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SMU-North Texas Food Bank study will analyze causes of hunger in Dallas and rural North Texas

SMU with The Hunger Center of North Texas will look at the impact of social networks and social capital

Economics researchers at SMU will analyze the roles social networks and isolation play in fighting hunger in North Texas.

Recent studies have found that household economic resources are not the only factor contributing to food insecurity, according to SMU economist Thomas B. Fomby.

About 1 in 6 U.S. households are affected by food insecurity, meaning there’s not enough food at all times to sustain active, healthy lives for all family members, according to the U.S. Department of Agriculture.

“This study will analyze the role of other factors causing food insecurity, such as urban or rural settings, access to nutrition assistance programs, access to inexpensive groceries, family support and social stigma,” Fomby said.

Fomby, professor of economics and director of the Richard B. Johnson Center for Economic Studies, and Daniel Millimet, SMU professor of economics, are conducting the study. A $120,000 grant from the North Texas Food Bank is funding the research. The study will be complete in March 2014.

Household income a powerful predictor, but social networks play role
Although household income is the single most powerful predictor of food security, poverty and hunger are not synonymous. According to Feeding America, 28 percent of food insecure residents in Dallas County are ineligible for most nutrition assistance programs because they have incomes above 185 percent of the federal poverty level; and the U. S. Department of Agriculture reports that 58.9 percent of U.S. households with incomes below the poverty level are food secure. The reasons for this are not well understood.

“With this research, we expect to better understand the causes of food insecurity in North Texas and improve the assessment of at-risk households,” Fomby said.

The SMU study is one of two major research projects launching The Hunger Center of North Texas, a new collaborative research initiative created by the North Texas Food Bank. The University of North Texas is also collaborating on a study.

The studies will focus on the impact that “social networks” and “social capital” have on household food security. The central questions are:

  • How do social relationships and community conditions make it easier (or harder) for low-income households to keep healthy food on the table?
  • How do these social and community influences differ in the City of Dallas and rural areas of North Texas?

Groundbreaking research may help leverage social forces to reduce food assistance
“We believe that this research will be groundbreaking,” said Richard Amory, director of research for the North Texas Food Bank. “Nutrition assistance programs tend to approach individuals and households in isolation. Understanding the role that communities play in food security may help us leverage social forces to develop more effective programs and, ultimately, reduce the need for food assistance.”

The studies will start to shed some light on issues related to hunger in the community, said Kimberly Aaron, vice president of Policy, Programs and Research for the North Texas Food Bank.

“In performing our due diligence on existing research, while forming The Hunger Center, it became clear that many factors related to food insecurity are not well understood,” Aaron said.

SMU and the North Texas Food Bank recently formed a partnership, “Stampede Against Hunger,” to build on SMU’s strong support for NTFB, connecting campus groups already working with the food bank, as well as encouraging new types of participation for the campus and alumni community.

SMU support for the food bank has ranged from traditional food drives and volunteer work in the NTFB distribution center, to research for the food bank conducted by students in the Cox School of Business and the Bobby B. Lyle School of Engineering. Faculty and students from the Annette Caldwell Simmons School of Education and Human Development volunteer regularly in NTFB nutrition courses and Fondren Library staff organize a “Food for Fines” drive each year, waiving library fines in exchange for donations of non-perishable food items.

Fomby and Millimet are in the SMU Department of Economics in Dedman College. — Nancy George, and the NTFB

Follow SMU Research on Twitter, @smuresearch.

For more SMU research see www.smuresearch.com.

SMU is a nationally ranked private university in Dallas founded 100 years ago. Today, SMU enrolls nearly 11,000 students who benefit from the academic opportunities and international reach of seven degree-granting schools. For more information, www.smu.edu.

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

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Culture, Society & Family Learning & Education

Academic achievement improved among students active in structured after-school programs

Grades improved among elementary and middle school children participating in after-school activities at Boys and Girls Clubs of Greater Dallas

School-age children who participate in structured after-school activities improve their academic achievement, according to a new study from Southern Methodist University, Dallas.

