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Land use in agricultural landscapes with chernozems contaminated after Chernobyl accident: Can we be confident in radioecological safety of plant foodstuff?

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International Soil and Water Conservation Research 2019年第2期7卷 158-166页

作者： olga Komissarova Tatiana Paramonova Radioecology&Ecotoxicology Department Soil Science FacultyLomonosov Moscow State UniversityLeninskie Gory 1-12Moscow 119991Russia

Agricultural land use in the area of the post-Chemobyl Plavsk radioactive hotspot (Tula region,Central Russia) has raised a problem of radioecological safety of obtained plant *** of 137Cs activities and inventories in components of 'soil-plant' systems of the territory has been conducted in 2014-2017 in 10 agrosystems and 2 semi-natural *** was revealed that density of 137Cs contamination of arable chernozems and alluvial calcareous soils nowadays varies in a range 140-220 kBq/m2 and exceeds radiation safety standard by^3.5-6 *** plowing of the arable soils up to 30-cm in 1986-1987 resulted in decreasing of 137Cs inventories in rooting zone by ≈ 70% for crops cultivated with shallow disk plowing (wheat,barley),and by ≈ 35% for crops cultivated with middle plowing (buckwheat,amaranth,white mustard).The investigated plants and their compartments can be grouped on the basis of transfer factor values as follows:maize (stems and leaves)> amaranth> bromegrass > vegetation of dry meadow,galega,sunflower (seeds),vegetation of wet meadow > maize (grain),soybean (pods),barley (grain),buckwheat (grain),potatoes (tubers)> white mustard (seeds),wheat (grain).It is noticeable that generative plant compartments are characterized by less 137Cs activities in comparison with stems and leaves;and that 137Cs root uptake is not coincide with total flux of mineral nutrients in 'soil-plant' *** sum,137Cs soil-to-plant transfer in the area of the Plavsk radioactive hotspot is characterized by considerable discrimination,so 137Cs activities in plants are completely in accordance with national standards.

关键词： Radioactive soil contamination Caesium-137 137Cs Arable soils 'Soil-plant' system Chernobyl accident Radioecologically safe land use

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Creating technical heritage object replicas in a virtual environment

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Frontiers of Mechanical Engineering 2016年第1期11卷 108-115页

作者： olga EGOROVA Dmitry SHCHERBININ Theory of Mechanisms and Machines Department Bauman Moscow State Technical University Moscow 10505 Russia S. I. Vavilov Institute for the History of Science and Technology of RAS Moscow Russia

The paper presents innovative informatics methods for creating virtual technical heritage replicas, which are of significant scientific and practical importance not only to researchers but to the public in general. By performing 3D modeling and animation of aircrafts, spaceships, architectural-engineering buildings, and other technical objects, the process of teaming is achieved while promoting the preservation of the replicas for future generations. Modem approaches based on the wide usage of computer technologies attract a greater number of young people to explore the history of science and technology and renew their interest in the field of mechanical engineering.

关键词： 3D document history of science and technology technical knowledge popularization virtual environment replica mechanism and machine science (MMS)

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Estrogen, estrogen receptors, and hepatocellular carcinoma: Are we there yet?

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World Journal of Gastroenterology 2018年第1期24卷 1-4页

作者： olga A Sukocheva School of Health Sciences Flinders University of South Australia

A protective role of the sex steroid hormone estrogenin hepatocellular carcinoma(HCC) was suggested a few decades ago according to clinical data showing higher HCC morbidity and mortality among males. Several recent studies further confirmed the anti-cancer effects of estrogen in the liver. However, it remains to be identified how to exploit estrogen signalling within clinical settings for HCC treatment. There are several unresolved issues related to the estrogen pathway in liver cells. The main problems include the absence of a clear understanding of which estrogen receptor(ER) isoform is predominantly expressed in normal and malignant liver cells, the ER isoform expression difference between males and females, and which ER isoform should be targeted when designing HCC therapy. Some of those questions were recently addressed by Iyer and coauthors. The current editorial review critically analyses the study by Iyer et al(WJG, 2017) that investigated the expression of ER subtypes in liver samples collected from patients with a healthy liver, hepatitis C virus cirrhosis, and HCC. ER presence was evaluated in association with gender, intracellular localization, inflammation marker NF-kB, and proliferation-related effector cyclin D1. The study limitations and advantages are discussed in light of recent advances in the HCC and estrogen signalling areas.

