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Popular Science: A New Interface For Bionic Limbs

Light bridges the communication gap between man and machine

The monthly science magazine Popular Science covered the research of SMU engineers Marc Christensen and Volkan Otugen who are working to develop technology that will someday help amputees have “feeling” in their artificial limbs.

The research is funded through a $5.6 million grant from the U.S. Department of Defense and industry for a center led by SMU’s Lyle School of Engineering. The goal is to develop revolutionary technology for advanced prosthetic limbs that will help amputees returning from war in Iraq and Afghanistan.

Two-way fiber optic communication between prosthetic limbs and peripheral nerves will be key to operating realistic robotic arms, legs and hands that not only move like the real thing, but also “feel” sensations like pressure and heat.

Popular Science’s coverage is in the March issue: “Talk to the hand: A new interface for bionic limbs.”

Read the full story.

EXCERPT:

By Morgen Peck
Popular Science

The Six Million Dollar Man’s robotic arm worked as seamlessly as his natural one. But in the real world, robotic limbs have limited motions and the user can’t feel what he or she is “touching.” a new approach using optical fibers implanted around nerves could transmit more data and let prosthetics speak to the brain.

Previously, scientists surgically connected electrodes to the nervous system, but they seemed to harm the body’s tissues, making the implant fail within months. In 2005, scientists discovered that they could stimulate a neuron to send a message by shining infrared light on it. Last September, DARPA, the Pentagon’s R&D branch, awarded $4 million to a project led by Southern Methodist University engineers to attempt to connect nerves to artificial limbs using fiber optics.

The team suspects that flexible glass or polymer fiber optics will be more flesh-friendly than rigid electrodes. In addition, optical fibers transmit several signals at once, carrying 10 times as much data as their electrical counterparts. “Our goal is to do for neural interfaces what fiber optics did for the telecom industry,” says electrical engineer Marc Christensen, who is leading the SMU group. Transmitting more information faster should give bionic limbs more lifelike movements.

Talk to the hand: A new interface for bionic limbs.

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3D digital download of giant Glen Rose dinosaur track is roadmap for saving at-risk natural history resources

Paleontologists propose the new term “digitype” for full-resolution three-dimensional digital models that preserve and archive endangered fossils

Portable laser scanning technology allows researchers to tote their latest fossil discovery from the field to the lab in the form of lightweight digital data stored on a laptop. But sharing that data as a 3D model with others requires standard formats that are currently lacking, say paleontologists at Southern Methodist University.

The SMU researchers used portable laser scanning technology to capture field data of a huge 110 million-year-old Texas dinosaur track and then create to scale an exact 3D facsimile. They share their protocol and findings with the public — as well as their downloadable 145-megabyte model — in the online scientific journal Palaeontologia Electronica.

The model duplicates an actual dinosaur footprint fossil that is slowly being destroyed by weathering because it’s on permanent outdoor display, says SMU paleontologist Thomas L. Adams, lead author of the scientific article. The researchers describe in the paper how they created the digital model and discuss the implications for digital archiving and preservation. Click here for the download link.

“This paper demonstrates the feasibility of using portable 3D laser scanners to capture field data and create high-resolution, interactive 3D models of at-risk natural history resources,” write the authors.

“3D digitizing technology provides a high-fidelity, low-cost means of producing facsimiles that can be used in a variety of ways,” they say, adding that the data can be stored in online museums for distribution to researchers, educators and the public.

SMU paleontologist Louis L. Jacobs is one of the coauthors on the article.

“The protocol for distance scanning presented in this paper is a roadmap for establishing a virtual museum of fossil specimens from inaccessible corners across the globe,” Jacobs said.

Paleontologists propose the term “digitype” for digital models
Scientists increasingly are using computed tomography and 3D laser scanners to produce high-quality 3D digital models, say Adams and his colleagues, including to capture high-resolution images from remote field sites.

SMU’s full-resolution, three-dimensional digital model of the 24-by-16-inch Texas footprint is one of the first to archive an at-risk fossil, they say.

Book a live interview

To book a live or taped interview with Thomas Adams in the SMU News Broadcast Studio call News and Communications at 214-768-7650 or email news@smu.edu.

