From a very young age, we're warned against shouting "Fire!" in a crowded theater. The possibility of inciting mass panic presents an obvious moral problem. But for researchers, the situation also presents an interesting mathematical problem: How do large crowds of people behave in emergency situations? While many have turned to classical physics and calculus for the answer, a recent study shows that a branch of mathematics called fractional calculus may offer a more realistic picture of crowd dynamics.

Researchers conducted risk calculation on the influence of the temporary suspension of cervical cancer vaccination based on vaccination rates for female Japanese born between 1993 and 2008. They clarified that the risk of HPV infection varies considerably depending on the birth year. The findings suggest that infection risk may be reduced if vaccination encouragement is resumed and target groups are extended to include those females that were at target vaccination age during the suspension period.

Researchers have clarified important mechanisms involved in the formation of neural circuits in the brain, and discovered that delta-9-tetrahydrocannabinol (THC), a psychoactive substance also found in cannabis, causes disruption of neural circuits within the cortex. 

Experts often advise even openly gay and lesbian candidates to downplay their sexual orientation or risk losing votes, but David Niven, an assistant professor of political science at the University of Cincinnati, claimed at the annual meeting of the American Political Science Association in Philadelphia that not only does a gay or lesbian candidate's sexual orientation no longer pose a political disadvantage, but that it may actually help them win office.  

A new study indicates that playing video games for a limited amount of time each week may provide benefits to children, but too much can be detrimental. The findings are published in the Annals of Neurology.

There's much debate over the potential benefits and risks of video gaming in children and teens. To provide some clarity, Jesus Pujol, MD, of the Hospital del Mar in Spain, and his colleagues investigated the relationship between weekly video game use and certain cognitive abilities and conduct-related problems.

Researchers from the University of Birmingham have shed light onto the cognitive benefits of bilingualism, pointing to an enhanced ability to maintain attention and focus.

The results of the study, published in Bilingualism: Language and Cognition, suggest it is this improved attentional control that provides the 'bilingual advantage', rather than a better-than-average inhibitory control.