prepared using the INIS database and includes eight hundred references, listed both by subject and by country. In addition to these indexes, full abstracts are presented in reverse chronological order. A brief description of the relevance and measurement of sorption parameters is included. (author)

  3. Breakdown of doublet recirculation and direct line drives by far-field flow in reservoirs: implications for geothermal and hydrocarbon well placement

    Science.gov (United States)

    Weijermars, R.; van Harmelen, A.

    2016-07-01

    An important real world application of doublet flow occurs in well design of both geothermal and hydrocarbon reservoirs. A guiding principle for fluid management of injection and extraction wells is that mass balance is commonly assumed between the injected and produced fluid. Because the doublets are considered closed loops, the injection fluid is assumed to eventually reach the producer well and all the produced fluid ideally comes from stream tubes connected to the injector of the well pair making up the doublet. We show that when an aquifer background flow occurs, doublets will rarely retain closed loops of fluid recirculation. When the far-field flow rate increases relative to the doublet's strength, the area occupied by the doublet will diminish and eventually vanishes. Alternatively, rather than using a single injector (source) and single producer (sink), a linear array of multiple injectors separated by some distance from a parallel array of producers can be used in geothermal energy projects as well as in waterflooding of hydrocarbon reservoirs. Fluid flow in such an arrangement of parallel source-sink arrays is shown to be macroscopically equivalent to that of a line doublet. Again, any far-field flow that is strong enough will breach through the line doublet, which then splits into two vortices. Apart from fundamental insight into elementary flow dynamics, our new results provide practical clues that may contribute to improve the planning and design of doublets and direct line drives commonly used for flow management of groundwater, geothermal and hydrocarbon reservoirs.

  4. Static and wind tunnel near-field/far field jet noise measurements from model scale single-flow baseline and suppressor nozzles. Volume 2: Forward speed effects

    Science.gov (United States)

    Jaeck, C. L.

    1976-01-01

    A model scale flight effects test was conducted in the 40 by 80 foot wind tunnel to investigate the effect of aircraft forward speed on single flow jet noise characteristics. The models tested included a 15.24 cm baseline round convergent nozzle, a 20-lobe and annular nozzle with and without lined ejector shroud, and a 57-tube nozzle with a lined ejector shroud. Nozzle operating conditions covered jet velocities from 412 to 640 m/s at a total temperature of 844 K. Wind tunnel speeds were varied from near zero to 91.5 m/s. Measurements were analyzed to (1) determine apparent jet noise source location including effects of ambient velocity; (2) verify a technique for extrapolating near field jet noise measurements into the far field; (3) determine flight effects in the near and far field for baseline and suppressor nozzles; and (4) establish the wind tunnel as a means of accurately defining flight effects for model nozzles and full scale engines.

  5. Breakdown of doublet re-circulation and direct line drives by far-field flow in reservoirs: Implications for geothermal and hydrocarbon well placement

    Science.gov (United States)

    Weijermars, R.; van Harmelen, A.

    2016-04-01

    An important real world application of doublet flow occurs in well design of both geothermal and hydrocarbon reservoirs. A guiding principle for fluid management of injection and extraction wells is that mass balance is commonly assumed between the injected and produced fluid. Because the doublets are considered closed loops, the injection fluid is assumed to eventually reach the producer well and all the produced fluid ideally comes from stream tubes connected to the injector of the well pair making up the doublet. We show that when an aquifer background flow occurs, doublets will rarely retain closed loops of fluid re-circulation. When the far-field flow rate increases relative to the doublet's strength, the area occupied by the doublet will diminish and eventually vanishes. Alternatively, rather than using a single injector (source) and single producer (sink), a linear array of multiple injectors separated by some distance from a parallel array of producers can be used in geothermal energy projects as well as in waterflooding of hydrocarbon reservoirs. Fluid flow in such an arrangement of parallel source-sink arrays is shown to be macroscopically equivalent to that of a line doublet. Again, any far-field flow that is strong enough will breach through the line doublet, which then splits into two vortices. Apart from fundamental insight into elementary flow dynamics, our new results provide practical clues that may contribute to improve the planning and design of doublets and direct line drives commonly used for flow management of groundwater, geothermal and hydrocarbon reservoirs.

  6. Appendix section

    International Nuclear Information System (INIS)

    These appendixes present a paper on the interaction of X and gamma radiation with matter. Some examples of manual and several worksheets for maintenance from weekly to annually, a worksheet for radiometric survey and 2 articles are also presented

  7. Generation of isolated attosecond pulses in the far field by spatial filtering with an intense few-cycle mid-infrared laser

    International Nuclear Information System (INIS)

    We report theoretical calculations of high-order harmonic generation (HHG) of Xe with the inclusion of multielectron effects and macroscopic propagation of the fundamental and harmonic fields in an ionizing medium. By using the time-frequency analysis we show that the reshaping of the fundamental laser field is responsible for the continuum structure in the HHG spectra. We further suggest a method for obtaining an isolated attosecond pulse (IAP) by using a filter centered on axis to select the harmonics in the far field with different divergence. We also discuss the carrier-envelope-phase dependence of an IAP and the possibility to optimize the yield of the IAP. With intense few-cycle mid-infrared lasers, this offers a possible method for generating isolated attosecond pulses.

  8. Generation of isolated attosecond pulses in the far field by spatial filtering with an intense few-cycle mid-infrared laser

    CERN Document Server

    Jin, Cheng; Trallero-Herrero, Carlos A; Lin, C D

    2011-01-01

    We report theoretical calculations of high-order harmonic generation (HHG) of Xe with the inclusion of multi-electron effects and macroscopic propagation of the fundamental and harmonic fields in an ionizing medium. By using the time-frequency analysis we show that the reshaping of the fundamental laser field is responsible for the continuum structure in the HHG spectra. We further suggest a method for obtaining an isolated attosecond pulse (IAP) by using a filter centered on axis to select the harmonics in the far field with different divergence. We also discuss the carrier-envelope-phase dependence of an IAP and the possibility to optimize the yield of the IAP. With the intense few-cycle mid-infrared lasers, this offers a possible method for generating isolated attosecond pulses.

  9. Combining near-field hyperspectral imaging and far-field spectral-angular distribution to develop mid-field white LED optical models with spatial color deviation.

    Science.gov (United States)

    Lee, Tsung-Xian; Lu, Tsung-Lin; Chen, Bo-Song

    2016-07-11

    The integration of spatial distribution of light intensity and color in the midfield is instrumental for LED optical design. On the basis of this rationale, we proposed an accurate and convenient method for developing white LED optical models. Near-field hyperspectral images and far-field spectral-angular distributions were integrated to illustrate changes in spatial light intensity and color distribution in the mid-field, to the exclusion of the absorption, conversion, and scattering of phosphors. The corresponding optical models were developed for three LED samples under different packaging conditions. Their normalized cross-correlation values for spatial light intensity and correlated-color-temperature distribution between simulation and measurement averaged as high as 0.995 and 0.99 respectively, which validated the accuracy and feasibility of the proposed method. PMID:27410897

  10. A review of sorption of radionuclides under the near- and far-field conditions of an underground radioactive waste repository. Pt. 1

    International Nuclear Information System (INIS)

    This report presents and discusses work funded by the Department of the Environment and UK Nirex Ltd in the area of sorption of radionuclides under near-field and far-field conditions as related to the underground disposal of radioactive waste in the UK. It is intended as a basis for comparison with work undertaken world-wide in the sorption area, presented in Part II of this review. The UK and overseas work are compared in Part III. From lists of reports and papers supplied by DOE (HMIP) and Nirex, those publications believed to be relevant were selected and are listed here by subject. Summaries of all these reports are included in the form of abstracts, or where available, executive summaries. The work presented is further summarised and discussed. Sections on sorption and laboratory experimental methods are included, along with a section on the level of understanding and outstanding issues. (Author)

  11. Design of surface emitting distributed feedback quantum cascade laser with single-lobe far-field pattern and high outcoupling efficiency

    International Nuclear Information System (INIS)

    A 7.8-μm surface emitting second-order distributed feedback quantum cascade laser (DFB QCL) structure with metallized surface grating is studied. The modal property of this structure is described by utilizing coupled-mode theory where the coupling coefficients are derived from exact Floquet–Bloch solutions of infinite periodic structure. Based on this theory, the influence of waveguide structure and grating topography as well as device length on the laser performance is numerically investigated. The optimized surface emitting second-order DFB QCL structure design exhibits a high surface outcoupling efficiency of 22% and a low threshold gain of 10 cm−1. Using a π phase-shift in the centre of the grating, a high-quality single-lobe far-field radiation pattern is obtained. (classical areas of phenomenology)

  12. Symmetric far field, short-wavelength (λ = 4.53 μm) MOPA quantum cascade lasers with Watt-level optical output power

    International Nuclear Information System (INIS)

    Full text: We present the design and first realization of short-wavelength (λ = 4.53 μm), single mode emitting quantum cascade lasers in a master oscillator power amplifier configuration. Watt-level peak optical output power is demonstrated for typical non-tapered 4 μm wide and 5.25 mm long (DFB: 1.25 mm, FP: 4 mm) devices. Far field measurements prove a symmetric, single-transverse-mode emission in TM00-mode with typical divergences of 25° in and 27° perpendicular to the growth direction. We demonstrate single mode tuning over a range of 7.9 cm-1 for temperatures between 263 K and 313 K and also single mode emission for different driving currents and varied pulse-lengths between 25 ns and 100 ns. The side mode suppression ratio is measured to be higher than 20 dB. (author)

  13. Generation of isolated attosecond pulses in the far field by spatial filtering with an intense few-cycle mid-infrared laser

    Science.gov (United States)

    Jin, Cheng; Le, Anh-Thu; Trallero-Herrero, Carlos A.; Lin, C. D.

    2011-10-01

    We report theoretical calculations of high-order harmonic generation (HHG) of Xe with the inclusion of multielectron effects and macroscopic propagation of the fundamental and harmonic fields in an ionizing medium. By using the time-frequency analysis we show that the reshaping of the fundamental laser field is responsible for the continuum structure in the HHG spectra. We further suggest a method for obtaining an isolated attosecond pulse (IAP) by using a filter centered on axis to select the harmonics in the far field with different divergence. We also discuss the carrier-envelope-phase dependence of an IAP and the possibility to optimize the yield of the IAP. With intense few-cycle mid-infrared lasers, this offers a possible method for generating isolated attosecond pulses.

  14. Generation of isolated attosecond pulses in the far field by spatial filtering with an intense few-cycle mid-infrared laser

    Energy Technology Data Exchange (ETDEWEB)

    Jin Cheng; Le, Anh-Thu; Trallero-Herrero, Carlos A.; Lin, C. D. [J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, Kansas 66506-2604 (United States)

    2011-10-15

    We report theoretical calculations of high-order harmonic generation (HHG) of Xe with the inclusion of multielectron effects and macroscopic propagation of the fundamental and harmonic fields in an ionizing medium. By using the time-frequency analysis we show that the reshaping of the fundamental laser field is responsible for the continuum structure in the HHG spectra. We further suggest a method for obtaining an isolated attosecond pulse (IAP) by using a filter centered on axis to select the harmonics in the far field with different divergence. We also discuss the carrier-envelope-phase dependence of an IAP and the possibility to optimize the yield of the IAP. With intense few-cycle mid-infrared lasers, this offers a possible method for generating isolated attosecond pulses.

  15. Transient behavior of far-field diffraction patterns of a Gaussian laser beam due to the thermo-optical effect in metal nanocolloids

    International Nuclear Information System (INIS)

    We report on the experimental observation of the temporal dynamics of diffraction pattern formation when a low-power Gaussian laser beam passes through a cell with nanoparticles suspended in a liquid. As it turned out, the stable far-field picture on the screen is formed in the interval of a few seconds after laser radiation passage. These diffraction patterns consist of several coaxial bright and dark rings, whose diameter and number vary, depending on the type and concentration of the colloidal solution, as well as on the optical depth of the colloid and laser power. The observed behavior of the diffraction pattern dynamics are interpreted theoretically based on the Fresnel–Kirchhoff integral and the analytical solution of the heat transfer equation

  16. Transient behavior of far-field diffraction patterns of a Gaussian laser beam due to the thermo-optical effect in metal nanocolloids

    Science.gov (United States)

    Geints, Yuri E.; Panamarev, Nicolay S.; Zemlyanov, Aleksey A.

    2011-05-01

    We report on the experimental observation of the temporal dynamics of diffraction pattern formation when a low-power Gaussian laser beam passes through a cell with nanoparticles suspended in a liquid. As it turned out, the stable far-field picture on the screen is formed in the interval of a few seconds after laser radiation passage. These diffraction patterns consist of several coaxial bright and dark rings, whose diameter and number vary, depending on the type and concentration of the colloidal solution, as well as on the optical depth of the colloid and laser power. The observed behavior of the diffraction pattern dynamics are interpreted theoretically based on the Fresnel-Kirchhoff integral and the analytical solution of the heat transfer equation.

  17. Dynamic Interaction Behavior between Jumbo Container Crane and Pile-Supported Wharf under NearField and Far-Field Ground Motions

    Directory of Open Access Journals (Sweden)

    J. R. LI

    2016-02-01

    Full Text Available Playing an important role in local and national seaport activities, container wharves are susceptible to structural failure and damage during earthquake events. Therefore, factors that affect the seismic response of crane–wharf structures under different types of earthquake ground motions should be elucidated. In this paper, 3D finite element models were established to investigate the differences of natural vibration characteristics between the wharf and crane–wharf structures. The dynamic response of a typical pile-supported wharf structure and the interaction behavior of a crane and wharf structural system under seismic actions of near-field and far-field ground motions were studied by performing numerical simulation and time-history response analysis. Axial force–moment relation curves were adopted to analyze the elastic–plastic limit state of the wharf structure under different ground motions. Results showed that the consideration of the container crane increased the natural vibration period of the pile-supported wharf structure and affected the dynamic characteristics of the structure. Compared with the far-field earthquake ground motion, the nearfield earthquake exerted a more significant impact on the structural dynamic response that controlled the elastic–plastic limit state. With the presence of a crane, the moment and shear force of the pile-top decreased and the location of the extreme value moved down obviously. The findings demonstrated that considering the crane changed the failure mechanism of the wharf structure, and the eccentric effect of the crane may amplify the dynamic response as the peak ground acceleration increases. The results provide reference for the seismic design and the evaluation of the seismic response of container wharves.

  18. Far-Field Tsunami Impact in the North Atlantic Basin from Large Scale Flank Collapses of the Cumbre Vieja Volcano, La Palma

    Science.gov (United States)

    Tehranirad, Babak; Harris, Jeffrey C.; Grilli, Annette R.; Grilli, Stephan T.; Abadie, Stéphane; Kirby, James T.; Shi, Fengyan

    2015-12-01

    In their pioneering work, Ward and Day suggested that a large scale flank collapse of the Cumbre Vieja Volcano (CVV) on La Palma (Canary Islands) could trigger a mega-tsunami throughout the North Atlantic Ocean basin, causing major coastal impact in the far-field. While more recent studies indicate that near-field waves from such a collapse would be more moderate than originally predicted by Ward and Day [Løvholt et al. (J Geophy Res 113:C09026, 2008); Abadie et al. (J Geophy Res 117:C05030, 2012)], these would still be formidable and devastate the Canary Island, while causing major impact in the far-field at many locations along the western European, African, and the US east coasts. Abadie et al. (J Geophy Res 117:C05030, 2012) simulated tsunami generation and near-field tsunami impact from a few CVV subaerial slide scenarios, with volumes ranging from 20 to 450 km^3; the latter representing the most extreme scenario proposed by Ward and Day. They modeled tsunami generation, i.e., the tsunami source, using THETIS, a 3D Navier-Stokes (NS) multi-fluid VOF model, in which slide material was considered as a nearly inviscid heavy fluid. Near-field tsunami impact was then simulated for each source using FUNWAVE-TVD, a dispersive and fully nonlinear long wave Boussinesq model [ Shi et al. (Ocean Modell 43-44:36-51, 2012); Kirby et al. (Ocean Modeling, 62:39-55, 2013)]. Here, using FUNWAVE-TVD for a series of nested grids of increasingly fine resolution, we model and analyze far-field tsunami impact from two of Abadie et al.'s extreme CVV flank collapse scenarios: (i) that deemed the most "credible worst case scenario" based on a slope stability analysis, with a 80 km^3 volume; and (ii) the most extreme scenario, similar to Ward and Day's, with a 450 km^3 volume. Simulations are performed using a one-way coupling scheme in between two given levels of nested grids. Based on the simulation results, the overall tsunami impact is first assessed in terms of maximum surface

  19. Humic substances in performance assessment of nuclear waste disposal: Actinide and iodine migration in the far-field. Third technical progress report

    International Nuclear Information System (INIS)

    The present report describes progress within the third and final year of the EC-project 'Humic Substances in Performance Assessment of Nuclear Waste Disposal: Actinide and Iodine Migration in the Far-Field'. The work conducted within the present project builds on a number of previous activities/project supported by the Commission. It finds its continuation within different EC FP 6 instruments and also provides for additional continued cooperation through network structures resulting from the broad cooperation within the project. Without being a formal requirement of the Commission or co-funding bodies, this report documents results in great technical detail and makes the results available to a broad scientific community. The report contains an executive summary written by the coordinator. More detailed results are given as individual contributions in the form of 12 annexes. Not all results are discussed or referred to in the executive summary report and thus readers with a deeper interest also need to consult the annexes. The overall objectives were to generate knowledge about the impact of humic substances on the migration of actinides and iodine in the far-field of a nuclear waste repository. In the beginning, focus was rather on the potential enhancement due to humic colloid mediated radionuclide transport. Thereby, sources, inventory, stability and mobility of dissolved humic substances in their colloidal form formed a key topic. Other key topics were the interaction with actinides and iodine, transport studies under near-natural conditions in the laboratory, rationalization of knowledge in models and application to three migration cases for visualization of the overall outcome. Changes relative to the original objectives were given by moving emphasis of natural chemical analogue studies from the question of kinetic exchange constants for different inventories in natural and laboratory systems to the study of anthropogenic actinide contaminants in the Irish Sea

  20. Effects of near surface soil moisture profiles during evaporation on far-field ground-penetrating radar data: A numerical study

    KAUST Repository

    Moghadas, Davood

    2013-01-01

    We theoretically investigated the effect of vapor flow on the drying front that develops in soils when water evaporates from the soil surface and on GPR data. The results suggest the integration of the full-wave GPR model with a coupled water, vapor, and heat flow model to accurately estimate the soil hydraulic properties. We investigated the Effects of a drying front that emerges below an evaporating soil surface on the far-field ground-penetrating radar (GPR) data. First, we performed an analysis of the width of the drying front in soils with 12 different textures by using an analytical model. Then, we numerically simulated vertical soil moisture profiles that develop during evaporation for the soil textures. We performed the simulations using a Richards flow model that considers only liquid water flow and a model that considers coupled water, vapor, and heat flows. The GPR signals were then generated from the simulated soil water content profiles taking into account the frequency dependency of apparent electrical conductivity and dielectric permittivity. The analytical approach indicated that the width of the drying front at the end of Stage I of the evaporation was larger in silty soils than in other soil textures and smaller in sandy soils. We also demonstrated that the analytical estimate of the width of the drying front can be considered as a proxy for the impact that a drying front could have on far-field GPR data. The numerical simulations led to the conclusion that vapor transport in soil resulted in S-shaped soil moisture profiles, which clearly influenced the GPR data. As a result, vapor flow needs to be considered when GPR data are interpreted in a coupled inversion approach. Moreover, the impact of vapor flow on the GPR data was larger for silty than for sandy soils. These Effects on the GPR data provide promising perspectives regarding the use of radars for evaporation monitoring. © Soil Science Society of America 5585 Guilford Rd., Madison, WI

  1. Appendix C

    DEFF Research Database (Denmark)

    Christensen, F. A.; Henriksen, M. S.; Brincker, Rune

    1999-01-01

    In this appendix a model is formulated for the rotational capacity of reinforced concrete beams assuming rebar tension failure. The model is based on a classical approach and establishes the load-deflection curve of a reinforced concrete beam. The rotational capacity is then obtained as the area ...

  2. Appendix A

    DEFF Research Database (Denmark)

    Henriksen, M. S.; Brincker, Rune; Heshe, Gert

    In this appendix a brief summary of experiments on reinforced concrete beams in three-point bending performed at Aalborg University is given. The aim of the investigation is to determine the full load-deflection curves for different beam sizes, different types of concrete and different amounts and...

  3. Appendix B

    DEFF Research Database (Denmark)

    Christensen, F. A.; Brincker, Rune

    1999-01-01

    In this appendix the failure behaviour of lightly reinforced concrete beams is investigated. A numerical model based on the fictitious crack approach according to Hillerborg [1] is established in order to estimate the load-deflection curve for lightly reinforced concrete beams. The debonding betw...

  4. Far-Field Tunable Nano-focusing Based on Metallic Slits Surrounded with Nonlinear-Variant Widths and Linear-Variant Depths of Circular Dielectric Grating

    CERN Document Server

    Cao, Peng-Fei; Zhang, Xiao-Ping; Lu, Wei-Ping; Kong, Wei-Jie; Liang, Xue-Wu

    2013-01-01

    In this work, we design a new tunable nanofocusing lens by the linear-variant depths and nonlinear-variant widths of circular grating for far field practical applications. The constructively interference of cylindrical surface plasmon launched by the subwavelength metallic structure can form a subdiffraction-limited focus, and the focal length of the this structures can be adjusted if the each groove depth and width of circular grating are arranged in traced profile. According to the numerical calculation, the range of focusing points shift is much more than other plasmonic lens, and the relative phase of emitting light scattered by surface plasmon coupling circular grating can be modulated by the nonlinear-variant width and linear-variant depth. The simulation result indicates that the different relative phase of emitting light lead to variant focal length. We firstly show a unique phenomenon for the linear-variant depths and nonlinear-variant widths of circular grating that the positive change and negative ...

  5. FDTD analysis of temperature elevation in the lens of human and rabbit models due to near-field and far-field exposures at 2.45 GHz.

    Science.gov (United States)

    Oizumi, Takuya; Laakso, Ilkka; Hirata, Akimasa; Fujiwara, Osamu; Watanabe, Soichi; Taki, Masao; Kojima, Masami; Sasaki, Hiroshi; Sasaki, Kazuyuki

    2013-07-01

    The eye is said to be one of the most sensitive organs to microwave heating. According to previous studies, the possibility of microwave-induced cataract formation has been experimentally investigated in rabbit and monkey eyes, but not for the human eye due to ethical reasons. In the present study, the temperature elevation in the lens, the skin around the eye and the core temperature of numerical human and rabbit models for far-field and near-field exposures at 2.45 GHz are investigated. The temperature elevations in the human and rabbit models were compared with the threshold temperatures for inducing cataracts, thermal pain in the skin and reversible health effects such as heat exhaustion or heat stroke. For plane-wave exposure, the core temperature elevation is shown to be essential both in the human and in the rabbit models as suggested in the international guidelines and standards. For localised exposure of the human eye, the temperature elevation of the skin was essential, and the lens temperature did not reach its threshold for thermal pain. On the other hand, the lens temperature elevation was found to be dominant for the rabbit eye. PMID:23390146

  6. Numerical modeling of radionuclide migration in water-saturated planar fracture: study of performance of bentonite in the far-field region

    Energy Technology Data Exchange (ETDEWEB)

    Silveira, Claudia S. da; Alvim, Antonio C.M., E-mail: csilveira@con.ufrj.b [Universidade Federal do Rio de Janeiro (PEN/COPPE/UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-Graduacao de Engenharia. Programa de Energia Nuclear

    2011-07-01

    The analysis of radionuclide migration in fractured porous media is an important part of the safety assessment of a deep geologic disposal for high level radioactive wastes. In this work, numerical solution for simple geometry was developed to study radionuclide migration, including decay chain from a hypothetical repository, whereas the initial region of fracture is filled with bentonite which expanded from EBS (Engineered Barrier System). The following cases were considered: convective transport with constant velocity along the fracture, longitudinal hydrodynamic dispersion in the fracture along the fracture axis, molecular diffusion from fracture into rock matrix, sorption within rock matrix, sorption onto the surface of the fracture, radioactive decay, decay chain, and diffusion in bentonite extrusion region. For conservative analysis, the porous matrix adjacent to the fracture was subdivided into two different subdomains, each with different set of parameters and considering that the radionuclides were available for migration in the solubility limit, at fracture inlet, from the initial time. The partial differential equations that govern the physical system were discretized by finite differences, by using the Implicit Euler Method with forward scheme in the convective term. In this study, numerical simulation was performed for 100, 1000 and 10000 years, with and without bentonite extrusion, in order to compare the migration retardation obtained by bentonite located at the beginning of the fracture in saturated environment. The numerical simulation results showed the importance of extruded area in the far field region of the fractured host rock. (author)

  7. Prediction and measurement of the electromagnetic environment of high-power medium-wave and short-wave broadcast antennas in far field

    International Nuclear Information System (INIS)

    With the increasing city size, high-power electromagnetic radiation devices such as high-power medium-wave (MW) and short-wave (SW) antennas have been inevitably getting closer and closer to buildings, which resulted in the pollution of indoor electromagnetic radiation becoming worsened. To avoid such radiation exceeding the exposure limits by national standards, it is necessary to predict and survey the electromagnetic radiation by MW and SW antennas before constructing the buildings. In this paper, a modified prediction method for the far-field electromagnetic radiation is proposed and successfully applied to predict the electromagnetic environment of an area close to a group of typical high-power MW and SW wave antennas. Different from currently used simplified prediction method defined in the Radiation Protection Management Guidelines (H J/T 10. 3 -1996), the new method in this article makes use of more information such as antennas' patterns to predict the electromagnetic environment. Therefore, it improves the prediction accuracy significantly by the new feature of resolution at different directions. At the end of this article, a comparison between the prediction data and the measured results is given to demonstrate the effectiveness of the proposed new method. (authors)

  8. FDTD analysis of temperature elevation in the lens of human and rabbit models due to near-field and far-field exposures at 2.45 GHz

    International Nuclear Information System (INIS)

    The eye is said to be one of the most sensitive organs to microwave heating. According to previous studies, the possibility of microwave-induced cataract formation has been experimentally investigated in rabbit and monkey eyes, but not for the human eye due to ethical reasons. In the present study, the temperature elevation in the lens, the skin around the eye and the core temperature of numerical human and rabbit models for far-field and near-field exposures at 2.45 GHz are investigated. The temperature elevations in the human and rabbit models were compared with the threshold temperatures for inducing cataracts, thermal pain in the skin and reversible health effects such as heat exhaustion or heat stroke. For plane-wave exposure, the core temperature elevation is shown to be essential both in the human and in the rabbit models as suggested in the international guidelines and standards. For localised exposure of the human eye, the temperature elevation of the skin was essential, and the lens temperature did not reach its threshold for thermal pain. On the other hand, the lens temperature elevation was found to be dominant for the rabbit eye. (authors)

  9. Sorption of cellulose degradation products and associated components to clay minerals under far field conditions of an intermediate to low level nuclear waste repository

    International Nuclear Information System (INIS)

    Herein is detailed the determination of the distribution ratios (Rd) of binary (ligand-solid) systems using a standard batch adsorption technique. Two complexing organic ligands of major concern to nuclear waste management agencies have been used; cellulose degradation products (CDP), and ISA (Isosaccharinic acid, the major component of CDP). These two ligands have been used with the solids montmorillonite, kaolinite and a-goethite. Concentrations of CDP were determined using TOC (Total Organic Carbon) analysis over a concentration range of 1 mol/L to 1 x 10-4 mol/L. Concentrations of the organic ligand ISA were determined using radiometric analysis using both non-active ISA and radioactive 14C labelled Ca-ISA and 14C labelled Na-ISA over a concentration range of 1 mol/L to 1 x 10-6 mol/L. Construction of sorption isotherms has provided the maximum sorption capacities of the solid surfaces for the organic ligand ISA, along with calculation of Rd values for ISA and CDP sorption. The results suggest that sorption of ISA and CDP is minimal under near-neutral conditions over a wide ligand concentration range and that, therefore, retardation of these metal ligand complexes would be insignificant under far-field environmental conditions

  10. Verification of the NIKE3D structural analysis code by comparison against the analytic solution for a spherical cavity under a far-field uniaxial stress

    Energy Technology Data Exchange (ETDEWEB)

    Kansa, E.J.

