Libro de Visitas

Harryerype

12 Apr 2025 - 09:45 am

Broken spheres
Dyson died in 2020 before any of his spheres could be found — although they are just one of a dozen ideas that bear his name.
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“As a young scientist, Dyson showed that three competing quantum theories were actually the same theory — he summarily ended the competition,” said William Press, the Leslie Surginer Professor of Computer Science and Integrative Biology at the University of Texas at Austin. He was not involved in the study. “Later, he applied his genius to areas of astronomy, cosmology, the extraterrestrial realm, and also the very real problem of nuclear proliferation here on planet Earth. At the time of his death, he was recognized as a provocative and creative thinker.”

George Dyson also attested to his father’s fascination and comprehensive reach across disciplines.
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“Taking advantage of a short attention span and an aversion to bureaucracy, he contributed to five fields of mathematics and eleven fields of physics, as well as to theoretical biology, engineering, operations research, literature, and public affairs,” the younger Dyson said. “Many of his ideas were controversial, with one of his guiding principles being that ‘It is better to be wrong than to be vague.’”

The approach of the researchers behind the new study could offer a more fruitful path in the search for extraterrestrial intelligence, said Tomotsugu Goto, an associate professor of astronomy at the National Tsing Hua University in Taiwan. He also was not involved with the study.

“However, contamination by circumstellar debris disks, which mimic Dyson Sphere infrared signatures, remains a concern,” he added in an email. “Authors argue that the debris disks around (dwarf stars) are rare, but the 7 candidate authors selected out of 5 million sources are also rare. Despite this, the seven candidates warrant further investigation with powerful telescopes for a more definitive evaluation.”

Frankmussy

12 Apr 2025 - 08:56 am

‘Dyson spheres’ were theorized as a way to detect alien life. Scientists say they’ve found potential evidence
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What would be the ultimate solution to the energy problems of an advanced civilization? Renowned British American physicist Freeman Dyson theorized it would be a shell made up of mirrors or solar panels that completely surrounds a star — harnessing all the energy it produces.

“One should expect that, within a few thousand years of its entering the stage of industrial development, any intelligent species should be found occupying an artificial biosphere which completely surrounds its parent star,” wrote Dyson in a 1960 paper in which he first explained the concept
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If it sounds like science fiction, that’s because it is: Dyson took the idea from Olaf Stapledon’s 1937 novel “Star Maker,” and he was always open about that. The late scientist was a professor emeritus at the Institute of Advanced Study in Princeton, New Jersey.
Still, coming from a thinker who some in the scientific community say might have been worthy of a Nobel Prize early in his career, the concept took hold and the hypothetical megastructures became known as Dyson spheres, even though the physicist later clarified that they would actually consist of “a loose collection or swarm of objects traveling on independent orbits around the star.”

In his paper, Dyson also noted that Dyson spheres would give off waste heat detectable as infrared radiation, and suggested that looking for that byproduct would be a viable method for searching for extraterrestrial life. However, he added that infrared radiation by itself would not necessarily mean extraterrestrial intelligence, and that one of the strongest reasons for searching for such sources was that new types of natural astronomical objects might be discovered.

“Scientists (at the time) were largely receptive, not to the likelihood that alien civilisations would be found to exist, but that a search for waste heat would be a good place to look,” said George Dyson, a technology writer and author and the second of Dyson’s six children, via email. “Science fiction, from ‘Footfall’ to ‘Star Trek,’ took the idea and ran with it, while social critics adopted the Dyson sphere as a vehicle for questioning the wisdom of unlimited technological growth.”

Josephhaill

12 Apr 2025 - 08:52 am

Broken spheres
Dyson died in 2020 before any of his spheres could be found — although they are just one of a dozen ideas that bear his name.
kra31 at
“As a young scientist, Dyson showed that three competing quantum theories were actually the same theory — he summarily ended the competition,” said William Press, the Leslie Surginer Professor of Computer Science and Integrative Biology at the University of Texas at Austin. He was not involved in the study. “Later, he applied his genius to areas of astronomy, cosmology, the extraterrestrial realm, and also the very real problem of nuclear proliferation here on planet Earth. At the time of his death, he was recognized as a provocative and creative thinker.”

