Results 101 to 110 of about 1,580,311 (297)

Cosmic velocity fields and their interpretation [PDF]

Proceedings of the National Academy of Sciences, 1998
We review the current status of our knowledge of cosmic velocity fields, on both small and large scales. A new statistic is described that characterizes the incoherent, thermal component of the velocity field on scales less than 2 h −1 Mpc ( h is H 0
openaire   +2 more sources

Adult‐Onset Subacute Sclerosing Panencephalitis Presenting With Subacute Cognitive Deficits

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT We describe the case of a 41‐year‐old man diagnosed with adult‐onset subacute sclerosing panencephalitis (SSPE). The patient presented with subacute progressive cognitive deficits and a neuropsychological profile indicating predominant frontoparietal dysfunction. MRI showed only mild parietal‐predominant cerebral atrophy.
Dennis Yeow, Nicola McKern, Vincent Oxenham, Kate Ahmad, Omar Ahmad   +4 more
wiley   +1 more source

The computation of the velocity field [PDF]

Proceedings of the Royal Society of London. Series B. Biological Sciences, 1984
The organization of movement in the changing retinal image provides a valuable source of information for analysing the environment in terms of objects, their motion in space, and their three-dimensional structure. A description of this movement is not provided to our visual system directly, however; it must be inferred from the pattern of changing ...
openaire   +2 more sources

Three-Dimensional Relativistic Magnetohydrodynamic Simulations of Current-Driven Instability with A Sub-Alfvenic Jet: Temporal Properties

, 2011
We have investigated the influence of a velocity shear surface on the linear and non-linear development of the CD kink instability of force-free helical magnetic equilibria in 3D.
Aloy, Anile, Antón, Appl, Bateman, Baty, Beckwith, Begelman, Blandford, Blandford, Bromberg, Carey, De Villiers, De Villiers, Georganopoulos, Gómez, Hardee, Hawley, Istomin, Istomin, Ken-Ichi Nishikawa, Lery, Lyubarsky, McKinney, Mizuno, Mizuno, Mizuno, Mizuno, Mizuno, Mészáros, Nakamura, Nakamura, Narayan, Ouyed, Philip E. Hardee, Weisskopf, Yosuke Mizuno   +36 more
core   +1 more source

Current Tracking Adaptive Control of Brushless DC Motors

International Journal of Adaptive Control and Signal Processing, EarlyView.
In this paper, the current tracking for Brushless Direct Current motors is approached considering uncertainty in the parameters of the motor's model. An adaptive control scheme to compensate electrical parameters uncertainty is proposed without requiring any knowledge of the mechanical parameters.
Fernanda Ramos‐García, Axel Coronado‐Andrade, Gerardo Espinosa‐Pérez, Luis Alvarez‐Icaza   +3 more
wiley   +1 more source

Bistable Mechanisms 3D Printing for Mechanically Programmable Vibration Control

Advanced Engineering Materials, EarlyView.
This work introduces a 3D‐printed bistable mechanism integrated into tuned mass dampers (TMDs) for mechanically adaptive passive vibration suppression. Through optimized geometry, the bistable design provides adaptable vibration reduction across a broad range of scenarios, achieving effective vibration mitigation without complex controls or external ...
Ali Zolfagharian, Frédéric Demoly, Mohammad Lakhi, Bernard Rolfe, Mahdi Bodaghi   +4 more
wiley   +1 more source

Study of vortex state of the atmosphere

Наука. Инновации. Технологии, 2022
The earth's atmosphere as a whole has a very complex system of movements, changing over time. The main features of these movements from year to year are repeated and are well represented on medium and climate maps, which are the source for conclusions ...
Julia Alexandrovna Semenova, Robert Gurgenovich Zakinayn, Julia Leontievna Smerek, Nina Evgenevna Danilova, Arthur Robertovich Zakinayn   +4 more
doaj  

The Equivalence of the Lagrangian-Averaged Navier-Stokes-{\alpha} Model and the Rational LES model in Two Dimensions

, 2011
In the Large Eddy Simulation (LES) framework for modeling a turbulent flow, when the large scale velocity field is defined by low-pass filtering the full velocity field, a Taylor series expansion of the full velocity field in terms of the large scale ...
Bouchet, Freddy, Nadiga, Balasubramanya T.   +1 more
core   +1 more source

Enhancing Corrosion Resistance and Mechanical Strength of 3D‐Printed Iron Polylactic Acid for Marine Applications via Laser Surface Texturing

Advanced Engineering Materials, EarlyView.
Laser surface texturing significantly improves the corrosion resistance and mechanical strength of 3D‐printed iron polylactic acid (Ir‐PLA) for marine applications. Optimal laser parameters reduce corrosion by 80% and enhance tensile strength by 25% and ductility by 15%.
Mohammad Rezayat, Mojtaba Karamimoghadam, Mohammadreza Lalegani Dezaki, Ali Zolfagharian, Giuseppe Casalino, Antonio Mateo, Mahdi Bodaghi   +6 more
wiley   +1 more source

Numerical modeling and experimental research of a two-phase liquid- gas ejector with a profiled supersonic nozzle

Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2017
A two-phase liquid-gas ejector with a supersonic nozzle is described in the article. The results of numerical modeling of the processes occurring in it and forming a two-phase jet are presented. The structure of a two-phase flow formed by the ejector and
I. A. Lepeshinsky, V. A. Reshetnikov, I. A. Zarankevich   +2 more
doaj   +1 more source