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The SMU paleontologists propose the term “digitype” for such facsimiles, writing in their article “High Resolution Three-Dimensional Laser-scanning of the type specimen of Eubrontes (?) Glenrosensis Shuler, 1935, from the Comanchean (Lower Cretaeous) of Texas: Implications for digital archiving and preservation.”

Laser scanning is superior to other methods commonly used to create a model because the procedure is noninvasive and doesn’t harm the original fossil, the authors say. Traditional molding and casting procedures, such as rubber or silicon molds, can damage specimens.

But the paleontologists call for development of standard formats to help ensure data accessibility.

“Currently there is no single 3D format that is universally portable and accepted by all software manufacturers and researchers,” the authors write.

Digitype is baseline for measuring future deterioration
SMU’s digital model archives a fossil that is significant within the scientific world as a type specimen — one in which the original fossil description is used to identify future specimens. The fossil also has cultural importance in Texas. The track is a favorite from well-known fossil-rich Dinosaur Valley State Park, where the iconic footprint draws tourists.

The footprint was left by a large three-toed, bipedal, meat-eating dinosaur, most likely the theropod Acrocanthosaurus. The dinosaur probably left the footprint as it walked the shoreline of an ancient shallow sea that once immersed Texas, Adams said. The track was described and named in 1935 as Eubrontes (?) glenrosensis. Tracks are named separately from the dinosaur thought to have made them, he explained.

“Since we can’t say with absolute certainty they were made by a specific dinosaur, footprints are considered unique fossils and given their own scientific name,” said Adams, a doctoral candidate in the Roy M. Huffington Department of Earth Sciences at SMU.

The fossilized footprint, preserved in limestone, was dug up in the 1930s from the bed of the Paluxy River in north central Texas about an hour’s drive southwest of Dallas. In 1933 it was put on prominent permanent display in Glen Rose, Texas, embedded in the stone base of a community bandstand on the courthouse square.

The footprint already shows visible damage from erosion, and eventually it will be destroyed by gravity and exposure to the elements, Adams said. The 3D model provides a baseline from which to measure future deterioration, he said.

In comparing the 3D model to an original 1930s photograph made of the footprint, the researchers discovered that some surface areas have fractured and fallen away. By comparing the 3D model with a synthetically altered version, the researchers were able to calculate volume change, which in turn enables reconstruction of lost volume for restoration purposes.

Model comprises 52 scans totaling 2 gigabytes
Adams and his research colleagues took a portable scanner to the bandstand site to capture the 3D images. They employed a NextEngine HD Desktop 3D scanner and ScanStudio HD PRO software running on a standard Windows XP 32 laptop. The scanner and laptop were powered from outlets on the bandstand. The researchers used a tent to control lighting and maximize laser contrast.

Because of the footprint’s size — about 2 feet by 1.4 feet (64 centimeters by 43 centimeters) — multiple overlapping images were required to capture the full footprint.

Raw scans were imported into Rapidform XOR2 Redesign to align and merge them into a single 3D model. The final 3D model was derived from 52 overlapping scans totaling 2 gigabytes, the authors said.

The full-resolution 3D digital model comprises more than 1 million poly-faces and more than 500,000 vertices with a resolution of 1.2 millimeters. It is stored in Wavefront format. In that format the model is about 145 megabytes. The model is free for downloading from a link on Palaeontologia Electronica‘s web site.

3D digital footprint also available as a QuickTime virtual object
A smaller facsimile is also available from the journal as a QuickTime Virtual Reality object. In that format, users can slide their mouse pointer over the 3D footprint image to drag it to a desired viewing angle, and zoom and pan. Click here for the link to the QuickTime video.

Besides the 3D model, included with the Palaeontologia Electronica article is a link to a pdf of the original 1935 scientific article in which SMU geology professor Ellis W. Shuler described and identified the dinosaur that made the track.

Shuler’s article, no longer in print, is “Dinosaur Track Mounted in the Band Stand at Glen Rose, Texas,” published in Field & Laboratory. The clay molds and plaster casts Shuler made of the bandstand track are now lost, Adams said. Click here for the article.

Besides Adams and Jacobs, other co-authors on the article are paleontologists Christopher Strganac and Michael J. Polcyn in the Roy M. Huffington Department of Earth Sciences at SMU.

