This article outlines an experimental and numerical study on the pozzolanic interaction limits for carbonation of silica fume concretes. For this purpose cylinders of 8 types of High-Performance Concrete were cast. Carbonation and weight losses were studied parallel. An indirect method was used to measure carbonation; i.e. carbonation shrinkage was observed. The age of concrete at start of carbona

Vocal learning is a critical behavioral substrate for spoken human language. It is a rare trait found in three distantly related groups of birds-songbirds, hummingbirds, and parrots. These avian groups have remarkably similar systems of cerebral vocal nuclei for the control of learned vocalizations that are not found in their more closely related vocal non-learning relatives. These findings led to

The times when the chances that incremental optimisation of organisations could lead to sustained competitive advantage were great seem long gone. In today’s economy, organisations aspiring to reap any advantage at all will most likely be forced to master the reinvention of their business models on a regular basis – or better still, create new ones. The strategists and decision-makers who can comb

Tachykinins have been implied as mediators and/or modulators of capsaicin-sensitive primary afferents. It is known that tachykinins are released from central endings of capsaicin-sensitive primary afferent neurons in the rat and cat spinal cords, and that the capsaicin-sensitive bladder afferents are involved in regulating the micturition reflex in the rat. The general aim of the present studies w

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We analyze the clustering of scatterers in mobile radio channels, i.e, the fact that scatterers are usually not located uniformly in the whole coverage area, but tend to occur in clusters. While this has been recognized for some time, a realistic model for this phenomenon has been lacking up to now. We first analyze measurements to extract the distribution of the number of observed clusters. We th

Several studies have reported that spontaneous eye movements occur with visual imagery and that they closely reflect content and spatial relations from an original picture or scene (e.g., Brandt & Stark, 1997; Spivey & Geng, 2001; Johansson, Holsanova, & Holmqvist, 2006). Nevertheless, the exact purpose of these eye movements to “nothing” is elusive and has currently been the target of

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Popular Abstract in Swedish Grodyngels anpassning till livsmiljön - om betydelsen av, och samspelet mellan, arv och miljö Bakgrund Naturen är variabel och föränderlig. Inom en arts utbredningsområde kan miljöförhållandena variera rumsligt, och vad som är en lyckad strategi med avseende på t.ex. reproduktion eller predatorundvikande på en plats är inte nödvändigtvis den optimala strategin på en aAmphibian larvae are plastic in many traits. Can plasticity buffer population divergence, so that local adaptation is more common in non-plastic traits? I argue that this may be the case for adaptive plastic responses. Tadpoles of Rana arvalis are shown to alter their tail depth plastically as a response to predation risk; this is a truly adaptive response. Tail depths in the field (population and