scholarly journals Overview of ELCUT and ASONIKA software packages for electromagnetic field research

2021 ◽  
Author(s):  
Ol'ga P. Kalashnikova ◽  
◽  
Evgeniy S. Suryaev ◽  
Keyword(s):  
Electromagnetic Field ◽  
Field Research ◽  
Software Packages

STUDYING THE EFFECT OF THE SCHEME OF EXPOSURE TO MICROWAVE ELECTROMAGNETIC FIELDS ON THE HARDNESS OF THE CURED CARBON FIBER-REINFORCED PLASTIC WITH LIGHTNING-PROTECTION GRID APPLIED ON ITS SURFACE

2020 ◽  
Vol 0 (4) ◽  
pp. 12-18
Author(s):  
I.V. ZLOBINA ◽  
Keyword(s):  
Electromagnetic Field ◽  
Carbon Fiber ◽  
Wind Turbines ◽  
Field Research ◽  
Carbon Plastic ◽  
Lightning Protection ◽  
Fiber Reinforced ◽  
Short Term ◽  
Short Term Exposure ◽  
Carbon Fiber Reinforced

Currently, the use of fiber-reinforced polymer composite materials (PCM), in particular, carbon plastic and fiberglass, is much promising in manufacturing structural elements of aircrafts and wind turbines. In order to increase the resistance of these materials to static electricity and lightning strikes when passing storm fronts, the structure of the PCM includes various lightning protection coatings (LPC). The most common LPC are in the form of copper grids. The fin assembly and planes of aircrafts and also large-sized blades of wind turbines are exposed to cyclic high-amplitude and low-frequency bending loads as well as vibrations. Collisions with solid objects are quite possible. Thus, hardness is one of the key characteristics of PCM that determines their performance properties. Strength and endurance of PCM components can be increased by short-term exposure to a microwave electromagnetic field. The presence of a built-in metallic structure brings additional uncertainty in the tolerance to operating loads by anisotropic PCM, as well as in the process of their interaction with an ultrahigh frequency electromagnetic field. Research was performed on the hardness of carbon fiber-reinforced plastics with built-in LPC using various exposure schemes to a microwave electromagnetic field: from the side of the LPC, from the side opposite to the LPC and sequential processing from both sides. It was found that short-term processing in a microwave electromagnetic field with energy flux density of (17-18)×104mW/cm2 did not lead to any change in the initial hardness of the surface of the samples. However, the uniformity of hardness distribution on the surface of the samples in- creased by 35.8-70%, thus ensuring a more adequate tolerance to loads of different nature. The obtained results can be used in the development of finishing technologies to post-process PCM components and improve the latter’s stability to dynamic loading.

Storm-water jets and plumes in rivers and estuaries

2007 ◽  
Vol 34 (6) ◽  
pp. 691-702 ◽  
Author(s):  
J Alex McCorquodale
Keyword(s):  
Cross Sections ◽  
Open Channel ◽  
Velocity Ratio ◽  
Cross Flow ◽  
Field Research ◽  
Storm Water ◽  
Flow Modelling ◽  
Water Jets ◽  
Software Packages ◽  
Large Width

The interaction of storm-water discharges with the flow in rivers and estuaries often involves cross-flowing jets or plumes. This paper reviews the theoretical, experimental, numerical, and field research on this topic. The geometry of the outfall, the jet velocity ratio, and the relative density of the discharging flow have been shown to affect the mixing and dilution of the discharge into the ambient water. Storm-water outfalls are typically circular or rectangular; however, there are numerous open channel outfalls that have trapezoidal or irregular cross sections with large width to depth ratios. The extensive research of pioneers such as N. Rajaratnam on jets and plumes has led to the development of software packages for outfall evaluations. The CORMIX model is an example of one of these packages. The research on which these models are based is discussed, and some guidelines are given for estimating the dilution at outfalls with high width to depth ratios.Key words: storm water, outfalls, jets, plumes, cross flow, modelling.

scholarly journals Prospects for using the reflected electromagnetic wave-CDP method to search for small geological oil-and-gas prospective objects

2021 ◽  
Vol 931 (1) ◽  
pp. 012019
Author(s):  
E P Kaigorodov ◽  
L B Volokamirskaya ◽  
Y N Dolgikh ◽  
S S Sanin ◽  
V I Kuznetsov ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Seismic Data ◽  
Electromagnetic Waves ◽  
Oil And Gas ◽  
Field Research ◽  
Seismic Data Processing ◽  
The World ◽  
Ground Penetrating ◽  
First Time ◽  
Nenets Autonomous

