Simple motor reaction time to, visual stimuli in dependence of stimulus intensity was measured and the histograms representing the distribution of reaction time were constructed. It was found that the reaction time distributions are positively skewed for all stimulus intensities used. The mean value, the standard deviation as well as the coefficient of skewness increases as the stimulus intensi...

The reported resolution of timing the moment of impact in fast human movements differs widely depending on the task. Surprisingly, better timing is reported for the demanding task of batting a ball than for the much simpler task of tapping in synchrony with two hands. We wondered whether this is because a sizeable part of timing variability arises from misjudging the distance in the direction o...

The possibility of measuring pulmonary blood flow in patients with central arteriovenous shunts utilizing the initial portion of indicator-dilution curves was explored in 16 patients by comparing these values for pulmonary blood flow with determinations by the direct Fick method. A good correlation between Fick and indicator-dilution values was obtained, and no systematic differences were demon...

OBJECTIVES The aim of this study was to investigate the level of work engagement among Dutch dental hygienists. METHODS A total of 1,520 questionnaires were randomly distributed to the members of the Dutch Dental Hygienists' Association (Nederlandse Vereniging van Mondhygiënisten). The questionnaire consisted of the short form Utrecht Work Engagement Scale, a hypothesized three-factor structu...

We present a study of the sensitivity to rare D decays of a Tau-Charm Factory detector. We consider both flavour changing neutral currents and family number violating decays, and evaluate the impact of varying the solid angle coverage, lepton identification and neutral hadron identification of the detector. We find that stringent demands must be made on the detector design in order to effective...

Somatosensory information is critical to balance control and fall prevention in older adults. Recently, it has been shown that low-level input noise (electrical or mechanical) can enhance the sensitivity of the human somatosensory system. In this study, we tested the effect of low-level electrical noise, applied at the knee, on balance control in 13 healthy elderly volunteers. Subjects performe...

Today, while many researchers focus on the improvement of the regularization term in IR algorithms, they pay less concern to the improvement of the fidelity term. In this paper, we hypothesize that improving the fidelity term will further improve IR image quality in low-dose scanning, which typically causes more noise. The purpose of this paper is to systematically test and examine the role of ...

Immigration, immigration policies and education of immigrants alter competence levels. This study analysed their effects using PISA, TIMSS and PIRLS data (1995 to 2012, N=93 nations) for natives' and immigrants' competences, competence gaps and their population proportions. The mean gap is equivalent to 4.71 IQ points. There are large differences across countries in these gaps ranging from arou...

In this study of Oklahoma's universal pre-K program, the authors relied on a strict birthday eligibility criterion to compare "young" kindergarten children who just completed pre-K to "old" pre-K children just beginning pre-K. This regression-discontinuity design reduces the threat of selection bias. Their sample consisted of 1,567 pre-K children and 1,461 kindergarten children who had just com...

Simultaneous multislice acquisition using rosette trajectories (SMART) is a recently introduced functional magnetic resonance imaging pulse sequence that offers high-speed data acquisition by simultaneously exciting several slices. A drawback to its benefit of rapid acquisition is the cumulative effect of the systematic noise present in the off-resonant slices. In this work, a systematic noise ...