scholarly journals Application of the method of observing the natural impulse electromagnetic field of the Earth to trace watered faults on the example of Yeristovo quarry

2019 ◽  
Vol 109 ◽  
pp. 00128
Author(s):  
Kristina Zmiievska ◽  
Oleksandr Tubaltsev ◽  
Artur Zmiievskyi
Keyword(s):  
Electromagnetic Field ◽  
Reliable Method ◽  
Three Dimensional ◽  
Field Studies ◽  
Express Method ◽  
Tectonic Structure ◽  
The Earth ◽  
Three Dimensional Models ◽  
First Time ◽  
Natural Impulse

The article presents the results of applying the express method of observing the natural impulse electromagnetic field of the Earth to isolate flooded faults in areas adjacent to the Yeristovo quarry. The features of the geological and tectonic structure of the territory of the Yeristovo field are considered. According to the results of the field studies, for the first time, maps of the density of the natural impulse electromagnetic field of the Earth flux were constructed for this area, which made it possible to isolate and trace the positions of watering faults. In addition, to visualize the most difficult fragments of the structure of the plots, three-dimensional models were built. On the basis of the conducted research, it is possible to recommend the use of water catching wells using a reasonably economical and reliable method of observing the natural impulse electromagnetic field of the Earth. It is advisable to lay them in the zones of minimum values of the natural impulse electromagnetic field of the Earth, within the southern parts of the research sites. The use of advanced observations will avoid unproductive costs when drilling water-reducing wells.

scholarly journals Possibility of application of the method of observing the natural impulse electromagnetic field of the earth for allocation of watered faults on the example of Yeristovo quarry

2019 ◽  
Vol 28 (1) ◽  
pp. 199-206
Author(s):  
K. Zmiievska ◽  
A. Tubaltsev
Keyword(s):  
Electromagnetic Field ◽  
Three Dimensional ◽  
Field Studies ◽  
Tectonic Disturbance ◽  
The Earth ◽  
Deep Faults ◽  
Iron Ore Deposit ◽  
Three Dimensional Models ◽  
Study Sites ◽  
Natural Impulse

One of the important tasks of operating the Yeristovo iron ore deposit is to reduce the level of water inflows, which complicate its development. The article presents the results of applying the express method of observing the natural impulse electromagnetic field of the Earth to isolate flooded faults in areas adjacent to the Yeristovo quarry. The features of the geological and tectonic structure of the territory of the Yeristovo field are considered. According to the tectonic map of Ukraine, the main deep faults characteristic of Srednepridneprovsky and Ingulsky megablocks of the Ukrainian shield in the area of study sites are highlighted. A method for conducting field studies by observing the natural impulse electromagnetic field of the Earth is presented. The studies were performed using equipment such as a radio wave indicator of the stress-strain state of rocks according to a previously developed technique. According to the results of the field studies, for the first time, maps of the density of the natural impulse electromagnetic field of the Earth flux were constructed for this area, which made it possible to isolate and trace the positions of watering faults. In addition, to visualize the most difficult fragments of the structure of the plots, three-dimensional models were built. Four zones of reduced values of the natural impulse electromagnetic field of the Earth (less than 3 conventional units) were identified on the studied areas. They are characterized by: the western tectonic disturbance - has a width of about 60 m and a strike azimuth of 3-5˚. The tectonic disturbance following it to the east is about 50 m wide and the strike azimuth is also 3-5˚. It is followed by an insignificant tectonic disturbance, which inherits the direction of the Krivyi Rih-Kremenchug break and has a width of about 20 m. In the east of the studied sites, there is a tectonic disturbance with a strike azimuth of 3-5˚, about 20 m wide. Since the azimuths of the strike of the identified tectonic disturbances coincide with the Main and Yeristovo faults characteristic of this territory, the identified faults are their feathering. On the basis of the conducted research, it is possible to recommend the use of water catching wells using a reasonably economical and reliable method of observing the natural impulse electromagnetic field of the Earth. It is advisable to lay them in the zones of minimum values of the natural impulse electromagnetic field of the Earth, within the southern parts of the research sites. The use of advanced observations will avoid unproductive costs when drilling water-reducing wells.

scholarly journals Active Cloaking and Illusion of Electric Potentials in Electrostatics

2021 ◽  
Author(s):  
Andreas Helfrich-Schkabarenko ◽  
Alik Ismail-Zadeh ◽  
Aron Sommer
Keyword(s):  
Electric Potential ◽  
Superposition Principle ◽  
Current Source ◽  
Three Dimensional ◽  
Numerical Results ◽  
Research Fields ◽  
Electric Potentials ◽  
Three Dimensional Models ◽  
First Time ◽  
A Current

