In 2013, Mary Robinette Kowal published a story in an audio anthology called “The Lady Astronaut of Mars,” introducing what she described as “punch card punk” science fiction: a story of space exploration with all the trappings of the Apollo program. This summer, she’s added to that world with two new novels: The Calculating Stars and The Fated Sky.
The novels play out in a breathtaking alternate world where humanity must establish a foothold off-world after an asteroid devastates Earth. While that world-ending scenario sets the stage, it’s the underlying social issues that arise in the aftermath, from race relations to gender equality, that really drive the plot. The resulting duology is an enthralling read that’s pressingly relevant in 2018.
Now, engineers from the University of Minnesota have made another significant step in the development of bionic eyes. In a paper published this week in the journal Advanced Materials, the researchers describe how they 3D printed a prototype for a synthetic eyeball, equipped with photodetectors that allow the device to pick up light. The prototype could help usher in more advanced devices for visually impaired people.
“Here we demonstrate a fully 3D-printed hemispherical photodetector array that can sensitively detect images with a wide field-of-view,” Ruitao Su, a research assistant at the University of Minnesota who worked on the project, told Digital Trends. “The high efficiency of the photodetectors and the ability to readily customize the size and layout of the design render this approach … promising for the creation of bionic eyes.”
To make the device, the researchers began with a hemispherical glass cone, which they used as a sort of canvass to 3D print an array of photodetectors. Silver nanoparticles were used as conductive interconnections, and a couple layers of semiconductive components helped convert light into electricity. Finally, liquid metal was used to print cathodes on top. The whole process, which took about an hour, is pretty complicated but still generates a relatively primitive prototype.
This video is about Tuned Mass Dampers, which can be used to reduce or avoid unwanted vibrations, swaying, swinging, bending, etc on engineered structures ranging from buildings, skyscrapers, electricity power transmission lines, airplane engines, formula one race cars, etc. TMD’s use damped coupled oscillators.
Each Saturday Morning here at Adafruit is Saturday Morning Cartoons! Be sure to check our cartoon and animated posts both nostalgic and new that inspire makers of all ages! You’ll find how-tos for young makers, approaches to learning about science and engineering, and all sorts of comic strip and animated Saturday Morning fun! Be sure to check out our Adafruit products featuring comic book art while you’re at it!
The design concept of Roger Bot is based on two main features. The robotic arm functions and the the rover maneuverability functions. In addition to this, several sensors have been installed on the rover to retrieve sensory data and display them upon request on a LCD display. All the parts were designed using CATIA V5 software and exported as STL files and printed on a 3D printer.
Roger Bot is designed for indoors and will not be able to handle bumpy and crooked grounds although it performs well on smooth flat surfaces. This is a downfall on the drive capabilities for now and I hope to address this in the future with your input. It has a tripod style wheel arrangement with ample width between the back two wheels so that mild to intense robotic arm movements will not topple Roger Bot over. The three supports with rolling ball wheels on the underbelly of the rover acts as an additional support for the robot arm on the rover.
We live in a society with certain expectations. Expectations of what a woman does and does not do. Expectations of which jobs are respectable, often closely tied to making the most money, and what our goals should be – financially, professionally, and domestically. Many women let these expectations drive our life decisions, knowingly or not. This series is a celebration of women at work, doing what they love with no questions asked. It’s not about money or society’s image of success. At some point in their lives, they self-motivated their way to where they are now. Unapologetically doing their thing and doing it well.
In this short photography tutorial, we show you how you can improve your timelapses by taking long shutter exposures and exporting them in Adobe Premiere. By using a Polar Pro 10 stop neutral density filter, Patrick Hall increases his shutter from 1/3rd of a second to 2 full seconds when shooting in bright sunlight.