The research was funded by the Institute for the Study of Earth and Man at SMU. — Margaret Allen

SMU is a private university in Dallas where nearly 11,000 students benefit from the national opportunities and international reach of SMU’s seven degree-granting schools. For more information see www.smu.edu.

SMU has an uplink facility on campus for live TV, radio or online interviews. To speak with Adams or to book him in the SMU studio, call SMU News & Communications at 214-768-7650.

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Natl Geographic: Can Geothermal Energy Pick Up Real Steam?

In a story about using the potential of geothermal heat from beneath the Earth’s surface as a source of clean, renewable energy, National Geographic Daily News tapped the expertise of SMU geophysicist David Blackwell.

Blackwell is one of the foremost experts on geothermal energy. He heads SMU’s Geothermal Laboratory and his decades-long research led him to map the nation’s geothermal energy potential. The work of Blackwell and SMU Geothermal Lab coordinator Maria Richards recently received extensive news coverage after they released research showing vast geothermal energy potential beneath West Virginia.

Science journalist David LaGesse interviewed Blackwell for the Dec. 28 article “Can Geothermal Energy Pick Up Real Steam?

EXCERPT:

By David LaGesse
For National Geographic News

This story is part of a special series that explores energy issues. For more, visit The Great Energy Challenge.

Steam rising from a valley just north of San Francisco reminded early explorers of the gates of hell. Others saw the potential healing powers of the naturally heated water, and still others realized the steam could drive turbines to generate electricity.

It’s been 50 years since power plants began running off the pools of steam that sit under California’s Mayacamas Mountains. The pioneering plants in the area known as The Geysers highlighted the promise of geothermal energy, internal heat from the Earth with vastly greater energy potential than that of fossil fuels. But geothermal, virtually free of carbon emissions and more reliable than intermittent wind and solar energy, still provides only a small slice of the world’s energy.

Now amid the rush to alternative energies, geothermal advocates sense a new chance to mine the heat rising from Earth’s white-hot core. They plan to generate man-made steam by pumping water deep underground into hot, dry rocks in what’s called enhanced or engineered geothermal systems. They also despair that governments and businesses aren’t investing enough in the sophisticated technology needed to unlock the deep-seated energy.

“There’s a window of opportunity where geothermal can play a part in our energy future, and we risk missing it,” says David Blackwell, a geophysicist at Southern Methodist University.

Read the full story.

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2010 a year of advances for SMU scientific researchers at the vanguard of those helping civilization

From picking apart atomic particles at Switzerland’s CERN, to unraveling the mysterious past, to delving into the human psyche, SMU researchers are in the vanguard of those helping civilization understand more and live better.

With both public and private funding — and the assistance of their students — they are tackling such scientific and social problems as brain diseases, immigration, diabetes, evolution, volcanoes, panic disorders, childhood obesity, cancer, radiation, nuclear test monitoring, dark matter, the effects of drilling in the Barnett Shale, and the architecture of the universe.

The sun never sets on SMU research
Besides working in campus labs and within the Dallas-area community, SMU scientists conduct research throughout the world, including at CERN’s Large Hadron Collider, and in Angola, the Canary Islands, Mongolia, Kenya, Italy, China, the Congo Basin, Ethiopia, Mexico, the Northern Mariana Islands and South Korea.

“Research at SMU is exciting and expanding,” says Associate Vice President for Research and Dean of Graduate Studies James E. Quick, a professor in the Huffington Department of Earth Sciences. “Our projects cover a wide range of problems in basic and applied research, from the search for the Higgs particle at the Large Hadron Collider in CERN to the search for new approaches to treat serious diseases. The University looks forward to creating increasing opportunities for undergraduates to become involved as research expands at SMU.”

Funding from public and private sources
In 2009-10, SMU received $25.6 million in external funding for research, up from $16.5 million the previous year.

“Research is a business that cannot be grown without investment,” Quick says. “Funding that builds the research enterprise is an investment that will go on giving by enabling the University to attract more federal grants in future years.”

The funding came from public and private sources, including the National Science Foundation; the National Institutes of Health; the U.S. Departments of Agriculture, Defense, Education and Energy; the U.S. Geological Survey; Google.org; the Alfred P. Sloan Foundation; Texas’ own Hogg Foundation for Mental Health; and the Texas Instruments Foundation.

