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Global Biogeochemical Cycles, 2017
AbstractPhosphorus is believed to be the globally limiting nutrient in the modern ocean, but a number of nutrients have been invoked as limiting the Proterozoic biosphere. Mass balance calculations suggest that Proterozoic net primary productivity must have been 1 to 2 orders of magnitude less than today in order to maintain low oxygen levels despite ...
Thomas A. Laakso, Daniel P. Schrag
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AbstractPhosphorus is believed to be the globally limiting nutrient in the modern ocean, but a number of nutrients have been invoked as limiting the Proterozoic biosphere. Mass balance calculations suggest that Proterozoic net primary productivity must have been 1 to 2 orders of magnitude less than today in order to maintain low oxygen levels despite ...
Thomas A. Laakso, Daniel P. Schrag
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The Limits of the Nonlinear Shannon Limit
Optical Fiber Communication Conference, 2016Recent results about information theoretical limits in optical fibers are reviewed and the significance of what is commonly known as the nonlinear Shannon limit discussed. It is shown that this limit can be improved, while the actual channel capacity at high powers still remains substantially unknown.
SECONDINI, Marco, FORESTIERI, Enrico
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The Journal of the Acoustical Society of America, 1998
Today, traffic noise due to cars, trains, and airplanes is the main noise source in urban areas. In accordance with the European Commission’s Green paper on Future Noise Policy, 22% of the European population are exposed to outdoor A-weighted noise levels higher than 65 dB and more than 45% are exposed to levels between 55 and 65 dB.
Tor Kihlman, Wolfgang Kropp
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Today, traffic noise due to cars, trains, and airplanes is the main noise source in urban areas. In accordance with the European Commission’s Green paper on Future Noise Policy, 22% of the European population are exposed to outdoor A-weighted noise levels higher than 65 dB and more than 45% are exposed to levels between 55 and 65 dB.
Tor Kihlman, Wolfgang Kropp
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The Limitations of “Limitations”
The American Journal of Bioethics, 2004It is heartening to see the authors of “Limitations” (Levine et al. 2004) lamenting that, as a salient concept in research ethics, vulnerability has been a mess.
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Barriers, Limits and Limitations to Resilience
Journal of Extreme Events, 2015Enhancing resilience has become a key element of preparedness for extreme events and climate change. While much progress has been made in defining components of resilience, many questions remain about identification of appropriate strategies for building resilience, barriers to implementation of these strategies, and limits to the potential ...
Robin Leichenko +2 more
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Limited Wegener’s granulomatosis—is it limited?
Clinical Rheumatology, 2007Complete heart block associated with Wegener's granulomatosis (WG) is rare especially in the limited form of the disease. We describe a case of a 43-year-old woman with a limited form of WG who developed a complete heart block. Prompt treatment with steroids and cyclophosphamide led to temporary regression of complete heart block.
Svetlana, Lisitsin +2 more
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2016
The idea that there might be “limits to growth” is a key and contested feature of environmental politics. This chapter outlines the limits to growth thesis, describes and assesses critical reactions to it, and comments upon its relevance today. It argues that, after an initial highpoint in the early 1970s, the thesis declined in importance during the ...
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The idea that there might be “limits to growth” is a key and contested feature of environmental politics. This chapter outlines the limits to growth thesis, describes and assesses critical reactions to it, and comments upon its relevance today. It argues that, after an initial highpoint in the early 1970s, the thesis declined in importance during the ...
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The Limits of the Limits of Arbitrage
Review of Finance, 2009Abstract We test the limits of arbitrage argument for the survival of irrationality-induced financial anomalies by sorting securities on their individual residual variability as a proxy for idiosyncratic risk – a commonly asserted limit to arbitrage – and comparing the strength of anomalous returns in low versus high residual variability
Alon Brav, J.B. Heaton, Si Li
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2010
We show that within the Gold paradigm for language learning an informer for a superfinite set can cause an optimal MDL learner to make an infinite amount of mind changes. In this setting an optimal learner can make an infinite amount of wrong choices without approximating the right solution.
Adriaans, P., Mulder, W.
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We show that within the Gold paradigm for language learning an informer for a superfinite set can cause an optimal MDL learner to make an infinite amount of mind changes. In this setting an optimal learner can make an infinite amount of wrong choices without approximating the right solution.
Adriaans, P., Mulder, W.
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MARKET LIMITS AND THEIR LIMITS
Economics and Philosophy, 2012Although the market is widely regarded as the best way of organizing complex modern economies, many who take this view also believe that certain limits should be placed on its range of application. Despite its many virtues, there are some things that should not be provided through the market, or whose sale and purchase is morally problematic.
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