scholarly journals SIMULATION OF INTERACTION OF ELECTROMAGNETIC WAVES WITH ANISOTROPIC MEDIA UNDER HYDROCARBON DEPOSITS IN THE MODE OF VIDEO-PULSE SIGNALS

2018 ◽  
Vol 63 (2) ◽  
pp. 250-256
Author(s):  
V. F. Yanushkevich ◽  
K. I. Ivanova ◽  
M. M. Ivanov
Keyword(s):  
Electromagnetic Waves ◽  
Resolving Power ◽  
Radio Waves ◽  
Video Pulse ◽  
Electromagnetic Methods ◽  
Wide Range ◽  
High Level ◽  
Hydrocarbon Deposits ◽  
Hydrocarbon Deposit

The article presents the simulation of the interaction of electromagnetic waves in the mode of video pulse signals with the medium over hydrocarbon deposits. The analysis of the spectra of reflected video pulse signals from the medium over hydrocarbons is carried out. A study of the propagation of radio waves over hydrocarbons is carried out within the framework of a quasihydrodynamic approximation. The choice of the frequencies of video pulse signals is due to the determination of media characteristics over deposits at great depths compared to the surface of the earth. The spectrum of reflected signals from an anisotropic medium above a hydrocarbon deposit in the mode of video pulse signals can be used to determine the electrodynamic characteristics of the medium over the deposit over a wide range of frequencies of probed signals, dielectric permittivities and conductivity of media. The ability to reconfigure a geo-prospecting device from one mode to another (pulse width adjustment) in the presence of a deposit complements the functionality to search for hydrocarbon deposits. Electromagnetic methods for the search for and identification of hydrocarbons can be improved by obtaining information about objects through several information channels, which allows them to be identified with a sufficiently high level of reliability on the background of the underlying environment. The depths of occurrence, the resolving power in the investigated frequency range are determined. The results of the research can be used to develop new electromagnetic methods for the search for hydrocarbon deposits.

scholarly journals CREDIT CAPACITY ASSESSMENT OF COMMERCIAL BANK BORROWER

2019 ◽  
pp. 93-100
Author(s):  
A. Bondarenko ◽  
M. Moiseienko ◽  
V. Gordienko ◽  
O. Dutchenko
Keyword(s):  
Credit Risk ◽  
Accurate Determination ◽  
Integral Model ◽  
Risk Indicator ◽  
Probability Of Default ◽  
Financial Condition ◽  
Wide Range ◽  
Banking Institution ◽  
High Level

The purpose of the article is to study the essence of solvency of the enterprise, to determine the approaches to assessment and analysis of solvency. Since the assessment of the borrower's solvency is the key to the successful functioning not only of the financial and credit institution, but also of the enterprise itself, so in the conditions of formation and development of market relations lenders need to have an accurate idea of the borrower's solvency. Relevance of the research topic is explained by the fact that today the solvency of the enterprise requires a thorough and comprehensive research in terms of the solvency of enterprises and the development of a scientific justification for a common algorithm that borrowers can use to calculate their credit obligations. Today, there is no single algorithm for determining a borrower's solvency. Each banking institution uses its own methodology, which, in its opinion, is the most effective and takes into account a wide range of financial indicators. According to the valuation specificity for the assessment of legal entities regulated by the NBU, determining the borrower's solvency involves analyzing its financial and economic characteristics Requirements of the Regulations on the determination of the size of credit risk by the banks of Ukraine established the calculation of the credit risk indicator, which provides for the definition of the integral indicator, calculation of the borrower's financial class and the probability of default. Within the limits of the given research the complex estimation of Technologia JSC solvency has been carried out, by results of which the quantitative indicators received as a result of construction of the integral model, are included into the range of values corresponding to the second class of the borrower. Calculation of the overall qualitative indicator confirmed the high level of solvency of the studied enterprise, with a minimum probability of default. In order to improve the quality of the solvency assessment of the borrower we propose, in further studies, to consider the competitiveness of the enterprise as a factor of more accurate determination of its financial condition and solvency. Keywords: solvency, borrower, financial standing, financial factors.

scholarly journals The Mythologeme «Conspiracy Theory» in the Modern Civilization Space

