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Geochemical signal of seasonality in annually laminated organic- carbonate sediments in Shira lake(Khakasia)

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Acta Geologica Sinica(English Edition) 2014年第S1期88卷 12-13页

作者： Ivan KALUGIN Andrey DARIN denis rogozin Gennady TRET'YAKOV Sobolev Institute of Geology and Mineralogy Siberian Branch Russian Academy of Sciences Institute of Biophysics Siberian Branch Russian Academy of Sciences

1 Introduction The most valuable for the task of climate reconstruction are the time series with an annual resolution,which allows to reveal natural periodicity and pass to the search for mechanisms of regional and global climatic *** sediments of lakes are one of the best climate archives in addition to tree ring series,ice cores etc.

关键词： saline lake Shira seasonal sedimentation physicochemical modeling carbonates Ca/Sr ratio

Hydrogen production from methane and carbon dioxide mixture using all-solid-state electrochemical cell based on a proton-conducting membrane and redox-robust composite electrodes

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Journal of Energy Chemistry 2022年第6期31卷 576-584,I0016页

作者： denis Osinkin Evgeniy Tropin Laboratory of Solid Oxide Fuel Cells Institute of High-Temperature ElectrochemistryYekaterinburg 620137Russian Federation School of Economics and Management Department of Environmental EconomicsUral Federal UniversityYekaterinburg 620002Russian Federation Laboratory of Solid State Chemistry Institute of Solid State Chemistry and MechanochemistryNovosibirsk 630128Russian Federation

In recent years, interest in hydrogen as a fuel has sharply increased in the field of alternative and green energy due to its high energy capability and zero-emission behaviour. As a result, research in the development of new highly efficient methods for producing high-purity hydrogen is relevant. This paper presents, for the first time, the test results of an electrochemical cell with a proton-conducting La_(0.9)Sr_(0.1)ScO_(3-δ) electrolyte and symmetrical Sr_(1.95)Fe_(1.4)Ni_(0.1)Mo_(0.5)O_(6-δ)+ La_(0.9)Sr_(0.1)Sc_(0.9)Co_(0.1)O_(3-δ) electrodes as a hybrid setup for electricity generation in proton ceramic fuel cell mode, for hydrogen separation from H_(2)+ Ar mixture and the production of high-purity hydrogen from methane with simultaneous CO_(2) *** was found that this electrochemical cell generates high flow rates of hydrogen during its separation through a proton-conducting membrane from H_(2)+ Ar mixture, about 500 cm^(3)h^(-1)cm^(-2)at a current density of 0.6 A cm^(-2)as well as about 370 cm^(3) h^(-1)cm^(-2)at a current density of 0.5 A cm^(-2) from CH_(4)+ CO_(2) mixture at 800 ℃ which shows that these cells are promising for hydrogen production.

关键词： Protonic ceramic fuel cell Hydrogen production Symmetrical electrodes Sr_(2)Fe_(1.5)Mo_(0.5)O_(6–δ) CO_(2)utilization

DGPS/INS Data Fusion for Land Navigation

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Journal of Donghua University(English Edition) 2004年第3期21卷 88-93页

作者： denis Berdjag denis Pomorski L.A.G.I.S. UMR 8021 B timent P2 Cité ScientifiqueUniversité des Sciences et Technologies de Lille 59655 Villeneuve d' Ascq cedex FranceL.A.G.I.S. UMR 8021 B timent P2 Cité ScientifiqueUniversité des Sciences et Technologies de Lille 59655 Villeneuve d' Ascq cedex France

The interest for land navigation has increased for the recent years. With the advent of the Global Position System (GPS) we have now the ability to determine the absolute position anywhere on the globe. The problem is that the GPS systems work well only in open environments with no overhead obstructions and they are subject to large unavoidable errors when the reception from some of the satellites are blocked. This occurs frequently in urban environments, forests and tunnels. GPS systems require at least four “visible” satellites to maintain a good position fix. In many situations in which higher level of accuracy is required, the navigation cannot be achieved by GPS alone. This paper discusses the design of a reliable multisensor fusion algorithm using GPS and Inertial Navigation System in order to decrease the implementation cost of such systems on land vehicles. The major contribution of this paper is in the definition of the possible developments and research axes in land navigation.

