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Science News for September 12, 2013


New research shows link between rates of gun ownership and homicides

A new study by Boston University School of Public Health researchers finds a robust correlation between estimated levels of gun ownership and actual gun homicides at the state level. The study, covering 30 years, found that each 1 percentage point increase in gun ownership is associated with a 0.9% increase in firearm homicide rate.

SourceBoston University School of Medicine·JournalAmerican Journal of Public Health·DateSep 12, 2013

Autophagy and neurodegenerative disorders

A review article by Kesidou et al. explores the molecular mechanisms of autophagy and its role in chronic and acute neurodegenerative disorders. The study highlights the complex interplay between autophagy's protective and damaging effects, emphasizing the need for further research to fully understand its implications.

SourceNeural Regeneration Research·JournalNeural Regeneration Research·DateSep 12, 2013

Americans living longer, more healthy lives

Researchers found that the average American can expect to live 2.4 more years with a healthy life, while a 65-year-old person gains 1.7 quality years. The study also identified troubling trends, including an increase in anxiety and problems with walking among younger Americans.

SourceUMass Chan Medical School·JournalAmerican Journal of Public Health·DateSep 12, 2013

More than just type 1 or type 2: DiMelli study points to different forms of diabetes

Researchers found that autoimmune type 1 diabetes is distinct from type 2, but phenotypic features can't be clearly assigned to specific disease types. The DiMelli study suggests a continuum of forms and mixed diabetes phenotypes, requiring refined criteria for diagnosis and treatment.

Hurricane research

Researchers at the University of Delaware are creating a fundamentally new approach to modeling hurricanes, integrating storm surge, wind speed, and flooding maps to inform evacuation decisions. The team hopes to reduce deaths and injuries by improving management of evacuation and shelter for hurricanes.

The efficient choice among combustion engines

Researchers at ETH Zurich developed an internal combustion engine that achieves fuel efficiency of less than 2.4l per 100km while emitting less than half the CO2 compared to traditional engines. The natural gas-diesel hybrid engine uses sophisticated control engineering and innovative electronic combustion control.

SourceETH Zurich·JournalEnergies·DateSep 12, 2013

Pulsating dust cloud dynamics modeled

Researchers propose a new spatio-temporal model to investigate molecular cloud fluctuations and their pulsational dynamics. The model takes into account nonlinear gravito-electrostatic coupling, helping elucidate basic features of cloud collapse, star formation, and galactic structures.

SourceSpringer·JournalThe European Physical Journal D·DateSep 12, 2013

Study suggests antioxidant treatment may help NF1-linked behavioral issues

Researchers found that defects in the NF1/Ras molecular pathway trigger production of harmful oxidative nitric oxide molecules in glial brain cells, leading to behavioral issues. Antioxidant treatment reversed symptoms in mouse models of NF1 and Costello syndrome, suggesting a potential therapeutic approach for related human conditions.

Researchers hit virtual heads to make safer games

A study by Washington State University researchers found that two softballs with different properties can result in significantly different injury risks when hit at high speeds. The team developed a virtual head model using Thums, a computerized skeletal system, to simulate collisions and quantify the effects of ball-impact.

SourceWashington State University·JournalProcedia Engineering·DateSep 12, 2013

A microbe's trick for staying young

Researchers have discovered a microbe called S. pombe that can escape aging when treated well and reproduce by splitting into two halves with new fully-functional material. The team found that under favourable growth conditions, the yeast is immune to aging and produces offspring that are younger than the parent.

SourceUniversity of Bristol·JournalCurrent Biology·DateSep 12, 2013

A century of human impact on Arctic climate indicated by new models, historic aerosol data

Researchers attribute Arctic surface temperature variation from 1900 to present to a combination of greenhouse gas emissions, anthropogenic sulfate aerosols, and volcanic eruptions. The study demonstrates the importance of aerosols in climate forcing and sheds light on the environmental and economic impacts of Arctic climate change.

SourceDesert Research Institute·JournalScientific Reports·DateSep 12, 2013

Exposure/ritual prevention therapy boosts antidepressant treatment of OCD

A form of cognitive behavior therapy (CBT) called exposure and ritual prevention has been shown to augment antidepressant treatment for obsessive-compulsive disorder (OCD), with 80% of patients responding compared to 23% on antipsychotics. The therapy works by retraining the brain's habit-forming circuitry to unlearn compulsive rituals.

