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Genetic analysis for geographic isolation comparison of brown bears living in the periphery of the Western Carpathians Mountains with bears living in other areas

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Open Journal of Genetics 2013年第3期3卷 174-182页

作者： Jan Graban Jana Kiskova Pavol Pepich robin rigg Institute of the High Mountain Biology University of Zilina Tatranska JavorinaTatranska JavorinaSlovak Republic Institute of Foreign Languages University of ZilinaZilinaSlovak Republic Slovak Wildlife Society Liptovsky HradokSlovak Republic

Populations of the European brown bear (Ursus arctos L.) differ substantially in size, degree of geographic isolation and level of genetic diversity. Present patterns result from phylogeographic processes and profound human intervention. We assessed the genetic variability of a subpopulation of brown bears near the periphery of their range in the Western Carpathian Mountains and compared their genetic properties with those of bears in the core of the same population and elsewhere. Samples were collected non-invasively in 2007-2008 and2010 in Strázovské Vrchy Protected Landscape Area (PLA) in Slovakia (included in the NATURA 2000 networking programme). Seven polymorphic microsatellite loci (UaMU26, UaMU64, G10B, G1D, G10L, UaMU50 and UaMU51) were amplified using a nested PCR in order to assess the following parameters: variability, allelic combinations, heterozygosity, number of alleles and inbreeding coefficient. Sufficient brown bear DNA for analysis was obtained from 57 out of 140 samples (41%), among which 45 different genotypes were identified. Loci had a mean of 2.71 ± 0.76 alleles. Average observed heterozygosity was 0.59. The inbreeding coefficient was negative for all but one of the analysed loci (2007-2008). In the year 2010 was negative three of seven loci. These results imply that gene flow with other parts of the population has been maintained in the reduced level and the isolation level of bears in the study area was not so low. Nevertheless, the genetic variability of bears in Strázovské Vrchy PLA was lower than that reported from other localities in the Carpathian Mountains. The results are discussed in the context of behavioural ecology and conservation genetics.

关键词： Carpathian Mountains European Brown Bear Ursus arctos L. Genetic Diversity Microsatellite Markers Non-Invasive Sampling

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Optimal control of a hybrid microgrid for hydrogenbased heat supply using deep reinforcement learning

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Clean Energy 2023年第5期7卷 940-951页

作者： robin Heckmann Faculty of Computer Science University of Library Studies and Information Technologies119Tsarigradsko shosse Blvd1784SofiaBulgaria

Green hydrogen is considered one of the key technologies of the energy transition,as it can be used to store surpluses from renewable energies in times of high solar radiation or wind speed for use in dark *** paper examines the decarbonization potential of hydrogen for the heating ***,99%of hydrogen is produced from fossil fuels,because hydrogen derived from renew-able energy sources remains prohibitively expensive compared with its conventional ***,due to the expansion of renewable energy sources and the current energy crisis of conventional energy sources,hydrogen from renewable energy sources is becoming more and more *** optimize the efficiency of green hydrogen production and make it more price-competitive,the author simulates a hydrogen production plant consisting of a photovoltaic plant,a power grid,hydrogen storage,an electro-lyser,a natural gas purchase option,a district heating plant and *** the deep deterministic policy gradient algorithm from deep reinforcement learning,the plant is designed to optimize itself by simulating different production scenarios and deriving *** connected district heating plant is used to map how hydrogen can be optimally used for heat supply.A demonstrable outcome of this paper is that the utilization of deep deterministic policy gradient,over the course of a full year,can result in a com-petitive production of hydrogen derived from renewable or stored energy sources for the heating industry as a natural gas substitute.

关键词： hydrogen renewable energy hybrid microgrid deep reinforcement learning deep deterministic policy gradient

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THE VACUUM IN NONISENTROPIC GAS DYNAMICS

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Acta Mathematica Scientia 2012年第1期32卷 339-351页

作者： Geng Chen robin Young Department of Mathematics Pennsylvania State University University Park PA 16802 USA Department of Mathematics University of Massachusetts Amherst MA 01003 USA

We investigate the vacuum in nonisentropic gas dynamics in one space vari- able, with the most general equation of states allowed by thermodynamics. We recall physical constraints on the equations of state and give explicit and easily checkable conditions under which vacuums occur in the solution of the Riemann problem. We then present a class of models for which the Riemann problem admits unique global solutions without vacuums.

