CU News
News from the University of Colorado in Boulder.
CU report: Colorado economy to stay warm next year
Dec 11th
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Solar eruption could be like an attack on the Earth
Dec 9th
points up need for society to prepare
A massive ejection of material from the sun initially traveling at over 7 million miles per hour that narrowly missed Earth last year is an event solar scientists hope will open the eyes of policymakers regarding the impacts and mitigation of severe space weather, says a University of Colorado Boulder professor.
The coronal mass ejection, or CME, event was likely more powerful than the famous Carrington storm of 1859, when the sun blasted Earth’s atmosphere hard enough twice to light up the sky from the North Pole to Central America and allowed New Englanders to read their newspapers at night by aurora light, said CU-Boulder Professor Daniel Baker. Had it hit Earth, the July 2012 event likely would have created a technological disaster by short-circuiting satellites, power grids, ground communication equipment and even threatening the health of astronauts and aircraft crews, he said.
CMEs are part of solar storms and can send billions of tons of solar particles in the form of gas bubbles and magnetic fields off the sun’s surface and into space. The storm events essentially peel Earth’s magnetic field like an onion, allowing energetic solar wind particles to stream down the field lines to hit the atmosphere over the poles.
Fortunately, the 2012 solar explosion occurred on the far side of the rotating sun just a week after that area was pointed toward Earth, said Baker, a solar scientist and the director of CU-Boulder’s Laboratory for Atmospheric and Space Physics. But NASA’s STEREO-A, satellite that was flying ahead of the Earth as the planet orbited the sun, captured the event, including the intensity of the solar wind, the interplanetary magnetic field and a rain of solar energetic particles into space.
“My space weather colleagues believe that until we have an event that slams Earth and causes complete mayhem, policymakers are not going to pay attention,” he said. “The message we are trying to convey is that we made direct measurements of the 2012 event and saw the full consequences without going through a direct hit on our planet.”
Baker will give a presentation on the subject at the 46th Annual Fall Meeting of the American Geophysical Union held in San Francisco Dec. 9 to Dec. 13.
While typical coronal mass ejections from the sun take two or three days to reach Earth, the 2012 event traveled from the sun’s surface to Earth in just 18 hours. “The speed of this event was as fast or faster than anything that has been seen in the modern space age,” said Baker. The event not only had the most powerful CME ever recorded, but it would have triggered one of the strongest geomagnetic storms and the highest density of particle fluctuation ever seen in a typical solar cycle, which last roughly 11 years.
“We have proposed that the 2012 event be adopted as the best estimate of the worst case space weather scenario,” said Baker, who chaired a 2008 National Research Council committee that produced a report titled Severe Space Weather Events – Understanding Societal and Economic Impacts. “We argue that this extreme event should be immediately employed by the space weather community to model severe space weather effects on technological systems such as the electrical power grid.
“I liken it to war games — since we have the information about the event, let’s play it through our various models and see what happens,” Baker said. “If we do this, we would be a significant step closer to providing policymakers with real-world, concrete kinds of information that can be used to explore what would happen to various technologies on Earth and in orbit rather than waiting to be clobbered by a direct hit.”
Even though it occurred about 150 years ago, the Carrington storm was memorable from a natural beauty standpoint as well as its technological impacts, he said. The event disrupted telegraph communications — the Internet of the Victorian Age — around the world, sparking fires at telegraph offices that caused several deaths, he said.
A 1989 geomagnetic storm caused by a CME from a solar storm in March 1989 resulted in the collapse of Hydro-Quebec’s electricity transmission system, causing 6 million people to lose power for at least nine hours, said Baker. The auroras from the event could be seen as far south as Texas and Florida.
“The Carrington storm and the 2012 event show that extreme space weather events can happen even during a modest solar cycle like the one presently underway,” said Baker. “Rather than wait and pick up the pieces, we ought to take lessons from these events to prepare ourselves for inevitable future solar storms.”
CU media release.
CU: Build your own 3-D video game
Dec 5th
you build a video game, learn to code
In just one hour, school kids, teachers and any code-curious member of the public with an Internet connection can now create their own 3-D video game using a tutorial built by a team at the University of Colorado Boulder in preparation for the global “Hour of Code” event happening the second week of December.
