منابع مشابه
Have Ecosystem Services Been Oversold? A Response to Silvertown.
Silvertown [1] has addressed an important topic and expresses many concerns, some of which are warranted. The paradigm of ecosystem services (ES) divides researchers and therefore debate is welcome. Since paradigms, by their very nature, constrain the way we view things, critiques of what is gained and lost in taking a particular world view is always valuable. The ‘ES paradigm’ is no exception....
متن کاملHave we oversold the benefit of late-life exercise?
BACKGROUND Increasing exercise among older adults to improve function and prevent or decrease disability is widely promoted in developed countries. This review seeks to critically evaluate the degree to which existing scientific evidence supports these claims. METHODS A literature review was performed in Medline and Best Evidence databases for the years 1985 to 2000. Experimental and quasi-ex...
متن کاملWe Have Always Been . . . Cyborgs
philosophy of mathematics suited well the ‘‘general emphasisin later nineteenth-century mathematics on revisiting foundationalquestions’’ (p. 61). Pure geometry as it emerged from Frege, Paschand Hilbert, provided a diagram-free, purely sentential notion ofproof, which has lasted unto our own day.In the second, and greater, part of the book, Greaves traces outthe interre...
متن کاملHave Pentaquark States Been Seen?
The status of the search for pentaquark baryon states is reviewed in light of new results from the first two dedicated experiments from CLAS at Jefferson Lab and of new analyses from several labs on the Θ + (1540). Evidence for and against the heavier pentaquark states, the Ξ(1862) and the Θ 0 c (3100) observed at CERN and at HERA, respectively, are also discussed. I conclude that the evidence ...
متن کاملHave Orbitals Really Been Observed?
1492 Journal of Chemical Education • Vol. 77 No. 11 November 2000 • JChemEd.chem.wisc.edu The purpose of this article is to comment on the pedagogical ramifications of the recently claimed observation of d orbitals and the way in which these results were first announced and subsequently reported (1–6 ). Atomic orbitals—their use in writing electronic configurations and as a means of rationalizi...
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ژورنال
عنوان ژورنال: Trends in Ecology & Evolution
سال: 2015
ISSN: 0169-5347
DOI: 10.1016/j.tree.2015.08.007