4 research outputs found
Raw Data Is All You Need: Virtual Axle Detector with Enhanced Receptive Field
Rising maintenance costs of ageing infrastructure necessitate innovative
monitoring techniques. This paper presents a new approach for axle detection,
enabling real-time application of Bridge Weigh-In-Motion (BWIM) systems without
dedicated axle detectors. The proposed method adapts the Virtual Axle Detector
(VAD) model to handle raw acceleration data, which allows the receptive field
to be increased. The proposed Virtual Axle Detector with Enhanced Receptive
field (VADER) improves the score by 73\% and spatial accuracy by 39\%,
while cutting computational and memory costs by 99\% compared to the
state-of-the-art VAD. VADER reaches a score of 99.4\% and a spatial
error of 4.13~cm when using a representative training set and functional
sensors. We also introduce a novel receptive field (RF) rule for an object-size
driven design of Convolutional Neural Network (CNN) architectures. Based on
this rule, our results suggest that models using raw data could achieve better
performance than those using spectrograms, offering a compelling reason to
consider raw data as input
Effects of caffeine on cognitive and autonomic measures in heavy and light caffeine consumers
Acute serotonin and dopamine depletion improves attentional control : findings from the Stroop task
Schizophrenia is associated with impairments of attentional control on classic experimental paradigms such as the Stroop task. However, at a basic level the neurochemical mechanisms that may be responsible for such impairments are poorly understood. In this study, we sought to investigate the influence of brain monoamine function on Stroop task performance in healthy participants using the established methods of acute dietary serotonin, dopamine, and combined monoamine depletion. The study was a double-blind placebo controlled design in which 12 healthy male participants completed the Stroop task under four acute treatment conditions: (a) balanced/placebo control, (b) acute tryptophan depletion, (c) acute tyrosine/phenylalanine depletion, and (d) acute tyrosine/phenylalanine/tryptophan depletion (combined monoamine depletion). Decreased Stroop interference indicating improved attentional control was observed after both tryptophan depletion and tyrosine/phenylalanine depletion, while there was no significant change in interference after combined monoamine depletion. Findings suggest that reduced tonic dopamine or serotonin activity within specific neural circuits (such as the striatum, anterior cingulate, or prefrontal cortex) may play a critical role in attentional control, possibly by improving gating of information via reducing noise in monoaminergic systems. These findings enhance our understanding of the neurochemical basis of attentional control and the possible cause of attentional control deficits in schizophrenia