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Bild/Foto
Ce n'est pas une peinture. C'est l'image la plus détaillée à ce jour d'une cellule humaine, obtenue par radiographie, résonance magnétique nucléaire et microscopie cryoélectronique.
(clic sur la photo pour agrandir).

#science #technologies #corps-humain #cellule
 
Bild/Foto
Ce n'est pas une peinture. C'est l'image la plus détaillée à ce jour d'une cellule humaine, obtenue par radiographie, résonance magnétique nucléaire et microscopie cryoélectronique.
(clic sur la photo pour agrandir).

#science #technologies #corps-humain #cellule
 

Dodging debris to keep satellites safe






Video: 00:01:31

Our planet is surrounded by spacecraft helping us study our changing climate, save lives following disasters, deliver global communication and navigation services and help us answer important scientific questions.

But these satellites are at risk. Accidental collisions between objects in space can produce huge clouds of fast-moving debris that can spread and damage additional satellites with cascading effect.

In this animation, find out how teams at ESA’s European Space Operations Centre in Darmstadt, Germany, take action to keep satellites safe after receiving an alert warning of a possible collision between an active satellite and a piece of space debris.

When the alert is raised, ESA experts determine the risk of a collision and plan a collision avoidance manoeuvre that can be used to get the satellite out of harm’s way if necessary.

Additional observations of the piece of space debris help the team better understand its path and the risk of collision. If that risk remains too high (typically 1 in 10 000), the planned manoeuvre is carried out to temporarily change the orbit of the satellite until the threat has passed.

Each manoeuvre comes at a price. They take skill and time to plan, cost precious fuel – shortening the lifetime of the mission – and often require instruments to be temporarily shut off, preventing them from collecting important data.

While most alerts do not end up requiring evasive action, the number of alerts is rapidly increasing. Hundreds are already issued every week. Several companies have begun to launch large constellations into low-Earth orbit to provide global internet access. They have great benefits, but could be a source of huge disruption if we do not change our behaviour.

In just a few years, our current methods for avoiding collisions in space will no longer be enough. To safeguard humankind’s continued access to space for future generations, ESA is developing technologies for an automated collision avoidance system.

Find out more about ESA’s Space Debris and Clean Space Offices, both part of the Space Safety Programme, and the Agency’s conference on space debris - the world’s largest on the topic - taking place in April 2021.

#news #space #science #esa #europeanspaceagency
posted by pod_feeder_v2
 

Dodging debris to keep satellites safe






Video: 00:01:31

Our planet is surrounded by spacecraft helping us study our changing climate, save lives following disasters, deliver global communication and navigation services and help us answer important scientific questions.

But these satellites are at risk. Accidental collisions between objects in space can produce huge clouds of fast-moving debris that can spread and damage additional satellites with cascading effect.

In this animation, find out how teams at ESA’s European Space Operations Centre in Darmstadt, Germany, take action to keep satellites safe after receiving an alert warning of a possible collision between an active satellite and a piece of space debris.

When the alert is raised, ESA experts determine the risk of a collision and plan a collision avoidance manoeuvre that can be used to get the satellite out of harm’s way if necessary.

Additional observations of the piece of space debris help the team better understand its path and the risk of collision. If that risk remains too high (typically 1 in 10 000), the planned manoeuvre is carried out to temporarily change the orbit of the satellite until the threat has passed.

Each manoeuvre comes at a price. They take skill and time to plan, cost precious fuel – shortening the lifetime of the mission – and often require instruments to be temporarily shut off, preventing them from collecting important data.

While most alerts do not end up requiring evasive action, the number of alerts is rapidly increasing. Hundreds are already issued every week. Several companies have begun to launch large constellations into low-Earth orbit to provide global internet access. They have great benefits, but could be a source of huge disruption if we do not change our behaviour.

In just a few years, our current methods for avoiding collisions in space will no longer be enough. To safeguard humankind’s continued access to space for future generations, ESA is developing technologies for an automated collision avoidance system.

Find out more about ESA’s Space Debris and Clean Space Offices, both part of the Space Safety Programme, and the Agency’s conference on space debris - the world’s largest on the topic - taking place in April 2021.

#news #space #science #esa #europeanspaceagency
posted by pod_feeder_v2
 

#Linux bans #University of #Minnesota for committing malicious #code


source: https://www.bleepingcomputer.com/news/security/linux-bans-university-of-minnesota-for-committing-malicious-code/
The move comes after a group of UMN researchers were caught submitting a series of malicious code commits, or #patches that deliberately introduced #security vulnerabilities in the official Linux #codebase, as a part of their #research activities.
These days I often have the feeling that everyone is going #crazy and has reached the end of their intellectual capacity. :(

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#Fail #science #bug #exploration #software #source #opensource #floss #freedom #news
 

#Linux bans #University of #Minnesota for committing malicious #code


source: https://www.bleepingcomputer.com/news/security/linux-bans-university-of-minnesota-for-committing-malicious-code/
The move comes after a group of UMN researchers were caught submitting a series of malicious code commits, or #patches that deliberately introduced #security vulnerabilities in the official Linux #codebase, as a part of their #research activities.
These days I often have the feeling that everyone is going #crazy and has reached the end of their intellectual capacity. :(

