Numerical simulation of the unsteady ECM process

The process of EM machining of a two-dimensional surface of a machine part is the focus of this investigation. The linear approximation for electrostatic field is assumed. Electrolyte in machining gap is simulated as two-phase continuum-mixture of an incompressible fluid and gas. The system of unsteady conservation equations, averaged across the gap is written for a two-dimensional domain. It is solved by finite difference method. Influence of unsteady technological factors on the accuracy of machining process is examined

EP-1036: Stereotactic radiotherapy for moving targets with the active breathing control

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Spatial asymmetry of optically excited spin waves in anisotropic ferromagnetic film

We analytically discuss and micromagnetically prove the ways to tune the spatial asymmetry of the initial phase, amplitude, and wavevectors of magnetostatic waves driven by ultrafast laser excitation. We consider that the optical pulse heats a thin ferromagnetic metallic film and abruptly decreases the saturation magnetization and the parameter of uniaxial anisotropy. The two corresponding terms of laser-induced torque have different azimuthal symmetries, with the 4-fold symmetry of the demagnetization-related term, and the isotropic distribution of the anisotropy-related term. As a result, the initial phase and amplitude of excited magnetostatic waves have a non-trivial azimuthal distribution tunable with the angle between the external magnetic field and anisotropy axis, and the laser spot diameter. Moreover, the variation of these parameters tunes the distribution of wavevectors, resulting in additional asymmetry between the spectral components of the waves propagating in different directions.Comment: 8 pages, 5 figure

Patch Antenna for Measuring the Internal Temperature of Biological Objects Using the Near-Field Microwave Radiometric Method

The near-field microwave antenna with central frequency of 2.23 GHz has been designed and manufactured to be used as a part of the medical microwave radiometric system. Experimental studies of the reflection coefficient in different parts of the human body were conducted using the developed antenna. The experimental studies were carried out in a group of volunteers with normal somatic growth. The results of the experiments were used to perform the analysis of the potential errors in the measurements obtained via the developed antenna

Biological resources of the Hyssopus l on the south of European Russia and prospects of its introduction

The south of European Russia (geographically - the southern part of the Central Russian Upland) has large biological and plant genetic resources. There is a concept considering the region as the second anthropogenic microgen center of formation of economically valuable plants. In the south of the Central Russian Upland, the genus Hyssopus L. is represented by two species: Hyssopus cretaceus Dubjan. and Hyssopus officinalis L. Accomplished the study of biological resources of species of the genus Hyssopus L. in vivo and in vitr

Orbital Optimized Density Functional Theory for Electronic Excited States

Density functional theory (DFT) based modeling of electronic excited states is of importance for investigation of the photophysical/photochemical properties and spectroscopic characterization of large systems. The widely used linear response time-dependent DFT (TDDFT) approach is however not effective at modeling many types of excited states, including (but not limited to) charge-transfer states, doubly excited states and core-level excitations. In this perspective, we discuss state-specific orbital optimized (OO) DFT approaches as an alterative to TDDFT for electronic excited states. We motivate the use of OO-DFT methods and discuss reasons behind their relatively restricted historical usage (vs TDDFT). We subsequently highlight modern developments that address these factors and allow efficient and reliable OO-DFT computations. Several successful applications of OO-DFT for challenging electronic excitations are also presented, indicating their practical efficacy. OO-DFT approaches are thus increasingly becoming a useful route for computing excited states of large chemical systems. We conclude by discussing the limitations and challenges still facing OO-DFT methods, as well as some potential avenues for addressing them