George Dyson also attested to his father’s fascination and comprehensive reach across disciplines.
https://kra30att.cc
kra31 at
“Taking advantage of a short attention span and an aversion to bureaucracy, he contributed to five fields of mathematics and eleven fields of physics, as well as to theoretical biology, engineering, operations research, literature, and public affairs,” the younger Dyson said. “Many of his ideas were controversial, with one of his guiding principles being that ‘It is better to be wrong than to be vague.’”

The approach of the researchers behind the new study could offer a more fruitful path in the search for extraterrestrial intelligence, said Tomotsugu Goto, an associate professor of astronomy at the National Tsing Hua University in Taiwan. He also was not involved with the study.

“However, contamination by circumstellar debris disks, which mimic Dyson Sphere infrared signatures, remains a concern,” he added in an email. “Authors argue that the debris disks around (dwarf stars) are rare, but the 7 candidate authors selected out of 5 million sources are also rare. Despite this, the seven candidates warrant further investigation with powerful telescopes for a more definitive evaluation.”

Scottriz

12 Apr 2025 - 08:43 am

Why axolotls seem to be everywhere — except in the one lake they call home
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Scientist Dr. Randal Voss gets the occasional reminder that he’s working with a kind of superstar. When he does outreach events with his laboratory, he encounters people who are keen to meet his research subjects: aquatic salamanders called axolotls.

The amphibians’ fans tell Voss that they know the animals from the internet, or from caricatures or stuffed animals, exclaiming, “‘They’re so adorable, we love them,’” said Voss, a professor of neuroscience at the University of Kentucky College of Medicine. “People are drawn to them.”
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Take one look at an axolotl, and it’s easy to see why it’s so popular. With their wide eyes, upturned mouths and pastel pink coloring, axolotls look cheerful and vaguely Muppet-like.

They’ve skyrocketed in pop culture fame, in part thanks to the addition of axolotls to the video game Minecraft in 2021. These unusual salamanders are now found everywhere from Girl Scout patches to hot water bottles. But there’s more to axolotls than meets the eye: Their story is one of scientific discovery, exploitation of the natural world, and the work to rebuild humans’ connection with nature.

A scientific mystery
Axolotl is a word from Nahuatl, the Indigenous Mexican language spoken by the Aztecs and an estimated 1.5 million people today. The animals are named for the Aztec god Xolotl, who was said to transform into a salamander. The original Nahuatl pronunciation is “AH-show-LOAT”; in English, “ACK-suh-LAHT-uhl” is commonly used.
Axolotls are members of a class of animals called amphibians, which also includes frogs. Amphibians lay their jelly-like eggs in water, and the eggs hatch into water-dwelling larval states. (In frogs, these larvae are called tadpoles.)

Most amphibians, once they reach adulthood, are able to move to land. Since they breathe, in part, by absorbing oxygen through their moist skin, they tend to stay near water.

Axolotls, however, never complete the metamorphosis to a land-dwelling adult form and spend their whole lives in the water.

“They maintain their juvenile look throughout the course of their life,” Voss said. “They’re teenagers, at least in appearance, until they die.”

Timothykip

12 Apr 2025 - 07:59 am

Why axolotls seem to be everywhere — except in the one lake they call home
kraken tor
Scientist Dr. Randal Voss gets the occasional reminder that he’s working with a kind of superstar. When he does outreach events with his laboratory, he encounters people who are keen to meet his research subjects: aquatic salamanders called axolotls.

The amphibians’ fans tell Voss that they know the animals from the internet, or from caricatures or stuffed animals, exclaiming, “‘They’re so adorable, we love them,’” said Voss, a professor of neuroscience at the University of Kentucky College of Medicine. “People are drawn to them.”
https://kra30s.cc
kra31cc

Take one look at an axolotl, and it’s easy to see why it’s so popular. With their wide eyes, upturned mouths and pastel pink coloring, axolotls look cheerful and vaguely Muppet-like.

They’ve skyrocketed in pop culture fame, in part thanks to the addition of axolotls to the video game Minecraft in 2021. These unusual salamanders are now found everywhere from Girl Scout patches to hot water bottles. But there’s more to axolotls than meets the eye: Their story is one of scientific discovery, exploitation of the natural world, and the work to rebuild humans’ connection with nature.

