Technology

2020-05-18 17:16:00

One of our regular columnists, Xavier, purchased a 3D printer, the Prusa i3 MK3S. What should we think regarding when making this type of purchase? Why this one? How did the assembly and adjustments go? What are the first “impressions”? Good listening !

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#Special #edition #Prusa #MK3S #feedback

2023-09-17 17:10:02

JVTech News Something strange is happening with Dimorphos, the asteroid we deflected during the DART mission.

Published on 09/17/2023 at 7:10 p.m.

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The DART mission opened a new era in our understanding of planetary defense once morest potential threats from space, while raising exciting questions within the scientific community. The combination of the audacity of amateur science and the anticipation of future space missions promises to bring us clearer answers to the orbital mysteries of Dimorphos.

NASA’s DART Mission – Impact and Anomalies

Nearly a year has passed since NASA’s Double Asteroid Redirection Test (DART) mission struck Dimorphos, the smaller of the two asteroids that make up the Didymos system. This daring mission aimed to test the possibility of deflect the trajectory of an asteroid by hitting it, with the aim of protecting the Earth from a possible meteorite impact. Initially, the DART mission had no other objective.

On September 27, 2022, early in the morning (GMT), humanity sent a space probe to collide with Dimorphos, an asteroid more than 160 meters long in orbit around Didymos, another asteroid, more massive than its little brother . The mission was a success, since we managed to slightly deviate Dimorphos’ trajectory. However, this success was accompanied by an intriguing discovery: the orbital period of the asteroid was modified.

Initially, this period was 11 hours and 55 minutes, but following impact it increased to 11 hours and 23 minutes, i.e. a reduction of approximately 32 minutes. Subsequent calculations further refined this result, setting the orbital period reduction at 33 minutes, with a margin of error of approximately 18 seconds. Here’s where the weird stuff starts: a new study found that the reduction would currently be 34.2 minutes, with a margin of error of regarding 6 seconds.

The orbital period observations were made 20 to 30 days following impact, raising the possibility that the asteroid underwent an acceleration in the days following the first observations. Faced with the observation of a continuous reduction in the orbital period of Dimorphos, scientists are asking themselves new questions: today, astronomers around the world are looking into this anomaly to understand the causes.

An Original Study Produced by Amateurs and the Waiting for the Hera Mission

What makes the latest observation of Dimorphos even more unusual is that it was not carried out by a team of professional astronomers. The observations were made using a relatively modest telescope located at the Thacher Observatory in California. It is a 0.7 meter mirror telescope operated by the Thacher School, a preparatory education institution. Leading this initiative is a professor and his students, demonstrating that science and space research are not just for renowned experts. The draft detailing this study has been published on the ArXiv repository, where it will be reviewed by the scientific community. As you can imagine, although the results of these “amateurs” are promising, they require further confirmation.

While waiting for more definitive answers, the Hera mission of the European Space Agency (ESA) is preparing and it will surely have a major impact on future discoveries linked to the DART mission. Scheduled for October 2024, Hera will head towards the Didymos system, with an expected arrival in December 2026. This new mission will be able to conduct detailed in situ analyzes regarding the changes occurring in the Didymos system, particularly on Dimorphos. It will collect data not only on the orbital period of this asteroid, but also on its environment, including debris left by the impact and possible craters formed during the collision.

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#strange #happening #Dimorphos #asteroid #deflected #DART #mission

2023-09-15 07:01:54

Published on September 14, 2023 at 6:04 p.m. Updated on September 15, 2023 at 9:01 a.m.

A syndicate of almost thirty banks, prestigious investors, managers of the very prominent Nvidia who came during the roadshow, Nasdaq which rolls out the red carpet to welcome this British nugget… With so many “good fairies” on the cradle of Arm, the IPO might not be a “failure”.

The action of the Cambridge group which “designs” the chips which run many electronic devices, including almost all the smartphones on the planet, ended up 24.69%, to more than 63 dollars.

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#Arm #takes #steps #stock #market

2023-09-17 19:05:00
The iPhone 15, iPhone Pro 15 and 15 iPhone ProMax are the first of their kind to feature aerospace titanium designs. The same alloy used by spacecraft was used on missions to Mars, and titanium has one of the best strength-to-weight ratios of any metal. Which makes these Pro models the lightest ever. The internal frame of the device contains 100% recycled aluminum. As for the operating system, it is IOS17. The iPhone 15 contains an A16 Bionic chip with advanced features of all kinds, such as computational photography used to take clear images. 24 MP, next-generation portraiture, sound isolation for phone calls, and smooth performance in graphics-rich games. All this with amazing efficiency that ensures great battery life. This is not strange for a chip coming from the pro world. The iPhone 15 pro, iPhone 15 pro max, also contains additional features such as the presence of the A17 Pro chip, which is a completely new category of iPhone chips that offers the best official performance ever, and this is the largest re-processing. Design in the history of graphics processing units from Apple, with the presence of a professional-class hexa-core GPU. The devices contain a 48-megapixel main camera that is more advanced than ever before, as it captures ultra-high-resolution images with a new level of detail and color, and the pro iPhone 15 contains Multiple focal lengths to work with, it’s like having seven professional lenses on the phone. It also gives you amazing all-day battery life with up to 29 hours of video playback on the 15 iPhonePro Max13, and up to 23 hours of video playback on the iPhone Pro 15, plus a charger. MagSafe for fast and efficient wireless charging, and it also contains a new roadside assistance service via Satellite 15 that helps with things like a flat tire or dead battery, even when you are off the grid. It also contains an emergency SOS feature via Satellite 15, and crash detection, which are two vital features. For safety, they helped save lives. It is a means of privacy that gives you more control over your data. If you want to exchange information with another person, you have to bring your phone close to his phone, and you can choose what you want to share, and the information is transferred immediately. You can also add effects such as puffy. , shiny, and you can also create animated stickers from live photos. The iPhone 15 was launched in 5 new and different colors, including light yellow, light pink, light blue, and light green, in addition to black. As for the iPhone 15 Pro, and 15 iPhone Pro Maz were launched in four The colors are black, silver grey, white, and blue with a slight gray tinge. As for the prices, the iPhone 15 phone is 340 dinars, the iPhone 15 Pro phone is 380 dinars, and the Pro Max 15 iPhone phone is 455 dinars.
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#time.. #iPhone #phones #designed #titanium #space