We investigate the proposal that a unified theory of all interactions could be based only on fundamental spinor fields, with vielbein and metric arising as composite objects. The effective gravitational theory leads to a modification of Einstein’s equations due to the lack of local Lorentz-symmetry. We explore the generalized gravity with global instead of local Lorentz symmetry in first order ...

In this paper we discuss a novel data compression technique for binary symmetric sources based on the cavity method over GF(q), the Galois Field of order q. We present a scheme of low complexity and near-optimal empirical performance. The compression step is based on a reduction of a sparse low-density parity-check code over GF(q) and is done through the so-called reinforced belief-propagation ...

A cosmological model with modification of the Einstein-Hilbert action by the correction f (R) ∝ βR n is considered. Such way of the description of the " geometrical " dark energy has been introduced repeatedly and the coefficients of the model were chosen to be fit against some observational data. In this paper the unambiguous choice of parameters n and β is proposed from the follow reasons: th...

An indispensable parameter to study strongly correlated electron systems is the magnetic field. Application of high magnetic fields allows the investigation, modification and control of different states of matter. Specifically for magnetic materials experimental tools applied in such fields are essential for understanding their fundamental properties. Here, we focus on selected high-field studi...

TheEMalgorithm is a sophisticatedmethod for estimating statistical models with hidden variables based on theKullback–Leibler divergence. A natural extension of the Kullback–Leibler divergence is given by a class of Bregman divergences, which in general enjoy robustness to contamination data in statistical inference. In this paper, a modification of the EM algorithm based on the Bregman divergen...

Efficient structure search is a major challenge in computational materials science. We present a modification of the basin hopping global geometry optimization approach that uses a curvilinear coordinate system to describe global trial moves. This approach has recently been shown to be efficient in structure determination of clusters [C. Panosetti et al., Nano Lett. 15, 8044-8048 (2015)] and is...

We present a fixed time-step algorithm for the simulation of multi-rigid-body dynamics with joints, contact, collision, and friction. The method solves a linear complementarity problem (LCP) at each step. We show that the algorithm can be obtained as the stiff limit of fixed time-step schemes applied to regularized contact models. We do not perform collision detection. Instead, a noninterpenetr...

A cosmological model with modification of the Einstein-Hilbert action by the correction f (R) ∝ βR n is considered. Such way of the description of the " geometrical " dark energy has been introduced repeatedly and the coefficients of the model were chosen to be fit against some observational data. In this paper the unambiguous choice of parameters n and β is proposed from the follow reasons: th...

The change in the structure and the change in orientation of thin films of Ag2S grown on NaC1 substrates, described in detail in the first part of this work, were studied as a function of the film thickness. The structure of the newly found triclinic pseudocubic modification of Ag2S is discussed. Models for the contact layers are given for the three different growth structures. The structure-ge...

The AURALIAS project (www.auralias.be) aims at developing an interactive and real-time auralization system for room acoustics. The user is immersed into a virtual sound field, looking at an image of the virtual room and interacting with it through an appropriate interface. Precomputed 3D Directional Room Impulse Responses (DRIRs) are first generated by a ray tracing software. They are then conv...