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Article ; Online: OperatorEYEVP: Operator Dataset for Fatigue Detection Based on Eye Movements, Heart Rate Data, and Video Information.

Kovalenko, Svetlana / Mamonov, Anton / Kuznetsov, Vladislav / Bulygin, Alexandr / Shoshina, Irina / Brak, Ivan / Kashevnik, Alexey

Sensors (Basel, Switzerland)

2023 Volume 23, Issue 13

Abstract: Detection of fatigue is extremely important in the development of different kinds of preventive systems (such as driver monitoring or operator monitoring for accident prevention). The presence of fatigue for this task should be determined with ... ...

Abstract	Detection of fatigue is extremely important in the development of different kinds of preventive systems (such as driver monitoring or operator monitoring for accident prevention). The presence of fatigue for this task should be determined with physiological and objective behavioral indicators. To develop an effective model of fatigue detection, it is important to record a dataset with people in a state of fatigue as well as in a normal state. We carried out data collection using an eye tracker, a video camera, a stage camera, and a heart rate monitor to record a different kind of signal to analyze them. In our proposed dataset, 10 participants took part in the experiment and recorded data 3 times a day for 8 days. They performed different types of activity (choice reaction time, reading, correction test Landolt rings, playing Tetris), imitating everyday tasks. Our dataset is useful for studying fatigue and finding indicators of its manifestation. We have analyzed datasets that have public access to find the best for this task. Each of them contains data of eye movements and other types of data. We evaluated each of them to determine their suitability for fatigue studies, but none of them fully fit the fatigue detection task. We evaluated the recorded dataset by calculating the correspondences between eye-tracking data and CRT (choice reaction time) that show the presence of fatigue.
MeSH term(s)	Humans ; Eye Movements ; Heart Rate ; Videotape Recording ; Reaction Time ; Head Movements/physiology
Language	English
Publishing date	2023-07-06
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2052857-7
ISSN	1424-8220 ; 1424-8220
ISSN (online)	1424-8220
ISSN	1424-8220
DOI	10.3390/s23136197
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Changing profile of infective endocarditis during a 20-year observation period.

Tazina, Serafima / Fedorova, Tatiana / Semenenko, Natalya / Ilina, Yuliya / Mamonov, Alexander / Pavlov, Chavdar

Bratislavske lekarske listy

2023 Volume 124, Issue 8, Page(s) 622–629

Abstract: Background: Infective endocarditis (IE) is most often caused by bacteria.: Objectives: The aim of this work is the research of the dynamics of the clinical laboratory and instrumental methods of the diagnostics during the period of two decades.: ... ...

Abstract	Background: Infective endocarditis (IE) is most often caused by bacteria. Objectives: The aim of this work is the research of the dynamics of the clinical laboratory and instrumental methods of the diagnostics during the period of two decades. Methods: The data of 241 patients with infective endocarditis (IE) who were treated at the State Clinical Hospital named after Botkin S.P. was included in the research. 121 patients were observed from 2011 till 2020 (the first group) and 120 patients - from 1997 to 2004 (the second test group). These data included age and social structure of pathology, peculiarities of clinical picture, laboratory, and instrumental methods of research, as well as the outcome of the disease. We studied the concentrations of procalcitonin and presepsin in patients hospitalized after 2011. We observed pathomorphism of the modern IE. Results: To discover the bacteriological origin of the disease, we found the diagnostic evaluation of inflammation, procalcitonin, and presepsin activities, using C-reactive protein, important. We observed decrease in the number of general and hospital deaths. Conclusions: The knowledge of the IE peculiarities during the IE progression is essential for timely diagnosis and more accurate pathology prediction (Fig. 5, Ref. 38). Text in PDF www.elis.sk Keywords: infectious endocarditis, valve apparatus disease, thromboembolic complications, immunocomplex complications, procalcitonin, presepsin.
MeSH term(s)	Humans ; Procalcitonin ; Endocarditis, Bacterial/diagnosis ; Endocarditis, Bacterial/complications ; Endocarditis/diagnosis ; Endocarditis/complications ; Endocarditis/therapy ; C-Reactive Protein/analysis ; Retrospective Studies ; Peptide Fragments ; Lipopolysaccharide Receptors
Chemical Substances	Procalcitonin ; C-Reactive Protein (9007-41-4) ; presepsin protein, human ; Peptide Fragments ; Lipopolysaccharide Receptors
Language	English
Publishing date	2023-05-23
Publishing country	Slovakia
Document type	Journal Article
ZDB-ID	127421-1
ISSN	0006-9248
ISSN	0006-9248
DOI	10.4149/BLL_2023_097
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Decomposition of thiamethoxam in its combined use with hydroxycinnamic acids on potato and currant

