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Tri-axial accelerometry shows differences in energy expenditure and parental effort throughout the breeding season in long-lived raptors

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Current Zoology 2022年第1期68卷 57-67页

作者： Pascual LOPEZ-LOPEZ Arturo MPERONA olga egea-casas Jon MORANT Vicente URIOS Movement Ecology Laboratory Cavanilles Institute of Biodiversity and Evolutionary BiologyUniversity of Valencia.C/Catedratico JoseBeltran 2E-46980 PaternaValenciaSpain Department of Ornithology Aranzadi Sciences SocietyDonostia-S.SebastianGuipuzcoa 03690Spain Vertebrates Zoology Research Group University of AlicanteApdo.99Alicante E-03080Spain

Cutting-edge technologies are extremely useful to develop new workflows in studying ecological data,particularly to understand animal behavior and movement trajectories at the individual *** parental care is a well-studied phenomenon,most studies have been focused on direct observational or video recording data,as well as experimental ***,what happens out of our sight still remains *** high-frequency GPS/GSM dataloggers and tri-axial accelerometers we monitored 25 Bonelli’s eagles Aquila fasciata during the breeding season to understand parental activities from a broader *** used recursive data,measured as number of visits and residence time,to reveal nest attendance patterns of biparental care with role specialization between *** data interpreted as the overall dynamic body acceleration,a proxy of energy expenditure,showed strong differences in parental effort throughout the breeding season and between ***,males increased substantially their energetic requirements,due to the increased workload,while females spent most of the time on the ***,during critical phases of the breeding season,a low percentage of suitable hunting spots in eagles’territories led them to increase their ranging behavior in order to find food,with important consequences in energy consumption and mortality *** results highlight the crucial role of males in raptor species exhibiting biparental ***,we exemplify how biologging technologies are an adequate and objective method to study parental care in raptors as well as to get deeper insight into breeding ecology of birds in general.

关键词： biologging GPS movement ecology ODBA space use telemetry

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Nonconservative mechanical systems with nonholonomic constraints

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Science China(Physics,Mechanics & Astronomy) 2012年第8期55卷 1475-1484页

作者： KRUPKOV olga Department of Mathematics Faculty of Science The University of Ostrava 30. dubna 22 701 03 Ostrava Czech Republic Department of Mathematics and Statistics La Trobe University Melbourne Victoria 3086 Australia

A geometric setting for generally nonconservative mechanical systems on fibred manifolds is proposed. Emphasis is put on an explicit formulation of nonholonomic mechanics when an unconstrained Lagrangian system moves in a generally non-potential force field depending on time, positions and velocities, and the constraints are nonholonomic, not necessarily linear in velocities. Equations of motion, and the corresponding Harniltonian equations in intrinsic form are given. Regularity conditions are found and a nonholonomic Legendre transformation is proposed, leading to a canonical form of the nonholonomic Hamiltonian equations for nonconservative systems.

关键词： nonconservative mechanical systems equations of motion Hamiltonian equations nonholonomic constraints Chetaevequations Hamiltonian equations for nonconservative nonholonomic systems

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Paleoclimate Study of Mountain Ecosystems by Multiple Group Biological Analysis

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Journal of Mountain Science 2011年第1期8卷 24-36页

作者： Marina SKRYPNIKOVA olga USPENSKAYA olga KHOKHLOVA Dokuchaev Soil Science Institute of Russian Academy of Agricultural Sciences Pyzhevsky Lane7Moscow109017Russia Vegetable Institute of Russian Academy of Agricultural Sciences h.500v.VereaRamenskii distMoscow region140153Russia Institute of Physical Chemical and Biological Problems in Soil Science of RASUlitsa Institutskaya2PushchinoMoscow region142290Russia

Methodological problems of climatic reconstruction for different periods of Holocene are discussed on the basis of a multiple group biological analysis on peat-sapropel sediments. The possibility of biological analysis is exemplified by the paleoclimatic reconstruction for Carpathian and Altai Mountain ranges. For the ＂Skolevsky Beskidy＂ national park of Carpaty the paleoclimatic scenarios have been drown up aiming at the more precise definition of climatic conditions for the period of mass mountain slope terracing. The stability of terrace systems of various designs in the current climatic conditions has been assessed. It is shown that during periods of humid climate the terraces, whose designs have been focused on drainage, were built. In periods of dry and warm climate the terrace systems capable of accumulating water were built. Both these types of terrace systems are destroyed in nowadays. Only those terrace systems are stable which were adjusted by their builders to contrast variations of precipitation. For Western Altais the paleoclimatic scenario has been done to forecast the safety of the Bronze Age kurgans （burial earth mounds） with permafrost inside the construction. In the Altay region during the Holocene it has revealed two periods of sharp cooling, the peaks of which occurred in the intervals 4500- 4300 and 2500-2300 years pronounced climatic drying ago, and two periods of 4900-4700 and 130-70 years ago. Depletion of the algae composition in the layer corresponding to the last period of drying climate indicates a very sharp change in the parameters of moisture and turning the lake into a dry swamp. Periods of cold weather may have contributed to the formation of special ritual traditions of the Sakan tribes that require the frozen ground to bury the dead. The later climate fluctuations identified have not affected the safety of permafrost in burial mounds constructed in the V-III cc BC.