Abstract Cloaking and illusion has been demonstrated theoretically and experimentally in several research fields. Here we present for the first time an active exterior cloaking device in electrostatics operating in a two-horizontally-layered electroconductive domain, and use the superposition principle to cloak electric potentials. The device uses an additional current source pattern introduced on the interface between two layers to cancel the total electric potential to be measured. Also, we present an active exterior illusion device allowing for detection of a signal pattern corresponding to any arbitrarily chosen current source instead of the existing current source. The performance of the cloaking/illusion devices is demonstrated by three-dimensional models and numerical experiments using synthetic measurements of the electric potential. Sensitivities of numerical results to a noise in measured data and to a size of cloaking devices are analysed. The numerical results show quite reasonable cloaking/illusion performance, which means that a current source can be hidden electrostatically. The developed active cloaking/illusion methodology can be used in subsurface geo-exploration studies, electrical engineering, live sciences, and elsewhere.

Morphology of the cephalothorax integument of Bryocamptus pygmaeus (Copepoda: Harpacticoida: Canthocamptidae), based on a new research method

2021 ◽  
Vol 30 (2) ◽  
pp. 320-330
Author(s):  
A.A. Novikov ◽  
E.B. Fefilova
Keyword(s):  
Three Dimensional ◽  
Komi Republic ◽  
Southeastern Part ◽  
The North ◽  
Udmurt Republic ◽  
The Republic ◽  
A New Technique ◽  
Three Dimensional Models ◽  
New Research ◽  
First Time

The number and location of sensilla and pores of the cephalothorax integument of the species Bryocamptus pygmaeus (G.O. Sars, 1863) (Copepoda, Canthocamptidae) were studied for the first time on the material from several European regions: the southeastern part of the Bolshezemelskaya tundra (Ne­nets Autonomous District), the north of the Komi Republic, the Republic of Karelia, and the central part of European Russia (Udmurt Republic). In the samples examined, two groups of populations differing in the characters of cephalothorax integument were recognised. These differences were found to correlate with the variability of the endopod of fourth pair of female legs, which bears four setae in specimens of the eastern form, while a specimen examined from Karelia has five setae. Pore maps are composed for both groups of morphotypes. A statistical analysis was carried out based on a new technique using three-dimensional models of the cephalothorax. As a result of this analysis, a high similarity between individuals of the eastern form and differences of the latter from the Karelian specimen were revealed.

scholarly journals Enhanced macroboring and depressed calcification drive net dissolution at high-CO 2 coral reefs

2016 ◽  
Vol 283 (1842) ◽  
pp. 20161742 ◽  
Author(s):  
Ian C. Enochs ◽  
Derek P. Manzello ◽  
Graham Kolodziej ◽  
Sam H. C. Noonan ◽  
Lauren Valentino ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Skeletal Structure ◽  
Global Ocean ◽  
Biological Processes ◽  
Micro Computed Tomography ◽  
Dead Coral ◽  
Intergovernmental Panel ◽  
Three Dimensional Models ◽  
First Time ◽  
High Carbon Dioxide

Ocean acidification (OA) impacts the physiology of diverse marine taxa; among them corals that create complex reef framework structures. Biological processes operating on coral reef frameworks remain largely unknown from naturally high-carbon-dioxide (CO 2 ) ecosystems. For the first time, we independently quantified the response of multiple functional groups instrumental in the construction and erosion of these frameworks (accretion, macroboring, microboring, and grazing) along natural OA gradients. We deployed blocks of dead coral skeleton for roughly 2 years at two reefs in Papua New Guinea, each experiencing volcanically enriched CO 2 , and employed high-resolution micro-computed tomography (micro-CT) to create three-dimensional models of changing skeletal structure. OA conditions were correlated with decreased calcification and increased macroboring, primarily by annelids, representing a group of bioeroders not previously known to respond to OA. Incubation of these blocks, using the alkalinity anomaly methodology, revealed a switch from net calcification to net dissolution at a pH of roughly 7.8, within Intergovernmental Panel on Climate Change's (IPCC) predictions for global ocean waters by the end of the century. Together these data represent the first comprehensive experimental study of bioerosion and calcification from a naturally high-CO 2 reef ecosystem, where the processes of accelerated erosion and depressed calcification have combined to alter the permanence of this essential framework habitat.