    1989-01-01

    The original scope of this task was to simulate the stresses and displacements of a hard rock tunnel experimental design using a suitable three-dimensional finite element code. NIKE3D was selected as a suitable code for performing these primarily approximate linearly elastic 3D analyses, but it required modifications to include initial stress, shear traction boundary condition and excavation options. During the summer of 1988, such capabilities were installed in a special version of NIKE3D. Subsequently, we verified both the LLNL's commonly used version of NIKE3D and our private modified version against the analytic solution for a spherical cavity in an elastic material deforming under a far-field uniaxial stress. We find the results produced by the unmodified and modified versions of NIKE3D to be in good agreement with the analytic solutions, except near the cavity, where the errors in the stress field are large. As can be expected from a code based on a displacement finite element formulation, the displacements are much more accurate than the stresses calculated from the 8-noded brick elements. To reduce these errors to acceptable levels, the grid must be refined further near the cavity wall. The level of grid refinement required to simulate accurately tunneling problems that do not have spatial symmetry in three dimensions using the current NIKE3D code is likely to exceed the memory capacity of the largest CRAY 1 computers at LLNL. 8 refs., 121 figs.

  11. Verification of the NIKE3D structural analysis code by comparison against the analytic solution for a spherical cavity under a far-field uniaxial stress

    International Nuclear Information System (INIS)

    The original scope of this task was to simulate the stresses and displacements of a hard rock tunnel experimental design using a suitable three-dimensional finite element code. NIKE3D was selected as a suitable code for performing these primarily approximate linearly elastic 3D analyses, but it required modifications to include initial stress, shear traction boundary condition and excavation options. During the summer of 1988, such capabilities were installed in a special version of NIKE3D. Subsequently, we verified both the LLNL's commonly used version of NIKE3D and our private modified version against the analytic solution for a spherical cavity in an elastic material deforming under a far-field uniaxial stress. We find the results produced by the unmodified and modified versions of NIKE3D to be in good agreement with the analytic solutions, except near the cavity, where the errors in the stress field are large. As can be expected from a code based on a displacement finite element formulation, the displacements are much more accurate than the stresses calculated from the 8-noded brick elements. To reduce these errors to acceptable levels, the grid must be refined further near the cavity wall. The level of grid refinement required to simulate accurately tunneling problems that do not have spatial symmetry in three dimensions using the current NIKE3D code is likely to exceed the memory capacity of the largest CRAY 1 computers at LLNL. 8 refs., 121 figs

  12. Numerical modeling of deep oceanic slab dehydration: Implications for the possible origin of far field intra-continental volcanoes in northeastern China

    Science.gov (United States)

    Sheng, Jian; Liao, Jie; Gerya, Taras

    2016-03-01

    Intra-continental volcanoes have different origins compared to arc volcanoes, and several conflicting geodynamic mechanisms of intra-continental magmatism have been proposed, which require quantitative testing. In this paper, we investigate numerically possible influences of deep subducted slab dehydration processes for the development of intra-continental volcanoes distributed in northeastern China. We employ 2D thermo-mechanical numerical models to investigate the complex dynamics of long-term subduction process, including slab interaction with mantle transition zone, deep oceanic plate dehydration, trench rollback, and back-arc extension. Our experiments show systematically that water can be transported to the transition zone by stagnant slabs hydrating the overlaying deep asthenospheric mantle. Positively buoyant partially molten hydrous plumes arising from the hydrated area formed atop the slabs can propagate upwards and form partially molten mantle regions under the far field continental plate. Our numerical models thus suggest that the development of widely distributed intra-continental volcanism in northeastern China could be related to the rising of multiple relatively small hydrous plumes triggered by stagnant paleo-Pacific slab dehydration in the transition zone.

  13. Enhancement of the computational efficiency of the near-to-far field mapping in the finite-difference method and ray-by-ray method with the fast multi-pole plane wave expansion approach

    Science.gov (United States)

    Tang, Guanglin; Yang, Ping; Sun, Bingqiang; Panetta, R. Lee; Kattawar, George W.

    2016-06-01

    The finite-difference time-domain (FDTD) and ray-by-ray (RBR) methods are techniques used to calculate the optical properties of nonspherical particles for small-to-moderate and large size parameters, respectively. The former is a rigorous method, and the latter is an approximate geometric-physical optics-hybrid method that takes advantage of both high efficiency of the geometric optics approach and high accuracy of the physical optics approach. In these two methods, the far field is calculated by mapping the near field to the far field with consideration of the phase interference. The mapping computation is more time-consuming than the near-field simulation when multiple scattering directions are involved, particularly in the case of the RBR implementation. To overcome the difficulty, in this study the fast multi-pole method is applied to both FDTD and RBR towards accelerating the far-field calculation, without degrading the accuracy of the simulation results.

  14. 单侧声带振动的远场声压研究%Research on the far-field sound pressure model of unilateral vocal cord vibration

    Institute of Scientific and Technical Information of China (English)

    赵晓; 曹辉; 徐晨

    2013-01-01

    Based on the physical structure and the vibration characteristics of the unilateral vocal cords, this paper pro-posed a unilateral vocal cold vibration model. The far-field sound pressure distribution of the unilateral vocal cord vi-bration model was calculated on the usage of acoustic theory and Rayleigh Integral. The sound pressure distribution pattern was calculated by numerical simulation, which was compared with the sound pressure distribution of the normal vocal cold model in the radiated sound field. The results showed that the sound pressure ratio almost does not change with the change of the direction angle when the vocal cord gap width is identical in the audio frequency range. When the direction angle remains unchanged, the sound pressure ratio decreases linearly with the increase of pores.%根据单侧声带的生理结构和振动特性,提出单侧声带振动模型。运用声学基本理论,采用瑞利积分,计算了此单侧声带模型振动的远场声压分布,仿真数值计算了声压分布规律,并与正常声带模型辐射声场的声压进行比较。结果表明,在音频范围内,在声带空隙宽度相同的条件下,声压比值几乎不随方向角的改变而改变。而在方向角相同情况下,声压比值随着孔隙的增加呈线性下降。

  15. The near field/far field model with constant application of chemical mass and exponentially decreasing emission of the mass applied.

    Science.gov (United States)

    Nicas, Mark

    2016-07-01

    The near field/far field (NF/FF) model is a contaminant dispersion construct that permits making airborne contaminant exposure estimates for an individual located close to an emission source. In the present analysis, chemical emission involves a constant mass rate of chemical application to surfaces, denoted I (mg/min), and an exponentially decreasing rate of emission of the chemical from the surfaces with rate constant α (min(-1)). The time-dependent emission rate function is: G(t), mg/min = I - I exp(- αt), where time t is in minutes. The exact time-dependent equations for the contaminant concentration in the NF and the FF are presented. These equations are used to revise a previous analysis of a study in which a penetrant liquid containing benzene was applied to parts on a work table in a test room. The previous analysis assumed that the benzene was applied as a bolus at the start of a 15-min use period, whereas the present analysis assumes the same total benzene mass was applied at a uniform rate over the 15-min use period, but with the same evaporation rate constant α. The new G(t) function leads to a lower 15-min time weighted average NF benzene concentration that better matches the experimental data. It is also shown that the exact equation for the NF concentration is well approximated by combining two well-mixed single-zone equations. The approximation method is mathematically simpler and obviates the need to derive the exact NF equation. PMID:26861562

  16. Far-field sorption data bases for performance assessment of a L/ILW repository in an undisturbed Palfris marl host rock

    Energy Technology Data Exchange (ETDEWEB)

    Bradbury, M.H.; Baeyens, B. [Paul Scherrer Inst. (PSI), Villigen (Switzerland)

    1997-12-01

    A Palfris marl formation at Wellenberg (Gemeinde Wolfenschiessen, NW) has been chosen by NAGRA as a potential repository site for low- and intermediate-level radioactive waste, L/ILW. In the coming years a series of performance assessment studies will be performed for this site. One set of key data required for such safety analysis calculations is sorption data bases (SDB) for safety relevant radionuclides in the far-field. The purpose of this report is to describe the procedures used to generate sorption data bases appropriate for the in situ conditions existing along the different potential flow paths in an undisturbed marl host rock formation. An important aim was to document the sources of sorption data used and, in particular, the processes by which data selections were mad.e. The main guiding principles here were `transparency` and `traceability`. Inherent within this whole process is also the justification for, and defensibility of, the selected values. Much of the sorption data used to generate the SDB for marl came from the open literature. A major part of this report is concerned with describing the procedures whereby these initial literature values are modified so that they apply to the actual marl mineralogies and groundwater chemistries. The resulting `reference R{sub d} values` are then further modified using so called Lab -> Field transfer factors to produce sorption values which are appropriate to the in situ bulk rock conditions. The Lab -> Field transfer factors attempt to correct for the differences in sorption site availability between the crushed rock state used in batch tests and the intact rock state existing in reality in the host rock. There are two main groundwater chemistries and five characteristic mineralogical compositions which cover the three broad types of flow paths which have been identified in the Palfris marl formation. In principle the methodology described here to construct sorption data bases for marl is applicable to any

  17. Far-field sorption data bases for performance assessment of a L/ILW repository in an undisturbed Palfris marl host rock

    International Nuclear Information System (INIS)

    A Palfris marl formation at Wellenberg (Gemeinde Wolfenschiessen, NW) has been chosen by NAGRA as a potential repository site for low- and intermediate-level radioactive waste, L/ILW. In the coming years a series of performance assessment studies will be performed for this site. One set of key data required for such safety analysis calculations is sorption data bases (SDB) for safety relevant radionuclides in the far-field. The purpose of this report is to describe the procedures used to generate sorption data bases appropriate for the in situ conditions existing along the different potential flow paths in an undisturbed marl host rock formation. An important aim was to document the sources of sorption data used and, in particular, the processes by which data selections were mad.e. The main guiding principles here were 'transparency' and 'traceability'. Inherent within this whole process is also the justification for, and defensibility of, the selected values. Much of the sorption data used to generate the SDB for marl came from the open literature. A major part of this report is concerned with describing the procedures whereby these initial literature values are modified so that they apply to the actual marl mineralogies and groundwater chemistries. The resulting 'reference Rd values' are then further modified using so called Lab -> Field transfer factors to produce sorption values which are appropriate to the in situ bulk rock conditions. The Lab -> Field transfer factors attempt to correct for the differences in sorption site availability between the crushed rock state used in batch tests and the intact rock state existing in reality in the host rock. There are two main groundwater chemistries and five characteristic mineralogical compositions which cover the three broad types of flow paths which have been identified in the Palfris marl formation. In principle the methodology described here to construct sorption data bases for marl is applicable to any type of

  18. 47 CFR Appendix - Technical Appendix 2

    Science.gov (United States)

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Technical Appendix 2 Telecommunication NATIONAL TELECOMMUNICATIONS AND INFORMATION ADMINISTRATION, DEPARTMENT OF COMMERCE DIGITAL-TO-ANALOG CONVERTER BOX COUPON PROGRAM Waiver of household eligibility. Pt. 301, App. 2 Technical Appendix 2 TECHNICAL APPENDIX...

  19. Far field tsunami simulations of the 1755 Lisbon earthquake: Implications for tsunami hazard to the U.S. East Coast and the Caribbean

    Science.gov (United States)

    Barkan, R.; ten Brink, U.S.; Lin, J.

    2009-01-01

    The great Lisbon earthquake of November 1st, 1755 with an estimated moment magnitude of 8.5-9.0 was the most destructive earthquake in European history. The associated tsunami run-up was reported to have reached 5-15??m along the Portuguese and Moroccan coasts and the run-up was significant at the Azores and Madeira Island. Run-up reports from a trans-oceanic tsunami were documented in the Caribbean, Brazil and Newfoundland (Canada). No reports were documented along the U.S. East Coast. Many attempts have been made to characterize the 1755 Lisbon earthquake source using geophysical surveys and modeling the near-field earthquake intensity and tsunami effects. Studying far field effects, as presented in this paper, is advantageous in establishing constraints on source location and strike orientation because trans-oceanic tsunamis are less influenced by near source bathymetry and are unaffected by triggered submarine landslides at the source. Source location, fault orientation and bathymetry are the main elements governing transatlantic tsunami propagation to sites along the U.S. East Coast, much more than distance from the source and continental shelf width. Results of our far and near-field tsunami simulations based on relative amplitude comparison limit the earthquake source area to a region located south of the Gorringe Bank in the center of the Horseshoe Plain. This is in contrast with previously suggested sources such as Marqu??s de Pombal Fault, and Gulf of C??diz Fault, which are farther east of the Horseshoe Plain. The earthquake was likely to be a thrust event on a fault striking ~ 345?? and dipping to the ENE as opposed to the suggested earthquake source of the Gorringe Bank Fault, which trends NE-SW. Gorringe Bank, the Madeira-Tore Rise (MTR), and the Azores appear to have acted as topographic scatterers for tsunami energy, shielding most of the U.S. East Coast from the 1755 Lisbon tsunami. Additional simulations to assess tsunami hazard to the U.S. East

  20. The use of interaction matrices for identification, structuring and ranking of FEPs in a repository system. Application on the far-field of a deep geological repository for spent fuel

    International Nuclear Information System (INIS)

    The basic device in the Rock Engineering Systems approach, the interaction matrix, has been used to identify, structure and rank Features, Events, and Processes (FEPs) describing barrier performance and radionuclide behaviour in the far-field of a deep geologic repository for spent fuel. The result is a first version of the Process System (PS), for the far-field of a deep repository, structured in an interaction matrix with supporting documentation. The documentation is compiled in databases, one containing matrix specific information and one containing general FEP descriptions. The study has shown that an interaction matrix is feasible to use both for the structuring of the PS and for visualisation of the PS. The developed documentation system increases the transparency of the system description and makes it possible to trace back the judgements made during the construction of the matrix. This will facilitate review work and future revisions as well as consistent treatment of different issues in the system. This study is a first step in the application of a systematic method to establish a structured description of the PS for a deep repository for spent fuel. The work could be seen as a part of the preparation for the forthcoming performance and safety analysis. The next step would be to develop the PS for the remaining parts of the repository system to the same level as has been done for the far-field system. Before the PS is evaluated for different selected system premises, a scientific review of the contents of the PS for the whole repository system would be beneficial. 5 refs

  1. SYSTEMATIC INVESTIGATIONS OF SYNTHETIC JETS FAR FIELD

    Czech Academy of Sciences Publication Activity Database

    Tesař, Václav; Kordík, Jozef

    Prague : Institute of Hydrodynamics ASCR, v. v. i., 2009 - (Chára, Z.; Klaboch, L.), s. 99-109 ISBN 978-80-87117-06-4. [Symposium on Anemometry /23./. Holany -Litice (CZ), 02.06.2009-03.06.2009] R&D Projects: GA ČR GA101/07/1499; GA AV ČR IAA200760705 Institutional research plan: CEZ:AV0Z20760514 Keywords : synthetic jet * similarity solution * turbulence Subject RIV: BK - Fluid Dynamics

  2. Endometriosis of the Appendix

    OpenAIRE

    Al Oulaqi, Nasser S; Hefny, Ashraf F; Joshi, Sandyia; Salim, Khalid; Abu-Zidan, Fikri M

    2008-01-01

    Endometriosis is a well known cause of infertility. Endometriosis of the appendix is a very rare condition. To highlight this rare entity, we are reporting a case of a young lady who was admitted with recurrent attacks of lower abdominal pain associated with primary infertility. Preoperative diagnosis was acute appendicitis. Histopathological examination of the appendix revealed endometriosis. Endometriosis should be considered in the differential diagnosis of recurrent lower abdominal pain i...

  3. Ship Structural Response Analysis of Computational Modelling under Far-field Underwater Explosion%水下远场爆炸下船舶结构响应计算有限元建模方式影响分析

    Institute of Scientific and Technical Information of China (English)

    张安; 刘均; 程远胜

    2014-01-01

    利用有限元软件ABAQUS,针对船舶结构和设备采用不同建模方式,建立4种水下远场爆炸载荷作用下全船结构冲击响应计算的有限元模型,对比分析船体结构局部与总体冲击响应。结果表明:船舶骨材结构与设备的建模方式对结构局部冲击响应如加速度、应力等影响很大,而对结构的总体响应如剖面弯矩等刚性安装设备采用质量点均摊的方式处理以减小建模的工作量。对于大型的弹性安装设备,需采用质量点和弹簧单元仔细建模。%Four different FE models of ship structure and equipments were established to analysis the structural response un -der far-field underwater explosion in ABAQUS .The local and the overall hull structural responses from the four models were com -pared.The results showed that in the case of far-field underwater explosion , the local hull structural responses , such as accelera-tion and stress , are greatly influenced by the modeling methods of stiffeners and equipment .For overall structural responses , such as section moments , stiffeners can be treated as distributed mass in the shell and rigid mounted equipment can be simplified as distributed mass element to reduce workload .The modeling method of flexible mounted equipment has influence on both local hull structure impulse response and overall hull impulse response , so they should be fine modeled using mass elements and con-nector elements .

  4. SEISMIC RESPONSE OF COMPOSITE FRAME WITH CFST COLUMNS UNDER FAR-FIELD GROUND MOTION%远场地震作用下钢管混凝土组合框架的地震反应分析

    Institute of Scientific and Technical Information of China (English)

    王文达; 王军

    2012-01-01

    A typical 10-story composite frame with concrete filled steel tubular (CFST) columns was designed to study the seismic response under far-field ground motion. 28 far-field (>10km) ground motion records in the strong motion database from the Pacific Earthquake Engineering Research (PEER) Center were used for the ground motion input. The sites were divided into four types, named A, B, C and D respectively, according with the classification of United States Geological Survey (USGS). The nonlinear fiber beam-column element was used to simulate the CFST columns and beams, respectively, and the elastic-plastic dynamic time history analysis was performed using OpenSees under meeting more and rare earthquakes of the seismic precautionary intensity in 8 degrees. The results were compared with that of pushover analysis. It is shown that the seismic response of the composite frame exhibits some regularity under different sites and ground motions though the results are discrete. The inverted triangle lateral load pattern is more similar to the result of dynamic time history analysis than the uniform distribution lateral load pattern for the regular composite frame structures, thusly the inverted triangle lateral load pattern should be used to the pushover analysis for the composite frame with CFST columns.%为研究在远场地震动作用下钢管混凝土组合框架的反应,设计了某10层钢管混凝土组合框架,从PEER强震记录数据库中选取了28条远场(距离大于10km)强震地震动记录作为输入地震波,按美国地质勘探局(USGS)对场地类别分类方法将其分为A、B、C、D四类,基于OpenSees建立了非线性纤维梁柱单元的理论模型,对其进行了设防烈度为8度时多遇和罕遇地震作用下弹塑性时程分析,计算结果同时与Pushover分析结果进行了对比.结果表明:虽然不同地震动作用下钢管混凝土组合框架结构反应的离散性较大,但该类结构在不同场地类别下的反应

  5. Simulation study of the effects of near- and far-field heating during focused ultrasound uterine fibroid ablation using an electronically focused phased array: A theoretical analysis of patient safety

    Energy Technology Data Exchange (ETDEWEB)

    Ellens, Nicholas, E-mail: nicholas.ellens@utoronto.ca; Hynynen, Kullervo [Sunnybrook Research Institute, Toronto, Ontario M4N 3M5, Canada and Department of Medical Biophysics, University of Toronto, Toronto, Ontario M5G 1L7 (Canada)

    2014-07-15

    Purpose: Assess the feasibility of using large-aperture, flat ultrasonic transducer arrays with 6500 small elements operating at 500 kHz without the use of any mechanical components for the thermal coagulation of uterine fibroids. This study examines the benefits and detriments of using a frequency that is significantly lower than that used in clinical systems (1–1.5 MHz). Methods: Ultrasound simulations were performed using the anatomies of five fibroid patients derived from 3D MRI. Using electronic steering solely, the ultrasound focus from a flat, 6500-element phased array was translated around the volume of the fibroids in various patterns to assess the feasibility of completing full treatments from fixed physical locations. Successive temperature maps were generated by numerically solving the bioheat equation. Using a thermal dose model, the bioeffects of these simulations were quantified and analyzed. Results: The simulations indicate that such an array could be used to perform fibroid treatments to 18 EM{sub 43} at an average rate of 90 ± 20 cm{sup 3}/h without physically moving the transducer array. On average, the maximum near-field thermal dose for each patient was below 4 EM{sub 43}. Fibroid tissue could be treated as close as 40 mm to the spine without reaching temperatures expected to cause pain or damage. Conclusions: Fibroids were successfully targeted and treated from a single transducer position to acceptable extents and without causing damage in the near- or far-field. Compared to clinical systems, treatment rates were good. The proposed treatment paradigm is a promising alternative to existing systems and warrants further investigation.

  6. Simulation study of the effects of near- and far-field heating during focused ultrasound uterine fibroid ablation using an electronically focused phased array: A theoretical analysis of patient safety

    International Nuclear Information System (INIS)

    Purpose: Assess the feasibility of using large-aperture, flat ultrasonic transducer arrays with 6500 small elements operating at 500 kHz without the use of any mechanical components for the thermal coagulation of uterine fibroids. This study examines the benefits and detriments of using a frequency that is significantly lower than that used in clinical systems (1–1.5 MHz). Methods: Ultrasound simulations were performed using the anatomies of five fibroid patients derived from 3D MRI. Using electronic steering solely, the ultrasound focus from a flat, 6500-element phased array was translated around the volume of the fibroids in various patterns to assess the feasibility of completing full treatments from fixed physical locations. Successive temperature maps were generated by numerically solving the bioheat equation. Using a thermal dose model, the bioeffects of these simulations were quantified and analyzed. Results: The simulations indicate that such an array could be used to perform fibroid treatments to 18 EM43 at an average rate of 90 ± 20 cm3/h without physically moving the transducer array. On average, the maximum near-field thermal dose for each patient was below 4 EM43. Fibroid tissue could be treated as close as 40 mm to the spine without reaching temperatures expected to cause pain or damage. Conclusions: Fibroids were successfully targeted and treated from a single transducer position to acceptable extents and without causing damage in the near- or far-field. Compared to clinical systems, treatment rates were good. The proposed treatment paradigm is a promising alternative to existing systems and warrants further investigation

  7. Appendix E: Geology

    Energy Technology Data Exchange (ETDEWEB)

    Reidel, Steve; Chamness, Mickie A.

    2008-01-17

    This appendix provides a detailed description of geology under the Central Plateau of the Hanford Site, emphasizing the areas around tank farms. It is to be published by client CH2M HILL Hanford Group, Inc., as part of a larger, multi-contractor technical report.

