Geiger-mode avalanche photodiodes (GM-APDs) are highly sensitive light detectors, capable of detecting single photons. Photons of certain wavelengths, when absorbed by photodiodes, generate electron-hole pairs in a process called impact ionization which can result in a multiplication of charges when occurring in an electric field.
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Researchers have developed a highly sensitive method for detecting hotspots in the environment, such as bushfires or military threats, by harnessing the focusing power of meta-optical systems.
Having good neighbors can be very valuable—even in the atomic world. A team of Amsterdam physicists was able to determine an important property of strontium atoms, a highly useful element for modern applications in atomic clocks and quantum computers, to unprecedented precision. To achieve this, they made clever use of a nearby cloud of rubidium atoms. The results were published in the journal Physical Review Letters this week.
A solution to a tricky groundwater riddle from Australia: Researchers at TU Wien have developed numerical models to simulate the movement of fluids in porous materials.
The Eagle Point Police chief and an officer were speaking with a suspect before he became agitated, grabbed a knife and wounded the officer
The suspect, wanted for wounding a Jacksonville police officer and K-9, has been added to the Texas 10 Most Wanted list
The Slidell officer hitched a ride with a bystander, who followed the suspect as she got in a vehicle to flee; the cop relayed information to colleagues, who arrested the suspects
Is there anything more dramatic than an exploding star? More than just extraordinarily bright, energetic events that can light up the sky for months, these explosions play important roles in the cosmos. Supernovas create heavy elements and spread them out into their surroundings, where they can be taken up in the next round of planet and star formation.
Sometimes space exploration doesn’t go as planned. But even in failure, engineers can learn, adapt, and try again. One of the best ways to do that is to share the learning, and allow others to reproduce the work that might not have succeeded, allowing them to try again. A group from MIT’s Space Enabled Research Group, part of its Media Lab, recently released a paper in Space Science Reviews that describes the design and testing results of a pair of passive sensors sent to the moon on the ill-fated Rashid-1 rover.
For years, astronomers have been on the hunt for the first generation of stars, primordial relics of the early universe. And now they may have just found them. Ari Visbal from the University of Toledo, Ohio and colleagues believe they’ve glimpsed so-called Population III (Pop III) stars following a detailed analysis of previous James Webb Space Telescope (JWST) observations of a distant galaxy called LAP1-B.
Quantum computers have the potential to model new molecules and weather patterns better than any computer today. They may also one day accelerate artificial intelligence algorithms at a much lower energy footprint. But anyone interested in using quantum computers faces a steep learning curve that starts with getting access to quantum devices and then figuring out one of the many quantum software programs on the market.
As fascinating as it may sound, it’s true. The ‘event’ happened in Florence, Italy, on October 27, 1954. In October of 1954, a match involving the Italian team Fiorentina was interrupted by mysterious visitors hovering above the stadium. The Fiorentina UFOs were part of a wave of mass-sightings across Europe – and it remains a mystery to this day. On that occasion one of the most massive UFO sightings in history took place: around 10 thousand people who were in the Artemio Franchi stadium watching the encounter between Fiorentina and Pistoiese witnessed the appearance of unidentified flying objects in the skies above the stadium.  Eventually, the match had to be suspended “because the spectators saw something in the sky” according to the official report of the match referee. According to the testimony of one of the players present in that match, defender Ardico Magnini, who was something of a legend at the club and had played for Italy at the 1954 World Cup. “I remember everything from A to Z,” he says. “It was something that looked like an egg that was moving slowly, slowly, slowly. Everyone was looking up and also there was some glitter coming down from the sky, silver glitter. “We were astonished we had never seen anything like it before. We were absolutely shocked.” He also remembered that a strange sticky and shiny material fell on the ground. Other testimonies relate the presence not of one but of several strange objects in the sky.  In the following days, numerous other UFO sightings were recorded in the towns near the stadium. That unknown substance did not only fall on the court, but it covered a good part of Florence before evaporating. Those who came into contact with this material describe it as similar to cotton but ungraspable as it disintegrated on contact. An explanation, rare but scientific, of this phenomenon, arrived many years later: it could have been large networks of connected webs, which appeared in the sky as globes, shining by the reflection of the Sun since that is how spiders migrate. Curiously, October coincides with the time of migration of the northern hemisphere spiders. However, the material found simultaneously with the appearance of UFOs was analyzed in the laboratory and the elements found do not coincide with those that are part of spider webs. Therefore, until this day, whatever the spectators and players saw floating above the Artemio Franchi stadium remains a profound mystery, and one of the best documented UFO cases in history. Source: The day UFOs stopped play Using the Green Bank Telescope (GBT), astronomers from West Virginia University and elsewhere have observed two distant pulsars identified with the Five-hundred-meter Aperture Spherical Radio Telescope (FAST). Results of the observational campaign, presented October 27 on the arXiv preprint server, deliver important insights into the properties of these two pulsars.