Antonenko V.V. / Dovgilevich A.V. / Zubkov A.V. / Mamonov A.G. / Polikarpov A.S. / Savushkin Yu.N.

BIO Web of Conferences, Vol 66, p

2023 Volume 02004

Abstract: The experiments were conducted in the city of Moscow, on the territory of the Educational, Scientific, and Production Center named after V. I. Edelstein “Michurinsky Garden” FSBEI HE “RSAU-Moscow Agricultural Academy named after K.A. Timiryazev” and ... ...

Abstract	The experiments were conducted in the city of Moscow, on the territory of the Educational, Scientific, and Production Center named after V. I. Edelstein “Michurinsky Garden” FSBEI HE “RSAU-Moscow Agricultural Academy named after K.A. Timiryazev” and Field experimental station in the period 2021-2022 on the black currant and potato plantings. Laboratory analysis of plant material samples for the study of the content of residual amounts and determination of the dynamics of pesticides destruction was carried out in the Educational, Scientific, and Consulting Center “Agroecology of pesticides and agrochemicals”. The following preparations were used in the tests: insecticide − Actara, VDG (250 g/kg of thiamethoxam) and growth regulator − Zircon, R (0.1 g/l of hydroxycinnamic acids). In the conditions of the experiments, a separate application of the preparation Actara, VDG and its combined use with the preparation Zircon, R to establish the level of residual amounts of the insecticide Actara, VDG active substance, sampling was carried out within 21 days from the moment of spraying on all experiment options. The selected samples were analyzed under laboratory conditions using the high-performance liquid chromatography method. As a result of the study, it was found that the use of Actar, VDG together with the preparation Zircon, R on black currant plantings caused an acceleration of the destruction of the insecticide active substance in the leaves. Nevertheless, the combined use of the studied preparations did not reduce the level of thiamethoxam intake in the forming black currant berries. The use of the preparation Actara, VDG together with the double use of the growth regulator Zircon, R on potato plantings led to accelerated decay of thiamethoxam in the tops and less of its accumulation in tubers.
Keywords	Microbiology ; QR1-502 ; Physiology ; QP1-981 ; Zoology ; QL1-991
Language	English
Publishing date	2023-01-01T00:00:00Z
Publisher	EDP Sciences
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Influence of Sandstone Mineralogy on the Adsorption of Polar Crude Oil Components and Its Effect on Wettability

Mamonov, Aleksandr / Aslanidis, Panagiotis / Fazilani, Novia / Puntervold, Tina / Strand, Skule

Energy & fuels. 2022 Sept. 01, v. 36, no. 18

2022

Abstract: The crude oil–brine–rock (COBR) system is a combination of contacting phases where polar organic molecules in crude oil, inorganic ions from the brine phase, and charged mineral surfaces participate in complex interactions. One of the surface phenomena ... ...