关键词： Climatic reconstruction Complex group biological analysis of peat-sapropel sediments Paleopedology Soil evolution Holocene

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Deciphering tau-related dementia using human iPSC lines: electrophysiological perspectives of future studies

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Neural Regeneration Research 2022年第12期17卷 2672-2674页

作者： olga Kopach Queen Square Institute of Neurology University College LondonLondonUK

To date,no disease-modifying treatment or cure is available for *** disorder is becoming more common as the global population *** has been over several decades of extensive research focusing on how the pathology develops and progresses causing memory loss,brain damage,and eventually death-it provides the field with a deep understanding of what proteins,peptides,and signaling molecules contribute to neurodegeneration at the molecular,genetic,and cellular *** problem is,however,that there is a wide range of dementia types.A given disease can span heterogeneous clinical syndromes with diverse symptomatology,no matter whether it is“senile dementia”or an early-onset form;moreover,it encompasses the mixed features of many syndromes in later stages of the disease.

关键词： senile pathology eventually

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Searching for the brightest stars in galaxies outside the Local Group

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Research in Astronomy and Astrophysics 2021年第4期21卷 264-270页

作者： Nikolay Tikhonov olga Galazutdinova olga Sholukhova Antoniya Valcheva Petko Nedialkov olga Merkulova Special Astrophysical Observatory Nizhnij ArkhyzKarachai-Cherkessian RepublicRussia 369167 Department of Astronomy Sofia University1504 Sofia15 Tsar Osvoboditel Blvd.SofiaBulgaria Astronomical Institute St.Petersburg State UniversityUniversitetskii pr.28St.Petersburg198504 Russia

This paper introduces a technique for searching for bright massive stars in galaxies beyond the Local *** search for massive stars,we processed the results of stellar photometry from the Hubble Space Telescope(HST)images using the DAOPHOT and DOLPHOT *** results of such searches are demonstrated with examples of the galaxies DDO 68,M94 and NGC *** the galaxy DDO 68,the LBV star changes its brightness,and massive stars in M94 can be identified by excess in the Ha *** the galaxy NGC 1672,we measure the distance for the first time by the TRGB method,which enabled determining the luminosities of the brightest stars,likely hypergiants,in the young star formation *** far,we have performed stellar photometry on HST images of 320 northern sky galaxies located at a distance less than 12 *** allowed us to identify 53 galaxies with probable *** photometric and spectral observations of these galaxies are planned to search for massive stars.

关键词： stars:massive stars:variables:LBV galaxies:individual:M94 DDO 68 NGC 1672

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U-Blacks Mineralization in Sandstone Uranium Deposits

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Journal of Earth Science 2022年第2期33卷 308-316页

作者： olga A.Doynikova Institute of Ore Deposits Geology PetrographyMineralogy and Geochemistry Russian Academy of ScienceMoscow 119017Russia

Ores of infiltration sandstone-hosted uranium deposits in the sedimentary cover are ubiquitous composed of dispersed soot powder mineralization of black,brownish-black *** studies of such loose U-ores by analytical transmission electron microscopy(ATEM)proved their polymineral *** blacks are composed by at least three different U-mineral forms:oxide(uraninite),silicate(coffinite)and phosphate(ningyoite)which are present in various proportions of ore *** high dispersed friable uranium formations are difficult to diagnose by traditional mineralogical methods(optical,XRD,IR and X-ray spectroscopy,etc.)which analyze total sample composition(phases mixture);their results characterize the dominant sample phase,omitting both sharply subordinate and X-ray amorphous *** research results are based on ATEM methods(SAED+EDS),which are optimal for crystallochemical diagnostics in the mineralogical study of such uranium *** article presents the diagnostic characteristics under electron microscope(EM)of uranous minerals from different sandstone deposits with their origin being discussed.

关键词： uranous minerals uraninite coffinite ningyoite biogenic nature U-deposit ore deposit geology

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INITIAL VALUE TECHNIQUES FOR THE HELMHOLTZ AND MAXWELL EQUATIONS

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Journal of Computational Mathematics 2007年第3期25卷 368-373页

作者： Frank Natterer olga Klyubina Department of Mathematics University of MünsterGermany

We study the initial value problem of the Helmholtz equation with spatially variable wave number. We show that it can be stabilized by suppressing the evanescent waves. The stabilized Helmholtz equation can be solved numerically by a marching scheme combined with FFT. The resulting algorithm has complexity n^2 log n on a n x n grid. We demonstrate the efficacy of the method by numerical examples with caustics. For the Maxwell equation the same treatment is possible after reducing it to a second order system. We show how the method can be used for inverse problems arising in acoustic tomography and microwave imaging.