CU-Boulder’s game-building program allows people with zero experience coding to design their own 3-D worlds by “inflating” hand-drawn 2-D icons and then programming those objects to interact in defined ways. For example, a participant could easily create a 3-D version of the classic arcade game Frogger by inflating a frog and then writing a line of code that would tell the program to squash the frog if it collides with a truck that has also been programmed to move horizontally across the screen at a set speed.
CU-Boulder’s online game-building tool is among a variety of self-guided tutorials that have been created for the Hour of Code, an event that aims to recruit 10 million schoolchildren to spend one hour during the week of Dec. 9-15, dubbed Computer Science Education Week, learning the basics of coding. The event, spearheaded by the nonprofit code.org, is designed to spark excitement about coding among youth in order to bolster a future interest in computer science, a field that’s increasingly important to a wide range of careers as well as everyday life.
“Programming should be easy and exciting,” said CU-Boulder computer science Professor Alexander Repenning, who led the project. “But that’s not where we are. The perception of the public is that it’s hard and boring. Our goal is to expose a much larger as well as broader audience to programming by reinventing computer science education in public schools.”
CU-Boulder’s Hour of Code tutorial—which can be found at http://hourofcode.com/ac—builds on two decades of Repenning’s research, which has pioneered drag-and-drop programming tools for kids called AgentSheets and AgentCubes. Repenning and his team also have developed Scalable Game Design, a curriculum teachers can implement to help their students use AgentSheets and AgentCubes to learn computer science through building their own video games.
Students can use the same tools and their new computational thinking skills to build science simulations—the coding needed to lay out what should happen when a truck collides with a frog is not that different from the coding needed to outline the chemical reaction that occurs when two molecules collide, for example.
The Scalable Game Design project recently received a $2 million grant from the National Science Foundation to continue to expand nationally.
From the beginning, the purpose of Scalable Game Design was to give school kids a taste of coding that might be able to flip the often-held belief that computer programming was not something they wanted to learn.
Repenning and his team began to reach out to kids in the local Boulder Valley School District, offering video game-building workshops as an after-school activity. The participants loved it, but the kids who initially showed up were the usual suspects—boys. In subsequent years, the project was introduced into classes that were already being taught during the school day, exposing all kinds of kids who might not normally be inclined to try computer programming, especially girls and minority students, to code.
“We asked them after, ‘Did you enjoy the activity?’ And they said, ‘Yeah. We love it and we want to do more of it,’ ” Repenning said.
The program is now ubiquitous in Boulder-area middle schools, and beginning about five years ago, Repenning received a $1.5 million grant from NSF to expand the program to schools outside the local district, especially districts with widely varying demographics, from inner-city schools to extremely rural schools and Native American communities. To implement the expansion, CU-Boulder hosted trainings on campus each summer to prepare teachers to deliver the program.
During the first expansion, Repenning and his colleagues also discovered that the way the video-game curriculum was taught impacted the degree to which girls, who are vastly underrepresented in computer science, were interested in coding. Direct instruction appeared to turn girls off, while inquiry-based approaches got the girls as excited as the boys.
Repenning has since received two more NSF grants. The first, for $1.5 million, is being used to follow up on how pedagogy affects girls studying computer science. The second and most recent grant—$2 million awarded in August—recognizes the achievements of the initial expansion effort and is being used to further spread Scalable Game Design across the country.
After the initial expansion, the Scalable Game Design team measured the success of the program by gauging the interest students had in learning more about computer science after they finished designing a video game and by analyzing the games themselves to see if the design of the games demonstrated a grasp of coding concepts. With positive results in both categories, NSF gave the team a green light to further expand the program by offering some teacher-training programs online.
The Hour of Code tutorial built on the Scalable Game Design infrastructure now allows anyone who is interested to get a taste of video game programming. More information on the Hour of Code can be found at http://csedweek.org/. Anyone interested in participating in the Hour of Code or using CU-Boulder’s Hour of Code program in their classes can find information athttp://hourofcode.com/ac.
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