We examine the rest frame energetics of 76 gamma-ray bursts (GRBs) with known redshift that were detected by the Swift spacecraft and monitored by the satellite’s X-ray Telescope (XRT). Using the bolometric fluence values estimated in Butler et al. (2007) and the last XRT observation for each event, we set a lower limit the their collimation corrected energy Eγ and find that a 68% of our sample...

Microspectrometers In article number 2200221, Haoxuan Sun, Liang Li, and co-workers demonstrate a new perovskite spectrometer design that is free from any optical or mechanical components only requires one detection point. Such breaks the long-standing restriction of footprint-resolution, represents an advance for hyperspectral imaging.

A long metal thread breaks more easily than a short one—an observation Leonardo da Vinci made in the 15th century. It all comes down to simple statistics: the larger an object, the more likely it is to contain a region that breaks when subject to stress. The fracture properties of brittle materials also depend on the disorder in their underlying structure: a homogeneous material like glass brea...

We train and test two probabilistic taggers for Arabic phrase break prediction on a purpose-built, “gold standard”, boundary-annotated and PoS-tagged Qur‟an corpus of 77430 words and 8230 sentences. In a related LREC paper (Brierley et al., 2012), we cover dataset build. Here we report on comparative experiments with off-the-shelf N-gram and HMM taggers and coarse-grained feature sets for synta...

Driver impairment due to fatigue induced drowsiness is a significant cause of vehicle collisions. One countermeasure that is currently being implemented is Fatigue Warning Systems (FWS) to alert drivers that are drowsy. Behavioural adaptation of drivers to a FWS was evaluated in a closed track study. Thirty-two drivers completed two lengthy overnight drives, separated by one week, with half the...

Purchasing power parity (PPP) has been one of the most enduring concepts in global economy. However, its validity questioned around for a long time. In this study, annual data on real effective exchange rates 64 countries or regions from 1994−2022 are used to conduct unit root test without structural breaks, followed by same containing two breaks. The result shows that with break leads an incre...