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May 29, 2024

Speeding up calculations that reveal how electrons interact in materials

Posted by in categories: energy, quantum physics

Materials scientists and engineers would like to know precisely how electrons interact and move in new materials and how the devices made with them will behave. Will the electrical current flow easily within the material? Is there a temperature at which the material will become superconducting, enabling current to flow without a power source? How long will the quantum state of an electron spin be preserved in new electronic and quantum devices?

May 29, 2024

New study unveils how water dynamics slow down at low temperatures

Posted by in category: futurism

A scientist at the Institute for Molecular Science has published a study that provides insight into the puzzling phenomenon of dynamic slowdown in supercooled water, an essential step toward understanding the glass transition in liquids.

May 29, 2024

Researchers create the world’s strongest ionizing terahertz radiation

Posted by in categories: electronics, energy

Lying between the microwave and infrared regions of the electromagnetic spectrum, the terahertz (1 THz = 10¹² Hz) gap is being rapidly closed by development of new terahertz sources and detectors, with promising applications in spectroscopy, imaging, sensing, and communication.

These applications greatly benefit from terahertz sources delivering high-energy or high-average-power radiation. On the other hand, high-intensity or strong-field terahertz sources are essential to observe or exploit novel nonlinear terahertz-matter interactions, where the electric and/or magnetic field strengths play a key role.

The team of scientists, led by Dr. Chul Kang from Advanced Photonics Research Institute, Gwangju Institute of Science and Technology (GIST), Korea, and Professor Ki-Yong Kim from Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, Maryland, U.S., has created the world’s strongest terahertz fields of 260 megavolts per centimeter (MV/cm) or equivalent peak intensity of 9 × 10¹³ watts per square centimeter (W/cm²).

May 29, 2024

The Mind After Midnight: Exploring the Dark Link Between Sleeplessness and Violence

Posted by in category: biotech/medical

An analysis of 15 years of national data on suicides and homicides shows that nocturnal wakefulness is associated with death by both suicide and homicide, possibly driven by deficits in behavioral and emotional regulation.

Risks for death by suicide and homicide peak at night, with nocturnal wakefulness, age, alcohol use, and relationship conflicts being especially prevalent as contributing factors. This is according to a new analysis by researchers in the Department of Psychiatry at the University of Arizona College of Medicine – Tucson.

May 29, 2024

The Frequencies of Cognition: Exploring How Our Brains Differentiate Sounds

Posted by in categories: media & arts, neuroscience

A study shows our brains use basic sound rates and patterns to distinguish music from speech, offering insights to enhance therapies for speech impairments like aphasia.

Music and speech are among the most frequent types of sounds we hear. But how do we identify what we think are differences between the two?

Continue reading “The Frequencies of Cognition: Exploring How Our Brains Differentiate Sounds” »

May 29, 2024

GaN-VCSELs Hit New Milestones: Japanese Researchers Achieve Unprecedented Resonance Control

Posted by in category: computing

The gallium nitride purple surface-emitting laser with a power conversion efficiency of more than 20%. Credit: Tetsuya Takeuchi / Meijo University.

Gallium nitride (GaN) vertical-cavity surface-emitting lasers (VCSELs) are semiconductor laser diodes with promising applications in various fields, including adaptive headlights, retinal scanning displays, point-of-care testing systems, and high-speed visible light communication systems. Their high efficiency and low manufacturing costs make them especially appealing for these applications.

GaN-VCSELs are composed of two layers of special semiconductor mirrors, called distributed Bragg reflectors (DBRs), separated by active GaN-semiconductor layers, which form the optical resonant cavity, where laser light is generated. The length of this resonant cavity is crucial for controlling the target laser wavelength, called the resonance wavelength.

May 29, 2024

Suicide Risk Increased in Women With Premenstrual Disorders, Study Finds

Posted by in category: neuroscience

Menstruation can often come with a degree of discomfort as the uterus prepares to shed. For some, the effects can be horrendous.

It’s estimated that some 5 to 8 percent of women experience moderate to severe symptoms that have a noticeably negative impact on their lives, mental health, and ability to function normally. These premenstrual disorders, or PMDs, affect millions of women globally, yet we know shockingly little about their long-term consequences.

Now, a new nationwide observational study in Sweden has shown that women with PMDs have an increased risk of suicide. In fact, they’re more than twice as likely to die by suicide as women without PMDs. It’s a sobering figure, one that strongly suggests more work needs to be done to understand PMDs, and help the people who suffer from them.

May 29, 2024

No, All That Sugar Won’t Make Your Kid Hyperactive. Even if They Have ADHD

Posted by in categories: energy, food

It’s a Saturday afternoon at a kids’ birthday party. Hordes of children are swarming between the spread of birthday treats and party games. Half-eaten cupcakes, biscuits and lollies litter the floor, and the kids seem to have gained superhuman speed and bounce-off-the-wall energy.

But is sugar to blame?

The belief that eating sugary foods and drinks leads to hyperactivity has steadfastly persisted for decades. And parents have curtailed their children’s intake accordingly.

May 29, 2024

NOAA predicts above-normal 2024 Atlantic hurricane season

Posted by in category: climatology

La Nina and warmer-than-average ocean temperatures are major drivers of tropical activity.

May 29, 2024

Ledger starts shipping its high-end hardware crypto wallet

Posted by in category: energy

Ledger, a French startup mostly known for its secure crypto hardware wallets, has started shipping new wallets nearly 18 months after announcing the latest Ledger Stax devices.

The updated wallet features an E-Ink display and has been designed in partnership with Tony Fadell, one of the main designers behind the iPod. E-Ink technology is generally used for e-book readers like the Amazon Kindle or the Rakuten Kobo because the displays look good in daylight and don’t require a lot of power.

After fulfilling all preorders, the company will list the Ledger Stax on its website once it has more stock available. The reason the hardware wallet fell behind schedule is the company may have overpromised on the design front. The Ledger Stax features a curved E-Ink display. It said it has been more difficult than expected to produce curved E-Ink displays at scale.

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