637 research outputs found
Simon Grote. The Emergence of Modern Aesthetic Theory: Religion and Morality in Enlightenment Germany and Scotland
Review of: Simon Grote, The Emergence of Modern Aesthetic Theory: Religion and Morality in Enlightenment Germany and Scotland, Cambridge University Press, 2017
LIHYP - Linking Hydrogen Power Potentials in the North Sea Region
Vorstellung des LIHYP-Projektpiloten aus Oldenburg. Es ist geplant zwei E-Lastenräder mit integrierter Brennstoffzelle zu testen (in der Anwendung bei einem Logistikdienstleister aus Oldenburg und im Labor)
Identifying Visible Tissue in Intraoperative Ultrasound Images during Brain Surgery: A Method and Application
Intraoperative ultrasound scanning is a demanding visuotactile task. It
requires operators to simultaneously localise the ultrasound perspective and
manually perform slight adjustments to the pose of the probe, making sure not
to apply excessive force or breaking contact with the tissue, whilst also
characterising the visible tissue. In this paper, we propose a method for the
identification of the visible tissue, which enables the analysis of ultrasound
probe and tissue contact via the detection of acoustic shadow and construction
of confidence maps of the perceptual salience. Detailed validation with both in
vivo and phantom data is performed. First, we show that our technique is
capable of achieving state of the art acoustic shadow scan line classification
- with an average binary classification accuracy on unseen data of 0.87.
Second, we show that our framework for constructing confidence maps is able to
produce an ideal response to a probe's pose that is being oriented in and out
of optimality - achieving an average RMSE across five scans of 0.174. The
performance evaluation justifies the potential clinical value of the method
which can be used both to assist clinical training and optimise robot-assisted
ultrasound tissue scanning
Is resistance to ischaemia of motor axons in diabetic subjects due to membrane depolarization?
The reasons for the resistance to ischaemia of peripheral nerves in diabetics are not well understood. We have now explored whether axonal depolarization underlies this phenomenon, as has previously been proposed. Resistance to ischaemia was determined by the new method of “threshold tracking”. This method revealed an increase in excitability of the peroneal nerve at the popliteal fossa during ischaemia, and a decrease in excitability in the post-ischaemic period. The extent of these alterations in 28 type 1 diabetics without peripheral neuropathy showed a strong correlation with the mean blood glucose concentrations during the last 24 h before examination. To test whether the ischaemic resistance was related to membrane potential, we also measured axonal superexcitability in 11 selected diabetics, since it has been shown that post-spike changes in excitability depend on membrane potential. Changes in excitability of the peroneal nerve were measured in the period between 10 and 30 msec following a conditioning supramaximal compound action potential. Under resting conditions, no differences in the post-spike superexcitability were found between controls and diabetics, despite striking differences in their responses to a 10-min pressure cuff. These observations indicate that membrane depolarization is not involved in the resistance to ischaemia of motor axons in diabetic subjects
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