Here is a wordy topic which also happens to be rich with
physics and foundational in almost every aspect of engineering. The 2nd law of thermodynamics states that,
you cannot build a device capable of extracting heat from something to do work
without having some residual useless heat output. Perhaps more simply stated, you cannot
convert a given amount of heat energy into exactly the same amount of
work. There will always be some
frictional type losses that re
When we catch balls, Jeff Hawkins, cofounder of Numenta and author of “On Intelligence,” tells us we aren’t solving differential equations. A robot, on the other hand, does solve differential equations, requiring roughly 3-trillion calculations for a 1s toss (“Kinematically Optimal Catching a Flying Ball with a Hand-Arm-System,” Berthold Bauml, Thomas Wimbock and Gerd Hirzinger, Institute of Robotics and Mechatronics, 2010).
DuPont Pioneer, the seed company that sells corn, sorghum, alfalfa, etc. and was considering expanding Kaua'i operations just a few years ago, has decided instead to close its Parent seed operations there. Like with astronomy, seed operations have been in Hawaii since the 1960s without issue.
oogle Maps searches for the words "Nigger House" will bring up a map pin pointing the white house and the underground railroad museum in Chicago. Searches for racial and ethnic slurs on other groups produce MORE questionable results. In fact the most targeted group is your generic "white" American.Google says sorry over racist Google Maps White House search results. Searches using a racist slur return results pinpointing the White House in Washington DC
An open letter to the office of the president of Boston University
Burton Richter, 1975 Nobel prize in Physics for the discovery of the J/ψ meson, speaks about the need of a new linear collider for the measurement of Higgs boson branching fractions in a video on Facebook (as soon as I understand how to paste here I will!)
Richter has been a fervent advocate of electron-positron machines over hadronic accelerators throughout his life. So you really could not expect anything different from him - but he still does it with all his might. At one point he says, talking of the hadron collider scientists who discovered the Higgs boson:
Learning styles-based education (LSBEd) places the child as the center of education. Learning Styles-Based Education uses an enhanced instructional design (FIER Instructional design) that includes the 5-step, 5-cycle model of teaching. It follows the learning styles model as a basis in the formulation of objectives, outcomes, activities, and assessment.
Today is the seventy-fifth anniversary of one of the most famous speeches given by Winston Churchill:
of which the best remembered words areWe shall fight on the beaches, we shall fight on the landing grounds, we shall fight in the fields and in the streets, we shall fight in the hills; we shall never surrender
There is nothing like these RPN (Reverse Polish Notation) calculators from HP. But there seems to be two kinds of people: those who love RPN and those who just find it confusing.
I happen to be in the first category and these are my RPN calculators:
“There are 10^11 stars in the galaxy. That used to be a huge number. But it's only a hundred billion. It's less than the national deficit! We used to call them astronomical numbers. Now we should call them economical numbers.”
Richard Feynman, who would turn 97 years old today. Happy birthday, mr. Feynman!