56,543 research outputs found

    Entomopathogenic fungi and invasional meltdown

    Get PDF
    Invasive non-native (alien) species are considered to be one of the greatest threats to biodiversity (Millenium Ecosystem Assessment 2005) through predation, competition, hybridisation or as vectors of disease (Hulme et al., 2009). The movement of peole and goods is increasing the rate of invasive alien species arriving in countries around the globe. A recent inventory of alien species in Europe revealed a figure of 11000 species (Hulme et al., 2009) but it is recognised that this is a first approximation and likely to be an underestimate (Olenin & Didžiulis, 2009). The distinction between native species and alien species is problematic; species have been moving around the world over millennia and the origin of many species is uncertain. It is also evident that many archaeophytes and archaeozoans establish within native communities without detrimental effects on species and ecosystem processes (Pyšek et al., 2005). However, the small proportion of alien species that are problematic (invasive) are both ecologically and economically costly (Hulme et al., 2009). Furthermore, historically species movements have occurred within continents but in recent decades an increasing proportion of alien species are from other continents (Hulme et al., 2009). Alien species originating from within a continent are predicted to be less invasive than those from other continents (Hulme et al., 2009)

    The Role of Private Enterprise in Water Resources Development

    Get PDF

    Search Process Checklist

    Get PDF
    The Search Process Checklist is a tool that is used in instructional sessions with nurses in reference to evidence-based practice and literature searching. It is intended as a reference handout. It is under a creative commons license. If you would like a version that can be rebranded for your organization to use, please contact the author for an editable version

    VCU Health Nursing Inquiry Process Diagram (version 2)

    Get PDF
    This diagram outlines the nursing inquiry process to help answer questions that arise in the clinical setting. The diagram further helps a nurse understand how to distinguish whether a situation calls for evidence-based practice, performance improvement or research. It also guides a nurse through clarifying the initial question, gathering the evidence, and through each step in the subsequent process

    Baby Chick Troubles and Their Control

    Get PDF
    PDF pages:

    Lower bounds of characteristic scale of topological modification of the Newtonian gravitation

    Full text link
    We analytically work out the long-term orbital perturbations induced by the first term of the expansion of the perturbing potential arising from the local modification of the Newton's inverse square law due to a topology R^2 x S^1 with a compactified dimension of radius R recently proposed by Floratos and Leontaris. We neither restrict to any specific spatial direction for the asymmetry axis nor to particular orbital configurations of the test particle. Thus, our results are quite general. Non-vanishing long-term variations occur for all the usual osculating Keplerian orbital elements, apart from the semimajor axis which is left unaffected. By using recent improvements in the determination of the orbital motion of Saturn from Cassini data, we preliminarily inferred R >= 4-6 kau. As a complementary approach, the putative topological effects should be explicitly modeled and solved-for with a modified version of the ephemerides dynamical models with which the same data sets should be reprocessed.Comment: Latex, 6 pages, no tables, 1 figure, 3 references. Accepted for publication in International Journal of Modern Physics D (IJMPD

    What to Do If Simultaneous Presidential and Vice Presidential Inability Struck \u3ci\u3eToday\u3c/i\u3e

    Get PDF
    Dual incapacity is one of three major inability scenarios involving the Vice President that threatens the continuity of the executive branch. The current state of the law in this area, unfortunately, leaves only imperfect options for policymakers. This Article proposes that, in the event of a dual inability, the Speaker, the President pro tempore of the Senate, and the Cabinet should meet and then jointly declare that the Speaker is Acting President until either the President or Vice President regains capacity. At the same time, the Speaker—as the new Acting President—the President pro tempore, and the Cabinet should request that Congress ratify their decision and the process they undertook to reach that determination

    THE WATER RESOURCE PROBLEM

    Get PDF
    Resource /Energy Economics and Policy,

    Information Theory and Knowledge-Gathering

    Get PDF
    It is assumed that human knowledge-building depends on a discrete sequential decision-making process subjected to a stochastic information transmitting environment. This environment randomly transmits Shannon type information-packets to the decision-maker, who examines each of them for relevancy and then determines his optimal choices. Using this set of relevant information-packets, the decision-maker adapts, over time, to the stochastic nature of his environment, and optimizes the subjective expected rate-of-growth of knowledge. The decision-maker’s optimal actions, lead to a decision function that involves his view of the subjective entropy of the environmental process and other important parameters at each stage of the process. Using this model of human behavior, one could create psychometric experiments using computer simulation and real decision-makers, to play programmed games to measure the resulting human performance.decision-making; dynamic programming; entropy; epistemology; information theory; knowledge; sequential processes; subjective probability
    • …
    corecore