نتایج جستجو برای: spiral like function

تعداد نتایج: 1807564  

2012
Kosuke Matsubara Haruka Koshida Keita Sakuta Tadanori Takata Junsei Horii Hiroji Iida Kichiro Koshida Katsuhiro Ichikawa Osamu Matsui

One-hundred-and-twenty-eight-section dual X-ray source computed tomography (CT) systems have been introduced into clinical practice and have been shown to increase temporal resolution. Higher temporal resolution allows low-dose spiral mode at a high pitch factor during CT coronary angiography. We evaluated radiation dose and physical image qualities in CT coronary angiography by applying high-p...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2001
S K Das S Puri M C Cross

We present a detailed analytical and numerical study of nonequilibrium dynamics for the complex Ginzburg-Landau equation. In particular, we characterize evolution morphologies using spiral defects. This paper is the first in a two-stage exposition. Here, we present analytical results for the correlation function arising from a single-spiral morphology. We also critically examine the utility of ...

Journal: :Applied Physics Letters 2022

Polar topologies in ferroelectric/paraelectric superlattices have been an important substance to explore exotic physical properties. Although enormous efforts paid this field, the universality of formation polar various and their electric field dynamics is still unknown. Herein, we employ a phase-field model construct three types with tetragonal, rhombohedral, orthorhombic symmetries investigat...

Journal: :Biomedizinische Technik. Biomedical engineering 2013
Andreas Wille Mohamed Sangaré Susanne Winter

Tremor analysis is a common task in diagnosis of movement disorders. In this paper, we present a new method for an automated classification of tremor strength based on digitized spiral drawings. We used statistical measurements on relative line orientations, which are calculated on the full image. Therefore, this approach is insensitive to drawing errors (like line crossings or missing line par...

1997
D. Moss M. Korpi P. Rautiainen H. Salo

Wemodel the evolution of dynamomaintained magnetic fields in a barred spiral galaxy. The velocity fields are taken from N-body dynamical simulations. The important feature is the presenceof strong, unsteadynon-circular gasmotions, driven by the central bar, The nonlinear dynamo calculations are carried out with both two dimensional (thin disc approximation) and three dimensional codes. The resu...

1998
I. F. Mirabel O. Laurent D. B. Sanders M. Sauvage M. Tagger V. Charmandaris L. Vigroux P. Gallais C. Cesarsky D. L. Block

We report observations at mid-infrared and sub-millimeter wavelengths of Centaurus A (Cen A, NGC 5128), the giant elliptical galaxy that harbors the closest radio loud Active Galactic Nucleus (AGN) to Earth. The dust emission from the deep interior of Cen A reveals a bisymmetric structure with a diameter of 5 (5 kpc), centred at the AGN. This structure is remarkably similar to that of a barred ...

1983
L de Arcangelis

We consider the spiral self-avoiding walk model recently introduced by Privman. On the basis of an analogy with the partitioning of the integers, we argue that the number of N-step spiral walks should increase asymptotically as pJN with p a constant, leading to an essential singularity in the generating function. Enumeration data to 65 terms indicates, however, that c , apparently varies as pNn...

2000
Riccardo Giovanelli Martha P. Haynes Luis E. Campusano

The environmental dependencies of the characteristics of spiral galaxy rotation curves are studied in this work. We use our large, homogeneously collected sample of 510 cluster spiral galaxy rotation curves to test the claim that the shape of a galaxy’s rotation curve strongly depends on its location within the cluster, and thus presumably on the strength of the local intracluster medium and on...

2008
Jeroen M. Stil Rainer Beck Russell Taylor

We present integrated polarization properties of nearby spiral galaxies at 4.8 GHz, and models for the integrated polarization of spiral galaxy disks as a function of inclination. Spiral galaxies in our sample have observed integrated fractional polarization in the range . 1% to 17.6%. At inclinations less than 50 degrees, the fractional polarization depends mostly on the ratio of random to reg...

2017
Peng Han Rui Zhang Ying Gao Xiaorong Niu Zichen Chen Qing Zhang Min Xu

Fibroblast Growth Factor 8 (FGF8) plays a critical role in promoting the growth of axons in the brain, and it may also be a potentially important regulatory factor in the auditory system. However, no report has yet studied the expression patterns of FGF8 in spiral ganglions. Therefore, we evaluated the expressions of FGF8 and its receptors in the spiral ganglion of rats’ cochleae using immunocy...

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