Since the seminal work of John Chowning on the simulation of moving sound sources (Chowning 1971) there has been in computer music research a tremendous amount of work concerning perceptual sound space definition. Chowning's model implemented some complementary cues regarding localization, distance, and movement, among which we can recall (1) an interaction between spectral brightness and loudn...

We re-analyze the issue of redshifts induced by a moving cosmic string by looking at moving sources and observers on a conical spacetime in a fully relativistic approach. By replacing the concept of a moving spacetime with the more clearly defined concept of moving sources and observers in the string spacetime, we show that there is no effect: the only redshift is a Doppler shift due to the mot...

The detection performance of skywave HF over-the-horizon radars is fundamentally limited by ionospheric motion which causes spreading of surface clutter returns in Doppler space. This paper exploits a model for HF propagation through ionospheric irregularities based on a thin phase screen formulation which is used to derive the Doppler spread and the spatio-temporal dependence in the received f...

The skewness of broad Type 2-like spectra has been studied using data collected by two orthogonal CW 50-MHz radio links with co-located scattering volumes. Geometrical aspect angles of observations were about 10°. One short event was considered. For this event, the electron ̄ow direction was changing periodically (period about 9 minutes) presumably due to the passage of a magnetospheric MHD wav...

Pulsed Coherent Doppler Lidar (CDL) system is so good as to prove the feasibility of the marine atmosphere boundary layer detection. A ship-mounted Coherent Doppler lidar was used to measure the wind profile and vertical velocity in the boundary layer over the Yellow sea in 2014. Furthermore, for the purpose of reducing the impact of vibration during movement and correcting the LOS velocity, th...

This paper presents a new concept of algorithms for estimation of maximum frequency ( fmax) in the nonstationary Transcranial Doppler (TCD) signal. The improvement of estimator’s properties is achieved by exploiting the knowledge about dynamic properties of the blood flow. The raw estimates of fmax, calculated with a conventional algorithm for short segments of TCD signal, are smoothed and used...

Objective: To determine the diagnostic potential of a hand carried cardiac ultrasound (HCU) device (OptiGo, Philips Medical Systems) in a cardiology outpatient clinic and to compare the HCU diagnosis with the clinical diagnosis and diagnosis with a full featured standard echocardiography (SE) system. Methods: 300 consecutive patients took part in the study. The HCU examination was performed by ...

The lifetime of the 3163 keV, 7/2− isomeric state in Cl that decays by a stretched M2 transition to the 3/2 ground state, has been re-measured using the Doppler Shift Attenuation Method, by gating on the 1185 keV transition which directly feeds this state. This eliminates the uncertainties in the measurement arising from the direct feedings from the continuum. A mean life of 0.6 −0.2 ps has bee...

The notion of the rotational frequency shift, an analog of the Doppler shift, is introduced. This new frequency shift occurs for atomic systems that lack rotational invariance, but have stationary states in a rotating frame. The rotational frequency shift is given by the scalar product of the angular velocity and the angular momentum of the emitted photon in full analogy with the standard Doppl...

The velocity distributions of the optically pumped Cs frequency standard are measured using the sf pulse excitation method. The results are shifted toward higher beam velocity than the Maxwellian distribution and suggest a dependence on vacuum pressure. The velocity distribution is not sensitive to the laser power for pumping and detection, if the power is more than a few mW. The second-order D...