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Changes in the adult sex ratio of six duck species breeding populations over two decades

Avian Research 2024年第2期15卷 202-210页

作者： Monika Homolkova Petr Musil Diego Pavon-Jordan Dorota Gajdosova Zuzana Musilova sarka neuzi.ova Jan Zouhar Department of Ecology Faculty of Environmental SciencesCzech University of Life Sciences PragueKamýcka 129CZ-16521Prague–SuchdolCzech Republic Department of Terrestrial Ecology Norwegian Institute for Nature Research(NINA)PO Box 5685 TorgardenTrondheimN-7485Norway Department of Econometrics Faculty of Informatics and StatisticsUniversity of Economicsnam.W.Churchilla 4CZ-13067Prague 3Czech Republic

Despite all efforts,long-term changes in the adult sex ratios of breeding duck populations are still unclear;this uncertainty is especially true for male-bias populations,which are often under the scrutiny of researchers lacking convenient results for the active protection of endangered *** with male-bias populations are usually strongly affected by a decline in population size that leads to a higher extinction *** this study,we examined our long-term data of the abundance of breeding populations in six duck species(Mallard Anas platyrhynchos,Gadwall Mareca strepera,Red-crested Pochard Netta rufina,Common Pochard Aythya ferina,Tufted Duck Aythya fuligula,and Common Goldeneye Bucephala clangula)from fishponds in South Bohemia,Czechia,between 2004 and *** evidence was used to assess long-term changes in the adult sex ratio in these breeding populations and investigate the possible effects of the NAO index(North Atlantic Oscillation index)on them,indicating climate conditions in *** determined a long-term decrease of the proportion of females in the breeding season in two of the six examined species:Common Pochard and Red-crested Pochard,which is driven by the long-term increase in the number of males in contrast to the decreasing or stable number of females likely caused by different migration behaviours between females and *** the case of Common Pochard,in breeding populations,we estimated 60-65%of males in the early 2000s rising to 75-80%in the early ***,we establish no significant effects linked to climate conditions of the previous winter in these species as a crucial cause of the changes of the proportion of females in the breeding population.

关键词： Adult sex ratio Breeding population Population dynamics Red-listed species Waterfowl Winter weather conditions

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蜻蜓点水画龙点睛巧色点缀三种面貌

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钟表 2024年第2期 78-85页

作者： Bryan Lee ova Chang 不详

BVLGARI湖畔花开,如宝石闪耀.蜻蜓点水,似舞步翩跹.表中镜,照见万千,映衬如梦般的花色人生.CARTIER因飞行美梦而诞生Santos致力于形塑方形表壳的对称之美并借此向巴黎铁塔4个边角致敬犹如俯瞰着雄伟壮观的法国地标铁塔之美卡地亚以蓝线...

BVLGARI湖畔花开,如宝石闪耀.蜻蜓点水,似舞步翩跹.表中镜,照见万千,映衬如梦般的花色人生.CARTIER因飞行美梦而诞生Santos致力于形塑方形表壳的对称之美并借此向巴黎铁塔4个边角致敬犹如俯瞰着雄伟壮观的法国地标铁塔之美卡地亚以蓝线石绿玉红碧玉化身罗马数字时标重现铁塔充满张力的交叉铁架

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腕表上的龙腾盛景

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钟表 2024年第2期 62-77页

作者： ova Chang Bryan Lee 不详

2024年青龙年,龙年生肖表精彩纷呈,不仅是中华文化传承的体现,也反映了腕表品牌对中国市场的重视,龙年表则成为今年腕表新品中一道亮丽的风景线。龙,在中华文化中,不仅仅是十二生肖之首,更被赋予了至高无上的尊贵地位。这一神秘生物象... 详细信息

2024年青龙年,龙年生肖表精彩纷呈,不仅是中华文化传承的体现,也反映了腕表品牌对中国市场的重视,龙年表则成为今年腕表新品中一道亮丽的风景线。龙,在中华文化中,不仅仅是十二生肖之首,更被赋予了至高无上的尊贵地位。这一神秘生物象征着权威、尊贵与吉祥之气,深深植根于中华民族的精神世界之中。在漫长的中国历史长河里,龙早已是中华文化不可分割的一部分,其影响力贯穿于各个层面,从纹饰艺术、建筑设计、传统节庆到民间传说、成语俗语,无不体现了龙的独特魅力与深远意义。更有诸多以龙为名的山脉、河流湖泊以及建筑物,展现了龙文化在中国的重要性。

