A new brain imaging method pioneered by a German research group from several institutions can now produce images that localize the areas of the brain involved when test subjects perform physical activities, and can show how portions of the brain interact with each other. The technique, dubbed synchronization tomography, involves mapping the fluctuating magnetic fields produced by tiny electrical currents in the brain, and determining which brain regions are synchronized with an activity - such as a test subjects tapping finger. The researchers (Peter Tass, Institute of Medicine, Research Center, Juelich, email@example.com, 011+49-2461-61-2087) asked test subjects to tap their finger in time to a rhythmic tone, and to continue tapping at the same rate after the tone was switched off. Meanwhile, their brain activity was mapped with a magnetoencephalography (MEG) machine.
The maps showed that the same regions of the brain areas are active both as people tapped to a beat and as they paced the tapping themselves, but that the synchronization between the different brain areas changes dramatically. Other brain imaging methods, including functional magnetic resonance imaging (fMRI) and positron emission tomography (PET), can also provide insight into which regions of the brain are involved during various activities, but they take too long to acquire images to disclose how the brain regions interact with each other, and therefore overlook important details of brain function which are clearly revealed with synchronization tomography. In addition, a related synchronization technique may help in the study of rapidly changing signals in the heart detected with magnetocardiography systems. (P. A. Tass et al., Physical Review Letters, upcoming article; text at www.aip.org/physnews/select )
Phil Shewe | Bulletin of Physics News
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Friction stir welding is a still-young and thus often unfamiliar pressure welding process for joining flat components and semi-finished components made of light metals.
Scientists at the University of Stuttgart have now developed two new process variants that will considerably expand the areas of application for friction stir welding.
Technologie-Lizenz-Büro (TLB) GmbH supports the University of Stuttgart in patenting and marketing its innovations.
Friction stir welding is a still-young and thus often unfamiliar pressure welding process for joining flat components and semi-finished components made of...
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The Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP has been developing various applications for OLED microdisplays based on organic semiconductors. By integrating the capabilities of an image sensor directly into the microdisplay, eye movements can be recorded by the smart glasses and utilized for guidance and control functions, as one example. The new design will be debuted at Augmented World Expo Europe (AWE) in Berlin at Booth B25, October 18th – 19th.
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With the help of artificial intelligence, chemists from the University of Basel in Switzerland have computed the characteristics of about two million crystals made up of four chemical elements. The researchers were able to identify 90 previously unknown thermodynamically stable crystals that can be regarded as new materials. They report on their findings in the scientific journal Physical Review Letters.
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For the first time, Fraunhofer IKTS shows additively manufactured hardmetal tools at WorldPM 2016 in Hamburg. Mechanical, chemical as well as a high heat resistance and extreme hardness are required from tools that are used in mechanical and automotive engineering or in plastics and building materials industry. Researchers at the Fraunhofer Institute for Ceramic Technologies and Systems IKTS in Dresden managed the production of complex hardmetal tools via 3D printing in a quality that are in no way inferior to conventionally produced high-performance tools.
Fraunhofer IKTS counts decades of proven expertise in the development of hardmetals. To date, reliable cutting, drilling, pressing and stamping tools made of...
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