Signatures of braking surface targets in spotlight synthetic aperture radar

The article of record as published may be found at http://dx.doi.org/10.1109/SSPD.2014.6943314This paper examines the signature characteristics in spotlight synthetic aperture radar (SAR) image data for surface targets that are executing braking maneuvers during the SAR collection. This analysis considers the special case in which the radar sensor is assumed to move with constant speed and heading on a level flight path with broadside imaging geometry. The analysis concentrates on the target migration effects in which the moving target smear exhibits some defocus in the range direction, although much smaller in magnitude than the smearing in the radar cross-range direction. This paper focuses on the case of a target that executes a rapid speed transition by decreasing its speed within the synthetic aperture. The SAR simulations are shown to give signatures that are in agreement with the predicted shapes

Implications of SAR ambiguities in estimating the motion of slow targets

The article of record as published may be found at http://dx.doi.org/10.1117/12.2263096This paper examines the implications pertaining to the problem of attempting to invert synthetic aperture radar (SAR) measurement data to yield unique estimates of the underlying motion of slow targets in the imaged scene. A recent analysis has demonstrated that ambiguities exist in estimating the kinematics parameters of surface targets for general bistatic SAR collection data. In particular, a procedure has been developed which generates alternate target trajectories which give the same SAR measurements as that of the true target motion. The current paper extends the earlier analysis by generating specific numeric examples of alternate target trajectories corresponding to the motion of a given slowly moving target. This slow-target case reveals the counter-intuitive result that a single SAR collection data set can be generated by target trajectories with significantly different, and possibly opposing, heading directions. For example, the true motion of a given target can be moving towards the mean radar position during the SAR collection interval, whereas a valid alternate trajectory can correspond to a target that is moving away from the radar. The present analysis demonstrates the extent of the challenges associated with attempting to estimate of the underlying motion of targets using SAR measurement data.AFRL for partial sponsorshi

Magnetic field strength of toroidal plasma equilibria

The goal of nuclear fusion research is to confine a deuterium-tritium plasma at a sufficiently high temperature (15 keV) and density (3 $\times$ 10\sp{20} m\sp{-3}) for a sufficient length of time (1 sec) to produce net fusion power. One means to attain the required plasma confinement is to embed the plasma within a magnetic field. The global structure of this magnetic field determines the variation of magnetic field strength within the surfaces of constant plasma pressure. This field strength variation in turn determines many of the stability and confinement properties of the plasma. This dissertation gives the first detailed exposition of the spectrum of possible forms for magnetic field strength corresponding to toroidal plasma equilibria, both within any three-dimensional volume and within any two-dimensional surface of constant plasma pressure. Constraints due to the toroidicity of the configuration and the divergence-free property of the magnetic field are found to limit the form of the field strength. Three-dimensional stellarator equilibria corresponding to a particular form of the magnetic field strength are especially interesting. These quasi-helically symmetric equilibria are non-axisymmetric, toroidal configurations in which the magnetic field strength depends on only one angular coordinate, instead of two, within the constant plasma pressure surfaces. Unlike conventional stellarator equilibria, these quasi-helically symmetric equilibria exhibit the favorable confinement properties of axisymmetric tokamak equilibria. We show that stellarators with exact quasi-helical symmetry do not to exist, but that good approximations can be found

Communication Device Radiating Purely Dipole Structure

The invention relates to a communication device radiating a purely dipole structure. The communication device included a metallic sphere having a central axis and electrical wiring wound azimuthally around the central axis of the metallic sphere so that an electric current density of the electric wiring is proportional to a sine of a spherical elevation angle of the metallic sphere

READ @your library David A. Garren (bookmark)

A project of the Dudley Knox Library at the Naval Postgraduate School

Aesculapius: Adding a Dimension of Instruction Through Integrating Spatial Knowledge

Objective: A proof-of-concept for a platform designed to provide simulations modeling, in three dimensions, anatomical pathology/dysfunctions(as defined by osteopathic diagnostic criteria). Design/Methods: Data from a two dimensional Computerized Tomography (CT) image stack, uploaded to the Amira software, was analyzed and interpolated (slice-by-slice) to render individual three-dimensional bones and muscles. These data were used to construct educational simulations of kinetic three-dimensional movements—movements that are most often taught to be manifestations of musculoskeletal pathology in osteopathic medical schools in the United States. The movements modeled were: forward and backward rotation of the left innominate, and Fryette motion (Type I and Type II) in the first and second lumbar vertebrae. The rotation of the left innominate was paired with muscular attachments to a static right innominate, femur, and sacrum. The attachments are used as a reference to better demonstrate the etiology of bony dysfunctions caused by muscular hypertonicity in the lower limbs. The narrated simulations were uploaded unto the Sketchfab website as hyperlinks and plotted unto a spatially manipulatable, three dimensional, static, skeletal model of pathology. The plotted points hold information relevant to the pathology at bony landmarks with links to recordings of the techniques used to treat the pathology. The techniques are modeled and explained by medical students at Marian University College of Osteopathic Medicine (MUCOM). Results: three dimensional models of dysfunctions that are represented statically, three dimensional models of dysfunctions that are represented kinetically with narration, and human models that describe and portray the techniques used to treat the dysfunction. Conclusions: the proof-of-concept elucidates the merit of utilizing the technology available, to aid in a restructured adjunctive approach to early osteopathic training. modeling, in three dimensions, anatomical pathology/dysfunctions(as defined by osteopathic diagnostic criteria). Design/Methods: Data from a two dimensional Computerized Tomography (CT) image stack, uploaded to the Amira software, was analyzed and interpolated (slice-by-slice) to render individual three-dimensional bones and muscles. These data were used to construct educational simulations of kinetic three-dimensional movements—movements that are most often taught to be manifestations of musculoskeletal pathology in osteopathic medical schools in the United States. The movements modeled were: forward and backward rotation of the left innominate, and Fryette motion (Type I and Type II) in the first and second lumbar vertebrae. The rotation of the left innominate was paired with muscular attachments to a static right innominate, femur, and sacrum. The attachments are used as a reference to better demonstrate the etiology of bony dysfunctions caused by muscular hypertonicity in the lower limbs. The narrated simulations were uploaded unto the Sketchfab website as hyperlinks and plotted unto a spatially manipulatable, three dimensional, static, skeletal model of pathology. The plotted points hold information relevant to the pathology at bony landmarks with links to recordings of the techniques used to treat the pathology. The techniques are modeled and explained by medical students at Marian University College of Osteopathic Medicine (MUCOM). Results: three dimensional models of dysfunctions that are represented statically, three dimensional models of dysfunctions that are represented kinetically with narration, and human models that describe and portray the techniques used to treat the dysfunction. Conclusions: the proof-of-concept elucidates the merit of utilizing the technology available, to aid in a restructured adjunctive approach to early osteopathic training

