15 research outputs found

    Measurement of vector boson scattering and constraints on anomalous quartic couplings from events with four leptons and two jets in proton-proton collisions at root s=13 TeV

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    Among-population variation in monthly and annual survival of the Baja California Tree Frog, Pseudacris hypochondriaca curta, in desert oases of Baja California Sur, Mexico

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    Survival is an important component of the demography of an animal. We estimated monthly and annual survival probabilities of three populations of the Baja California Treefrog (Pseudacris hypochondriaca curta) inhabiting desert oases of Baja California Sur, Mexico. We used data from a two-year mark recapture study to estimate survival. Recapture probabilities varied widely among months and there was no clear temporal pattern underlying the fluctuations. Annual survival was 27 and 29% for two populations and 1% for the third population. This implies that the populations, particularly the third one, can persist only if there is steady and high recruitment. With annual survival as low as 1–29%, a lack of recruitment could quickly cause local extinction. Because immigration seems unlikely in these populations due to their isolation from other breeding populations, recruits must be produced locally. Non-native fish, crayfish, and frogs that prey on tadpoles may therefore be a threat for the persistence of the populations

    Improving communication in urban planning using TOPIC-COHESIE

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    Decision making in spatial planning often takes place in a complex and illdefined context. It includes a large number of actors, factors and -often uncertain- relations. Each of the actors or stakeholders has his or her individual perceptions, values and priorities. This paper presents the TOPIC system, which aims to support this process by interactively collecting and managing the information in a participatory stakeholder process. We focus on a specific version of TOPIC - named COHESIE - which includes functionality for qualitative, participatory modelling. By representing actor perspectives in an explicit and transparent way, the modelling process facilitates the discussion and improves the communication between the different parties. This paper will illustrate the use of TOPIC-COHESIE with a practical example related to urban planning in the Netherlands. The participants of the case study have evaluated TOPIC-COHESIE a useful tool for early stakeholder involvement, and obtaining a more integrated plan

    The PREDICTS database: a global database of how local terrestrial biodiversity responds to human impacts.

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    Biodiversity continues to decline in the face of increasing anthropogenic pressures such as habitat destruction, exploitation, pollution and introduction of alien species. Existing global databases of species' threat status or population time series are dominated by charismatic species. The collation of datasets with broad taxonomic and biogeographic extents, and that support computation of a range of biodiversity indicators, is necessary to enable better understanding of historical declines and to project - and avert - future declines. We describe and assess a new database of more than 1.6 million samples from 78 countries representing over 28,000 species, collated from existing spatial comparisons of local-scale biodiversity exposed to different intensities and types of anthropogenic pressures, from terrestrial sites around the world. The database contains measurements taken in 208 (of 814) ecoregions, 13 (of 14) biomes, 25 (of 35) biodiversity hotspots and 16 (of 17) megadiverse countries. The database contains more than 1\% of the total number of all species described, and more than 1\% of the described species within many taxonomic groups - including flowering plants, gymnosperms, birds, mammals, reptiles, amphibians, beetles, lepidopterans and hymenopterans. The dataset, which is still being added to, is therefore already considerably larger and more representative than those used by previous quantitative models of biodiversity trends and responses. The database is being assembled as part of the PREDICTS project (Projecting Responses of Ecological Diversity In Changing Terrestrial Systems - http://www.predicts.org.uk). We make site-level summary data available alongside this article. The full database will be publicly available in 2015

    Measurement of the inelastic proton-proton cross section at <tex>\sqrt{s}$</tex>=13 TeV

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    Measurement of the inelastic proton-proton cross section at root s=13 TeV

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    A measurement of the inelastic proton-proton cross section with the CMS detector at a center-of-mass energy of root s = 13 TeV is presented. The analysis is based on events with energy deposits in the forward calorimeters, which cover pseudorapidities of -6.6 4.1 GeV and/or M-Y > 13 GeV, where M-x and M-Y are the masses of the diffractive dissociation systems at negative and positive pseudorapidities, respectively. The results are compared with those from other experiments as well as to predictions from high-energy hadron-hadron interaction models
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