Worldwide, the news media are covering SMU research. See some of the coverage. Browse a sample of the research:

CERN and the origin of our universe
cern_atlas-thumb.jpgLed by Physics Professor Ryszard Stroynowski, SMU physics researchers belong to the global consortium of scientists investigating the origins of our universe by monitoring high-speed sub-atomic particle collisions at CERN, the world’s largest physics experiment.

Compounds to fight neurodegenerative diseases
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Synthetic organic chemist and Chemistry Professor Edward Biehl leads a team developing organic compounds for possible treatment of neurodegenerative diseases such as Parkinson’s, Huntington’s and Alzheimer’s. Preliminary investigation of one compound found it was extremely potent as a strong, nontoxic neuroprotector in mice.

Hunting dark matter
Dark%20matterthumb.jpgAssistant Professor of Physics Jodi Cooley belongs to a high-profile international team of experimental particle physicists searching for elusive dark matter — believed to constitute the bulk of the matter in the universe — at an abandoned underground mine in Minnesota, and soon at an even deeper mine in Canada.

Robotic arms for injured war vets
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Electrical Engineering Chairman and Professor Marc Christensen is director of a new $5.6 million center funded by the Department of Defense and industry. The center will develop for war veteran amputees a high-tech robotic arm with fiber-optic connectivity to the brain capable of “feeling” sensations.

Green energy from the Earth’s inner heat
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The SMU Geothermal Laboratory, under Earth Sciences Professor David Blackwell, has identified and mapped U.S. geothermal resources capable of supplying a green source of commercial power generation, including resources that were much larger than expected under coal-rich West Virginia.

Exercise can be magic drug for depression and anxiety
Exercise%20for%20anxiety%20thumb.jpg
Psychologist Jasper Smits, director of the Anxiety Research and Treatment Program at SMU, says exercise can help many people with depression and anxiety disorders and should be more widely prescribed by mental health care providers.

The traditional treatments of cognitive behavioral therapy and pharmacotherapy don’t reach everyone who needs them, says Smits, an associate professor of psychology.

Virtual reality “dates” to prevent victimization
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SMU psychologists Ernest Jouriles, Renee McDonald and Lorelei Simpson have partnered with SMU Guildhall in developing an interactive video gaming environment where women on virtual-reality dates can learn and practice assertiveness skills to prevent sexual victimization.

With assertive resistance training, young women have reduced how often they are sexually victimized, the psychologists say.

Controlled drug delivery agents for diabetes
brent-sumerlin.thumb.jpgAssociate Chemistry Professor Brent Sumerlin leads a team of SMU chemistry researchers — including postdoctoral, graduate and undergraduate students — who fuse the fields of polymer, organic and biochemistries to develop novel materials with composite properties. Their research includes developing nano-scale polymer particles to deliver insulin to diabetics.

Sumerlin, associate professor of chemistry, was named a 2010-2012 Alfred P. Sloan Research Fellow, which carries a $50,000 national award to support his research.

Human speed
Usain_Bolt_Berlin%2Csmall.jpgAn expert on the locomotion of humans and other terrestrial animals, Associate Professor of Applied Physiology and Biomechanics Peter Weyand has analyzed the biomechanics of world-class athletes Usain Bolt and Oscar Pistorius. His research targets the relationships between muscle function, metabolic energy expenditure, whole body mechanics and performance.

Weyand’s research also looks at why smaller people tire faster. Finding that they have to take more steps to cover the same distance or travel at the same speed, he and other scientists derived an equation that can be used to calculate the energetic cost of walking.

Pacific Ring of Fire volcano monitoring
E_crater1%20thumb.jpgAn SMU team of earth scientists led by Professor and Research Dean James Quick works with the U.S. Geological Survey to monitor volcanoes in the Pacific Ocean’s Ring of Fire near Guam on the Northern Mariana Islands. Their research will help predict and anticipate hazards to the islands, the U.S. military and commercial jets.

The two-year, $250,000 project will use infrasound — in addition to more conventional seismic monitoring — to “listen” for signs a volcano is about to blow.

Reducing anxiety and asthma
Mueret%20thumb.jpgA system of monitoring breathing to reduce CO2 intake is proving useful for reducing the pain of chronic asthma and panic disorder in separate studies by Associate Psychology Professor Thomas Ritz and Assistant Psychology Professor Alicia Meuret.