The study by researchers in SMU’s Simmons School of Education and Human Development measured academic performance of students enrolled in Boys and Girls Clubs of Greater Dallas.

“Boys and Girls Clubs of Greater Dallas and other structured programs are really having a positive impact,” said Ken Springer, an associate professor. “We believe that the homework support that the clubs consistently provide students may be a key factor. Now we plan to extend the study and take into account more variables.”

The study looked at data on 719 students in second through eighth grade who participated in after-school activities at one of 12 clubs during the 2009-2010 academic year.

Among elementary and middle-school children who participated frequently in club activities, the researchers saw grades improve from the start of the year to the end of the year. That was especially true for elementary students. The researchers also saw improved school attendance for both age groups.

Among elementary students who participated in a greater variety of activities, the researchers observed that the students’ grade point averages improved, “but only among elementary students, and only when program participation was substantial,” said the authors.

Afterschool care can provide children with sense of success
Afterschool care activities can provide a child with a sense of success, even if that child isn’t necessarily successful in the classroom, said Deborah Diffily, co-author on the study and an associate professor in Simmons.

“For children who live in poverty — often those who attend Boys and Girls Clubs — the clubs can ameliorate the pressures of poverty, such as living in an overcrowded apartment or a lack of after-school snacks,” Diffily said.

The authors reported their findings in “The Relationship Between Intensity and Breadth of After-School Program Participation and Academic Achievement: Evidence from a Short-Term Longitudinal Study,” in the Journal of Community Psychology.

Springer and Diffily both teach within Simmons’ Department of Teaching and Learning.

Study considered how frequently children participated and the volume of activities
About 15 percent of American students participate in some sort of structured, supervised program outside of school, say the authors. Another 30 percent would participate if quality programming were available, they report.

“After-school programs are increasingly viewed as a means of supporting children’s physical, academic, social and behavioral development,” according to Springer and Diffily. Increasingly, federal funding is tied to empirical evidence that proves programs are beneficial.

Within the scientific literature, the psychological and social benefits of programs are well-documented, the authors said. Benefits observed include better social skills, greater motivation, better classroom behavior, higher self-esteem and lower rates of criminal activity.

However, evidence of any academic benefits is mixed. Some studies show benefits for grades or achievement test scores, while others don’t, said the authors. Those discrepancies have been attributed to variations in study methodologies. Rarely have studies considered intensity and breadth, as in the current study.

Boys and Girls Clubs’ unique structure is comprehensive, has history of success
Springer and Diffily looked specifically at children who are members of Boys and Girls Clubs of Greater Dallas, which is part of Boys and Girls Clubs of America, one of the nation’s oldest after-school programs.

A nonprofit organization, Boys and Girls Clubs of America comprises about 4,000 community-based clubs that serve more than 4 million children after school every weekday. Annual membership costs are low and cover daily access, homework support and choice of age-appropriate activities.

Each club’s programs span five areas: Character and Leadership; Education and Career; Health and Life Skills; Arts; and Sports, Fitness and Recreation.

During a daily, designated homework period, staff and volunteers divide the students into groups by age and help them complete their homework.

Methodology tapped BGCGD data logged for each participant
The study relied on absences and students’ grades for English, math and science from the first six weeks and the final six weeks of the school year.

Besides looking at grades and attendance, the researchers also calculated overall GPA and overall school absences.

Springer and Diffily found that the more frequent the participation, the greater the improvement in overall GPA. That correlation was stronger for elementary students, and for grades as opposed to school attendance.

Likewise, the researchers observed a positive correlation between activity and GPA. The more activities attended, the greater the increase in overall GPA among elementary students. Breadth wasn’t associated with improved GPA among middle-schoolers. Also, breadth didn’t impact absences for either age group.

Academic benefits may be the result of club influences or to shielding students from negative influences outside the clubs, or both, said Springer and Diffily.

“Children benefited from the clubs regardless of the extent of participation in any one program,” the authors said, “but the more programs for which they attended the majority of meetings, the greater the benefits. — Margaret Allen

Follow SMU Research on Twitter, @smuresearch.

