For a successful application in spintronics of any material, a key problem is to get a reliable control of the electronic spin within it. An ideal candidate for this purpose would be any material which is non-magnetic in the bulk but has a tunable ferromagnetic surface layer with a large splitting of the spin-up and […]
Computer science • Mathematics • Mechanical Engineering • Robotics
One thing is designing an object in a computer, and another, quite different, is producing it as a real 3D object. All other things being equal, in general the more curves the designed object has, the more difficult it is to produce. Mathematics can be very helpful in this task. The geometric modeling of a […]
[Read Part 1 & Part 2] VIOLETA: You know the shape of the classical Italian coffee-pot, like the one Faustino has just braught. It consists of two truncated cones or pyramids, joined by their narrowest parts. I claim that the structure of the maps of values of a scientific discipline has a structure similar to […]
New crater spotted on Mars ranks among largest seen to date The Mars Reconnaissance Orbiter has observed a fresh crater on the Red Planet, NASA officials say. The space agency released an image that shows a hole gouged on the planet’s surface, made sometime between September 2016 and February of this year. Space.com Artificial islands […]
If a nucleus has a nonzero spin, it behaves as a small magnet. Therefore, in an external magnetic field, the nuclear magnetic moment vector precesses about the field direction but only certain otientations are allowed by quantum rules. Thus, for hydrogen (spin 1/2) there are two possible states in the presence of a field, each […]
Here, I summarize the discussion on the normative differences between nudges and boosts presented in Sims and Müller, 2019 . Behavioral Economics studies the systematic biases in economic decisions that occur because our cognitive processes are constrained and, thus, context-neutral optimization is impracticable. This area of research started with Tversky and Kahneman (1974) , and […]
[Read the first part here] LORENZO: Alright, Violeta, we may admit that the members of a scientific discipline may agree to assess the conjectures and models each of them is proposing according to some consensual rule, and we may also admit that this rule may be impartial , in the sense that it will often […]
Robotics, seals used to figure out reason for Antarctic sea ice holes Researchers used robotic floats and tagged elephant seals to learn why huge holes called polynyas are opening up in Antarctic ice. Strong storms and a higher salt content in the surface waters of the Southern Ocean are likely contributing to the formation of […]
The scattering of conduction electrons in metals owing to impurities with magnetic moments is known as the Kondo effect, after Jun Kondo, who analysed the phenomenon in 1964. This scattering increases the electrical resistance and has the consequence that, in contrast to ordinary metals, the resistance reaches a minimum as the temperature is lowered and […]
The Diagnostic and Statistical Manual of Mental Disorders, 5th edition (DSM-5) includes sensory alterations as one of the four characteristics of restricted / repetitive behavior of people with autism spectrum disorder (ASD). It defines this symptom characteristic as a «hyper- or hyporeactivity to sensory inputs or an unusual interest for sensory aspects of the environment» […]