Abstract	The crude oil–brine–rock (COBR) system is a combination of contacting phases where polar organic molecules in crude oil, inorganic ions from the brine phase, and charged mineral surfaces participate in complex interactions. One of the surface phenomena that occur in the COBR system is the adsorption of polar crude oil components, which can directly affect the capillary forces and wettability of the rock. The purpose of this research work was to determine polar organic component (POC) adsorption trends for sandstones of different origins and mineralogical compositions. Adsorption preferences for acidic and basic POCs were quantified by potentiometric titration during dynamic core flooding tests using modified crude oil. The influence of POC adsorption on wettability was investigated by evaluating capillary forces during the displacement of oil in a spontaneous imbibition (SI) process. The results of this work showed a clear relationship between the intensity of POC adsorption and sandstone mineralogy. Greater adsorption capacity and a predominant affinity for bases compared to that for acids were found in the sandstone material containing a sufficient amount of reactive illite clay minerals. On the other hand, the sandstone material consisting mainly of quartz with an insignificant content of kaolinite clay did not show a pronounced tendency to adsorb POCs. All the studied rock materials have also shown a significant impact of POC adsorption on capillary forces and wettability, confirmed during SI tests. As a result, a detailed mineralogical analysis along with crude oil chemistry is required to properly evaluate sandstone wettability and competently plan core flooding laboratory studies.
Keywords	adsorption ; clay ; energy ; illite ; imbibition ; kaolinite ; oils ; petroleum ; quartz ; sandstone ; titration ; wettability
Language	English
Dates of publication	2022-0901
Size	p. 10785-10793.
Publishing place	American Chemical Society
Document type	Article
ZDB-ID	1483539-3
ISSN	1520-5029 ; 0887-0624
ISSN (online)	1520-5029
ISSN	0887-0624
DOI	10.1021/acs.energyfuels.2c01540
Database	NAL-Catalogue (AGRICOLA)

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Book ; Online: Wegweiser auf der Großen Sibirischen Eisenbahn

Dmitriev-Mamonov, A.I / Lütschy, A / Zdziarski, A

2017

Institution	Russland / Ministerstvo Putej Soobščenija
Author's details	hrsg. vom Ministerium der Wegekommunikationen unter Red. von A. I. Dmitrijew-Mamonow und A. F. Zdziarski. Aus d. Russ. von A. Lütschg
Keywords	Eisenbahn ; UdSSR ; Sibirien
Language	German
Dates of publication	2017-1901
Size	1 Online-Ressource (602 Seiten)
Publisher	ZBW
Publishing place	Kiel ; Hamburg
Document type	Book ; Online
Database	ECONomics Information System

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Article: Adsorption of Polar Organic Components onto Sandstone Rock Minerals and Its Effect on Wettability and Enhanced Oil Recovery Potential by Smart Water

Mamonov, Aleksandr / Kvandal, Ove A / Puntervold, Tina / Strand, Skule

Energy & fuels. 2019 June 03, v. 33, no. 7

2019

Abstract: It is generally accepted that reservoir wettability is one of the most important parameters in oil recovery processes. In the published literature, it is believed that the state of reservoir wettability mainly depends on the adsorption or precipitation ... ...

Abstract	It is generally accepted that reservoir wettability is one of the most important parameters in oil recovery processes. In the published literature, it is believed that the state of reservoir wettability mainly depends on the adsorption or precipitation of oxygen and nitrogen compounds present in the heavy-end fractions of crude oil. However, the establishment of reservoir wetting is a more complex process that involves chemical interactions between all phases of the reservoir: rock mineral surfaces, formation water, and surface-active components in the crude oil. In this study, dynamic adsorption tests were performed by flooding modified crude oils with a low asphaltene content through outcrop sandstone cores. Adsorption of crude oil components was analyzed by comparing base number (BN) and acid number (AN) of the effluent oil samples with the known initial BN and AN of the crude oil. The experimental results showed that crude oil bases are more active than acids toward the silicate rock mineral surfaces. Within the pore volumes flooded, it was not possible to achieve equilibrium BN values because of the continuous adsorption of basic components. Spontaneous imbibition (SI) tests showed that the core sample behaved slightly water-wet after crude oil flooding. Ion-modified smart water as an imbibition fluid in tertiary mode has previously shown potential for wettability alteration and improved oil recovery. With an increase in the amount of injected crude oil through the core, a decrease in oil recovery and a decrease in smart water-enhanced oil recovery (EOR) potential were observed. SI oil recovery results indicate reduced positive capillary forces and a change in wetting toward a less water-wet state. Thus, the chemical composition of crude oil should be considered as an important parameter for a reliable estimation of the reservoir wettability state and EOR potential by smart water injection.
Keywords	acids ; adsorption ; asphaltenes ; chemical composition ; chemical interactions ; imbibition ; minerals ; nitrogen compounds ; oils ; oxygen ; petroleum ; sandstone ; silicates ; wettability
Language	English
Dates of publication	2019-0603
Size	p. 5954-5960.
Publishing place	American Chemical Society
Document type	Article
ZDB-ID	1483539-3
ISSN	1520-5029 ; 0887-0624
ISSN (online)	1520-5029
ISSN	0887-0624
DOI	10.1021/acs.energyfuels.9b00101
Database	NAL-Catalogue (AGRICOLA)

