Insufficient attention to tasks can result in slips of action as automatic, unintended action sequences are triggered inappropriately. Such slips arise in part from deficits in sustained attention, which are particularly likely to happen following frontal lobe and white matter damage in traumatic brain injury (TBI). We present a reliable laboratory paradigm that elicits such slips of action and...

Research has shown that exposure to bright white light or blue-enriched light enhances alertness, but this effect is not consistently observed in tasks demanding high-level cognition (e.g., Sustained Attention to Response Task-SART, which measures inhibitory control). Individual differences in sensitivity to light effects might be mediated by variations in the basal level of arousal. We tested ...

Performance fluctuates systematically during the day, which fluctuation is referred to as ‘diurnal variation’. Performance is maximal at midday and minimal in the morning and at night . However, a continuous decline over the waking day is sometimes found . If multiple testing sessions are conducted during mid-afternoon, a post-lunch dip is sometimes found . In order to clarify the task differen...

PURPOSE The authors analyze a recently proposed polyenergetic version of the simultaneous algebraic reconstruction technique (SART). This algorithm, denoted polyenergetic SART (pSART), replaces the monoenergetic forward projection operation used by SART with a postlog, polyenergetic forward projection, while leaving the rest of the algorithm unchanged. While the proposed algorithm provides good...

INTRODUCTION There is conflicting evidence regarding impairment of sustained attention in early Alzheimer's disease (AD). We examine whether sustained attention is impaired and predicts deficits in other cognitive domains in early AD. METHODS Fifty-one patients with early AD (MMSE > 18) and 15 healthy elderly controls were recruited. The sustained attention to response task (SART) was used to...

We have previously identified mgrA (rat) as a regulator of autolysis in Staphylococcus aureus. Besides its effect on autolytic activity, we recently found alterations in the expression of regulator and target virulence genes in the mgrA mutant. Northern analysis and transcription fusion assays showed that inactivation of mgrA has led to the downregulation of RNAIII of agr and hla and upregulati...

OBJECTIVE To assess whether total reproductive potential (TRP), the chance of a live birth from each fresh cycle (fresh cycle plus frozen transfers), could be calculated from the national Society for Assisted Reproductive Technology Clinic Outcome Reporting System (SART CORS) database and whether information not available in SART CORS resulted in significant changes to the TRP calculation. DE...

Breast cancer is the most common in women and second world. Digital breast tomosynthesis (DBT) an effective medical imaging method. It can reduce overlap of tissue reconstructed images, which beneficial to early detection cancer. DBT uses projection data from a limited range angles simultaneous algebraic reconstruction technique (SART) based Since detector’s field view (FOV) limited, updates la...

This paper presents a novel reconstruction algorithm for binary tomography based on the movement of particles. Particle Aggregate Reconstruction Technique (PART) supposes that pixel values are particles, and that the particles can diffuse through the image, sticking together in regions of uniform pixel value known as aggregates. The algorithm is tested on four phantoms of varying sizes and numb...

The SART (Space Launcher Systems Analysis) group of the German Aerospace Center DLR has the task of examining all types of future space launch systems and the thereof required engines by means of modern, computer-aided methods. One of the fundamental aims is to reduce the cost of access to space through the identification of eligible technology. Activities range from stand-alone preliminary stu...