Uma viagem inesperada (Filme)
The good doctor (Série)
quinta-feira, 2 de abril de 2020
daily meditation could slow brain aging
02/04/20 26-23mar2020
Study suggests daily meditation slows brain aging by Bob Yirka , Medical Xpress
Researchers scanned [Budhist Monk] Yongey Mingyur Rinpoche's brain
via an MRI machine four times over the past 14 years.
Over the same period, the researchers also obtained MRI brain scans of a control group consisting of 105 other adults from the local area who were near in age to Yongey Mingyur Rinpoche.
The researchers then submitted all of the brain scans to an AI system called the Brain Age Gap Estimation (BrainAge) framework. It had been taught to make
educated guesses of a person's age by looking at brain scans.
It does its work by noting the structure of gray matter in the brain, which lessens in mass as a person ages.
The BrainAge system estimated Yongey Mingyur Rinpoche's age to be 33 [while he actual age was 41];
others in the control group fell into what the team described as the "typical aging band."
The researchers interpreted this result as evidence of his brain aging at a slower rate than the control group.
The researchers note that the BrainAge system did find some parts of Yongey Mingyur Rinpoche's brain that had aged in ways similar to the control group, suggesting that
brain aging differences between individuals may be due to coordinated changes throughout a person's gray matter.
They also noted that they had found evidence showing that Yongey Mingyur Rinpoche's brain
had matured earlier
than the brains of the others in the control group.
>8000 step a day could lower risk of early death, study finds
02apr20 26-24mar2020
compared with taking 4,000 steps per day,
taking 8,000 steps per day was associated with about a 50% lower risk of death and
taking 12,000 steps per day was associated with a 65% lower risk of death.
By contrast the team found no link between
mortality and the intensity of steps
– explored by looking at steps per minute – once the total number of steps taken was considered.
step monitoring in more than 4,800 adults aged 40 or over has shown that higher step counts are associated with a lower chance of death from any cause over a 10-year period. What is more, it seems individuals do not need to hit 10,000 steps a day to start seeing a benefit.
By contrast, taking 2,000 steps per day was linked to a 50% greater risk of death than hitting 4,000 steps per day, with 21.7 deaths per 1,000 adults per year compared with 14.4 deaths per 1,000 adults per year respectively.
Further analysing showed higher step counts were also associated with a lower risk of death from
cardiovascular disease and
cancer.
However, the study has limitations, including that
it cannot prove that the increased walking is the cause of a reduced risk of death, while
participants’ data on their health and lifestyle
was only collected at one point in time and by self-report,
and activity was only monitored over one week.
Speech recognition racial bias
02apr20 26-24mar2020
On average, the systems misunderstood
35 percent of the words spoken by blacks but only
19 percent of those spoken by whites.
Automated speech recognition less accurate for blacks: study
All five speech recognition technologies had error rates that were almost twice as high for blacks as for whites—even
when the speakers were matched by gender and age and
when they spoke the same words.
Error rates were highest for African American men, and the disparity was higher among speakers who made heavier use of African American Vernacular English.
Hidden bias
The researchers speculate that the disparities common to all five technologies stem from a common flaw—the machine learning systems used to train speech recognition systems likely rely heavily on databases of English as spoken by white Americans. A more equitable approach would be to
include databases that reflect a greater diversity of the accents and dialects of other English speakers.
While the study focused exclusively on disparities between black and white Americans, similar problems could affect people who speak with
- regional and
- non-native-English accents,
the researchers concluded.
If not addressed, this translational imbalance could have serious consequences for people's careers and even lives.
- Many companies now screen job applicants with automated online interviews that employ speech recognition.
- Courts use the technology to help transcribe hearings.
- For people who can't use their hands, moreover, speech recognition is crucial for accessing computers.
Coronavirus: what engineers could do?
02apr2020 26mar2020
... put a virologist, a social scientist and an engineer in the same room (or videoconference), and new ideas to delay transmission and safely allow wider elements of day-to-day life continue could emerge.
No country, has managed to deploy engineering solutions in a way that also helps day-to-day life continue in some safe way (in coronatimes).
When you look at the potential that engineering can bring to this in
- a public health (preventive) rather than
- a medical (restorative) setting,
it shows how much we're actually missing.
and one that focuses on the social science of public health. These groups feature experts across medicine, epidemiology and social sciences only.
But engineers? Not likely, it seems. There are no dams here to fix … or are there? Clearly the infection needs to be contained, and allowed to trickle out in a controlled flow in order for the whole system to be managed safely into a less critical state.
That sounds like an engineering challenge to me.
When we look at which countries have done relatively well in tackling the virus, there are signs of (computer) engineering at work. In South Korea it is reported that an app—Corona 100m—helped mobilise crowdsourced information on infections, both possible and actual. In China, part of the "effectiveness" in containing the deaths from the virus is reportedly due to the rapid construction of new hospitals. No country, however, has managed to deploy engineering solutions in a way that also helps day-to-day life continue in some safe way.
Ultimately, we need to design creative, workable and effective responses that better balance protection from the virus with disruption to daily life. Instead, we have scientists with fantastically deep knowledge about the biology and epidemiology of viruses, and maybe about the cognitive tricks that lean us towards doing one action over another.
What engineers could do
Let's pause for a moment and think about what could have been done to help slow the spread of COVID-19, without also shutting down the whole of society, with potentially huge, long-term economic and social consequences.
If virologists can give some insight into the main sources of transmission, could engineers design specific, deployable responses to that?
I'm not an engineer or a virologist, but I study how science, technology and engineering can be used in policy to change the world for the better. So while I don't have the answers, I can start the ball rolling.
What about focusing on the mass production and distribution of on-street hand sanitizer, or gloves treated with new, safe anti-viral coatings?
There may also be new ways of opening doors without grabbing the handle, or indeed pressing lift buttons.
Could we design better protective infrastructure for shop workers facing customers at tills?
What about bring-your-own trolley handles?
Or new kinds of easy-to-make and deploy protective face gear for the elderly and vulnerable?
Engineering solutions would have been especially effective early on during the outbreak, before measures like lockdown were introduced. But even during lockdown, they could help minimize the spread of the virus in the parts of society that are still open, such as banks and supermarkets.
Sat here on my own, I can't solve the problem, but put a virologist, a social scientist and an engineer in the same room (or videoconference), and new ideas to delay transmission and safely allow wider elements of day-to-day life continue could emerge.
When you look at the potential that engineering can bring to this in
- a public health (preventive) rather than
- a medical (restorative) setting,
it shows how much we're actually missing. It may be that these particular (disinfectant) solutions are not workable at scale, but the point is that engineers could probably come up with other design solutions that would work. It's their job.
The problem is, often social scientists just don't speak to or mix with engineers very much. It's a deep-rooted problem, like two parts of a family that fell out years ago over some obscure argument that nobody remembers, but everyone repeats.
I work at the Science, Technology, Engineering and Public Policy department at University College London. We see it as part of our mission to bring scientists and engineers together so everyone can benefit. The coronavirus case study shows now more than ever how much we need that kind of collaboration.
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