Results 31 to 40 of about 1,584,853 (313)
AppliedMathThe G-modified Helmholtz equation is a partial differential equation that enables us to express gravity intensity g as a series of spherical harmonics having radial distance r in irrational powers.
Gerassimos Manoussakis
doaj +1 more source
Decoherence-free entropic gravity: Model and experimental tests
Physical Review Research, 2021 Erik Verlinde's theory of entropic gravity [E. Verlinde, J. High Energy Phys. 04 (2011) 02910.1007/JHEP04(2011)029], postulating that gravity is not a fundamental force but rather emerges thermodynamically, has garnered much attention as a possible ...
Alex J. Schimmoller +3 more
doaj +1 more source
Mathematics, 2023 The gravity force of a gravity field generated by a non-rotating level ellipsoid of revolution enclosing mass M is given as a solution of a partial differential equation along with a boundary condition of Dirichlet type. The partial differential equation
Gerassimos Manoussakis
doaj +1 more source
Advances in Difference Equations, 2018 In this article, nonlinear propagation of envelope gravity waves is studied in baroclinic atmosphere. The classical (2+1) $(2+1)$ dimensional nonlinear Schrödinger (NLS) equation can be derived by using the multiple-scale, perturbation method.
Chen Fu, Chang Na Lu, Hong Wei Yang
doaj +1 more source
Higher derivative gravity: Field equation as the equation of state
Physical Review D, 2016 One of the striking features of general relativity is that the Einstein equation is implied by the Clausius relation imposed on a small patch of locally constructed causal horizon. Extension of this thermodynamic derivation of the field equation to more general theories of gravity has been attempted many times in the last two decades.
Dey, Ramit Kumar +2 more
openaire +3 more sources
Estimating gravity equations: to log or not to log? [PDF]
Empirical Economics, 2008 In this study we compare the traditional OLS approach applied to thelog-linear form of the gravity model with the Poisson Quasi MaximumLikelihood (PQML) estimation procedure applied to the non-linearmultiplicative specification of the gravity model.
Boriss Siliverstovs, Dieter Schumacher
openaire +4 more sources
THEORY OF GRAVITY "ENERGY-WAVE": THE ORIGIN [PDF]
, 2014 In this paper I derive an equation relating the gravitational acceleration with the gravitational wavelength corresponding to the “gravitational energy” density at a point in space and with the speed of light, without using the gravitational constant of ...
Rodolfo Sergio González Castro +1 more
core +1 more source
The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation
FEBS Letters, EarlyView.Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge +6 more
wiley +1 more source
Gravity Equations: Workhorse,Toolkit, and Cookbook [PDF]
, 2014 Abstract This chapter focuses on the estimation and interpretation of gravity equations for bilateral trade. This necessarily involves a careful consideration of the theoretical underpinnings since it has become clear that naive approaches to estimation lead to biased and frequently misinterpreted results.
Keith Head, Thierry Mayer
openaire +5 more sources
Molecular Oncology, EarlyView.Matched spatial transcriptomics and single‐nuclei RNA‐seq were generated for anaplastic and BRAFV600E papillary thyroid cancers revealing generic and tumor‐specific states occurring in cancer cells and in the tumor microenvironment. In this context, cancer dedifferentiation mirrored organoid maturation through ordered thyroid marker gain/loss ...
Adrien Tourneur +11 more
wiley +1 more source