نتایج جستجو برای: flat b

تعداد نتایج: 953297  

Journal: :Universe 2022

This paper investigates the impact of bulk viscosity within framework f(T,B) gravity. We consider a time-dependent model with particular Hubble parameter expression. Here, we looked into viability well-motivated gravity model, which takes form f=αlog(B)+βT, and has free parameters α β. The 46 observational data (OHD) in range 0≤z≤2.36 were used to constrain achieve solution. have Markov Chain M...

Journal: :Fortschritte der Physik 2002

Journal: :Classical and Quantum Gravity 2022

In this work we study the deflection and gravitational lensing of null timelike signals in Kiselev spacetime weak field limit, to investigate effects equation state parameter $\omega$ matter amount $\alpha$. doing this, extend a perturbative method previously developed for asymptotically flat spacetimes whose metric functions have integer-power asymptotic expansions case that may or not be but ...

Objective: This study aims to compare the variables of plantar force, pressure and impulse during walking in men and women with flat feet. Methods: The study population consists of non-athlete students with and without flat feet. Of these, 48 (male and female) were selected as study samples. The peak pressure, force and impulse on the foot were measured during walking by a foot scanner at a sa...

Journal: گلجام 2006
A Rashidi, S.Ali Mojabi, S.J Bassam, Saeed Shaikhzadeh Najar, Shahrokh Hosseini Hashemi,

In this research, an apparatus was designed and constructed in order to simulate the storage behavior of hand-woven carpet under different environmental conditions. Silk hand-woven carpet (“Gom”) with 115×75 cm dimensions and 102×97 knot per 10 cm was selected and then inserted into the packing simulator with two different laying configurations including flat and folded....

Journal: :Journal of Algebra 1999

1996
JOHN LOTT

We prove an index theorem concerning the pushforward of flat B-vector bundles, where B is an appropriate algebra. We construct an associated analytic torsion form T . If Z is a smooth closed aspherical manifold, we show that T gives invariants of π∗(Diff(Z)).

2008
L. V. Verozub

We argue that our gravitation equations [1] in the flat space-time lead to the finite proper gravitational energy of a point mass. 1 The Gravitation Equations Perhaps [2] , gravitation can be described by a tensor field ψ µν in flat space-time and the Lagrangian action for the test point masses m in this field is of the form L = −mc[g αβ (ψ) ˙ x α ˙ x β ] 1/2 , (1) where ˙ x α = dx α /dt and g ...

Journal: :PVLDB 2012
Pirooz Chubak Davood Rafiei

Natural language text corpora are often available as sets of syntactically parsed trees. A wide range of expressive tree queries are possible over such parsed trees that open a new avenue in searching over natural language text. They not only allow for querying roles and relationships within sentences, but also improve search effectiveness compared to flat keyword queries. One major drawback of...

Journal: :Applied optics 2009
David McKee Malik Chami Ian Brown Violeta Sanjuan Calzado David Doxaran Alex Cunningham

The particulate backscattering ratio (b(bp)/b(p)) is a useful indicator of the angular scattering characteristics of natural waters. Recent studies have shown evidence both for and against significant spectral variability in b(bp)/b(p) in the visible domain, but most show significant variability in its magnitude. We present results from a case study in which both backscattering and scattering c...

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