Bild/Foto

#Fail #science #bug #exploration #software #source #opensource #floss #freedom #news
 

Geomojis Translate Geoscience Across Any Language - Eos


Cool! I like the idea!
#emoji #picograms #science
Geomojis Translate Geoscience Across Any Language
 
This brittle title doesn't do the article justice, or does it. It is about immune systems and gene introgression. From the abstract:
We infer that the East Asian ancestors of Pacific populations may have diverged from Taiwanese Indigenous peoples before the Neolithic expansion, which is thought to have started from Taiwan around 5,000 years ago2,3,4.

Genomic insights into population history and biological adaptation in Oceania


#taiwan #science #nature #thishaspoliticalimplications #neolithic
 
#science #sciencemanuelacasasoli
Lift off!
This is, undoubtedly, the Picture Of The Day
NASA’s Ingenuity Mars helicopter became the first aircraft in history to make a powered, controlled flight on another planet.

NASA’s Ingenuity Mars Helicopter Succeeds in Historic First Flight
Lift off! First flight on Mars launches new way to explore worlds
 
#science #sciencemanuelacasasoli
Lift off!
This is, undoubtedly, the Picture Of The Day
NASA’s Ingenuity Mars helicopter became the first aircraft in history to make a powered, controlled flight on another planet.

NASA’s Ingenuity Mars Helicopter Succeeds in Historic First Flight
Lift off! First flight on Mars launches new way to explore worlds
 

Mystery canine illness identified as animal coronavirus


Another coronavirus!
#science #dogs
 
#Alternet #Science #Climate #ScientificAmerican
 
#Alternet #Science #Climate #ScientificAmerican
 

St. Vincent’s Volcanic Eruption: Misconceptions Debunked And Questions Answered


#science #volcano #StVincent
 

To cut or not to cut: The case of Chaucer’s Canterbury Tales | Result In Brief | CORDIS | European Commission

How or whether to censor literature is an age-old question. Using medieval and early modern copies of The Canterbury Tales, an EU-funded project provides a new perspective on censorship.
“Some manuscripts leave out objectionable passages or replace objectionable words. Others elaborate on famous passages, such as the end of The Merchant’s Tale, where two characters have a sexual encounter in a pear tree,”
Hah!

#history #science #literature

https://cordis.europa.eu/article/id/428774-to-cut-or-not-to-cut-the-case-of-chaucer-s-canterbury-tales?pk_campaign=tw
 

To cut or not to cut: The case of Chaucer’s Canterbury Tales | Result In Brief | CORDIS | European Commission

How or whether to censor literature is an age-old question. Using medieval and early modern copies of The Canterbury Tales, an EU-funded project provides a new perspective on censorship.
“Some manuscripts leave out objectionable passages or replace objectionable words. Others elaborate on famous passages, such as the end of The Merchant’s Tale, where two characters have a sexual encounter in a pear tree,”
Hah!

#history #science #literature

https://cordis.europa.eu/article/id/428774-to-cut-or-not-to-cut-the-case-of-chaucer-s-canterbury-tales?pk_campaign=tw
 
#science #sciencemanuelacasasoli
Adding is favoured over subtracting in problem solving
A series of problem-solving experiments reveal that people are more likely to consider solutions that add features than solutions that remove them, even when removing features is more efficient.

Adams et al. (2021) People systematically overlook subtractive changes: https://www.nature.com/articles/s41586-021-03380-y
 
#science #sciencemanuelacasasoli
Adding is favoured over subtracting in problem solving
A series of problem-solving experiments reveal that people are more likely to consider solutions that add features than solutions that remove them, even when removing features is more efficient.

Adams et al. (2021) People systematically overlook subtractive changes: https://www.nature.com/articles/s41586-021-03380-y
 

Why the volcano erupting in the Caribbean has such a deadly reputation

Before European colonists arrived in the early 1700s, the Indigenous population dwelled along the coast, away from the danger of any potential eruptions. But after becoming a British colony in the 1760s, the island’s enslaved population was forced to live and work in the volcano’s shadow. Many enslaved people died after an eruption in 1812, and many of their descendants perished when a 1902-03 eruption devastated a huge swath of the island.
#StVincent #LaSoufrière #volano #history #science
 

Rates of Parkinson’s disease are exploding. A common chemical may be to blame | Parkinson's disease | The Guardian

Researchers believe a factor is a chemical used in drycleaning and household products such as shoe polishes and carpet cleaners
#science #medicine #health #dementia #Parkinsons
 

Rates of Parkinson’s disease are exploding. A common chemical may be to blame | Parkinson's disease | The Guardian

Researchers believe a factor is a chemical used in drycleaning and household products such as shoe polishes and carpet cleaners
#science #medicine #health #dementia #Parkinsons
 

