The objective of the project was to identify design elements of roundabouts that could be problematic to older drivers with a specific focus on traffic control measures. It introduces a new approach to the evaluation and pretesting of traffic control features through the use of video footage and animated videos. Focus groups formed the first phase of the project, and structured interviews the s...

Reverse halo sign (RHS), also called the atoll sign, was described as a rim of consolidation surrounding a center of ground-glass opacity on computed tomography (CT). Although RHS was previously considered as non-specific sign for various disorders, recent study showed that it is a strong indicator of pulmonary mucormycosis (PM). We present a case of PM with typical imaging presentation on CT, ...

A coarse-to-fine traffic sign classification algorithm is proposed. The task for traffic sign classification is to analyze the detected regions and determine the class of the sign in the region. By analyzing existing traffic sign classification algorithms, the major problem affecting the classification accuracy is pointed out. Based on this analysis, a coarse-tofine classification algorithm is ...

We read with interest the article by Lota et al. The authors report a case of lymphomatoid granulomatosis (LG) with an atypical CT finding of crescent sign for LG. Typically, LG patients with lung involvement can present with pulmonary infiltration and may later develop a reversed halo sign, a focal round area of ground-glass attenuation and surrounding airspace consolidation of crescent shape....

QCD in the ε-regime at nonzero baryon chemical potential µ is reviewed. The focus is on aspects of the sign problem which are relevant for lattice QCD. It is discussed how spontaneous chiral symmetry breaking and the sign problem are related through the spectrum of the Dirac operator. The strength of the sign problem is linked to the quark mass and the chemical potential. Specific implications ...

Given the importance of lexical frequency for psycholinguistic research and the lack of comprehensive frequency data for sign languages, we collected subjective estimates of lexical frequency for 432 signs in American Sign Language (ASL). Our participants were 59 deaf signers who first began to acquire ASL at ages ranging from birth to 14 years old and who had a minimum of 10 years of experienc...

BACKGROUND AND PURPOSE CT angiography spot sign predicts hematoma expansion in patients with acute intracerebral hemorrhage (ICH). The spot sign may represent a site of active extravasation, a locus of arrested hemorrhage forming fibrin globes, or represent associated epiphenomena such as hypertensive microaneurysms. We sought to describe the evolution of spot signs over 60 seconds in acute ICH...