Untitled

Abstract

We compared the stability and discriminatory power of different methods of determining cardiac magnetic field map (MFM) orientation within the context of coronary artery disease (CAD). In 27 healthy subjects and 24 CAD patients, multichannel magnetocardiograms were registered at rest. MFM orientation was determined during QT interval using: (a) locations of the positive and negative centres-of-gravity, (b) locations of the field extrema and (c) the direction of the maximum field gradient. Deviation from normal orientation quantified the ability of each approach to discriminate between healthy and CAD subjects. Although the course of orientation was similar for all methods, receiver operating characteristic analysis showed the best discrimination of CAD patients for the centre-of-gravity approach (area-under-the-curve = 86%), followed by the gradient (84%) and extrema (76%) methods. Consideration of methodological and discriminatory advantages with respect to noninvasive diagnosis of CAD suggests that the centres-of-gravity method is the most suited one.

Computations of the collapse of a stellar iron core allowing for the absorption, emission, and scattering of electron neutrinos and anti-neutrinos

“…The duration of the neutrino signal of 2 s is comparable to the characteristic hydrodynamical time scale for the initial model, ∼1/ GM/R 3 s . The computation results are important for the detection of neutrino radiation [26], as well as the verification of SN mechanisms, although it is unlikely that this phenomenon can be fully explained using spherically symmetrical models.…”

“…We considered 4 2 He nuclei with ω He = 1 and binding energy per nucleon Q He = 28.296 MeV and 56 26 Fe nuclei with ω Fe = 1 and Q Fe = 492.322 MeV,…”

“…Even such models can be studied using the codes we have developed. The situation with regard to observational data that can be obtained has improved substantially, in connection with the construction of new neutrino observations that are more sensitive than those in existence during the explosion of SN 1987A [26] (by orders of magnitude), as well as the construction of new gravitational-wave detectors [27]. Therefore, the development of physical-mathematical models incorporating sufficiently complete physics remains of interest [28,29].…”

Supernova explosion mechanism taking into account large-scale convection and neutrino transport

“…Even these models are of interest and can be studied using our computational codes. The situation with regard to observational data will be significantly improved with the construction of new neutrino observatories, designed to be more sensitive (by several orders of magnitude [40]) than those existing at a time of the SN 1987A explosion, and new gravitational wave detectors [41], aiming to detect first signals from a nearby supernova. Therefore, even the development of one-dimensional models that include sufficiently complete physics remains very topical [42][43][44].…”

Gravitational Collapse of Stars and the Methods of Its Observations

“…As follows from the theoretical calculations, during the gravitational collapse of stars the gravitational and electromagnetic radiation will generate. (Kryvdyk, 1998;Kryvdyk, 2008;Kryvdyk, 2009;Kryvdyk, 2010;Chau, and Zhang, 1992;Gunningam et al, 1978;Gunningam et al, 1979;Gunningam et al, 1980;Hanami, 1997;Henricsen et al, 1979;MacFadyen and Woosley, 1999;, Mitsuda et al, 2005;Moncrief, 1980;Morley and Schmidt, 2002;Paranjape and Padmanabhan, 2009;Ruffini et al, 2005a;Ruffini et al, 2005b;Ruffini et al, 2007;Ruffini et al, 2003;Shibata and Taniguchi, 2006;Uzdensky, 2007), (Kryvdyk, 2014a;Kryvdyk, 2014b;Anchordoqui, 2009;Becker and Biermann, 2009;Blinnikov et al, 1988;Dutta et al, 2000a;Dutta et al, 2000b;Lu and Qian, 2007;Nakazato et al, 2007;Ryazhskaya, 2006;Vigorito et al, 2008;Yu et al, 2008).…”