Air Quality Station v0.9 on a Breadboard
Measuring & plotting : °C, %rel.H, Pa, NO₂, C₂H₅CH, CO, CO₂, VOC, PM1, PM2, PM4, PM10 also: Count Particles of Sizes: 0.5, 1, 2.5, 4 & 10µm
See https://wiki.seeedstudio.com/Sensor_gas/ for gas sensors
Der Energieticker NÖ zeigt live die Energieerzeugung aus erneuerbaren Energien im Vergleich zum Stromverbrauch in Niederösterreich. Man sieht, zu welchen Zeiten NÖ mehr erneuerbaren Strom erzeugt, als im Land verbraucht wird.
A number of circuit which can be simulated in the browser. I believe that it uses JavaScript, not Java.
Many other physics-related simulations can be found on https://www.falstad.com/mathphysics.html
The Theoretical Physics Reference is an attempt to derive all theoretical physics equations (that are ever needed for applications) from the general and special relativity and the standard model of particle physics.
The goals are:
All calculations are very explicit, with no intermediate steps left out.
Start from the most general (and correct) physical theories (general relativity or standard model) and derive the specialized equations from them (e.g. the Schrödinger equation).
Math is developed in the math section (not in the physics section).
Theory should be presented as short and as explicitly as possible. Then there should be arbitrary number of examples, to show how the theory is used.
There should be just one notation used throughout the book.
It should serve as a reference to any physics equation (exact derivation where it comes from) and the reader should be able to understand how things work from this book, and be ready to understand specialized literature.
GMAT is designed to model, optimize, and estimate spacecraft trajectories in flight regimes ranging from low Earth orbit to lunar applications, interplanetary trajectories, and other deep space missions. Analysts model space missions in GMAT by first creating resources such as spacecraft, propagators, estimators, and optimizers.
Abstract: The Breakthrough Starshot project proposes using radiation-pressure propulsion to send multiple spacecraft in the gram-range mass to interstellar targets. There are numerous engineering challenges to accomplishing this mission, but their project discusses speeds and accelerations previously only discussed for cannon projectiles and particle physics experiments. This article examines the problem from first principles to see if the project is even orders-of-magnitude possible. A preliminary check on their numbers seems to confirm that the project is possible in principle. https://stkwans.blogspot.com/2012/04/program-66.html is about the Apollo guidance computer. https://stkwans.blogspot.com/2012/09/a-review-of-adxl345-and-bma180.html
Skyfield computes positions for the stars, planets, and satellites in orbit around the Earth. Its results should agree with the positions generated by the United States Naval Observatory and their Astronomical Almanac to within 0.0005 arcseconds (which equals half a “mas” or milliarcsecond).
Written in pure Python and installs without any compilation.
Supports Python 2.6–2.7 and Python 3.3–3.5.
Has NumPy as its only binary dependency, the fundamental package for scientific computing with Python, whose vector operations make Skyfield efficient.