What do brains and the stock market have in common? While this might sound like a set-up for a joke, new research from U-M researchers reveals that the behaviors of brains and economies during crises can be explained using observations common in the realm of physics. Their work is published in the journal Proceedings of the National Academy of Sciences.
YouTube Video Here: https://www.youtube.com/embed/nALBijai_Yo?feature=oembed&enablejsapi=1 One of the most fascinating UFO videos ever filmed by NASA was recorded during space shuttle Atlantis’ trip to the International Space Station in September of 2006. During the 13-day mission, a number of mysterious objects were spotted by the Astronauts, and one in particular sighting caused Atlantis to delay their return to Earth. On September 19, 11 days into the mission, when the crew was preparing for their return home, astronauts aboard the shuttle informed the Mission Control Center that, following the test of the reaction control system, an object was seen moving in a co-orbital path with the Orbiter. The astronauts spotted the object using an onboard TV camera, but unfortunately, the resolution of the images was not high enough to identify the object. In a news report by Space.com from September 19 dubbed ‘Atlantis Landing Delayed After Mystery Object Spotted,’ we can see the importance not only NASA, but Astronauts gave to the object, and the confusion it created. “The question is ‘What is it?’” NASA’s shuttle program manager Wayne Hale said at the time, adding that the object – which appeared small and dark against a blue Earth in the video – could be something as simple as ice, ceramic cloth gap-filler, or a piece of harmless shim stock plastic known to be dangling from Atlantis’ heat shield. “Is it something benign like that, which we have seen before, or is it something more critical that we should pay attention to?” But was it only ice, ceramic cloth gap-filler, or a piece of harmless shim stock plastic known to be dangling from Atlantis’ heat shield? Or is it possible that the mysterious object may have been something far more mysterious? NASA Spaceflight wrote about the mystery object the same day as the space.com article was released stating that: “Shuttle Atlantis’ return home has been moved back a day, until Thursday morning, due to poor weather at the Kennedy Space Center, and continued analysis by NASA managers/Tiger Team to ascertain what an Unidentified Falling Object (UFO) may be after it was spotted near the orbiter.”  Speaking to NASA Spaceflight at the time, Wayne Hale said: “‘It appears to be tumbling, and it also appears to be rectangular in shape, but we have no scale to reference with that photography – so we still have a bit of a mystery there.” But despite trying to understand what it was, no one could say for sure. What NASA did know at the time is that nothing was missing from the orbited: “We have already cleared many parts of the orbiter (through that data),” confirmed Hale. “And we’ve spotted nothing missing.” But the one object wasn’t alone. Astronauts quickly spotted more mysterious objects near the shuttle. At the time, Atlantis commander Brent Jett described the objects as two rings, adding that: “It doesn’t look like anything I’ve seen outside the shuttle.” It is noteworthy to mention that during NASA Space Shuttle program, countless mysterious objects have been spotted not only near NASA’s Space Shuttles but near the International Space Station as well. Source: Video Footage Credit: NASA |
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