Hydraulics Made Simple





#science #flow #hazenwilliamsequation #hydraulics #pipe #pipeline #pressure #reynoldsnumber #hackaday
posted by pod_feeder_v2
Hydraulics Made Simple
 

Hydraulics Made Simple





#science #flow #hazenwilliamsequation #hydraulics #pipe #pipeline #pressure #reynoldsnumber #hackaday
posted by pod_feeder_v2
Hydraulics Made Simple
 
Bild/Foto
Bild/Foto
#science #sciencemanuelacasasoli
Deep ocean. At night.
Divers practicing blackwater photography are helping marine scientists gain new insights into fish larvae.
The Ocean’s Youngest Monsters Are Ready for Glamour Shots
 
Bild/Foto
Bild/Foto
#science #sciencemanuelacasasoli
Deep ocean. At night.
Divers practicing blackwater photography are helping marine scientists gain new insights into fish larvae.
The Ocean’s Youngest Monsters Are Ready for Glamour Shots
 

Study shows masks, ventilation stop COVID spread better than social distancing

A new study from the University of Central Florida suggests that masks and a good ventilation system are more important than social distancing for reducing the airborne spread of COVID-19 in classrooms.
#corona #science #classroom
 
#science #sciencemanuelacasasoli
Chocolate? Thanks to microbes!
Even the biggest chocolate lovers [...] might not recognize what this ancient food has in common with kimchi and kombucha: its flavors are due to fermentation.
 
#science #sciencemanuelacasasoli
Chocolate? Thanks to microbes!
Even the biggest chocolate lovers [...] might not recognize what this ancient food has in common with kimchi and kombucha: its flavors are due to fermentation.
 

Scientists Just Killed the EmDrive


#science #news #technology
 

Scientists Just Killed the EmDrive


#science #news #technology
 

Capybara enthusiast auf Twitter: "Detection of Rotational Variability in Floofy Objects at Optical Wavelengths by @mayorgalc et al. https://t.co/k9xcC9TbN4 https://t.co/byud8Iig1P" / Twitter


When #cats #caturday meets #science

https://twitter.com/lukedones/status/1377437293460430848
 
#science #sciencemanuelacasasoli
Early humans far from the South African coast collected unusual objects
Cultural evolution of early humans: innovations may have developed within a wet savannah environment.

Wilkins et al. (2021) Innovative Homo sapiens behaviours 105,000 years ago in a wetter Kalahari: https://www.nature.com/articles/s41586-021-03419-0
 
#science #sciencemanuelacasasoli
Early humans far from the South African coast collected unusual objects
Cultural evolution of early humans: innovations may have developed within a wet savannah environment.

Wilkins et al. (2021) Innovative Homo sapiens behaviours 105,000 years ago in a wetter Kalahari: https://www.nature.com/articles/s41586-021-03419-0
 

Frontiers | Fragmentary Blue: Resolving the Rarity Paradox in Flower Colors | Plant Science

Blue is a favored color of many humans. While blue skies and oceans are a common visual experience, this color is less frequently observed in flowers. We first review how blue has been important in human culture, and thus how our perception of blue has likely influenced the way of scientifically evaluating signals produced in nature, including approaches as disparate as Goethe’s Farbenlehre, Linneaus’ plant taxonomy, and current studies of plant-pollinator networks. We discuss the fact that most animals, however, have different vision to humans; for example, bee pollinators have trichromatic vision based on UV-, Blue-, and Green-sensitive photoreceptors with innate preferences for predominantly short-wavelength reflecting colors, including what we perceive as blue. The subsequent evolution of blue flowers may be driven by increased competition for pollinators, both because of a harsher environment (as at high altitude) or from high diversity and density of flowering plants (as in nutrient-rich meadows). The adaptive value of blue flowers should also be reinforced by nutrient richness or other factors, abiotic and biotic, that may reduce extra costs of blue-pigments synthesis. We thus provide new perspectives emphasizing that, while humans view blue as a less frequently evolved color in nature, to understand signaling, it is essential to employ models of biologically relevant observers. By doing so, we conclude that short wavelength reflecting blue flowers are indeed frequent in nature when considering the color vision and preferences of bees.
#science #plants #nature
 

Sleeping Octopuses May Have Dreams, But They're Probably Brief


#science #news #technology
 

Sleeping Octopuses May Have Dreams, But They're Probably Brief


#science #news #technology
 

Measuring shoreline retreat








Climate change is having an undeniable influence on coastal areas. A substantial proportion of the world’s sandy coastlines are already eroding owing to increased storm surges, flooding and sea level rise. With our coastal environments in constant change, Earth observation satellites are being used to better strengthen our knowledge of changing coastlines.

#news #space #science #esa #europeanspaceagency
posted by pod_feeder_v2
 

Measuring shoreline retreat








Climate change is having an undeniable influence on coastal areas. A substantial proportion of the world’s sandy coastlines are already eroding owing to increased storm surges, flooding and sea level rise. With our coastal environments in constant change, Earth observation satellites are being used to better strengthen our knowledge of changing coastlines.

#news #space #science #esa #europeanspaceagency
posted by pod_feeder_v2
 
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