Welcome to NeoSystem.
This site is the homepage for some Open Source community projects: |
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Welcome to NeoSystem.
This site is the homepage for some Open Source community projects: |
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NASA last week formally approved a $3.35 billion mission to explore Saturn's largest moon with a quadcopter drone. "Dragonfly is a spectacular science mission with broad community interest, and we are excited to take the next steps on this mission," said Nicky Fox, associate administrator of NASA's science mission directorate. "Exploring Titan will push the boundaries of what we can do with rotorcraft outside of Earth." The mission has a launch date of July 2028. Ars Technica reports: After reaching Titan, the eight-bladed rotorcraft lander will soar from place to place on Saturn's hazy moon, exploring environments rich in organic molecules, the building blocks of life. Dragonfly will be the first mobile robot explorer to land on any other planetary body besides the Moon and Mars, and only the second flying drone to explore another planet. NASA's Ingenuity helicopter on Mars was the first. Dragonfly will be more than 200 times as massive as Ingenuity and will operate six times farther from Earth.
Despite its distant position in the cold outer Solar System, Titan appears to be reminiscent of the ancient Earth. A shroud of orange haze envelops Saturn's largest moon, and Titan's surface is covered with sand dunes and methane lakes. Titan's frigid temperatures -- hovering near minus 290 degrees Fahrenheit (minus 179 degrees Celsius) -- mean water ice behaves like bedrock. NASA's Cassini spacecraft, which flew past Titan numerous times before its mission ended in 2017, discovered weather systems on the hazy moon. Observations from Cassini found evidence for hydrocarbon rains and winds that appear to generate waves in Titan's methane lakes. Clearly, Titan is an exotic world. Most of what scientists know about Titan comes from measurements collected by Cassini and the European Space Agency's Huygens probe, which Cassini released to land on Titan in 2005. Huygens returned the first pictures from Titan's surface, but it only transmitted data for 72 minutes. Dragonfly will explore Titan for around three years, flying tens of kilometers about once per month to measure the prebiotic chemistry of Titan's surface, study its soupy atmosphere, and search for biosignatures that could be indications of life. The mission will visit more than 30 locations within Titan's equatorial region, according to a presentation by Elizabeth Turtle, Dragonfly's principal investigator at the Johns Hopkins University Applied Physics Laboratory. "The Dragonfly mission is an incredible opportunity to explore an ocean world in a way that we have never done before," Turtle said in a statement. "The team is dedicated and enthusiastic about accomplishing this unprecedented investigation of the complex carbon chemistry that exists on the surface of Titan and the innovative technology bringing this first-of-its-kind space mission to life." |
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quonset writes: Just over two weeks ago, NASA figured out why its Voyager 1 spacecraft stopped sending useful data. They suspected corrupted memory in its flight data system (FDS) was the culprit. Today, for the first time since November, Voyager 1 is sending useful data about its health and the status of its onboard systems back to NASA. How did NASA accomplish this feat of long distance repair? They broke up the code into smaller pieces and redistributed them throughout the memory.
From NASA: "... So they devised a plan to divide the affected code into sections and store those sections in different places in the FDS. To make this plan work, they also needed to adjust those code sections to ensure, for example, that they all still function as a whole. Any references to the location of that code in other parts of the FDS memory needed to be updated as well. The team started by singling out the code responsible for packaging the spacecraft's engineering data. They sent it to its new location in the FDS memory on April 18. A radio signal takes about 22 1/2 hours to reach Voyager 1, which is over 15 billion miles (24 billion kilometers) from Earth, and another 22 1/2 hours for a signal to come back to Earth. When the mission flight team heard back from the spacecraft on April 20, they saw that the modification worked: For the first time in five months, they have been able to check the health and status of the spacecraft. During the coming weeks, the team will relocate and adjust the other affected portions of the FDS software. These include the portions that will start returning science data. |
