These are organized by a classification scheme developed exclusively for Cosma. More…
Fundamental Physical Constants (Institute for Chemistry and Biochemistry)
Physics, Constants, Units, & Uncertainty (NIST)
CODATA Internationally recommended values of the Fundamental Physical Constants (NIST)
CODATA Internationally recommended values of the Fundamental Physical Constants, Universal (NIST)
Physics Fundamentals (Martindale’s Reference Desk)
Physical constant, sometimes called fundamental physical constant or universal constant, is a physical quantity that is generally believed to be both universal in nature and have constant value in time. It is contrasted with a mathematical constant, which has a fixed numerical value, but does not directly involve any physical measurement.
There are many physical constants in science, some of the most widely recognized being the speed of light in vacuum c, the gravitational constant G, Planck’s constant h, the electric constant ε0, and the elementary charge e. Physical constants can take many dimensional forms: the speed-of-light signifies a maximum speed for any object and is expressed dimensionally as length divided by time; while the fine-structure constant α, which characterizes the strength of the electromagnetic interaction, is dimensionless. — Wikipedia
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In small groups, people follow high-performing...
on February 21, 2019 at 7:48 pm
While the "wisdom of the crowd" shapes the behavior of large groups of people, less is known about small-group dynamics and how individuals interact to make decisions, particularly when it comes to the emergence of leaders, a key area of inquiry in organizational research. The phenomenon is critical to arriving at an understanding of social networks of all kinds. […]
Quantum dots can spit out clone-like photons
on February 21, 2019 at 7:00 pm
In the global quest to develop practical computing and communications devices based on the principles of quantum physics, one potentially useful component has proved elusive: a source of individual particles of light with perfectly constant, predictable, and steady characteristics. Now, researchers at MIT and in Switzerland say they have made major steps toward such a single photon source. […]
Skateboarding defies the neoliberal logic of the...
on February 20, 2019 at 4:13 pm
Skateboarding today is a global phenomenon, with around 50m riders and thousands of skate parks worldwide – it will even feature as a sport in the 2020 Olympic Games. From the full on testosterone of Thrasher skateboard magazine to the fashionable styling of Vogue, the skater girls and boys of Kabul to the Native American reservations of South Dakota, the skate parks of Brazil to the streets of Shenzhen, skateboarding is no longer just for punkish, subcultural rebels – it's […]
Big data is being reshaped thanks to 100-year-old...
on February 20, 2019 at 3:46 pm
Your brain is made up of billions of neurons connected by trillions of synapses. And how they're arranged gives rise to the brain's functionality and to your personality. That's why scientists in Switzerland recently produced the first-ever digital 3-D brain cell atlas, a complete mapping of the brain of a mouse. While this is a colossal achievement, the great challenge now lies in learning to decipher the atlas. And it's a huge one. […]
Gravitational waves will settle cosmic conundrum
on February 14, 2019 at 4:00 pm
Measurements of gravitational waves from approximately 50 binary neutron stars over the next decade will definitively resolve an intense debate about how quickly our universe is expanding, according to findings from an international team that includes University College London (UCL) and Flatiron Institute cosmologists. […]