SourceNIH/National Institute of Mental Health·JournalJAMA Psychiatry·DateSep 12, 2013

Biologists measure evolution's Big Bang

Researchers measured evolution rates during the Cambrian explosion, resolving 'Darwin's dilemma' and explaining the sudden appearance of modern animal groups. The study found that moderately accelerated evolution was sufficient to explain the emergence of arthropods.

SourceUniversity of Adelaide·JournalCurrent Biology·DateSep 12, 2013

Are women less corrupt?

A new study from Rice University finds that women are more likely to disapprove of and participate in anti-corruption efforts in countries where corruption is publicly condemned. However, the relationship between gender and corruption depends on institutional context.

SourceRice University·JournalPolitics and Gender·DateSep 12, 2013

Living the good life, longer

A new study by Harvard researchers found that Americans can look forward to over two extra years of healthy life compared to the past. The study analyzed data from multiple government-sponsored health surveys and found improvements in overall health, with reduced symptoms of disease and increased vitality.

SourceHarvard University·JournalAmerican Journal of Public Health·DateSep 12, 2013

Voyager 1 spacecraft reaches interstellar space

University of Iowa researchers confirm Voyager 1's entry into interstellar space after detecting electron plasma oscillations at a frequency corresponding to an electron density about 40 times greater than expected. The spacecraft is now the most distant human-made object at over 11.6 billion miles from the sun.

SourceUniversity of Iowa·JournalScience·DateSep 12, 2013

Medicare Center of Excellence Policy may limit minority access to weight-loss surgery

A new study published in JAMA found that the Medicare centers of excellence policy limited minority access to weight-loss surgery, with a 4.7 percentage point decline in non-white patients receiving bariatric surgery after policy implementation. The policy restricts patients to high-volume hospitals designated as centers of excellence.

A clinician's guide to managing moral distress

A new framework provides guidance for clinicians to manage moral distress, which can interfere with patient care and clinician well-being. The framework aims to create a healthy work environment supporting clinicians to practice with integrity and reduce the toll on caregivers and patients.

SourceJohns Hopkins Medicine·JournalJournal of Palliative Medicine·DateSep 12, 2013

Dogs' behavior could help to design social robots

A study found that dogs react sociably to robots that behave socially towards them, even if the devices look nothing like a human. The research suggests that designers of social robots should consider how their designs interact with users and animals.

SourceSpringer·JournalAnimal Cognition·DateSep 12, 2013

Study finds 30 percent lower risk of dying for diabetics with bypass surgery vs. stent

A recent study published in The Lancet Diabetes and Endocrinology found that people with diabetes have a 30% lower risk of dying if they undergo coronary artery bypass surgery (CABG) rather than angioplasty and inserting a stent (PCI). This significant finding has public health implications due to the large difference in outcomes.

SourceSt. Michael's Hospital·JournalThe Lancet Diabetes & Endocrinology·DateSep 12, 2013

The peanut at the heart of our galaxy

Astronomers used ESO's VISTA telescope to create the best 3D map yet of the Milky Way's central bulge, revealing an X-shaped structure. The galactic bulge is composed of 22 million red giant stars that can be used as standard candles to measure distances.

SourceESO·JournalMonthly Notices of the Royal Astronomical Society·DateSep 12, 2013

Revised Medicaid policy could reduce unintended pregnancies, save millions in health costs

A revised Medicaid sterilization policy could remove logistical barriers, reducing unintended pregnancies by 29,000 annually and saving $215 million in public health costs. The updated policy would prioritize informed decision-making and equitable access to sterilization, benefiting vulnerable populations.

The UK is not investing enough in research into multi-drug resistant infections, say researchers

A UK study finds that only 3.9% of total infectious disease research funding was allocated to antimicrobial resistance, highlighting the need for increased investment in this area. The study calls for strong leadership and sustained targeted spending to combat the growing threat of drug-resistant infections.

SourceOxford University Press UK·JournalJournal of Antimicrobial Chemotherapy·DateSep 12, 2013