  8. Analysis of the near-field-far-field pattern of tilted planar antenna arrays%斜置平面天线阵的近场-远场方向图分析

    Institute of Scientific and Technical Information of China (English)

    刘俊群

    2012-01-01

    Based on the principle of planar near-field measurement and theory on the spatial pattern of planar antenna arrays, a comprehensive investigation on the spatial pattern of planar antenna arrays tilting away from the planar near-field scanning plane is performed. An efficient computational algorithm on the near-field-far-field pattern in the plane determined by the rotation axis and normal line of the tilted array is developed. The parametric equations on the intersecting curve locus between the plane and unit directional sphere of the planar near-field scanning are thus derived. Consequently, the spatial pattern of the tilted antenna array based on the near-field data is calculated by fast Fourier transform technique, and at the same time a two-dimensional interpolating scheme to evaluate the pattern in the plane is developed. The capability, efficiency, and feasibility of this new algorithm are demonstrated by the good consistency of the calculated results with the numerical simulations and experimental measurements.%从平面近场扫描数据处理原理和平面天线阵方向图理论出发,分析了相对于平面近场扫描平面斜置的平面天线阵方向图.基于斜置平面天线阵的空间结构关系,选择阵面旋转轴与阵面法线形成的平面为性能评估考察平面,发展了一种快速计算性能评估平面方向图的方法.得出该平面与平面近场扫描坐标系单位方向球相交曲线的轨迹参数方程.利用快速傅里叶变换技术,计算出斜置平面天线阵平面近场扫描空间方向图,在此基础上结合轨迹参数方程和二维插值方法解出对应该性能评估平面的方向图数据.数值仿真和实际应用结果表明该分析结论和方法的可靠性与实用性.

  9. The Appendix on CT

    Energy Technology Data Exchange (ETDEWEB)

    Whitley, S. [Sunnybrook Health Sciences Center, Toronto, Ontario (Canada); Barts and the Royal London, Royal London Hospital, Whitechapel, London (United Kingdom)], E-mail: siobhanwhitley@yahoo.co.uk; Sookur, P.; McLean, A.; Power, N. [Barts and the Royal London, Royal London Hospital, Whitechapel, London (United Kingdom)

    2009-02-15

    Appendicitis can be a difficult clinical diagnosis to make. A negative appendicectomy rate of 20% has traditionally been accepted as the consequences of appendiceal perforation can be grave. Cross-sectional imaging is increasingly being employed in the investigation of adults with suspected appendicitis. This review will demonstrate the appearance of the normal appendix on computed tomography (CT) and its appearance in a range of inflammatory and neoplastic processes including appendicitis, Crohn's disease, infections, and benign and malignant tumour000.

  10. 40 CFR 1502.18 - Appendix.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 32 2010-07-01 2010-07-01 false Appendix. 1502.18 Section 1502.18 Protection of Environment COUNCIL ON ENVIRONMENTAL QUALITY ENVIRONMENTAL IMPACT STATEMENT § 1502.18 Appendix. If an agency prepares an appendix to an environmental impact statement the appendix shall:...

  11. The Chernobyl accident. Appendix B

    International Nuclear Information System (INIS)

    In appendix B, the models introduced in chapter 6 are applied to the study of the Chernobyl accident. This event is very important in the teaching of nuclear engineering, and I have included in this Appendix a relatively detailed description of the accident. However, the analysis is limited to the physics of the relevant phenomena. (author)

  12. NEAR AND FAR-FIELD EFFECTS OF TSUNAMIS GENERATED BY THE PAROXYSMAL ERUPTIONS, EXPLOSIONS, CALDERA COLLAPSES AND MASSIVE SLOPE FAILURES OF THE KRAKATAU VOLCANO IN INDONESIA ON AUGUST 26-27, 1883

    Directory of Open Access Journals (Sweden)

    George Pararas-Carayannis

    2003-01-01

    source region. It took approximately 2.5 hours for the tsunami waves to refract around Java and reach Batavia (Jakarta where the only operating tide gauge existed. Wavesof 2.4 meters in height were recorded - but with an unusually long period of 122 minutes. The long period is attributed to modification due to resonance effects and did not reflect source characteristics. The tsunami travel time to Surabaya at the eastern part of Java was 11.9 hours. The reported wave was only 0.2 meters.The far field effects of the tsunami were noticeable around the world, but insignificant. Small sea level oscillations were recorded by tide gauges at Port Blair in the Andaman Sea, at Port Elizabeth in South Africa, and as far away as Australia, New Zealand, Japan, Hawaii, Alaska, the North-American West Coast, South America, and even as far away as the English Channel. It took 12 hours for the tsunami to reach Aden on the southern tip of the Arabian Peninsula, about 3800 nautical miles away. The wave reported at Aden, at Port Blair and at Port Elizabeth, represents the actual tsunami generated in the Sunda Strait. There were no land boundaries on the Indian Ocean side of Krakatau to prevent the tsunami energy from spreading in that direction. The tsunami travel time of a little over 300 nautical miles per hour to Aden appears reasonable. However, it is doubtful that the waves, which were reported at distant locations in the Pacific or in the Atlantic Ocean, represented the actual tsunami generated in the Sunda Strait. Very little, if any at all, of the tsunami energy could have escaped the surrounding inland seas to the east of the Sunda Strait. Most probably, the small waves that were observed in the Pacific as well as in the Atlantic were generated by the atmospheric pressure wave of the major Krakatoa explosion, and not from the actual tsunami generated in the Sunda Strait. The unusual flooding, which occurred at the Bay of Cardiff, in the U.K., was caused by atmospheric coupling of

  13. Static and wind tunnel near-field/far-field jet noise measurements from model scale single-flow base line and suppressor nozzles. Summary report. [conducted in the Boeing large anechoic test chamber and the NASA-Ames 40by 80-foot wind tunnel

    Science.gov (United States)

    Jaeck, C. L.

    1977-01-01

    A test program was conducted in the Boeing large anechoic test chamber and the NASA-Ames 40- by 80-foot wind tunnel to study the near- and far-field jet noise characteristics of six baseline and suppressor nozzles. Static and wind-on noise source locations were determined. A technique for extrapolating near field jet noise measurements into the far field was established. It was determined if flight effects measured in the near field are the same as those in the far field. The flight effects on the jet noise levels of the baseline and suppressor nozzles were determined. Test models included a 15.24-cm round convergent nozzle, an annular nozzle with and without ejector, a 20-lobe nozzle with and without ejector, and a 57-tube nozzle with lined ejector. The static free-field test in the anechoic chamber covered nozzle pressure ratios from 1.44 to 2.25 and jet velocities from 412 to 594 m/s at a total temperature of 844 K. The wind tunnel flight effects test repeated these nozzle test conditions with ambient velocities of 0 to 92 m/s.

  14. 7 CFR 3402.16 - Appendix.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 15 2010-01-01 2010-01-01 false Appendix. 3402.16 Section 3402.16 Agriculture... FELLOWSHIP GRANTS PROGRAM Preparation of an Application § 3402.16 Appendix. Any additional supporting information deemed essential to enhancing the application should be included in an Appendix and referenced...

  15. Waste-Management Education and Research Consortium (WERC) annual progress report, 1991--1992. Appendixes

    Energy Technology Data Exchange (ETDEWEB)

    1992-04-07

    This report contains the following appendices: Appendix A - Requirements for Undergraduate Level; Appendix B - Requirements for Graduate Level; Appendix C - Graduate Degree In Environmental Engineering; Appendix D - Non-degree Certificate Program; Appendix E - Curriculum for Associate Degree Program; Appendix F - Curriculum for NCC Program; Appendix G - Information 1991 Teleconference Series; Appendix H - Information on 1992 Teleconference Series; Appendix I - WERC interactive Television Courses; Appendix J - WERC Research Seminar Series; Appendix K - Sites for Hazardous/Radioactive Waste Management Series; Appendix L- Summary of Technology Development of the Second Year; Appendix M - List of Major Publications Resulting from WERC; Appendix N - Types of Equipment at WERC Laboratories.

  16. Entrainment in the Near and Far Field of Fire Plumes

    OpenAIRE

    Cetegen, B. M.; Zukoski, E. E.; Kubota, T.

    1984-01-01

    This paper describes entrainment measurements made in fire plumes with a new technique. Measurements were in plumes rising from natural gas diffusion flames stabilized on 0.10, 0.19 and 0.50 m diameter burners and the heat release rates ranged from 10 to 200 kW. The heights examined ranged from elevations starting very close to the burner surface to distances about five times the average flame heights. Experiments indicate the presence of three regions: a region close to the burner surface wh...

  17. Far field hydrogeochemistry in the Oklo reactor area (Gabon)

    International Nuclear Information System (INIS)

    In the frame of a general study of the Oklo natural reactor, which takes into account the natural analogue aspect, a complete hydrogeological and hydrogeochemical study is undertaken. The partners of this study are the following: - Section de geochimie, CEA (France): P. Toulhoat, J.P. Gallien, P. L'Henoret, V. Moulin (groundwater chemistry and colloids). - Ecole des Mines de Paris (CIG, Fontainebleau) E. Ledoux, I. Gurban (hydrogeology and modelling) - SKB and Conterra AB (Sweden) J.A.T. Smellie, A. Winberg (hydrogeology, isotope geochemistry). The aim of this study is to try to understand and to characterize the possible mobilization of elements or isotopes when groundwaters come in contact with nuclear reaction zones. The first step of the study is presented here, which comprises a general geochemical and hydrodynamical characterization of the site. In this presentation, the site of Bagombe is also mentioned as it has been confirmed as sector in which nuclear fission reactions occurred as in Oklo. (author). 10 refs., 6 figs., 6 tabs

  18. A Far-Field Electro-Magnetic Tractor Beam Project

    Data.gov (United States)

    National Aeronautics and Space Administration — When the project began, our intention was to develop a more accurate model of the forces that could be obtained between experimentally demonstrate...

  19. Far-field coseismic ionospheric disturbances of Tohoku earthquake

    Czech Academy of Sciences Publication Activity Database

    Krasnov, V. M.; Drobzheva, Ya. V.; Chum, Jaroslav

    2015-01-01

    Roč. 135, December (2015), s. 12-21. ISSN 1364-6826 R&D Projects: GA ČR(CZ) GC15-07281J Institutional support: RVO:68378289 Keywords : earthquake * infrasonic waves * ionospheric disturbances * infrasound triggered by the earthquake * co-seismic ionospheric perturbations * modeling * remote sensing Subject RIV: DG - Athmosphere Science s, Meteorology Impact factor: 1.474, year: 2014 http://www. science direct.com/ science /article/pii/S1364682615300584

  20. Far Field Modeling Methods For Characterizing Surface Detonations

    Energy Technology Data Exchange (ETDEWEB)

    Garrett, A. [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)

    2015-10-08

    Savannah River National Laboratory (SRNL) analyzed particle samples collected during experiments that were designed to replicate tests of nuclear weapons components that involve detonation of high explosives (HE). SRNL collected the particle samples in the HE debris cloud using innovative rocket propelled samplers. SRNL used scanning electronic microscopy to determine the elemental constituents of the particles and their size distributions. Depleted uranium composed about 7% of the particle contents. SRNL used the particle size distributions and elemental composition to perform transport calculations that indicate in many terrains and atmospheric conditions the uranium bearing particles will be transported long distances downwind. This research established that HE tests specific to nuclear proliferation should be detectable at long downwind distances by sampling airborne particles created by the test detonations.

  1. Far-field hydrogeological model of Paks NPP

    International Nuclear Information System (INIS)

    Complete text of publication follows. The settlements in the vicinity of Paks NPP gain the drinking water from the lower Pannonian aquifers. Uncontrolled releases from the NPP enter into the shallow ground-water and they are transported to the Danube in the Quaternary alluvial sandy gravel layer. The hydraulic potential in the area increases with the depth, so leakage from the upper gravel layer to the lower aquifer is not possible in undisturbed circumstances. The question is that an overexploitation of drinking water can change the pressure conditions so that the contaminated water can enter from the upper gravel layer into the lower aquifer. To answer this question the Visual MODFLOW program was used to simulate the groundwater w, providing quantitative estimates of w rates, w paths and travel times. The simulation was designed to represent average steady-state w conditions. A mathematical model is a representation of a real system or process. The subsurface environment constitutes a complex, three-dimensional, heterogeneous hydrogeologic setting, which strongly influences groundwater flow and transport, and it can be described through careful hydrogeologic practice in the field. The conceptual model of the hydrogeological system in the surroundings of Paks NPP was constructed from the available geologic, hydrogeological, geographical and meteorological data. To obtain a unique solution of a generic model corresponding to a given area, additional information about the physical state of the system is required (boundary and initial conditions). The model was constructed on a 20km x 22km area, its eastern boundary is Danube, the others are defined as no w boundaries. The model consists of 5 main layers: upper sequences of Pleistocene alluvial sediments (sandy layer, Kx,y = 10-4m/s); lower sequences of Pleistocene alluvial sediments (gravel, Kx,y = 10-3m/s); upper Pannonian sediments of restricted transmissivity (Kx,y = 5 x 10-6m/s); Pannonian aquifer (Kx,y = 10-4m/s); lower Pannonian aquitard (Kx,y = 10-7m/s). The anisotropy factor for every layer was Kx,y/Kz = 10. Assuming average precipitation of 600 - 650 mm/y, a recharge rate of 10% (65 mm/y) and average water level in the Danube we found: - The groundwater in the Danube-valley is continuous and is recharged by precipitation in the higher elevations in Mezoefoeld. - The groundwater ws from the north- west to the south-east toward the Danube. - The mean residence time of groundwater in the lower Pannonian aquifer is 230 - 260 ys. - The contamination released from the NPP enters into the gravel and the ground-water transports it to the Danube. The water level of the Danube has little influence to the flow direction, but the travel times are shortened by low and increased by high water level. - The pressure conditions dont let the shallow groundwater and so the contamination w down to the Pannonian aquifer, rather an upwelling can be expected. - An increasing water production from the Pannonian aquifer can change the hydraulic heads and an overexploitation may alter the whole w system. In the present climatic conditions the enhancement of water production by a factor of four may change the basic w directions, and the contaminated water may get into the Pannonian aquifer. A permanent drought increases the vulnerability of the aquifer: because of the insufficient precipitation the recharge decreases, the hydraulic heads are depressed, and the w directions may reverse even in the case of restricted water production. (author)

  2. Strong far field coherent scattering of ultraviolet radiation by holococcolithophores

    CERN Document Server

    Quintero-Torres, R; Torres, M; Estrada, M; Cros, L

    2007-01-01

    By considering the structure of holococcoliths (calcite plates that cover holococcolithophores, a haploid phase of the coccolithophore life cycle) as a photonic structure, we apply a discrete dipolar approximation to study the light backscattering properties of these algae. We show that some holococcolith structures have the ability to scatter the ultraviolet (UV) radiation. This property may represent an advantage for holococcolithophores possessing it, by allowing them to live higher in the water column than other coccolithophores.

  3. Numerical simulation and first-order hazard analysis of large co-seismic tsunamis generated in the Puerto Rico trench: near-field impact on the North shore of Puerto Rico and far-field impact on the US East Coast

    Directory of Open Access Journals (Sweden)

    S. T. Grilli

    2010-10-01

    Full Text Available We perform numerical simulations of the coastal impact of large co-seismic tsunamis, initiated in the Puerto Rican trench, both in far-field areas along the upper US East coast (and other Caribbean islands, and in more detail in the near-field, along the Puerto Rico North Shore (PRNS. We first model a magnitude 9.1 extreme co-seismic source and then a smaller 8.7 magnitude source, which approximately correspond to 600 and 200 year return periods, respectively. In both cases, tsunami generation and propagation (both near- and far-field are first performed in a coarse 2′ basin scale grid, with ETOPO2 bathymetry, using a fully nonlinear and dispersive long wave tsunami model (FUNWAVE. Coastal runup and inundation are then simulated for two selected areas, using finer coastal nested grids. Thus, a 15″ (450 m grid is used to calculate detailed far-field impact along the US East Coast, from New Jersey to Maine, and a 3″ (90 m grid (for the finest resolution, encompassing the entire PRNS, is used to compute detailed near-field impact along the PRNS (runup and inundation. To perform coastal simulations in nested grids, accurate bathymetry/topography databases are constructed by combining ETOPO2 2′ data (in deep water and USGS' or NOAA's 15″ or 3″ (in shallow water data. In the far-field, runup caused by the extreme 9.1 source would be severe (over 10 m for some nearby Caribbean islands, but would only reach up to 3 m along the selected section of the East coast. A sensitivity analysis to the bathymetric resolution (for a constant 3″ model grid of runup along the PRNS, confirms the convergence of runup results for a topographic resolution 24″ or better, and thus stresses the importance of using sufficiently resolved bathymetric data, in order to accurately predict extreme runup values, particularly when bathymetric focusing is significant. Runup (10–22 m and inundation are found to be very large at most locations for the extreme 9

  4. 40 CFR Appendix C to Part 66 - Computer Program

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 15 2010-07-01 2010-07-01 false Computer Program C Appendix C to Part...) ASSESSMENT AND COLLECTION OF NONCOMPLIANCE PENALTIES BY EPA Pt. 66, App. C Appendix C to Part 66—Computer Program Note: For text of appendix C see appendix C to part 67....

  5. The new Audi A4; Der neue Audi A4

    Energy Technology Data Exchange (ETDEWEB)

    Basshuysen, R. van [ed.; Siebenpfeiffer, W. [comp.

    2000-11-01

    Details of the new Audi A4 are presented. The new car has a c{sub w} value of 0.28 in spite of a serial air conditioning system and a 'multitronic' control system for the 2.5 l V6 TDI engine with a rotary momentum of up to 310 Nm. A number of engines are available including a new spark ignition engine with a cubic capacity of 2 l and a five-valve technology. The high comfort of the car is illustrated by the examples of the voice-operated car phone and telematic system. Electrionic communication systems and infotainment are given high priority. The front window pane is heated by a 42 V heating system in order to improve the driving safety, and the air conditioning system was improved by two-zone contorl. This special issue of ATZ presents further details. [German] Mit der Weiterentwicklung des A4 hat Audi erneut seine Bereitschaft zum harten Wettbewerb im Segment der Mittelklasse signalisiert. Um die Kundenbeduerfnisse hinsichtlich sportlicher Dynamik und Komfort zu erfuellen, sind den Audi-Ingenieuren in vielen Details Loesungen gelungen, die den neuen A4 unverwechselbar machen. Hinter dem weiterentwickelten Audi-typischen Styling stecken innovative technische Entwicklungen. Die neu konstruierte Trapezlenker-Hinterachse beispielsweise verbessert die Fahreigenschaften. Ein c{sub w}-Wert von 0,28 bei den Basismotorisierungen - trotz serienmaessiger Klimaanlage - ist das Ergebnis umfangreicher Massnahmen bei der Aerodynamik. Die als vorbildlich geltende 'multitronic' ist nun auch fuer den 2,5-l-V6-TDI-Motor erhaeltlich und fuer ein Drehmoment von bis zu 310 Nm ausgelegt. Die Auswahl der Motoren - darunter ein neuer Ottomotor mit 2 l Hubraum und Fuenfventiltechnik - laesst kaum Wuensche offen. Was die Komfortausstattung betrifft, zeigt sich Audi mit dem neuen A4 wieder einmal als Trendsetter. Der Einsatz eines Sprachbediensystems fuer das Autotelefon und die angebotene Telematic sind Beispiele dafuer. Die gesamte Kommunikationselektronik und das

  6. Schwannoma of the appendix: a case report

    International Nuclear Information System (INIS)

    Schwannoma is a benign neurogenic tumor arising from the nerve sheath, and it presents as a well defined mass. Isolated gastrointestinal schwannoma is a relatively rare finding and schwannoma of the appendix is extremely rare. We report here on a case of schwannoma that arose from the appendix, and this lesion was pathologically confirmed

  7. 31 CFR Appendixes to Chapter V - Note

    Science.gov (United States)

    2010-07-01

    ... 31 Money and Finance: Treasury 3 2010-07-01 2010-07-01 false Note Appendixes to Chapter V Money... CONTROL, DEPARTMENT OF THE TREASURY Ch. V, Nt. Appendixes to Chapter V—Note Notes: The alphabetical lists.... References to regulatory parts in chapter V or other authorities: : Western Balkans Stabilization...

  8. 40 CFR Appendix A-4 to Part 60 - Test Methods 6 through 10B

    Science.gov (United States)

    2010-07-01

    ... Maintenance Requirements) of 40 CFR part 60, subpart A (General Provisions). Specific uses of these test... medium-coarse glass frit and borosilicate or quartz glass wool packed in top (see Figure 6-1) to...

  9. 基于光导微探针的近场/远场可扫描太赫兹光谱技术∗%Near-field and far-field scanning terahertz sp ectroscopy based on photo conductive microprob e

    Institute of Scientific and Technical Information of China (English)

    许悦红; 张伟力; 张学迁; 王球; 田震; 谷建强; 欧阳春梅; 路鑫超; 张文涛; 韩家广

    2016-01-01

    Recently, terahertz radiation has been a branch of cutting-edge science and technology involving many fields such as public security, military defense and national economy. In the past, far-field measurements were widely carried out based on terahertz time-domain spectroscopy. But the spatial resolution is limited by far-field diffraction effect. In order to break diffraction limit and gain sub-wavelength spatial resolution in terahertz frequency region, a series of near-field detection methods came into being, such as confocal microscopy, using an aperture, guided mode, scattering, direct detection in the near-field, etc. Each method has its own advantages and disadvantages. Using the photoconductive-antenna tip is one of the direct detection methods and it delivers the possibility of near-field measurements of terahertz waves. In this method, the photoconductive-antenna tip is a tapered photoconductive tip probe. So it can be close enough to the sample surface and receive the near-field signal on the basis of principle of photoconductivity. In this way, high spatial resolution can be gained. In this article, we introduce our recent progress of near-field and far- field scanning terahertz spectroscopy system with photoconductive-antenna in detail. Firstly, we analyze and summarize the near-field detection methods that have been developed in these years. And then, using the femtosecond laser whose center wavelength is 800 nm and the photoconductive-antenna tip detector coupled with fiber, we construct fiber near-field/far-field scanning terahertz spectroscopy (N/F-STS). The frequency bandwidth is in a range from 0.2 THz to 1.5 THz and the terahertz spot is circular and uniform indicated by performance test. Also the amplitude and phase of the terahertz field are recorded simultaneously. It has the ability to perform three-dimension scan in various experiment conditions conveniently. Finally, we introduce the real applications in our laboratory. N/F-STS can be used

  10. Appendix resonances on a simple graph

    International Nuclear Information System (INIS)

    We study the scattering problem on a graph consisting of a line with a finite-length appendix. The two parts are coupled through boundary conditions depending on three parameters; the motion on the line is free while the appendix supports a potential. The appendix bound states give rise to a ladder of resonances; we construct the resolvent and solve the corresponding pole condition for a weak coupling. In general, the condition only admits an analytic solution in particular cases. We find the pole positions numerically for a linear potential and show that the poles eventually return to the real axis when the coupling strength increases. (author)

  11. 12 CFR Appendix C to Subpart A of... - Appendix C to Subpart A of Part 327

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 4 2010-01-01 2010-01-01 false Appendix C to Subpart A of Part 327 C Appendix C to Subpart A of Part 327 Banks and Banking FEDERAL DEPOSIT INSURANCE CORPORATION REGULATIONS AND... degree of vulnerability to adverse economic, industry, market, and liquidity events. Examples include:...

  12. 40 CFR Appendix I to Subpart B of... - Appendix I to Subpart B of Part 205

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 24 2010-07-01 2010-07-01 false Appendix I to Subpart B of Part 205 I Appendix I to Subpart B of Part 205 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) NOISE ABATEMENT PROGRAMS TRANSPORTATION EQUIPMENT NOISE EMISSION CONTROLS Medium and Heavy Trucks...

  13. Radioactive wastes. Management prospects. Appendixes

    International Nuclear Information System (INIS)

    These appendixes complete the article BN3661 entitled 'Radioactive wastes. Management prospects'. They develop the principles of the different separation processes under study and make a status of the conditioning matrices that are envisaged: 1 - principles of advanced separation (separation of U, Np, Pu, Tc and I; separation of Am and Cm in two extraction steps (Diamex and Sanex processes); separation of Am and Cm in a single extraction step (Paladin process); separation of Am and Cm (Sesame process); separation of Cs (Calixarene process); 2 - principles of separation in pyro-chemistry: separation under inert atmosphere (non-oxidizing); separation in oxidizing conditions; 3 - conditioning matrices under study for separate elements: objectives and methodology, matrices for iodine, for cesium and for actinides. (J.S.)

  14. Appendix A: Word Parts and What They Mean

    Science.gov (United States)

    ... https://www.nlm.nih.gov/medlineplus/appendixa.html Appendix A: Word Parts and What They Mean To ... at the end of a medical word. This appendix supplements the MedlinePlus Understanding Medical Words tutorial. General ...

  15. Appendix

    DEFF Research Database (Denmark)

    Friis, Ib; Thulin, Mats

    2009-01-01

    A taxonomic and floristic account of all the additional or new species in Etyhiopia and/or Eritrea that have been discovered while Vols 2 - 7 of the Flora of Ethiopia and Eritrea were being published....

  16. Appendix.

    Science.gov (United States)

    Yaple, Ross A; O'Loughlin, Kerry; Hudziak, Jim

    2016-04-01

    This article is designed to serve as a reference for researchers and clinicians interested in extant evidence-based programs designed to promote healthy youth development. This article begins with a review of 2 freely available online registries of evidence-based youth development programs. Both registries compile information on healthy youth development programs and rate such programs on pre-established criteria. This article also outlines several specific model programs, which intervene on a variety of targets to promote healthy youth development. Lastly, this article also outlines emerging youth development programs. The model and emerging programs reviewed have resulted in myriad positive outcomes. PMID:26980133

  17. 40 CFR Appendix A to Part 63 - Test Methods

    Science.gov (United States)

    2010-07-01

    ....2.1A clearly written test method, preferably in the format of 40 CFR part 60, appendix A Test... reference from other methods in appendix A to 40 CFR part 60. Therefore, to obtain reliable results, persons... 40 Protection of Environment 14 2010-07-01 2010-07-01 false Test Methods A Appendix A to Part...

