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Partnership for eXtreme Xtallography (PX^(2))—A state-of-the-art experimental facility for extreme-conditions crystallography: A case study of pressure-induced phase transition in natural ilvaite

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Matter and Radiation at Extremes 2022年第2期7卷 62-71页

作者： Jingui Xu Dongzhou Zhang sergey n.tkachev Przemyslaw K.Dera School of Ocean and Earth Science and Technology Hawai’i Institute of Geophysics and PlanetologyUniversity of Hawai’i at ManoaHonoluluHawaii 96822USA Center for Advanced Radiation Sources University of ChicagoChicagoIllinois 60437USA

Single-crystal x-ray diffraction(SCXRD)is an important tool to study the crystal structure and phase transitions of crystalline materials at elevated *** Partnership for eXtreme Xtallography(PX^(2))program at the GSECARS 13-BM-C beamline of the Advanced Photon Source aims to provide state-of-the-art experimental capabilities to determine the crystal structures of materials under extreme conditions using ***^(2) provides a focused x-ray beam(12318μm^(2))at a monochromatic energy of 28.6 ***-pressure SCXRD experiments are performed with a six-circle diffractometer and a Pilatus3 photon-counting detector,facilitated by a membrane system for remote pressure control and an online ruby fluorescence system for pressure *** efficient,high-quality crystal structure determination at PX^(2) is exemplified by a study of pressure-induced phase transitions in natural ilvaite[CaFe^(2+)_(2 )Fe^(3+)Si_(2)O_(7)O(OH),P2_(1)/a space group].Two phase transitions are observed at high *** SCXRD data confirm the already-known ilvaite-I(P2_(1)/a)→ilvaite-II(Pnam)transformation at 0.4(1)GPa,and,a further phase transition is found to occur at 22.8(2)GPa where ilvaite-II transforms into ilvaite-III(P2_(1)/a).The crystal structure of the ilvaite-III is solved and refined in the P2_(1)/a space *** addition to the ilvaite-I→ilvaite-II→ilvaite-III phase transitions,two minor structural modifications are observed as discontinuities in the evolution of the FeO6 polyhedral geometries with pressure,which are likely associated with magnetic transitions.

关键词： phase extreme transitions

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Elasticity of Single-Crystal Fe-Bearing Diopside at High-Pressure Conditions

Elasticity of Single-Crystal Fe-Bearing Diopside at High-Pre...

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中国矿物岩石地球化学学会第17届学术年会

作者：范大伟 Suyu Fu Chang Lu Jingui Xu Yanyao Zhang sergey n.tkachev Vitali B.Prakapenka Jungfu Lin Key Laboratory of High Temperature and High Pressure Study of the Earth's Interior Institute of GeochemistryChinese Academy of Sciences Department of Geological Sciences Jackson School of GeosciencesThe University of Texas at Austin Center for Advanced Radiation Sources University of Chicago

The monoclinic mineral diopside (CaMgSiO) is the calcium end member of Ca-rich clinopyroxene in the uppermost mantle. It is an important mineral component in pyrolite model,and is believed to be one of the most abunda...

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A note on Transition Kernels for the Most UnfavourableMixed Strategies of the Market

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Journal of the Operations Research Society of China 2024年第1期12卷 35-50页

作者： sergey n.Smirnov Faculty of Computational Mathematics and Cybernetics Lomonosov Moscow State UniversityMoscowRussian Federation 119991

We consider a deterministic model of market evolution with trading constraints andapply a game-theoretic approach to the superhedging *** obtain sufﬁcientconditions for the game equilibrium and prove under these conditions the existenceof a Borel-measurable transition kernel describing dependence on price prehistory ofthe most unfavourable mixed strategy of the market.

关键词： Superhedging Guaranteed deterministic approach Optimal mixedstrategies of the market Borel-measurable transition kernel Game equilibrium

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Structural Stability of the Financial Market Model: Continuity of Superhedging Price and Model Approximation

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Journal of the Operations Research Society of China 2024年第1期12卷 215-241页

作者： sergey n.Smirnov Faculty of Computational Mathematics and Cybernetics Lomonosov Moscow State UniversityMoscow119991Russian Federation

The present paper continues the topic of our recent paper in the same journal,aiming to show the role of structural stability in financial *** the context of financial market modeling,structural stability means that a specific“no-arbitrage”property is unaffected by small(with respect to the Pompeiu–Hausdorff metric)perturbations of the model’s *** formulate,based on our economic interpretation,a new requirement concerning“no arbitrage”properties,which we call the“uncertainty principle”.This principle in the case of no-trading constraints is equivalent to structural *** demonstrate that structural stability is essential for a correct model approximation(which is used in our numerical method for superhedging price computation).We also show that structural stability is important for the continuity of superhedging prices and discuss the sufficient conditions for this continuity.

