Pathophysiological substantiation of the specificity of ophthalmic morbidity in the Arctic region

2021 ◽  
Vol 22 (3) ◽  
pp. 42-46
Author(s):  
A. N. Zhekalov ◽  
◽  
I. U. Mishin ◽  
Keyword(s):  
Inflammatory Diseases ◽  
Tear Film ◽  
Arctic Region ◽  
The Body ◽  
The Arctic ◽  
Polar Night ◽  
Novaya Zemlya Archipelago ◽  
Novaya Zemlya ◽  
Geographical Factors ◽  
The Arctic Region

Aim. To carry out a pathophysiological substantiation of the specificity of diseases of the organ of vision, developing under the influence of a complex of climatic and geographical factors of the Arctic region. Materials and methods. Using a retrospective epidemiological method of case-control study on the basis of branch No. 8 of FGKU 1469 VMKG of the Ministry of Defense of Russia, an analysis of the morbidity structure by ophthalmological profile for a three-year period (2018-2020) among military personnel aged 18 to 45 years military service in the Novaya Zemlya archipelago, Belushya Guba village. The method of analytical observation and data recording was used to assess the complex of unfavorable climatic and geographical factors of the Arctic region on the example of the Novaya Zemlya archipelago, Belushya Guba village. On the basis of an integral assessment of epidemiological and climatogeographic observations, a pathophysiological substantiation of the specificity of nosological groups of diseases of the organ of vision, developing under the influence of a complex of unfavorable factors of the Arctic region, is given. Results. The study involved 237 people. During the study period, 540 requests for ophthalmological help were registered. Of these, 64.26% are pathologies of inflammatory genesis, 32.6% are refractive disorders, 3.14% are diseases, the pathogenesis of which is associated with metabolic disorders in the body. The pathophysiological substantiation of the revealed morbidity structure according to the ophthalmological profile is due to the influence of a complex of unfavorable climatic and geographical factors of the Arctic region. Under the influence of wind and low temperatures, the structure of the tear film changes, the secretion of the meibomian glands becomes more viscous, as a result of which its concentration in the tear fluid decreases, and the eyes lose their protective barrier. The congealed secret clogs the ducts of the meibomian glands, which leads to their inflammation – meibomyitis. In turn, the insufficiency of the tear film provokes a decrease, and in more severe cases, a complete loss of natural tear production and the development of dry eye syndrome. The development of acute and chronic conjunctivitis is facilitated by a decrease in the reactivity of the body due to hypovitaminosis against the background of exposure to irritating climatic factors. With inflammation of the mucous membrane of the eyelids, the frequency of inflammatory diseases of the lacrimal ducts and the lacrimal gland increases, which causes obstruction of the lacrimal tubules and hyperfunction of the lacrimal glands. On a polar night, the perception of bright lighting is aggravated, a long stay near which provokes the development of a spasm of accommodation and subsequently its habitual excessive stress. Lack of natural light during the polar night is a predisposing factor for the development of myopia. In addition, during the polar night, there is a high probability of developing A-vitamin deficiency, which results in impaired night vision, damage to the conjunctiva, and in more severe cases, the cornea. In the spring or early summer, when there is snow, and solar activity is high, the ultraviolet rays reflected from the snow enter the eyes, causing a retinal burn, ultraviolet ophthalmia develops. Conclusion. The impact of a complex of climatic and geographic factors of the Arctic region on the body provokes a restructuring of regulatory physiological processes and the launch of pathogenetic mechanisms leading to the emergence and development of inflammatory diseases of the eye and its accessory apparatus, refractive disorders, as well as pathology, which is based on metabolic disorders.

scholarly journals Assessment of the pathogenesis of visual impairment naval specialists of the arctic zone of the russian federation during the polar night

2022 ◽  
Vol 7 (4) ◽  
pp. 84-89
Author(s):  
A. N. Zhekalov ◽  
I. Yu. Mishin
Keyword(s):  
Visual Impairment ◽  
Russian Federation ◽  
Arctic Region ◽  
The Arctic ◽  
Arctic Zone ◽  
Polar Night ◽  
Novaya Zemlya Archipelago ◽  
Novaya Zemlya ◽  
The Russian Federation ◽  
The Arctic Region

Introduction. The climatogeographic conditions of the Arctic Zone of the Russian Federation are determined by the proximity to the North Pole of the Earth and are characterized by a number of certain cyclical changes that do not take place in the middle latitudes — the polar day and the polar night. The high-latitude location determines the long period of the polar night, lasting from 98 to 133 days. Being the hallmark of the Arctic, the polar night is an integral part of service in the Arctic region, it has an impact on every geographically involved person, without exception.Purpose of work. To assess the mechanisms of the pathogenesis of visual impairment that develop during the polar night in naval specialists.Materials and research methods. The study involved 92 people. The surveyed contingent is male contract servicemen of the Navy, aged from 21 to 45 years. The analysis of the morbidity structure according to the ophthalmological profile was carried out during the polar night from November 20, 2020 to January 20, 2021 using an epidemiological method of a case-control study. The assessment of unfavorable climatic and geographical factors of the Arctic region during the polar night was carried out by the method of analytical observation and data recording from November 20, 2020 to January 20, 2021 using the example of the Novaya Zemlya archipelago, Belushya Guba village. On the basis of an integral analysis of epidemiological indicators, climatogeographic and clinical and morphological observations, a pathophysiological assessment of diseases of the organ of vision, developing during the polar night in naval specialists, was carried out.Research results show a high level of ophthalmological morbidity during the polar night among naval specialists serving on the Novaya Zemlya archipelago.Conclusions. Climatogeographic factors of the Arctic region have a polyetiological effect on the formation of mechanisms of pathogenesis of disorders of visual functions that develop in naval specialists during the polar night.

