Browse our favorite dad gift ideas for the holiday season. Try to think outside the gift card this year.

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What is it like to be a dog? And what can we learn from them? Mark Rowlands's take, in his book The Happiness of Dogs, is full of insights, finds Abigail Beall

Echolocating bats can more easily find and pollinate long-stemmed flowers that stand out from the surrounding foliage, which may be why this floral trait evolved

An analysis of thousands of cognitive tests carried out by chimpanzees finds that the number of spectators influenced their performance in different ways depending on the difficulty of the task

We instinctively know that relaxing feels good, but we are now figuring out what it does to the brain and uncovering the best ways to unwind to maximise its benefits

Our metabolism's response to food is highly idiosyncratic and there are hints that tailoring our diet to these personal differences can deliver health benefits

Our metabolism's response to food is highly idiosyncratic and there are hints that tailoring our diet to these personal differences can deliver health benefits

An analysis of thousands of cognitive tests carried out by chimpanzees finds that the number of spectators influenced their performance in different ways depending on the difficulty of the task

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New research to better understand the biological factors of suicidal behaviour Researchers at the University of Glasgow are embarking on two new PhD projects to better understand the impact that biological factors may have on suicidal behaviour.

As a yearly blockbuster, Call of Duty, through sheer expense and effort, would like you to think it is the Die Hard of video games. Or, depending on the setting, the Saving Private Ryan of video games. But it is barely Black Hawk Down. This latest campaign in Call Of Duty: Black Ops 6 reminds me more of the forgettable Netflix shootfests that thumbnail their way across your TV screen as you try to find some gritty nothing to aid you in zoning out of life. Still, there is an anecdotal contingent of casual sofa sitters for whom Call Of Duty is the game. A balls-to-the-wall shooter to return to every winter and rinse through in a weekend. Ed has already gestured at its multiplayer, announcing: "yup, it's COD", like a deeply tired Captain Birdseye inspecting the day's catch, wondering when his life will change. But never mind that. How does the single player story mode hold up? Some are calling it the best campaign in years. And I guess that's true, in the sense that it is the least worst.

Read more

Google DeepMind claims its AlphaChip AI method can deliver “superhuman” chip designs that are already used in its data centres – but independent experts say public proof is lacking

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Maryland's new education chief, Carey Wright, an old-school champion of rigorous standards, is pushing back against efforts in other states to boost test scores by essentially lowering their exp

Human cognitive performance can be significantly influenced by the presence of audience members.

The post Study: Chimps Perform Better on Challenging Computer Tasks When They Have Audience appeared first on Sci.News: Breaking Science News.

Our metabolism's response to food is highly idiosyncratic and there are hints that tailoring our diet to these personal differences can deliver health benefits

Intimacy is about more than just physical connection; it’s about understanding and responding to your partner’s needs, desires, and boundaries. Being in tune with their non-verbal cues is one of the most effective ways to foster a deeper emotional connection, enhancing the pleasure you both feel. This article delves into how you can read your […]

The post How to Read Non-Verbal Cues for Better Intimacy in the Bedroom appeared first on Chart Attack.

Back in December, I reviewed Square Enix’s monster collecting RPG Dragon Quest Monsters: The Dark Prince on Switch. I loved …

Continue reading "‘Dragon Quest Monsters: The Dark Prince’ iOS Review – Much Better Than Switch, but Lacking in Two Ways"

A review of Labor’s City of Sydney council campaign finds earlier preselections and better policies are needed.

Analysis of a strain of the virus circulating in Central Africa shows genetic mutations indicative of sustained human-to-human spread

Cochlear implants—the neural prosthetic cousins of standard hearing aids—can be a tremendous boon for people with profound hearing loss. But many would-be users are turned off by the device’s cumbersome external hardware, which must be worn to process signals passing through the implant. So researchers have been working to make a cochlear implant that sits entirely inside the ear, to restore speech and sound perception without the lifestyle restrictions imposed by current devices.

A new biocompatible microphone offers a bridge to such fully internal cochlear implants. About the size of a grain of rice, the microphone is made from a flexible piezoelectric material that directly measures the sound-induced motion of the eardrum. The tiny microphone’s sensitivity matches that of today’s best external hearing aids.

Cochlear implants create a novel pathway for sounds to reach the brain. An external microphone and processor, worn behind the ear or on the scalp, collect and translate incoming sounds into electrical signals, which get transmitted to an electrode that’s surgically implanted in the cochlea, deep within the inner ear. There, the electrical signals directly stimulate the auditory nerve, sending information to the brain to interpret as sound.