关键词：文化传承建筑设计十二生肖传统节庆中华文化腕表河流湖泊尊贵

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Novel therapeutic strategies and common mechanisms of neurodegenerative diseases

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Neuroprotection 2024年第2期2卷 65-66页

作者： sarka Lehtonen Jukka Jolkkonen A.I.Virtanen Institute for Molecular Sciences University of Eastern Finland Kuopio Finland

Neuroprotection holds particular significance in neurodegenerative diseases characterized by the death of brain *** differences in timeframe,location,pathology,and clinical outcomes,common pathophysiological mechanisms may exist,including oxidative stress and *** far,neuroprotective therapies have yet to demonstrate significant benefits in clinical trials.1 Reasons for past translational failures may involve low experimental study quality,more complex pathophysiology than expected,challenging drug delivery,late intervention,and safety ***,recent advances offer renewed hope and potential breakthroughs that could change the treatment landscape in the *** novel therapeutic strategies will be discussed in this issueofNeuroprotection.

关键词： brain-derived neurotrophicfactor(BDNF) drug repositioning gut microbiota neuroprotection oxidative stress Parkinson's disease stroke

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Extracellular matrix based biomaterials for central nervous system tissue repair: the benefits and drawbacks

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Neural Regeneration Research 2017年第9期12卷 1430-1432页

作者： sarka Kubinova Department of Biomaterials and Biophysical Methods Institute of Experimental Medicine The Czech Academy of Science

Functional repair of injured tissue in the adult central nervous system （CNS） still remains a big challenge for current biomed- ical research and its upcoming clinical translation. The axonal regeneration of the adult CNS is generally low, and it is addi- tionally restricted after injury by the presence of inhibitory mol- ecules, generated by the glial scar.

关键词： ECM the benefits and drawbacks Extracellular matrix based biomaterials for central nervous system tissue repair

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Finite Volume Evolution Galerkin Methods for the Shallow Water Equations with Dry Beds

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Communications in Computational Physics 2011年第7期10卷 371-404页

作者： Andreas Bollermann Sebastian Noelle Maria Lukacova-Medvid’ova IGPM RWTH AachenTemplergraben 5552062 AachenGermany Institut fur Mathematik Universitat MainzStaudingerweg 955099 MainzGermany.

We present a new Finite Volume Evolution Galerkin(FVEG)scheme for the solution of the shallow water equations(SWE)with the bottom topography as a source *** new scheme will be based on the FVEG methods presented in(Noelle and Kraft,***.,221(2007)),but adds the possibility to handle dry *** most important aspect is to preserve the positivity of the water *** present a general approach to ensure this for arbitrary finite volume *** main idea is to limit the outgoing fluxes of a cell whenever they would create negative water ***,this corresponds to the absence of fluxes in the presence of *** is then re-established by splitting gravitational and gravity driven parts of the ***,a new entropy fix is introduced that improves the reproduction of sonic rarefaction waves.

关键词： Well-balanced schemes dry boundaries shallow water equations evolution Galerkin schemes source terms

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A Novel Full-Euler Low Mach Number IMEX Splitting

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Communications in Computational Physics 2020年第1期27卷 292-320页

作者： Jonas Zeifang Jochen Schutz Klaus Kaiser Andrea Beck Maria Lukacova-Medvid’ova Sebastian Noelle IAG Universiẗat StuttgartPfaffenwaldring 21DE-70569 StuttgartGermany Faculty of Sciences Hasselt UniversityAgoralaan Gebouw DBE-3590 DiepenbeekBelgium IGPM RWTH Aachen UniversityTemplergraben 55DE-52062 AachenGermany Institut f̈ur Mathematik Johannes Gutenberg-Universiẗat MainzStaudingerweg 9DE-55128 MainzGermany

In this paper,we introduce an extension of a splitting method for singularly perturbed equations,the socalled RS-IMEX splitting[Kaiser et al.,Journal of Scientific Computing,70(3),1390–1407],to deal with the fully compressible Euler *** straightforward application of the splitting yields sub-equations that are,due to the occurrence of complex eigenvalues,not hyperbolic.A modification,slightly changing the convective flux,is introduced that overcomes this *** is shown that the splitting gives rise to a discretization that respects the low-Mach number limit of the Euler equations;numerical results using finite volume and discontinuous Galerkin schemes show the potential of the discretization.