2021 ◽  
pp. 123-133
Author(s):  
Olga A. Dmitrieva ◽  
Natalia A. Vanyushina
Keyword(s):  
Scientific Discovery ◽  
Conspiracy Theory ◽  
Value System ◽  
Conspiracy Theories ◽  
Cultural Approach ◽  
Mass Consciousness ◽  
Wide Range ◽  
The Common ◽  
High Level

Modern civilization space is characterized by a high level of technical and scientific discovery, however, mythological consciousness and belief in conspiracy theories still exist. The article deals with one of the popular mythologies of modern civilization – the conspiracy theory. The relevance of the presented research is due to the importance of considering from the position of linguistic and cultural understanding the mechanisms of the generation and spread of myths in the modern communicative mass consciousness, which actively appeals to mythologems, despite the highly developed science. The analysis of a wide range of theoretical sources of both Russian and foreign authors is carried out in order to comprehensively study the stated issue. The description of universal and ethnospecific mythologies of the modern civilizational space is given, which indicates both the globalization processes and the uniqueness of the value system of each country, respectively. The determination of the values that make up the conspiracy discourse, the dominant “evil”, remains constant. The analysis of the empirical research material is carried out in line with the linguistic and cultural approach with the involvement of elements of frame analysis and discourse analysis. Special attention is paid to the issues of the structure of the conspiracy theory, as well as to the conspiratorial discourse, within which the frame «conspiracy theory» gets its implementation. When describing the «Conspiracy Mystery» frame, its hierarchically ordered structure is noted, which consists of interconnected subframes and slots. The analysis made it possible to determine the common characteristics of the «conspiracy theory» frame, as well as to identify areas of ethno-cultural reflection. The structure of the conspiracy discourse is described: participants, chronotope, value priorities, and strategies. It is noted that most of the theories under consideration are universal, but local ones that are widespread within a certain state remain.

Analysis of Multi-Component Gas Mixtures by Correlation of Infrared Spectra

1984 ◽  
Vol 38 (5) ◽  
pp. 705-709 ◽  
Author(s):  
D Bingham ◽  
C. H. Burton
Keyword(s):  
Experimental Investigation ◽  
Infrared Spectra ◽  
Simulation Study ◽  
Gas Mixtures ◽  
Resolving Power ◽  
Polar Component ◽  
Partial Pressures ◽  
Wide Range ◽  
Gas Pressures

A simulation study and an experimental investigation of the effect of noise and resolution in the determination of polar gas pressures in gas mixtures has been performed The pressures were obtained by a procedure which correlates the polar gas infrared spectra and describes band absorptance phenomenologically For single-polar-component binary mixtures, the partial pressure may be found accurately over a wide range of resolution Low resolving powers are favored with noisy spectra Polar gas partial pressures were also extracted from quaternary mixtures, with an uncertaintity of less than 5% over a wide range of resolving power Improvements to and limitations of the technique are discussed

scholarly journals Glass–Adhesive–Steel Joint Inspection Using Mechanic and High Frequency Electromagnetic Waves

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4648
Author(s):  
Jakub Kowalczyk ◽  
Przemyslaw Lopato ◽  
Grzegorz Psuj ◽  
Dariusz Ulbrich
Keyword(s):  
Electromagnetic Waves ◽  
Integrated System ◽  
Coordinate Space ◽  
Steel Joint ◽  
Electromagnetic Methods ◽  
Wide Range ◽  
Pooling Strategies ◽  
Vehicle Production ◽  
Steel Joints ◽  
Physical Phenomena

The utilization of a glass–adhesive–steel joint in modern machine and vehicle production is constantly growing. Despite the technological regime during the production process, various defects in the adhesive joints may occur. One of the major problems is lack of adhesive between joined materials. Due to the widespread use of non-transparent layers increasing adhesion, it is frequently not possible to conduct simple visual inspections. Hence, it is important to develop a non-destructive adhesive path continuity examination procedure. In that process, the different physical properties of the joint materials must be taken into account. Therefore, in this paper various testing methods were used, including ultrasound, thermographic and electromagnetic methods operating in the microwave and terahertz frequency range. Different physical phenomena of the methods allowed for examination of the joint in a wide context. In order to verify the information brought by each method, the results were transferred into common coordinate space, compared and finally integrated. Various opinion pooling strategies were conducted to fuse data, which allowed us to emphasize convergent and complementary information on adhesive continuity. The obtained results are promising and constitute the basis for further work on an integrated system for automatic evaluation of a wide range of possible defects in glass–adhesive–steel joints.

