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Washington University in St. Louis News & Information > University Groups > School of Engineering & Applied Science >
Mechanical, Aerospace, and Structural Engineering
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Kind of a drag
Engineer devises ways to improve gas mileage
March 16,
2009 --
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| Agarwal |
A mechanical engineer at Washington University in St. Louis is developing techniques that will lessen our monetary pain at the pump by reducing the drag of vehicles — planes, autos and trucks. Drag is an aerodynamic force that is the result of resistance a body encounters when it moves in a liquid or gaseous medium (such as air). Reduction in drag means less fuel would be required to overcome the fluid resistance encountered by the moving vehicle. Working with undergraduate and graduate students, Ramesh K. Agarwal, Ph.D, the William Palm Professor of Engineering at WUSTL, has successfully demonstrated that the drag of airplane wings and cars/trucks can be reduced by employing the active flow control technology.
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500-pound gorilla on the dais
Population growth puts dent in natural resources
Nov. 5,
2008 --
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| Criss |
It's a 500-pound gorilla that Robert Criss, Ph.D., professor of earth and planetary sciences in Arts & Sciences at Washington University in St. Louis, sees standing on the speaker's dais at political rallies, debates and campaigns. Its name is population growth. And sometime during President-elect Barack Obama's first several months in office, he will have to factor it into future environmental policy, says Criss."Population growth is driving all of our resource problems, including water and energy. The three are intertwined," Criss says. "The United States has over 305 million people of the 6.7 billion on the planet. We are dividing a finite resource pie among a growing number of people on Earth. We cannot expect to sustain exponential population growth matched by increased per capita use of water and energy. It's troubling. But politicians and religious leaders totally ignore the topic."
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500-pound gorilla on the dais
Population growth puts dent in natural resources
Oct. 7,
2008 --
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| Who can ignore this 500-pound gorilla? |
It's a 500-pound gorilla that Robert Criss, Ph.D., professor of earth and planetary sciences in Arts & Sciences at Washington University in St. Louis, sees standing on the speaker's dais at political rallies, debates and campaigns. Its name is population growth. "Population growth is driving all of our resource problems, including water and energy. The three are intertwined," Criss says. "The United States has over 305 million people of the 6.7 billion on the planet. We are dividing a finite resource pie among a growing number of people on Earth. We cannot expect to sustain exponential population growth matched by increased per capita use of water and energy. It's troubling. But politicians and religious leaders totally ignore the topic."
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Baseball diamond as playground of math and physics
Engineer: Head-first slide is quicker
Sept. 25,
2008 -- Whether watching the All-Star Game, a World Series game or just a regular-season Tuesday afternoon game, it's nearly guaranteed that fans will see daring slides, both feet-first and head-first, and even slides on bang-bang plays at first. Who gets there faster, the head-first slider or the feet-first? The head-first player, says David A. Peters, Ph.D., the McDonnell Douglas Professor of Engineering at Washington University in St. Louis, and big-time baseball fan. He says it's a matter of the player's center of gravity.
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Be prepared
Seminar to address ways to lessen earthquake damage
Aug. 11,
2008 --
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| What should the Midwest do before and after a major earthquake? |
The earthquake that hit the lower Midwest on April 18 of this year was a hearty 5.2 on the Richter scale and got the attention of the St. Louis region. What if a larger quake — occurring either in the New Madrid Fault or Wabash Valley Fault — were to hit the region? How would we respond? To address these concerns, the Department of Mechanical, Aerospace and Structural Engineering at Washington University in St. Louis is presenting a series of seminars and workshops on the topic of reducing the damage that could occur if a strong earthquake strikes the area again.
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Saving lives
Today's military using more robots
Aug. 4,
2008 --
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| WUSTL computer scientists who work on robots say the machines still need the human touch. |
War casualties are typically kept behind tightly closed doors, but one company keeps the mangled pieces of its first casualty on display. This is no ordinary soldier, though — it is Packbot from iRobot Corporation. Robots in the military are no longer the stuff of science fiction, and WUSTL's Doug Few and Bill Smart are on the cutting edge of this new wave of technology. Few and Smart report that the military goal is to have approximately 30% of the Army comprised of robotic forces by approximately 2020.
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Lefties have the edge
Baseball's southpaws play to their strength
July 7,
2008 --
Baseball diamonds are a left-hander's best friend. That's because the game was designed to make a lefty the "Natural," according to David A. Peters, Ph.D., the McDonnell Douglas Professor of Engineering at Washington University in St. Louis and über baseball fan. Peters is a mechanical engineer who specializes in aircraft and helicopter engineering and has a different approach to viewing America's Favorite Pastime.
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Antarctica's slip is showing
Data show Antarctic ice stream radiating seismically
June 4,
2008 --
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| Image courtesy of Doug Wiens |
| Douglas Wiens (left), and a colleague ready equipment to emplace seismographs in Antarctica during a 2001 expedition. |
A seismologist at Washington University in St. Louis along with colleagues at Pennsylvania State University and Newcastle University in the United Kingdom have found seismic signals from a giant river of ice in Antarctica that make California's earthquake problem seem trivial. Douglas A. Wiens, Ph.D., professor of earth and planetary sciences in Arts & Sciences, and colleagues combined seismological and global positioning system (GPS) analyses to reveal two bursts of seismic waves from an ice stream in Antarctica every day, each one equivalent to a magnitude seven earthquake.
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2008 McDonnell lecture
Space scientist Flanagan to speak on Webb Telescope
March 20,
2008 --
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| Flanagan |
Kathryn Flanagan, Ph.D., senior scientist and head of the James Webb Space Telescope (JWST) Mission Office at the Space Telescope Science Institute, will deliver the 2008 McDonnell Lecture at 7 p.m. Thursday, March 27, in Room 214 Wilson Hall on the Danforth Campus at Washington University in St. Louis.
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Missouri earthquake awareness month
Seminar to address ways to lessen earthquake damage
Feb. 6,
2008 -- The Department of Mechanical, Aerospace and Structural Engineering at Washington University in St. Louis is presenting a series of seminars and workshops on the topic of reducing the damage that would occur when a strong earthquake strikes the New Madrid fault area again.
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