scholarly journals Features of creating multi-time thematic animations of the Arctic environment pollution on the example of Novaya Zemlya

2019 ◽  
Vol 1 ◽  
pp. 1-1
Author(s):  
Andrey Medvedev ◽  
Natalia Alekseenko ◽  
Maria Arsentyeva
Keyword(s):  
Time Scales ◽  
Radioactive Contamination ◽  
Arctic Region ◽  
Test Site ◽  
Nuclear Test ◽  
The Arctic ◽  
Novaya Zemlya Archipelago ◽  
Novaya Zemlya ◽  
The Creation ◽  
The Arctic Region

<p><strong>Abstract.</strong> The Arctic region is currently at the next stage of increased interest not only from the Arctic States, but also from the entire world community. The main pollutants in the region are oil and gas products, heavy metals, chemical and radioactive contamination. The Arctic region of the Russian Federation has experienced a strong anthropogenic impact of radionuclides due to the use of nuclear energy. The main source of pollution is nuclear testing. About 132 tests were conducted on Novaya Zemlya, including 87 atmospheric, 3 underwater and 42 underground tests. Another source of radioactive contamination is the operation of the naval and civil nuclear fleet, as well as nuclear power plants (on the Kola Peninsula and in Bilibino). Until 1963, most of the tests were carried out in the atmosphere and under water, but after the signing of the Moscow Treaty on August 5, 1963, which prohibits the testing of nuclear weapons in three environments (under water, in the atmosphere and outer space), all tests were carried out underground, in tunnels and wells.</p><p>The object of research and mapping is the territory of the Novaya Zemlya archipelago and the nuclear test site located on it. On the territory of the nuclear test site constantly there was an assessment of the radioecological situation. The scientific community is interested in the processes taking place on the New Earth. The territory of the archipelago is constantly involved in various Arctic programs aimed at monitoring the level of environmental pollution and reducing the number of sources of pollution.</p><p>The aim of this work is to create multi-time animations of nuclear tests and the results of radionuclide pollution. These animated cartographic images differ not only in their time scales, but also a large set of qualitative and quantitative characteristics that characterize the results of anthropogenic influence.</p><p>As sources for creation of cartographic animations were: field data, remote sensing data (RS), Open sources, marine navigation maps, DEM’s (AsterDem, ArcticDem, GEBCO), meteorological data, thematic maps (including atlases), topographic maps, literary sources. The main part of the information about Novaya Zemlya archipelago was taken from the works of the Arctic marine complex expedition, which are devoted to the nature, history, archeology and culture of the archipelago. To obtain complete information about the explosions and their energy release ranges, additional open sources were used, from which it is possible to learn about the type of explosion, its power and location (geographical coordinates).</p><p>Dynamic geo-imagery was developed and established by the following method: study of object mapping and the collection of primary spatial data – creation script dynamic geo-imagery – the creation of a geodatabase of research – the creation of the thematic maps and layout of geo-imagery in the graphic editor – create animations with different time scales.</p><p>During the creation of cartographic animations based on the collected data, a multi-time multi-scale cartographic animation was developed, which allowed using the original graphical solution to visualize three interconnected time scales, which allowed to visualize the processes of infiltration and propagation of radioactive inert gases.</p>

Nuclear icebreaker fleet and power supply on the basis of floating power units

2018 ◽  
Vol 35 (4) ◽  
pp. 110-113
Author(s):  
V. A. Tupchienko ◽  
H. G. Imanova
Keyword(s):  
Foreign Policy ◽  
Power Supply ◽  
Nuclear Power ◽  
Arctic Region ◽  
Nuclear Industry ◽  
The Arctic ◽  
Far North ◽  
The Arctic Region

The article deals with the problem of the development of the domestic nuclear icebreaker fleet in the context of the implementation of nuclear logistics in the Arctic. The paper analyzes the key achievements of the Russian nuclear industry, highlights the key areas of development of the nuclear sector in the Far North, and identifies aspects of the development of mechanisms to ensure access to energy on the basis of floating nuclear power units. It is found that Russia is currently a leader in the implementation of the nuclear aspect of foreign policy and in providing energy to the Arctic region.

