Single-cycle pulses with a deterministic carrier-envelope phase enable the study and control of light–matter interactions at sub-cycle timescale, as well efficient generation low-noise multi-octave frequency combs. However, current single-cycle light sources are difficult to implement operate, hindering their application accessibility in wider range research. In this paper, we present 100 MHz c...

The radar cross section of spherical retroreflectors operating at terahertz frequencies is investigated. Several spherical retroreflectors with diameters ranging from 2 mm to 8 mm were fabricated and their radar cross section was measured at 100 GHz, 160 GHz, and 350 GHz. A frequency selective surface was applied to the retroreflectors to demonstrate proof of concept of narrow-band terahertz re...

BACKGROUND The association between epidural analgesia for labor and the risk of cesarean section for dystocia remains controversial The authors hypothesized that if epidural analgesia were an important factor in determining cesarean section rates, then obstetricians with higher rates of utilization of epidural analgesia for labor would have higher rates of cesarean section for dystocia. METHO...

A photonic approach for radio-frequency (RF) self-interference cancellation (SIC) incorporated in an in-band full-duplex radio-over-fiber system is proposed. dual-polarization binary phase-shift keying modulator used multiplexing at the central office (CO). local oscillator signal and intermediate-frequency carrying downlink data are single-sideband modulated on two polarization directions of m...

Determining the quantitative degree of connection between logging error and corresponding oil gas wells electrometry inverse problem solving is considered. A method to determine magnitude depending on for a given model single layer or section as whole described. Examples determining real well materials, taking into account actual measurement error, are given. characteristics spatial resolution ...

Abstract Single-carrier (SC) transmission is an appropriate transmission scheme for uplink transmission because of its low peak-to-average power ratio (PAPR). Spread spectrum (SS) transmission achieves higher frequency diversity gain and hence improves the bit error rate (BER) performance. The authors have recently proposed SC with frequency-domain spread spectrum (SC-FDSS) transmission with or...