The two have developed the four-week program to teach asthmatics and those with panic disorder how to better control their condition by changing the way they breathe.

Breast Cancer community engagement
breast%20cancer%20100x80.jpgAssistant Psychology Professor Georita Friersen is working with African-American and Hispanic women in Dallas to address the quality-of-life issues they face surrounding health care, particularly during diagnosis and treatment of breast cancer.

Friersen also examines health disparities regarding prevention and treatment of chronic diseases among medically underserved women and men.

Paleoclimate in humans’ first environment
Cenozoic%20Africa%20150x120%2C%2072dpi.jpgPaleobotanist and Associate Earth Sciences Professor Bonnie Jacobs researches ancient Africa’s vegetation to better understand the environmental and ecological context in which our ancient human ancestors and other mammals evolved.

Jacobs is part of an international team of researchers who combine independent lines of evidence from various fossil and geochemical sources to reconstruct the prehistoric climate, landscape and ecosystems of Ethiopia in particular. She also identifies and prepares flora fossil discoveries for Ethiopia’s national museum.

Ice Age humans
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Anthropology Professor David Meltzer explores the western Rockies of Colorado to understand the prehistoric Folsom hunters who adapted to high-elevation environments during the Ice Age.

Meltzer, a world-recognized expert on paleoIndians and early human migration from eastern continents to North America, was inducted into the National Academy of Scientists in 2009.

Understanding evolution
Cane%20rate%2C%20Uganda%2C%2020%20mya%20400x300.jpgThe research of paleontologist Alisa WInkler focuses on the systematics, paleobiogeography and paleoecology of fossil mammals, in particular rodents and rabbits.

Her study of prehistoric rodents in East Africa and Texas, such as the portion of jaw fossil pictured, is helping shed more light on human evolution.

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CBS 11 DFW: Doctors using fiber optics for prosthetic limbs

CBS Channel 11 in Dallas-Fort Worth covered the research of SMU engineers Marc Christensen and Volkan Otugen who are working to develop technology that will someday help amputees have “feeling” in their artificial limbs.

The research is funded through a $5.6 million grant from the U.S. Department of Defense and industry for a center led by SMU’s Lyle School of Engineering. The goal is to develop revolutionary technology for advanced prosthetic limbs that will help amputees returning from war in Iraq and Afghanistan.

Two-way fiber optic communication between prosthetic limbs and peripheral nerves will be key to operating realistic robotic arms, legs and hands that not only move like the real thing, but also “feel” sensations like pressure and heat.

CBS Channel 11’s coverage aired Nov. 30: “Doctors Using Fiber Optics For Prosthetic Limbs.”

Read the full story.

EXCERPT:

By Keith Garvin
CBSDFW.COM

Imagine not being able to pick up a drink, a pen, or even hold a spouse’s hand. For thousands of North Texans living as amputees, that is reality. But, some local engineers are teaming up with medical science to help transform that reality and change lives.

Bernie Diamond of Fort Worth is the picture of health. The former fitness model turned hairdresser was on top of his game. But, three years ago, everything changed in a split second when he was randomly shot while standing outside a home in Dallas.

“I got shot at such a perfect angle that it shot through the wrist and blew out the entire back of my hand,” Diamond said.

After many surgeries and attempts to rehabilitate his left hand, Diamond and his doctors made the decision to amputate his hand just above the wrist.

“I remember I was crying the entire time saying please don’t take my hand, please don’t take my hand,” Diamond said.

He had to learn to function with a prosthetic replacement, which doesn’t allow for much movement. But, that’s what researchers at Southern Methodist University and the University of North Texas are trying to change.

“Today we have very sophisticated robotic arms,” explained Marc Christensen, chair of the electrical engineering department at SMU. “What we’re lacking is a good interface to control them.”

Dr. Gunter Gross at UNT, and Doctors Christensen and Volkan Otugen at SMU are working to create a system of fiber-optic wires and sensors that can replace the vast network of nerves inside a limb.

“It’s a link to send and receive information between the brain and the limb,” explained Dr. Otugen, chair of the mechanical engineering department at SMU.

Read the full story.