Normally wind measurements from Doppler radars rely on the presence of rain. During fine weather, insects become a potential radar target for wind measurement. However, it is difficult to separate ground clutter and insect echoes when spectral or polarimetric methods are not available. Archived reflectivity and velocity data from repeated 5 scans provide alternative methods. The probability of ...

INTRODUCTION In dynamic echo-planar imaging (EPI), such as functional MRI, where a time series of EPI images are collected, there is additional modulation along echo readout due to changes in hardware states (e.g., temperature) that the standard reference scan based phase correction methods [1-3] cannot account for, thereby resulting in an increase of ghost level over time. To address this prob...

Supernova (SN) light echoes could be a powerful tool for determining distances to galaxies geometrically, Sparks 1994. In this paper we present CCD photometry of the environments of 64 historical supernovae, the first results of a program designed to search for light echoes from these SNe. We commonly find patches of optical emission at, or close to, the sites of the supernovae. The color distr...

The serendipitous discovery of infrared echoes around the supernova remnant of Cas A by the Spitzer satellite has provided astronomers with a unique opportunity to study the properties of the echoing material and the history and nature of the outburst that generated these echoes. In retrospect, the echoes are also clearly visible as infrared “hot spots” in IRAS images of the region. In this pap...

Public support for responses to the coronavirus pandemic has sharply diverged on partisan lines in many countries, with conservatives tending oppose lockdowns, social distancing, mask mandates and vaccines, liberals far more supportive. This polarization may arise from way which attitudes of each side is echoed back them, especially media. In this paper, I argue that echo chambers are not blame...

We study the time evolution of test scalar and electromagnetic fields perturbations in configurations phantom wormholes surrounded by dark energy with state parameter $\omega< -1$. observe obvious signals echoes reflecting properties disclose physical reasons behind such phenomena. In particular, we find that equation has a clear imprint wave perturbations. When $\omega$ approaches divide $\ome...

The Paris Morgue is no more. It is to be replaced by an entirely new type of institution. The original Morgue, which overhangs the riverside close by Notre Dame, was founded in 1864. It was devoted to the reception of the bodies of those to whom death had come by other than natural means, and the bodies of people who had met with violent ends were in manjr cases preserved there for many years u...

A joint Board of Research for mental disease was recently formed in connection with the city and the University of Birmingham. The chairman is Sir Gilbert Barling, Bart. (Vice-Chancellor of the University of Birmingham), and the hon. director, Sir Frederick W. Mott. The co-operation of mental hospital authorities in the Midlands is sought, and a circular has been issued explaining the scheme. T...