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Advanced Technology Center - Lockheed MartinLooking at mission requirements from multiple perspectives, we produce robust, innovative solutions that pave the way for pioneering technical achievements, contribute to the body of scientific knowledge and create entirely new capabilities. 1. Lockheed Martin. Space Systems Company. Advanced Technology Center.martin multi helix spiral techniques,Re-configurable multi-level temperature sensing by ultrasonic .This paper introduces a novel technique for multi-level temperature measurement using a single reconfigurable ultrasonic wire waveguide that is configured in the form of a helical spring. In this embodiment, the multiple sensing levels located along the length of the helical waveguide wire can be repositioned by stretching.John Frank
However, the algorithm for image reconstruction remains one of the biggest problems in multi-slice CT. Two helical interpolation methods for single-slice CT, 360LI and 180LI, were used as starting points and extended to multi-slice CT. The extended methods, however, had a serious image quality problem due to the.
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This article reviews an improved methodology and technology for crafting a multi-electrode spiral cuff for the selective activation of nerve fibres in particular superficial regions of a peripheral nerve. The analysis, structural and mechanical properties of the spot welds used for the interconnections between the stimulating.
Looking at mission requirements from multiple perspectives, we produce robust, innovative solutions that pave the way for pioneering technical achievements, contribute to the body of scientific knowledge and create entirely new capabilities. 1. Lockheed Martin. Space Systems Company. Advanced Technology Center.
Nov 15, 2016 . Measurement and Sensor System Techniques, Helmholtzstrasse 18, 01062 Dresden, Germany .. multiple-particle tracking over large axial ranges with tetrapod point spread functions,” Nano Lett. 15(6), 4194– .. double-helix generating phase masks, e.g. the here applied spiral phase mask [28, 29], fork.
This paper introduces a novel technique for multi-level temperature measurement using a single reconfigurable ultrasonic wire waveguide that is configured in the form of a helical spring. In this embodiment, the multiple sensing levels located along the length of the helical waveguide wire can be repositioned by stretching.
Mar 3, 2014 . spiral, whose structures and aspect ratios are similar. Natural transition orbitals (NTOs)50 provide an efficient means to combine, in an efficient orbital form, the multiple particle–hole molecular orbital pairs which make up a single excitation in TDDFT calculations. With this method, we may probe the.
Purpose: Multi-slice computed tomography (MSCT) is an emerging technique for the angiographic assessment of coronary artery disease (CAD). . with chronic ischemic heart disease (CIHD) were imaged for CAD using a contrast-enhanced retrospective electrocardiographic-gated spiral technique on a MSCT scanner.
May 31, 2016 . mists have approached particular issues, such as single burials, commingled multiple depositions, cannibalism, and the .. Yorkshire (UK), c) peri-mortem fracture of femur, Neolithic period, Scaloria Cave, Italy; note helical/spiral fracture outline, sharp fracture margin and smooth fracture surface; d) dry.
Apr 5, 2016 . Christina J. Naify,1, a) Charles A. Rohde,1 Theodore P. Martin,1 Michael Nicholas,1. Matthew D. Guild,2 and . spiral phase plates1,5, metasurfaces6, and gratings7 require separate apertures to generate each mode. . Using the simple leaky wave aperture, we have realized a versatile, multi-mode vortex.
Ghia, K., Ghia, U., and Shin, C., 1987, “Study of Fully Developed Incompressible Flow in Curved Ducts, Using a Multi-Grid Technique,” ASME J. Fluids Eng., 109, . Chowdhury, K., Linkmeyer, H., Bassiouny, M., and Martin, H., 1985, “Analytical Studies on the Temperature Distribution in Spiral-Plate Heat Exchanger,” Chem.
Oct 1, 2004 . Helical CT angiography is a noninvasive volumetric imaging technique. Images can be relatively safely obtained without the need for arterial puncture or catheter manipulation. CT angiography is not associated with significant patient risks other than those associated with the administration of iodinated.
Lower extremity spiral CT angiography versus catheter angiography. Radiology, 194 (1995), pp. 903-908. 3. GD Rubin, MC Shiau, AN Leung, et al.Aorta and iliac arteries: Single versus multiple detector-row helical CT angiography. Radiology, 215 (2000), pp. 670-676. 4. FG FowkesEpidemiology of peripheral vascular.
B. Brain Imaging. CT brain imaging may be performed with a sequential single-slice technique, multislice helical (spiral) protocol, . For imaging of the cranial base, an axial slice thickness as thin as possible, but no greater than 3 mm with spiral techniques and 2 mm .. Single- versus multi-detector row CT of the brain:.
Dec 26, 2015 . undergone middle ear surgery, three-dimensional spiral computed tomography (CT) scan plays an important role in optimizing surgical . difference was observed between the findings of the two methods in ossicle destruction (6.5% conventional CT vs. ... post-processing of helical multi-slice CT data].
Jul 28, 2009 . care dose 4D. Material and methods: Medical records of unenhanced multi-slice computed tomography (MSCT) . tomography in suspected urinary calculi—with dose reduction method (care dose 4D), Journal of . toward unenhanced helical/spiral CT examination in evaluation of acute flank pain replacing.
multi-point probes, spatially averaged measurement techniques, or . enhancement techniques for use in a H2/Air pulsed-detonation engine .. time scale, and inherent variability in DDT timing prevents a priori phase-locking of the high-speed camera and PDE control system. Results. Shchelkin Spiral. The detonation.
Each row of seven air-cooled cylinders possessed a slight angular offset from the previous, forming a semi-helical arrangement to facilitate effective airflow cooling of the cylinder rows behind them, inspiring the engine's "corncob" nickname. A mechanical supercharger geared at 6.374:1 ratio to engine speed provided.
Fabrication Methods. The choice of fabrication method depends mainly on the raw material form used. Wires can be formed into stents in various ways using conventional wire forming . multiple Elgiloy (a cobalt based alloy) wires. This allows continuous .. A minimally connected helical spiral stent fabricated from stainless.