Real AI Will Need Biology: Computers Powered By Human Brain Cells - Neuroscience News
Real AI Will Need Biology: Computers Powered by Human Brain Cells - Neuroscience News
More Posts from Csmsdust and Others
There are many postdocs in academia, but not so many permanent researchers.
A new paper shows a statistics on where hundreds of Biomedical Sciences PhD graduates eventually ended up 10 years or more after graduation.
What strikes me there:
1. Sooo many postdocs go to administration positions after their postdoc is finished.
And it's true! I know so many people in administration who were good scientists before!
The following graph shows that from 418 PhD graduates, 325 went for a postdoc and 93 didn't. 145 administration/management/operation (AMO in the graph) positions in the end is for me a bit shocking.
2. The time for a postdoc in academia to actually get a permanent/non trainee position can be up to 13 years!
Only half of the people makes in in 6 years after OhD graduation. That's much longer than getting a permanent job in administration. I do not want to be 13 years postdoc. This is also one of the reasons people quit academia.
There are many more facts in the original article. Go read it if you're interested.
Dance for Two by Alan Lightman
Being You by Anil Seth
How story, God, and Your Lying Brain Turn Chaos into Order by Nancy Mimeles Carey
Your Brain is a Time Machine by Dean Buonomano
Some of the books I've read recently + the covers
cognoscit
by dashaplesen
Birthday presents ✨️
Archaeologists believe that around 417 cities, towns, and villages made up the unified civilization.
Remains of architectural forms and patterns, ceramics, sculptural art, architectural patterns, and unifying causeway constructions.
The magnitude of the labor int he construction of massive platforms, palaces, dams, causeways, and pyramids dating to the Middle and Late Preclassic periods, suggests a power to organize thousands of workers.
Illustrations of electrical sparks from Memorie - Classe di scienze fisiche, matematiche e naturali ser.3:v.1:disp.1 (1877).
Full text here.
‘Wrinkles’ in time experience linked to heartbeat
How long is the present? The answer, Cornell researchers suggest in a new study, depends on your heart.
They found that our momentary perception of time is not continuous but may stretch or shrink with each heartbeat.
The research builds evidence that the heart is one of the brain’s important timekeepers and plays a fundamental role in our sense of time passing – an idea contemplated since ancient times, said Adam K. Anderson, professor in the Department of Psychology and in the College of Human Ecology (CHE).
“Time is a dimension of the universe and a core basis for our experience of self,” Anderson said. “Our research shows that the moment-to-moment experience of time is synchronized with, and changes with, the length of a heartbeat.”
Saeedeh Sadeghi, M.S. ’19, a doctoral student in the field of psychology, is the lead author of “Wrinkles in Subsecond Time Perception are Synchronized to the Heart,” published in the journal Psychophysiology. Anderson is a co-author with Eve De Rosa, the Mibs Martin Follett Professor in Human Ecology (CHE) and dean of faculty at Cornell, and Marc Wittmann, senior researcher at the Institute for Frontier Areas of Psychology and Mental Health in Germany.
Time perception typically has been tested over longer intervals, when research has shown that thoughts and emotions may distort our sense time, perhaps making it fly or crawl. Sadeghi and Anderson recently reported, for example, that crowding made a simulated train ride seem to pass more slowly.
Such findings, Anderson said, tend to reflect how we think about or estimate time, rather than our direct experience of it in the present moment.
To investigate that more direct experience, the researchers asked if our perception of time is related to physiological rhythms, focusing on natural variability in heart rates. The cardiac pacemaker “ticks” steadily on average, but each interval between beats is a tiny bit longer or shorter than the preceding one, like a second hand clicking at different intervals.
The team harnessed that variability in a novel experiment. Forty-five study participants – ages 18 to 21, with no history of heart trouble – were monitored with electrocardiography, or ECG, measuring heart electrical activity at millisecond resolution. The ECG was linked to a computer, which enabled brief tones lasting 80-180 milliseconds to be triggered by heartbeats. Study participants reported whether tones were longer or shorter relative to others.
The results revealed what the researchers called “temporal wrinkles.” When the heartbeat preceding a tone was shorter, the tone was perceived as longer. When the preceding heartbeat was longer, the sound’s duration seemed shorter.
“These observations systematically demonstrate that the cardiac dynamics, even within a few heartbeats, is related to the temporal decision-making process,” the authors wrote.
The study also showed the brain influencing the heart. After hearing tones, study participants focused attention on the sounds. That “orienting response” changed their heart rate, affecting their experience of time.
“The heartbeat is a rhythm that our brain is using to give us our sense of time passing,” Anderson said. “And that is not linear – it is constantly contracting and expanding.”
The scholars said the connection between time perception and the heart suggests our momentary perception of time is rooted in bioenergetics, helping the brain manage effort and resources based on changing body states including heart rate.
The research shows, Anderson said, that in subsecond intervals too brief for conscious thoughts or feelings, the heart regulates our experience of the present.
“Even at these moment-to-moment intervals, our sense of time is fluctuating,” he said. “A pure influence of the heart, from beat to beat, helps create a sense of time.”
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