Introduction High intensity focused ultrasound (HIFU) is considered a noninvasive and effective technique for tumor ablation. Frequency and acoustic power are the most effective parameters for temperature distribution and the extent of tissue damage. The aim of this study was to optimize the operating transducer parameters such as frequency and input power in order to acquire suitable temperatu...

An array of 50 MHz quartz microbalances (QMBs) coated with a dendronized polymer was used to detect small amounts of volatile organic compounds (VOCs) in the gas phase. The results were compared to those obtained with the commonly used 10 MHz QMBs. The 50 MHz QMBs proved to be a powerful tool for the detection of VOCs in the gas phase; therefore, they represent a promising alternative to the mu...

This study proposes a self-powered food monitoring system that benefits from far-field RF Energy harvesting and deep learning techniques. Recent smart IoT systems for quality management mainly focused on the appearance of Total Volatile Organic Compounds (TVOCs) during preservation, which has limitations large power consumption, complex configuration, low accuracy. Different these methods, we a...

Objective(s): Scientific interest in potential mobile phone impact on human brain and performance has significantly increased in recent years. The present study was designed to evaluate the effects of mobile phone radiation on seizure threshold in mice. Materials and methods:BALB/c male mice were randomly divided into three groups: control, acute, and chronic mobile phone radiation for 30, 60, ...

INTRODUCTION Transendoscopic miniprobes (TEMPs) have nowadays precise indications, but may become a diagnostic alternative to both radial and sectorial endoscopic ultrasonography (EUS) in the near future. PATIENTS AND METHODS From November 1996 to July 2004 we carried out 620 examinations using TEMPs (124 during the last 12 months in 2003, with currently a mean of 11 examinations/month). Twen...

Tests were made with an RF feedback system with increased bandwidth around the 200 MHz Travelling Wave Cavities. The high intensity beam was stabilised just after injection but became again unstable at higher energies. Addition of the 800 MHz RF system in bunch shortening mode stopped instabilities at energies up to 450 GeV but could not control them on the flat top at maximum 200 MHz RF voltag...

We have obtained short exposure (3 s) time series of strong upper chromospheric and transition region emission lines from the quiet Sun with the SUMER instrument onboard SOHO during two 1 hour periods in 1996. With a Nyqvist frequency of 167 mHz and relatively high count rates the dataset is uniquely suited for searching for high frequency variations in intensity and Doppler velocity. From Mont...

PURPOSE Ultrasound therapy induces clinical healing of irradiated avascular mandibular bone and fractures. In vitro ultrasound in tissue culture has been shown to stimulate bone formation synthesis and bone remodeling factors and to stimulate osteoblast proliferation. Therefore, the aim of the present study was to investigate the effect of short-wave (1-MHz) and long-wave (45-kHz) ultrasound on...

An effective and widely tunable means of producing terahertz (THz) radiation using difference-frequency generation (DFG) in an organic N-benzyl-2-methyl-4-nitroaniline (BNA) crystal was demonstrated by optimizing the pump wavelengths. We calculated the (wideband) refractive index and coherence length mapping of BNA to establish the optimum phase-matching condition of the DFG configuration. To s...