Abstract Shifts are a well-known feature of the literature on spacetime symmetries. Recently, discussions have focused so-called dynamic shifts, which by analogy with static and kinematic shifts enact arbitrary linear accelerations all matter (as well as change in gravitational potential). But mathematical formulations these breaks down: while shift act field, acts structure instead. I formulat...

This paper is devoted to a statistical analysis of the fluctuations of velocity and acceleration produced by a random distribution of point vortices in two-dimensional turbulence. We show that the velocity probability density function PDF behaves in a manner which is intermediate between Gaussian and Levy laws, while the distribution of accelerations is governed by a Cauchy law. Our study accou...

objective: to compare the effects of two auditory methods by mother and fetus on the results of nst in 2011-2012. materials and methods: in this single-blind clinical trial, 213 pregnant women with gestational age of 37-41 weeks who had no pregnancy complications were randomly divided into 3 groups (auditory intervention for mother, auditory intervention for fetus, and control) each containing ...

We present the design of an all-accelerometer inertial measurement unit (IMU). The IMU forms part of an intelligent hand-held microsurgical instrument that senses its own motion, distinguishes between hand tremor and intended motion, and compensates in real-time the erroneous motion. The new IMU design consists of three miniature dual-axis accelerometers, two of which are housed in a sensor sui...

Abstract We speculate on the development and availability of new innovative propulsion techniques in 2040s, that will allow us to fly a spacecraft outside Solar System (at 150 AU more) reasonable amount time, order directly probe our (gravitational) neighborhood answer pressing questions regarding dark sector (dark energy matter). identify two closely related main science goals, as well seconda...

According to Einstein's equivalence principle, inertial accelerations during translational motion are physically indistinguishable from gravitational accelerations experienced during tilting movements. Nevertheless, despite ambiguous sensory representation of motion in primary otolith afferents, primate oculomotor responses are appropriately compensatory for the correct translational component ...

Location-dependence of physical parameters such as the electromagnetic fine structure constant and Newton’s G produce body accelerations which violate universality of free fall rates testable with laboratory and space experiments. Theoretically related cosmological time variation of these same parameters are also constrained by experiments such as lunar laser ranging, and these time variations ...

Performance of a recently proposed technique for gravity field modeling has been assessed with data from the CHAMP satellite. The modeling technique is a variant of the acceleration approach. It makes use of the satellite accelerations that are derived from the kinematic orbit with the 3-point numerical differentiation scheme. A 322-day data set with 30-s sampling has been used. Based on this, ...

In this paper we explore the possibility of suitably combining the nodes Ω of the existing geodetic LAGEOS, LAGEOS II and Ajisai laser-ranged satellites and of the radar altimeter Jason–1 satellite in order to increase the accuracy in testing the general relativistic gravitomagnetic Lense–Thirring secular effect in the gravitational field of the Earth. The proposal of introducing Ajisai and Jas...

NASA's Double Asteroid Redirection Test (DART) mission will kinetically impact Dimorphos, the secondary component of Didymos binary asteroid system, which excite Dimorphos's dynamical state and lead to significant libration about synchronous possibly chaotic non-principal axis rotation. Although this particular outcome is human caused, many other components systems are also prone such exotic sp...