منابع مشابه
Sharp Polarimetric Eyes: More Trees than Forest?
The Fermi Gamma-ray Space Telescope (Fermi) has focused the intensive multi-wavelength and international observational effort on blazars since it was launched in 2008. Part of this effort involves systematic monitoring of the highly variable polarization of the continuum emission from these objects. These observations are valuable in that they provide direct information on the degree of orderin...
متن کاملThe firefighter problem with more than one firefighter on trees
In this paper we study the complexity of the firefighter problem and related problems on trees when more than one firefighter is available at each time step, and answer several open questions of [8]. More precisely, when b ≥ 2 firefighters are allowed at each time step, the problem is NP-complete for trees of maximum degree b+2 and polynomial-time solvable for trees of maximum degree b + 2 when...
متن کاملSeeing the forests for the more than the trees.
Assessing the health effects of deforestation is difficult because of the rate at which the world's forests are disappearing. From 1990 to 1995 alone, the world lost a total area of forest cover nearly twice the size of Italy. Deforestation, which is caused by human population growth and encroachment, clearance for agricultural production, and the growing worldwide demand for wood products, has...
متن کاملDecay rates of leaf litters from arbuscular mycorrhizal trees are more sensitive to soil effects than litters from ectomycorrhizal trees
1. While it is well established that leaf litter decomposition is controlled by climate and substrate quality at broad spatial scales, conceptual frameworks that consider how local-scale factors affect litter decay in heterogeneous landscapes are generally lacking. 2. A critical challenge in disentangling the relative impacts of and interactions among local-scale factors is that these factors f...
متن کاملMore hype than HOPE.
More Hype Than HOPE To the Editor: In the recently published Heart Outcomes Prevention Evaluation (HOPE study),1 treatment with the ACE inhibitor ramipril was reported to reduce cardiovascular morbidity and mortality independent of blood pressure (BP) reduction. High-risk “normotensive” (BP 140/80 mm Hg) patients (n 9541) were randomized to receive either 10 mg of ramipril or placebo in additio...
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ژورنال
عنوان ژورنال: Landscape Architecture Frontiers
سال: 2017
ISSN: 2095-5405
DOI: 10.15302/j-laf-20170514