  18. 49 CFR Appendix to Part 38 - Guidance Material

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 1 2010-10-01 2010-10-01 false Guidance Material Appendix to Part 38... SPECIFICATIONS FOR TRANSPORTATION VEHICLES Pt. 38, App. Appendix to Part 38—Guidance Material This appendix....5. A research project sponsored by the Architectural and Transportation Barriers Compliance...

  19. 14 CFR Appendix C to Part 147 - Airframe Curriculum Subjects

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Airframe Curriculum Subjects C Appendix C... Appendix C to Part 147—Airframe Curriculum Subjects This appendix lists the subjects required in at least 750 hours of each airframe curriculum, in addition to at least 400 hours in general...

  20. 14 CFR Appendix D to Part 147 - Powerplant Curriculum Subjects

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Powerplant Curriculum Subjects D Appendix D... Appendix D to Part 147—Powerplant Curriculum Subjects This appendix lists the subjects required in at least 750 hours of each powerplant curriculum, in addition to at least 400 hours in general...

  1. 34 CFR Appendix B to Subpart B of... - Appendix I, Standards for Audit of Governmental Organizations, Programs, Activities, and...

    Science.gov (United States)

    2010-07-01

    ... 34 Education 3 2010-07-01 2010-07-01 false Appendix I, Standards for Audit of Governmental... Programs Pt. 668, Subpt. B, App. B Appendix B to Subpart B of Part 668—Appendix I, Standards for Audit of... in grant programs where authorizing agencies frequently want assurance in the auditor's report...

  2. 14 CFR Appendix F to Part 151 - Appendix F to Part 151

    Science.gov (United States)

    2010-01-01

    ...) AIRPORTS FEDERAL AID TO AIRPORTS Pt. 151, App. F Appendix F to Part 151 There is set forth below an.... Transformer or generator vaults. 11. Control panels for field lighting. 12. Control equipment for...

  3. 12 CFR 261a.4 - Fees.

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 3 2010-01-01 2010-01-01 false Fees. 261a.4 Section 261a.4 Banks and Banking... TO PERSONAL INFORMATION UNDER THE PRIVACY ACT OF 1974 General Provisions § 261a.4 Fees. (a) Copies of... Availability of Information, § 261.10 of this part. (b) No fee. Documents may be furnished without charge...

  4. 12 CFR 269a.4 - Investigator.

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 3 2010-01-01 2010-01-01 false Investigator. 269a.4 Section 269a.4 Banks and Banking FEDERAL RESERVE SYSTEM (CONTINUED) BOARD OF GOVERNORS OF THE FEDERAL RESERVE SYSTEM DEFINITIONS § 269a.4 Investigator. The term investigator means the officer designated by the panel to investigate...

  5. 32 CFR 383a.4 - Organization.

    Science.gov (United States)

    2010-07-01

    ... 32 National Defense 2 2010-07-01 2010-07-01 false Organization. 383a.4 Section 383a.4 National Defense Department of Defense (Continued) OFFICE OF THE SECRETARY OF DEFENSE (CONTINUED) ORGANIZATIONAL CHARTERS DEFENSE COMMISSARY AGENCY (DeCA) § 383a.4 Organization. (a) The DeCA is established as an...

  6. 22 CFR 9a.4 - Classification.

    Science.gov (United States)

    2010-04-01

    ... State shall follow the standards in E.O. 11652 and the provisions of 22 CFR 9.5 through 9.8. ... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Classification. 9a.4 Section 9a.4 Foreign... ENERGY PROGRAMS; RELATED MATERIAL § 9a.4 Classification. (a) Section 1 of E.O. 11932, August 4,...

  7. 76 FR 30250 - Share Insurance and Appendix

    Science.gov (United States)

    2011-05-25

    ... regarding noninterest-bearing transaction accounts. 75 FR 80367 (December 22, 2010). The following... ADMINISTRATION 12 CFR Part 745 RIN 3133-AD79 Share Insurance and Appendix AGENCY: National Credit Union... transaction account. Although this insurance coverage is self- implementing, and therefore already in...

  8. Energy 21. Preconditions and results. Appendix

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    This appendix comprises the following 5 scenarios: Reference scenario for electricity and district heating supply; Action plan scenario for electricity and district heat supply; Energy balances for reference and action plan scenarios; Investments and operating costs for user installations; Projection of CO{sub 2} emissions from the transport sector. (EG)

  9. The environmental survey manual: Appendix D

    International Nuclear Information System (INIS)

    The purpose of this manual is to provide guidance to the Survey and Sampling and Analysis teams that conduct the one-time Environmental Survey of the major US Department of Energy operating facilities. This appendix contains procedures for chemical analysis of organics, inorganics, and radioisotopes

  10. Mucocele of the appendix. Radiological findings

    International Nuclear Information System (INIS)

    Radiological findings of CT and MRI were evaluated in 11 cases of mucocele of the appendix. Mucocele is a rare disease entity and preoperative diagnosis is very important. The radiological findings were a well defined cystic mass with a wall of variable thickness. Nodular lesion in the wall of the mucocele may be a suggestive finding of malignant case of mucocele. (author)

  11. Appendix B: Methodology. [2014 Teacher Prep Review

    Science.gov (United States)

    Greenberg, Julie; Walsh, Kate; McKee, Arthur

    2014-01-01

    The "NCTQ Teacher Prep Review" evaluates the quality of programs that provide preservice preparation of public school teachers. This appendix describes the scope, methodology, timeline, staff, and standards involved in the production of "Teacher Prep Review 2014." Data collection, validation, and analysis for the report are…

  12. Appendix to Power Dissipation in Division

    DEFF Research Database (Denmark)

    Liu, Wei; Nannarelli, Alberto

    This document is an appendix to the paper: Wei Liu and Alberto Nannarelli, ”Power Dissipation in Division”, Proc. of 42nd Asilomar Conference on Signals, Systems, and Computers, October 2008. The purpose of the document is to provide the necessary information for the implementation of the...

  13. Primary lymphoma of appendix: Ultrasound finding

    International Nuclear Information System (INIS)

    We present an uncommon case of primary lymphoma of the appendix in a patient who complained of discomfort in lower right quadrant. The findings revealed by ultrasound, barium enema and CT scan are reported and the diagnostic aspects of this appendiceal tumor and others are discussed. (Author) 6 refs

  14. TORSION OF THE VERMIFORM APPENDIX: A CASE REPORT

    Directory of Open Access Journals (Sweden)

    Dr. Imtiaz Wani

    2009-07-01

    Full Text Available Torsion of the vermiform appendix is a rare condition with few cases reported in the literature. Various factors predispose to torsion. Various factors predispose to torsion. We report a case of primary torsion of the vermiform appendix. The clinical presentation was indistinguishable from acute appendicitis and the diagnosis was made at operation. Appendix was preileal in position and the direction of torsion was anticlockwise. There was intrinsic torsion with no obvious factor for torsion identified. Appendectomy was performed.

  15. Endometriosis of the Appendix Resulting in Perforated Appendicitis

    OpenAIRE

    Hasegawa, Toru; Yoshida, Koichi; Matsui, Kazuhiro

    2007-01-01

    Endometriosis is a relatively common disease among women of reproductive age. However, gastrointestinal endometriosis is rare and endometriosis of the appendix resulting in perforated appendicitis is even rarer. We experienced a case of endometriosis of the appendix manifesting as panperitonitis caused by perforation of the appendix. The patient was a 35-year-old woman who was hospitalized with an acute abdomen. She was diagnosed with panperitonitis and underwent urgent laparotomy. When perfo...

  16. CT appearance of the normal appendix in adults

    Energy Technology Data Exchange (ETDEWEB)

    Tamburrini, Stefania [Universita' di Napoli Federico II, Dip. Sc. Biomorfologiche e Funzionali, Naples (Italy); UCSD Medical Center, Department of Radiology, San Diego, CA (United States); Brunetti, Arturo [Universita' di Napoli Federico II, Dip. Sc. Biomorfologiche e Funzionali, Naples (Italy); Brown, Michele; Sirlin, Claude B.; Casola, Giovanna [UCSD Medical Center, Department of Radiology, San Diego, CA (United States)

    2005-10-01

    The aims of this study were to identify (1) the normal range of the appendix on computed tomography (CT), (2) the correlation of patient age and sex with the visibility and appearance of the appendix on CT, and (3) the normal variations in wall thickness, intraluminal content, and location of the appendix. Three hundred seventy-two outpatients underwent abdominopelvic CT. The scans were reviewed on the picture archiving and communication system and appendiceal outer-to-outer wall diameter, wall thickness, location, content and its correlation with appendix diameter were analyzed. The appendix was visualized in 305/372 patients. Its location relative to the cecum was highly variable. The diameter range was 3-10 mm; in 42% of cases the diameter was greater than 6 mm. When the intraluminal content (185/305) was visualized, the diameter was slightly superior to the mean (p=0.0156). In 329 CT scans in which oral contrast material was given, the appendix was filled by contrast material in 74/329 patients. The appendix wall thickness was measurable in 22/305 patients (average 0.15 cm). There is significant overlap between the normal and abnormal CT appearance of the appendix. Consequently the diagnosis of acute appendicitis should be based not only on the appearance of the appendix but also on the presence of secondary signs. (orig.)

  17. CT appearance of the normal appendix in adults

    International Nuclear Information System (INIS)

    The aims of this study were to identify (1) the normal range of the appendix on computed tomography (CT), (2) the correlation of patient age and sex with the visibility and appearance of the appendix on CT, and (3) the normal variations in wall thickness, intraluminal content, and location of the appendix. Three hundred seventy-two outpatients underwent abdominopelvic CT. The scans were reviewed on the picture archiving and communication system and appendiceal outer-to-outer wall diameter, wall thickness, location, content and its correlation with appendix diameter were analyzed. The appendix was visualized in 305/372 patients. Its location relative to the cecum was highly variable. The diameter range was 3-10 mm; in 42% of cases the diameter was greater than 6 mm. When the intraluminal content (185/305) was visualized, the diameter was slightly superior to the mean (p=0.0156). In 329 CT scans in which oral contrast material was given, the appendix was filled by contrast material in 74/329 patients. The appendix wall thickness was measurable in 22/305 patients (average 0.15 cm). There is significant overlap between the normal and abnormal CT appearance of the appendix. Consequently the diagnosis of acute appendicitis should be based not only on the appearance of the appendix but also on the presence of secondary signs. (orig.)

  18. Goblet cell carcinoid of the appendix

    Directory of Open Access Journals (Sweden)

    Pahlavan Payam S

    2005-06-01

    Full Text Available Abstract Background Goblet cell carcinoid (GCC of the appendix is a rare neoplasm that share histological features of both adenocarcinoma and carcinoid tumor. While its malignant potential remains unclear, GCC's are more aggressive than conventional carcinoid. The clinical presentations of this neoplasm are also varied. This review summarizes the published literature on GCC of the appendix. The focus is on its diagnosis, histopathological aspects, clinical manifestations, and management. Methods Published studies in the English language between 1966 to 2004 were identified through Medline keyword search utilizing terms "goblet cell carcinoid," "adenocarcinoid", "mucinous carcinoid" and "crypt cell carcinoma" of the appendix. Results Based on the review of 57 published papers encompassing nearly 600 diagnosed patients, the mean age of presentation for GCC of the appendix was 58.89 years with equal representation in both males and females. Accurate diagnosis of this neoplasm requires astute observations within an acutely inflamed appendix as this neoplasm has a prominent pattern of submucosal growth and usually lacks the formation of a well-defined tumor mass. The mesoappendix was involved in 21.64% followed by perineural involvement in 2.06%. The most common clinical presentations in order of frequency were acute appendicitis in 22.5%; asymptomatic in 5.4%; non-localized abdominal pain in 5.15% and an appendicular mass in 3.09%. The most common surgical treatment of choice was appendectomy with right hemicolectomy in 34.70% followed by simple appendectomy in 24.57%. Concomitant distant metastasis at diagnosis was present in 11.16% of patients with the ovaries being the most common site in 3.60% followed by disseminated abdominal carcinomatosis in 1.03%. Local lymph node involvement was seen in 8.76% of patients at the time of diagnosis. The reported 5-year survival ranges from 60 % to 84%. GCC's of the appendix remains a neoplasm of unpredictable

  19. Carcinoid tumor of the cecal appendix

    International Nuclear Information System (INIS)

    The carcinoid tumors of the cecal appendix are the most frequent of all appendicular tumors, with no clinical manifestations in general. The general objective of this paper was to present an interesting case of carcinoid tumor found in a 26 years-old woman, whose clinical picture was diagnosed as subacute appendicitis. She was hospitalized and treated with antibiotics with good recovery and discharged 10 days later. She had no abdominal tumors confirmed clinically and echographically at that time. Three months later, the patient was operated on and underwent cecal appendicectomy. The pathological anatomy analysis yielded argentaffinoma in the distal third of the cecal appendix with mucosal infiltration. She was referred to the oncology service to be followed up. She has been free from any complication with good recovery for 10 years. The annual ultrasound and the CT scan show that there is neither regional adenopathy nor hepatic metastasis

  20. Crohn's disease limited to the vermiform appendix

    DEFF Research Database (Denmark)

    Bak, Martin; Andersen, J C

    1987-01-01

    Thirteen cases of Crohn's disease confined to the vermiform appendix were seen during a 12-year period. They constituted 16.9% of patients with primary resection of the bowel for Crohn's disease in the same period, but only 0.4% of the cases of acute appendicitis. In 10 of the 13 cases there was...... to approach that of recurrence after resection in other parts of the intestines. Collective review of this and three other relatively large case series gave an estimated recurrence rate of 3.5%. We conclude that in Crohn's disease initially confined to the appendix the course appears to be indolent....... marked fibrous thickening of the appendiceal wall, and in 11 there were epithelioid cell granulomas. Appendectomy was performed in all cases. None had postoperative fistula or later manifestations of the disease within the observation time averaging 6.3 years. The recurrence rate was previously believed...

  1. Appendix - A small scale research review

    DEFF Research Database (Denmark)

    Larsen, Lea Lund

    A small scale research review This appendix provides an analysis of a small scale search for empirical studies regarding the efficacy of adult teacher training. The appendix is a part of a paper delivered at the ASEM conference, June 2009, Bergisch Gladbach, Germany. The paper tries to shed light...... over two questions asked in the abstract concerning workshop C - Effects of teacher training in lifelong learning - at the current ASEM conference. At first it is asked what do we already know about teacher training effects in relation to adult learners? This will be identified by a search for...... systematic reviews in the international This will be identified by a search for systematic reviews in the international clearinghouses and afterwards by a small scale mapping done in the pedagogic databaseERIC. The second question sounds: which methods can be used to measure the effects of teacher...

  2. Appendix XV: KEPCO's e-learning system

    International Nuclear Information System (INIS)

    Korea Electric Power Corporation (KEPCO). KEPCO is a government-owned company operating three training centers (one central training center and two local training centers) providing the off-line and on-line education regarding the duty-related and general education. This appendix shows KEPCO's conceptual E-learning system based on Information Technology (IT) had been developed to train/educate the employee at any time and place

  3. Angola: Selected Issues and Statistical Appendix

    OpenAIRE

    International Monetary Fund

    2005-01-01

    This Selected Issues paper and Statistical Appendix on Angola underlie monetary policy framework. Angola has adopted an anti-inflation policy that has led to a sharp decline in inflation. To institute a monetary policy framework, a nominal anchor or constraint on the value of domestic currency must be established. Additional work to fine-tune the measures of currency in circulation, conduct more sophisticated tests to assess the relationship between inflation and the monetary aggregates, and ...

  4. Appendix B - GPRA06 biomass program documentation

    Energy Technology Data Exchange (ETDEWEB)

    None, None

    2009-01-18

    This appendix discusses the assumptions and methods employed in the biomass benefits analysis that is part of the fiscal year 2006 GPRA benefits analysis for all of the Department of Energy’s Energy Efficiency and Renewable Energy (EERE) research and deployment programs. The biomass benefits analysis focuses on the benefits of future achievements by the program and excludes retrospective benefits and benefits resulting from industry’s own initiative and funding.

  5. Algeria: Selected Issues and Statistical Appendix

    OpenAIRE

    International Monetary Fund

    2003-01-01

    This Selected Issues paper and Statistical Appendix deals with the issue of low growth in Algeria. A growth-accounting exercise indicates that negative total factor productivity growth explains Algeria’s low growth rates. This paper highlights the sources of this low growth that mainly consist of incomplete structural reforms and the weaknesses of Algeria’s institutions. It describes policy recommendations, focusing on the institutional reforms required to improve the business environment...

  6. Solomon Islands; Tax Summary and Statistical Appendix

    OpenAIRE

    International Monetary Fund

    2008-01-01

    This Tax Summary and Statistical Appendix for the Solomon Islands outlines the summary of various taxes. Residents are taxed on their worldwide income. Nonresidents are taxed on income sourced from the Solomon Islands. Both resident and nonresident investors undertaking commercial, economic, industrial or professional activity in the Solomon Islands may apply to the Commissioner of Inland Revenue for an exemption from income tax. An excise duty is levied on plugs, twist, fig, stick, cake, and...

  7. Online Appendix to Efficient Timing of Retirement

    OpenAIRE

    Geoffrey H. Kingston

    2001-01-01

    Post-retirement, the model in the main text (published in the Review of Economic Dynamics) reduces to the Merton (1969) problem, which has of course an exact solution. Pre-retirement, however, the agent holds an American option, namely, retire now or keep working. Problems involving American options are generally difficult to solve exactly. This appendix describes an approximate solution to the agent's pre-retirement problem.

  8. The combination of neuroendocrine tumor and mucinous neoplasm of the appendix: A case report

    International Nuclear Information System (INIS)

    Primary neoplasm of the appendix is an uncommon pathology, representing 0.5-1% of all appendix specimens. Especially, simultaneous occurrence of two tumors of the appendix was rarely documented. We report a case of the concomitant neuroendocrine tumor and the mucinous neoplasm of the appendix on abdominal computed tomography, in a 62-year-old female who came for a check-up.

  9. 31 CFR Appendix C to Part 359 - Investment Considerations

    Science.gov (United States)

    2010-07-01

    ... 31 Money and Finance: Treasury 2 2010-07-01 2010-07-01 false Investment Considerations C Appendix...) FISCAL SERVICE, DEPARTMENT OF THE TREASURY BUREAU OF THE PUBLIC DEBT OFFERING OF UNITED STATES SAVINGS BONDS, SERIES I Pt. 359, App. C Appendix C to Part 359—Investment Considerations 1. What are some...

  10. 49 CFR Appendix C to Part 599 - Electronic Transaction Screen

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 7 2010-10-01 2010-10-01 false Electronic Transaction Screen C Appendix C to Part 599 Transportation Other Regulations Relating to Transportation (Continued) NATIONAL HIGHWAY TRAFFIC... ASSISTANCE TO RECYCLE AND SAVE ACT PROGRAM Pt. 599, App. C Appendix C to Part 599—Electronic...

  11. Exposition concerning small windmills. Appendix to main report. Volume 1

    International Nuclear Information System (INIS)

    This appendix to the main report entitled ''Exposition Concerning Small Windmills'' includes background information on the report, profiles of the participating companies and of those visited in Denmark and abroad, questionnaires and interview schemes sent to the participating companies, surveys of producers of Danish and foreign producers of small windmills and an appendix to the economical calculations found within the report. (AB)

  12. 25 CFR Appendix B to Part 276 - Financial Reporting Requirements

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Financial Reporting Requirements B Appendix B to Part 276...—Financial Reporting Requirements A. Purpose and scope. This appendix prescribes requirements for grantee to report financial information to the Bureau and to request advances and reimbursement when a...

  13. 40 CFR Appendix B to Part 61 - Test Methods

    Science.gov (United States)

    2010-07-01

    ... CFR part 60. Therefore, to obtain reliable results, persons using this method should have a thorough... performance. Some material is incorporated by reference from methods in appendix A to 40 CFR part 60 and in... 40 Protection of Environment 8 2010-07-01 2010-07-01 false Test Methods B Appendix B to Part...

  14. 31 CFR Appendix A to Part 500 - Qualifying International Institutions

    Science.gov (United States)

    2010-07-01

    ... 31 Money and Finance: Treasury 3 2010-07-01 2010-07-01 false Qualifying International Institutions A Appendix A to Part 500 Money and Finance: Treasury Regulations Relating to Money and Finance... Pt. 500, App. A Appendix A to Part 500—Qualifying International Institutions Asian Development...

  15. 10 CFR Appendix B to Part 436 - Goal Setting Methodology

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 3 2010-01-01 2010-01-01 false Goal Setting Methodology B Appendix B to Part 436 Energy... Appendix B to Part 436—Goal Setting Methodology In establishing and updating agency goals for energy... energy consumption goal, with the assumption that funds for executing the planned projects will...

  16. 49 CFR Appendix A to Part 178 - Specifications for Steel

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 2 2010-10-01 2010-10-01 false Specifications for Steel A Appendix A to Part 178.... 178, App. A Appendix A to Part 178—Specifications for Steel Table 1 Designation Chemical composition... ladle analysis may be 1.40 percent. 6 Rephosphorized Grade 3 steels containing no more than 0.15...

  17. 14 CFR Appendix J to Part 25 - Emergency Evacuation

    Science.gov (United States)

    2010-01-01

    ... airplane emergency lighting system. (b) The airplane must be in a normal attitude with landing gear... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Emergency Evacuation J Appendix J to Part... AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES Pt. 25, App. J Appendix J to Part 25—Emergency...

  18. 14 CFR Appendix A to Part 125 - Additional Emergency Equipment

    Science.gov (United States)

    2010-01-01

    ... landing. (e) Emergency exit operating handles. (1) For a passenger-carrying airplane for which the... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Additional Emergency Equipment A Appendix A... Appendix A to Part 125—Additional Emergency Equipment (a) Means for emergency evacuation. Each...

  19. 40 CFR Appendix A to Part 272 - State Requirements

    Science.gov (United States)

    2010-07-01

    ... citations affecting appendix A to part 272, see the List of CFR Sections Affected, which appears in the...) APPROVED STATE HAZARDOUS WASTE MANAGEMENT PROGRAMS Pt. 272, App. A Appendix A to Part 272—State... 17.53.111” in the introductory paragraph), 17.53.111(3) (except the phrase “and the generator...

  20. 40 CFR Appendixes I-Vii to Part 85 - [Reserved

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 18 2010-07-01 2010-07-01 false I Appendixes I-VII to Part 85 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF AIR POLLUTION FROM MOBILE SOURCES Appendixes I-VII to Part 85...

  1. 40 CFR Appendixes Vi-Vii to Part 600 - [Reserved

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 29 2010-07-01 2010-07-01 false VI Appendixes VI-VII to Part 600 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) ENERGY POLICY FUEL ECONOMY AND CARBON-RELATED EXHAUST EMISSIONS OF MOTOR VEHICLES Appendixes VI-VII to Part 600...

  2. 40 CFR Appendixes Vii-Viii to Part... - [Reserved

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 25 2010-07-01 2010-07-01 false VII Appendixes VII-VIII to Part 264 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) SOLID WASTES (CONTINUED) STANDARDS FOR OWNERS AND OPERATORS OF HAZARDOUS WASTE TREATMENT, STORAGE, AND DISPOSAL FACILITIES Appendixes...

  3. 32 CFR Appendix to Part 145 - Legal Representation

    Science.gov (United States)

    2010-07-01

    ... 32 National Defense 1 2010-07-01 2010-07-01 false Legal Representation Appendix to Part 145 National Defense Department of Defense OFFICE OF THE SECRETARY OF DEFENSE PERSONNEL, MILITARY AND CIVILIAN COOPERATION WITH THE OFFICE OF SPECIAL COUNSEL OF THE MERIT SYSTEMS PROTECTION BOARD Pt. 145, App. Appendix to Part 145—Legal Representation 1....

  4. 12 CFR Appendix A to Part 411 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 4 2010-01-01 2010-01-01 false Certification Regarding Lobbying A Appendix A to Part 411 Banks and Banking EXPORT-IMPORT BANK OF THE UNITED STATES NEW RESTRICTIONS ON LOBBYING Pt. 411, App. A Appendix A to Part 411—Certification Regarding Lobbying Certification for...

  5. 45 CFR Appendix A to Part 93 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-10-01

    ... 45 Public Welfare 1 2010-10-01 2010-10-01 false Certification Regarding Lobbying A Appendix A to... ON LOBBYING Pt. 93, App. A Appendix A to Part 93—Certification Regarding Lobbying Certification for... Standard Form-LLL, “Disclosure Form to Report Lobbying,” in accordance with its instructions. (3)...

  6. 7 CFR Appendix A to Part 3018 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 15 2010-01-01 2010-01-01 false Certification Regarding Lobbying A Appendix A to Part... OFFICER, DEPARTMENT OF AGRICULTURE NEW RESTRICTIONS ON LOBBYING Pt. 3018, App. A Appendix A to Part 3018—Certification Regarding Lobbying Certification for Contracts, Grants, Loans, and Cooperative Agreements...

  7. 38 CFR Appendix A to Part 45 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-07-01

    ... Lobbying A Appendix A to Part 45 Pensions, Bonuses, and Veterans' Relief DEPARTMENT OF VETERANS AFFAIRS (CONTINUED) NEW RESTRICTIONS ON LOBBYING Pt. 45, App. A Appendix A to Part 45—Certification Regarding Lobbying Certification for Contracts, Grants, Loans, and Cooperative Agreements The undersigned...

