Background: Gastric cancer (GC) is the most common gastrointestinal cancer in Iran. Helicobacter pylori (H. pylori) accounts as one of the main risk factors for gastric non-cardia cancer (GNCC). It is suggested that high serum selenium level may have a protective role in GNCC. In this cross-sectional study, we determined the serum Se level and the status of H. pylori infection in two population...

Significance: Signal contamination is a major hurdle in functional near-infrared spectroscopy (fNIRS) of the human head as NIR signal contaminated with changes corresponding to superficial tissue, therefore occluding information originating from cerebral region. For continuous wave, this generally handled through linear regression shortest source-detector (SD) distance intensity measurement all...

Widefield frequency-domain fluorescence lifetime imaging microscopy (FD-FLIM) is a fast and accurate method to measure the fluorescence lifetime, especially in kinetic studies in biomedical researches. However, the small range of modulation frequencies available in commercial instruments makes this technique limited in its applications. Here we describe a practical implementation of multi-frequ...

PURPOSE To evaluate the ability of frequency domain optical coherence tomography (fd-OCT) to estimate retinal neural loss in eyes with Alzheimer's disease (AD). We also verified the existence of a correlation between AD-related cognitive impairment and macular and peripapillary retinal nerve fiber layer (RNFL) thickness measurements. METHODS fd-OCT scans were obtained from 45 eyes of 24 patie...

Thermal properties and transport control are important for many applications, for example, low thermal conductivity is desirable for thermoelectrics. Knowledge of modewise phonon properties is crucial to identify dominant phonon modes for thermal transport and to design effective phonon barriers for thermal transport control. In this paper, we adopt time-domain (TD) and frequency-domain (FD) no...

Co-registered ultrasound (US) and frequency-domain photoacoustic radar (FD-PAR) imaging is reported for the first time in this paper. The merits of ultrasound and cross-correlation (radar) frequency-domain photoacoustic imaging are leveraged for accurate tumor detection. Commercial US imagers possess sophisticated, optimized software for rapid image acquisition that could dramatically speed-up ...

The physical nature of the fluorescence depletion (FD) effect and the possible way of its experimental study are discussed. The FD effect is used for many years as an efficient time-domain method of rotational spectroscopy for large polyatomic molecules [1-3]. In this method, the picosecond laser pulse is split into the pump and the probe pulses, which are focused at the molecular jet. Time and...

Array constraints are essential for handling data structures in automated reasoning and software verification. Unfortunately, the use of a typical finite domain (FD) solver based on local consistencybased filtering has strong limitations when constraints on indexes are combined with constraints on array elements and size. This paper proposes an efficient and complete FD-solving technique for ex...

We report recent results of the experimental study of capillary turbulence decay on the surface of quantum liquids: normal and superfluid He and liquid hydrogen. In our experiments the turbulent cascade of capillary waves was damped at high frequencies due to viscous dissipation. Turbulent spectrum in high-frequency dissipative region was described by exponential decay function which was in acc...

Full-duplex (FD) wireless - simultaneous transmission and reception on the same frequency is a promising technique that can significantly improve spectrum efficiency reduce communication latency in future networks. To enable FD operation, powerful self-interference (SI) signal leaking from transmitter (TX) into receiver (RX) needs to be suppressed canceled an extreme degree at antenna interface...