نتایج جستجو برای: radio waves

تعداد نتایج: 209947  

Journal: :Biochemical Journal 2007

2004
E. Nielsen

A radio wave correlation experiment using a Mills Cross technique can be used to observe the cosmic noise intensity from the ground for the purpose of determining the absorption in the ionosphere. To ensure a time resolution of 10 to 20 s of the absorption observations, it is necessary that the autocorrelation function of the signal received within a wanted spatial resolution and in a given rec...

2014
Alexander A Potapov

Application of fractal-scaling analysis methods to the investigation of thermal radio radiation in the millimeter radio waves range and with presence of artificial perturbations of ionosphere has been considered in this work.

2007
Masaharu Hata Shigeru Tomisato

*1 WiMAX: A wireless communication system based on the IEEE802.16 standard defined by IEEE, a worldwide standardization body. *2 3GPP LTE: A standard being studied as an enhancement of Third-Generation communication systems at 3GPP, an organization standardizing Third-Generation communication systems (FOMA). *3 Symbol: In this article, a vector that determines the amplitude and phase of a radio...

1997
Em Re Sari

The detection of delayed emission in X-ray, optical and radio wave length, " afterglow " , following a γ-ray burst can be described by the emission of a relativistic shell decelerating upon collision with the ISM. We show that the observed radiation surface have well defined bright edges. We derive an explicit expression for the size as a function of time, and obtain the surface brightness dist...

2013
Colin Davidson

Figure 1 shows an infra-red spectrum gathered by a satellite looking down towards the Earth from around 20km. This spectrum shows the intensity of emission plotted against frequency (wavenumber). The energy depicted is mostly radiated from the surface of the Earth, which is almost a perfect blackbody and radiates radio waves in the infra-red frequency band. The imperfections in the shape of the...

2013
John Frederick Sweeney

Vedic Physics theory posits that Super Conductivity occurs amidst the 18 types of Quarks in the Thaamic type of matter, known as the Substratum, A.K.A. “Black Hole.” Specifically, Super Conductivity occurs at at an approximate phase related velocity, between the 4 th .and 6th power of light velocity, identified as Moha Thaama to Andha Thaama states. These states correspond to the Quark and Plan...

2004
Janusz Młynarczyk Andrzej Kułak

In the presentation the most important proprieties of the radio wave propagation in the ionosphere are explained and its impact on the high performance radio transmissions is discussed. The principles of the orthogonal frequency division multiplexing is explained and new digital radio system based on this principle is presented. Then some experimental data registered in Cracow in Poland are sho...

2006
P. Louarn

Owing to the complete and precise wave/particle measurements performed by the Viking and FAST spacecraft in the sources of the terrestrial Auroral Kilometric Radiation, the conditions of generation of this coherent radio emission are now well documented. It has been demonstrated that the production of radio waves occurs in thin laminar regions that exactly correspond to the regions of auroral p...

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