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New
The latest blog posts to take off on Hacker News. 4,455 posts.
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Archaeologists discover oldest wooden structure
Archaeologists discover world’s oldest wooden structure
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Circles do not exist
Many logos, drawings and other graphical designs have the following shape in it. What is this shape? If you thought: "Ah-ha! I'm smart and r...
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“Inverse vaccine” shows potential to treat MS and other autoimmune diseases
A new type of vaccine developed by researchers at the University of Chicago’s Pritzker School of Molecular Engineering (PME) has shown in the lab setting that
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A mathematical formalization of dimensional analysis (2012)
Mathematicians study a variety of different mathematical structures, but perhaps the structures that are most commonly associated with mathematics are the number systems, such as the integers $late…
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Can I take ducks home from the park?
16 queries and 6 language models
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Public exposure to BPA exceeds acceptable health safety levels
Population exposure to the synthetic chemical Bisphenol A (BPA), which is used in everything from plastic and metal food containers to reusable water bottles and drinking water pipes in Europe is well above acceptable health safety levels, according to updated research data. This poses a potential health risk to…
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Bacteria generate electricity from wastewater
In a breakthrough for the field of bioelectronics, researchers at EPFL have enhanced the ability of E. coli bacteria to generate electricity. The innovative approach offers a sustainable solution for organic waste processing while outperforming previous state-of-the-art technologies, opening new horizons for versatile…
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Solar
I spent some time (in Fall 2023) reading about solar deployment. Some facts that struck me:
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What Is Dimensional Analysis?
Mathematics is famously concerned with numbers . However, most of the physical quantities that we encounter in everyday experience cannot be expressed as numbers alone.
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A CD Spectrometer (2006)
A simple spectrometer can be built from a CD and a box. Cut a slit on one side of the box. Place the CD on the other side with about 60 degree angle. Look down into the openning on the box. The slit should not be too wide, otherwise the spectrum lines will be blurred. It should not be too narrow either, otherwise the…
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New world record with an electric racing car: From 0 to 100 in 0.956 seconds
Students from ETH Zurich and Lucerne University of Applied Sciences and Arts have broken the previous world record for acceleration with their hand-built electric racing car, mythen. The vehicle accelerated from zero to 100 km/h in 0.956 seconds over a distance of 12.3 metres.
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The Relativity of Wrong (1989)
I received a letter from a reader the other day. It was handwritten in crabbed penmanship so that it was very difficult to read. Nevertheless, I tried to make it out just in case it might prove to be important.
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How large is that number in the Law of Large Numbers?
All large numbers are large, but some are larger than others
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Sony develops energy harvesting module from electromagnetic wave noise
Sony Semiconductor Solutions Group develops device business which includes Micro display, LSIs, and Semiconductor Laser, in focusing on Image Sensor.
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Arxiv.org is experiencing a DDoS attack
arXiv users may be experiencing email disruption due to a DDOS attack. Over the past few days, a small number of users issued over a million email change…
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Blood pressure should be measured lying down: study
Research Highlights: An analysis of data from a long-running study of more than 11,000 adults from four diverse communities in the United States has found that adults who had high blood pressure while both seated upright and lying supine (flat on ...
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WiFi can read through walls
UCSB researchers’ new method enables high-quality imaging of still objects with WiFi by using the Geometrical Theory of Diffraction and the corresponding Keller cones to trace edges of the objects.
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Bees struggle to find flowers because of air pollution
A new study has found that air pollution is preventing pollinators finding flowers because it degrades the scent.
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What is an emotion? William James’s theory of how our bodies affect our feelings
“A purely disembodied human emotion is a nonentity.”
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Bit by bit microplastics from tyres are polluting our waterways
Particles from tyre wear were found to be the most prevalent microplastic in urban stormwater
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Device offers long-distance, low-power underwater communication
A new underwater communication and networking technique can achieve kilometer-scale ranges while consuming about one-millionth the power required by current communication methods.
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Chemists develop new way to split water
The news portal offers current information about studies, research and life at Münster University.
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Farms that create habitat key to food security and biodiversity
Diversified farming is an important complement to forest protections for reversing tropical biodiversity declines.
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Extreme El Niño weather switched off South American's carbon sink
Tropical forests in South America lose their ability to absorb carbon from the atmosphere when conditions become exceptionally hot and dry, according to new research.