Street lighting in the UK could better cut crime, promote feelings of well-being and enhance sight for pedestrians, according to a report published today. By using the wrong type of lighting councils are missing an opportunity to reduce both the fear of crime and pedestrian accidents, and are spending more than they need to on powering street lamps.
The paper, published in Lighting, Research and Technology argues that while UK councils traditionally use orange sodium lamps for their street lighting, whiter lights of the same wattage tend to create an environment that is perceived to be brighter. This has not been examined before due to a misunderstanding in the way the eye perceives brightness when the surroundings are dark.
Dr Steve Fotios of Sheffield Hallam University, and leader of the study explains, “The eye uses two photoreceptors called rods and cones to see light and colour. The cones, the primary photoreceptor for daytime vision, are the underlying basis for conventional photometry - the measurement of brightness with a light meter. However, at night-time under street lighting the rods also contribute to vision, and since the spectral sensitivity of rods is different to that of the cones, measurements made using conventional photometry are likely to be flawed. When you take the rod response into account, white lights could be more effective at night-time than is suggested by the cone-based light meter.
Lorna Branton | alfa
Waste from paper and pulp industry supplies raw material for development of new redox flow batteries
12.10.2017 | Johannes Gutenberg-Universität Mainz
Low-cost battery from waste graphite
11.10.2017 | Empa - Eidgenössische Materialprüfungs- und Forschungsanstalt
University of Maryland researchers contribute to historic detection of gravitational waves and light created by event
On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...
Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.
Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....
Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).
When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...
Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.
How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...
Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.
It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...
17.10.2017 | Event News
10.10.2017 | Event News
10.10.2017 | Event News
20.10.2017 | Information Technology
20.10.2017 | Materials Sciences
20.10.2017 | Interdisciplinary Research