Results 311 to 320 of about 3,788,707 (345)
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Towards a worldwide wood economics spectrum.
Ecology Letters, 2009Wood performs several essential functions in plants, including mechanically supporting aboveground tissue, storing water and other resources, and transporting sap. Woody tissues are likely to face physiological, structural and defensive trade-offs. How a
J. Chave +5 more
semanticscholar +1 more source
, 1970
Raman spectra are reported from single crystals of graphite and other graphite materials. Single crystals of graphite show one single line at 1575 cm−1.
F. Tuinstra, J. Koenig
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Raman spectra are reported from single crystals of graphite and other graphite materials. Single crystals of graphite show one single line at 1575 cm−1.
F. Tuinstra, J. Koenig
semanticscholar +1 more source
IEEE Transactions on Communications, 2000
Attractive features of time-hopping spread-spectrum multiple-access systems employing impulse signal technology are outlined, and emerging design issues are described.
M. Win, R. Scholtz
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Attractive features of time-hopping spread-spectrum multiple-access systems employing impulse signal technology are outlined, and emerging design issues are described.
M. Win, R. Scholtz
semanticscholar +1 more source
, 1965 Let T be a linear operator whose domain D(T) and range R(T) both lie in the same complex linear topological space X. We consider the linear operator $${T_\lambda } = \lambda I - T,$$ , where λ is a complex number and I the identity operator. The distribution of the values of λ for which T λ has an inverse and the properties of the inverse when ...
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Second Simulation of the Satellite Signal in the Solar Spectrum, 6S: an overview
IEEE Transactions on Geoscience and Remote Sensing, 1997Remote sensing from satellite or airborne platforms of land or sea surfaces in the visible and near infrared is strongly affected by the presence of the atmosphere along the path from Sun to target (surface) to sensor.
E. Vermote +4 more
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How to cope with the Spectrum of Spectrum
1995The specification language Spectrum [BFG+93] melts a wide range of concepts into a single language frame: three-valued first-order logic, polymorphism, type classes, higher-order functions, infinite objects. The desire of identifying and relating sub-languages satisfying certain constraints given by syntactical and pragmatic considerations appears.
U. Wolter +5 more
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Voice Spectrum and Sidetone Spectrum
1974When a speaker hears his own voice fed back to him with altered intensity or timing, he adjusts the properties of his speech to compensate for the apparent distortion of his message. These adjustments appear to be designed to provide the listener with intelligible messages rather than to provide the speaker with some acoustic feedback required for ...
A. P. Van Teslaar, Harlan Lane
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Spectrum Sharing and Spectrum Efficiency
SSRN Electronic Journal, 2007This policy paper for an Aspen Institute Roundtable on Spectrum Policy identifies obstacles to spectrum efficiency and policy changes that would increase efficiency and sharing of wireless resources.
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Spectrum usage model for smart spectrum
2019 IEEE/CIC International Conference on Communications Workshops in China (ICCC Workshops), 2019This paper focuses on a spectrum usage model in the time domain in the context of dynamic spectrum access (DSA). To achieve a sophisticated dynamic spectrum access, understanding the spectrum usage is an important task. We focus on duty cycle (DC) as a feature quantity of spectrum usage in the time domain and observed DC (O-DC) obtained from long-term ...
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