However, certain works are carried out in conditions where levels can be lower with fatal consequences for persons. There fore it is, according to the scientists, a safety system, fruit of a collaboration agreement between the University of Granada and the Spanish Command for Training and Army Doctrine (MADOC), whose headquarter is in this city.
In order to improve the features and solve some of the disadvantages of the existing equipments, the scientists have carried out an instrument for oxygen measurement, as big as a mobile phone, easy to use and with a minimum maintenance costs. This way, it is possible to get to know the local concentration of such gas in every moment. This device is essential in those places where manufacturing, cleaning and maintenance works, such as ships, septic tanks, sewer systems, can be harmful for human health.
The definite prototype, patented by the UGR [http://www.ugr.es], is made up of a screen, where you can visualize data, and three buttons: screen lighting, another one to access the menu bar and the third one for measurement.
The system works automatically, and can be programmed to carry out measurements every minute or in ten-minute intervals. At the same time, the user can carry out measurements at any moment, without interfering in the previous proceeding. Anyway, the user will notice that the measurement has been done through a sound alarm. Equally, such signal will activate automatically if oxygen concentration in the environment is lower than 18%.
One of the advantages of this device against conventional ones is the auto-calibration option. According to the researchers, you just have to place the device outdoors in the ‘auto-calibration’ mode of the menu, to recalibrate the system in thirty seconds. On the other hand, according to scientists, as it is an optical instrument it does not receive electromagnetic interferences, and it is apt to be placed in industrial environments.
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A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
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In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
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The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
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The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.
Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...
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