scholarly journals Morphophysiological and Proteomic Responses on Plants of Irradiation with Electromagnetic Waves

2021 ◽  
Vol 22 (22) ◽  
pp. 12239
Author(s):  
Zhuoheng Zhong ◽  
Xin Wang ◽  
Xiaojian Yin ◽  
Jingkui Tian ◽  
Setsuko Komatsu
Keyword(s):  
Gamma Rays ◽  
Communication Systems ◽  
Electromagnetic Waves ◽  
Insect Pests ◽  
Electromagnetic Energy ◽  
Fertilizer Efficiency ◽  
Future Research ◽  
X Rays ◽  
Radio Waves ◽  
Wide Range

Electromagnetic energy is the backbone of wireless communication systems, and its progressive use has resulted in impacts on a wide range of biological systems. The consequences of electromagnetic energy absorption on plants are insufficiently addressed. In the agricultural area, electromagnetic-wave irradiation has been used to develop crop varieties, manage insect pests, monitor fertilizer efficiency, and preserve agricultural produce. According to different frequencies and wavelengths, electromagnetic waves are typically divided into eight spectral bands, including audio waves, radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. In this review, among these electromagnetic waves, effects of millimeter waves, ultraviolet, and gamma rays on plants are outlined, and their response mechanisms in plants through proteomic approaches are summarized. Furthermore, remarkable advancements of irradiating plants with electromagnetic waves, especially ultraviolet, are addressed, which shed light on future research in the electromagnetic field.

Sharing is Caring: Transboundary Hydrocarbon Deposits on the Continental Shelf

2021 ◽  
Vol 62 (1) ◽  
pp. 431-474
Author(s):  
Bjørn Kunoy
Keyword(s):  
Continental Shelf ◽  
International Law ◽  
Customary International Law ◽  
Treaty Provision ◽  
Continental Shelves ◽  
State Practice ◽  
Hydrocarbon Deposits ◽  
Hydrocarbon Deposit

Abstract: The sovereign and exclusive rights of States to explore the continental shelf and exploit its resources implies an unfettered right to exclude any exploitation by a third State of hydrocarbons that are located on its continental shelf. Yet, these rights do not allow impairment to the sovereign and exclusive rights of third States to exploit resources that extend onto their continental shelves. State practice demonstrates multiple definitions of hydrocarbon deposits implying that the decision of whether a hydrocarbon deposit is transboundary may vary depending on the relevant treaty provision. State practice also indicates heterogeneous procedural and substantive approaches to the commencement of transboundary hydrocarbon deposits exploitation. These differences have substantive implications relevant to the determination of the constitutive elements of transboundary hydrocarbon deposits and for the circumstances under which a transboundary hydrocarbon deposit can operate under customary international law.

scholarly journals Positioning system on impulse ultrawideband fields

2019 ◽  
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Electromagnetic Waves ◽  
Time Synchronization ◽  
Global Scale ◽  
Positioning System ◽  
Radio Waves ◽  
Artificial Neural ◽  
New System

Background: The systems of positioning on the base of radiowaves are widely used both in a global scale and for the exact position-finding of objects indoors. Global systems of positioning usually need valuable high-quality time synchronization, assume substantial errors at improper weather, at falling of radio waves on the earth surface at small angles, shading of transceivers by large obstacles, and at presence of radio electronic interferences of different nature. Objectives Investigation of the new system of positioning on the ultrawideband impulse electromagnetic fields and their analysis by an artificial neural network is proposed. Materials and methods: The phenomenon of the pulse form change on angle of radiation by antenna is used for the determination of the position of ultrawideband receiver. At first, the two-dimensional case of the problem is considered. Exciting two antennas separated at known distance by means of different impulse signals it is possible to define the place of location of receiver if we know the angles of arrival of impulses from each antenna. The ultrawideband bow-tie antennas excited by the Gaussian impulses of different durations are used as irradiators. The forms of the received impulses are calculated by method of Finite Differences in Time Domain (FDTD). The classification of the time forms of the received electromagnetic waves from different antennas at different angles of radiation is carried out by a deep neural network. Results: It is shown that for the classification the artificial neural network pays special attention to the intervals of time where the received impulse changes quickly. The four-layer network faultlessly distinguishes the obtained signals from different antennas. The numerical calculation of the electromagnetic problem and artificial neural network training show the possibility of determination of angles of radiation by the network with the accuracy of one degree excepting some cases. Using the basis between antennas of 50 meters the precision of receiver position determination is not worse than 62 cm in the square domain of 50 meter size eliminating some angles where the accuracy falls to 2 meters. Conclusion: Property of antennas to change the form of radiated ultrawideband impulses for different angles can be used for the construction of the new system of positioning that does not need the time synchronization with transmitters. The proposed system can be effectively employed indoors. The distinctive feature of the impulse electromagnetic wave positioning system is its immunity to the existent narrowband electromagnetic waves.

