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Updated: 37 min 57 sec ago

Origins of Sun's swirling spicules discovered

Thu, 06/22/2017 - 21:14
For the first time, a computer simulation -- so detailed it took a full year to run -- shows how spicules form, helping scientists understand how spicules can break free of the sun's surface and surge upward so quickly.

Flexible wearable electronics use body heat for energy

Thu, 06/22/2017 - 18:31
In a proof-of-concept study, engineers have designed a flexible thermoelectric energy harvester that has the potential to rival the effectiveness of existing power wearable electronic devices using body heat as the only source of energy.

Switchable DNA mini-machines store information

Thu, 06/22/2017 - 18:29
Biomedical engineers have built simple machines out of DNA, consisting of arrays whose units switch reversibly between two different shapes. The arrays' inventors say they could be harnessed to make nanotech sensors or amplifiers. Potentially, they could be combined to form logic gates, the parts of a molecular computer.

Negative tweets can trash TV programs for other viewers

Thu, 06/22/2017 - 14:38
Negative social media comments about a television show tend to lower enjoyment for other viewers, while positive comments may not significantly boost their enjoyment, according to researchers.

System detects, translates sarcasm on social media

Thu, 06/22/2017 - 12:33
Researchers have developed a machine translation system for interpreting sarcastic statements in social media. It could one day help people on the autism spectrum, who often have difficulty interpreting sarcasm, irony and humor.

Text messaging effective support in treatment of HIV and tuberculosis

Thu, 06/22/2017 - 12:27
Mobile phone text messaging is a powerful tool for improving quality of care, researchers show. A new study has developed and tested a method in Mozambique, helping patients with severe diseases to follow through with their treatments.

Selfies: We love how we look and we're here to show you

Wed, 06/21/2017 - 16:53
Nearly 52 percent of all selfies fell into the appearance category: pictures of people showing off their make-up, clothes, lips, etc. Pics about looks were two times more popular than the other 14 categories combined, research found.

Chemical solution to shrink digital data storage

Wed, 06/21/2017 - 15:40
Chemists have found that commonly used polymer films containing two dyes can optically store data in a quaternary (four-symbol) code, potentially requiring about half as much space as binary code storage.

Common water treatments could damage DNA

Wed, 06/21/2017 - 15:39
A water treatment widely used in developing countries could be damaging the DNA of those drinking it, warn scientists. Despite poor evidence of their effectiveness as a water disinfectant, colloidal silver and silver nanoparticles are increasingly being promoted for treating potentially contaminated drinking water in low income countries.

Clear view on stem cell development

Wed, 06/21/2017 - 14:31
Today, tracking the development of individual cells and spotting the associated factors under the microscope is nothing unusual. However, impairments like shadows or changes in the background complicate the interpretation of data. Now, researchers have developed a software that corrects images to make hitherto hidden development steps visible.

Screen time or story time? E-books better for toddler learning

Wed, 06/21/2017 - 14:31
A new study analyses toddler's reading and learning habits through electronic books compared to print books.

Most people 'aren't as happy as their friends' on social media

Wed, 06/21/2017 - 14:30
A study led by computer scientists has found that people with the most connections on social media are also happier. This may cause most social media users to not only regard themselves as less popular than their friends but also less happy.

Plant inspiration could lead to flexible electronics

Wed, 06/21/2017 - 12:27
Versatile, light-weight materials that are both strong and resilient are crucial for the development of flexible electronics, such as bendable tablets and wearable sensors. Aerogels are good candidates for such applications, but until now, it's been difficult to make them with both properties. Now, researchers report that mimicking the structure of the 'powdery alligator-flag' plant has enabled them to make a graphene-based aerogel that meets these needs.

Mathematical biology tackles destructive plant virus

Tue, 06/20/2017 - 18:29
Plant diseases pose a serious threat to global food security, especially in developing countries, where millions of people depend on consuming what they harvest. In sub-Saharan Africa, one plant disease in particular -- maize lethal necrosis -- is ravaging one of the region's preferred crops for food, feed and income. But understanding its biology in order to manage the disease is difficult because the disease arises from two viruses interacting -- which is where mathematics comes into play.

Computer scientists repurpose laparoscopy video for medical training

Tue, 06/20/2017 - 18:29
A new system has been developed that can efficiently search through hundreds of hours of video for events and visual features that correspond to a few training examples. The researchers trained their system to recognize different stages of an operation, such as biopsy, tissue removal, stapling, and wound cleansing.

Cow herd behavior is fodder for complex systems analysis

Tue, 06/20/2017 - 15:42
With closer inspection, researchers have recognized that what appears to be a randomly dispersed herd peacefully eating grass is in fact a complex system of individuals in a group facing differing tensions. A team of mathematicians and a biologist has now built a mathematical model that incorporates a cost function to behavior in such a herd to understand the dynamics of such systems.

Illuminating a better way to calculate excitation energy

Tue, 06/20/2017 - 15:42
Researchers have demonstrated a new method to calculate excitation energies. They used a new approach based on density functional methods, which use an atom-by-atom approach to calculate electronic interactions. By analyzing a benchmark set of small molecules and oligomers, their functional produced more accurate estimates of excitation energy compared to other commonly used density functionals, while requiring less computing power.

Older dads have 'geekier' sons

Tue, 06/20/2017 - 15:41
Sons of older fathers are more intelligent, more focused on their interests and less concerned about fitting in, all characteristics typically seen in 'geeks,' suggests new British research.

A unique data center for cosmological simulations

Tue, 06/20/2017 - 15:41
Scientists have established 'Cosmowebportal', a unique data center for cosmological simulations. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

Developing a new balance for the new kilogram

Tue, 06/20/2017 - 13:33
In 2018 when the kilogram will be redefined, scientists will have developed the balance which is required for measuring: the Planck balance. This highly precise electronic weighing balance does not measure, as up to now, on the basis of the original kilogram using weights but refers to the fundamental physical constant: the Planck's constant. The balance will be used worldwide for calibrating other scales or balances so that those correspond to the system with this new method as required.