Results 251 to 260 of about 3,333,618 (304)
Some of the next articles are maybe not open access.
Impactos da Covid-19 na Economia: limites, desafios e políticas
Cadernos de Prospecção, 2020Neste estudo são analisados os impactos da Covid-19 na economia. Especificamente são analisados os choques de oferta, demanda e financeiros, as políticas macroeconômicas e as lições e oportunidades. O artigo almeja responder à seguinte questão: quais são
R. R. F. Junior +1 more
semanticscholar +1 more source
The limitations of limitations
IEEE Intelligent Systems, 2003The authors consider human-centered computing, and argue that human factors and applied cognitive psychologists have not just been selective in regarding certain human characteristics as limitations, but have also selected the wrong things and for the wrong reasons.
Flach, John M., Hoffman, Robert R.
openaire +3 more sources
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
openaire +1 more source
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
openaire +1 more source
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
openaire +3 more sources
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
openaire +1 more source
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
openaire +1 more source
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.
openaire +2 more sources
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
openaire +1 more source
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
openaire +2 more sources
Que sais-je ?, 2010
Bien adaptes socialement, professionnellement, voire familialement, certains sujets peuvent beneficier d’un ancrage a la realite apparemment solide. Mais tres vite, ils revelent de grandes fragilites : une estime de soi alternant entre sentiment de toute-
Vincent Estellon
semanticscholar +1 more source
Bien adaptes socialement, professionnellement, voire familialement, certains sujets peuvent beneficier d’un ancrage a la realite apparemment solide. Mais tres vite, ils revelent de grandes fragilites : une estime de soi alternant entre sentiment de toute-
Vincent Estellon
semanticscholar +1 more source

