The tethered balloon, which is located in the Parc Andre Citroën, in Paris’s 15th arrondissement, uses an innovative lighting system to provide real-time reports on atmospheric pollution.
The balloon displays the quantity of the three most harmful contaminants (nitrogen dioxide, ozone and particles) found in the atmosphere, using an easy-to-understand colour coding – red for highly polluted air, orange for polluted, yellow for moderate, light green for clean and green for very clean.
In Paris, data is collected at several spots throughout the city by sensors set up by Airparif, an organisation monitoring French air quality. The data used complies with the new European Union air-pollution index developed for the CITEAIR project, which is currently used by about 30 large cities.
The balloon displays two measurements of air quality using Airparif’s data. Firstly, the ambient air quality is indicated by the colour of the balloon, using three projectors that are located upon the envelope’s equatorial plane, providing good night-time visibility. Secondly, air quality near major traffic junctions is indicated using a high-power rotating laser beam that sweeps the lower half of the envelope.
The Paris Aérophile balloon is filled with 6,000 cubic metres of helium and is tethered to the ground with a movable cable controlled by a hydroelectric winch. The environmentally friendly design is based on the Archimedes principle, and can lift up to 30 passengers (about 2.5 tonnes), without any noise or shaking, to an altitude of 150 metres above the city.
Robotic fish to replace animal testing
17.06.2019 | Otto-von-Guericke-Universität Magdeburg
Marine oil snow
12.06.2019 | University of Delaware
From June 25th to 27th 2019, the Fraunhofer Institute for Digital Media Technology IDMT in Ilmenau (Germany) will be presenting a new solution for acoustic quality inspection allowing contact-free, non-destructive testing of manufactured parts and components. The method which has reached Technology Readiness Level 6 already, is currently being successfully tested in practical use together with a number of industrial partners.
Reducing machine downtime, manufacturing defects, and excessive scrap
The quality of additively manufactured components depends not only on the manufacturing process, but also on the inline process control. The process control ensures a reliable coating process because it detects deviations from the target geometry immediately. At LASER World of PHOTONICS 2019, the Fraunhofer Institute for Laser Technology ILT will be demonstrating how well bi-directional sensor technology can already be used for Laser Material Deposition (LMD) in combination with commercial optics at booth A2.431.
Fraunhofer ILT has been developing optical sensor technology specifically for production measurement technology for around 10 years. In particular, its »bd-1«...
The well-known representation of chemical elements is just one example of how objects can be arranged and classified
The periodic table of elements that most chemistry books depict is only one special case. This tabular overview of the chemical elements, which goes back to...
Light can be used not only to measure materials’ properties, but also to change them. Especially interesting are those cases in which the function of a material can be modified, such as its ability to conduct electricity or to store information in its magnetic state. A team led by Andrea Cavalleri from the Max Planck Institute for the Structure and Dynamics of Matter in Hamburg used terahertz frequency light pulses to transform a non-ferroelectric material into a ferroelectric one.
Ferroelectricity is a state in which the constituent lattice “looks” in one specific direction, forming a macroscopic electrical polarisation. The ability to...
Researchers at TU Graz calculate the most accurate gravity field determination of the Earth using 1.16 billion satellite measurements. This yields valuable knowledge for climate research.
The Earth’s gravity fluctuates from place to place. Geodesists use this phenomenon to observe geodynamic and climatological processes. Using...
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