NONLINEAR METHODS OF CALCULATION OF STRUCTURES UNDER THEIR COMPLEX LOADING

Calculations of building structures, the development and improvement of calculation methods, the use of numerical methods in solving these problems are one of the promising areas. The paper presents on the basis of the theory of plastic flow with hardening the equations of state in increments, the equations of virtual work, the geometric equations in increments for small elongations, shifts, and rotation angles. The calculations take into account, depending on the intensity of the current load, the elastoplastic properties of the material, both the structure and the soil environment interacting with it, with a complex process of loading [1-3]. For numerical implementation, the equations arising from the conditions of Genius – applicable to concrete, Coulomb - Mohr – applicable to soil environments are applicable. The information presented is implemented in the form of software systems that make it possible to obtain numerical results of solutions to problems in the calculation of underground structures. An example of calculating a structure based on these methods using a software package is also given. The elastoplastic properties of the material, both the structure and the soil medium interacting with it, are taken into account during the complex process of their loading

Effect of prolonged hypodynamia on certain physiological functions in dogs

The behavior of 20 dogs whose mobility was restricted was experimentally investigated. Their reactions to hypodynamia were either active behavior or progressive general depression and increased muscular weakness. Arterial pressure, pressor sinocarotid reflex valve, body weight, pulse rate, body temperature, and plasma cholinesterase activity were monitered for 28 days. Results are reported

Unattended acoustic sensor systems for noise monitoring in national parks

2017 Spring.Includes bibliographical references.Detection and classification of transient acoustic signals is a difficult problem. The problem is often complicated by factors such as the variety of sources that may be encountered, the presence of strong interference and substantial variations in the acoustic environment. Furthermore, for most applications of transient detection and classification, such as speech recognition and environmental monitoring, online detection and classification of these transient events is required. This is even more crucial for applications such as environmental monitoring as it is often done at remote locations where it is unfeasible to set up a large, general-purpose processing system. Instead, some type of custom-designed system is needed which is power efficient yet able to run the necessary signal processing algorithms in near real-time. In this thesis, we describe a custom-designed environmental monitoring system (EMS) which was specifically designed for monitoring air traffic and other sources of interest in national parks. More specifically, this thesis focuses on the capabilities of the EMS and how transient detection, classification and tracking are implemented on it. The Sparse Coefficient State Tracking (SCST) transient detection and classification algorithm was implemented on the EMS board in order to detect and classify transient events. This algorithm was chosen because it was designed for this particular application and was shown to have superior performance compared to other algorithms commonly used for transient detection and classification. The SCST algorithm was implemented on an Artix 7 FPGA with parts of the algorithm running as dedicated custom logic and other parts running sequentially on a soft-core processor. In this thesis, the partitioning and pipelining of this algorithm is explained. Each of the partitions was tested independently to very their functionality with respect to the overall system. Furthermore, the entire SCST algorithm was tested in the field on actual acoustic data and the performance of this implementation was evaluated using receiver operator characteristic (ROC) curves and confusion matrices. In this test the FPGA implementation of SCST was able to achieve acceptable source detection and classification results despite a difficult data set and limited training data. The tracking of acoustic sources is done through successive direction of arrival (DOA) angle estimation using a wideband extension of the Capon beamforming algorithm. This algorithm was also implemented on the EMS in order to provide real-time DOA estimates for the detected sources. This algorithm was partitioned into several stages with some stages implemented in custom logic while others were implemented as software running on the soft-core processor. Just as with SCST, each partition of this beamforming algorithm was verified independently and then a full system test was conducted to evaluate whether it would be able to track an airborne source. For the full system test, a model airplane was flown at various trajectories relative to the EMS and the trajectories estimated by the system were compared to the ground truth. Although in this test the accuracy of the DOA estimates could not be evaluated, it was show that the algorithm was able to approximately form the general trajectory of a moving source which is sufficient for our application as only a general heading of the acoustic sources is desired

QUASI-LINEAR EVOLUTION AND ELLIPTIC EQUATIONS

In this article we use a new type of nonlinear elliptic operators  that are associated with left side of elliptic equation and studied their properties. We draw up the form, that is associated with non-linear elliptic operator , studying the properties this operator by means of form. We proved some a priori estimates which are theorems about properties of solutions under certain conditions on the function that forming this equation. We proved the existence of solution of quasi-linear evolution equation with singular coefficients in  space by Galerkin method and showed that a given equationhas a solution in the Sobolev space

The Geometry of Space and Its Application to Theory of General Relativity, Derivation of Field Equations

In this paper we study the geometry of space and applications of this space to general theory of relativity. In space we obtained analog Ricci - Jacobi identity; the geodesic lines equation have been researched; we introduced analog of Darboux theory in case of  space, so it was shown the tensor can be presented as the sum of two tensors symmetrical and antisymmetrical with property  We discussed some partial cases gravitational and electromagnetic interaction, and their connection to geometry structure; we considered stronger electromagnetic field in  space. We derived the general field equations (electromagnetic and gravitational) from the variation principle

WHAT IS VALUABLE IN THE ACADEME: CORPUS-BASED ANALYSIS

The paper focuses on the corpus-based analysis of academic discourse values. The research aim is to reveal how teachers transmit academic discourse values through their everyday interactions with students (during lectures, seminars) and to reveal, which values are relevant for the students (based on the analysis of their essays, research papers and some such). The research relies on corpus-based approach and primary methods used are a semantic analysis and a context analysis as well as definition analysis of evaluative means. The research results have revealed that various values play important role in academic interactions and shape the image of the academe – on the local as well as on the global scale. The study of the contexts containing the word valuable in British National Corpus (Davis, 2008-), British Academic Spoken English (Nesi, Thompson, 2000-), British Academic Written English (Nesi, 2008-), Corpus of Russian Student Texts (Rakhilina, Zevakhina, Dzhakupova, 2013-) and Michigan Corpus of Academic Spoken English (2002-) has revealed that the values of academic discourse can be subdivided into six domains: emotional, cognitive, educational, research-related, academic life-related, topic- / area-related. The further applicability of research findings manifests itself in various avenues of research: linguistics (evaluative means), axiology (cross-disciplinary study of values), teaching practices (academic discourse genres) and others.