Manganese mineralization in andesites of Brestovačka Banja,Serbia: evidence of sea-floor exhalations in the Timok Magmatic Complex     

Aleksandar Pačevski  Vladica Cvetković  Kristina Šarić  Miodrag Banješević  Heidi Eva Hoefer  Aleksandar Kremenović 《Mineralogy and Petrology》2016,110(4):491-502

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Tips and tricks in designing management procedures   总被引：2，自引：2，他引：2  

Rademeyer  Rebecca A.; Plaganyi  Eva E.; Butterworth  Doug S. 《ICES Journal of Marine Science》2007,64(4):618-625

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Population structure of Merluccius merluccius along the Iberian Peninsula coast     

Castillo  Ana G.F.; Alvarez  Paula; Garcia-Vazquez  Eva 《ICES Journal of Marine Science》2005,62(8):1699-1704

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Boundary perturbation formalism for Poisson's equation     

Slavko Chalupka  Jaroslava Sisákova  Eva Vargová 《Studia Geophysica et Geodaetica》1992,36(4):325-328

Summary A formalism for solving Poisson's equation in near spherical geometries by a perturbation technique is presented. The formalism should be easy to implement numerically.  相似文献   

The border as an engine for mobility and spatial integration: A study of commuting in a Swedish–Norwegian context     

Cecilia Möller  Eva Alfredsson-Olsson  Birgitta Ericsson  Kjell Overvåg 《Norsk geografisk tidsskrift. Norwegian journal of geography》2018,72(4):217-233

The purpose of the study was to analyse how cross-border commuting differed from intranational commuting in Sweden, and how cross-border mobilities affected spatial integration. The authors analysed patterns and spatial flows of cross-border commuting by comparing them with characteristics of intranational commuting. In the article, they explore the assumption that the border constitutes an ‘engine’ for work-related mobility, which affects processes of spatial integration in cross-border areas. The empirical material comprised data from surveys of commuting from the Swedish county of Värmland to Norway and commuting within Värmland. The findings showed that cross-border commuting shared common features with intranational commuting, including how the frequency of commuting was dependent on distance. The motives for commuting differed, and the reasons for working in Norway were economic rather than professional. In terms of spatial integration, cross-border commuting was mainly one-directional, from Sweden to Norway, while leisure mobility and migration tended to be in the opposite direction. The authors conclude that the border region is characterised by integration through specialisation, which involves a permanent state of ‘transient’ mobility. Thus, a win-win situation can be distinguished, in which the border serves as a resource and an ‘engine’ for cross-border integration, mobility and economic activities.  相似文献   

Late Holocene environmental change in southwest Greenland – fossil insect assemblages from Tasiusaq     

Eva Panagiotakopulu  Paul Christopher Buckland 《Boreas: An International Journal of Quaternary Research》2013,42(1):160-172

Palaeoecological research based on insect remains from the vicinity of a Norse farm at Tasiusaq in southwest Greenland provides information on the area surrounding the farm and new information on extirpations attributed to human impact. Anthropochorous species (spread by people) from the farm faunas are lacking in the assemblages, and the natural faunas provide evidence of moderate exploitation of the landscape as a result of activities related to livestock. The gaps in the stratigraphic sequence of the site are interpreted to be the result of peat‐cutting for structural turfs or fuel, and the implications of this activity are discussed. Insect assemblages from Tasiusaq, and studies from Norse sites in Greenland, do not provide clear evidence for any distinct climatic event during the medieval period. In contrast to what happened on other islands of the North Atlantic, insects introduced to Greenland by the Norse did not find suitable natural habitats and did not survive after the demise of the farms. However, the landscape did not return entirely to its pre‐Landnám biota after the human colonizers disappeared from it. Our findings provide new evidence for the consequences of the Norse and their agricultural practices on the Greenlandic environment and additional information on the fate of insect introductions in the area during the late Holocene.  相似文献   

Earth System governmentality: Reflections on science in the Anthropocene     

Eva Lövbrand  Johannes Stripple  Bo Wiman 《Global Environmental Change》2009,19(1):7-13