关键词： Data fusion inertial navigation system (INS) GPS system Kalman filter informational filter

Preliminary study of mollusk fossils in the Qinan Miocene loess-soil sequence in western Chinese Loess Plateau

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Science China Earth Sciences 2006年第7期49卷 724-730页

作者： denis-Didier Rousseau Université Montpellier II Institut des Sciences de l’Evolution (UMR CNRS 5554) Case 61 Place E. Bataillon 34095 Mont-pellier Cedex 05 France Lamont-Doherty Earth Observatory of Columbia University Palisades New York 10964 USA

The first near continuous mollusk fossil record from the Qinan Miocene loess-soil se-quence is presented. Results show that mollusk species are abundant in the QA-I section between 22 and 6.2 Ma, and both loess layers and soil layers yield mollusk fossil individuals. All mollusk species are terrestrial and well preserved in the section. Most species are identical to those identified in the Quaternary loess-soil sequence of the Loess Plateau. The thermo-humidiphilous group generally is distributed in soil layers, whereas cold-aridiphilous group can be observed in loess layers. From the Miocene to Quaternary, the occurrence and divergence of new species of Metodontia and Cathaica correspond to the crucial periods of regional and global environmental changes, indicating that mol-lusk species are sensitive to environmental variations. Preliminary study on the QA-I mollusk record indicates that the Qinan Miocene loess-soil sequence may have a similar sedimentary environment to the Quaternary loess-soil sequence of the Loess Plateau.

关键词： mollusk fossils, Miocene loess, Loess Plateau, mollusk evolution, sedimentary environment.

Ethnopharmacological Potentials of Warburgia ugandensis on Antimicrobial Activities

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Chinese Journal of Integrative Medicine 2021年第8期27卷 633-640页

作者： denis Okello Youngmin Kang Korean Convergence Medicine Major University of Science and TechnologyDaejeonRepublic of Korea Gombe Secondary School P.O.Box 192Butambala/MpigiUganda Herbal Medicine Research Division Korea Institute of Oriental MedicineDaejeon34054Republic of Korea

Warburgia ugandensis(***)is known by various names,including the East African greenheart,pepper bark tree,and Ugandan greenheart,and has a rich history of extensive use in the treatment of a host of human diseases in many African *** review is based on the botany and ethnopharmacological potentials of *** for the treatment of pneumonia,asthma,malaria,candidiasis,skin infections,human immunodeficiency virus opportunistic infections,diarrhea,and measles given the common use in the management of these *** from *** have strong antimicrobial activities against a broad spectrum of pathogens mainly because of the presence of abundant terpenoids,drimane,and coloratane type sesquditerpenoids amongst which are ugandensial,warburganal,mukaadial,and other secondary metabolites,such as tannins,flavonoids,saponins,steroids,and *** group of compounds gives the plant a high therapeutic *** on the review,there is a need for identification and isolation of the highly therapeutic phytochemical constituents and a drive for more preclinical and clinical trials to validate the safety and efficacy of the *** gives basis for the potential development of new therapeutic drugs from the plant.

关键词： Ethnopharmacological potential Warburgia ugandensis greenheart pharmacological activity review

Edge and lithium concentration effects on intercalation kinetics for graphite anodes

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Journal of Energy Chemistry 2024年第3期90卷 337-347,I0009页

作者： Keming Zhu denis Kramer Chao Peng School of Mechanical and Precision Instrument Engineering Xi'an University of TechnologyXi'an 710048ShanxiChina Faculty of Mechanical Engineering Helmut-Schmidt UniversityHamburg 22043Germany School of Engineering University of SouthamptonSouthampton SO171BJUK Multiscale Crystal Materials Research Center Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055GuangdongChina

Graphite interfaces are an important part of the anode in lithium-ion batteries(LIBs),significantly influencing Li intercalation *** anodes adopt different stacking sequences depending on the concentration of the intercalated Li *** this work,we performed first-principles calculations to comprehensively address the energetics and dynamics of Li intercalation and Li vacancy diffusion near the no n-basal edges of graphite,namely the armchair and zigzag-edges,at high Li *** find that surface effects persist in stage-Ⅱ that bind Li strongly at the edge ***,the pronounced effect previously identified at the zigzag edge of pristine graphite is reduced in LiC_(12),penetrating only to the subsurface site,and eventually disappearing in LiC_(6).Consequently,the distinctive surface state at the zigzag edge significantly impacts and restrains the charging rate at the initial lithiation of graphite anodes,whilst diminishes with an increasing degree of *** diffusion time for Li hopping to the bulk site from either the zigzag edge or the armchair edge in LiC_(6) was observed during high state of charge due to charge *** controlling Li occupation and diffusion kinetics at this stage is also crucial for enhancing the charge rate.

