The Experts below are selected from a list of 227199 Experts worldwide ranked by ideXlab platform
Joachim Röschke - One of the best experts on this subject based on the ideXlab platform.
-
Effects of pulsed high-frequency Electromagnetic Fields on human sleep.
Neuropsychobiology, 2008Co-Authors: Klaus Mann, Joachim RöschkeAbstract:In the present study we investigated the influence of pulsed high-frequency Electromagnetic Fields of digital mobile radio telephones on sleep in healthy humans. Besides a hypnotic effect with shortening of sleep onset latency, a REM suppressive effect with reduction of duration and percentage of REM sleep was found. Moreover, spectral analysis revealed qualitative alterations of the EEG signal during REM sleep with an increased spectral power density. Knowing the relevance of REM sleep for adequate information processing in the brain, especially concerning mnestic functions and learning processes, the results emphasize the necessity to carry out further investigations on the interaction of this type of Electromagnetic Fields and the human organism.
-
Cardiac Autonomic Activity during Sleep under the Influence of Radiofrequency Electromagnetic Fields
Somnologie - Schlafforschung Und Schlafmedizin, 2005Co-Authors: Klaus Mann, Bernhard J. Connemann, Joachim RöschkeAbstract:Question of the study We investigated the influence of radiofrequency Electromagnetic Fields emitted by digital mobile telephones on heart rate variability (HRV) during sleep in healthy young men.
Jani Tervo - One of the best experts on this subject based on the ideXlab platform.
-
Cross-spectral purity of Electromagnetic Fields.
Optics letters, 2009Co-Authors: Timo Hassinen, Jani Tervo, Ari T. FribergAbstract:We extend Mandel's scalar-wave concept of cross-spectral purity to Electromagnetic Fields. We show that in the Electromagnetic case, assumptions similar to the scalar cross-spectral purity lead to a reduction formula, analogous with the one introduced by Mandel. We also derive a condition that shows that the absolute value of the normalized zeroth two-point Stokes parameter of two cross-spectrally pure Electromagnetic Fields is the same for every frequency component of the field. In analogy with the scalar theory we further introduce a measure of the cross-spectral purity of two Electromagnetic Fields, namely, the degree of Electromagnetic cross-spectral purity.
-
theory of partially coherent Electromagnetic Fields in the space frequency domain
Journal of The Optical Society of America A-optics Image Science and Vision, 2004Co-Authors: Jani Tervo, Tero Setala, Ari T. FribergAbstract:We construct the coherent-mode representation for fluctuating, statistically stationary Electromagnetic Fields. The modes are shown to be spatially fully coherent in the sense of a recently introduced spectral degree of Electromagnetic coherence. We also prove that the electric cross-spectral density tensor can be rigorously expressed as a correlation tensor averaged over an appropriate ensemble of strictly monochromatic vectorial wave functions. The formalism is demonstrated for partially polarized, partially coherent Gaussian Schell-model beams, but the theory applies to arbitrary random Electromagnetic Fields and can find applications in radiation and propagation and in inverse problems.
-
degree of coherence for Electromagnetic Fields
Optics Express, 2003Co-Authors: Jani Tervo, Tero Setala, Ari T. FribergAbstract:The relationship between the visibility of fringes and the degree of spatial coherence in Electromagnetic two-pinhole interference is assessed. It is demonstrated that the customary definition of the degree of coherence of an Electromagnetic field is flawed and a new quantity, free of the formal drawbacks, is introduced. The new definition, which is shown to be consistent with known results for Gaussian statistics, has some unusual properties characteristic only for Electromagnetic Fields. The degree of coherence is measurable by a sequence of interference experiments.
-
angular spectrum representation of partially coherent Electromagnetic Fields
Optics Communications, 2002Co-Authors: Jani Tervo, Jari TurunenAbstract:Angular spectrum representations are derived for the cross-spectral density matrices describing spatially partially coherent stationary Electromagnetic Fields. Far-field distributions and a general expression for radiant intensity are evaluated using asymptotic methods. As an illustration we provide far-field radiation patterns of Gaussian Schell-model sources.
-
Rotating scale-invariant Electromagnetic Fields.
Optics express, 2001Co-Authors: Jani Tervo, Jari TurunenAbstract:The concept of scalar Fields with uniformly rotating intensity distributions and propagation-invariant radial scales is extended to the case of Electromagnetic Fields with rotating but otherwise propagation-invariant states of polarization. It is shown that the conditions for field rotation are different for scalar and Electromagnetic Fields and that the electromagentic analysis brings in new aspects such as the possibility that different components of a rotating Electromagnetic field can rotate in opposite directions.
