Lecture by Professor Oussama Khatib for Introduction to Robotics (CS223A) in the Stanford Computer Science Department.
Lecture 1 | introduction to robotics
In the first lecture of the quarter, Professor Khatib provides an overview of the course. CS223A is an introduction to robotics which covers topics such as Spatial Descriptions, Forward Kinematics, Inverse Kinematics, Jacobians, Dynamics, Motion Planning and Trajectory Generation, Position and Force Control, and Manipulator Design.
Hundreds of millions of years ago, at a time when back-boned animals were just starting to crawl onto land, one such creature became infected by a virus. It was a retrovirus, capable of smuggling its genes into the DNA of its host. And as sometimes happens, those genes stayed put. They were passed on to the animal’s children and grandchildren. And as these viral genes cascaded through the generations, they changed, transforming from mere stowaways into important parts of their host’s biology.
One such gene is called Arc. It’s active in neurons, and plays a vital role in the brain. A mouse that’s born without Arc can’t learn or form new long-term memories. If it finds some cheese in a maze, it will have completely forgotten the right route the next day. “They can’t seem to respond or adapt to changes in their environment,” says Jason Shepherd from the University of Utah, who has been studying Arc for years. “Arc is really key to transducing the information from those experiences into changes in the brain.”
WASHINGTON (Reuters) — Scientists using images from an orbiting NASA spacecraft have detected eight sites where huge ice deposits near the Martian surface are exposed on steep slopes, a potential source of water that could help sustain future human outposts.
While scientists already knew that about a third of the surface of Mars contains shallow ground ice and that its poles harbor major ice deposits, the research published on Thursday described thick underground ice sheets exposed along slopes up to 100 yards (meters) tall at the planet’s middle latitudes.
“It was surprising to find ice exposed at the surface at these places. In the mid-latitudes, it’s normally covered by a blanket of dust or regolith,” loose bits of rock atop a layer of bedrock, said research geologist Colin Dundas of the U.S. Geological Survey’s Astrogeology Science Center in Flagstaff, Arizona, who led the study.
Boeing unveils a squarish, skeletal quadcopter to try out new unmanned-delivery concepts.
Boeing’s newest prototype drone is a skeletal, squarish quadrotor built as a “flying test bed to mature the building blocks of autonomous technology for future applications,” the aircraft maker said in a statement.
Measuring 15 feet wide and 18 long, the Cargo Air Vehicle represents Boeing’s next step in its quest for next-generation vertical-takeoff-and-landing drones. Last year, the company acquired Aurora Flight Sciences, one year after the Virginia-based company established itself as one of the most interesting in the field by winning DARPAs VTOL X-Plane competition.
DISA director Lt. Gen. Alan Lynn talks about the tech he’s eyeing, some of which is barely out of the theoretical realm.
Tomorrow’s soldiers will wield encrypted devices that unlock to their voices, or even their particular way of walking, and communicate via ad-hoc, software-defined networks that use not radio waves but light according to Lt. Gen. Alan Lynn, who leads the Defense Information Systems Agency, the U.S. military’s IT provider. On Tuesday, Lynn talked about next-generation technologies that DISA is looking into, some of which are barely experimental today.
Here are few of the key areas:
The internet is ruled by a small number of massive corporations. Roger McNamee, Co-founder of Elevation Partners on CNBC, says, Google, Facebook, Amazon are increasingly just super-monopolies, especially Google … The share of the markets they operate in is literally on the same scale that Standard Oil had … more than 100 years ago—with the …
Jan. 10 (UPI) — By analyzing the unique rotation of FRB 121102, a fast radio burst discovered by Cornell astronomers, scientists have been able to study the nature of its cosmic origin.
While studying the giant pulse of radio waves, researchers realized the waves gyrate, or “twist and shout,” as they pass through a veil of magnetized plasma. The twists represent what’s called Faraday rotation, while the shouts describe the bursts.
By measuring these two phenomena, scientists can better understand the cosmic conditions that inspired the massive pulse of radio waves.