Abstract The publication presents the key results of testing the reflected electromagnetic waves method at one of the fields of the Yamal-Nenets Autonomous District, including a description of the field research methodology, the principal aspects of the use of sounding equipment for subsurface studying based on the GROT-12 series deep ground-penetrating radars, as well as comparative examples of successful experience in the electromagnetic field processing using software designed for seismic data processing. For the first time in the world practice, the depth of the study averaging 500 - 550 meters, was achieved and confirmed by the speed characteristics of the medium.

scholarly journals Consumption of wood fuels in households in Serbia: Present state and possible contribution to the climate change mitigation

2011 ◽  
Vol 15 (3) ◽  
pp. 571-585 ◽  
Author(s):  
Branko Glavonjic
Keyword(s):  
Climate Change Mitigation ◽  
Fossil Fuels ◽  
District Heating ◽  
Field Research ◽  
Heating System ◽  
District Heating System ◽  
Software Packages ◽  
Wood Fuels ◽  
Gis Software ◽  
Change Mitigation

The paper presents results of the research in wood fuels consumption for house-hold needs in Serbia. Research was performed during the period from October 2010 until April 2011, i. e. in the period of heating season in order to get the actual situation regarding the presence of certain fuel types in the consumption of households with special highlight on types and amounts of wood fuels. For this purpose, an adequate methodological concept was defined with the aim to primarily get relevant and reliable data on wood fuels consumption and afterwards, by using FAO WISDOM methodology and adequate GIS software packages to perform their analysis, mapping, and graphic representation. One of the most significant elements of the adopted methodological concept was field research-questionnaire of households which was conducted on the sample of 36.946 households out of which 20.725 urban and 16.221 rural in 22 municipalities in Serbia, which was 1.46% of the total number of households in Serbia. Results of the survey showed that 23.2% of the total number of households in Serbia used district heating system (based on conventional fossil fuels as dominant), 25.3% used electricity, and 10.6% used gas for heating purposes. Most households (40.9%) used solid fuels such as fuelwood, coal, briquettes, pellets, agricultural residues and combinations of solid and other fuels.

The zoonotic potential of bat-borne coronaviruses

2020 ◽  
Vol 4 (4) ◽  
pp. 365-381
Author(s):  
Ny Anjara Fifi Ravelomanantsoa ◽  
Sarah Guth ◽  
Angelo Andrianiaina ◽  
Santino Andry ◽  
Anecia Gentles ◽  
...  
Keyword(s):  
Genetic Material ◽  
Field Research ◽  
Sympatric Species ◽  
Animal Origin ◽  
Mammalian Host ◽  
Past Century ◽  
The Past ◽  
Novel Host ◽  
Horseshoe Bat ◽  
Human Infections

Seven zoonoses — human infections of animal origin — have emerged from the Coronaviridae family in the past century, including three viruses responsible for significant human mortality (SARS-CoV, MERS-CoV, and SARS-CoV-2) in the past twenty years alone. These three viruses, in addition to two older CoV zoonoses (HCoV-229E and HCoV-NL63) are believed to be originally derived from wild bat reservoir species. We review the molecular biology of the bat-derived Alpha- and Betacoronavirus genera, highlighting features that contribute to their potential for cross-species emergence, including the use of well-conserved mammalian host cell machinery for cell entry and a unique capacity for adaptation to novel host environments after host switching. The adaptive capacity of coronaviruses largely results from their large genomes, which reduce the risk of deleterious mutational errors and facilitate range-expanding recombination events by offering heightened redundancy in essential genetic material. Large CoV genomes are made possible by the unique proofreading capacity encoded for their RNA-dependent polymerase. We find that bat-borne SARS-related coronaviruses in the subgenus Sarbecovirus, the source clade for SARS-CoV and SARS-CoV-2, present a particularly poignant pandemic threat, due to the extraordinary viral genetic diversity represented among several sympatric species of their horseshoe bat hosts. To date, Sarbecovirus surveillance has been almost entirely restricted to China. More vigorous field research efforts tracking the circulation of Sarbecoviruses specifically and Betacoronaviruses more generally is needed across a broader global range if we are to avoid future repeats of the COVID-19 pandemic.

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