But, says Hideko Heidi Nakajima, an associate professor of otolaryngology at Harvard Medical School and Massachusetts Eye and Ear, “people don’t like the external hardware.” They can’t wear it while sleeping, or while swimming or doing many other forms of exercise, and so many potential candidates forgo the device altogether. What’s more, incoming sound goes directly into the microphone and bypasses the outer ear, which would otherwise perform the key functions of amplifying sound and filtering noise. “Now the big idea is instead to get everything—processor, battery, microphone—inside the ear,” says Nakajima. But even in clinical trials of fully internal designs, the microphone’s sensitivity—or lack thereof—has remained a roadblock.

Nakajima, along with colleagues from MIT, Harvard, and Columbia University, fabricated a cantilever microphone that senses the motion of a bone attached behind the eardrum called the umbo. Sound entering the ear canal causes the umbo to vibrate unidirectionally, with a displacement 10 times as great as other nearby bones. The tip of the “UmboMic” touches the umbo, and the umbo’s movements flex the material and produce an electrical charge through the piezoelectric effect. These electrical signals can then be processed and transmitted to the auditory nerve. “We’re using what nature gave us, which is the outer ear,” says Nakajima.

Why a cochlear implant needs low-noise, low-power electronics

Making a biocompatible microphone that can detect the eardrum’s minuscule movements isn’t easy, however. Jeff Lang, a professor of electrical engineering at MIT who jointly led the work, points out that only certain materials are tolerated by the human body. Another challenge is shielding the device from internal electronics to reduce noise. And then there’s long-term reliability. “We’d like an implant to last for decades,” says Lang.

In tests of the implantable microphone prototype, a laser beam measures the umbo’s motion, which gets transferred to the sensor tip. JEFF LANG & HEIDI NAKAJIMA

The researchers settled on a triangular design for the 3-by-3-millimeter sensor made from two layers of polyvinylidene fluoride (PVDF), a biocompatible piezoelectric polymer, sandwiched between layers of flexible, electrode-patterned polymer. When the cantilever tip bends, one PVDF layer produces a positive charge and the other produces a negative charge—taking the difference between the two cancels much of the noise. The triangular shape provides the most uniform stress distribution within the bending cantilever, maximizing the displacement it can undergo before it breaks. “The sensor can detect sounds below a quiet whisper,” says Lang.

Emma Wawrzynek, a graduate student at MIT, says that working with PVDF is tricky because it loses its piezoelectric properties at high temperatures, and most fabrication techniques involve heating the sample. “That’s a challenge especially for encapsulation,” which involves encasing the device in a protective layer so it can remain safely in the body, she says. The group had success by gradually depositing titanium and gold onto the PVDF while using a heat sink to cool it. That approach created a shielding layer that protects the charge-sensing electrodes from electromagnetic interference.

The other tool for improving a microphone’s performance is, of course, amplifying the signal. “On the electronics side, a low-noise amp is not necessarily a huge challenge to build if you’re willing to spend extra power,” says Lang. But, according to MIT graduate student John Zhang, cochlear implant manufacturers try to limit power for the entire device to 5 milliwatts, and just 1 mW for the microphone. “The trade-off between noise and power is hard to hit,” Zhang says. He and fellow student Aaron Yeiser developed a custom low-noise, low-power charge amplifier that outperformed commercially available options.

“Our goal was to perform better than or at least equal the performance of high-end capacitative external microphones,” says Nakajima. For leading external hearing-aid microphones, that means sensitivity down to a sound pressure level of 30 decibels—the equivalent of a whisper. In tests of the UmboMic on human cadavers, the researchers implanted the microphone and amplifier near the umbo, input sound through the ear canal, and measured what got sensed. Their device reached 30 decibels over the frequency range from 100 hertz to 6 kilohertz, which is the standard for cochlear implants and hearing aids and covers the frequencies of human speech. “But adding the outer ear’s filtering effects means we’re doing better [than traditional hearing aids], down to 10 dB, especially in speech frequencies,” says Nakajima.

Plenty of testing lies ahead, at the bench and on sheep before an eventual human trial. But if their UmboMic passes muster, the team hopes that it will help more than 1 million people worldwide go about their lives with a new sense of sound.

The work was published on 27 June in the Journal of Micromechanics and Microengineering.

Few correctional facilities in the United States have treatment programs for individuals with opioid use disorder (OUD), despite clear evidence that certain medications reduce the risk of overdose and death. Even in facilities where treatment is available, the COVID-19 pandemic has complicated efforts to provide such care.

The Pew Charitable Trusts sent comments Jan. 4 to the Office of the National Coordinator for Health Information Technology (ONC) and the Centers for Medicare & Medicaid Services (CMS) urging them to support the easy exchange of individuals’ health records through a pair of regulations.

European Court of Auditors

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Engaging the fine motor system to produce letters by hand has positive effects on learning and memory

An analysis of thousands of cognitive tests carried out by chimpanzees finds that the number of spectators influenced their performance in different ways depending on the difficulty of the task