  8. 29 CFR Appendix A to Part 93 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-07-01

    ... 29 Labor 1 2010-07-01 2010-07-01 true Certification Regarding Lobbying A Appendix A to Part 93 Labor Office of the Secretary of Labor NEW RESTRICTIONS ON LOBBYING Pt. 93, App. A Appendix A to Part 93—Certification Regarding Lobbying Certification for Contracts, Grants, Loans, and Cooperative Agreements...

  9. 32 CFR Appendix A to Part 28 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-07-01

    ... 32 National Defense 1 2010-07-01 2010-07-01 false Certification Regarding Lobbying A Appendix A to... AGREEMENT REGULATIONS NEW RESTRICTIONS ON LOBBYING Pt. 28, App. A Appendix A to Part 28—Certification Regarding Lobbying Certification for Contracts, Grants, Loans, and Cooperative Agreements The...

  10. 10 CFR Appendix A to Part 601 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 4 2010-01-01 2010-01-01 false Certification Regarding Lobbying A Appendix A to Part 601 Energy DEPARTMENT OF ENERGY (CONTINUED) ASSISTANCE REGULATIONS NEW RESTRICTIONS ON LOBBYING Pt. 601, App. A Appendix A to Part 601—Certification Regarding Lobbying Certification for Contracts, Grants,...

  11. 45 CFR Appendix A to Part 1230 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-10-01

    ... 45 Public Welfare 4 2010-10-01 2010-10-01 false Certification Regarding Lobbying A Appendix A to... AND COMMUNITY SERVICE NEW RESTRICTIONS ON LOBBYING Pt. 1230, App. A Appendix A to Part 1230—Certification Regarding Lobbying Certification for Contracts, Grants, Loans, and Cooperative Agreements...

  12. 20 CFR Appendix A to Part 438 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-04-01

    ... 20 Employees' Benefits 2 2010-04-01 2010-04-01 false Certification Regarding Lobbying A Appendix A to Part 438 Employees' Benefits SOCIAL SECURITY ADMINISTRATION RESTRICTIONS ON LOBBYING Pt. 438, App. A Appendix A to Part 438—Certification Regarding Lobbying Certification for Contracts, Grants,...

  13. 22 CFR Appendix A to Part 519 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-04-01

    ... 22 Foreign Relations 2 2010-04-01 2010-04-01 true Certification Regarding Lobbying A Appendix A to Part 519 Foreign Relations BROADCASTING BOARD OF GOVERNORS NEW RESTRICTIONS ON LOBBYING Pt. 519, App. A Appendix A to Part 519—Certification Regarding Lobbying Certification for Contracts, Grants, Loans,...

  14. 45 CFR Appendix A to Part 1158 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-10-01

    ... 45 Public Welfare 3 2010-10-01 2010-10-01 false Certification Regarding Lobbying A Appendix A to... ARTS AND THE HUMANITIES NATIONAL ENDOWMENT FOR THE ARTS NEW RESTRICTIONS ON LOBBYING Pt. 1158, App. A Appendix A to Part 1158—Certification Regarding Lobbying Certification for Contracts, Grants, Loans,...

  15. 18 CFR Appendix A to Part 1315 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-04-01

    ... Lobbying A Appendix A to Part 1315 Conservation of Power and Water Resources TENNESSEE VALLEY AUTHORITY NEW RESTRICTIONS ON LOBBYING Pt. 1315, App. A Appendix A to Part 1315—Certification Regarding Lobbying... and submit Standard Form-LLL, “Disclosure Form to Report Lobbying,” in accordance with...

  16. 49 CFR Appendix A to Part 20 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 1 2010-10-01 2010-10-01 false Certification Regarding Lobbying A Appendix A to Part 20 Transportation Office of the Secretary of Transportation NEW RESTRICTIONS ON LOBBYING Pt. 20, App. A Appendix A to Part 20—Certification Regarding Lobbying Certification for Contracts,...

  17. 22 CFR Appendix A to Part 311 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-04-01

    ... 22 Foreign Relations 2 2010-04-01 2010-04-01 true Certification Regarding Lobbying A Appendix A to Part 311 Foreign Relations PEACE CORPS NEW RESTRICTIONS ON LOBBYING Pt. 311, App. A Appendix A to Part 311—Certification Regarding Lobbying Certification for Contracts, Grants, Loans, and...

  18. 22 CFR Appendix A to Part 712 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-04-01

    ... 22 Foreign Relations 2 2010-04-01 2010-04-01 true Certification Regarding Lobbying A Appendix A to... RESTRICTIONS ON LOBBYING Pt. 712, App. A Appendix A to Part 712—Certification Regarding Lobbying Certification... and submit Standard Form-LLL, “Disclosure Form to Report Lobbying,” in accordance with...

  19. 22 CFR Appendix A to Part 227 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-04-01

    ... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Certification Regarding Lobbying A Appendix A to Part 227 Foreign Relations AGENCY FOR INTERNATIONAL DEVELOPMENT NEW RESTRICTIONS ON LOBBYING Pt. 227, App. A Appendix A to Part 227—Certification Regarding Lobbying Certification for...

  20. 45 CFR Appendix A to Part 1168 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-10-01

    ... 45 Public Welfare 3 2010-10-01 2010-10-01 false Certification Regarding Lobbying A Appendix A to... ARTS AND THE HUMANITIES NATIONAL ENDOWMENT FOR THE HUMANITIES NEW RESTRICTIONS ON LOBBYING Pt. 1168, App. A Appendix A to Part 1168—Certification Regarding Lobbying Certification for Contracts,...

  1. 45 CFR Appendix A to Part 604 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-10-01

    ... 45 Public Welfare 3 2010-10-01 2010-10-01 false Certification Regarding Lobbying A Appendix A to... NEW RESTRICTIONS ON LOBBYING Pt. 604, App. A Appendix A to Part 604—Certification Regarding Lobbying... and submit Standard Form-LLL, “Disclosure Form to Report Lobbying,” in accordance with...

  2. 14 CFR Appendix A to Part 1271 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 5 2010-01-01 2010-01-01 false Certification Regarding Lobbying A Appendix... ON LOBBYING Pt. 1271, App. A Appendix A to Part 1271—Certification Regarding Lobbying Certification... and submit Standard Form-LLL, “Disclosure Form to Report Lobbying,” in accordance with...

  3. 22 CFR Appendix A to Part 138 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-04-01

    ... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Certification Regarding Lobbying A Appendix A to Part 138 Foreign Relations DEPARTMENT OF STATE MISCELLANEOUS NEW RESTRICTIONS ON LOBBYING Pt. 138, App. A Appendix A to Part 138—Certification Regarding Lobbying Certification for Contracts,...

  4. 20 CFR Appendixes to Subpart C of... - Note

    Science.gov (United States)

    2010-04-01

    ...- ) Computing Primary Insurance Amounts Pt. 404, Subpt. C, Apps., Nt. Appendixes to Subpart C of Part 404—Note The following appendices contain data that are needed in computing primary insurance amounts. Appendix... which we apply to a worker's average indexed monthly earnings to find his or her primary...

  5. 40 CFR Appendix A to Subpart O of... - Regulated Contaminants

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 22 2010-07-01 2010-07-01 false Regulated Contaminants A Appendix A to... Appendix A to Subpart O of Part 141—Regulated Contaminants Contaminant (units) Traditional MCL in mg/L To... Microbiological contaminants: Total Coliform Bacteria MCL: (systems that collect ≥40 samples/month) 5% of...

  6. 40 CFR Appendix V to Part 1039 - [Reserved

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 32 2010-07-01 2010-07-01 false V Appendix V to Part 1039 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR POLLUTION CONTROLS CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Appendix V to Part 1039...

  7. 32 CFR Appendix D to Part 636 - Glossary

    Science.gov (United States)

    2010-07-01

    ... 32 National Defense 4 2010-07-01 2010-07-01 true Glossary D Appendix D to Part 636 National Defense Department of Defense (Continued) DEPARTMENT OF THE ARMY (CONTINUED) LAW ENFORCEMENT AND CRIMINAL...—Glossary In addition to the terms listed in appendix D to part 634 of this subchapter, the following...

  8. Pathways for School Finance in California. Technical Appendix

    Science.gov (United States)

    Rose, Heather; Sonstelie, Jon; Weston, Margaret

    2010-01-01

    This is a technical appendix for the report, "Pathways for School Finance in California" (ED515651). "Pathways for School Finance in California" simulates alternatives to California's current school finance system. This appendix provides more information about the revenues used in those simulations. The first section describes the districts and…

  9. 7 CFR Appendix to Subpart - Imported Fire Ant

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 5 2010-01-01 2010-01-01 false Imported Fire Ant Appendix to Subpart Agriculture..., DEPARTMENT OF AGRICULTURE DOMESTIC QUARANTINE NOTICES Imported Fire Ant Quarantine and Regulations Costs and charges. Pt. 301, Subpt., App. Appendix to Subpart—Imported Fire Ant III. Regulatory Procedures...

  10. 49 CFR Appendix F to Part 222 - Diagnostic Team Considerations

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Diagnostic Team Considerations F Appendix F to.... 222, App. F Appendix F to Part 222—Diagnostic Team Considerations For purposes of this part, a diagnostic team is a group of knowledgeable representatives of parties of interest in a highway-rail...

  11. 34 CFR Appendix A to Part 300 - Excess Costs Calculation

    Science.gov (United States)

    2010-07-01

    ... 34 Education 2 2010-07-01 2010-07-01 false Excess Costs Calculation A Appendix A to Part 300 Education Regulations of the Offices of the Department of Education (Continued) OFFICE OF SPECIAL EDUCATION... CHILDREN WITH DISABILITIES Pt. 300, App. A Appendix A to Part 300—Excess Costs Calculation Except...

  12. 34 CFR Appendix B to Part 300 - Proportionate Share Calculation

    Science.gov (United States)

    2010-07-01

    ... 34 Education 2 2010-07-01 2010-07-01 false Proportionate Share Calculation B Appendix B to Part... CHILDREN WITH DISABILITIES Pt. 300, App. B Appendix B to Part 300—Proportionate Share Calculation Each LEA... early intervening activities in § 300.226). The following outlines the calculations for the example...

  13. 14 CFR Appendix C to Part 420 - Risk Analysis

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 4 2010-01-01 2010-01-01 false Risk Analysis C Appendix C to Part 420... TRANSPORTATION LICENSING LICENSE TO OPERATE A LAUNCH SITE Pt. 420, App. C Appendix C to Part 420—Risk Analysis (a... risk is minimal. (2) An applicant shall perform a risk analysis when a populated area is located...

  14. 32 CFR Appendix C to Part 45 - DD Form 215

    Science.gov (United States)

    2010-07-01

    ... 32 National Defense 1 2010-07-01 2010-07-01 false DD Form 215 C Appendix C to Part 45 National... CERTIFICATE OF RELEASE OR DISCHARGE FROM ACTIVE DUTY (DD FORM 214/5 SERIES) Pt. 45, App. C Appendix C to Part 45—DD Form 215 EC21OC91.050...

  15. 32 CFR Appendix B to Part 275 - Obtaining Customer Authorization

    Science.gov (United States)

    2010-07-01

    ... required by 32 CFR part 310 for a personnel security investigation. C. Any customer's authorization not... 32 National Defense 2 2010-07-01 2010-07-01 false Obtaining Customer Authorization B Appendix B to... OF 1978 Pt. 275, App. B Appendix B to Part 275—Obtaining Customer Authorization A. A DoD...

  16. 32 CFR Appendix to Part 277 - Program Fraud Civil Remedies

    Science.gov (United States)

    2010-07-01

    ... officer; g. That the contents of discovery or evidence be sealed; h. That the defendant comply with 32 CFR... 32 National Defense 2 2010-07-01 2010-07-01 false Program Fraud Civil Remedies Appendix to Part...) MISCELLANEOUS IMPLEMENTATION OF THE PROGRAM FRAUD CIVIL REMEDIES ACT Pt. 277, App. Appendix to Part...

  17. 10 CFR Appendix D to Part 835 - Surface Contamination Values

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 4 2010-01-01 2010-01-01 false Surface Contamination Values D Appendix D to Part 835...—Surface Contamination Values The data presented in appendix D are to be used in identifying the need for....1102. Surface Contamination Values 1 in dpm/100 cm 2 Radionuclide Removable 2,4 Total...

  18. 31 CFR Appendix to Part 341 - Tables of Redemption Values

    Science.gov (United States)

    2010-07-01

    ... 31 Money and Finance: Treasury 2 2010-07-01 2010-07-01 false Tables of Redemption Values Appendix... RETIREMENT PLAN BONDS Pt. 341, App. Appendix to Part 341—Tables of Redemption Values Table of Redemption Values Providing an Investment Yield of 33/4 Percent per Annum for Bonds Bearing Issue Dates...

  19. 40 CFR Appendix C to Part 67 - Computer Program

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 15 2010-07-01 2010-07-01 false Computer Program C Appendix C to Part 67 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) EPA APPROVAL OF STATE NONCOMPLIANCE PENALTY PROGRAM Pt. 67, App. C Appendix C to Part 67—Computer Program...

  20. 49 CFR Appendix F to Part 512 - OMB Clearance

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 6 2010-10-01 2010-10-01 false OMB Clearance F Appendix F to Part 512 Transportation Other Regulations Relating to Transportation (Continued) NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION CONFIDENTIAL BUSINESS INFORMATION Pt. 512, App. F Appendix F to Part 512—OMB Clearance The OMB clearance...

  1. 32 CFR Appendix C to Part 282 - Submitting a Claim

    Science.gov (United States)

    2010-07-01

    ... 32 National Defense 2 2010-07-01 2010-07-01 false Submitting a Claim C Appendix C to Part 282.... 282, App. C Appendix C to Part 282—Submitting a Claim (a) Who May Submit a Claim. Any person (“claimant”) may submit a claim who has a demand for money or property against the Government under 31...

  2. 6 CFR Appendix A to Part 9 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-01-01

    ... 6 Domestic Security 1 2010-01-01 2010-01-01 false Certification Regarding Lobbying A Appendix A to Part 9 Domestic Security DEPARTMENT OF HOMELAND SECURITY, OFFICE OF THE SECRETARY RESTRICTIONS UPON LOBBYING Pt. 9, App. A Appendix A to Part 9—Certification Regarding Lobbying Certification for...

  3. 32 CFR Appendix I to Part 154 - Overseas Investigations

    Science.gov (United States)

    2010-07-01

    ... PERSONNEL SECURITY PROGRAM REGULATION Pt. 154, App. I Appendix I to Part 154—Overseas Investigations 1. Purpose The purpose of this appendix is to establish, within the framework of this part, 32 CFR part 361... investigative agencies, when acting for DIS overseas in accordance with 32 CFR part 361 may, with...

  4. 17 CFR Appendix B to Part 160 - Sample Clauses

    Science.gov (United States)

    2010-04-01

    ... FINANCIAL INFORMATION Pt. 160, App. B Appendix B to Part 160—Sample Clauses This appendix only applies to... out of disclosures to nonaffiliated third parties, you may . A-7—Confidentiality and Security (All... policies and practices with respect to protecting the confidentiality and security of nonpublic...

  5. 40 CFR Appendix A to Subpart C of... - References

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 5 2010-07-01 2010-07-01 false References A Appendix A to Subpart C of...) AMBIENT AIR MONITORING REFERENCE AND EQUIVALENT METHODS Procedures for Determining Comparability Between Candidate Methods and Reference Methods Pt. 53, Subpt. C, App. A Appendix A to Subpart C of Part...

  6. 32 CFR Appendix A to Part 806 - References

    Science.gov (United States)

    2010-07-01

    ... Proposals Title 48, Code of Federal Regulations (CFR), Federal Acquisition Regulations (FAR) System OMB... 32 National Defense 6 2010-07-01 2010-07-01 false References A Appendix A to Part 806 National... INFORMATION ACT PROGRAM Pt. 806, App. A Appendix A to Part 806—References Title 5, United States Code,...

  7. 40 CFR Appendix A to Subpart A of... - References

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 5 2010-07-01 2010-07-01 false References A Appendix A to Subpart A of...) AMBIENT AIR MONITORING REFERENCE AND EQUIVALENT METHODS General Provisions Pt. 53, Subpt. A, App. A Appendix A to Subpart A of Part 53—References (1) American National Standard Quality Systems—Model...

  8. 10 CFR Appendix B to Part 600 - Audit Report Distributees

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 4 2010-01-01 2010-01-01 false Audit Report Distributees B Appendix B to Part 600 Energy DEPARTMENT OF ENERGY (CONTINUED) ASSISTANCE REGULATIONS FINANCIAL ASSISTANCE RULES Pt. 600, App. B Appendix B to Part 600—Audit Report Distributees Distributee: Manager, Eastern Region, Office of...

  9. 12 CFR Appendix F to Part 360 - Customer File Structure

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 4 2010-01-01 2010-01-01 false Customer File Structure F Appendix F to Part... POLICY RESOLUTION AND RECEIVERSHIP RULES Pt. 360, App. F Appendix F to Part 360—Customer File Structure This is the structure of the data file to provide to the FDIC information related to each customer...

  10. Significance of acquired diverticular disease of the vermiform appendix

    DEFF Research Database (Denmark)

    Kallenbach, Klaus; Hjorth, Sofie Vetli; Engel, Ulla;

    2012-01-01

    To assess the prevalence of acquired diverticulum of the appendix (DA), including incipient forms and its possible significance as a marker of local/regional neoplasms.......To assess the prevalence of acquired diverticulum of the appendix (DA), including incipient forms and its possible significance as a marker of local/regional neoplasms....

  11. 46 CFR 54.15-3 - Definitions (modifies Appendix 3).

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 2 2010-10-01 2010-10-01 false Definitions (modifies Appendix 3). 54.15-3 Section 54.15-3 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE ENGINEERING PRESSURE VESSELS Pressure-Relief Devices § 54.15-3 Definitions (modifies Appendix 3). (a) Definitions applicable...

  12. 12 CFR Appendix B to Part 363 - Illustrative Management Reports

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 4 2010-01-01 2010-01-01 false Illustrative Management Reports B Appendix B to Part 363 Banks and Banking FEDERAL DEPOSIT INSURANCE CORPORATION REGULATIONS AND STATEMENTS OF GENERAL POLICY ANNUAL INDEPENDENT AUDITS AND REPORTING REQUIREMENTS Pt. 363, App. B Appendix B to Part 363—Illustrative Management Reports Table...

  13. 14 CFR Appendix B to Part 147 - General Curriculum Subjects

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false General Curriculum Subjects B Appendix B to... to Part 147—General Curriculum Subjects This appendix lists the subjects required in at least 400 hours in general curriculum subjects. The number in parentheses before each item listed under...

  14. 14 CFR Appendix A to Part 147 - Curriculum Requirements

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Curriculum Requirements A Appendix A to... to Part 147—Curriculum Requirements This appendix defines terms used in appendices B, C, and D of this part, and describes the levels of proficiency at which items under each subject in each...

  15. 40 CFR Appendix II to Part 86 - Temperature Schedules

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 19 2010-07-01 2010-07-01 false Temperature Schedules II Appendix II... Appendix II to Part 86—Temperature Schedules (a) Ambient temperature cycle for the diurnal emission portion of the evaporative emission test (see § 86.133). Table I—Temperature Versus Time Sequence Use...

  16. 31 CFR Appendix to Part 19 - Covered Transactions

    Science.gov (United States)

    2010-07-01

    ... 31 Money and Finance: Treasury 1 2010-07-01 2010-07-01 false Covered Transactions Appendix to Part 19 Money and Finance: Treasury Office of the Secretary of the Treasury GOVERNMENTWIDE DEBARMENT AND SUSPENSION (NONPROCUREMENT) Pt. 19, App. Appendix to Part 19—Covered Transactions ER26NO03.000...

  17. 46 CFR Appendix IV to Part 150 - Data Sheet

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 5 2010-10-01 2010-10-01 false Data Sheet IV Appendix IV to Part 150 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) CERTAIN BULK DANGEROUS CARGOES COMPATIBILITY OF CARGOES Pt. 150, App. IV Appendix IV to Part 150—Data Sheet EC02FE91.080 EC02FE91.081...

  18. 34 CFR Appendix to Part 85 - Covered Transactions

    Science.gov (United States)

    2010-07-01

    ... 34 Education 1 2010-07-01 2010-07-01 false Covered Transactions Appendix to Part 85 Education Office of the Secretary, Department of Education GOVERNMENTWIDE DEBARMENT AND SUSPENSION (NONPROCUREMENT) Pt. 85, App. Appendix to Part 85—Covered Transactions ER26NO03.001...

  19. 21 CFR Appendix to Part 1404 - Covered Transactions

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 9 2010-04-01 2010-04-01 false Covered Transactions Appendix to Part 1404 Food and Drugs OFFICE OF NATIONAL DRUG CONTROL POLICY GOVERNMENTWIDE DEBARMENT AND SUSPENSION (NONPROCUREMENT) Pt. 1404, App. Appendix to Part 1404—Covered Transactions ER26NO03.000...

  20. 14 CFR Appendix H to Part 121 - Advanced Simulation

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Advanced Simulation H Appendix H to Part... Simulation This appendix provides guidelines and a means for achieving flightcrew training in advanced... simulator, as appropriate. Advanced Simulation Training Program For an operator to conduct Level C or...

  1. 48 CFR Appendix to Part 1252 - Tar Matrix

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 5 2010-10-01 2010-10-01 false Tar Matrix Appendix to Part 1252 Federal Acquisition Regulations System DEPARTMENT OF TRANSPORTATION CLAUSES AND FORMS SOLICITATION PROVISIONS AND CONTRACT CLAUSES Pt. 1252, App. Appendix to Part 1252—Tar Matrix...

  2. 32 CFR Appendix A to Part 505 - References

    Science.gov (United States)

    2010-07-01

    ... 32 National Defense 3 2010-07-01 2010-07-01 true References A Appendix A to Part 505 National Defense Department of Defense (Continued) DEPARTMENT OF THE ARMY AID OF CIVIL AUTHORITIES AND PUBLIC RELATIONS ARMY PRIVACY ACT PROGRAM Pt. 505, App. A Appendix A to Part 505—References (a) The Privacy Act...

  3. 32 CFR Appendix A to Part 516 - References

    Science.gov (United States)

    2010-07-01

    ... 32 National Defense 3 2010-07-01 2010-07-01 true References A Appendix A to Part 516 National Defense Department of Defense (Continued) DEPARTMENT OF THE ARMY AID OF CIVIL AUTHORITIES AND PUBLIC RELATIONS LITIGATION Pt. 516, App. A Appendix A to Part 516—References Publications referenced in this...

  4. 32 CFR Appendix E to Part 505 - Litigation Status Sheet

    Science.gov (United States)

    2010-07-01

    ... 32 National Defense 3 2010-07-01 2010-07-01 true Litigation Status Sheet E Appendix E to Part 505 National Defense Department of Defense (Continued) DEPARTMENT OF THE ARMY AID OF CIVIL AUTHORITIES AND PUBLIC RELATIONS ARMY PRIVACY ACT PROGRAM Pt. 505, App. E Appendix E to Part 505—Litigation Status...

  5. 32 CFR Appendix A to Part 513 - References

    Science.gov (United States)

    2010-07-01

    ... 32 National Defense 3 2010-07-01 2010-07-01 true References A Appendix A to Part 513 National Defense Department of Defense (Continued) DEPARTMENT OF THE ARMY AID OF CIVIL AUTHORITIES AND PUBLIC RELATIONS INDEBTEDNESS OF MILITARY PERSONNEL Pt. 513, App. A Appendix A to Part 513—References Section...

  6. 32 CFR Appendix B to Part 516 - Mailing Addresses

    Science.gov (United States)

    2010-07-01

    ... 32 National Defense 3 2010-07-01 2010-07-01 true Mailing Addresses B Appendix B to Part 516 National Defense Department of Defense (Continued) DEPARTMENT OF THE ARMY AID OF CIVIL AUTHORITIES AND PUBLIC RELATIONS LITIGATION Pt. 516, App. B Appendix B to Part 516—Mailing Addresses The following is...

  7. 49 CFR Appendix B to Part 194 - High Volume Areas

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 3 2010-10-01 2010-10-01 false High Volume Areas B Appendix B to Part 194... Pt. 194, App. B Appendix B to Part 194—High Volume Areas As of January 5, 1993 the following areas are high volume areas: Major rivers Nearest town and state Arkansas River N. Little Rock, AR....

  8. VistA 4 Product Roadmap

    Data.gov (United States)

    Department of Veterans Affairs — The VistA 4 Product Roadmap outlines how the Department of Veterans Affairs (VA), under the direction of the VistA Evolution Program, will build upon the previous...

  9. 45 CFR Appendix F to Part 1355 - Appendix F to Part 1355

    Science.gov (United States)

    2010-10-01

    ... Public Welfare Regulations Relating to Public Welfare (Continued) OFFICE OF HUMAN DEVELOPMENT SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES THE ADMINISTRATION ON CHILDREN, YOUTH AND FAMILIES, FOSTER CARE MAINTENANCE PAYMENTS, ADOPTION ASSISTANCE, AND CHILD AND FAMILY SERVICES GENERAL Pt. 1355, App. F Appendix...

  10. 44 CFR Appendix A(5) to Part 61 - Appendix A(5) to Part 61

    Science.gov (United States)

    2010-10-01

    ... notice sent to you in conjunction with the community inspection procedure established under 44 CFR 59.30... procedure set forth in National Flood Insurance Program Regulations (44 CFR 59.30). During the several years... 44 Emergency Management and Assistance 1 2010-10-01 2010-10-01 false Appendix A(5) to Part 61...

