Archive

This engineering/physical chemistry study quantified interfacial electric fields in dye-sensitized solar cells using a newly described electroabsorption signature. Reported field strengths depended on the electrolyte cation (higher for divalent cations) and were linked to TiO2(e−) + I3− charge recombination kinetics…

This engineering study assesses optimal RF frequencies for wireless communication with intraoral electronic devices using an intraoral tongue drive system as an example. It compares 27 MHz, 433.9 MHz, and 2.48 GHz based on path loss, radiation patterns, and bit error rate tests, with adaptive impedance matching…

This preliminary prospective clinical trial compared pulsed electromagnetic field stimulation (PEMF) and low intensity laser irradiation (LILI) as adjuncts to mandibular fracture repair assessed by clinical union and radiodensitometric bone density. Clinical outcomes (segment stability and occlusion) were…

This engineering study evaluates a nanoantenna design that combines concentric gold rings with a directivity-enhanced Raman scattering structure. Using finite-difference time-domain simulations and SERS measurements on fabricated devices with thiophenol, the authors report stronger electric field enhancement,…

This cross-sectional questionnaire study assessed how orthopaedic residents and consultants in Karachi used smartphones for clinical work and academics. Most respondents owned smartphones and reported using apps and internet/email, but fewer used them to share clinical data. The paper does not assess electromagnetic…

This engineering/materials study examined how RF magnetron sputtering power affects the structural and optical properties of In2S3 thin films intended as a CdS buffer substitute in CIGS solar cells. Films deposited at 60–120 W were characterized using XRD, AFM, EDS, and UV-visible spectrophotometry. The films were…

This engineering study reports optical and electrical characteristics of photonic gel cells made from a PS-b-P2VP lamellar film and a hydrogel electrolyte on ITO glass. Applying 2 V between two facing electrodes over 30 minutes shifted the device reflectance peak from 538 nm up to 604 nm with limited bandwidth…

This study describes the design, pilot testing, and validation of a mobile phone application version of the Guatemala NEMS-S supermarket survey. In a single supermarket, the app demonstrated high interrater reliability relative to the paper version and good test-retest reliability. The app also reduced survey…

This engineering/medical physics study used Monte Carlo simulations to examine how a uniform transverse magnetic field affects the dose distribution of a 30 MeV electron beam in a water phantom. The abstract reports substantial changes in depth-dose, including reduced range and a pronounced end-of-range dose peak…

This animal study compared rat liver and blood serum enzyme activities after a total two-hour exposure to low-intensity 900 MHz electromagnetic fields delivered as either a single or fractional schedule. The authors report that creatine kinase (liver and serum) and serum alkaline phosphatase were the most sensitive…

This case report describes a 30-year-old male admitted with intermittent fresh blood expectoration for three days and later found to have a small bleeding site on the posterior surface of the left tonsil. The authors diagnosed spontaneous tonsillar hemorrhage. They report successful management using low-temperature…

This study develops and tests a theoretical model of how HeLa cells aggregate when exposed to a uniform AC electric field. Model-derived aggregation times and predicted string-length growth rates matched numerical simulation, and experiments observed substantial clustering in the chamber. The work is framed as…

This case report describes a 24-year-old woman with a rare pleomorphic adenoma of the nasal septum. The tumor was identified on CT imaging, diagnosed by incisional biopsy, and removed endoscopically with histology confirming pleomorphic adenoma. The report focuses on clinical management rather than evaluating…

This animal study reports that combined static (42 μT) and very weak alternating (250 nT) magnetic fields can modulate the duration of metamorphosis in Tenebrio molitor pupae depending on the alternating-field frequency. A shorter pupal stage was reported at 4.4 Hz, an inhibiting effect at 32.2 Hz, and no noticeable…

The paper reviews and analyzes mechanisms for resonance action of extremely weak alternating magnetic fields (40 nT) combined with weak static fields (40 μT), tuned to cyclotron frequencies. It references prior reports of narrow resonant peaks in electrical conductivity of aqueous solutions and biomedical effects in…

This prospective clinical study followed patients with lumbar radiculopathy from contained disc herniations treated with radiofrequency-assisted micro-tubular decompression and nucleotomy. Among those with 4-year follow-up, pain scores improved substantially and most respondents reported satisfaction with quality of…

This engineering study assesses the risk of failure of composite high-voltage insulators in desert environments where sand accumulation and moisture can create conductive layers and leakage currents. Using realistic Sinai sand grain size and salinity data and an ABB composite insulator as a case study, the authors…

This engineering paper describes a third-order continuous-time current-mode ΣΔ modulator designed for WLAN 802.11b applications. It proposes a modified current mirror integrator and a dynamic latch-based current comparator aimed at improving bandwidth, linearity, and sampling rate. The authors report >60 dB dynamic…

This paper presents an engineering approach for real-time ECG signal processing on a mobile phone with remote transmission to a medical center. The method uses an IIR low-pass filter and Hilbert transform to support R-peak detection and arrhythmia alerting. Reported algorithm performance includes 96.97% sensitivity…