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All about Modelica: An equation-based language for modeling physical systems
Marco Bonvini’s personal website.
Topics /
Science & Space
The most popular blog posts about science & space on Hacker News. 4,455 posts.
1832
Visual explanations of mathematics (2020)
It is thought that Euclid wrote Elements in about 300 BC, but Oliver Byrne turned it into one of the true gems of visualization — and made it about 100 times more readable. By seamlessly combining typeset text (Caslon, if you’re interested) with minimalist geometric drawings in primary col
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China is mass-producing hypersonic missiles for $99,000
The Radical Asymmetry of Modern Warfare (P2)
1835
Covid and the Heart: It Spares No One – Johns Hopkins
New evidence suggests anyone infected with COVID is at higher risk for heart issues—a risk that persists even in relatively healthy people long after the illness has passed.
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Electric fields, not individual neurons, may hold information in memory: study
A new study suggests that electric fields may represent information held in working memory, allowing the brain to overcome “representational drift,” or the inconsistent participation of individual neurons
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No, SAR Can't See Through Buildings
Explore Capella blogs, case studies, and insights on SAR, space systems, and Earth intelligence.
1839
Very Wrong Math
The difference between misinformation and disinformation is the difference between ignorance and malice. Trolling is somewhat different, incorporating an element of provocation and narcissism. But what the hell is this?
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How do you power a rocket engine?
This article discusses different types of rocket engine cycles, from pressure-fed through gas generator, to full-flow staged combustion.
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Electrolysis can solve one of our biggest contamination problems
ETH Zurich researchers have developed a process that can be used on site to render environmental toxins such as DDT and lindane harmless and convert them into valuable chemicals – a breakthrough for the remediation of contaminated sites and a sustainable circular economy.
1844
Inside tiny tubes, water turns solid when it should be boiling
MIT team gets water to freeze solid at boiling temperature; finding could lead to new kinds of electronic devices with wires made of ice
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Can computers read through a book page by page without opening it?
A. R. Sanchez, B. Heshmat*, A. Aghasi, M. Zhang, S. Naqvi, J. Romberg, R. Raskar
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New laser ultrasound technique can remotely image the inside of a person
MIT researchers have produced the first “laser ultrasound” images in humans, using eye- and skin-safe lasers. The new technique enables noncontact ultrasound imaging, which may help clinicians to remotely assess patients, infants, and contact-sensitive subjects such as burn victims.
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Mathematical Patterns That Eventually Fail
Sometimes patterns can lead you astray. For example, it’s known that $latex \displaystyle{ \mathrm{li}(x) = \int_0^x \frac{dt}{\ln t} }$ is a good approximation to $latex \pi(x),$ the number …
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Planet Labs' open satellite feed
Benchmarks & Tips for Big Data, Hadoop, AWS, Google Cloud, PostgreSQL, Spark, Python & More...
1850
Seven Dyson Sphere Candidates
A sufficiently advanced technology is indistinguishable from natural phenomena when enough stars are examined!
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Science upside for Starship
This blog is a direct follow up of Starship Is Still Not Understood, and is part of the series on popular misconceptions in space journalism. Now available in audio form. I think it is relatively s…
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Emotion concepts and their function in a large language model
All modern language models sometimes act like they have emotions. What’s behind these behaviors? Our interpretability team investigates.
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Chronic alcohol use reshapes the brain’s immune landscape
In their quest to understand how the immune system is implicated in alcohol use disorder, Scripps Research scientists have found a potential path for treatment.
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How the US Air Force Ditched the Average and Saved Lives
The average is a myth. Understand the pitfalls of the average and how it can conceal useful information. How the US Air Force threw out the average and saved lives. Use distributions to better understand your data.
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Warp Drive News
Science News, Physics, Science, Philosophy, Philosophy of Science
1859
A lesser known mechanism for alcohol tolerance
People who drink a lot of alcohol have a high alcohol tolerance. By this, I mean two things:
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DARPA wants to bypass the thermal middleman in nuclear power systems
Nuclear power already has an energy density advantage over other sources of thermal electricity generation. But what if nuclear generation didn’t require a steam turbine? What if the radiation from a reactor was less a problem to be managed and more a source of energy? And what if an energy conversion technology could…