Trends in cancer mortality in the elderly and oldest old in South America.

Background: Little is known about trends in cancer among the older segments of the population, even less for South America.

Objective: To describe time trends in mortality of the most frequent causes of cancer death among the population aged 70 and over.

Methods: Using the World Health Organization´s Cancer Mortality Database, we studied trends in mortality from lung, colorectal, stomach, liver, prostate, breast, and cervical cancer from 1985 onwards.

Are Radial Pressure Waves Effective for the Treatment of Moderate or Mild to Moderate Erectile Dysfunction? A Randomized Sham Therapy Controlled Clinical Trial.

Introduction: Radial wave therapy is commercialized as an option for the management of erectile dysfunction. However, the mechanism of action of the radial waves differs substantially from shock waves, so the evidence gathered for shock wave therapy cannot be extrapolated, and there are very few clinical trials with the radial wave.

Aim: To assess the efficacy and safety of radial wave therapy compared with sham therapy for the treatment of moderate and mild to moderate erectile dysfunction.

Locating Ships Using Time Reversal and Matrix Pencil Method by Their Underwater Acoustic Signals.

This paper presents a technique, based on the matrix pencil method (MPM), for the compression of underwater acoustic signals produced by boat engines. The compressed signal, represented by its complex resonance expansion, is intended to be sent over a low-bit-rate wireless communication channel. We demonstrate that the method can provide data compression greater than 60%, ensuring a correlation greater than 93% between the reconstructed and the original signal, at a sampling frequency of 2.