نتایج جستجو برای: jets

تعداد نتایج: 14822  

2013
ELIZABETH A. BARNES LORENZO POLVANI

This work documents how the midlatitude, eddy-driven jets respond to climate change using model output from phase 5 of the Coupled Model Intercomparison Project (CMIP5). The authors consider separately the North Atlantic, the North Pacific, and the Southern Hemisphere jets. The analysis is not limited to annualmean changes in the latitude and speed of the jets, but also explores how the variabi...

2007
Philippe A. Bonnefoy John Hansman

Very light jets constitute a class of three to eight passenger turbofan-powered aircraft thatwill enter service in 2006 and will need to be integrated into the National Airspace System. An aircraft performance analysis showed similarities between the predicted performance and capabilities of very light jets and the performance of existing light jets. Based on this, an analysis of operating patt...

2011
Kaushik Srinivasan W. R. Young

Zonostrophic instability leads to the spontaneous emergence of zonal jets on a β-plane from a jetless basic-state flow which is damped by bottom drag and driven by a random body force. Decomposing the barotropic vorticity equation into the zonal-mean and eddy equations, and neglecting the eddyeddy interactions, defines the quasi-linear (QL) system. Numerical solution of the QL system shows zona...

Journal: :Echocardiography 2001
G S Levi S F Bolling D S Bach

A strong association has been recognized between partial or complete mitral leaflet flail and highly eccentric mitral regurgitation jets. In light of anecdotal observation of eccentric mitral regurgitation apparently due to geometric and functional changes accompanying inferior wall myocardial infarction, the present study was performed to systematically study the eccentricity of mitral regurgi...

2009
Grégory Soyez G. Soyez

In all modern hadronic colliders, jets recieve a large contribution from a soft background: pileup in the case of proton-proton collisions at the LHC, or the underlying event for heavy-ion collisions at RHIC or the LHC. In these proceedings, we present a generic and simple method, based on jet areas, to subtract the contribution of the soft background from the jets. This allows for more precise...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2006
K V Edmond A B Schofield Manuel Marquez J P Rothstein A D Dinsmore

We demonstrate formation of long-lived cylindrical jets of a viscoelastic fluid using hydrodynamic focusing. A solution of polyacrylamide in water is driven coaxially with immiscible oil and subjected to strong extensional flow. At high flow rates, the aqueous phase forms jets that are 4-90 microm in diameter and several centimeters long. The liquid surfaces of these jets are then used as templ...

1995
Wolfgang Ochs Jacek Wosiek

Angular correlations of partons have been derived for high energy jets in QCD. Interesting new scaling properties with two redundant variables (jet energy P and jet opening angle Θ) emerge which can be tested within a parton-hadron duality picture. Recent results from LEP support the scaling in Θ; the scaling in both P and Θ could be tested with jets from deep inelastic scattering or with high ...

2007
Noam Soker

I discuss recent observations of asymmetries in Doppler shifts across T Tauri jets, and argue that the observed asymmetric velocity shifts and gradients do not indicate jet rotation. These observations, therefor, cannot be used as a support of a magnetized disk wind. The interaction of the jets with a twisted-tilted (wrapped) accretion disk (or the variable velocity precessing model) accounts b...

2004
MATTHEW WING

The substructure of jets has been studied in terms of the jet shape and subjet multiplicity and these quantities used to tag gluonand quark-initiated jets. Cross sections are presented for gluonand quark-tagged jets which exhibit the expected behaviour of the underlying parton dynamics. The value of αs(MZ ) of αs(MZ ) = 0.1176 ± 0.0009(stat.) +0.0009 −0.0026 (exp.) −0.0072 (th.) was extracted f...

Journal: :J. Sci. Comput. 2005
Youngsoo Ha Carl L. Gardner Anne Gelb Chi-Wang Shu

Computational fluid dynamics simulations using the WENO-LF method are applied to high Mach number nonrelativistic astrophysical jets, including the effects of radiative cooling. Our numerical methods have allowed us to simulate astrophysical jets at much higher Mach numbers than have been attained (Mach 20) in the literature. Our simulations of the HH 1-2 astrophysical jets are at Mach 80. Simu...

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