The LOPES-30 experiment, located at the site of the air shower experiment KASCADEGrande at Forschungszentrum Karlsruhe, Germany, is an array of 30 dipole antennas set-up to investigate the pulsed radio emission from cosmic ray air showers in the Earth’s atmosphere. After one year of measurements of the East-West polarization by all 30 antennas, recently, the LOPES-30 set-up was reconfigured to ...

This is the case of a 73 year-old female who presented to clinic complaining of pre-syncope. A 24-hour Holter monitor revealed multiple episodes of 2–2.5 s pauses associated with non-conducted P waves (Fig. 1). Careful examination of the rhythm strip revealed high-frequency, low-amplitude signal during and immediately prior to the pauses. This high-frequency low-amplitude signal was particularl...

This paper discusses spacecraft Doppler tracking, the current-generation detector technology used in the low-frequency (∼millihertz) gravitational wave band. In the Doppler method the earth and a distant spacecraft act as free test masses with a ground-based precision Doppler tracking system continuously monitoring the earth-spacecraft relative dimensionless velocity 2Δv/c = Δν/ν0, where Δν is ...

In this paper, we are concerned with the detection of point-like obstacles using elastic waves. We show that one type of waves, either the P or the S scattered waves, is enough for localizing the points. We also show how the use of S incident waves gives better resolution than the P waves. These affirmations are demonstrated by several numerical examples using a MUSIC type algorithm.

An experimental observation of a new nonlinear-modulation effect for longitudinal elastic waves is reported. The phenomenon is a direct elastic wave analogy with the so-called Luxemburg-Gorky (L-G) effect known over 60 years for radio waves propagating in the ionosphere. The effect consists of the appearance of modulation of a weaker initially non-modulated wave propagating in a nonlinear mediu...

Indications for Breast MRI Magnetic Resonance Imaging, or MRI, is a painless way to look inside the body and provide your doctor with specific information about certain areas of your body. MRI utilizes a combination of a magnetic field, radio waves, and computer processing to derive images. In certain cases, BREAST MRI can provide additional information about your breast structure which may not...

High-energy cosmic rays passing through the Earth’s atmosphere produce extensive showers whose charges emit radio frequency pulses. Despite the low density of the Earth’s atmosphere, this emission should be affected by the air refractive index because the bulk of the shower particles move roughly at the speed of radio waves, so that the retarded altitude of emission, the relativistic boost and ...

Rice crop quality evaluation method through regressive analysis between nitrogen content in the rice leaves and near infrared reflectance measurement data from near field, from radio wave controlled helicopter is proposed. Rice quality dependency on nitrogen of chemical fertilizer and water supply condition is evaluated. Also homogeneity of the rice crop quality in the paddy fields is evaluated...