The stellar evolution code Modules for Experiments in Stellar Astrophysics (MESA) is public and widely used by the community. It includes possibility of taking several non-standard processes such as atomic diffusion into account. Even if effect gravitational settling considered a standard ingredient modelling today, this not case radiative accelerations. specific treatment along with accelerati...

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

In this paper we show that by suitably combining the nodes Ω of the existing geodetic LAGEOS, LAGEOS II and Ajisai SLR satellites and of the radar altimeter Jason–1 satellite it would be possible to measure the general relativistic gravitomagnetic Lense–Thirring effect in the gravitational field of the Earth with a high accuracy and reliability. The proposal of introducing Jason–1 in such a com...

Microscopic diffusion processes (such as radiative levitation and gravitational settling/thermal diffusion) in the outer layers of stars are important because they may give rise to surface abundance anomalies. Here, we compare radiative accelerations (grad) derived from the new Opacity Project (OP) data 1 with those computed from OPAL and some previous data from OP. For the case where we have f...

This study firstly proposes some representative simple methods to obtain the suboptimal passive damping and stiffness parameters from the optimal control gain matrix since it is not possible to add the exact optimal damping and stiffness parameters to the structure in practice. It is shown numerically that modifying the structural damping and the stiffness in the proposed suboptimal ways may su...

IN HIS PERSPECTIVE “SEEING THROUGH DARK Matter” (3 August, p. 607), Stacy McGaugh describes the success of a modified Newtonian dynamics (MOND) in explaining the flat rotation curves of galaxies without invoking dark matter. In addition to noting that MOND is in accord with available data and observations, it is possible to directly test Newtonian dynamics in the laboratory, even at low acceler...

It has long been hoped that model-based control will improve tracking performance while maintaining or increasing compliance. This hope hinges on having or being able to estimate an accurate inverse dynamics model. As a result, substantial effort has gone into modeling and estimating dynamics (error) models. Most recent research has focused on learning the true inverse dynamics using data point...