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Supercomputer simulations reveal strongest carbon nanotubes

A team of researchers discovered a new type of carbon nanotube that is approximately 40 percent stronger than other nanotubes made using the same number of atoms. This breakthrough was achieved through supercomputer simulations at the San Diego Supercomputer Center and the University of Michigan.

SourcePenn State·JournalPhysical Review Letters·DateSep 17, 2001

Clay reduces permeability of biomedical polymer

Scientists at Penn State have developed a new method to reduce the permeability of biomedical polymers using silicate clay, achieving a significant improvement in air and water resistance. The clay is mixed with the polymer in a common solvent, resulting in a barrier that effectively blocks many paths for air and water migration.

Survival of quaking aspen groves a complex problem

A study by Penn State researchers found that quaking aspen groves have declined by 30% in the last 50 years due to environmental changes such as fire suppression, livestock grazing, and increased herbivore populations. The unique history of the Lake Tahoe Basin also plays a role in this decline.

Quality health care means more than just access

A new study by Penn State researchers reveals that managed care plans' use of performance measures can lead to improved quality of care, but significant variations in effectiveness remain. The study found that tightly integrated relationships between healthcare providers and the plan are key factors in delivering high-quality care.

SourcePenn State·JournalHealth Services Research·DateJul 30, 2001

Study of flamingo genes reveals surprising family tree

A comprehensive study of flamingo genes reveals a shocking family tree, with the elegant flamingo's closest relative being the squat grebe. The study's findings suggest that physical features like long legs and webbed feet evolved repeatedly in aquatic bird species, contradicting traditional classification systems.

SourcePenn State·JournalProceedings of the Royal Society of London·DateJul 11, 2001

All fault lines are not equal

Researchers found a significant difference in movement on each side of the Eastern California Shear Zone, with one side moving more than the other due to varying heat flow properties. This discovery provides a more accurate method for modeling earthquake data and could be applicable in many places.

SourcePenn State·JournalGeophysical Research Letters·DateJul 6, 2001

Age matters when exercising in hot climates

Research by Penn State specialist Dr. W. Larry Kenney highlights the strain on older hearts when exercising in heat stress, increasing mortality rates among those over 65. Regular exercise and hydration countermeasures can mitigate effects, but individual factors like fitness level and medication impact thermoregulation.

Genes reveal new clues about the first flower

A Penn State study finds that both water lilies and Amborella are equally close genetically to the first flowering plant, offering new insights into its evolution. The analysis of DNA from three cellular compartments reveals a more diverse ancestry at the base of the angiosperm family tree.

SourcePenn State·JournalProceedings of the National Academy of Sciences·DateDec 18, 2000

Engineers find new ways to protect against hurricane damage

Researchers developed a new method to save lives and protect property in windstorm-prone areas using a laminated glass window unit with a sacrificial ply. The design concept is promising for enhancing hurricane resistance of windows and offers a cost-effective alternative to expensive shutters or boards.

SourcePenn State·JournalJournal of Architectural Engineering·DateDec 17, 2000

Butterfly ballots confusing and biasing say researchers

A study by Canadian and Penn State researchers found that butterfly ballots are more confusing than single-column ballots, potentially leading to errors in voting. The team tested the ballots with students and adults, finding that those using butterfly ballots rated them as more confusing and made systematic errors in voting.

SourcePenn State·JournalNature·DateNov 29, 2000

Oral contraceptive use does not affect bone mass

A long-term study of 62 white female participants aged 12-20 found that oral contraceptive pill (OCP) use did not impact their peak bone mass or hip bone mineral density, contrary to theoretical concerns. The findings are significant as they address the needs of young women who are concerned about body changes during adolescence.

SourcePenn State·JournalFertility and Sterility·DateNov 27, 2000

Managed care organizations focus on quality, but face challenges

A new study found that managed care organizations (MCOs) are moving towards instituting quality improvement programs, but may face significant barriers, including a lack of clear consensus among stakeholders and the desire for price over quality. MCO administrators believe that price alone drives most decisions to purchase healthcare.

SourcePenn State·JournalMedical Care Research and Review·DateNov 13, 2000

X-ray snapshots capture the first cries of baby stars

Astronomers using Chandra X-ray Observatory have discovered that protostars, the youngest stage of star formation, are marked by powerful X-rays from plasma ten times hotter and 100 to 100,000 times brighter than our Sun's flares. This has provided the closest look yet at the youngest stars in the Universe.