Chemical Composition of Atmospheric Aerosol in the Arctic Region and Adjoining Seas along the Routes of Marine Expeditions in 2018–2019

2020 ◽  
Vol 33 (5) ◽  
pp. 480-489
Author(s):  
L. P. Golobokova ◽  
T. V. Khodzher ◽  
O. N. Izosimova ◽  
P. N. Zenkova ◽  
A. O. Pochyufarov ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Atmospheric Aerosol ◽  
Arctic Region ◽  
The Arctic ◽  
The Arctic Region

Estimating Friction Reduction ForCasing Operations in High-Angle Wells in The Arctic Region - A Russia Case History

2011 ◽  
Author(s):  
Chimerebere Onyekwere Nkwocha ◽  
Evgeny Glebov ◽  
Alexey Zhludov ◽  
Sergey Galantsev ◽  
David Kay
Keyword(s):  
Case History ◽  
Arctic Region ◽  
Friction Reduction ◽  
The Arctic ◽  
High Angle ◽  
The Arctic Region

scholarly journals Temperature and Relative Humidity Profile Retrieval from Fengyun-3D/HIRAS in the Arctic Region

2021 ◽  
Vol 13 (10) ◽  
pp. 1884
Author(s):  
Jingjing Hu ◽  
Yansong Bao ◽  
Jian Liu ◽  
Hui Liu ◽  
George P. Petropoulos ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Real Time ◽  
Wide Spectrum ◽  
Warm Season ◽  
Arctic Region ◽  
Cold Season ◽  
The Arctic ◽  
Practical Applications ◽  
A New Technique ◽  
The Arctic Region

The acquisition of real-time temperature and relative humidity (RH) profiles in the Arctic is of great significance for the study of the Arctic’s climate and Arctic scientific research. However, the operational algorithm of Fengyun-3D only takes into account areas within 60°N, the innovation of this work is that a new technique based on Neural Network (NN) algorithm was proposed, which can retrieve these parameters in real time from the Fengyun-3D Hyperspectral Infrared Radiation Atmospheric Sounding (HIRAS) observations in the Arctic region. Considering the difficulty of obtaining a large amount of actual observation (such as radiosonde) in the Arctic region, collocated ERA5 data from European Centre for Medium-Range Weather Forecasts (ECMWF) and HIRAS observations were used to train the neural networks (NNs). Brightness temperature and training targets were classified using two variables: season (warm season and cold season) and surface type (ocean and land). NNs-based retrievals were compared with ERA5 data and radiosonde observations (RAOBs) independent of the NN training sets. Results showed that (1) the NNs retrievals accuracy is generally higher on warm season and ocean; (2) the root-mean-square error (RMSE) of retrieved profiles is generally slightly higher in the RAOB comparisons than in the ERA5 comparisons, but the variation trend of errors with height is consistent; (3) the retrieved profiles by the NN method are closer to ERA5, comparing with the AIRS products. All the results demonstrated the potential value in time and space of NN algorithm in retrieving temperature and relative humidity profiles of the Arctic region from HIRAS observations under clear-sky conditions. As such, the proposed NN algorithm provides a valuable pathway for retrieving reliably temperature and RH profiles from HIRAS observations in the Arctic region, providing information of practical value in a wide spectrum of practical applications and research investigations alike.All in all, our work has important implications in broadening Fengyun-3D’s operational implementation range from within 60°N to the Arctic region.

scholarly journals Advancement into the Arctic Region for Bioactive Sponge Secondary Metabolites

Marine Drugs ◽  
2011 ◽  
Vol 9 (11) ◽  
pp. 2423-2437 ◽  
Author(s):  
Samuel Abbas ◽  
Michelle Kelly ◽  
John Bowling ◽  
James Sims ◽  
Amanda Waters ◽  
...  
Keyword(s):  
Secondary Metabolites ◽  
Arctic Region ◽  
The Arctic ◽  
The Arctic Region

scholarly journals High-time resolved radon-progeny measurements in the Arctic region (Svalbard Islands, Norway): results and potentialities

2017 ◽  
Author(s):  
Roberto Salzano ◽  
Antonello Pasini ◽  
Antonietta Ianniello ◽  
Mauro Mazzola ◽  
Rita Traversi ◽  
...  
Keyword(s):  
Limit Of Detection ◽  
Atmospheric Stability ◽  
Arctic Region ◽  
Climatic Conditions ◽  
The Arctic ◽  
Radon Emanation ◽  
Radon Progeny ◽  
Time Resolved ◽  
Scientific Challenge ◽  
The Arctic Region

Abstract. The estimation of radon progeny in the Arctic region represents a scientific challenge due to the required low limit of detection in consideration of the limited radon emanation associated with permafrost dynamics. This preliminary study highlighted, for the first time, the possibility to monitor radon progeny in the Arctic region with a higher time resolution. The composition of the radon progeny offered the opportunity to identify air masses dominated by long-range transport, in presence or not of near-constant radon progeny instead of long and short lived progenies. Furthermore, the different ratio between radon and thoron progenies evidenced the contributions of local emissions and atmospheric stability. Two different emanation periods were defined in accordance to the permafrost dynamics at the ground and several accumulation windows were recognized coherently to the meteo-climatic conditions occurring at the study site.

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