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Article: Contribution of Feldspar Minerals to pH during Smart Water EOR Processes in Sandstones

Mamonov, Aleksandr / Puntervold, Tina / Strand, Skule / Hetland, Bente / Andersen, Yngve / Wealth, Andrew / Nadeau, Paul H

Energy & fuels. 2019 Nov. 13, v. 34, no. 1

2019

Abstract: It has previously been suggested that a local pH increase at pore surfaces is responsible for desorption of polar oil components and wettability alteration in sandstone reservoirs, leading to increased oil recovery during smart water or low salinity ... ...

Abstract	It has previously been suggested that a local pH increase at pore surfaces is responsible for desorption of polar oil components and wettability alteration in sandstone reservoirs, leading to increased oil recovery during smart water or low salinity injection. The pH increase can be a result of cation exchanges at clay surfaces or at other mineral surfaces present in sandstone reservoirs, such as feldspars, which is the topic of this paper. In this study, static batch tests and dynamic sandpack flooding tests have been performed to investigate the pH development in the brine phase in contact with three common feldspars, Ab-feldspar (albite), An-feldspar (anorthite), and Or-feldspar (microcline). Temperature varied between 23 and 130 °C, and brine salinity varied from 0 ppm (deionized water) to 100 000 ppm NaCl in batch tests. The sandpacks were composed of 10 wt % feldspar and 90 wt % quartz and flooded with 100 000 and 1000 ppm brines. In all tests, equilibrated brine pH was monitored to study cation-exchange reactions between the feldspars and the brine phase. The main results in this study showed that all three feldspars tested, Ab-feldspar, An-feldspar, and Or-feldspar, caused a pH increase in the brine phase at all temperatures and salinities tested and can therefore influence pH during waterflooding of sandstone reservoirs. There was a general decrease in ion exchange and pH increment when the test temperature increased for all three feldspars. The least stable feldspar, or the most reactive feldspar, in cation-exchange processes seemed to be An-feldspar, causing the highest pH at most conditions, also being least affected by increasing brine salinity.
Keywords	cation exchange ; cations ; clay ; desorption ; feldspar ; oils ; pH ; quartz ; salinity ; sandstone ; sodium chloride ; temperature ; wettability
Language	English
Dates of publication	2019-1113
Size	p. 55-64.
Publishing place	American Chemical Society
Document type	Article
ZDB-ID	1483539-3
ISSN	1520-5029 ; 0887-0624
ISSN (online)	1520-5029
ISSN	0887-0624
DOI	10.1021/acs.energyfuels.9b01064
Database	NAL-Catalogue (AGRICOLA)

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Article: Role of sweetclover and phacelia in agriculture ecology improvement for droughty left-bank areas of Saratov region

Titov, V. N / Mamonov, A. N

Russian agricultural sciences. 2013 July, v. 39, no. 4

2013

Abstract: Ecological pollution and physical degradation of soil depend strongly on anthropogenic action on it. The role of such legumes as biennial yellow sweetclover, annual white sweetclover, and plants of Boraginaceae family—lacy phacelia and blue curls—in ... ...

Abstract	Ecological pollution and physical degradation of soil depend strongly on anthropogenic action on it. The role of such legumes as biennial yellow sweetclover, annual white sweetclover, and plants of Boraginaceae family—lacy phacelia and blue curls—in improvement of physical and chemical soil properties was investigated. An ecologically safe way for soil fertility increase under droughty conditions is offered. Use of both species of sweetclover and one species of phacelia tanacetifolia as green manure in crop rotations are recommended.
Keywords	Melilotus albus ; Melilotus officinalis ; Phacelia tanacetifolia ; crop rotation ; drought ; ecology ; green manures ; legumes ; pollution ; soil chemical properties ; soil degradation ; soil fertility ; soil physical properties ; Russia
Language	English
Dates of publication	2013-07
Size	p. 338-341.
Publishing place	Springer-Verlag
Document type	Article
ISSN	1068-3674
DOI	10.3103/S1068367413040228
Database	NAL-Catalogue (AGRICOLA)

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Article: Agrochemistry. Soil Science. Role of Sweetclover and Phacelia in Agriculture Ecology Improvement for Droughty Left-Bank Areas of Saratov Region

Titov, V. N. / Mamonov, A. N.