关键词： Graphite anode Edge Interface Lithium-ion batteries Density functional theory

Action observation as a tool for neurorehabilitation to moderate motor deficits and aphasia following stroke

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Neural Regeneration Research 2012年第26期7卷 2063-2074页

作者： denis Ertelt Ferdinand Binkofski Center for Clinical Trials University of Luebeck University Hospital Schleswig-Holstein-Campus Luebeck Cognitive Neurology Department of NeurologyRWTH Aachen University Hospital

The mirror neuron system consists of a set of brain areas capable of matching action observation with action execution. One core feature of the mirror neuron system is the activation of motor areas by action observation alone. This unique capacity of the mirror neuron system to match action perception and action execution stimulated the idea that mirror neuron system plays a crucial role in the understanding of the content of observed actions and may participate in procedural learning. These features bear a high potential for neurorehabilitation of motor deficits and of aphasia following stroke. Since the first articles exploring this principle were published, a growing number of follow-up studies have been conducted in the last decade. Though, the combination of action observation with practice of the observed actions seems to constitute the most powerful approach. In the present review, we present the existing studies analyzing the effects of this neurorehabJlitative approach in clinical settings especially in the rehabilitation of stroke associated motor deficits and give a perspective on the ongoing trials by our research group. The data obtained up to date showed significant positive effect of action observation on recovery of motor functions of the upper limbs even in the chronic state after stroke, indicating that our approach might become a new standardized add-on feature of modern neurorehabilitative treatment schemes.

关键词： mirror neuron system motor system procedural learning stroke neurorehabilitation aphasia paresis motor deficits aphasic deficits stroke

Macro-or microencapsulation of pig islets to cure type 1 diabetes

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World Journal of Gastroenterology 2012年第47期18卷 6885-6893页

作者： denis Dufrane Pierre Gianello Department of Health Sciences Institute for Experimental and ClinicalExperimental Surgery and TransplantationCatholic University of LouvainB-1200 BrusselsBelgium

Although allogeneic islet transplantation can successfully cure type 1 diabetes,it has limited *** example,organs are in short supply;several human pancreas donors are often needed to treat one diabetic recipient;the intrahepatic site may not be the most appropriate site for islet implantation;and immunosuppressive regimens,which are associated with side effects,are often required to prolong survival of the islet *** alternative source of insulinproducing cells would therefore be of major *** represent a possible alternative source of beta *** of pig islets may appear difficult because of the immunologic species barrier,but pig islets have been shown to function in primates for at least 6 mo with clinically incompatible ***,a bioartificial pancreas made of encapsulated pig islets may resolve issues associated with islet *** several groups have shown that encapsulated pig islets are functional in small-animal models,less is known about the use of bioartificial pancreases in large-animal *** this review,we summarize current knowledge of encapsulated pig islets,to determine obstacles to implantation in humans and possible solutions to overcome these obstacles.

关键词： Cell transplantation Diabetes mellitus type 1 Islets of Langerhans Porcine Xenografts

Statistical Estimation of the Shannon Entropy

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Acta Mathematica Sinica,English Series 2019年第1期35卷 17-46页

作者： Alexander BULINSKI denis DIMITROV Steklov Mathematical Institute of Russian Academy of Sciences and Department of Mathematics and Mechanics Lomonosov Moscow State UniversityMoscow 119234Russia

The behavior of the Kozachenko–Leonenko estimates for the(differential) Shannon entropy is studied when the number of i.i.d. vector-valued observations tends to infinity. The asymptotic unbiasedness and L^2-consistency of the estimates are established. The conditions employed involve the analogues of the Hardy–Littlewood maximal function. It is shown that the results are valid in particular for the entropy estimation of any nondegenerate Gaussian vector.

关键词： Shannon differential entropy Kozachenko-Leonenko estimates Hardy-Littlewood maxi-mal function analogues asymptotic unbiasedness and L^2-consistency Gaussian vectors