关键词： Uncertainty Structural stability no arbitrage Continuity of superhedging price Compact-valued multifunction Financial market model approximation Trading constraints

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水镁石在高温高下的相结构和稳定性

水镁石在高温高下的相结构和稳定性

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中国矿物岩石地球化学学会第17届学术年会

作者：李新阳孙宁宇段云飞张东舟 sergey n.tkachev 毛竹中国科学技术大学地球和空间科学学院美国阿贡国家实验室

近些年来发现的来自于地幔的金刚石包裹体中的含水林伍德石以及冰-Ⅶ充分说明了地球内部至少是局部含水的(Pearson et al.,2014;Tschauner et al.,2018)。研究含水矿物在高温高压下的稳定性有助于理解水在地球内部的运移。作为MgO-SiO-H... 详细信息

近些年来发现的来自于地幔的金刚石包裹体中的含水林伍德石以及冰-Ⅶ充分说明了地球内部至少是局部含水的(Pearson et al.,2014;Tschauner et al.,2018)。研究含水矿物在高温高压下的稳定性有助于理解水在地球内部的运移。作为MgO-SiO-HO(MSH)体系中

关键词：含水矿物水镁石相结构稳定性

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Design of Resilient Sensor networks Balancing Resilience and Efficiency

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International Journal of Disaster Risk Science 2024年第1期15卷 107-115页

作者： sergey n.Vecherin Kiril D.Ratmanski Luke Hogewood Igor Linkov Cold Regions Research and Engineering Laboratory Engineering Research and Development CenterHanoverNH 03755USA Environmental Laboratory Engineering Research and Development CenterVicksburgMS 39180USA

In recent years,the notion of resilience has been developed and applied in many technical areas,becoming exceptionally pertinent to disaster risk *** a disaster situation,accurate sensing information is the key to efficient recovery *** general,resilience aims to minimize the impact of disruptions to systems through the fast recovery of critical functionality,but resilient design may require redundancy and could increase *** this article,we describe a method based on binary linear programming for sensor network design balancing efficiency with *** application of the developed framework is demonstrated for the case of interior building surveillance utilizing infrared sensors in both twoand three-dimensional *** method provides optimal sensor placement,taking into account critical functionality and a desired level of resilience and considering sensor type and *** problem formulation,resilience requirements,and application of the optimization algorithm are described in *** of sensor locations with and without resilience requirements shows that resilient configuration requires redundancy in number of sensors and their intelligent *** tasks are successfully solved by the described method,which can be applied to strengthen the resilience of sensor networks by *** proposed methodology is suitable for large-scale optimization problems with many sensors and extensive coverage areas.

关键词： Binary linear programming Optimal sensor placement Redundant networks Resilience and efciency Resilient sensor networks

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Hypoxia-inducible factor-1αin myocardial infarction

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World Journal of Cardiology 2024年第4期16卷 181-185页

作者： IvanaŠkrlec sergey n Kolomeichuk Faculty of Dental Medicine and Health Josip Juraj Strossmayer University of OsijekOsijek 31000Croatia Institute of Biology Karelia Research Center of Russian Academy of SciencesPetrozavodsk 185910Russia Laboratory for Genomics Proteomicsand MetabolomicsResearch Institute of Biomedicine and Biomedical TechnologiesTyumen State Medical UniversityTyumen 625023Russia

Hypoxia-inducible factor 1(HIF1)has a crucial function in the regulation of oxygen levels in mammalian cells,especially under hypoxic *** importance in cardiovascular diseases,particularly in cardiac ischemia,is because of its ability to alleviate cardiac *** oxygen-responsive subunit,HIF1α,plays a crucial role in this process,as it has been shown to have cardioprotective effects in myocardial infarction through regulating the expression of genes affecting cellular survival,angiogenesis,and ***,HIF1αexpression induced reperfusion in the ischemic skeletal muscle,and hypoxic skin wounds in diabetic animal models showed reduced HIF1α*** expression of HIF1αhas been shown to reduce apoptosis and oxidative stress in cardiomyocytes during acute myocardial *** variations in HIF1αhave also been found to correlate with altered responses to ischemic cardiovascular *** addition,a link has been established between the circadian rhythm and hypoxic molecular signaling pathways,with HIF1αfunctioning as an oxygen sensor and circadian genes such as period circadian regulator 2 responding to changes in *** editorial analyzes the relationship between HIF1αand the circadian rhythm and highlights its significance in myocardial adaptation to *** the changes in molecular signaling pathways associated with diseases,specifically cardiovascular diseases,provides the opportunity for innovative therapeutic interventions,especially in low-oxygen environments such as myocardial infarction.

