نتایج جستجو برای: polarised target

تعداد نتایج: 400491  

2001
L. C. Garcia de Andrade

Spin-Polarised cylinders with and without axial magnetic fields are obtained as particular families of solutions of Einstein-Cartan gravity (EC).The first solution represents a spin-polarised cylinder in teleparallel gravity.The second solution is a magnetized solution representing a spin-polarised cylinder where the magnetic fields and spins are distributed along the infinite axis of the cylin...

2001
J. Delabrouille

The Planck High Frequency Instrument (HFI) is the most sensitive instrument currently being built for the measurement of Cosmic Microwave Background anisotropies. In addition to unprecendented sensitivity to CMB temperature fluctuations, the HFI has polarisation-sensitive detectors in 3 frequency channels (143, 217 and 353 GHz), which will constrain full-sky polarised emission of the CMB and fo...

2004
B. van den Brandt H. Glättli H. W. Grießhammer P. Hautle J. Kohlbrecher J. A. Konter

The understanding of few-nucleon systems at low energies is essential, e.g. for accurate predictions of element abundances in big-bang and stellar fusion. Novel effective field theories, taking only nucleons, or nucleons and pions as explicit degrees of freedom, provide a systematic approach, permitting an estimate of theoretical uncertainties. Basic constants parameterising the short range phy...

1999
E. M. Kabuß

New experiments in polarised deep inelastic scattering will mainly concentrate on the measurement of semi-inclusive asymmetries. Especially, the upgraded HERMES experiment at DESY and the newly build COMPASS experiment at CERN will investigate the gluon polarisation via open charm and high pT hadron pair production , study in detail the flavour decomposition of the quark helicity distributions ...

2000
D. M. Alexander

An optical spectropolarimetric study has shown that the detectability of polarised broad Hα in Seyfert 2 galaxies is correlated to the IRAS f 60 /f 25 flux ratio where only those Seyfert 2s with " warm " IRAS colours show polarised broad line emission. It was suggested that those Seyfert 2s with " cool " IRAS colours have highly inclined tori which obscure the broad line scattering screen. I pr...

1997
G. Rädel A. De Roeck M. Maul

We present a possible direct measurement of the polarised gluon density ∆G(x) in LO from di-jet production in polarised deep inelastic ep scattering, assuming the kinematics of the HERA collider. We show the sensitivity to the x-dependence of ∆G(x) and to the first moment ∫ ∆G(x)dx in the range 0.002 < x < 0.2, assuming the electron and proton beam of HERA being polarised to 70% and an integrat...

2002
M. A. ROCCA

ARP Angle Resolved Photoemission DFT Density Functional Theory FT Frustrated Translation HATOF He Atoms Time of Flight HREELS High Resolution Electron Energy Loss Spectroscopy IRAS Infrared Reflection Absorption Spectroscopy L Longitudinally polarised mode LDA Local Density Approximation LDM Lattice Dynamical Model LEED Low Energy Electron Diffraction ML Monolayer NEXAFS Near Edge X-rays Absorp...

Journal: :Development 2006
Bernhard Strauss Richard J Adams Nancy Papalopulu

The process of oriented divisions of polarised cells is a recurrent mechanism of cell fate diversification in development. It is commonly assumed that a specialised mechanism of spindle alignment into the axis of polarity is a prerequisite for such systems to generate cell fate diversity. Oriented divisions also take place in the frog blastula, where orientation of the spindle into the apicobas...

Journal: :Development 2005
Andrew D Chalmers Michael Pambos Julia Mason Stephanie Lang Chris Wylie Nancy Papalopulu

In early vertebrate development, apicobasally polarised blastomeres divide to produce inner non-polarised cells and outer polarised cells that follow different fates. How the polarity of these early blastomeres is established is not known. We have examined the role of Crumbs3, Lgl2 and the apical aPKC in the polarisation of frog blastomeres. Lgl2 localises to the basolateral membrane of blastom...

2009
Harald W. Grießhammer Deepshikha Shukla

We present recent results on elastic deuteron Compton scattering calculations for polarised beans and targets up to next-to-leading order within Chiral Effective Field Theory in the Small Scale Expansion variant to implement a dynamical ∆(1232) degree of freedom. A simple power-counting argument discloses that np-intermediate rescattering states must be explicitly included at leading order alre...

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