Sheltersuit by the Sheltersuit Foundation is a life-saving wind and waterproof jacket that transforms into a sleeping bag to provide immediate shelter to the homeless who deserve “warmth, protection, and dignity.” (More info: https://youtu.be/_HOec-P6Jl4)
Pulsed lasers repeatedly emit light for a short period of time as if blinking. They have the advantage of focusing more energy than a continuous wave laser, whose intensity is kept unchanged over time. If digital signals are loaded in a pulsed laser, each pulse can encode one bit of data. In this respect, the higher the repetition rate, the more the amount of data that can be transmitted. However, conventional optical-fiber-based pulsed lasers have typically had a limitation in increasing the number of pulses per second above the MHz level.
The Korea Institute of Science and Technology (KIST) announced that the research team led by Senior Researcher Dr. Yong-Won Song at the Center for Opto-Electronic Materials and Devices was able to generate laser pulses at a rate at least 10000 times higher than the state of the art. This achievement was accomplished by inserting an additional resonator containing graphene into a fiber-optic pulsed–laser oscillator that operates in the domain of femtoseconds (10-15 seconds). The data transmission and processing speeds are expected to increase significantly by applying this method to data communications.
The KIST research team noted that the characteristics of the wavelength and intensity of laser light that change over time are correlated (Fourier transform). If a resonator is inserted into the laser oscillator, the wavelength of the pulsed laser is periodically filtered, thereby modifying the pattern of laser intensity change. Based on this background research, Principal Researcher Song synthesized graphene, which has the characteristics of absorbing and eliminating weak light and amplifying the intensity by passing only strong light into the resonator. This allows the laser intensity change to be accurately controlled at a high rate, and thus the repetition rate of pulses could be increased to a higher level.
Scientists are developing a range of second-generation Covid vaccines aimed at expanding protection against the disease.
To monitor the prevalence of the virus among employees nationwide, the tech billionaire worked with researchers to build an antibody-testing program. Here’s what he learned.
Summary: FOXO3, a gene linked to longevity in humans, protects neural stem cells from the negative effects of stress.
Source: Weill Cornell Medicine
The system has already been introduced as a pilot at gates, seating areas and other high-traffic zones around the Orlando International Airport.
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Music by Jesse Gallagher / https://www.youtube.com/nightimegallagher.
Time-lapse photography of Earth from ISS converted to real-time video.
Based on ESRSU image archive / eol.jsc.nasa.gov.
