Publications by authors named "H R Frey"
On 3 October 2023, a multihazard cascade in the Sikkim Himalaya, India, was triggered by 14.7 million m of frozen lateral moraine collapsing into South Lhonak Lake, generating an ~20 m tsunami-like impact wave, breaching the moraine, and draining ~50 million m of water. The ensuing Glacial Lake Outburst Flood (GLOF) eroded ~270 million m of sediment, which overwhelmed infrastructure, including hydropower installations along the Teesta River.
View Article and Find Full Text PDFWe demonstrate a versatile THz waveguide platform for tailored THz-induced orientation and alignment of gas molecules. The underlying waveguide structure is dispersionless, with a refractive index close to one, and enhances the electric as well as the magnetic field up to a factor of five. These properties increase the detected transient birefringence signal by more than an order of magnitude compared to conventional THz free space focusing.
View Article and Find Full Text PDFWe demonstrate the reconstruction of the instantaneous polarization state of ultrafast laser pulses through vectorial time-domain ptychography. We introduce the formalism, investigate the algorithm's capacities through simulations, and finally validate it by reconstructing several polarization states from experiments.
View Article and Find Full Text PDFArticle Synopsis
- Shoulder dystocia is a childbirth complication linked to neonatal problems, with higher maternal prepregnancy body mass index (BMI) recognized as a risk factor, but the impact of BMI on neonatal outcomes specifically after shoulder dystocia isn't thoroughly researched.
- This study aimed to explore the relationship between maternal prepregnancy BMI and neonatal adverse outcomes following shoulder dystocia, including the frequency and types of delivery maneuvers used based on the mother's BMI.
- Analyzing data from 872 cases of shoulder dystocia, the results showed no significant difference in the duration of the complication across BMI groups, although those with a BMI ≥35 kg/m faced more delivery challenges requiring specific maneuvers. *
Article Synopsis
- - The study aimed to see if treating mild chronic hypertension (CHTN) during pregnancy would lead to fewer unplanned healthcare visits after childbirth.
- - An analysis of 2,293 pregnant patients showed that overall unplanned healthcare utilization rates were similar between the treatment and control groups, though emergency visits were notably lower in the treated group.
- - Factors like higher BMI and cesarean deliveries were found to increase the likelihood of needing unplanned postpartum care, even though treating mild CHTN showed some specific benefits.