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GMX901plus – upgradable GNSS SmartAntenna for cost effective monitoring of structural movements

first_imgLeica says its GMX901plus “is an affordable and rugged GNSS receiver that delivers precise and reliable data about movements of sensitive structures” such as pit walls. “For time-critical applications that require high rate data and a higher accuracy the GMX901plus can be smoothly upgraded to a powerful L1/L2 GPS/GLONASS receiver with an update rate of 5 Hz. Designed with a focus on the essential with low power consumption, high quality measurement, simplicity, and durability, the Leica GMX901plus is an ideal sensor for monitoring structural movements. It has a robust housing that is water, heat, cold and vibration resistant that can be easily mounted on the infrastructure for long term monitoring.”The basic GMX901plus is a L1 GPS receiver for cost sensitive projects. For monitoring projects that require a higher accuracy and high-rate data, the GMX901plus can be smoothly upgraded to a powerful L1/L2 GPS/GLONASS receiver with an update rate of 5 Hz. With this upgrade users take advantage of high accurate data and positions for a detailed deformation analysis to take the right decision when movements become critical.The GMX901plus connects seamlessly to the Leica GNSS Spider advanced GNSS processing software for coordinate calculation and raw data storage. The Leica GeoMoS monitoring software can be used to provide integration with other sensors, analysis of movements and calculation of limit checks. Third party analysis software can also be easily integrated via the standard NMEA interface of Leica GNSS Spider (RINEX).last_img read more

Energysaving technology to remove contaminants from waste water drinking water

first_imgA polymer mat developed at Rice University has the ability to fish biologically harmful contaminants from water through a strategy known as “bait, hook and destroy.” Tests with waste water showed the mat can efficiently remove targeted pollutants, in this case a pair of biologically harmful endocrine disruptors, using a fraction of the energy required by other technology. The technique can also be used to treat drinking water.The mat was developed by scientists with the Rice-led Nanotechnology-Enabled Water Treatment (NEWT) Center. The research is available online in the American Chemical Society journal Environmental Science and Technology.The Rice University-led NEWT Center created a nanoparticle-infused polymer mat that both attracts and destroys pollutants in wastewater or drinking water. A mat, top left, is immersed in water with methylene blue as a contaminant. The contaminant is then absorbed at top right by the mat and, in the bottom images, destroyed by exposure to light. The mat is then ready for reuse. (Credit: Rice University/NEWT)The mat depends on the ability of a common material, titanium dioxide, to capture pollutants and, upon exposure to light, degrade them through oxidation into harmless byproducts.Titanium dioxide is already used in some wastewater treatment systems. It is usually turned into a slurry, combined with waste water and exposed to ultraviolet light to destroy contaminants. The slurry must then be filtered from the water.The NEWT mat simplifies the process. The mat is made of spun polyvinyl fibres. The researchers made it highly porous by adding small plastic beads that were later dissolved with chemicals. The pores offer plenty of surface area for titanium oxide particles to inhabit and await their prey.The mat’s hydrophobic fibres naturally attract hydrophobic contaminants like the endocrine disruptors used in the tests. Once bound to the mat, exposure to light activates the photocatalytic titanium dioxide, which produces reactive oxygen species (ROS) that destroy the contaminants.last_img read more