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A W-Band backward-wave oscillator based on planar helix slow wave structure
Published 2020“…The BWO is based on a microfabrication-compatible planar helix slow wave structure with straight-edge connections (PH-SECs). The oscillator is designed to operate with a beam current of 20 mA and a beam voltage varying from 7 kV to 11 kV. …”
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Journal Article -
22
Wideband Power Combining of Four Microfabricated W-Band Traveling-Wave Tubes
Published 2018“…The proposed TWTs are based on a planar helix slow-wave structure (SWS) with straight-edge connections (PH-SEC) that can be microfabricated with stripline input-output feed. …”
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Journal Article -
23
Lane detection system for autonomous vehicle using image processing techniques
Published 2005“…For the detection of the straight edge lines, a Radon based method was chosen. …”
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Thesis -
24
Diagnostic Value of Connective Tissue Disease Related CT Signs in Usual Interstitial Pneumonia Pattern of Interstitial Lung Disease
Published 2023-01-01“…The anterior upper lobe (AUL) sign, exuberant honeycombing (EHC), and straight edge (SE) sign are recently described computed tomography (CT) signs in CTD-related UIP. …”
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25
The usual Interstitial pneumonia pattern in autoimmune rheumatic diseases
Published 2023-12-01“…From a diagnostic point of view, a UIP pattern related to ARDs may display imaging and pathological features able to distinguish it from that related to IPF, such as the “straight-edge” sign at HRCT and lymphoplasmacytic infiltrates at histologic specimens. …”
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26
Sensitivity Analysis of Various Geometries of PCD and Cemented Tungsten Carbide Cutting Tools during the Milling of GFRP Composite
Published 2022-04-01“…The results indicate that the PCD tool with the straight edge, inclined peripheral tooth shape produces the smallest total cutting force and less delamination (shortest and lowest number of delaminated fibres) at both fresh and worn states. …”
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Article -
27
Alternative Bi precursor effects on the structural, optical, morphological and photocatalytic properties of BiOI nanostructures
Published 2020-01-01“…Another notable difference was observed in the resulting morphology, where ∼1.6 μ m flower- and dandelion-like shapes were obtained for acetate and subsalicylate, respectively; both structures assembled by around 30 nm thick nanoflakes with rounded and straight edge, respectively. UV–vis diffuse reflectance shows an energy gap around 1.8 eV. …”
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The rocking dynamics of rigid right prisms with regular polygonal bases
Published 2021“…However, objects with curved geometry exhibit motions that are defined as rolling about their edges; a motion which does not result in loss of energy as is seen during transitions between vertices of a straight edge at impact. Therefore, the importance of using an accurate geometric representation of objects with curved geometry is examined. …”
Conference item -
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Application of planar helix slow-wave structure in backward-wave oscillators
Published 2020“…Planar helix slow-wave structure with straight-edge connections (PH-SEC) is a planar counterpart of circular helix SWS which is one of the most popular SWS for TWTs. …”
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Thesis-Doctor of Philosophy -
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Planar helix-based slow-wave structures for millimeter wave traveling-wave tubes
Published 2016“…In this context, during the last few years, a planar helix SWS with straight-edge connections (PH-SEC) has been proposed and studied. …”
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Thesis -
31
High-resolution electron microscopy of dislocation geometries
Published 1975“…Chapter 2. discusses the anisotropic theory of infinite straight dislocations as given by Stroh (1958); the only defects considered here are those for which this infinite straight approximation is reasonable, e.g. the partial dislocations in a faulted dipole, or the dissociated straight edge of a very large loop.</p> <p>Chapter 3 applies the weak-beam technique to the study of faulted dipoles in copper and it is shown that such images define the dipole geometry with a greater accuracy than hitherto possible using conventional techniques. …”
Thesis -
32
What Is a Polygonal Impact Crater? A Proposed Framework Toward Quantifying Crater Shapes
Published 2023-07-01“…The PIC literature is scant, but almost exclusively these craters are identified manually, and the potentially straight edges are classified and measured manually. The reliance on human subjectivity in both the identification and measurement motivated us to design a more objective algorithm to fit the crater rim shape, measure any straight edges, and measure joint angles between straight edges. …”
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Article -
33
Computer Recognition of Prismatic Solids
Published 2023“…The goal is to study algorithms which find the real straight edges in the scenes, taking into account smooth variations in intensity over faces of the solids, blurring of edges and noise.…”
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34
On the vortex structures and flow characteristics of circular and elliptic jet impingement upon convex cylinders
Published 2016“…Moreover, as the relative curvature decreases, the locations for the previous key vortical behaviours are delayed further along the cylinder convex surfaces, but closer to the impingement point along the cylinder straight-edges. Interestingly, vortex-dipoles along the cylinder straight-edges demonstrate a strong tendency to travel upstream and interact with other upstream neighbours at separation distance H/d = 4. …”
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Thesis -
35
Research on the Influence of the Assembly Parameters of the Junction Surface of Ultrasonic Acoustic Components on the Acoustic Performance Parameters
Published 2022-10-01“…The optimal assembly parameters of the junction surface of the ultrasonic horn and the straight-edged knife were determined through the measurement and analysis of the dynamic performance parameters of the two junction surfaces. …”
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Article -
36
Numerical Simulation on the Hydrodynamic Flow Performance and an Improve Design of a Circulating Water Channel
Published 2022-03-01“…The obtained results show that the wing-type turning vane with appropriate straight-edged length can help to improve the velocity uniformity of the flow field. …”
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37
Image Denoising Using Hybrid Transforms
Published 2007-05-01“…In this paper a new family of transformation for image denoising ispresented, Multiridgelet and Walidlet transforms, which have been proposedas alternatives to Discrete Wavelet and Multiwavelet transforms.Walidlet transform is an intelligent tool for solving image processingproblems such as image denoising with straight edges, the general algorithmof image denoising using discrete multiwavelet transform is introduced, thenfollowed by the general algorithm of image denoising using Walidlettransform that is proposed here in order to achieve better results than that forWalidlet thresholding, finally, a comparative study is presented to show thedifferences between a mentioned algorithms.…”
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Article -
38
Theory of shape-shifting droplets
Published 2017“…Recent studies of cooled oil emulsion droplets uncovered transformations into a host of flattened shapes with straight edges and sharp corners, driven by a partial phase transition of the bulk liquid phase. …”
Journal article -
39
GRAPHIC MODELING OF A DRILLING FIXTURE AS A PART OF EMCO MILL 55 CNC MILLING AND DRILLING SYSTEM
Published 2016-11-01“…Moreover, a double- straight edged helical drill used for the drilling process was modeled in CATIA environment.…”
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40
GRAPHIC MODELING OF A DRILLING FIXTURE AS A PART OF EMCO MILL 55 CNC MILLING AND DRILLING SYSTEM
Published 2016-11-01“…Moreover, a double- straight edged helical drill used for the drilling process was modeled in CATIA environment.…”
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Article