关键词： nonisentropic gas dynamics conservation laws vacuum large data Riemann problem

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LINEAR WAVES THAT EXPRESS THE SIMPLEST POSSIBLE PERIODIC STRUCTURE OF THE COMPRESSIBLE EULER EQUATIONS

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Acta Mathematica Scientia 2009年第6期29卷 1749-1766页

作者： Blake Temple robin Young Department of Mathematics University of California Davis CA 95616 USA Department of Mathematics and Statistics University of Massachusetts Amherst MA 01003 USA

In this paper we show how the simplest wave structure that balances compression and rarefaction in the nonlinear compressible Euler equations can be represented in a solution of the linearized compressible Euler equations. Such waves are exact solutions of the equations obtained by linearizing the compressible Euler equations about the periodic extension of two constant states separated by entropy jumps. Conditions on the states and the periods are derived which allow for the existence of solutions in the Fourier 1-mode. In [3, 4, 5] it is shown that these are the simplest linearized waves such that, for almost every period, they are isolated in the kernel of the linearized operator that imposes periodicity, and such that they perturb to nearby nonlinear solutions of the compressible Euler equations that balance compression and rarefaction along characteristics in the formal sense described in [3]. Their fundamental nature thus makes them of interest in their own right.

关键词： compressible Euler periodic solutions conservation laws

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Mapping urban building stocks for vulnerability assessment preliminary results

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International Journal of Digital Earth 2011年第S01期4卷 117-130页

作者： Keiko Saito robin Spence Department of Architecture University of CambridgeCambridgeUK Cambridge Architectural Research Ltd CambridgeUK Willis Research Fellow Willis Research Network

This paper discusses a methodology to collect building inventory data by combining image processing techniques,field work or tools such as Google Street View and applying statistical *** the methodology outlined in Marinescu(2002),a family of Gabor filters are first constructed,which are then applied to an optical high-resolution *** output from the processed image is segmented using Self-Organising *** paper examines the relationship between the segmented areas in the image and the building type distribution within each segmented area,by deriving the distribution from field *** relationship between the average number of buildings in these cells against the number of grid cells allocated to each segmentation cluster is also ***,using these results,the overall building inventory distribution for the whole of the case study site of Pylos is presented.

关键词： building inventory data collection remote sensing high-resolution optical satellite images Gabor filters Self-Organising Maps field data

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Continuous flow synthesis of plasmonic gold patches and nearly-complete nanoshells on polystyrene core particles

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Particuology 2023年第4期75卷 137-150页

作者： Thomas Meincke robin N.Klupp Taylor Institute of Particle Technology Friedrich-Alexander University Erlangen-NürnbergCauerstrasse 491058ErlangenGermany Collaborative Research Center 1411-Design of Particulate Products Friedrich-Alexander University Erlangen-Nürnberg Cauerstrasse 391058 Erlangen Germany

We describe the development of a T-mixer based continuous flow process for the coating of 86-500 nm diameter spherical polystyrene particles with thin gold patches by heterogeneous nucleation and *** establishing a suitable flow rate for good mixing and sufficiently uniform product morphology we systematically investigate the main reaction *** reveals a considerable tunability of the patch morphology and,by virtue of the localized surface plasmon resonance of gold,the optical properties of the product *** order to further widen the range of nanostructures accessible by our process,a second T-mixer was *** introduced new gold precursor,leading to further growth of the patches that were formed after the first *** this approach,nearly-complete gold nanoshells could be produced in high yield on both small and large core particles,without the unwanted production of free-standing gold *** to the pronounced optical properties of nearly-complete gold nanoshells on small core particles,we could estimate from electrodynamic sim-ulations the equivalent shell thickness to be as low as 8.6 *** is significantly thinner than can be routinely achieved using the standard seeded growth approach to synthesise gold *** results are therefore highly promising for the gram-scale synthesis of plasmon resonant nanostructures with designed optical properties.

关键词： Continuous flow Core-shell particles Patchy particles Nucleation Diffusion limited growth

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N-heterocyclic carbene-catalyzed arene formation reactions

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Science China Chemistry 2022年第2期65卷 210-223页

作者： Tingting Li Zhichao Jin Yonggui robin Chi State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural BioengineeringMinistry of EducationGuizhou UniversityGuiyang 550025China Division of Chemistry&Biological Chemistry School of Physical&Mathematical SciencesNanyang Technological UniversitySingapore 637371Singapore

N-heterocyclic carbene-catalyzed reactions for the formation of aromatic compounds are *** reactions are subdivided into 4 types based on their activation modes.A brief summary on the achievements and the challenges remaining in Nheterocyclic carbene(NHC)-catalyzed arene construction processes is provided at the end of this *** outlook into the future research direction within this field is also given based on our own opinion and knowledge on the trends of the development of NHC organocatalysis.