关键词： Stability of elliptic initial value problems Parabolic wave equation Inverseproblems in acoustics and electromagnetics.

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Longitudinal dependence of the forecast accuracy of the ionospheric total electron content in the equatorial zone

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Geodesy and Geodynamics 2024年第5期15卷 528-541页

作者： Artem Kharakhashyan olga Maltseva Institute for Physics Southern Federal University344090Russia

The longitudinal dependence of the behavior of ionospheric parameters has been the subject of a number of works where significant variations are *** also applies to the prediction of the ionospheric total electron content(TEC),which neural network methods have recently been widely ***,the results are mainly presented for a limited set of *** paper examines the longitudinal dependence of the TEC forecast accuracy in the equatorial *** this case,the methods are used that provided the best accuracy on three meridians:European(30°E),Southeastern(110°E)and American(75°W).Results for the stations considered are analyzed as a function of longitude using the Jet Propulsion Laboratory Global Ionosphere Map(JPL GIM)for *** results are for 2 h ahead and 24 h ahead *** was found that in this case,based on the metric values,three groups of architectures can be *** first group included long short-term memory(LSTM),gated recurrent unit(GRU),and temporal convolutional networks(TCN)models as a part of unidirectional deep learning models;the second group is based on the recurrent models from the first group,which were supplemented with a bidirectional algorithm,increasing the TEC forecasting accuracy by 2-3 *** third group,which includes the bidirectional TCN architecture(BiTCN),provided the highest *** this architecture,according to data obtained for 9 equatorial stations,practical independence of the TEC prediction accuracy from longitude was observed under the following metrics(Mean Absolute Error MAE,Root Mean Square Error RMSE,Mean Absolute Percentage Error MAPE):MAE(2 h)is 0.2 TECU approximately;MAE(24 h)is 0.4 TECU approximately;RMSE(2 h)is less than 0.5 TECU except Niue station(RMSE(2 h)is 1 TECU approximately);RMSE(24 h)is in the range of 1.0-1.7 TECU;MAPE(2 h)<1%except Darwin station,MAPE(24 h)<2%.This result was confirmed by data from additional 5 stations that formed latitudinal chains in the

关键词： Ionosphere Total electron content Forecasting BiGRU BiLSTM BiTCN Temporal convolution

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The role of NLRP3 inflammasome for microglial response to peripheral inflammation

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Neural Regeneration Research 2021年第2期16卷 294-295页

作者： olga Garaschuk Institute of Physiology Department of NeurophysiologyEberhard Karls University of TübingenTübingenGermany

Systemic inflammation is often accompanied by adaptive responses mediated by the central nervous system, such as lack of motivation andattention, fatigue, malaise, irritation oreven depression. This symptoms aresummar... 详细信息

关键词： motivation such NLRP3

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Vibrational Suspension of Two Cylinders in a Rotating Liquid-Filled Cavity with a Time-Varying Rotation Rate

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Fluid Dynamics & Materials Processing 2024年第9期20卷 2127-2137页

作者： olga Vlasova Laboratory of Vibrational Hydromechanics Perm State Humanitarian Pedagogical UniversityPermSibirskaya614990Russia

The dynamics of rotating hydrodynamic systems containing phase inclusions are interesting due to the related widespread occurrence in nature and *** influence of external force fields on rotating systems can be used to control the dynamics of inclusions of various *** inclusions is of current interest for space *** low gravity,even a slight vibration effect can lead to the appearance of a force acting on phase inclusions near a solid *** vibrations are applied to multiphase hydrodynamic systems,the oscillating body intensively interacts with the fluid and introduces changes in the related flow *** in the fluid flow lead to the appearance of an averaged *** a result,the body is repelled from the cavity boundary and takes a position at a certain distance from *** vibrationally-induced movement of phase inclusions in liquids can be used to improve various technological processes(for example,when degassing and cleaning liquids from solid inclusions,mixing various components,etc.).This study presents a relevant methodology to study the averaged vibrational force acting on a pair of free cylindrical bodies near the oscillating wall of a *** is paid to the region of moderate and low dimensionless frequencies when the size of the inclusion is consistent with the thickness of the Stokes boundary *** dynamics of these bodies is considered in a horizontal cylindrical cavity with a fluid undergoing modulated *** average lift force of a vibrational nature is measured by the method of quasi-stationary suspension of bodies whose density differs from the density of the liquid in a static centrifugal force *** developed technique makes it possible to determine the dependence of the lift force on vibration parameters and the distance from the oscillating boundary at which solid inclusions are *** is shown that in the region of moderate dimensionless frequencies,the averag

关键词： Solid bodies rotational oscillations viscous fluid lift force

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