This training will get you well-versed in American Sign Language for just $20

Learn beginner to advanced ASL signs while gaining a better understanding of the deaf culture and community.

  • From emergency situations to foreign language requirements and even diving, it's extremely useful to have sign language skills under your belt.
  • You can learn beginner to advanced American Sign Language (ASL) signs while gaining a better understanding of the deaf culture and community with this $20 master class.
  • The Complete American Sign Language Master Class provides students with 75 hours worth of training and CPD credits.
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Talking with your hands alters the perception of your words

A new study found that words are more accurately heard when accompanied by hand gestures.

  • A team of researchers from the Netherlands found that hands gestures, when used strategically, influence how certain words are heard.
  • Participants were 20% more likely to hear and interpret the words being spoken when accompanied by a matching hand gesture, and 40% as likely to hear the wrong word when the gestures did not match.
  • Previous research has suggested that certain hand gestures can signal extraversion and dominance, and that speaking with gestures in general tends to lead to being evaluated as warm, agreeable, and energetic.
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How one NY hospital system treated 128,000+ COVID cases

From making their own swabs to staying in constant communication across the board, Northwell Health dove headfirst into uncharted waters to take on the virus and save lives.

  • Preparing for a pandemic like COVID-19 was virtually impossible. Northwell Health president and CEO Michael Dowling explains how, as the largest healthcare provider in New York, his team had to continuously organize, innovate, and readjust to dangerous and unpredictable conditions in a way that guaranteed safety for the staff and the best treatment for over 128,000 coronavirus patients.
  • From making their own supplies when they ran out, to coordinating with government at every level and making sense of new statistics and protocols, Northwell focused on strengthening internal and external communication to keep the ship from sinking.
  • "There was no such thing as putting up the white flag," Dowling says of meeting the pandemic head on and reassuring his front line staff that they would be safe and have all the resources they needed to beat the virus. "It's amazing how innovative you can be in a crisis."
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World-record laser transmission could prove Einstein's theory

Researchers devise a record-breaking laser transmission that avoids atmospheric interference.

Credit: ICRAR
  • Researchers from Australia and France team up for a record-breaking laser transmission.
  • The new technique avoids atmospheric interference.
  • It can be used to test aspects of Einstein's theory of relativity and advance communications.

Scientists achieved the most stable transmission of a laser signal through the atmosphere ever made, beating a world record. The team managed to send laser signals from one point to another while avoiding interference from the atmosphere. Their very precise method can allow for unprecedented comparisons of the flow of time in separate locations. This can enable scientists to carry out new tests of Einstein's celebrated theory of general relativity, and have wide applications across different fields.

For the record transmission, the researchers combined phase stabilization technology with advanced self-guiding optical terminals. They used two identical phase stabilization systems, which had their transmitters located in one building while receivers were in another. One system used optical terminals to send the optical signal over a 265-meter free-space path between the buildings. Another system transmitted using a 715 meter-long optical fiber cable, essentially to keep tabs on the performance of the free-space link. The terminals were outfitted with mirrors to prevent interference like phase noise and beam wander.

The scientists hailed from Australia's International Centre for Radio Astronomy Research (ICRAR) and the University of Western Australia (UWA), as well as the French National Centre for Space Studies (CNES) and the French metrology lab Systèmes de Référence Temps-Espace (SYRTE) at Paris Observatory.

The study's lead author Benjamin Dix-Matthews, a Ph.D. student at ICRAR and UWA, highlighted the innovation and potential of their technique. "We can correct for atmospheric turbulence in 3-D, that is, left-right, up-down and, critically, along the line of flight," said Dix-Matthews in a press release. "It's as if the moving atmosphere has been removed and doesn't exist. It allows us to send highly stable laser signals through the atmosphere while retaining the quality of the original signal."


Credit: Dix-Matthews, Nature Communications

Block diagram (above) of the experimental link that shows two identical phase stabilization systems on the CNES campus. Both of the systems have their transmitter in the Auger building (local site), and both receivers are located in the Lagrange building (remote site). One transmits the optical signal over a 265 m free-space path in-between the buildings while utilizing tip-tilt active optics terminals. The other transmits using 715 m of optical fiber.

Dr. Sascha Schediwy, ICRAR-UWA senior researcher, envisioned numerous applications for their technology, whose precise performance beats even the best optical atomic clocks. Putting one of these optical terminals on the ground while another one is on a satellite in space would help the exploration of fundamental physics, according to Schediwy. Other applications could extend to testing Einstein's theories with greater precision as well as understanding the time-related changes of fundamental physical constants and making advanced measurements in earth science and geophysics.

Optical communications, a field that utilizes light for sending information, could also benefit. The new tech can improve its data rates by "orders of magnitude," thinks Dr. Schediwy. "The next generation of big data-gathering satellites would be able to get critical information to the ground faster," he added.

Check out the new study in Nature Communications.

Here’s how you know when someone’s lying to your face

When someone is lying to you personally, you may be able to see what they're doing.

Credit: fizkes/Adobe Stock
  • A study uses motion-capture to assess the physical interaction between a liar and their victim.
  • Liars unconsciously coordinate their movements to their listener.
  • The more difficult the lie, the more the coordination occurs.
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