نتایج جستجو برای: correlation tensor

تعداد نتایج: 431884  

Journal: :Magnetic resonance in medicine 2010
Martijn Froeling Jos Oudeman Sandra van den Berg Klaas Nicolay Mario Maas Gustav J Strijkers Maarten R Drost Aart J Nederveen

The aim of the present study was to evaluate a fast clinical protocol to enable diffusion tensor imaging of the human forearm and assess the reproducibility of six diffusion tensor imaging parameters, i.e., the tensor eigenvalues (λ(1), λ(2), and λ(3)), mean diffusivity, fractional anisotropy, and ellipsoid eccentricity. The right forearms of 10 healthy volunteers were scanned twice, with a 1-w...

Journal: :Journal of Physics: Conference Series 2006

R. Gharibi T. Yazdanpanah

We introduce Banach algebras arising from tensor norms. By these Banach algebras we make Arensregular Banach algebras such that tensor product becomes irregular, where is tensor norm. Weillustrate injective tensor product, does not preserve bounded approximate identity and it is notalgebra norm.

2003
Steven Weinberg

An analytic formula is given for the traceless transverse part of the anisotropic stress tensor due to free streaming neutrinos, and used to derive an integro-differential equation for the propagation of cosmological gravitational waves. The solution shows that anisotropic stress reduces the squared amplitude by 35.6 % for wavelengths that enter the horizon during the radiation-dominated phase,...

In this paper, we calculate the relativistic bulk tensor and shear tensor of the relativistic accretion ows in the Kerr metric, overall and without any approximation. We obtain the relations of all components of the relativistic bulk and shear tensor in terms of components of four-velocity and its derivatives, Christoffel symbols and metric components in the BLF. Then, these components are deri...

1999
Kin-Wang Ng

We reexamine the temperature-polarization correlation function of the cosmic microwave background induced by tensor mode with a scale-invariant spectrum in reionized standard cold dark matter models. It is found that the sign of the correlation function is positive on all angular scales even in a model with substantial reionization. PACS numbers: 98.70.Vc, 98.80.Es Typeset using REVTEX ∗nkw@phy...

2011
Sambasiva Rao Chinnamsetty Hongjun Luo Wolfgang Hackbusch Heinz-Jürgen Flad André Uschmajew

Tensor product approximation of pair-correlation functions opens a new route from quantum Monte Carlo (QMC) to explicitly correlated F12 methods. Thereby one benefits from stochastic optimization techniques used in QMC to get optimal pair-correlation functions which typically recover more than 85 % of the total correlation energy. Our approach incorporates, in particular, core and core-valence ...

In this paper, we study the tensor commutativity degree of pair of finite groups. Erdos introduced the relative commutativity degree and studied its properties. Then, Mr. Niroomand introduced the tensor relative commutativity degree, calculated tensor relative degree for some groups, and studied its properties. Also, he explained its relation with relative commutativity degree. In this paper, w...

Journal: :The American journal of forensic medicine and pathology 2015
Patricia Mildred Flach Sarah Schroth Wolf Schweitzer Garyfalia Ampanozi Johannes Slotboom Claus Kiefer Tanja Germerott Michael J Thali Marwan El-Koussy

PURPOSE In traumatic brain injury, diffusion-weighted and diffusion tensor imaging of the brain are essential techniques for determining the pathology sustained and the outcome. Postmortem cross-sectional imaging is an established adjunct to forensic autopsy in death investigation. The purpose of this prospective study was to evaluate postmortem diffusion tensor imaging in forensics for its fea...

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