A scientific mystery
Axolotl is a word from Nahuatl, the Indigenous Mexican language spoken by the Aztecs and an estimated 1.5 million people today. The animals are named for the Aztec god Xolotl, who was said to transform into a salamander. The original Nahuatl pronunciation is “AH-show-LOAT”; in English, “ACK-suh-LAHT-uhl” is commonly used.
Axolotls are members of a class of animals called amphibians, which also includes frogs. Amphibians lay their jelly-like eggs in water, and the eggs hatch into water-dwelling larval states. (In frogs, these larvae are called tadpoles.)

Most amphibians, once they reach adulthood, are able to move to land. Since they breathe, in part, by absorbing oxygen through their moist skin, they tend to stay near water.

Axolotls, however, never complete the metamorphosis to a land-dwelling adult form and spend their whole lives in the water.

“They maintain their juvenile look throughout the course of their life,” Voss said. “They’re teenagers, at least in appearance, until they die.”

Dannyvus

12 Apr 2025 - 07:51 am

Broken spheres
Dyson died in 2020 before any of his spheres could be found — although they are just one of a dozen ideas that bear his name.
kra30at
“As a young scientist, Dyson showed that three competing quantum theories were actually the same theory — he summarily ended the competition,” said William Press, the Leslie Surginer Professor of Computer Science and Integrative Biology at the University of Texas at Austin. He was not involved in the study. “Later, he applied his genius to areas of astronomy, cosmology, the extraterrestrial realm, and also the very real problem of nuclear proliferation here on planet Earth. At the time of his death, he was recognized as a provocative and creative thinker.”

George Dyson also attested to his father’s fascination and comprehensive reach across disciplines.
https://kra30att.cc
kra30at
“Taking advantage of a short attention span and an aversion to bureaucracy, he contributed to five fields of mathematics and eleven fields of physics, as well as to theoretical biology, engineering, operations research, literature, and public affairs,” the younger Dyson said. “Many of his ideas were controversial, with one of his guiding principles being that ‘It is better to be wrong than to be vague.’”

The approach of the researchers behind the new study could offer a more fruitful path in the search for extraterrestrial intelligence, said Tomotsugu Goto, an associate professor of astronomy at the National Tsing Hua University in Taiwan. He also was not involved with the study.

“However, contamination by circumstellar debris disks, which mimic Dyson Sphere infrared signatures, remains a concern,” he added in an email. “Authors argue that the debris disks around (dwarf stars) are rare, but the 7 candidate authors selected out of 5 million sources are also rare. Despite this, the seven candidates warrant further investigation with powerful telescopes for a more definitive evaluation.”

Davidbig

12 Apr 2025 - 07:48 am

By Henry Austin
A Russian-American woman who was imprisoned for treason by Russia has been freed, Secretary of State Marco Rubio said Thursday.
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Former ballerina Ksenia Karelina was born in Russia but had built a new life as an aesthetician at a Los Angeles spa after immigrating to the United States over a decade ago. She “is on a plane back home to the United States,” having been “wrongfully detained by Russia for over a year,” Rubio said on in a post on X. He credited President Donald Trump with securing her release.
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Karolina’s lawyer, Mikhail Mushailov, confirmed her release in a statement on Instagram. “Two hours ago she was in touch with her relatives and took off from Abu Dhabi to the U.S.,” he wrote, adding that he had known about her release since Tuesday.
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Russia’s Federal Security Service (FSB) detained Karelina in January 2024 while she was visiting her parents and young sister in the city Yekaterinburg. It did not provide further details or evidence of her alleged crime.
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At the time, Russian legal group Perviy Otdel said it had information that Karelina had donated just over $51.80 from her U.S. bank account on Feb. 24, 2022 — the day that Russia launched its full-scale invasion of Ukraine — to a charity that sends aid to Ukraine. A spa where she had previously worked confirmed this in a statement on Facebook.

Although Russia’s FSB did not confirm that figure, it said Karelina’s donation “was subsequently used to purchase tactical medical supplies, equipment, weapons, and ammunition for the Ukrainian armed forces.”

She was sentenced in August to 12 years in a penal colony for “high treason,” having “fully admitted her guilt” at a closed trial in the southwestern Russian city of Yekaterinberg, Sverdlovsky Region Court said in a news release at the time.

