FRiED : A Novel Three-dimensional Model of Coronal Mass Ejections

We present a novel three-dimensional (3D) model of coronal mass ejections (CMEs) that unifies all key evolutionary aspects of CMEs and encapsulates their 3D magnetic field configuration. This fully analytic model is capable of reproducing the global geometrical shape of a CME with all major deformations taken into account, i.e., deflection, rotation, expansion, “pancaking,” front flattening, and rotational skew. Encapsulation of 3D magnetic structure allows the model to reproduce in-situ measurements of magnetic field for trajectories of spacecraft-CME encounters of any degree of complexity. As such, the model can be used single-handedly for the consistent analysis of both remote and in-situ observations of CMEs at any heliocentric distance. We demonstrate the latter by successfully applying the model for the analysis of two CMEs.Peer reviewe

Theory of dynamic magnetic susceptibility in uniaxial superparamagnetic particles

The dynamic magnetic susceptibility of small particles with an easy axis magnetization anisotropy is calculated in a model with a continuously variable orientation of their magnetic moment, i.e., based on the Fokker-Planck equation. Results are presented which can be used to determine the optimum range for the parameters of the problem and which ensure maximal response of the system to a stochastic resonance. The amplification factor for the ac hyperfine field is calculated for external radio frequency modulation. A comparison is made with results from a discrete orientation model employed by us earlier. © 1996 American Institute of Physics

Justification of expediency of application of industrial cosourcing at industrial enterprises

© Medwell Journals, 2016.In the research, the essence of the industrial cosourcing, its role in management of the industrial enterprise is outlined. The "make or buy decision" is improved with taking into account a cosourcing, the new decision "make and/or buy decision" is defined. The technique of determination of expediency of application of the industrial cosourcing at the industrial enterprise is developed and offered

On the theory of quantum stochastic resonance in single-domain magnetic particles

The phenomenon of stochastic resonance in a system of small magnetic particles with easy-axis anisotropy, where stochastic magnetization reversal in such particles occurs by macroscopic quantum tunneling of the magnetization, is investigated theoretically. An analytical model in the approximation of discrete orientations is proposed for calculating the dynamic (rf) susceptibility of easy-axis single-domain particles in a constant magnetic field applied perpendicular to the easy axis. The new contribution of this model lies in a more accurate description of quantum tunneling under conditions of rf modulation at temperatures close to absolute zero. The adequacy of the proposed approximation is checked by numerical modeling and by comparing the results with the published results on quantum tunneling and stochastic resonance. © 1998 American Institute of Physics

Mössbauer transition dynamics in conditions of strong excitation of nuclear spins

The state of the art Mössbauer spectroscopy has made unquestionable advance possible in the solid microstructure study. Apart from that application of the Mössbauer effect, another domain of investigations has been outlined since the outset, in the sixties, wherein the properties of gamma-radiation interaction with resonant nuclei in a recoilless mode are stressed. There were these recoilless processes that enabled to distinguish the gamma-radiation of natural width, and greatly encouraged the arising of traditional optics problems in the gamma range. The subject of interest in this article deals as well with the Mössbauer gamma optics. Essentially it is a gamma-ray (Mössbauer) susceptibility of the excited, non-equilibrium state of the nuclear spin system. We analyze the Mössbauer transitions in the strong coherent excitation of nuclear spins regime and the possibilities to deliberately vary the polarization, spectral and/or temporal properties of gamma-radiation propagating through a time-modulated medium

On the method of Lyapunov constant-sign functionals

© 2014 S. V. Pavlikov, A. G. Isavnin and D. T. Suyucheva. In the work there is investigated the stability of the zero solution of a nonautonomous functional differential equation of the delayed type by means of limiting equations and Lyapunov constant-sign functional. An appropriate illustrating example is given

ElEvoHI : A NOVEL CME PREDICTION TOOL FOR HELIOSPHERIC IMAGING COMBINING AN ELLIPTICAL FRONT WITH DRAG-BASED MODEL FITTING

This article has an erratum: DOI 10.3847/0004-637X/831/2/210In this study, we present a new method for forecasting arrival times and speeds of coronal mass ejections (CMEs) at any location in the inner heliosphere. This new approach enables the adoption of a highly flexible geometrical shape for the CME front with an adjustable CME angular width and an adjustable radius of curvature of its leading edge, i.e., the assumed geometry is elliptical. Using, as input, Solar TErrestrial RElations Observatory (STEREO) heliospheric imager (HI) observations, a new elliptic conversion (ElCon) method is introduced and combined with the use of drag-based model (DBM) fitting to quantify the deceleration or acceleration experienced by CMEs during propagation. The result is then used as input for the Ellipse Evolution Model (ElEvo). Together, ElCon, DBM fitting, and ElEvo form the novel ElEvoHI forecasting utility. To demonstrate the applicability of ElEvoHI, we forecast the arrival times and speeds of 21 CMEs remotely observed from STEREO/HI and compare them to in situ arrival times and speeds at 1 AU. Compared to the commonly used STEREO/HI fitting techniques (Fixed-phi, Harmonic Mean, and Self-similar Expansion fitting), ElEvoHI improves the arrival time forecast by about 2 to +/- 6.5 hr and the arrival speed forecast by approximate to 250 to +/- 53 km s(-1), depending on the ellipse aspect ratio assumed. In particular, the remarkable improvement of the arrival speed prediction is potentially beneficial for predicting geomagnetic storm strength at Earth.Peer reviewe

Classification approach in determination of knowledge in context of organization

The role of knowledge in developed countries is high. Scientific knowledge is the basis of the economy of the XXI century. Knowledge has become a new factor of production, the signifi-cance of which in competition will only increase. In the scientific literature they write about knowledge as an important competitive ad-vantage, strategic asset, but at the same time, it is extremely rare to find a clear definition of "knowledge". In scientific and business literature a large number of different interpretations of this definition are observed. In this article attempt to generalize the different points of view and to group them in approaches is made. The following attributes of the concept "knowledge" were identified: quality, relevance and descriptive characteristics. Analysis of the "knowledge" concept was conducted from the perspective of structural, in-tegrated, systematic-informational, systematic-functional, systematic-genetic, and systematic and management approaches. On the basis of this analysis there was proposed the author's defini-tion of the "knowledge" concept