  11. 44 CFR Appendix A(6) to Part 61 - Appendix A(6) to Part 61

    Science.gov (United States)

    2010-10-01

    ... established under 44 CFR 59.30. c. If the property listed on the application is not otherwise eligible for... an inspection procedure set forth in National Flood Insurance Program Regulations (44 CFR 59.30... 44 Emergency Management and Assistance 1 2010-10-01 2010-10-01 false Appendix A(6) to Part 61...

  12. Improved electrical efficiency and bottom ash quality on waste combustion plants. Appendix A4 to A6

    Energy Technology Data Exchange (ETDEWEB)

    Kloeft, H.; Jensen, Peter A.; Nesterov, I.; Hyks, J.; Astrup, T. (Technical Univ. of Denmark, Kgs. Lyngby (Denmark)); Mogensen, Erhardt (Babcock and Wilcox Voelund A/S, Glostrup (Denmark))

    2010-07-01

    Investigations making it possible to evaluate and further develop concepts to improve electrical efficiency in a waste combustion plant were performed. Furthermore, one objective of the study was to investigate the possibilities of improving waste bottom ash leaching properties by use of a rotary kiln treatment. The project work included construction of a bench-scale rotary kiln, performing ash rotary kiln treatment experiments, conducting gas suction probe measurements on a waste incineration plant and making some concept evaluations. The influence of the rotary kiln thermal treatment on the leaching of Ca, Al, Si, Mg, Ba, Sr, Cl, Cu, Pb, Zn, Cr, Mo, sulfate, DOC and carbonate was determined. As a result of these tests, the rotary kiln thermal treatment of bottom ashes can be recommended for reducing the leaching of Cu, Pb, Cl, Zn and DOC; however, an increased leaching of Cr and Mo should be expected. The combustion conditions above the grate of a waste incineration plant were investigated and the release and concentration of volatile ash species in the flue gas such as Cl, Na, K, Ca, Pb, Zn and S were measured. The conducted measurements show that flue gas from grate sections 3 and 4 can produce a sufficiently hot flue gas that contains only low concentrations of corrosive species, and therefore can be used to increase superheater temperatures. Implementation of the so-called flue gas split concept together with other steam circle modifications on a waste combustion plant, and using a reasonable increase in final steam temperature from 400 to 500 deg. C, have the potential to increase electrical efficiency from 24 to 30% (with respect to lower fuel heating value) in a waste combustion plant. The appendices deal with collection of slags for the rotary kiln experiments; overview of the thermal treatment experiments - phase 1; a journal paper with the title ''Quantification of leaching from waste incineration bottom ash treated in a rotary kiln''. (Author)

  13. [Carcinoid of the appendix. A case report].

    Science.gov (United States)

    Spallitta, S I; Termine, G; Stella, M; Calistro, V; Marozzi, P

    2000-01-01

    A case of a young male operated on for acute appendicitis due to a carcinoid of the base is reported. Since the tumor was infiltrating the resection margin of the appendix, the patient was later treated with a right hemicolectomy. Carcinoid tumor is unusual, but can be encountered several times during the career of a surgeon (1/200-300 appendicectomy). The tumor is more frequent in women (2-4:1), located at the tip of the appendix (62-78%) and has a diameter less than 1 cm in 70-95% of cases. It is more frequently diagnosed incidentally after an operation for acute appendicitis and occasionally during other procedures (colectomy, cholecystectomy, salpingectomy). Liver metastases are rare ( 2 cm) and can cause a "carcinoid syndrome": flush, diarrhea bronchoconstriction, cardiac valve disease. Diagnosis is made by the pathologist and staging by conventional radiologic procedures (TAC, US), dosage of neuroendocrine mediators such as 24 hours urinary 5-HIAA. Nowadays 111In-octreotide scintigraphy (SRS) has an 86% sensitivity to detect the carcinoid and is useful for staging and for planning a surgical intervention. Simple appendectomy is adequate treatment for appendiceal carcinoids less than 1 cm in diameter. Adequate treatment for tumors greater than 2 cm is right hemicolectomy. A point of controversy is what to do for tumors in the 1 to 2 cm range. It seems that appendectomy alone is sufficient except in those cases when mesoappendiceal invasion is identified. When surgical margins after appendectomy are not free of tumor, additional surgery seems warranted. Carcinoid tumor of the appendix has a good prognosis with a 5-year-survival rate, of 85.9-100%. When liver metastases are encountered octreotide can relieve symptoms and sometimes the progression of the disease. PMID:10832290

  14. Vietnam; Selected Issues and Statistical Appendix

    OpenAIRE

    International Monetary Fund

    2002-01-01

    This Selected Issues paper and Statistical Appendix reviews the factors behind developments in government revenue in Vietnam during 1996–2000. This period encompasses Vietnam’s continued transition to a market-based economy, the Asian financial crisis in 1997, and, toward the end, high world oil prices, which have led to both temporary and permanent changes in the revenue base. The paper discusses developments in foreign currency deposits (FCDs) as a proxy for dollarization. It also revie...

  15. Lengths and Positions of the Vermiform Appendix among Sudanese Cadavers

    Directory of Open Access Journals (Sweden)

    Ehab I. El-Amin

    2015-08-01

    Full Text Available Background/objective: The anatomy of vermiform appendix displays great variations in length and position between different populations. The reports relating these variations to a specific etiological factor are few. This study aims to describe the positions and lengths of vermiform appendix among Sudanese cadavers. Methods: This descriptive study was carried out in Omdurman Teaching Hospital Morgue and Omdurman Islamic University-Sudan. Sixty Sudanese cadavers (30 male and 30 female, were dissected in the period from June 2013 to June 2014. The positions and the lengths of vermiform appendix were measured in millimeters. The data was analyzed by SPSS version 20. Results: The cadavers’ age ranged between 20 to 80 years according to their medico-legal reports. Retrocaecal position was mainly observed in 60%, pelvic in 35%, post-ileal in 3.3%, and pre-ileal in 1.7%. The lengths of the appendix was found < 69 mm in 23.3%, 70-110 mm in 60%, and > 110 mm in 16.7%, also the study showed insignificant difference between the lengths and ages (p < 0.08, and between males and females (p = 0.23. Age was the influencing factor for the positions of vermiform appendixes (p = 0.04. Conclusion: The study showed that the commonest lengths of the appendix were 70-110 mm while the common position was retrocaecal regardless to age or gender. This data should be considered in surgical removal of the inflamed appendix.

  16. [Perforation of the appendix and observation of Enterobius vermicularis].

    Science.gov (United States)

    Schou-Jensen, Katrine; Antipina, Elena Nikolaevna; Brisling, Steffen Kirstein; Azawi, Nessn

    2014-12-15

    A nine-year-old girl was admitted to the paediatric ward due to fever and lower abdomen pain through a day. Acute laparoscopic exploration showed a large necrotic perforation at the distal end of the appendix. During the appendectomy multiple small, live Enterobius vermicularis (pinworms) were observed. The patient was admitted for three days of observation and received relevant treatment with intravenous antibiotics and antihelminthic treatment. The histology showed numerous pinworms in the lumen of the appendix and invasion of the pinworms of the submucosal layer and the wall of the appendix. PMID:25534223

  17. 22 CFR Appendix I to Part 211 - Operational Plan

    Science.gov (United States)

    2010-04-01

    ... DISASTER RELIEF, ECONOMIC DEVELOPMENT AND OTHER ASSISTANCE Pt. 211, App. I Appendix I to Part 211...) and (b), will be met. 5. Logistics. Provide a logistics plan that demonstrates the adequacy...

  18. 49 CFR Appendix B to Part 236 - Risk Assessment Criteria

    Science.gov (United States)

    2010-10-01

    ..., MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCES Pt. 236, App. B Appendix... considered: (1) Track plan infrastructure, switches, rail crossings at grade and highway-rail grade...

  19. 49 CFR Appendix A to Part 220 - Recommended Phonetic Alphabet

    Science.gov (United States)

    2010-10-01

    ... appendix A of part 220 does not exist in 49 CFR parts 200 to 399, revised as of Oct. 1, 1997. ... 49 Transportation 4 2010-10-01 2010-10-01 false Recommended Phonetic Alphabet A Appendix A to Part...—Recommended Phonetic Alphabet A—ALFA B—BRAVO C—CHARLIE D—DELTA E—ECHO F—FOXTROT G—GOLF H—HOTEL I—INDIA...

  20. 32 CFR Appendix A to Part 45 - DD Form 214

    Science.gov (United States)

    2010-07-01

    ... 32 National Defense 1 2010-07-01 2010-07-01 false DD Form 214 A Appendix A to Part 45 National... CERTIFICATE OF RELEASE OR DISCHARGE FROM ACTIVE DUTY (DD FORM 214/5 SERIES) Pt. 45, App. A Appendix A to Part 45—DD Form 214 EC23OC91.003 EC23OC91.004 EC23OC91.005 EC23OC91.006...

  1. 43 CFR Appendix B to Part 2 - Internet Addresses

    Science.gov (United States)

    2010-10-01

    ... Regulations (43 CFR, Part 2, Subparts A and B): http://www.doi.gov/foia/foiaregs.html 7. DOI FOIA Policy and... 43 Public Lands: Interior 1 2010-10-01 2010-10-01 false Internet Addresses B Appendix B to Part 2... INFORMATION ACT Pt. 2, App. B Appendix B to Part 2—Internet Addresses 1. Department of the Interior (DOI)...

  2. Visualization of the normal appendix with MR enterography in children

    International Nuclear Information System (INIS)

    Magnetic resonance (MR) imaging may provide a radiation-sparing alternative to CT in diagnosing appendicitis in children in whom US is equivocal. However, comparability with CT in the detection of the appendix remains to be established. To determine the detection rate of the normal appendix in children on oral and IV contrast-enhanced MRI. MR imaging of 58 patients who had previously undergone MR enterography was retrospectively reviewed. Detection rate, body mass index, age and gender were recorded. The normal appendix was detected in 28 cases (48 %), with greatest detection rate on the axial fast imaging employing steady-state acquisition (FIESTA) sequence. Children in whom the appendix was detected had significantly higher BMI compared to children in whom the appendix was not seen. Neither age nor gender demonstrated a significant association with detection rate. The detection rate of the normal appendix in children on oral and IV contrast-enhanced MRI was 48 %, which is comparable to detection rates on CT, as well as to previously reported detection rates on MR imaging with neither oral nor IV contrast agents. These findings may serve to guide the development of MRI protocols for pediatric appendicitis. (orig.)

  3. Visualization of the normal appendix with MR enterography in children

    Energy Technology Data Exchange (ETDEWEB)

    Kovanlikaya, Arzu; Rosenbaum, Daniel; Brill, Paula W. [Weill Cornell Medical College, New York Presbyterian Hospital, Department of Radiology, New York, NY (United States); Mazumdar, Madhu; Dunning, Allison [Division of Biostatistics and Epidemiology, Weill Cornell Medical College, Department of Public Health, New York, NY (United States)

    2012-08-15

    Magnetic resonance (MR) imaging may provide a radiation-sparing alternative to CT in diagnosing appendicitis in children in whom US is equivocal. However, comparability with CT in the detection of the appendix remains to be established. To determine the detection rate of the normal appendix in children on oral and IV contrast-enhanced MRI. MR imaging of 58 patients who had previously undergone MR enterography was retrospectively reviewed. Detection rate, body mass index, age and gender were recorded. The normal appendix was detected in 28 cases (48 %), with greatest detection rate on the axial fast imaging employing steady-state acquisition (FIESTA) sequence. Children in whom the appendix was detected had significantly higher BMI compared to children in whom the appendix was not seen. Neither age nor gender demonstrated a significant association with detection rate. The detection rate of the normal appendix in children on oral and IV contrast-enhanced MRI was 48 %, which is comparable to detection rates on CT, as well as to previously reported detection rates on MR imaging with neither oral nor IV contrast agents. These findings may serve to guide the development of MRI protocols for pediatric appendicitis. (orig.)

  4. Appendix: proof of the Uniformity Conjecture

    CERN Document Server

    Baldassarri, Francesco

    2011-01-01

    This paper originated as an appendix to the paper "Topology and Geometry of the Berkovich Ramification Locus for Rational Functions, II" by Xander Faber arXiv:1104.0943v2 [math.NT]. It may however be read independently. We prove a variant of the p-adic Rolle theorem, via the theory of the radius of convergence of p-adic connections and the theory of semistable reduction of p-adic curves. We carefully compare the present author's notion [Inv. Math. 182 (2010)] of radius of convergence, of a connection on a p-adic curve X, normalized by the choice of a semistable model of X, with Kedlaya's intrinsic generic radius of convergence of a differential module [Def. 9.4.7 in p-adic Differential Equations, Cambridge Studies in Adv. Math., vol. 125 (2010)].

  5. 50 CFR 23.90 - What are the criteria for listing species in Appendix III?

    Science.gov (United States)

    2010-10-01

    ... ENDANGERED SPECIES OF WILD FAUNA AND FLORA (CITES) Lists of Species § 23.90 What are the criteria for listing... concern. (g) Transferring a species from Appendix III to Appendix I or II. If, after monitoring the...

  6. Descriptions of reference LWR facilities for analysis of nuclear fuel cycles. Appendixes

    International Nuclear Information System (INIS)

    The appendixes present the calculations that were used to derive the release factors discussed for each fuel cycle facility in Volume I. Appendix A presents release factor calculations for a surface mine, underground mine, milling facility, conversion facility, diffusion enrichment facility, fuel fabrication facility, PWR, BWR, and reprocessing facility. Appendix B contains additional release factors calculated for a BWR, PWR, and a reprocessing facility. Appendix C presents release factors for a UO2 fuel fabrication facility

  7. 29 CFR Appendix B to Subpart Y of... - Guidelines for Scientific Diving

    Science.gov (United States)

    2010-07-01

    ... 29 Labor 8 2010-07-01 2010-07-01 false Guidelines for Scientific Diving B Appendix B to Subpart Y..., Subpt. Y, App. B Appendix B to Subpart Y of Part 1926—Guidelines for Scientific Diving Note: The requirements applicable to construction work under this appendix B are identical to those set forth at...

  8. 29 CFR Appendix D to Subpart P of... - Aluminum Hydraulic Shoring for Trenches

    Science.gov (United States)

    2010-07-01

    ... 29 Labor 8 2010-07-01 2010-07-01 false Aluminum Hydraulic Shoring for Trenches D Appendix D to.... 1926, Subpt. P, App. D Appendix D to Subpart P of Part 1926—Aluminum Hydraulic Shoring for Trenches (a) Scope. This appendix contains information that can be used when aluminum hydraulic shoring is...

  9. 40 CFR Appendix W to Part 51 - Guideline on Air Quality Models

    Science.gov (United States)

    2010-07-01

    ... Appendix A meet these conditions: i. The model must be written in a common programming language, and the... on the current status of modeling guidance can always be obtained from EPA's Regional Offices. Table....0Bibliography 12.0References Appendix A to Appendix W of 40 CFR Part 51—Summaries of Preferred Air...

  10. 34 CFR Appendix A to Subpart N of... - Sample Default Prevention Plan

    Science.gov (United States)

    2010-07-01

    ... 34 Education 3 2010-07-01 2010-07-01 false Sample Default Prevention Plan A Appendix A to Subpart... Default Rates Pt. 668, Subpt. N, App. A Appendix A to Subpart N of Part 668—Sample Default Prevention Plan This appendix is provided as a sample plan for those institutions developing a default prevention...

  11. Adult Education Literacy Instruction. Appendix: Tables of Studies Included in the Review

    Science.gov (United States)

    National Institute for Literacy, 2010

    2010-01-01

    Included here are two appendixes to "Adult Education Literacy Instruction: A Review of the Research." Appendix A, "Adult Studies," contains: (1) Assessment Profiles; (2) Alphabetics; (3) Fluency; (4) Vocabulary; and (5) Comprehension. Appendix B, "Adolescent Studies," contains: (1) Alphabetics; (2) Fluency; (3) Vocabulary; and (4) Comprehension.…

  12. 12 CFR Appendix G to Part 225 - Capital Adequacy Guidelines for Bank Holding Companies: Internal-Ratings-Based and Advanced...

    Science.gov (United States)

    2010-01-01

    ... company that uses 12 CFR part 225, appendix G, to calculate its risk-based capital requirements. (2) Any... (FFIEC) 009 Country Exposure Report); (iii) Is a subsidiary of a depository institution that uses 12 CFR part 3, appendix C, 12 CFR part 208, appendix F, 12 CFR part 325, appendix D, or 12 CFR part...

  13. MR imaging of the normal appendix in children

    International Nuclear Information System (INIS)

    Our objective was to assess the ability of MR imaging in the detection of the normal appendix, and to describe the MR appearance of the normal appendix. There were 15 healthy volunteers (11 girls, 4 boys; mean age 12.3 years) who underwent MR imaging on a 1.0-T unit. The imaging protocol included axial and coronal T2-weighted ultra turbo spin-echo (UTSE)-weighted images, axial T1-weighted turbo spin-echo (TSE) and coronal short tau inversion recovery (STIR)/TSE sequences. Confidence regarding the detection was scored from 1 (high confidence) to 3 (low confidence). Thickness was measured and MR appearance described. Clinical control after 2 weeks revealed no signs or symptoms of acute appendicitis. The normal appendix was seen in 86% on T2/UTSE-weighted images and in 73% on T1/TSE-weighted images and in none on STIR/TSE images. On axial T2/UTSE-weighted images, normal appendix had a hyperintense center and a hypointense wall, and was mostly hypointense on T1/TSE-weighted images, with a mean thickness of 4.5 mm. Magnetic resonance imaging seems to be an accurate method for the assessment of the normal appendix in children; thus, MR imaging might be an alternative to CT if US examinations are inconclusive. (orig.)

  14. Preliminary Systems Design Study assessment report. Volume 8, Appendixes

    Energy Technology Data Exchange (ETDEWEB)

    Mayberry, J.L.; Feizollahi, F.; Del Signore, J.C.

    1992-01-01

    The System Design Study (SDS), part of the Waste Technology Development Department at the Idaho National Engineering Laboratory (INEL), examined techniques available for the remediation of hazardous and transuranic waste stored at the Radioactive Waste Management Complex`s Subsurface Disposal Area at the INEL. Using specific technologies, system concepts for treating the buried waste and the surrounding contaminated soil were evaluated. Evaluation included implementability, effectiveness, and cost. The SDS resulted in the development of technology requirements including demonstration, testing, and evaluation activities needed for implementing each concept. This volume of the Systems Design Study contain four Appendixes that were part of the study. Appendix A is an EG&G Idaho, Inc., report that represents a review and compilation of previous reports describing the wastes and quantities disposed in the Subsurface Disposal Area of the Idaho National Engineering Laboratory. Appendix B contains the process flowsheets considered in this study, but not selected for detailed analysis. Appendix C is a historical tabulation of radioactive waste incinerators. Appendix D lists Department of Energy facilities where cementation stabilization systems have been used.

  15. Highly directive and Gaussian far-field emission from “giant” photonic trumpets

    DEFF Research Database (Denmark)

    Stepanov, Petr; Delga, Adrien; Gregersen, Niels;

    2015-01-01

    Photonic trumpets are broadband dielectric antennas that efficiently funnel the emission of a pointlike quantum emitter—such as a semiconductor quantum dot—into a Gaussian free-space beam. After describing guidelines for the taper design, we present a “giant” photonic trumpet. The device features a...

  16. Far-Field Accumulation of Fissile Material From Waste Packages Containing Plutonium Disposition Waste Form

    International Nuclear Information System (INIS)

    The objective of this calculation is to estimate the quantity of fissile material that could accumulate in fractures in the rock beneath plutonium-ceramic (Pu-ceramic) and Mixed-Oxide (MOX) waste packages (WPs) as they degrade in the potential monitored geologic repository at Yucca Mountain. This calculation is to feed another calculation (Ref. 31) computing the probability of criticality in the systems described in Section 6 and then ultimately to a more general report on the impact of plutonium on the performance of the proposed repository (Ref. 32), both developed concurrently to this work. This calculation is done in accordance with the development plan TDP-DDC-MD-000001 (Ref. 9), item 5. The original document described in item 5 has been split into two documents: this calculation and Ref. 4. The scope of the calculation is limited to only very low flow rates because they lead to the most conservative cases for Pu accumulation and more generally are consistent with the way the effluent from the WP (called source term in this calculation) was calculated (Ref. 4). Ref. 4 (''In-Drift Accumulation of Fissile Material from WPs Containing Plutonium Disposition Waste Forms'') details the evolution through time (breach time is initial time) of the chemical composition of the solution inside the WP as degradation of the fuel and other materials proceed. It is the chemical solution used as a source term in this calculation. Ref. 4 takes that same source term and reacts it with the invert; this calculation reacts it with the rock. In addition to reactions with the rock minerals (that release Si and Ca), the basic mechanisms for actinide precipitation are dilution and mixing with resident water as explained in Section 2.1.4. No other potential mechanism such as flow through a reducing zone is investigated in this calculation. No attempt was made to use the effluent water from the bottom of the invert instead of using directly the effluent water from the WP. This calculation supports disposal criticality analysis and has been prepared in accordance with AP-3.12Q, Calculations (Ref. 49). This calculation uses results from Ref. 4 on actinide accumulation in the invert and more generally does reference heavily the cited calculation. In addition to the information provided in this calculation, the reader is referred to the cited calculation for a more thorough treatment of items applying to both the invert and fracture system such as the choice of the thermodynamic database, the composition of J-13 well water, tuff composition, dissolution rate laws, Pu(OH)4 solubility and also for details on the source term composition. The flow conditions (seepage rate, water velocity in fractures) in the drift and the fracture system beneath initially referred to the TSPA-VA because this work was prepared before the release of the work feeding the TSPA-SR. Some new information feeding the TSPA-SR has since been included. Similarly, the soon-to-be-qualified thermodynamic database data0.ymp has not been released yet

  17. Spectral discrete probability density function of measured wind turbine noise in the far field.

    Science.gov (United States)

    Ashtiani, Payam; Denison, Adelaide

    2015-01-01

    Of interest is the spectral character of wind turbine noise at typical residential set-back distances. In this paper, a spectral statistical analysis has been applied to immission measurements conducted at three locations. This method provides discrete probability density functions for the Turbine ONLY component of the measured noise. This analysis is completed for one-third octave sound levels, at integer wind speeds, and is compared to existing metrics for measuring acoustic comfort as well as previous discussions on low-frequency noise sources. PMID:25905097

  18. Compact resonator on leather for nonradiative inductive power transfer and far-field data links

    Science.gov (United States)

    Monti, G.; Corchia, L.; De Benedetto, E.; Tarricone, L.

    2016-06-01

    In this paper, a wearable resonator suitable to be used for both power and data transmission is presented. The basic element is a complementary split ring resonator that has been optimized to operate both as a dipole-like antenna at 2.45 GHz and as the receiver of a resonant energy link operating at 915 MHz when coupled with an identical external resonator connected to a power source. Experimental data referring to a prototype fabricated by using a conductive adhesive fabric on a leather substrate are reported and discussed. With regard to the wireless resonant energy link (WREL), it is demonstrated that at 915 MHz, the RF-to-RF power transfer efficiency of the link is approximately 78.1%. As for the performance obtained when the resonator is used as an antenna, a gain of approximately -0.43 dB was obtained. Additionally, the performance of the proposed link when connected to a Power Management Unit (PMU) that converts the radio frequency (RF) energy received by the wearable resonator into DC energy that can be directly used for recharging a thin-film battery was also investigated. Experimental tests were performed in order to evaluate both the total efficiency of the wireless charger (i.e., the WREL link connected to the PMU) and the time necessary to recharge a THINERGY MEC201 battery. The obtained results demonstrate the feasibility of using the proposed WREL for implementing a battery charger; in particular, by providing an input power higher than 8 dBm, the time necessary to recharge the considered thin-film battery is shorter than 38 min.

  19. Efficient voice activity detection in reverberant enclosures using far field microphones

    DEFF Research Database (Denmark)

    Petsatodis, Theodore; Boukis, Christos

    2009-01-01

    core of the system is a pair of Hidden Markov Models, that effectively model the speech presence and speech absence situations. To minimise mis-detections an adaptive threshold is used, while a hang-over scheme caters for the intra-frame correlation of speech signals. Experimental results conducted in...

  20. Corkscrew point spread function for far-field three-dimensional nanoscale localization of pointlike objects

    OpenAIRE

    Lew, Matthew D.; Steven F. Lee; Badieirostami, Majid; Moerner, W. E.

    2011-01-01

    We describe the corkscrew point spread function (PSF), which can localize objects in three dimensions throughout a 3.2 µm depth of field with nanometer precision. The corkscrew PSF rotates as a function of the axial (z) position of an emitter. Fisher information calculations show that the corkscrew PSF can achieve nanometer localization precision with limited numbers of photons. We demonstrate three-dimensional super-resolution microscopy with the corkscrew PSF by imaging beads on the surface...

  1. Solute mass transfer from near field to far field in a HLWR experiment at real scale.

    Science.gov (United States)

    Buil, B.; Peña, J.; Gómez, P.; Garralón, A.; Turrero, M. J.; Sánchez, L.; Durán, J. M.

