Argonne releases small modular reactor waste analysis report
Study one of the first to address nuclear waste production of small modular reactors.
Nov 18, 2022
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Energy & Green Tech
News tagged with surface area
Energy & Green Tech
Perovskite solar modules: High efficiency on a large surface area
From cell to module without loss of efficiency: This is one of the main challenges of perovskite photovoltaics. Researchers at Karlsruhe Institute of Technology (KIT) have now managed to produce perovskite solar modules with ...
May 7, 2021
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Energy & Green Tech
Floating solar farms could cool down lakes threatened by climate change
Solar power is now the cheapest source of electricity in history, according to a 2020 report by the International Energy Agency. But there's something holding this clean energy powerhouse back: space. Unlike fossil fuel power ...
Apr 13, 2021
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Telecom
Germany pumps 1 bn euros into 'embarrassing' mobile dead zones
German ministers agreed Monday to spend more than one billion euros plugging gaps in its mobile phone networks, whose patchy coverage has been blasted as "embarrassing" for the advanced industrial nation.
Nov 18, 2019
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Engineering
Artificial muscles are making drive systems small and sustainable
Wherever electric motors or electromagnets are too large or too heavy to be incorporated into a technical component, the novel drive mechanisms being developed by a research team led by Professors Stefan Seelecke and Paul ...
Apr 5, 2023
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Engineering
Not all of us have access to safe drinking water. This clever rainwater collector can change that
Access to clean drinking water is fundamental to our health and wellbeing, and a universal human right. But almost 200,000 Australians are still forced to use water contaminated with unsafe levels of various chemicals and ...
Aug 25, 2022
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Engineering
Human lung-inspired sensor monitors nitrogen dioxide in real-time
A research team has developed a human lung-inspired graphene-metal organic framework hybrid gas sensor, which can monitor extremely low concentrations of nitrogen dioxide at the level of one billionth in real-time. This study ...
Jul 6, 2023
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Machine learning & AI
Machine learning predicts blackouts caused by storms
Thunderstorms are common all over the world in summer. As well as spoiling afternoons in the park, lightning, rain and strong winds can damage power grids and cause electricity blackouts. It's easy to tell when a storm is ...
Jul 30, 2019
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Energy & Green Tech
As many rooftops as possible: Recommendations for an ambitious EU-wide solar mandate
The EU should phase in the solar mandate as swiftly as possible—from the end of 2024—for as many building types as possible, as well as for car parks. In addition, all member states should be required to create favorable ...
Oct 11, 2022
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Energy & Green Tech
Alternative to aviation fuel based on an oxygenated nanofluid
Aviation is a big user of fossil fuels and, as such, is a heavy producer of carbon emissions. Sustainability is high on the agenda. New work in the International Journal of Sustainable Aviation has reviewed the thermo-physical ...
Nov 7, 2022
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Surface area
Surface area is the measure of how much exposed area a solid object has, expressed in square units. Mathematical description of the surface area is considerably more involved then the definition of arc length of a curve. For polyhedra (objects with flat polygonal faces) the surface area is the sum of the areas of its faces. Smooth surfaces, such as a sphere, are assigned surface area using their representation as parametric surfaces. This definition of the surface area is based on methods of infinitesimal calculus and involves partial derivatives and double integration.
General definition of surface area was sought by Henri Lebesgue and Hermann Minkowski at the turn of the twentieth century. Their work led to the development of geometric measure theory which studies various notions of surface area for irregular objects of any dimension. An important example is the Minkowski content of a surface.
This text uses material from Wikipedia, licensed under CC BY-SA