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Two months ago the team behind NASA's Ingenuity Helicopter released a video reflecting on its historic explorations of Mars, flying 10.5 miles (17.0 kilometers) in 72 different flights over three years. It was the team's way of saying goodbye, according to NASA's video. And this week, LiveScience reports, Ingenuity answered back: On April 16, Ingenuity beamed back its final signal to Earth, which included the remaining data it had stored in its memory bank and information about its final flight. Ingenuity mission scientists gathered in a control room at NASA's Jet Propulsion Laboratory (JPL) in California to celebrate and analyze the helicopter's final message, which was received via NASA's Deep Space Network, made up of ground stations located across the globe. In addition to the remaining data files, Ingenuity sent the team a goodbye message including the names of all the people who worked on the mission. This special message had been sent to Perseverance the day before and relayed to Ingenuity to send home. The helicopter, which still has power, will now spend the rest of its days collecting data from its final landing spot in Valinor Hills, named after a location in J.R.R. Tolkien's "The Lord of the Rings" books. The chopper will wake up daily to test its equipment, collect a temperature reading and take a single photo of its surroundings. It will continue to do this until it loses power or fills up its remaining memory space, which could take 20 years. Such a long-term dataset could not only benefit future designs for Martian vehicles but also "provide a long-term perspective on Martian weather patterns and dust movement," researchers wrote in the statement. However, the data will be kept on board the helicopter and not beamed back to Earth, so it must be retrieved by future Martian vehicles or astronauts. "Whenever humanity revisits Valinor Hills — either with a rover, a new aircraft, or future astronauts — Ingenuity will be waiting with her last gift of data," Teddy Tzanetos, an Ingenuity scientist at JPL, said in the statement. Thursday NASA's Jet Propulsion Laboratory released another new video tracing the entire route of Ingenuity's expedition over the surface of Mars. "Ingenuity's success could pave the way for more extensive aerial exploration of Mars down the road," adds Spacae.com: Mission team members are already working on designs for larger, more capable rotorcraft that could collect a variety of science data on the Red Planet, for example. And Mars isn't the only drone target: In 2028, NASA plans to launch Dragonfly, a $3.3 billion mission to Saturn's huge moon Titan, which hosts lakes, seas and rivers of liquid hydrocarbons on its frigid surface. The 1,000-pound (450 kg) Dragonfly will hop from spot to spot on Titan, characterizing the moon's various environments and assessing its habitability. |
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Long-time Slashdot reader AmiMoJo shares an article from TechSpot: Zilog is retiring the Z80 after 48 years on the market. Originally developed as a project stemming from the Intel 8080, it eventually rose to become one of the most popular and widely used 8-bit CPUs in both gaming and general computing devices.
The iconic IC device, developed by Federico Faggin, will soon be phased out, and interested parties only have a few months left to place their orders before Zilog's manufacturing partner ends support for the technology... Federico Faggin, an Intel engineer, founded Zilog in 1974 after his work on the Intel 4004, the first 4-bit CPU. The Zilog Z80 was then released in July 1976, conceived as a software-compatible 'extension' and enhancement of the Intel 8080 processor. Back in 1999 Slashdot was calling Zilog's updated eZ80 "one of the fastest 8-bit CPUs available today, executing code 4 times faster than a standard Z80 operating at the same clock speed." Another headline, from 2001: Zilog To File For Chapter 11... |
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Rachel Treisman reports via NPR: Authorities in the Russian republic of Chechnya are banning music they consider either too fast or too slow, effectively criminalizing many genres. The Chechen Ministry of Culture announced the ban on its website last week, by the order of Culture Minister Musa Dadayev and with the agreement of Chechen leader Ramzan Kadyrov. "Musical, vocal and choreographic" works will be limited to a tempo of 80 to 116 beats per minute (BPM) to "conform to the Chechen mentality and sense of rhythm," said Dadayev, according to the Russian state-run news agency TASS.
"Borrowing musical culture from other peoples is inadmissible," Dadayev said, per a translation by The Guardian. "We must bring to the people and to the future of our children the cultural heritage of the Chechen people. This includes the entire spectrum of moral and ethical standards of life for Chechens." Russian media report that artists have until June 1 to rewrite any music that doesn't conform to the new rule, though it's not clear how it will be enforced. [...] The government's crackdown on certain musical tempos would silence most modern music genres. Electronic styles of music like house, techno and dubstep all tend to have BPMs of over 116, says the audio tech company Izotope, while the average tempo of 2020's best-selling pop songs was 122 BPM, according to the BBC. The independent Russian news outlet Meduza said the tempo of the Russian national anthem would be considered too slow under the new limit, reports RadioFreeEurope/RadioLiberty. But it would seem to permit hip-hop music, which generally has a BPM of 85 to 95. "Chechnya is a roughly 6,700-square-mile autonomous republic situated in the North Caucasus of southern Russia and home to some 1.5 million people, the vast majority of whom are Muslim," notes NPR. "The U.S. Commission on International Religious Freedom has said Kadyrov's regime 'maintains hegemony through the imposition of a purported 'traditional' version of Islam, which falsely claims to defend local belief and culture, and combat violent extremism.'" "'In reality, Kadyrov has [co-opted] Chechen religion and culture to support his brutal regime, which violates the secular constitution of the Russian Federation and international standards of freedom of religion or belief,' it added." |