scholarly journals N<sub>2</sub>O isotope approaches for source partitioning of N<sub>2</sub>O production and estimation of N<sub>2</sub>O reduction – validation with <sup>15</sup>N gas-flux method in laboratory and field studies

2020 ◽  
Author(s):  
Dominika Lewicka-Szczebak ◽  
Maciej Piotr Lewicki ◽  
Reinhard Well
Keyword(s):  
Three Dimensional ◽  
Field Studies ◽  
Residual Fraction ◽  
N2o Reduction ◽  
Flux Method ◽  
Gas Flux ◽  
Dual Isotope ◽  
Isotopic Signatures ◽  
First Time

Abstract. The approaches based on natural abundance N2O stable isotopes are often applied for the estimation of mixing proportions between various N2O producing pathways as well as for estimation of the extent of N2O reduction to N2. But such applications are associated with numerous uncertainties and hence their limited accuracy needs to be considered. Here we present the first systematic validation of these methods for laboratory and field studies applying the 15N gas-flux method as the reference approach. Besides applying dual isotope plots for interpretation of N2O isotopic data, for the first time we propose a three dimensional N2O isotopocule model based on Bayesian statistics to estimate the N2O mixing proportions and reduction extent based simultaneously on three N2O isotopic signatures (δ15N, δ15NSP and δ18O). Determination of mixing proportions of individual pathways with N2O isotopic approaches appears often imprecise, mainly due to imperfect isotopic separation of the particular pathways. Nevertheless, the estimation of N2O reduction is much more robust, when applying optimal calculation strategy, reaching typically accuracy of N2O residual fraction determination of about 0.1.

scholarly journals N<sub>2</sub>O isotope approaches for source partitioning of N<sub>2</sub>O production and estimation of N<sub>2</sub>O reduction – validation with the <sup>15</sup>N gas-flux method in laboratory and field studies

2020 ◽  
Vol 17 (22) ◽  
pp. 5513-5537
Author(s):  
Dominika Lewicka-Szczebak ◽  
Maciej Piotr Lewicki ◽  
Reinhard Well
Keyword(s):  
Three Dimensional ◽  
Field Studies ◽  
Residual Fraction ◽  
N2o Reduction ◽  
Flux Method ◽  
Gas Flux ◽  
Dual Isotope ◽  
Isotopic Signatures ◽  
First Time

Abstract. The approaches based on natural abundance N2O stable isotopes are often applied for the estimation of mixing proportions between various N2O-producing pathways as well as for estimation of the extent of N2O reduction to N2. But such applications are associated with numerous uncertainties; hence, their limited accuracy needs to be considered. Here we present the first systematic validation of these methods for laboratory and field studies by applying the 15N gas-flux method as the reference approach. Besides applying dual-isotope plots for interpretation of N2O isotopic data, for the first time we propose a three dimensional N2O isotopocule model based on Bayesian statistics to estimate the N2O mixing proportions and reduction extent based simultaneously on three N2O isotopic signatures (δ15N, δ15NSP, and δ18O). Determination of the mixing proportions of individual pathways with N2O isotopic approaches often appears imprecise, mainly due to imperfect isotopic separation of the particular pathways. Nevertheless, the estimation of N2O reduction is much more robust, when applying an optimal calculation strategy, typically reaching an accuracy of N2O residual fraction determination of about 0.15.

scholarly journals Study of the ravine-gully system of the city of Dnipro with the aim of returning them territories to the urban infrastructure

2019 ◽  
Vol 109 ◽  
pp. 00129
Author(s):  
Kristina Zmiievska ◽  
Artur Zmiievskyi
Keyword(s):  
Electromagnetic Field ◽  
Flux Density ◽  
Urban Infrastructure ◽  
The State ◽  
Eastern Side ◽  
The Earth ◽  
Deformation Processes ◽  
The Right ◽  
The City ◽  
Natural Impulse

The article provides an analysis of the state of individual fragments of a ravine-gully system in the right-bank part of the city of Dnepr and its impact on the urban infrastructure. Examples of the successful use and construction of ravines with buildings and structures are considered. According to the results of the survey by the method of the natural impulse electromagnetic field of the Earth, a map-scheme of the flux density of the natural impulse electromagnetic field of the Earth was constructed in the area adjacent to the Monument of Glory, showing the presence of a previously covered ravine. The deformation processes that are observed on the eastern side of the Monastyrska gully are analyzed. Methods for strengthening landslide-prone slopes are considered.

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