关键词： hepatocellular carcinoma hepatitis C virus hepatitis Estrogen receptors cirrhosis

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样本不均衡情况下的航空发动机轴承故障诊断方法

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郑州航空工业管理学院学报 2024年第4期42卷 5-11页

作者：王海泉王亚辉杨岳毅 Kurkova olga Petrovna 温盛军陈乐瑞路成钢中原工学院中原彼得堡航空学院(智能感知与仪器学院) 河南郑州450007 中原工学院自动化与电气工程学院河南郑州450007 俄罗斯圣彼得堡国立宇航与仪器制造大学电子与激光仪器系圣彼得堡14-51

航空发动机滚动轴承工作在高温、高压、高转速的恶劣环境下,故障率高,因此对于其故障的准确识别和判断尤为重要。但由于轴承故障的偶发性,各类故障样本不均衡的问题非常突出,大大影响了基于数据的模式识别方法的准确性。本文提出了一种... 详细信息

航空发动机滚动轴承工作在高温、高压、高转速的恶劣环境下,故障率高,因此对于其故障的准确识别和判断尤为重要。但由于轴承故障的偶发性,各类故障样本不均衡的问题非常突出,大大影响了基于数据的模式识别方法的准确性。本文提出了一种样本不均衡条件下的航空发动机滚动轴承智能诊断方法,采用合成少数类过采样方法进行样本平衡,在完成时频域特征提取和特征选择之后,利用改进蜂群算法优化后的随机森林策略实现轴承故障分类,并在凯斯西储大学轴承数据集和实验室构建的模拟航空发动机滚动轴承数据集上进行了实验验证。结果显示在凯斯西储大学中度不均衡数据集下,故障识别的准确率为98.30%,在重度不均衡数据集下的分类结果为96.30%。在实验室构建的模拟航空发动机滚动轴承实验台上,不均衡数据集的分类结果为97.65%,重度不均衡数据集的分类准确率为95.67%。相关实验证明本文所提算法能够有效完成不均衡样本下的航空发动机滚动轴承故障诊断任务。

关键词：航空发动机轴承故障诊断数据不平衡过采样蜂群算法

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Cell-based therapies for neural replacement strategies in stroke-related neurodegeneration： neurophysiological insights into stem progenitor cell neurogenesis within a host environment

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Neural Regeneration Research 2018年第8期13卷 1350-1351页

作者： olga Kopach Tatyana Pivneva Department of Clinical and Experimental Epilepsy Institute of NeurologyUniversity College London London UK Department ot Sensory Signalling Bogomoletz Institute oI Physiology KyivUkraine State Institute of Genetic and Regenerative Medicine Kyiv Ukraine

The restricted neurogenesis limits the brain ability to overcome neuronal cell death following ischemic lesion：Failure of the damaged brain to regenerate following cerebral ischemia results in functional deficits those are most often irreversible and can further deteriorate,causing mortality and severe disability,progressive memory loss and cognitive impairments,known as dementia.

关键词： neurophysiological insights into stem progenitor cell neurogenesis within a host environment

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Role of presynaptic calcium stores for neural network dysfunction in Alzheimer＇s disease

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Neural Regeneration Research 2018年第6期13卷 977-978页

作者： Chommanad Lerdkrai olga Garaschuk Institute of Physiology Department Neurophysiology Eberhard KarlsUniversity of Tubingen Tubingen Germany Department of Physiology Faculty of Veterinary Medicine Kasetsart UniversityBangkok Thailand

Alzheimer’s disease（AD）is the most common form of dementia representing a major problem for public *** 2017 there were an estimated 50 million patients worldwide and this number is expected to almost double every 2... 详细信息

关键词： In Role of presynaptic calcium stores for neural network dysfunction in Alzheimer’s disease AD

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Transparent BoundaryConditions for ElasticAnisotropic VTIMedia:Axially Symmetric Case

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Communications in Computational Physics 2012年第2期11卷 541-554页

作者： olga Podgornova Schlumberger Moscow Research 13Pudovkina119285Russia.

Transparent boundary conditions(TBCs)for anisotropic vertical transverse isotropic VTI medium are formulated for the axially symmetric *** high accuracy of the derived TBCs and their long-time stability are demonstrated in numerical *** TBCs are represented in terms of the vertical component of the velocity vector and tangential component of the stress tensor that facilitates the easy implementation of the boundary condition into the finite-difference staggered-grid scheme.