Transmission Electron Microscopy of Protein Macromolecules

1971 ◽  
Vol 29 ◽  
pp. 424-425
Author(s):  
Henry S. Slayter
Keyword(s):  
Biological Systems ◽  
Metal Vapor ◽  
Resolving Power ◽  
Electron Microscopic ◽  
Chemical Methods ◽  
Molecular Weights ◽  
The Past ◽  
Physical Chemical ◽  
Transmission Electron

Electron microscopic methods have been applied increasingly during the past fifteen years, to problems in structural molecular biology. Used in conjunction with physical chemical methods and/or Fourier methods of analysis, they constitute powerful tools for determining sizes, shapes and modes of aggregation of biopolymers with molecular weights greater than 50, 000. However, the application of the e.m. to the determination of very fine structure approaching the limit of instrumental resolving power in biological systems has not been productive, due to various difficulties such as the destructive effects of dehydration, damage to the specimen by the electron beam, and lack of adequate and specific contrast. One of the most satisfactory methods for contrasting individual macromolecules involves the deposition of heavy metal vapor upon the specimen. We have investigated this process, and present here what we believe to be the more important considerations for optimizing it. Results of the application of these methods to several biological systems including muscle proteins, fibrinogen, ribosomes and chromatin will be discussed.

Experimental Determination of the Effective Resolution Limit in Thick Specimens at High Voltages

1975 ◽  
Vol 33 ◽  
pp. 664-665
Author(s):  
Mircea Fotino
Keyword(s):  
Experimental Approach ◽  
Chromatic Aberration ◽  
Resolving Power ◽  
Biological Research ◽  
Specimen Thickness ◽  
Resolution Limit ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
Resolution Level

The use of thick specimens (0.5 μm to 5.0 μm or more) is one of the most resourceful applications of high-voltage electron microscopy in biological research. However, the energy loss experienced by the electron beam in the specimen results in chromatic aberration and thus in a deterioration of the effective resolving power. This sets a limit to the maximum usable specimen thickness when investigating structures requiring a certain resolution level.An experimental approach is here described in which the deterioration of the resolving power as a function of specimen thickness is determined. In a manner similar to the Rayleigh criterion in which two image points are considered resolved at the resolution limit when their profiles overlap such that the minimum of one coincides with the maximum of the other, the resolution attainable in thick sections can be measured by the distance from minimum to maximum (or, equivalently, from 10% to 90% maximum) of the broadened profile of a well-defined step-like object placed on the specimen.

Microwaves: Application in Electron Microscopy

1990 ◽  
Vol 48 (3) ◽  
pp. 140-141
Author(s):  
Anthony S-Y Leong ◽  
David W Gove
Keyword(s):  
Electron Microscopy ◽  
Light Microscopy ◽  
Chemical Reactions ◽  
Electromagnetic Waves ◽  
Tissue Fixation ◽  
Primary Method ◽  
Dipolar Molecules ◽  
Wide Range ◽  
Time Required ◽  
Cryostat Sections

Microwaves (MW) are electromagnetic waves which are commonly generated at a frequency of 2.45 GHz. When dipolar molecules such as water, the polar side chains of proteins and other molecules with an uneven distribution of electrical charge are exposed to such non-ionizing radiation, they oscillate through 180° at a rate of 2,450 million cycles/s. This rapid kinetic movement results in accelerated chemical reactions and produces instantaneous heat. MWs have recently been applied to a wide range of procedures for light microscopy. MWs generated by domestic ovens have been used as a primary method of tissue fixation, it has been applied to the various stages of tissue processing as well as to a wide variety of staining procedures. This use of MWs has not only resulted in drastic reductions in the time required for tissue fixation, processing and staining, but have also produced better cytologic images in cryostat sections, and more importantly, have resulted in better preservation of cellular antigens.

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