Visualization of coral host--pathogen interactions using a stable GFP-labeled Vibrio coralliilyticus strain

The bacterium Vibrio coralliilyticus has been implicated as the causative agent of coral tissue loss diseases (collectively known as white syndromes) at sites across the Indo-Pacific and represents an emerging model pathogen for understanding the mechanisms linking bacterial infection and coral disease. In this study, we used a mini-Tn7 transposon delivery system to chromosomally label a strain of V. coralliilyticus isolated from a white syndrome disease lesion with a green fluorescent protein gene (GFP). We then tested the utility of this modified strain as a research tool for studies of coral host–pathogen interactions. A suite of biochemical assays and experimental infection trials in a range of model organisms confirmed that insertion of the GFP gene did not interfere with the labeled strain’s virulence. Using epifluorescence video microscopy, the GFP-labeled strain could be reliably distinguished from non-labeled bacteria present in the coral holobiont, and the pathogen’s interactions with the coral host could be visualized in real time. This study demonstrates that chromosomal GFP labeling is a useful technique for visualization and tracking of coral pathogens and provides a novel tool to investigate the role of V. coralliilyticus in coral disease pathogenesis.Human Frontier Science Program (Strasbourg, France) (No. RGY0089RS

MadGraph/MadEvent v4: The New Web Generation

We present the latest developments of the MadGraph/MadEvent Monte Carlo event generator and several applications to hadron collider physics. In the current version events at the parton, hadron and detector level can be generated directly from a web interface, for arbitrary processes in the Standard Model and in several physics scenarios beyond it (HEFT, MSSM, 2HDM). The most important additions are: a new framework for implementing user-defined new physics models; a standalone running mode for creating and testing matrix elements; generation of events corresponding to different processes, such as signal(s) and backgrounds, in the same run; two platforms for data analysis, where events are accessible at the parton, hadron and detector level; and the generation of inclusive multi-jet samples by combining parton-level events with parton showers. To illustrate the new capabilities of the package some applications to hadron collider physics are presented: 1) Higgs search in pp \to H \to W^+W^-: signal and backgrounds. 2) Higgs CP properties: pp \to H jj$in the HEFT. 3) Spin of a new resonance from lepton angular distributions. 4) Single-top and Higgs associated production in a generic 2HDM. 5) Comparison of strong SUSY pair production at the SPS points. 6) Inclusive W+jets matched samples: comparison with the Tevatron data.Comment: 38 pages, 15 figure

Crop Updates 2006 - Katanning

This session covers sixteen papers from different authors 2006 SEASONAL OUTLOOK, David Stephens and Michael Meuleners, Department of Agriculture Review of climate model summaries reported in the Department of Agriculture’s growing season outlooks, Meredith Fairbanks, Department of Agriculture Farmers commodity outlook 2006, Thomas Schulz, Department of Agriculture Why is salinity such a difficult problem for plant breeders? T J Flowers, TD Colmer, University of Western Australia Matching nitrogen supply to wheat demand in 2005, Narelle Simpson, Ron McTaggart, Wal Anderson, Lionel Martin and Dave Allen, Department of Agriculture Wheat varieties in 2006, Brenda Shackley, Department of Agriculture Performance of dwarf potential milling oat varieties in Western Australian environments, Raj Malik and Kellie Winfield, Department of Agriculture Field pea lessons for 2006, Rodger Beermir, Department of Agriculture Better returns from Durum wheat, Shahahan Miyan, Department of Agriculture Summer weeds can reduce grain yield and protein, Dr. Abul Hashem, Department of Agriculture, Dr Shahab Pathan, Department of Agriculture, Vikki Osten, Queensland Department of Primary Industries and Fisheries Management of Summer Weeds, Alex Douglas, Department of Agriculture Frost or Friction, Garren Knell, Steve Curtin, Wade Longmuir, Consult Ag Pty Ltd PROFITING FROM MARGINAL LAND SEMINAR Producing Bio-Diesel and rubber from marginal land?? Dr Henry Brockman, Department of Agriculture SGSL Producer network – on ground implementation of saltbush based pastures, Justin Hardy, Arjen Ryder, John Paul Collins and Jessica Johns, Department of Agriculture Enhancing the profitability of “Edenia” using saltbush and perenials, SGSL Producer case study, John Pepall, Jinka’s Hill LCDC Investment in saltland pastures, Allan Herbert, Department of Agricultur