Ari T. Friberg - One of the best experts on this subject based on the ideXlab platform.
-
Cross-spectral purity of Electromagnetic Fields.
Optics letters, 2009Co-Authors: Timo Hassinen, Jani Tervo, Ari T. FribergAbstract:We extend Mandel's scalar-wave concept of cross-spectral purity to Electromagnetic Fields. We show that in the Electromagnetic case, assumptions similar to the scalar cross-spectral purity lead to a reduction formula, analogous with the one introduced by Mandel. We also derive a condition that shows that the absolute value of the normalized zeroth two-point Stokes parameter of two cross-spectrally pure Electromagnetic Fields is the same for every frequency component of the field. In analogy with the scalar theory we further introduce a measure of the cross-spectral purity of two Electromagnetic Fields, namely, the degree of Electromagnetic cross-spectral purity.
-
theory of partially coherent Electromagnetic Fields in the space frequency domain
Journal of The Optical Society of America A-optics Image Science and Vision, 2004Co-Authors: Jani Tervo, Tero Setala, Ari T. FribergAbstract:We construct the coherent-mode representation for fluctuating, statistically stationary Electromagnetic Fields. The modes are shown to be spatially fully coherent in the sense of a recently introduced spectral degree of Electromagnetic coherence. We also prove that the electric cross-spectral density tensor can be rigorously expressed as a correlation tensor averaged over an appropriate ensemble of strictly monochromatic vectorial wave functions. The formalism is demonstrated for partially polarized, partially coherent Gaussian Schell-model beams, but the theory applies to arbitrary random Electromagnetic Fields and can find applications in radiation and propagation and in inverse problems.
-
degree of coherence for Electromagnetic Fields
Optics Express, 2003Co-Authors: Jani Tervo, Tero Setala, Ari T. FribergAbstract:The relationship between the visibility of fringes and the degree of spatial coherence in Electromagnetic two-pinhole interference is assessed. It is demonstrated that the customary definition of the degree of coherence of an Electromagnetic field is flawed and a new quantity, free of the formal drawbacks, is introduced. The new definition, which is shown to be consistent with known results for Gaussian statistics, has some unusual properties characteristic only for Electromagnetic Fields. The degree of coherence is measurable by a sequence of interference experiments.
Klaus Mann - One of the best experts on this subject based on the ideXlab platform.
-
Effects of pulsed high-frequency Electromagnetic Fields on human sleep.
Neuropsychobiology, 2008Co-Authors: Klaus Mann, Joachim RöschkeAbstract:In the present study we investigated the influence of pulsed high-frequency Electromagnetic Fields of digital mobile radio telephones on sleep in healthy humans. Besides a hypnotic effect with shortening of sleep onset latency, a REM suppressive effect with reduction of duration and percentage of REM sleep was found. Moreover, spectral analysis revealed qualitative alterations of the EEG signal during REM sleep with an increased spectral power density. Knowing the relevance of REM sleep for adequate information processing in the brain, especially concerning mnestic functions and learning processes, the results emphasize the necessity to carry out further investigations on the interaction of this type of Electromagnetic Fields and the human organism.
-
Cardiac Autonomic Activity during Sleep under the Influence of Radiofrequency Electromagnetic Fields
Somnologie - Schlafforschung Und Schlafmedizin, 2005Co-Authors: Klaus Mann, Bernhard J. Connemann, Joachim RöschkeAbstract:Question of the study We investigated the influence of radiofrequency Electromagnetic Fields emitted by digital mobile telephones on heart rate variability (HRV) during sleep in healthy young men.
Kurt Straif - One of the best experts on this subject based on the ideXlab platform.
-
carcinogenicity of radiofrequency Electromagnetic Fields
Lancet Oncology, 2011Co-Authors: Robert Baan, Yann Grosse, Beatrice Laubysecretan, Fatiha El Ghissassi, Veronique Bouvard, Lamia Benbrahimtallaa, Neela Guha, Farhad Islami, Laurent Galichet, Kurt StraifAbstract:Robert Baan a, Yann Grosse a, Beatrice Lauby-Secretan a, Fatiha El Ghissassi a, Veronique Bouvard a, Lamia Benbrahim-Tallaa a, Neela Guha a, Farhad Islami a, Laurent Galichet a, Kurt Straif a, on behalf of the WHO International Agency for Research on Cancer Monograph Working Group In May, 2011, 30 scientists from 14 countries met at the International Agency for Research on Cancer (IARC) in Lyon, France, to assess the carcinogenicity of radiofrequency Electromagnetic Fields (RF-EMF). These assessments will be published as Volume 102 of the IARC Monographs.1