For more SMU research see www.smuresearch.com.

SMU is a nationally ranked private university in Dallas founded 100 years ago. Today, SMU enrolls nearly 11,000 students who benefit from the academic opportunities and international reach of seven degree-granting schools. For more information, www.smu.edu.

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

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Culture, Society & Family Health & Medicine Researcher news SMU In The News Technology

DMN: Cowlishaw: Research by SMU professor shows blades give Pistorius edge

SMU professor says ‘blade runners’ offer significant advantage

Sports journalist Tim Cowlishaw with The Dallas Morning News has covered the long-running global controversy surrounding double-amputee South African sprinter Oscar Pistorius. Controversy has swirled around the sprinter over whether his light-weight, carbon-fiber prosthetic “Cheetah” legs give him a competitive advantage.

Cowlishaw’s Aug. 12 column “Research by SMU professor shows blades give Pistorius edge” quotes SMU’s Peter Weyand, an expert on human locomotion and on Pistorius’ competitive advantage.

Weyand helped lead a team of scientists who are experts in biomechanics and physiology in conducting experiments on Pistorius and the mechanics of his racing ability.

Weyand is widely quoted in the press for his expertise on human speed. He is an SMU associate professor of applied physiology and biomechanics in the Annette Caldwell Simmons School of Education & Human Development.

Read the full story.

EXCERPT:

By Tim Cowlishaw
Dallas Morning News

Four years ago, Dr. Peter Weyand’s research at Rice University helped overturn a ban that kept Oscar Pistorius, a double amputee from South Africa, from using his “blade runners” to compete on the same track with the world’s finest athletes.

Pistorius made history this past week in London where he reached the semifinals of the 400 meters and ran the anchor leg for the South African team in the men’s 4×400 relay.

Today Weyand is an associate professor at SMU. His locomotor performance laboratory sits just off campus. And the man who helped make Pistorius’ barrier-breaking trip to the Olympics possible isn’t sure that’s such a good thing.

Weyand contends that Pistorius has a significant advantage over “intact limb” runners. Former gold medal winner Michael Johnson made that statement before the London Games and was, essentially, laughed at.

In Weyand’s case, he has years of data to support it.

“The first order of business is to acknowledge his achievement — his Olympic qualification,” Weyand said. “We all like him. What he’s done is remarkable. It’s a story you couldn’t make up.

“But there’s a legitimate performance question, and we got involved on a scientific level to evaluate that question.”

In 2007, Pistorius was banned from standard competition by the IAAF (track’s governing body) because of German research that suggested Pistorius had an advantage based on lower oxygen consumption. Pistorius appealed to the Court of Arbitration for Sport, and Weyand’s team at Rice conducted the study that eventually cleared him to compete. […]

Read the full story.

SMU is a nationally ranked private university in Dallas founded 100 years ago. Today, SMU enrolls nearly 11,000 students who benefit from the academic opportunities and international reach of seven degree-granting schools. For more information see www.smu.edu.

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

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Culture, Society & Family Health & Medicine Plants & Animals Researcher news SMU In The News

The Economist: Faster, higher, no longer

Is it time to update the Olympic credo?

The Economist explores the question of whether the human body has maxed-out when it comes to breaking future Olympic athletic records.

The Aug. 4 article “Faster, higher, no longer” quotes SMU’s Peter Weyand, an expert in human speed and human locomotion.

Weyand helped lead a team of scientists who are experts in biomechanics and physiology in conducting experiments on South African Olympic sprinter Oscar Pistorius, a double amputee whose artificial “Cheetah” legs have stirred controversy, and the mechanics of his racing ability.

Weyand is widely quoted in the press for his expertise on human speed. He is an SMU associate professor of applied physiology and biomechanics in the Annette Caldwell Simmons School of Education & Human Development.

Read the full story.