The sentence came against the backdrop of Russia’s 3-year-long war with Ukraine during which President Vladimir Putin’s government has cracked down on dissent. Any perceived criticism of the military is banned.

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Jerryaride

12 Apr 2025 - 07:13 am

Моя мама, та ещё модница. Каждые выходные, её можно было найти в нашем Торговом Комплексе (ТК). Пропадая там часами и толком ничего не купив, за такое проведённое время, если только так по мелочи, у меня это вызывало недоумение. И тут же напрашивался, естественно закономерный вопрос. Что можно там делать, целый день?
Порно моделі
Конечно, я много раз навязывался на поход в ТК с мамой, объясняя разные причины, чтобы посетить, это «чудесное» заведение. Но каждый раз слышал, от неё только отказ.

Мама была у меня симпатичной женщиной с приличной грудью третьего размера, да и в меру обладая стройностью тела, выглядела в свои сорок лет, даже очень ничего. Многие мужчины, часто поглядывали в её сторону, на что мама строя им глазки, пыталась флиртовать с ними. Меня же это раздражало. Возможно во мне играла ревность, что не я центр её внимания.
Порно модели
Но странное поведение мамы, вынуждало меня узнать всё таки истинную причину, её не обычного влечения к шопомании.

Заранее купив новой одежды, чтобы не быть узнаным, и облачившись в эти шмотки, изменив облик, а на глаза нацепив солнцезащитные очки с бейсболкой, я решил проследить за мамой, когда она в очередной раз, пошла за покупками в ТК.
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Неотступно ступая ей в след, я добрался с ней до ТК. Не распознав меня, хотя я перед мамой часто светился, проверяя свою маскировку, мы вошли во внутрь этого грандиозного здания. По началу она и вправду ходила по бутикам, оглядываясь не редко на мужчин, а с некоторыми даже беседовала, но коротко, перекидываясь всего парой фраз. Я не слышал о чем они говорили, но по виду мужчин, можно сказать, что оппоненты очень были заинтересованы в этом разговоре.

Спустя час, её брожения по лабиринтам этих бутиков, она остановилась в одном из них и выбрав какую-то блузку, двинулась в сторону кабинки. Подойдя к ней, она оглянулась по сторонам и еще раз взглянув на номер над шторкой и убедившись, что именно в эту примерочную ей надо, мама не суетясь зашла туда.

Подумав, что здесь нет ничего необычного, я приметил молодого человека, с которым мама останавливалась и разговаривала. Он бродил по бутику и высматривал вещи, всё время поглядывая на кабинки. Выбрав что-то из одежды, он подошёл именно к той самой примерочной, куда некоторое время назад зашла моя мама. На вид парень был, чуть старше меня и испуганно взирая по сторонам, открыв штору кабинки, прошёл не задерживаясь во внутрь.

Я глазам своим не мог поверить, что это происходит. Разные мысли в голове, стали меня посещать и в основном они были интимного характера. Неужели моя мама, встречается с этим юнцом и в тайне от отца, изменяет ему, таким способом в примерочной кабинке ТК.

Да, да. У мамы был муж, который приходился мне отцом. Но у меня и в мыслях не было, что мама может так незатейливо, наставлять ему рога, посреди бела дня, да ещё при скоплении множества народа.

Мне стало любопытно, что же они там делают, и я подошёл к кабинке поближе. Стоя у шторы и прислушиваясь, я ничего не мог расслышать. Вокруг голдели люди и звуки сливались, теряясь в пространстве. Смирившись с этим, я отошёл в сторону якобы высматривая, что купить, но неизменно поглядывая в сторону примерочных. Тут неожиданно я увидел ещё пару человек, с которыми мама разговаривала. Они тоже ходили по магазинчику и что-то выбирали, косясь на кабинки с соответствующим номером. Вскоре со временем у примерочной скопилось более пяти человек. И они тупо озираясь друг на друга, не понимали, что вообще происходит. Некоторые примерочные были пусты, но никто в них не заходил из парней, ждавшие не понятно чего, как мне казалось.

