Archive

This paper describes a procedural technique for transseptal puncture that uses brief pulses of radiofrequency energy delivered from a standard electrosurgical cautery generator through the needle tip. The approach is presented as a way to facilitate septal traversal when tissue is elastic, aneurysmal, or thickened,…

This paper reports four experiments examining how a ringing cell phone affects cognitive performance in laboratory tasks and a college classroom lecture. In the lab, auditory conditions (including a standard cell phone ring) produced slower responses than silence, with slower recovery in the ring and song conditions.…

This theoretical/engineering study models arrays of plasmonic core-shell nano-radiators positioned over layered substrates using a Green's function dipole approach. The model is validated with full-wave FDTD simulations. The authors report that nanoparticle arraying and multilayer substrate design can be used to…

This paper uses atomistic simulations to examine how a nonpolar nanoparticle suspended in water reorients under an applied electric field. The authors report that molecular-level effects increase the torque relative to continuum estimates and substantially speed up reorientation above a stated field threshold. The…

This theoretical/physics study investigates spectral properties of a spin-1/2 Heisenberg antiferromagnet on an anisotropic triangular lattice in a magnetic field. It reports that interchain interactions in a magnetic field generate dominant modes that behave as quasiparticles, featuring anomalous incommensurate…

This engineering study describes a focused-ion-beam-assisted technique for fabricating reduced-size NdFeB nanomagnets and integrating them onto a thin-film bulk acoustic resonator (FBAR). After bonding the magnet, the FBAR showed a downshift in resonance frequency and a reduced quality factor. The magnetic behavior…

This experimental animal study compared tympanic membrane closure time after myringotomy performed by microknife versus radiofrequency microcautery, with and without mitomycin C. Radiofrequency myringotomy differed significantly from knife myringotomy, and the 0.7 mm radiofrequency tip combined with mitomycin C was…

This in vitro study examined how cortical neuron morphology and cell type relate to responses under subthreshold and suprathreshold uniform electric fields in rat motor cortex slices. The authors report that morphology correlates with subthreshold somatic polarization and that layer V pyramidal neurons are predicted…

This paper presents a theoretical treatment of nanoparticle retention in quadrupole magnetic field-flow fractionation (QMgFFF) using a helical separation channel. It defines the retention ratio as the ratio of transit times for non-retained versus retained material. Equations are derived for angular and longitudinal…

This cross-sectional web-based survey assessed parents' concerns about managing their children's diabetes and their attitudes toward a mobile-phone-integrated glucometer service that could transmit real-time glucose readings. Parents most commonly reported concerns about access to their child's health care provider,…

This animal study exposed Sprague-Dawley rats to a 40 Hz, 7 mT time-variable magnetic field and measured ECG heart rate and plasma antioxidant capacity before and after exposure, including after 14 days. The authors report a significant decrease in heart rate after 14 days. Antioxidant defence findings were mixed,…

A meta-analysis of 63 publications assessed whether radiofrequency (RF) radiation exposure is associated with genetic damage in mammalian somatic cells using multiple genotoxicity endpoints. Overall differences between RF-exposed and control conditions were reported as small, though statistically significant…

This engineering/materials study describes blending PLLA and PGA using microwave irradiation to produce PLGA-related blends with varying constituent concentrations. The authors report that FTIR, NMR, and DSC measurements indicate blending and cross-linking between the polymers. The abstract does not provide microwave…

This study compared coronary plaque assessment by 64-slice multislice computed tomography (MSCT) with virtual histology intravascular ultrasound (VH IVUS) in 50 patients. The Agatston score on MSCT correlated moderately with calcium volume measured by VH IVUS, and MSCT plaque categories broadly reflected differences…

This paper reports calculations of interlayer electrical and thermal resistivity in a layered metal assuming Fermi-liquid quasiparticles inelastically scattered by two-dimensional antiferromagnetic spin fluctuations. The model yields linear-in-temperature behavior over a broad range and suggests that extrapolations…

This engineering study demonstrates a silicon-on-insulator (SOI) radio-frequency single-electron transistor (RF-SET) operating at temperatures above 4.2 K. The device was optimized to address high resistance in SOI SETs and showed stable transport characteristics after repeated thermal cycling. RF-SET operation was…

This animal study examined how postoperative immobilization affects healing after radiofrequency heat probe shrinkage in rabbit patellar tendons. Tendon length increased across all groups by 8 weeks, but 4 weeks of immobilization resulted in less elongation than free activity. Immobilized groups had reduced…