EXCERPT:

The Economist
ON AUGUST 5th millions of people will watch the 100-metre final at the London Olympics. Many will wonder if anyone can repeat Usain Bolt’s feat in Berlin in 2009, when the Jamaican clocked 9.58 seconds, lopping 0.11 seconds—aeons in a sprint—off the previous world record, which he set at the 2008 Beijing games.

One person who thinks this unlikely is Mark Denny. Another 0.11 seconds would take the time below what Dr Denny, from Stanford University, reckons is the absolute limit of human athletic performance in the 100-metre dash.

In 2008 Dr Denny published a paper in which he crunched through the highest speeds achieved each year in running events from sprints to the marathon, some dating back to 1900 (see chart). A statistical technique called extreme-value analysis discerned trends and the maximum possible deviations from them. For the 100 metres, the human speed limit is 10.55 metres per second. This translates to 9.48 seconds.

Predicting the limits of human athletic prowess has been a popular parlour game among number crunchers. One study from 1992 had female marathon runners drawing level with men by 1998, to complete the 42.195km (26.2-mile) course in just under two hours and two minutes. (The current male record remains 1.5 minutes slower; for women it is 12 minutes slower still.) A more recent analysis from 2004 suggested that male and female 100-metre times will converge in 2156, at 8.08 seconds.

Nowadays sport statisticians view such calculations as flawed because they relied on linear extrapolations. They prefer to fit data to variants of a “logistic” curve. This produces an S-shaped plot more in line with the intuition that performance starts off relatively flat. It then goes through a period of rapid improvement as more people take part and more systematic approaches to training and nutrition get more out of them. It finally levels off as athletes inch towards the most a body can manage. [ … ]

[ … ] Statistics suggest that feats like those of Messrs Bolt and Beamon are increasingly improbable. But are they impossible? Peter Weyand, of Southern Methodist University in Texas, has shown that whereas the peak force which elite sprinters apply to the track is more than four times their body weight, they can squeeze even more out of their muscles. Dr Weyand found that the forces generated while athletes hopped on one leg as fast as they could on a high-speed treadmill were roughly twice as high as during running at top speed. This translated into 30% more ground force.

Since ground force is the main determinant of sprinting speed, Dr Weyand’s results imply that human muscles are capable of producing enough oomph to propel sprinters one-third faster than Mr Bolt’s 2009 record. The reason they have not is that in the normal, two-legged gait the foot is in contact with the ground for only around one-tenth of a second, 0.05 seconds less than when hopping. As a consequence, muscle fibres do not have enough time to contract to their full potential. Although tapping all this force while sprinting seems biomechanically inconceivable, there may be scope for slight alterations in training and gait, focused on increasing the peak power available to sprinters. For his part, Dr Denny would be thrilled to see any athlete breach his limits, but he isn’t putting any money on it.

Read the full story.

SMU is a nationally ranked private university in Dallas founded 100 years ago. Today, SMU enrolls nearly 11,000 students who benefit from the academic opportunities and international reach of seven degree-granting schools. For more information see www.smu.edu.

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

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Culture, Society & Family Health & Medicine Researcher news SMU In The News Technology

Sports Illustrated: Fair or foul? Experts split over whether Pistorius has advantage

Scientists debate whether prosthetic legs give Pistorius an unfair advantage in the 400-meter race

Sports journalist David Epstein at Sports Illustrated has written a comprehensive piece on the long-running global controversy surrounding double-amputee South African sprinter Oscar Pistorius, the first amputee to compete in the Olympics.

The Aug. 2 article “Fair or foul? Experts split over whether Pistorius has advantage” quotes SMU’s Peter Weyand, an expert in human locomotion.

Controversy has swirled around Pistorius as the debate continues over the scientific advantage he enjoys as a result of his high-tech, carbon fiber artificial legs. Weyand helped lead a team of scientists who are experts in biomechanics and physiology in conducting experiments on Pistorius and the mechanics of his racing ability.

Weyand is widely quoted in the press for his expertise on human speed. He is an SMU associate professor of applied physiology and biomechanics in the Annette Caldwell Simmons School of Education & Human Development.