关键词： Cardiovascular pathologies Circadian genes Hypoxia-inducible factor 1 Hypoxia Gene-gene interaction

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Reactivation of hepatitis B virus infection – an important aspect of multifaceted problem

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World Journal of Gastroenterology 2024年第26期30卷 3193-3197页

作者： sergey Morozov sergey Batskikh Department of Gastroenterology Hepatology and NutritionFederal Research Center of NutritionBiotechnology and Food SafetyMoscow 115446Russia Department of Hepatology Moscow Clinical Scientific Center N.A.A.S.LoginovMoscow 111123Russia

In this editorial we comment on the article published in the recent issue of the W orld Journal of *** focus specifically on the problem of occult hepatitis B virus(HBV)infection,that is a result of previous hepatitis B(PHB)and a source for reactivation of *** prevalence of PHB is underestimated due to the lack of population testing ***,this condition not only com-plicate anticancer treatment,but may be responsible for the development of other diseases,like cancer or autoimmune *** we unveil possible mecha-nisms responsible for realization of these processes and suggest practical approa-ches for diagnosis and treatment.

关键词： Occult hepatitis B virus infection Hepatitis B virus reactivation Previous hepatitis B Cancer Autoimmune disorders

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超级含水相B单晶在高温高压下的弹性常数

超级含水相B单晶在高温高压下的弹性常数

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第十八届中国高压科学学术会议

作者：李新阳毛竹孙宁宇廖一帆翟双猛王毅倪怀伟王景赟 sergey n.tkachev Jung-Fu Lin 中国科学技术大学地球与空间科学学院中国科学院地球化学研究所芝加哥大学先进光源辐射中心德克萨斯大学奥斯汀分校地球科学系

水广泛分布在地球表面。通过俯冲板片下沉,地表的水可由含水矿物作为载体被带入到地球内部。2014年,加拿大Pearson在nature上撰文指出,在巴西Rio Aripuana河东部发现的金刚石包裹体中,发现了含水 wt.%的林伍德石,为地幔含水提供了证据...

水广泛分布在地球表面。通过俯冲板片下沉,地表的水可由含水矿物作为载体被带入到地球内部。2014年,加拿大Pearson在nature上撰文指出,在巴西Rio Aripuana河东部发现的金刚石包裹体中,发现了含水 wt.%的林伍德石,为地幔含水提供了证据。在过去10年,高温高压实验发现并合成了大量高密度含水镁硅酸盐(DHMS)。这些高密度含水镁硅酸盐含水量高达10%以上,可稳定存在于俯冲板片相对较低

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Early selective enteral feeding in treatment of acute pancreatitis: A case report

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World Journal of Clinical Cases 2024年第3期12卷 637-642页

作者： Aleksei A Kashintsev sergey V Anisimov Anastasya nadeeva Vitali Proutski sergey V Anisimov Anastasya NadeevaVitali ProutskiPANDICA LTDLondon WC1N 3ESUnited Kingdom

BACKGROUnD Early initiation of enteral feeding is recognized to play a crucial role in improving the outcomes of treatment of acute ***,the method of adminis-tration of enteral nutrition remains *** present the experience of treating a patient with moderate-severe acute pancreatitis,at high risk of progressing to a severe or fatal condition,using a novel method of selective feeding with duodenal *** SUMMARY A 27-year-old female patient presented to the emergency unit of the hospital with a typical manifestation of acute *** a conventional treatment,the patient’s condition deteriorated by day 2 of *** an endoscopic approach,a novel catheter PandiCathffwas placed to the duodenum of the patient,isolating its segment between the duodenal bulb and the ligament of *** the isolated area created,a negative pressure was applied,followed by introduction of early selective enteral *** patient’s condition subsequently improved in a rapid manner,and no complications often associated with moderate-to-severe acute pancreatitis *** Within 48 h of starting treatment with the novel method,it can prevent the development of multiple organ failure and,when combined with minimally invasive drainage methods,help prevent infection.

关键词： Acute pancreatitis Enteral feeding Infectious complications Systemic inflammatory response syndrome MODS

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