This paper examines Earth System Science as a novel approach to global environmental change research. Drawing upon Michel Foucault's governmentality concept, the paper opens up the Earth System metaphor to political analysis and asks what it does to our understanding of nature and society as a governable domain. We trace the scientific practices that have produced the Earth System as a thinkable analytical category back to the International Geophysical Year in 1957. We also identify ‘the Anthropocene’ as a central and yet ambiguous system of thought for Earth System Science that harbours different strategies for sustainability in terms of (1) the persons over whom government is to be exercised; (2) the distribution of tasks and actions between authorities; and (3) contrasting ideals or principles for how government should be directed.  相似文献   

Rapid appraisal of rainfall threshold and selected landslides in Baguio,Philippines     

Dymphna Nolasco-Javier  Lalit Kumar  Arlene Mae P. Tengonciang 《Natural Hazards》2015,78(3):1587-1607

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Skin toxins in coral‐associated Gobiodon species (Teleostei: Gobiidae) affect predator preference and prey survival          下载免费PDF全文

Barbara Gratzer  Eva Millesi  Manfred Walzl  Juergen Herler 《Marine Ecology》2015,36(1):67-76

Predation risk is high for the many small coral reef fishes, requiring successful sheltering or other predator defence mechanisms. Coral‐dwelling gobies of the genus Gobiodon live in close association with scleractinian corals of the genus Acropora. Earlier studies indicated that the low movement frequency of adult fishes and the development of skin toxins (crinotoxicity) are predation avoidance mechanisms. Although past experiments showed that predators refuse food prepared with goby skin mucus, direct predator–prey interactions have not been studied. The present study compares the toxicity levels of two crinotoxic coral gobies – Gobiodon histrio, representative of a conspicuously coloured species, and Gobiodon sp.3 with cryptic coloration – using a standard bioassay method. The results show that toxin levels of both species differ significantly shortly after mucus release but become similar over time. Predator preferences were tested experimentally in an aquarium in which the two gobies and a juvenile damselfish Chromis viridis were exposed to the small grouper Epinephelus fasciatus. Video‐analysis revealed that although coral gobies are potential prey, E. fasciatus clearly preferred the non‐toxic control fish (C. viridis) over Gobiodon. When targeting a goby, the predator did not prefer one species over the other. Contrary to our expectations that toxic gobies are generally avoided, gobies were often captured, but they were expelled quickly, repeatedly and alive. This unusual post‐capture avoidance confirms that these gobies have a very good chance of surviving attacks in the field due to their skin toxins. Nonetheless, some gobies were consumed: the coral shelter may therefore also provide additional protection, with toxins protecting them mainly during movement between corals. In summary, chemical deterrence by crinotoxic fishes seems to be far more efficient in predation avoidance than in physical deterrence involving body squamation and/or strong fin spines.  相似文献   

Testing fundamental physics with distant star clusters: theoretical models for pressure-supported stellar systems     

Hosein Haghi  Holger Baumgardt  Pavel Kroupa  Eva K. Grebel  Michael Hilker  Katrin Jordi 《Monthly notices of the Royal Astronomical Society》2009,395(3):1549-1557

We investigate the mean velocity dispersion and the velocity dispersion profile of stellar systems in modified Newtonian dynamics (MOND), using the N -body code n-mody , which is a particle-mesh-based code with a numerical MOND potential solver developed by Ciotti, Londrillo & Nipoti. We have calculated mean velocity dispersions for stellar systems following Plummer density distributions with masses in the range of 10⁴ to  10⁹ M_⊙  and which are either isolated or immersed in an external field. Our integrations reproduce previous analytic estimates for stellar velocities in systems in the deep MOND regime  ( a _i, a _e≪ a ₀)  , where the motion of stars is either dominated by internal accelerations  ( a _i≫ a _e)  or constant external accelerations  ( a _e≫ a _i)  . In addition, we derive for the first time analytic formulae for the line-of-sight velocity dispersion in the intermediate regime  ( a _i∼ a _e∼ a ₀)  . This allows for a much-improved comparison of MOND with observed velocity dispersions of stellar systems. We finally derive the velocity dispersion of the globular cluster Pal 14 as one of the outer Milky Way halo globular clusters that have recently been proposed as a differentiator between Newtonian and MONDian dynamics.  相似文献