On Friday, May 31, Anders Eklund, Department of Radiation Sciences, Medical Technology, Umeå University, Sweden, will defend his dissertation evaluating a new and simpler instrument for measuring the pressure of eye fluids, a key risk factor in glaucoma. Anders Eklund has a master’s in engineering and works at the Unit for Medical Technology and Informatics, Northern Sweden University Hospital. He has further developed and assessed a new type of sensor based on vibration technology. His work has targeted medical applications, above all measuring pressure in the eye and hardness in bodily tissue. High pressure in eye fluid is one of the prime risk factors in glaucoma. Intraocular pressure is routinely metered at eye clinics. The pressure is determined by flattening the cornea to make both the surface of the contact and the force of the contact measurable.
The dissertation presents a new and simpler method for measuring intraocular pressure: a system of sensors based on a piezo-electrically vibrating sensor element registers changes in the frequency of resonance, which is related to the contact surface. This resonance sensor is mounted on a force sensor, and when the instrument has been placed against the cornea, both the force and the surface of the contact are measured quickly and simultaneously; the eye pressure is determined on the basis of a coefficient between them. The results show that a simpler and quicker method of measuring pressure is possible thanks to this technique.
The capacity of this vibration sensor technique to measure contact surfaces has also been utilized in judging the hardness of prostate tissue removed by surgery. The study shows that the sensor can capture differences in hardness owing to the varying composition of different tissues. The composition and consistency of bodily tissues often change under disease conditions, such as cancer, and ultimately it should be possible to employ sensor technique to get an objective reading of tissue hardness, thereby improving diagnoses.
Hans Fällman | alphagalileo
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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...
Optical quantum computers can revolutionize computer technology. A team of researchers led by scientists from Münster University and KIT now succeeded in putting a quantum optical experimental set-up onto a chip. In doing so, they have met one of the requirements for making it possible to use photonic circuits for optical quantum computers.
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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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