    2009-04-01

    The FEBEX experiment located in Grimsel (Switzerland) is a 1:1 simulation of a high level waste disposal facility in crystalline rock according to the Spanish concept: two electrical heaters of dimension and weight equivalent to those of the real canisters were installed concentrically with the drift and simulated the thermal effect of the wastes and surrounded by a clay barrier constructed from highly-compacted bentonite blocks. This experiment started in 1996 and the external rim of bentonite is saturated with the granitic water. The difference between the chemical gradients generated by the bentonite porewater and the granitic water made possible the movement of solute into the geosphere. The experiment reproduces in the most realistic conditions, all the processes affecting the radionuclide migration in a HLWR. Two boreholes parallel to the axis of the FEBEX drift were drilled in granite relatively close to the bentonite surface (20 and 60cm) in order to highlight the solute migration mechanisms in crystalline host rock, influenced by the presence of the bentonite buffer and by the geochemical gradients generated at the bentonite/granite interface. After three years of periodic water sampling campaigns in those boreholes, the chemical composition of waters reveal that there is an appreciable increase of Na and Cl concentration in time in the waters sampled from the borehole located at 20cm from the bentonite surface. On the other hand, the Na/Cl ratio in waters is similar to the Na/Cl ratio in the bentonite porewater. For this reason Cl and Na are considered as the main natural tracers indicating the mass transfer process between the bentonite porewater and the granite. A diffusion transport modelling (PHREEQC) was used to describe the mass transfer process. The results show that the Cl and Na concentration in the granitic waters is the result of a diffusive transport from the bentonite to the granite, with a calculated De≈ 5,0E-11 m2/s. These results could have some implications for the performance assessment due to the analogy between 36Cl (one of the dominant radionuclides in the average annual doses in the reference scenario) and the Cl ion. Safety case should take into account the transport of conservative solutes from the bentonite into the granite.

  2. Remote sensing of chlorophyll a fluorescence of vegetation canopies. 1. Near and far field measurement techniques

    International Nuclear Information System (INIS)

    This article presents instruments and techniques, used in several vegetation monitoring experiments. Simultaneous monitoring was performed with different approaches, including fluorescence lidar and passive remote sensing, leaf level reflectance, and laser fluorimetry, and compared with physiological measurements. Most of the instrumentation described was designed and built for this application. Experiments were carried out in the laboratory and in the field, to investigate the relationship between chlorophyll fluorescence spectra and plant ecophysiology. Remote sensing, spectroscopy, and ecophysiology data were then collected by an intensive research team, joining different experiences and working in national and international projects

  3. Near-to-far field transformations for radiative and guided waves

    CERN Document Server

    Yang, Jianji; Lalanne, Philippe

    2015-01-01

    Light emitters or scatterers embedded in stratified media may couple energy to both free space and guided modes of the stratified structure. For a thorough analysis of such structures, it is important to evaluate the angular intensity distribution of both the free-space-propagative and guided waves. In this work, we propose an original method based on Lorentz-reciprocity theorem and on the computation of the near-field around the emitters or scatterers, to efficiently calculate the free-space and guided radiation diagrams with a high accuracy. We also provide an open-source code that may be used with virtually any Maxwells solver. The numerical tool may help to engineer various devices, such as light-emitting diodes or nanoantennas to achieve directional and efficient radiative spontaneous decays in free space and guided optics.

  4. Far field nuclear fallout experience and countermeasure strategy: A cost-benefit re-appraisal

    International Nuclear Information System (INIS)

    The time of the year (April, May) when the fallout occurred, had influence on the consequences. In spring no animals were out grazing and almost no standing crops could receive direct surface contamination. However, uptake and the transfer in the semi-natural ecosystem became considerable important. In semi-natural ecosystems, soils often have a low mineral content and very little clay and this usually means less findings of the radiocaesium. Even before the Chernobyl accident occurred, it was known that the root uptake of radiocaesium in a semi-natural ecosystem was higher than average in agricultural ecosystems

  5. Scaling of far-field wake angle of non-axisymmetric pressure disturbance

    OpenAIRE

    Moisy, Frederic; Rabaud, Marc

    2014-01-01

    It has been recently emphasized that the angle of maximum wave amplitude $\\alpha$ in the wake of a disturbance of finite size can be significantly narrower than the maximum value $\\alpha_K = \\sin^{-1}(1/3) \\simeq 19.47^\\mathrm{o}$ predicted by the classical analysis of Kelvin. For axisymmetric disturbance, simple argument based on the Cauchy-Poisson initial-value problem suggests that the wake angle decreases following a Mach-like law at large velocity, $\\alpha \\simeq Fr_L^{-1}$, where $Fr_L=...

  6. The scaling of far-field wake angle of non-axisymmetric pressure disturbance

    CERN Document Server

    Moisy, Frederic

    2014-01-01

    It has been recently emphasized that the angle of maximum wave amplitude $\\alpha$ in the wake of a disturbance of finite size can be significantly narrower than the maximum value $\\alpha_K = \\sin^{-1}(1/3) \\simeq 19.47^\\mathrm{o}$ predicted by the classical analysis of Kelvin. For axisymmetric disturbance, simple argument based on the Cauchy-Poisson initial-value problem suggests that the wake angle decreases following a Mach-like law at large velocity, $\\alpha \\simeq Fr_L^{-1}$, where $Fr_L=U/\\sqrt{gL}$ is the Froude number based on the disturbance velocity $U$, its size $L$, and gravity $g$. In this paper we extend this analysis to the case of non-axisymmetric disturbances, relevant to real ships. We find that, for intermediate Froude numbers, the wake angle follows an intermediate scaling law $\\alpha \\simeq Fr_L^{-2}$, in agreement with the recent prediction of Noblesse \\textit{et al.} [``Why can ship wakes appear narrower than Kelvin's angle?'' to appear in Eur. J. Mech. B/Fluids (2014)]. We show that bey...

  7. Scaling of far-field wake angle of nonaxisymmetric pressure disturbance.

    Science.gov (United States)

    Moisy, F; Rabaud, M

    2014-06-01

    It has been recently emphasized that the angle of maximum wave amplitude α in the wake of a disturbance of finite size can be significantly narrower than the maximum value α_{K}=sin^{-1}(1/3)≃19.47^{∘} predicted by the classical analysis of Kelvin. For axisymmetric disturbance, a simple argument based on the Cauchy-Poisson initial-value problem suggests that the wake angle decreases following a Mach-like law at large velocity, α≃Fr_{L}^{-1}, where Fr_{L}=U/sqrt[gL] is the Froude number based on the disturbance velocity U, its size L, and gravity g. In this paper we extend this analysis to the case of nonaxisymmetric disturbances, relevant to real ships. We find that, for intermediate Froude numbers, the wake angle follows an intermediate scaling law α≃Fr_{L}^{-2}, in agreement with the recent prediction of Noblesse et al. [Eur. J. Mech. B/Fluids 46, 164 (2014)]. We show that beyond a critical Froude number, which scales as A^{1/2} (where A is the length-to-width aspect ratio of the disturbance), the asymptotic scaling α≃Fr_{B}^{-1} holds, where now Fr_{B}=A^{1/2}Fr_{L} is the Froude number based on the disturbance width. We propose a simple model for this transition, and provide a regime diagram of the scaling of the wake angle as a function of parameters (A,Fr_{L}). PMID:25019876

  8. Electrical model simulation for a UHF RFID system in near and far fields

    OpenAIRE

    Abou Chakra, Sara; Farrukh, Usamah O.; Amante García, Beatriz

    2012-01-01

    Radio Frequency IDentification (RFID) deployment is needed for efficient item identification. A simulation environment in HP-ADS (Advanced Design System of Agilent Technologies) of Ultra High Frequency RFID systems is constructed in this paper. This paper simulates the system through an electrical model. The tag is represented by a simple empirical model representing the antenna and the chip. The chip is modeled by its impedance which varies with the code. The tag’s model is suitable...

  9. Plasmonics of opalic surface: a combined near-and far-field approach

    CERN Document Server

    Lethiec, Clotilde; Popescu, Trajan; Frederich, Hugo; Ngoc, Phan; Yraola, Eduardo; Schwob, Catherine; Charra, Fabrice; Coolen, Laurent; Douillard, Ludovic; Maître, Agnès

    2016-01-01

    An opalic plasmonic sample, constituted by a hexagonal arrangement of metallized silica spheres, presents remarkable optical properties due to the mixing of periodic arrangement and singularities at the sphere touching points. It is therefore an interesting candidate for exploiting the excitation of both localized and propagating surface plasmons. Several channels of excitation based on these properties or exploiting a certain level of disorder are evidenced, opening new routes for the efficient excitation of plasmons on a wide spectral range. The versatility of such hybrid system is evidenced in the context of two complementary experiments: specular reflective spectrometry and photoemission electron microscopy. Both techniques offer different points of view on the same physical phenomenon and the link between them is discussed. Such experiments evidence the opportunities offered by these 2D hybrid materials in the context of nanophotonics.

  10. Numerical spatial marching techniques in duct acoustics. [noise source calculation from far field pressure measurements

    Science.gov (United States)

    Baumeister, K. J.

    1979-01-01

    Direct calculation of the internal structure of a ducted noise source from farfield pressure measurements is regarded as an initial value problem, where the pressure and pressure gradient (farfield impedance) are assumed to be known along a line in the farfield. If pressure and impedance are known at the boundary of the farfield, the pressure can be uniquely determined in the vicinity of the inlet and inside the inlet ducting. A marching procedure is developed which, with this information obtained from measurements, enables a description of a ducted noise source. The technique uses a finite difference representation of the homogeneous Helmholtz equation.

  11. Spherical-Wave Far-Field Interferometer for Hard X-Ray Phase Contrast Imaging

    CERN Document Server

    Miao, Houxun; Harmon, Katherine J; Bennett, Eric E; Chedid, Nicholas; Panna, Alireza; Bhandarkar, Priya; Wen, Han

    2014-01-01

    Low dose, high contrast x-ray imaging is of general interest in medical diagnostic applications. X-ray Mach-Zehnder interferometers using collimated synchrotron beams demonstrate the highest levels of phase contrast under a given exposure dose. However, common x-ray sources emit divergent cone beams. Here, we developed a spherical-wave inline Mach-Zehnder interferometer for phase contrast imaging over an extended area with a broadband and divergent source. The first tabletop system was tested in imaging experiments of a mammographic accreditation phantom and various biological specimens. The noise level of the phase contrast images at a clinical radiation dose corresponded to a 6 nano radian bending of the x-ray wavefront. Un-resolved structures with conventional radiography and near-field interferometer techniques became visible at a fraction of the radiation dose.

  12. Spectral discrete probability density function of measured wind turbine noise in the far field

    Directory of Open Access Journals (Sweden)

    Payam eAshtiani

    2015-04-01

    Full Text Available Of interest is the spectral character of wind turbine noise at typical residential set-back distances. In this paper a spectral statistical analysis has been applied to immission measurements conducted at three locations. This method provides discrete probability density functions for the Turbine ONLY component of the measured noise. This analysis is completed for 1/3rd Octave sound levels, at integer wind speeds, and is compared to existing metrics for measuring acoustic comfort as well as previous discussions on low frequency noise sources.

  13. Far-Field Accumulation of Fissile Material From Waste Packages Containing Plutonium Disposition Waste Form

    Energy Technology Data Exchange (ETDEWEB)

    J.P. Nicot

    2000-09-29

    The objective of this calculation is to estimate the quantity of fissile material that could accumulate in fractures in the rock beneath plutonium-ceramic (Pu-ceramic) and Mixed-Oxide (MOX) waste packages (WPs) as they degrade in the potential monitored geologic repository at Yucca Mountain. This calculation is to feed another calculation (Ref. 31) computing the probability of criticality in the systems described in Section 6 and then ultimately to a more general report on the impact of plutonium on the performance of the proposed repository (Ref. 32), both developed concurrently to this work. This calculation is done in accordance with the development plan TDP-DDC-MD-000001 (Ref. 9), item 5. The original document described in item 5 has been split into two documents: this calculation and Ref. 4. The scope of the calculation is limited to only very low flow rates because they lead to the most conservative cases for Pu accumulation and more generally are consistent with the way the effluent from the WP (called source term in this calculation) was calculated (Ref. 4). Ref. 4 (''In-Drift Accumulation of Fissile Material from WPs Containing Plutonium Disposition Waste Forms'') details the evolution through time (breach time is initial time) of the chemical composition of the solution inside the WP as degradation of the fuel and other materials proceed. It is the chemical solution used as a source term in this calculation. Ref. 4 takes that same source term and reacts it with the invert; this calculation reacts it with the rock. In addition to reactions with the rock minerals (that release Si and Ca), the basic mechanisms for actinide precipitation are dilution and mixing with resident water as explained in Section 2.1.4. No other potential mechanism such as flow through a reducing zone is investigated in this calculation. No attempt was made to use the effluent water from the bottom of the invert instead of using directly the effluent water from the WP. This calculation supports disposal criticality analysis and has been prepared in accordance with AP-3.12Q, Calculations (Ref. 49). This calculation uses results from Ref. 4 on actinide accumulation in the invert and more generally does reference heavily the cited calculation. In addition to the information provided in this calculation, the reader is referred to the cited calculation for a more thorough treatment of items applying to both the invert and fracture system such as the choice of the thermodynamic database, the composition of J-13 well water, tuff composition, dissolution rate laws, Pu(OH){sub 4} solubility and also for details on the source term composition. The flow conditions (seepage rate, water velocity in fractures) in the drift and the fracture system beneath initially referred to the TSPA-VA because this work was prepared before the release of the work feeding the TSPA-SR. Some new information feeding the TSPA-SR has since been included. Similarly, the soon-to-be-qualified thermodynamic database data0.ymp has not been released yet.

  14. Robustness of the far-field response of nonlocal plasmonic ensembles

    DEFF Research Database (Denmark)

    Tserkezis, Christos; Maack, Johan Rosenkrantz; Liu, Zhaowei;

    2016-01-01

    distribution. For a normal distribution of free-electron nanoparticles, and within the simple nonlocal hydrodynamic Drude model, both the nonlocal blueshift and the plasmon linewidth are shown to be considerably affected by ensemble averaging. Size-variance effects tend however to conceal nonlocality to a...

  15. Transverse distinguishability of entangled photons with arbitrarily shaped spatial near- and far-field distributions

    CERN Document Server

    Elsner, Robert; Pieplow, Gregor; Heuer, Axel; Menzel, Ralf

    2014-01-01

    Entangled photons generated by spontaneous parametric down conversion inside a nonlinear crystal exhibit a complex spatial photon count distribution. A quantitative description of this distribution helps with the interpretation of experiments that depend on this structure. We developed a theoretical model and an accompanying numerical calculation that includes the effects of phase matching and the crystal properties to describe a wide range of spatial effects in two-photon experiments. The numerical calculation was tested against selected analytical approximations. We furthermore performed a double-slit experiment where we measured the visibility V and the distinguishability D and obtained $D^2 + V^2 = 1.43$. The numerical model accurately predicts these experimental results.

  16. Learning for autonomous navigation : extrapolating from underfoot to the far field

    Science.gov (United States)

    Matthies, Larry; Turmon, Michael; Howard, Andrew; Angelova, Anelia; Tang, Benyang; Mjolsness, Eric

    2005-01-01

    Autonomous off-road navigation of robotic ground vehicles has important applications on Earth and in space exploration. Progress in this domain has been retarded by the limited lookahead range of 3-D sensors and by the difficulty of preprogramming systems to understand the traversability of the wide variety of terrain they can encounter. Enabling robots to learn from experience may alleviate both of these problems. We define two paradigms for this, learning from 3-D geometry and learning from proprioception, and describe initial instantiations of them we have developed under DARPA and NASA programs. Field test results show promise for learning traversability of vegetated terrain, learning to extend the lookahead range of the vision system, and learning how slip varies with slope.

  17. Far-Field Voice Activity Detection and Its Applications in Adverse Acoustic Environments

    DEFF Research Database (Denmark)

    Petsatodis, Theodoros

    2012-01-01

    Voice Activity Detection (VAD), being in the focus of speech processing research for many years, is nowadays a mature technology with application in several sectors. Embedded VAD components in telecommunications systems (like in cellular telephony) attempt to reduce power consumption of transmitt......Voice Activity Detection (VAD), being in the focus of speech processing research for many years, is nowadays a mature technology with application in several sectors. Embedded VAD components in telecommunications systems (like in cellular telephony) attempt to reduce power consumption of...... have to be taken in order to build a robust system able to operate under variable and adverse conditions. Given that for most of speech processing systems it is of crucial importance to have a reasonable approximation for the probability density function (pdf) of speech, understanding the properties of...... two-sided Gamma distribution. The increased adaptability of the system along with the encapsulated adaptive threshold allows the system to perform remarkably under adverse complex phenomena. Following recent technological trends, of incorporating microphone arrays in numerous commercial applications...

  18. Verification and validation of models: far-field modelling of radionuclide migration

    International Nuclear Information System (INIS)

    The aim of this project was to improve the capability, efficiency and realism of the NAMMU and NAPSAC codes, which simulate groundwater flow and solute transport. Using NAMMU, various solution methods for non linear problems were investigated. The Broyden method gave a useful reduction in computing time and appeared robust. The relative saving obtained with this method increased with the problem size. This was also the case when parameter stepping was used. The existing empirical sorption models in NAMMU were generalized and a ternary heterogeneous ion exchange model was added. These modifications were tested and gave excellent results. The desirability of coupling NAMMU to an existing geochemical speciation code was assessed

  19. Localizing Near and Far Field Acoustic Sources with Distributed Microhone Arrays

    DEFF Research Database (Denmark)

    Hansen, Martin Weiss; Jensen, Jesper Rindom; Christensen, Mads Græsbøll

    2014-01-01

    In this paper, we consider the problem of acoustic source localization using distributed microphone arrays. Time differences of arrival (TDOAs) are estimated using a recently proposed method based on joint direction of arrival (DOA) and range estimation. The TDOAs are used to estimate the location...... method based on joint DOA and pitch estimation, using synthesized harmonic signals with varying source position. Results show a decrease in the error of the estimated position when joint DOA and range estimation is used for TDOA estimation, compared to the GCC-PHAT and joint DOA and pitch methods....

  20. Waveguide-based ultrasonic and far-field electromagnetic sensors for downhole reservoir characterization.

    Energy Technology Data Exchange (ETDEWEB)

    Sheen, S. H.; Chien, H. T.; Wang, K.; Liao, S.; Gopalsami, N.; Bakhtiari, S.; Raptis, A. C.; Nuclear Engineering Division

    2010-11-12

    This report summarizes the first year research and development effort leading to development of high-temperature sensors for enhanced geothermal systems. It covers evaluation of ultrasonic and electromagnetic (EM) techniques applied to temperature measurement and flow characterization. On temperature measurement, we have evaluated both microwave radiometry and ultrasonic techniques for temperature gradient and profile measurements. Different antenna designs are evaluated and array loop antenna design is selected for further development. We have also evaluated ultrasonic techniques for total flow characterization, which includes using speed of sound to determine flow temperature, measuring acoustic impedance to estimate fluid density, and using cross-correlation technique to determine the mass flow rate. Method to estimate the flow enthalpy is briefly discussed. At end, the need and proposed techniques to characterize the porosity and permeability of a hot dry rock resource are presented.

  1. A fully analytic treatment of resonant inductive coupling in the far field

    International Nuclear Information System (INIS)

    For the application of resonant inductive coupling for wireless power transfer, fabrication of flat spiral coils using ribbon wire allows for analytic expressions of the capacitance and inductance of the coils and therefore the resonant frequency. The expressions can also be used in an approximate way for the analysis of coils constructed from cylindrical wire. Ribbon wire constructed from both standard metals as well as high temperature superconducting material is commercially available, so using these derived expressions as a basis, a fully analytic treatment is presented that allows for design trades to be made for hybrid designs incorporating either technology. The model is then extended to analyze the performance of the technology as applied to inductively coupled communications, which has been demonstrated as having an advantage in circumstances where radiated signals would suffer unacceptable levels of attenuation. - Highlights: ► An analytic framework finds power and efficiency for resonant inductive coupling. ► The framework supports superconducting, resistive and dielectric elements. ► Maximum power transfer occurs at an efficiency of 50% when in close proximity. ► A 100 turn superconducting design achieves 10% efficiency out to 280 coil radii. ► The system response to narrow band amplitude modulation is modeled and presented.

  2. Far-field resonance fluorescence from a dipole-interacting laser-driven cold atomic gas

    CERN Document Server

    Jones, Ryan; Olmos, Beatriz

    2016-01-01

    We analyze the temporal response of the fluorescence light that is emitted from a dense gas of cold atoms driven by a laser. When the average interatomic distance is smaller than the wavelength of the photons scattered by the atoms, the system exhibits strong dipolar interactions and collective dissipation. We solve the exact dynamics of small systems with different geometries and show how these collective features are manifest in the scattered light properties such as the photon emission rate, the power spectrum and the second-order correlation function. By calculating these quantities beyond the weak driving limit, we make progress in understanding the signatures of collective behavior in these many-body systems. Furthermore, we clarify the role of disorder on the resonance fluorescence, of direct relevance for recent experimental efforts that aim at the exploration of many-body effects in dipole-dipole interacting gases of atoms.

  3. Yucca Mountain Project far-field sorption studies and data needs

    International Nuclear Information System (INIS)

    Batch sorption experiments in which radionuclides dissolved in groundwaters from Yucca Mountain were sorbed onto samples of crushed tuff have resulted in a substantial database of sorption coefficients for radionuclides of interest to the repository program. Although this database has been useful in preliminary evaluations of Yucca Mountain as a potential site for a nuclear waste repository, the database has limitations that must be addressed before it can be used for performance assessment calculations in support of a license application for a waste repository. The purpose of this paper is to: review the applicability of simple (constant) sorption coefficients in transport calculations; review and evaluate alternative methods for the derivation of sorption coefficients; summarize and evaluate the present YMP sorption database to identify areas of data sufficiency and significant data gaps; summarize our current understanding of pertinent sorption mechanisms and associated kinetic parameters; evaluate the significance to the YMP of potential problems in the experimental determination and field application of sorption coefficients as enumerated by the NRC (Nuclear Regulatory Commission, 1987) in its technical position paper on sorption; formulate and evaluate strategies for the resolution of NRC concerns regarding experimental problems; and formulate a position on the sorption coefficient database and the level of understanding of sorption mechanisms likely to be required in the licensing application. 75 refs., 1 fig., 2 tabs

  4. An energy absorbing far-field boundary condition for the elastic wave equation

    Energy Technology Data Exchange (ETDEWEB)

    Petersson, N A; Sjogreen, B

    2008-07-15

    The authors present an energy absorbing non-reflecting boundary condition of Clayton-Engquist type for the elastic wave equation together with a discretization which is stable for any ratio of compressional to shear wave speed. They prove stability for a second order accurate finite-difference discretization of the elastic wave equation in three space dimensions together with a discretization of the proposed non-reflecting boundary condition. The stability proof is based on a discrete energy estimate and is valid for heterogeneous materials. The proof includes all six boundaries of the computational domain where special discretizations are needed at the edges and corners. The stability proof holds also when a free surface boundary condition is imposed on some sides of the computational domain.

  5. In vivo location of the vermiform appendix in multidetector CT

    International Nuclear Information System (INIS)

    To provide a more detailed classification system regarding the position of the vermiform appendix within the right lower quadrant, as seen on multidetector computed tomography (MDCT) and to investigate the relative differences in frequency of appendiceal position according to patient gender and the pathologic state of appendix. Between January 2008 and December 2010, 1157 patients were included in our final analysis: 542 patients with preoperative MDCT and subsequent appendectomy and 615 patients with visible appendix seen on MDCT performed as part of a health checkup. We classified the appendix according to its position relative to the cecum, the terminal ileum, and the external iliac vessels: type 1: antececal; type 2: preileal; type 3: postileal; type 4: subileal; type 5: subcecal; type 6: deep pelvic; type 7: retrocecal; and type 8: paracecal. The relative incidence of various positions of the appendix found in all of our study patients was: type 1: 3.5%; type 2: 1.7%; type 3: 9.0%; type 4: 12.9%; type 5: 42.3%; type 6: 16.2%; type 7: 10.9%; and type 8: 3.0%. According to patient gender, type 1 (male: 3.7% vs. female: 3.3%), type 3 (8.6% vs. 9.8%), type 4 (14.3% vs. 9.8%), type 5 (47.5% vs. 32.7%), type 7 (9.2% vs. 14.4%), and type 8 (3.4% vs. 2.2%) positions showed a statistically significant male predominance. In terms of the inflamed state, type 2 preileal (normal: 0.8% vs. inflamed: 2.8%), type 3 (10.2% vs. 7.6%), type 4 (14.0% vs. 11.6%), and type 5 (14.1% vs. 18.5%) positions showed a statistically significant difference. Contrary to the common assumption that the retrocecal appendix is the most common position, the in vivo appendix is seen more often on MDCT in the subcecal and deep pelvic positions. The relative frequency of various positions of the appendix can also differ according to patient gender and the pathologic state.

  6. The bumper module of the Audi A4; Das Stossfaengersystem des Audi A4

    Energy Technology Data Exchange (ETDEWEB)

    Haberer, K. [Audi AG, Ingolstadt (Germany)

    2000-11-01

    Special attention was given to the bumper module of the new A4 during the development process. It is notable for its flush integration into the body, with 'zero' clearances and short overhangs. The module includes the bumper supports, the outer covering, the air inlet grille, the fog lights and the horns. Optional extras are an integrated ultrasonic 'Acoustic Parking System' (either front and rear or at the rear only) and a headlamp washer system. Both the bumper support and the deformation elements are made of weight-saving aluminium. The holder for the towing lug has been integrated into the right-hand deformation element and the towing forces are borne centrally by the side member. (orig.) [German] Dem Stossfaengermodul des neuen A4 wurde bei der Entwicklung besondere Aufmerksamkeit gewidmet. Es zeichnet sich durch eine buendige Formintegration in die Karosserie mit sogenannten Nullfugen und durch kurze Karosserieueberstaende aus. (orig.)