И вот, этот парень, что был первый, быстро вылетев из кабинки, как ошпаренный, тут же помчался прочь, поправляя на ходу свои штаны. Я не понимал, что твориться здесь, смотря ему в след, как он удаляется. И пока у меня в голове это переваривалось, в кабинку прошмыгнул следующий из очереди, что стихийно образовалась у заманчивой для них примерочной.
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Wileyvog

12 Apr 2025 - 07:04 am

‘Dyson spheres’ were theorized as a way to detect alien life. Scientists say they’ve found potential evidence
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What would be the ultimate solution to the energy problems of an advanced civilization? Renowned British American physicist Freeman Dyson theorized it would be a shell made up of mirrors or solar panels that completely surrounds a star — harnessing all the energy it produces.

“One should expect that, within a few thousand years of its entering the stage of industrial development, any intelligent species should be found occupying an artificial biosphere which completely surrounds its parent star,” wrote Dyson in a 1960 paper in which he first explained the concept
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If it sounds like science fiction, that’s because it is: Dyson took the idea from Olaf Stapledon’s 1937 novel “Star Maker,” and he was always open about that. The late scientist was a professor emeritus at the Institute of Advanced Study in Princeton, New Jersey.
Still, coming from a thinker who some in the scientific community say might have been worthy of a Nobel Prize early in his career, the concept took hold and the hypothetical megastructures became known as Dyson spheres, even though the physicist later clarified that they would actually consist of “a loose collection or swarm of objects traveling on independent orbits around the star.”

In his paper, Dyson also noted that Dyson spheres would give off waste heat detectable as infrared radiation, and suggested that looking for that byproduct would be a viable method for searching for extraterrestrial life. However, he added that infrared radiation by itself would not necessarily mean extraterrestrial intelligence, and that one of the strongest reasons for searching for such sources was that new types of natural astronomical objects might be discovered.

“Scientists (at the time) were largely receptive, not to the likelihood that alien civilisations would be found to exist, but that a search for waste heat would be a good place to look,” said George Dyson, a technology writer and author and the second of Dyson’s six children, via email. “Science fiction, from ‘Footfall’ to ‘Star Trek,’ took the idea and ran with it, while social critics adopted the Dyson sphere as a vehicle for questioning the wisdom of unlimited technological growth.”

Henrywer

12 Apr 2025 - 06:31 am

Axolotl problems
As Mexico City grew and became more industrialized, the need for water brought pumps and pipes to the lake, and eventually, “it was like a bad, smelly pond with rotten water,” Zambrano said. “All of our aquatic animals suffer with bad water quality, but amphibians suffer more because they have to breathe with the skin.”
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To add to the axolotls’ problems, invasive fish species such as carp and tilapia were introduced to the lake, where they feed on axolotl eggs. And a 1985 earthquake in Mexico City displaced thousands of people, who found new homes in the area around the lake, further contributing to the destruction of the axolotls’ habitat.

These combined threats have devastated axolotl populations. According to the International Union for Conservation of Nature, there are fewer than 100 adult axolotls left in the wild. The species is considered critically endangered.
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While the wild axolotls of Lake Xochimilco have dwindled to near-extinction, countless axolotls have been bred for scientific laboratories and the pet trade. “The axolotl essentially helped establish the field of experimental zoology,” Voss said.

In 1864, a French army officer brought live axolotls back to Europe, where scientists were surprised to learn that the seemingly juvenile aquatic salamanders were capable of reproduction. Since then, scientists around the world have studied axolotls and their DNA to learn about the salamanders’ unusual metamorphosis (or lack thereof) as well as their ability to regrow injured body parts.
In addition to their role in labs, axolotls have become popular in the exotic pet trade (though they are illegal to own in California, Maine, New Jersey and Washington, DC). However, the axolotls you might find at a pet shop are different from their wild relatives in Lake Xochimilco. Most wild axolotls are a dark grayish brown. The famous pink axolotls, as well as other color variants such as white, blue, yellow and black, are genetic anomalies that are rare in the wild but selectively bred for in the pet trade.

What’s more, “most of the animals in the pet trade have a very small genetic variance,” Zambrano said. Pet axolotls tend to be inbred and lack the wide flow of different genes that makes up a healthy population in the wild. That means that the axolotl extinction crisis can’t simply be solved by dumping pet axolotls into Lake Xochimilco. (Plus, the pet axolotls likely wouldn’t fare well with the poor habitat conditions in the lake.)