Summary: Researchers reveal how neurons set up and sustain the vital infrastructure that allows for seamless neurotransmission.
Source: picower institute for learning and memory.
The nervous system works because neurons communicate across connections called synapses. They “talk” when calcium ions flow through channels into “active zones” that are loaded with vesicles carrying molecular messages.
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The End is Nye is streaming August 25th on Peacock: https://pck.tv/3aKJfYf.
Synopsis: The End is Nye sends Bill Nye into the most epic global disasters imaginable – both natural and unnatural – and then demystifies them using science to show how we can survive, mitigate, and even prevent them. Each stand-alone episode takes a hell-bent dive into the mystery and terror of one specific threat. Every catastrophe is abundant with thrills, but also offers hope and a way forward —a scientific blueprint for surviving anything that comes our way. The series is hosted and executive produced by Emmy Award winner and renowned science educator, engineer, author, and inventor Bill Nye. Each episode also features a brief cameo by longtime science advocate and series EP Seth MacFarlane.
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What just happened? In addition to suing Elon Musk, Twitter is also blaming the world’s richest man for its falling revenue. The platform saw its number of users increase in the second quarter of the year, but that hasn’t translated to a healthier bottom line, something it partly blames on the disruption caused by Musk bidding for the company before walking away.
Twitter’s Q2 2022 results show its second-quarter revenue was $1.18 billion, representing both a quarterly and yearly decline, albeit only slightly. However, its average monetizable daily active users (mDAUs) was up 16.6% compared to Q2 2021, reaching 237.8 million globally.
$1.18 billion is no small sum, but Twitter’s costs and expenses for the quarter totaled $1.52 billion, an increase of 31% year-over-year. It reported net losses of $270 million, $33 million of which was related to the “pending acquisition” of the company. Q2 2021 saw a net profit of $66 million.
Two scientific teams have proposed new models of wormholes, one focusing on microscopic wormholes and one focusing on traversible ones for human travel.
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Intel’s Raptor Lake CPU has been benchmarked in Geekbench, and the results are quite impressive.
Normally, robotic arms are controlled by a GUI running on a host PC, or with some kind of analog system that maps human inputs to various degrees of rotation. However, Maurizio Miscio was able to build a custom robotic arm that is completely self-contained — thanks to a companion mobile app that resides on an old smartphone housed inside a control box.
Miscio started his project by making 3D models of each piece, most of which were 3D-printed. These included the gripper, various joints that each give a single axis of rotation, and a large circular base that acts as a stable platform on which the arm can spin. He then set to work attaching five servo motors onto each rotational axis, along with a single SG90 micro servo motor for the gripper. These motors were connected to an Arduino Uno that also had an HC-05 Bluetooth® serial module for external communication.
In order to operate the arm, Miscio developed a mobile app with the help of MIT App Inventor, which presents the user with a series of buttons that rotate a particular servo motor to the desired degree. The app even lets a series of motion be recorded and “played back” to the Uno over Bluetooth for repeated, accurate movements.