  7. Spent Fuel Pool Decommissioning After a Severe Accident. Appendix

    International Nuclear Information System (INIS)

    Most decommissioning related publications by the IAEA [A.1–A.4] and other organizations clearly specify that their scope applies to the decommissioning of nuclear facilities under planned conditions. It is generally specified that decommissioning of facilities that have been subject to a severe accident is excluded from the scope of these publications. This is because of the peculiar, and generally unpredictable, circumstances resulting from a severe accident, including, among others, high radiation and contamination fields, abnormal waste and unexpected configuration changes. Based on the literature, there is no unique definition of a severe accident. All definitions include various consequence (damage) types (evacuees, injured persons, fatalities or costs) and a minimum level for each damage type. The differences between the definitions concern both the set of specific consequence types considered and the damage threshold. For the purposes of this publication, the scope of this Appendix encompasses only facilities (spent fuel pools) that have been seriously contaminated and physically damaged to the point that planned routine decommissioning strategies and techniques are unusable or impractical. It should be noted that there are three phases typically associated with a post-accident phase: stabilization, recovery and decommissioning. Stabilization refers to the immediate aftermath of a nuclear accident, and implies controlling of conditions so that impacts to the environment and public are controlled and minimized. Recovery entails the planning and implementation of activities to limit, and subsequently reduce, the extent of abnormal conditions, and prepare the plant for achievement of a longer term, safer configuration. Recovery can be viewed as a precursor to decommissioning. However, there is no clear-cut line between the three above mentioned phases. In fact, conditions generated by the accident and its evolution may initially be recognized, faced and dealt

  8. Appendix: XXXVI: Integrating knowledge within business processes

    International Nuclear Information System (INIS)

    AMEC NNC is a privately owned international engineering, project management, safety and technical consultancy, dedicated to providing expert advice and solutions to complex engineering and project management challenges in the nuclear and non-nuclear markets. Employing in excess of 1000 people, our network comprises 31 offices across the world. AMEC plc is a world leader in technical services and project management, employing around 45,000 people in some 40 countries around the world. AMEC specializes in the design, delivery and support of infrastructure ranging from local technical services to international landmark projects. This appendix describes the methodology used by AMEC NNC to capture knowledge and best practice within its business processes. In 2003, AMEC NNC conducted an audit of its policies, processes and procedures. This resulted in a number of 'problem areas' being highlighted. We found conflicting business process information and in some cases key areas had no processes associated to them at all. It was felt that much of this had occurred due to rapid growth, confused process ownership and a complex arrangement of documented quality procedures. AMEC NNC decided there was a need to implement a new Integrated Management System (IMS) - a system based on processes and roles first, and supporting documentation second. Fundamental areas such as Quality and Health and Safety would now be inherent in key business areas such as engineering project management, procurement and administration. Additionally, it was deemed beneficial to link 'knowledge' to the execution of the process that would allow new or inexperienced staff to become quickly familiar with best practice and to execute tasks in an efficient and safe manner. After competitive tender, AMEC NNC chose ARIS (Architecture of Integrated Information Systems) from IDS Scheer as the tool for designing and modelling its business processes and capturing best practice

  9. 40 CFR Appendix F to Part 60 - Quality Assurance Procedures

    Science.gov (United States)

    2010-07-01

    ....epa.gov/ttn/emc. 3. Method 205, “Verification of Gas Dilution Systems for Field Instrument... (CONTINUED) STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES (CONTINUED) Pt. 60, App. F Appendix F to Part... section 5) and shall be completed by March 4, 1988 or the date of the initial performance test required...

  10. 18 CFR 301.6 - Appendix 1 instructions.

    Science.gov (United States)

    2010-04-01

    ... Investment/Rate Base (2) Schedule 1A: Cash Working Capital (3) Schedule 2: Capital Structure and Rate of... functionalize the Utility's costs. (h) A Utility operating in more than one Pacific Northwest Jurisdiction must file one Appendix 1. (i)(1) A Utility operating in a Jurisdiction within the Pacific Northwest...

  11. 50 CFR Appendix B to Part 622 - Gulf Areas

    Science.gov (United States)

    2010-10-01

    ..., DEPARTMENT OF COMMERCE FISHERIES OF THE CARIBBEAN, GULF, AND SOUTH ATLANTIC Pt. 622, App. B Appendix B to... Florida/Alabama border 29°34.5′ 87°38.0′ 16Off Mobile Bay 29°41.0′ 88°00.0′ 17South of...

  12. Torsion of an Epiploic Appendix Pretending as Acute Appendicitis

    Directory of Open Access Journals (Sweden)

    Kamran Ahmad Malik

    2010-07-01

    Full Text Available Torsion of an epiploic appendix is a rare surgical entity. Its unusual symptomatology, wide variation in physical findings and the absence of helpful laboratory and radiological studies makes it very difficult to diagnose pre-operatively. This is a report of this rare entity found in a patient upon diagnostic laparoscopy performed for suspected acute appendicitis

  13. Mucocele of the appendix with magnetic resonance imaging findings

    International Nuclear Information System (INIS)

    Mucocele of the appendix is a rare lesion caused by abnormal accumulation of mucus. Although preoperative diagnosis is important to avoid rupture of a mucocele, the diagnosis is often made at surgery. We report a case of an appendiceal mucocele that mimicked a hydrosalpinx on CT and MRI. Copyright (2006) Blackwell Science Pty Ltd

  14. 49 CFR Appendix B to Part 192 - Qualification of Pipe

    Science.gov (United States)

    2010-10-01

    ... appendix B of part 192, see the List of CFR Sections Affected, which appears in the Finding Aids section of... Pipe I. Listed Pipe Specifications API 5L—Steel pipe, “API Specification for Line Pipe” (incorporated..., at least one test weld must be made for each 100 lengths of pipe. On pipe 4 inches (102...

  15. Construction safety program for the National Ignition Facility, Appendix B

    International Nuclear Information System (INIS)

    This Appendix contains material from the LLNL Health and Safety Manual as listed below. For sections not included in this list, please refer to the Manual itself. The areas covered are: asbestos, lead, fire prevention, lockout, and tag program confined space traffic safety

  16. 32 CFR Appendix A to Part 199 - Acronyms

    Science.gov (United States)

    2010-07-01

    ... CIVILIAN HEALTH AND MEDICAL PROGRAM OF THE UNIFORMED SERVICES (CHAMPUS) Pt. 199, App. A Appendix A to Part... (Health Affairs) CCLR—Claims Collection Litigation Report CEOB—CHAMPUS Explanation of Benefits CFR—Code of Federal Regulations CHAMPUS—Civilian Health and Medical Program of the Uniformed Services...

  17. 31 CFR Appendix D to Part 359 - Tax Considerations

    Science.gov (United States)

    2010-07-01

    ... 31 Money and Finance: Treasury 2 2010-07-01 2010-07-01 false Tax Considerations D Appendix D to Part 359 Money and Finance: Treasury Regulations Relating to Money and Finance (Continued) FISCAL SERVICE, DEPARTMENT OF THE TREASURY BUREAU OF THE PUBLIC DEBT OFFERING OF UNITED STATES SAVINGS...

  18. 31 CFR Appendix C to Part 356 - Investment Considerations

    Science.gov (United States)

    2010-07-01

    ... 31 Money and Finance: Treasury 2 2010-07-01 2010-07-01 false Investment Considerations C Appendix C to Part 356 Money and Finance: Treasury Regulations Relating to Money and Finance (Continued) FISCAL SERVICE, DEPARTMENT OF THE TREASURY BUREAU OF THE PUBLIC DEBT SALE AND ISSUE OF MARKETABLE...

  19. 31 CFR Appendix to Part 351 - Tax Considerations

    Science.gov (United States)

    2010-07-01

    ... 31 Money and Finance: Treasury 2 2010-07-01 2010-07-01 false Tax Considerations Appendix to Part 351 Money and Finance: Treasury Regulations Relating to Money and Finance (Continued) FISCAL SERVICE, DEPARTMENT OF THE TREASURY BUREAU OF THE PUBLIC DEBT OFFERING OF UNITED STATES SAVINGS BONDS, SERIES EE...

  20. 12 CFR Appendix B to Part 307 - Institution Letterhead

    Science.gov (United States)

    2010-01-01

    .... This Notice is being provided pursuant to 12 CFR 307.3. Please contact , at if additional information... 12 Banks and Banking 4 2010-01-01 2010-01-01 false Institution Letterhead B Appendix B to Part 307...—Institution Letterhead SUBJECT: Notice to Depositor of Voluntary Termination of Insured Status The...

  1. 12 CFR Appendix A to Part 307 - Transferring Institution Letterhead

    Science.gov (United States)

    2010-01-01

    .... A Appendix A to Part 307—Transferring Institution Letterhead SUBJECT: Certification of Total Assumption of Deposits This certification is being provided pursuant to 12 U.S.C. 1818(q) and 12 CFR 307.2... 12 Banks and Banking 4 2010-01-01 2010-01-01 false Transferring Institution Letterhead A...

  2. Appendix H - GPRA06 industrial technologies program documentation

    Energy Technology Data Exchange (ETDEWEB)

    None, None

    2009-01-18

    The information provided in this appendix is based on the Industrial Technologies Program (ITP) report of the GPRA06 process, "GPRA06 Quality Metrics - Methodology and Results," Energetics Inc., October 25, 2004. The report includes additional methodological details and the actual off-line energy savings results submitted to the Office of Energy Efficiency and Renewable Energy (EERE).

  3. 49 CFR Appendix D to Part 178 - Thermal Resistance Test

    Science.gov (United States)

    2010-10-01

    .... 178, App. D Appendix D to Part 178—Thermal Resistance Test 1. Scope. This test method evaluates the thermal resistance capabilities of a compressed oxygen generator and the outer packaging for a cylinder of compressed oxygen or other oxidizing gas and an oxygen generator. When exposed to a temperature of 205...

  4. 46 CFR Appendix A to Part 154 - Equivalent Stress

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 5 2010-10-01 2010-10-01 false Equivalent Stress A Appendix A to Part 154 Shipping...—Equivalent Stress I. Equivalent stress (σ c) is calculated by the following formula or another formula... normal stress in “x” direction. σy=total normal stress in “y” direction. τxy=total shear stress in...

  5. 15 CFR Appendix I to Part 921 - Biogeographic Classification Scheme

    Science.gov (United States)

    2010-01-01

    ... 15 Commerce and Foreign Trade 3 2010-01-01 2010-01-01 false Biogeographic Classification Scheme I... RESOURCE MANAGEMENT NATIONAL ESTUARINE RESEARCH RESERVE SYSTEM REGULATIONS Pt. 921, App. I Appendix I to Part 921—Biogeographic Classification Scheme Acadian 1. Northern of Maine (Eastport to the...

  6. Kentucky Consumer & Homemaking Education. Appendix for Curriculum Guide.

    Science.gov (United States)

    Bishop, Helen; And Others

    As the appendix for a series of curriculum guides for consumer and homemaking education on the secondary level in Kentucky, this booklet contains instructional activities for classroom use in conjunction with the units in the comprehensive curriculum guides. Included are games, puzzles, skits, quizzes, survey forms, checklists, and review sheets…

  7. 32 CFR Appendix A to Part 154 - Investigative Scope

    Science.gov (United States)

    2010-07-01

    ... PERSONNEL SECURITY PROGRAM REGULATION Pt. 154, App. A Appendix A to Part 154—Investigative Scope This... background, suitability, and loyalty shall be interviewed personally. Efforts shall be made to interview... knowledge concerning the individual's character, discretion, and loyalty. Listed character references...

  8. 7 CFR Appendix A to Part 3015 - Definitions

    Science.gov (United States)

    2010-01-01

    ... CFR 620.2, 40 FR 12472, March 19, 1974), any other regional or interstate government entity, or any... AGRICULTURE UNIFORM FEDERAL ASSISTANCE REGULATIONS Pt. 3015, App. A Appendix A to Part 3015—Definitions... specifically, a county, municipality, city, town, township, local public authority, school district,...

  9. 43 CFR Appendix A to Part 18 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-10-01

    ... 43 Public Lands: Interior 1 2010-10-01 2010-10-01 false Certification Regarding Lobbying A... LOBBYING Pt. 18, App. A Appendix A to Part 18—Certification Regarding Lobbying Certification for Contracts...-LLL, “Disclosure Form to Report Lobbying,” in accordance with its instructions. (3) The...

  10. 31 CFR Appendix A to Part 21 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-07-01

    ... 31 Money and Finance: Treasury 1 2010-07-01 2010-07-01 false Certification Regarding Lobbying A... ON LOBBYING Pt. 21, App. A Appendix A to Part 21—Certification Regarding Lobbying Certification for... Standard Form-LLL, “Disclosure Form to Report Lobbying,” in accordance with its instructions. (3)...

  11. 40 CFR Appendix A to Part 34 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 1 2010-07-01 2010-07-01 false Certification Regarding Lobbying A... ASSISTANCE NEW RESTRICTIONS ON LOBBYING Pt. 34, App. A Appendix A to Part 34—Certification Regarding Lobbying... and submit Standard Form-LLL, “Disclosure Form to Report Lobbying,” in accordance with...

  12. 15 CFR Appendix A to Part 28 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-01-01

    ... 15 Commerce and Foreign Trade 1 2010-01-01 2010-01-01 false Certification Regarding Lobbying A... LOBBYING Pt. 28, App. A Appendix A to Part 28—Certification Regarding Lobbying Certification for Contracts...-LLL, “Disclosure Form to Report Lobbying,” in accordance with its instructions. (3) The...

  13. 13 CFR Appendix A to Part 146 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-01-01

    ... 13 Business Credit and Assistance 1 2010-01-01 2010-01-01 false Certification Regarding Lobbying A... LOBBYING Pt. 146, App. A Appendix A to Part 146—Certification Regarding Lobbying Certification for... Standard Form-LLL, “Disclosure Form to Report Lobbying,” in accordance with its instructions. (3)...

  14. 24 CFR Appendix A to Part 87 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-04-01

    ... 24 Housing and Urban Development 1 2010-04-01 2010-04-01 false Certification Regarding Lobbying A... Urban Development NEW RESTRICTIONS ON LOBBYING Pt. 87, App. A Appendix A to Part 87—Certification Regarding Lobbying Certification for Contracts, Grants, Loans, and Cooperative Agreements The...

  15. 28 CFR Appendix A to Part 69 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-07-01

    ... 28 Judicial Administration 2 2010-07-01 2010-07-01 false Certification Regarding Lobbying A... LOBBYING Pt. 69, App. A Appendix A to Part 69—Certification Regarding Lobbying Certification for Contracts...-LLL, “Disclosure Form to Report Lobbying,” in accordance with its instructions. (3) The...

  16. Adenocarcinoid of the appendix presenting with metastases to the liver

    DEFF Research Database (Denmark)

    Bak, Martin; Jørgensen, L J

    1987-01-01

    A case of hepatomegalia due to multiple metastases of unknown origin to the liver is described. At autopsy the primary tumor, an adenocarcinoid tumor of the appendix, was identified along with multiple metastases to the lymph nodes and widespread peritoneal carcinoidosis. Hepatic metastases from an...... of the metastases of appendiceal adenocarcinoids is modulated by factors in the recipient organ....

  17. 32 CFR Appendix H to Part 505 - Definitions

    Science.gov (United States)

    2010-07-01

    ... Defense Department of Defense (Continued) DEPARTMENT OF THE ARMY AID OF CIVIL AUTHORITIES AND PUBLIC RELATIONS ARMY PRIVACY ACT PROGRAM Pt. 505, App. H Appendix H to Part 505—Definitions Function (a) Access...) Members of the Public. Individuals or parties acting in a private capacity. (o) Minor. An individual...

  18. 32 CFR Appendix B to Part 513 - Standards of Fairness

    Science.gov (United States)

    2010-07-01

    ... PUBLIC RELATIONS INDEBTEDNESS OF MILITARY PERSONNEL Pt. 513, App. B Appendix B to Part 513—Standards of... (1976)) and the Federal Reserve Board Regulation Z (12 CFR part 226 and §§ 226.3, 226.9 (1978))....

  19. 33 CFR Appendix I to Subpart A of... - Vessel Dimensions

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Vessel Dimensions I Appendix I to... Subpart A of Part 401—Vessel Dimensions Structures are located at a number of Seaway locks which, when... of 23.2 m. For vessels that have a beam width less than this and that have dimensions exceeding...

  20. 25 CFR Appendix B to Subpart C - Population Adjustment Factor

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Population Adjustment Factor B Appendix B to Subpart C...—Population Adjustment Factor 1. The Population Adjustment Factor allows for participation in the IRR Program... is available in accordance with the TTAM each fiscal year for a tribe based on the population...

  1. 14 CFR Appendix K to Part 25 - Extended Operations (ETOPS)

    Science.gov (United States)

    2010-01-01

    ... airplane-engine combination has been evaluated under 14 CFR 25.1535 and found suitable for (identify... does not apply to airplanes with a required flight engineer. (b) APU design. If an APU is needed to comply with this appendix, the applicant must demonstrate that: (1) The reliability of the APU...

  2. Mucocele of the appendix. Review of 10 cases

    International Nuclear Information System (INIS)

    The purpose of our work was to assess the value of abdominal sonography (US) and computed tomography (CT) in the preoperative diagnosis of appendiceal mucocele. We retrospectively reviewed 10 cases of mucocele of the appendix, 7 cases without pseudo myxoma peritonei, and 3 cases with pseudo-myxoma peritonei. All cases were investigated radiologically by plain film and US, barium enema was performed in 3 cases and CT in 5 cases. Mucoceles of the appendix are rare and their clinical presentation is not specific. US confirms the appendicular involvement, but often poses the differential diagnosis with acute inflammation, abscess or localized appendicular peritonitis. CT appears as a mandatory examination since it allows accurate preoperative diagnosis period. In this series, the diagnosis was made preoperatively in the 5 cases where CT had been performed. US is useful to confirm the abnormal pattern of the appendix but does not allow accurate diagnosis of mucocele. CT is more specific and accurate for diagnosis of mucocele of the appendix. (authors)

  3. Appendix D: More on Recommendations. [2014 Teacher Prep Review

    Science.gov (United States)

    Greenberg, Julie; Walsh, Kate; McKee, Arthur

    2014-01-01

    The "NCTQ Teacher Prep Review" evaluates the quality of programs that provide preservice preparation of public school teachers. This appendix presents next steps for prospective college or graduate students who aspire to enter teaching (and their parents) and for current students who are already enrolled in a teacher preparation program…

  4. 24 CFR Appendix E to Part 3500 - Arithmetic Steps

    Science.gov (United States)

    2010-04-01

    ... 24 Housing and Urban Development 5 2010-04-01 2010-04-01 false Arithmetic Steps E Appendix E to Part 3500 Housing and Urban Development Regulations Relating to Housing and Urban Development...—Arithmetic Steps I. Example Illustrating Aggregate Analysis: ASSUMPTIONS: Disbursements: $360 for...

  5. 44 CFR Appendix A to Part 18 - Certification Regarding Lobbying

    Science.gov (United States)

    2010-10-01

    ... 44 Emergency Management and Assistance 1 2010-10-01 2010-10-01 false Certification Regarding Lobbying A Appendix A to Part 18 Emergency Management and Assistance FEDERAL EMERGENCY MANAGEMENT AGENCY... its instructions. (3) The undersigned shall require that the language of this certification...

  6. 32 CFR Appendix A to Part 155 - Additional Procedural Guidance

    Science.gov (United States)

    2010-07-01

    ... Part 155 National Defense Department of Defense OFFICE OF THE SECRETARY OF DEFENSE SECURITY DEFENSE INDUSTRIAL PERSONNEL SECURITY CLEARANCE PROGRAM Pt. 155, App. A Appendix A to Part 155—Additional Procedural... interest to grant or continue a security clearance for an applicant, the case will be promptly referred...

  7. 12 CFR Appendix B to Part 205 - Federal Enforcement Agencies

    Science.gov (United States)

    2010-01-01

    ... ELECTRONIC FUND TRANSFERS (REGULATION E) Pt. 205, App. B Appendix B to Part 205—Federal Enforcement Agencies The following list indicates which Federal agency enforces Regulation E (12 CFR part 205) for... above Federal Trade Commission, Electronic Fund Transfers, Washington, D.C. 20580....

  8. 40 CFR Appendix II to Subpart V of... - Arbitration Rules

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 18 2010-07-01 2010-07-01 false Arbitration Rules II Appendix II to... Subpart V of Part 85—Arbitration Rules Part A—Pre-Hearing Section 1: Initiation of Arbitration Either party may commence an arbitration under these rules by filing at any regional office of the...

  9. 32 CFR Appendix A to Part 636 - References

    Science.gov (United States)

    2010-07-01

    ... 32 National Defense 4 2010-07-01 2010-07-01 true References A Appendix A to Part 636 National...—References Publications and forms referenced in this part may be viewed at the Office of the Provost Marshall... 2507, Notice of Vehicle Impoundment Other References 8 U.S.C. 13. 40 U.S.C. 318a. Memorandum...

  10. 40 CFR Appendix A to Subpart E of... - References

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 5 2010-07-01 2010-07-01 false References A Appendix A to Subpart E of...) AMBIENT AIR MONITORING REFERENCE AND EQUIVALENT METHODS Procedures for Testing Physical (Design) and Performance Characteristics of Reference Methods and Class I and Class II Equivalent Methods for PM2.5...

  11. 40 CFR Appendix A to Subpart F of... - References

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 5 2010-07-01 2010-07-01 false References A Appendix A to Subpart F of...) AMBIENT AIR MONITORING REFERENCE AND EQUIVALENT METHODS Procedures for Testing Performance Characteristics...—References (1) Marple, V.A., K.L. Rubow, W. Turner, and J.D. Spangler, Low Flow Rate Sharp Cut Impactors...

  12. 32 CFR Appendix E to Subpart M of... - References

    Science.gov (United States)

    2010-07-01

    ... 32 National Defense 3 2010-07-01 2010-07-01 true References E Appendix E to Subpart M of Part 552 National Defense Department of Defense (Continued) DEPARTMENT OF THE ARMY MILITARY RESERVATIONS AND...—References Army Regulations referenced in this subpart may be obtained from National Technical...

  13. 32 CFR Appendix to Part 162 - Reporting Procedures

    Science.gov (United States)

    2010-07-01

    ... ENHANCING CAPITAL INVESTMENT (PECI) Pt. 162, App. A Appendix to Part 162—Reporting Procedures A. General The PECI reporting requirements provide the OSD with summary information required to provide program.... (2) DoD Component PECI points of contact should establish identifiers to ensure each project...

  14. 29 CFR Appendix A to Subpart S of... - Decompression Tables

    Science.gov (United States)

    2010-07-01

    ... 29 Labor 8 2010-07-01 2010-07-01 false Decompression Tables A Appendix A to Subpart S of Part 1926...—Decompression Tables 1. Explanation. The decompression tables are computed for working chamber pressures from 0... exposure times for each pressure extending from one-half to over 8 hours inclusive. Decompressions will...

  15. 22 CFR Appendix E to Part 62 - Unskilled Occupations

    Science.gov (United States)

    2010-04-01

    .... E Appendix E to Part 62—Unskilled Occupations For purposes of 22 CFR 514.22(c)(1), the following are... Operators (21) Floorworkers (22) Groundskeepers (23) Guards (24) Helpers, any industry (25) Hotel Cleaners... Cleaners (10) Chauffeurs and Taxicab Drivers (11) Cleaners, Hotel and Motel (12) Clerks, General...

  16. 32 CFR Appendix B to Part 310 - Sample Notification Letter

    Science.gov (United States)

    2010-07-01

    ... 32 National Defense 2 2010-07-01 2010-07-01 false Sample Notification Letter B Appendix B to Part 310 National Defense Department of Defense (Continued) OFFICE OF THE SECRETARY OF DEFENSE (CONTINUED... computer was stolen from the parked car of a DoD employee in Washington, DC after normal duty hours...

  17. 20 CFR Appendix to Subpart D of... - Unknown Title

    Science.gov (United States)

    2010-04-01

    ... LUNG BENEFITS (1969- ) Total Disability or Death Due to Pneumoconiosis Pt. 410, Subpt. D, App. Appendix to Subpart D of Part 410 A miner with pneumoconiosis who meets or met one of the following sets of medical specifications, may be found to be totally disabled due to pneumoconiosis at the pertinent...

  18. 50 CFR Appendix B to Part 404 - Approved VMS

    Science.gov (United States)

    2010-10-01

    ... OF COMMERCE); ENDANGERED SPECIES COMMITTEE REGULATIONS SUBCHAPTER A NORTHWESTERN HAWAIIAN ISLANDS MARINE NATIONAL MONUMENT Pt. 404, App. B Appendix B to Part 404—Approved VMS I. VMS Mobile Transceiver... supports the security and privacy of vessel accounts and messages with the following: (a)...

  19. 40 CFR Appendix J to Subpart A of... - [Reserved

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 17 2010-07-01 2010-07-01 false J Appendix J to Subpart A of Part 82-Parties to the Montreal Protocol Classied Under Article 5(1) That Have Banned the Import of Controlled Products That Rely on Class I Controlled Substances for Their Continuing Functioning Protection of Environment ENVIRONMENTAL PROTECTION AGENCY...

  20. Construction safety program for the National Ignition Facility, Appendix B

    Energy Technology Data Exchange (ETDEWEB)

    Cerruti, S.J.

    1997-06-26

    This Appendix contains material from the LLNL Health and Safety Manual as listed below. For sections not included in this list, please refer to the Manual itself. The areas covered are: asbestos, lead, fire prevention, lockout, and tag program confined space traffic safety.