Russian agricultural sciences

2013 Volume 39, Issue 4, Page(s) 338

Language	English
Document type	Article
ZDB-ID	1172157-1
ISSN	0735-2700 ; 1068-3674
Database	Current Contents Nutrition, Environment, Agriculture

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Article ; Online: Thermal motions of the E. coli glucose-galactose binding protein studied using well-sampled, semi-atomistic simulations.

Cashman, D J / Mamonov, A B / Bhatt, D / Zuckerman, D M

Current topics in medicinal chemistry

2010 Volume 11, Issue 2, Page(s) 211–220

Abstract: The E. coli glucose-galactose chemosensory receptor is a 309 residue, 32 kDa protein consisting of two distinct structural domains. We used two computational methods to examine the protein's thermal fluctuations, including both the large-scale ... ...

Abstract	The E. coli glucose-galactose chemosensory receptor is a 309 residue, 32 kDa protein consisting of two distinct structural domains. We used two computational methods to examine the protein's thermal fluctuations, including both the large-scale interdomain movements that contribute to the receptor's mechanism of action, as well as smaller-scale motions. We primarily employ extremely fast, "semi-atomistic" Library-Based Monte Carlo (LBMC) simulations, which include all backbone atoms but "implicit" side chains. Our results were compared with previous experiments and all-atom molecular dynamics (MD) simulation. Both LBMC and MD simulations were performed using both the apo and glucose-bound form of the protein, with LBMC exhibiting significantly larger fluctuations. The LBMC simulations are in general agreement with the disulfide trapping experiments of Careaga & Falke (J. Mol. Biol., 1992, Vol. 226, 1219-35), which indicate that distant residues in the crystal structure (i.e. beta carbons separated by 10 to 20 angstroms) form spontaneous transient contacts in solution. Our simulations illustrate several possible "mechanisms" (configurational pathways) for these fluctuations. We also observe several discrepancies between our calculations and experimental rate constants. Nevertheless, we believe that our semi-atomistic approach could be used to study fluctuations in other proteins, perhaps for ensemble docking or other analyses of protein flexibility in virtual screening studies.
MeSH term(s)	Amino Acids/metabolism ; Apoenzymes/chemistry ; Apoenzymes/metabolism ; Calcium-Binding Proteins/chemistry ; Calcium-Binding Proteins/metabolism ; Crystallography, X-Ray ; Differential Thermal Analysis ; Disulfides/chemistry ; Escherichia coli ; Galactose/metabolism ; Glucose/metabolism ; Holoenzymes/chemistry ; Holoenzymes/metabolism ; Models, Molecular ; Molecular Dynamics Simulation ; Monosaccharide Transport Proteins/chemistry ; Monosaccharide Transport Proteins/metabolism ; Periplasmic Binding Proteins/chemistry ; Periplasmic Binding Proteins/metabolism ; Protein Binding ; Protein Conformation
Chemical Substances	Amino Acids ; Apoenzymes ; Calcium-Binding Proteins ; Disulfides ; Holoenzymes ; Monosaccharide Transport Proteins ; Periplasmic Binding Proteins ; galactose-binding protein ; Glucose (IY9XDZ35W2) ; Galactose (X2RN3Q8DNE)
Language	English
Publishing date	2010-10-13
Publishing country	United Arab Emirates
Document type	Journal Article ; Research Support, N.I.H., Extramural ; Research Support, U.S. Gov't, Non-P.H.S.
ZDB-ID	2064823-6
ISSN	1873-4294 ; 1568-0266
ISSN (online)	1873-4294
ISSN	1568-0266
DOI	10.2174/156802611794863607
Database	MEDical Literature Analysis and Retrieval System OnLINE

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