关键词： Euler equations low-Mach IMEX Runge-Kutta RS-IMEX

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Water System Management in Emergency Situations

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Journal of Geological Resource and Engineering 2015年第3期3卷 150-162页

作者： Milan Lindovsky sarka Krocova VAE CONTROLS Group a.s. Namesti Jurie Gagarina 233/1 Ostrava 710 00 Czech Republic Faculty of Safety Engineering Technical University of Ostrava Lumirova 13 Ostrava 700 300 Czech Republic

This article deals with the issue of water system management and emergency management of water supply systems based on experience with the operation of water systems in EU （European Union） Member States. The options available for prevention/elimination of the hazard of limited drinking water supply to the public are described. Current climate and, in some countries, also the existing social conditions pose barriers to a smooth water supply to the public. Various hazards endangering the quality and amounts of water produced emerge. Since the risk of water supply outages due to natural or anthropogenic factors cannot be completely eliminated （for instance, hacker attacks pose a new threat to the water companies＇ control systems）, in other words, emergency situations where smooth water supply is disturbed cannot be ruled out, efforts must be made to at least minimise adverse impacts of such events on the users. Organisational and technical conditions minimising such hazards must be set up. A water production and distribution organization and management system must be introduced, which will be able to prevent and address such hazards and emergency situations. How to tackle this complex task in the real water system management conditions and to assure some minimal amount of water at least for strategic consumers is discussed in this article. The results of a water system operation risk analysis are presented, feasible methods to minimize such risks are described, and options to prevent and address such risks are proposed. A water company organisation and management system taking into account the possibility of development of emergency situations is set forth. Focus is on the use of a telemetric system as a system means that facilitates the prevention and possible addressing of any emergencies occurring during the operation of a water supply system.

关键词： Emergency emergency water supply water system management hydraulic efficacy of the water supply system monitoring and telemetric system.

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Clinical comparative analysis of the outcomes with a yellow- and a violet-tinted intraocular lens

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International Journal of Ophthalmology(English edition) 2016年第1期9卷 166-169页

作者： Peter Mojzis Zdenek Bombera sarka Vesela Daniela Klapuchova Peter Ziak David P.Pinero Premium Clinic Teplice 41501 Czech Republic Eye Department of Regional Hospital in Havlickuv Brod Havlickuv Brod 58001 Czech Republic Eye Clinic of Jessenius Faculty of Medicine Martin 03601Czech Republic Department of Optics Pharmacology and AnatomyUniversity of Alicante San Vicente del Raspeig 03690Alicante Spain

Dear Sir,I am Dr. Peter Mojzis from Premium Clinic in Teplice （Czech Republic）. I write to present the results of a comparative study of clinical outcomes obtained with two different types of tinted intraocular lenses （IOLs）, yellow-vs violet-tinted IOLs. IOLs containing a yellow chromophore that filters simultaneously ultra violet （UV） and blue light were developed several years ago in the attempt of avoiding that blue and violet visible light reached the retina in the pseudophakic eye.

关键词： IOL and a violet-tinted intraocular lens Clinical comparative analysis of the outcomes with a yellow

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Ligand-induced dimerization of syndecan-3 at the cell surface

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Advances in Bioscience and Biotechnology 2013年第6期4卷 36-44页

作者： Evgeny Kulesskiy sarka Tumova Heikki Rauvala Multidisciplinary Cardiovascular Research Centre Institute of Membrane & Systems Biology Leeds UK Neuroscience Center University of Helsinki Helsinki Finland

Syndecan-3 (N-syndecan) is a transmembrane heparan sulfate proteoglycan abundantly expressed in developing brain. In addition to acting as a coreceptor, syndecan-3 acts as a signaling receptor upon binding of its ligand HB-GAM (heparin-binding growth-associated molecule;pleiotrophin), which activates the cortactin-src kinase signaling pathway. This leads to rapid neurite extension in neuronal cells, which makes syndecan-3 as an interesting transmembrane receptor in neuronal development and regeneration. However, little is known about the signaling mechanism of syndecan-3. Here we have analyzed formation of ligand-N-syndecan signaling complexes at the cell surface using fluorescence resonance energy transfer (FRET) and bioluminescence resonance energy transfer (BRET). We show that ligand binding leads to dimerization of syndecan-3 at the cell surface. The dimerized syndecan-3 colocalizes with actin in the filopodia of cells. Several amino acid residues (K383, G392 and G396) in the transmembrane domain are shown to be important for the ligand-induced dimerization, whereas the cytosolic domain is not required for the dimerization.

关键词： Syndecan-3 Dimerization HB-GAM Pleiotrophin BRET FRET

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