关键词： N-heterocyclic carbene arene construction cycloaddition organocatalysis

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Gym-ANM: Reinforcement learning environments for active network management tasks in electricity distribution systems

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Energy and AI 2021年第3期5卷 171-193页

作者： robin Henry Damien Ernst School of Engineering Sanderson BuildingThe University of EdinburghEdinburgh EH93FBUK Department of Electrical Engineering and Computer Science Montefiore InstituteUniversity of LiegeLiege B-4000Belgium

Active network management(ANM)of electricity distribution networks include many complex stochastic sequential optimization *** problems need to be solved for integrating renewable energies and distributed storage into future electrical *** this work,we introduce Gym-ANM,a framework for designing reinforcement learning(RL)environments that model ANM tasks in electricity distribution *** environments provide new playgrounds for RL research in the management of electricity networks that do not require an extensive knowledge of the underlying dynamics of such *** with this work,we are releasing an implementation of an introductory toy-environment,ANM6-Easy,designed to emphasize common challenges in *** also show that state-of-the-art RL algorithms can already achieve good performance on ANM6-Easy when compared against a model predictive control(MPC)***,we provide guidelines to create new Gym-ANM environments differing in terms of(a)the distribution network topology and param-eters,(b)the observation space,(c)the modeling of the stochastic processes present in the system,and(d)a set of hyperparameters influencing the reward ***-ANM can be downloaded at https://***/robinhenr y/gym-anm.

关键词： Gym-ANM Reinforcement learning Active network management Distribution networks Renewable energy

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Status epilepticus as a complication after COVID-19 mRNA-1273 vaccine:A case report

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World Journal of Clinical Cases 2021年第24期9卷 7218-7223页

作者： robin Sin Denisa Struncova Department of Infectious Diseases and Travel Medicine Faculty of Medicine in PilsenCharles UniversityUniversity Hospital PilsenPilsen 30599Czech Republic Medical Department Emergency Medical Service of the Pilsen RegionPilsen 30100Czech Republic Department of Anaesthesiology and Intensive Care Medicine University Hospital PilsenPilsen 30460Czech Republic Faculty of Medicine Masaryk UniversityBrno 62500Czech Republic

BACKGROUND We present a rare case of status epilepticus in a 56-year-old man which arose as a complication after vaccination with the coronavirus disease 2019(COVID-19)mRNA-1273 *** patient's history included well-compensated secondary *** root cause of the situation was a fever which had developed as a side effect of the *** SUMMARY A 56-year-old man received the first dose of mRNA-1273 vaccine against the severe acute respiratory *** vaccine was administered intramuscularly(100 mg,0.5 mL).The next morning the man was found to be suffering from fever and headaches while at the same time experiencing general *** lost consciousness suddenly and experienced generalized clonic seizures which turned into status *** the Emergency Medical Service arrived the patient was unconscious with spontaneous breathing and generalized clonic *** was necessary to administer diazepam *** was also necessary to administer high doses of levetiracetam and temporary *** status epilepticus was brought under control approximately 90 min after the patient’s transport to the Emergency Department.A follow-up electroencephalogram no longer revealed abnormal indications of epileptic *** patient was temporarily hospitalized in the Intensive Care Unit and after seven days care was discharged without any further apparent *** There is currently no specific treatment against ***,the benefits of COVID-19 vaccine protection outweigh the risks.

关键词： SARS-CoV-2 COVID-19 mRNA vaccine Complication of vaccination Status epilepticus Case report

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New Breakdown Electric Field Calculation for SF6 High Voltage Circuit Breaker Applications

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Plasma Science and Technology 2007年第6期9卷 690-694页

作者： Ph.robin-JOUAN M.YOUSFI AREVA T & D High Voltage Switchgear Research Centre 130 rue L.BLUM 69611 VilleurbanneFrance University of Toulouse LAPLACE-UMR 5213 CNRSUPS118 Route de Narbonne31062 Toulouse Cedex 9France

The critical electric fields of hot SF6 are calculated including both electron and ion kinetics in wide ranges of temperature and pressure, namely from 300 K up to 4000 K and 2 atmospheres up to 32 atmospheres respectively. Based on solving a multi-term electron Boltz- mann equation the calculations use improved electron-gas collision cross sections for twelve SF6 dissociation products with a particular emphasis on the electron-vibrating molecule interactions. The ion kinetics is also considered and its role on the critical field becomes non negligible as the temperature is above 2000 K. These critical fields are then used in hydrodynamics simulations which correctly predict the circuit breaker behaviours observed in the case of breaking tests.

关键词： breakdown electric field hot dissociated SF6 high voltage gas-circuit-breaker

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