关键词： Nonreflecting boundary conditions anisotropy elastodynamics

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Role of serotonin in modulating the development and function of adult-born neurons in the olfactory bulb

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Neural Regeneration Research 2022年第6期17卷 1253-1254页

作者： Natalie Fomin-Thunemann olga Garaschuk Department of Biomedical Engineering Boston UniversityBostonMAUSA Institute of Physiology Department NeurophysiologyEberhard Karls University of TübingenTübingenGermany

The neuromodulatory transmitter serotonin(5-hydroxytryptamine,5-HT)is synthesized by neurons located in the brainstem,which project more or less densely to the entire central nervous system(Charnay and Leger,2010).Serotonin regulates a variety of physiological functions,including food intake,reward,reproduction,sleep-wake cycle,memory,cognition,emotion,and mood(Charnay and Leger,2010).

关键词： serotonin intake modulator

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Patent foramen ovale closure in non-lacunar cryptogenic ischemic stroke:where are we now?

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Journal of Geriatric Cardiology 2021年第1期18卷 67-74页

作者： AdriàARBOIX olga PARRA Josefina ALIÓ Cerebrovascular Division Department of NeurologyHospital Universitari del Sagrat CorUniversitat de BarcelonaBarcelonaCataloniaSpain Department of Pneumology Hospital Universitari del Sagrat CorUniversitat de BarcelonaBarcelonaCataloniaSpain Department of Cardiology Hospital Universitari de BellvitgeL’Hospitalet de LlobregatBarcelonaCataloniaSpain

Patent foram ovale(PFO)is the most common anatomical cause of an interarterial *** is usually asymptomatic but may cause paradoxical embolism and is a risk factor for non-lacunar cryptogenic cerebral ischemia in young *** the first clinical trials did not show a significant superiority of PFO closure in the secondary prevention of cerebral ischemia as compared with standard antithrombotic treatment,six subsequent randomized clinical trials(CLOSURE I,PC Trial,RESPECT,CLOSE,REDUCE,and DEFENSE-PFO)performed in a sample of cryptogenic stroke in patients aged 60 years or younger provided evidence of a significant reduction of recurrent cerebral ischemia after percutaneous PFO ***,the use of percutaneous PFO closure cannot be generalized to the entire population of patients with cerebral ischemia and PFO,but it is indicated in highly selected patients with non-lacunar cryptogenic cerebral infarction with a large right-to-left shunt,an atrial septal aneurysm and no evidence of atrial fibrillation,as well as in association with antithrombotic treatment for an optimal secondary prevention of cerebral ischemia.

关键词： PFO Patent foramen ovale closure in non-lacunar cryptogenic ischemic stroke where are we now

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Comparison Analysis of Longitudinal Electrical Conductivity Distribution and Seismic Tomography Velocity Models for the Central Tien Shan Region

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Journal of Earth Science 2023年第2期34卷 580-587页

作者： olga Zabinyakova Elena Bataleva Irina Medved Research Station of the Russian Academy of Sciences in Bishkek City Bishkek 720049Kyrgyzstan Sobolev Institute of Geology and Mineralogy Siberian Branch of the Russian Academy of SciencesNovosibirsk 630090Russia Trofimuk Institute of Petroleum Geology and Geophysics Siberian Branch of the Russian Academy of SciencesNovosibirsk 630090Russia

The paper is dedicated to consider the approach of longitudinal electrical conductivity maps construction for Central Tien Shan region and to complete the comparison analysis of these maps with related seismic tomography *** results of joint analysis of longitudinal electrical conductivity distribution and seismic tomography velocity models with respect to geological and geophysical senses allow to confirm the already known and to establish the new patterns of structure and geodynamics of the Tien Shan segment of Central Asia such as the manifestation of characteristic structural ensembles,reflection of the longitudinal and transverse segmentation of the Tien Shan,the existence within the framework of a“single”orogen of segments with different near-surface and deep structure and morphological *** well,the correlation between the velocity characteristics and geoelectric properties was *** correlation allows to identify signs of reflection of fault structures in geophysical fields and to clarify the territorial and structural position of both visible and hidden ***,in the paper,the geological interpretation of geophysical anomalies is considered.

关键词： profile magnetotelluric soundings longitudinal electrical conductivity map seismic tomography velocity model Tien Shan geophysics

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