Results 91 to 100 of about 98,902 (310)
Diversity, 2013 In the terrestrial environment, endemic species and isolated populations of widespread species have the highest rates of extinction partly due to their low genetic diversity.
Philip L. Munday +4 more
doaj +1 more source
Principles and Mechanisms of Wildlife Population Persistence in the Face of Disease
Frontiers in Ecology and Evolution, 2020 Emerging infectious diseases can result in species declines and hamper recovery efforts for at-risk populations. Generalizing considerations for reducing the risk of pathogen introduction and mitigating the effects of disease remains challenging and ...
Robin E. Russell +5 more
doaj +1 more source
Extinction in a branching process: Why some of the fittest strategies cannot guarantee survival [PDF]
arXiv, 2012 The fitness of a biological strategy is typically measured by its expected reproductive rate, the first moment of its offspring distribution. However, strategies with high expected rates can also have high probabilities of extinction. A similar situation is found in gambling and investment, where strategies with a high expected payoff can also have a ...
arxiv
A Model of Pathways to Artificial Superintelligence Catastrophe for Risk and Decision Analysis [PDF]
, 2016 An artificial superintelligence (ASI) is artificial intelligence that is significantly more intelligent than humans in all respects. While ASI does not currently exist, some scholars propose that it could be created sometime in the future, and furthermore that its creation could cause a severe global catastrophe, possibly even resulting in human ...
arxiv +1 more source
Scintillation Response of 0D Cs3Cu2I5 Thin Layers to Light‐ and Heavy‐Ion Irradiation
Advanced Photonics Research, EarlyView.Driven by increasing interest in uncovering the remarkable photoluminescence quantum yield of Cs3Cu2I5, polycrystalline thin layers are synthesized to investigate its radioluminescence response to energetic ions. Its spectroscopic capability is assessed in a wide range of ion mass and internal excitation processes are explored.
Mátyás Hunyadi +6 more
wiley +1 more source
Functional Optical Fibers with Tailored Side Emission from Modified Rod‐in‐Tube Preforms
Advanced Photonics Research, EarlyView.A modified rod‐in‐tube method enables fabrication of functional optical fibers with tailored light‐diffusing properties. The approach incorporates optically active species at a well‐defined radial position within an otherwise homogeneous fiber core. Using lanthanide ions and noble metal nanoparticles as active species demonstrates wavelength conversion
Jan Schröder +4 more
wiley +1 more source
Plants, People, PlanetSocietal Impact Statement Native medicinal plants contribute essential health benefits to populations globally, constituting a major natural resource that human societies rely on.
Spyros Theodoridis +2 more
doaj +1 more source
Counting the cost of overfishing on sharks and rays
eLife, 2014 Over half of all shark and ray species are at risk of extinction or at least heading that way.
Darcy Bradley, Steven D Gaines
doaj +1 more source
Predation effects on mean time to extinction under demographic stochasticity [PDF]
arXiv, 2012 Methods for predicting the probability and timing of a species' extinction are typically based on a combination of theoretical models and empirical data, and focus on single species population dynamics. Of course, species also interact with each other, forming more or less complex networks of interactions.
arxiv
Advanced Sensor Research, EarlyView.Fast response, zero‐power, text or image sensors utilizing light transmission or reflection, and no unfavorable color change judgments, are fabricated using printed nematic liquid crystals patterned on reactive alignment layers, permit ppt‐ to ppb‐level sensitivity, and were field‐tested with active firefighters.
Ryan A. Williams +9 more
wiley +1 more source