Read the full story.

EXCERPT:

By David Epstein
Sports Illustrated

LONDON — Before he changed into his racing legs, South African double-amputee sprinter Oscar Pistorius made sure to greet each and every photographer who showed up to shoot his training session last Sunday at St. Mary’s University College in Twickenham, far in the south of London. At the very same time that one of his PR reps was insisting that he wouldn’t be talking at all today, Pistorius was busily talking to everyone he could see. He greeted every onlooker with a handshake, going back when he missed one person. “I think I forgot to greet you,” he said softly, and extended his hand. The display prompted a British photographer to remark: “I’ve never come across that. He doesn’t need any PR, does he?” And it’s all the more remarkable considering that such manners flowed from a man who is an A-list celebrity in South Africa. Pistorius has owned white tigers and racehorses, and the gossip pages recently reported that he’s dating a Russian supermodel. (Two days ago, a zealous fan showed him a photo of “Pistorius 2012” tattooed on her arm.)

That Pistorius is charismatic is beyond questioning. Nor is there any doubt of the magnitude of the inspiration he engenders. Pistorius’s Twitter picture is a shot of him — in his crescent, carbon-fiber Cheetah Flex-Feet — leaning down and jogging beside a little blonde girl whose own Cheetah legs are protruding, adorably, from beneath her tiny yellow sun dress. Or how about this scene, which sounds like the Paralympic variation of a bad barroom joke: guy with no lower arms or legs walks up to a guy born with no fibulas and starts asking about sprinting. But that actually happened, last year, the day before Pistorius ran in a Diamond League meet in New York City. Pistorius was gracious and patient in giving advice to the man, Andre Lampkin, a 23-year-old former football player who had recently lost parts of all four limbs to bacterial meningitis, and was still extremely wobbly on his new Cheetahs.

When the “Blade Runner” steps onto the track Saturday, it will be as South Africa’s top quarter-miler of 2012 and the first double-amputee (and first male Paralympian of any sort) to compete in the Olympics. And even though Pistorius — who had both lower legs amputated before he was a year old — is a veritable fount of inspiration, questions about his carbon fiber racing legs have followed him to London. Just before the Games began, Michael Johnson — Pistorius’s friend and the 400-meter world record holder — said that Pistorius should not be competing against able-bodied runners.

“My position is that because we don’t know for sure whether he gets an advantage from the prosthetics that he wears, it is unfair to the able-bodied competitors,” Johnson said. “That is hard for a lot of people to take and to understand when you are talking about an athlete and an individual who has a disability.” [ … ]

[ … ] Pistorius appealed the ban to the Court of Arbitration for Sport (CAS). He went for more testing, this time in a lab at Rice University run by physiologist Peter Weyand. The data from that testing found that Pistorius fatigued at a normal rate. Not to mention that energy efficiency has about as much to do with sprint performance as fuel efficiency does with drag-racing performance. University of Colorado physiologist Rodger Kram and Hugh Herr, a professor at MIT and world-renowned designer of prosthetics — both members of the scientific team that did the second analysis of Pistorius — presented the data to the CAS.

Herr, whose own designs have been commercialized by Össur, the company that makes the Cheetah Flex-Feet, has been Pistorius’s most vigorous supporter. And his life narrative bears an uncanny resemblance to that of Pistorius. Herr was a mountain-climbing prodigy, known as the “Boy Wonder,” until he suffered frostbite on a climbing trip as a 17-year-old in 1982 and lost both lower legs. Rather than accept the end of his climbing career, Herr immediately began designing climbing-specific prostheses that could change length mid-ascent and find purchase on nooks too small for human feet. And, almost as quickly, some of Herr’s competitors who saw a potentially unfair advantage called for him to be disqualified from competitive climbing. [ … ]

Read the full story.

SMU is a nationally ranked private university in Dallas founded 100 years ago. Today, SMU enrolls nearly 11,000 students who benefit from the academic opportunities and international reach of seven degree-granting schools. For more information see www.smu.edu.

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