Results 201 to 210 of about 94,924 (252)
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Bell System Technical Journal, 1933
Part I of this paper first describes a method of measuring attenuation and field strength in the ultra-short-wave range. A resume of some of the quantitative experiments carried out in the range between 17 megacycles (17 meters) and 80 megacycles (3.75 meters) and with distances up to 100 kilometers is then given.
Schelleng, J. C. +2 more
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Part I of this paper first describes a method of measuring attenuation and field strength in the ultra-short-wave range. A resume of some of the quantitative experiments carried out in the range between 17 megacycles (17 meters) and 80 megacycles (3.75 meters) and with distances up to 100 kilometers is then given.
Schelleng, J. C. +2 more
openaire +3 more sources
2014
Wave phenomena are used to evaluate material properties nondestructively as well as to locate and measure defects in critical structures. In fact, physical acoustics is directly related to ultrasound since the ultrasonic waves are employed to determine the properties of materials.
CARCANGIU, SARA +2 more
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Wave phenomena are used to evaluate material properties nondestructively as well as to locate and measure defects in critical structures. In fact, physical acoustics is directly related to ultrasound since the ultrasonic waves are employed to determine the properties of materials.
CARCANGIU, SARA +2 more
openaire +1 more source
1979
Abstract : There were a number of significant accomplishments during the past 3 years. In this period, 12 papers were published in refereed journals, 4 papers were published as chapters in books and conference proceedings, 7 papers were accepted for publication, and 28 invited lectures were presented.
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Abstract : There were a number of significant accomplishments during the past 3 years. In this period, 12 papers were published in refereed journals, 4 papers were published as chapters in books and conference proceedings, 7 papers were accepted for publication, and 28 invited lectures were presented.
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2003
Abstract This chapter investigates some aspects of wave propagation with a major focus on the effects of linear constitutive properties (functions or functionals). A detailed analysis of time-harmonic waves in uniform materials is given and classical topics on plane waves are re-visited, such as waves in magneto-hydrodynamics or in ...
Mauro Fabrizio, Morro Angelo
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Abstract This chapter investigates some aspects of wave propagation with a major focus on the effects of linear constitutive properties (functions or functionals). A detailed analysis of time-harmonic waves in uniform materials is given and classical topics on plane waves are re-visited, such as waves in magneto-hydrodynamics or in ...
Mauro Fabrizio, Morro Angelo
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2015
Abstract This chapter is an introduction to wave phenomena and propagation in linear media. The existence of travelling waves and the dymanics of wave packets are studied. The dispersion equation, phase speed, group speed, the uncertainty principle, and energy transport relations are analysed in detail.
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Abstract This chapter is an introduction to wave phenomena and propagation in linear media. The existence of travelling waves and the dymanics of wave packets are studied. The dispersion equation, phase speed, group speed, the uncertainty principle, and energy transport relations are analysed in detail.
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10th International Conference on Mathematical Methods in Electromagnetic Theory, 2004., 2004
Mohammad Kolbehdari, Matthew Sadiku
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Mohammad Kolbehdari, Matthew Sadiku
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Challenges and opportunities of gravitational-wave searches at MHz to GHz frequencies
Living Reviews in Relativity, 2021Odylio D Aguiar +2 more
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