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Victorcar

24 Jan 2025 - 09:30 pm

Scientists have identified an estimated 10% of all species on Earth. Here’s what they found in 2024
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A toothy toadstool. A vegetarian piranha with a distinctive mark. And a pygmy pipehorse floating in the Indian Ocean shallows.

These wild wonders were among the hundreds of previously unknown species of animals, plants and fungi that scientists named and described for the first time in 2024, expanding our surprisingly limited knowledge of Earth’s diversity.

“Scientists estimate that we’ve identified only one-tenth of all species on Earth,” said Dr.
Shannon Bennett, chief of science at the California Academy of Sciences, in a statement.

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“While it is critical to place protections on known threatened species, we must also allocate resources towards identifying unknown species that may be just as important to the functioning of an ecosystem,” Bennett said.

Researchers connected to the institution described 138 new species in 2024, including 32 fish. One standout was a pygmy pipehorse named Cylix nkosi. The seahorse relative was originally found in 2021 in the cool temperate waters surrounding the North Island of New Zealand, but the species described this year was discovered in the subtropical waters off South Africa, expanding the known range of this group to the Indian Ocean

“South African reefs present notoriously difficult diving conditions with rough weather and intense, choppy waves — we knew we only had one dive to find it,” underwater photographer and marine biologist Richard Smith said in a statement.
“This species is also quite cryptic, about the size of a golf tee, but luckily we spotted a female camouflaged against some sponges about a mile offshore on the sandy ocean floor.”

The researchers involved in describing the new species chose nkosi as its name. A reference to the local Zulu word for “chief,” the name reflects the species’ crown-like head shape and acknowledges South Africa’s KwaZulu-Natal province where it was found.

Josephgat

24 Jan 2025 - 09:25 pm

The survivors of recent crashes were sitting at the back of the plane. What does that tell us about airplane safety?
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Look at the photos of the two fatal air crashes of the last two weeks, and amid the horror and the anguish, one thought might come to mind for frequent flyers.

The old frequent-flyer adage is that sitting at the back of the plane is a safer place to be than at the front — and the wreckage of both Azerbaijan Airlines flight 8243 and Jeju Air flight 2216 seem to bear that out.
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The 29 survivors of the Azeri crash were all sitting at the back of the plane, which split into two, leaving the rear half largely intact. The sole survivors of the South Korean crash, meanwhile, were the two flight attendants in their jumpseats in the very tail of the plane.

So is that old adage — and the dark humor jokes about first and business class seats being good until there’s a problem with the plane — right after all?

In 2015, TIME Magazine reporters wrote that they had combed through the records of all US plane crashes with both fatalities and survivors from 1985 to 2000, and found in a meta-analysis that seats in the back third of the aircraft had a 32% fatality rate overall, compared with 38% in the front third and 39% in the middle third.

Even better, they found, were middle seats in that back third of the cabin, with a 28% fatality rate. The “worst” seats were aisles in the middle third of the aircraft, with a 44% fatality rate.
But does that still hold true in 2024?

According to aviation safety experts, it’s an old wives’ tale.

“There isn’t any data that shows a correlation of seating to survivability,” says Hassan Shahidi, president of the Flight Safety Foundation. “Every accident is different.”

“If we’re talking about a fatal crash, then there is almost no difference where one sits,” says Cheng-Lung Wu, associate professor at the School of Aviation of the University of New South Wales, Sydney.

Ed Galea, professor of fire safety engineering at London’s University of Greenwich, who has conducted landmark studies on plane crash evacuations, warns, “There is no magic safest seat.”

Harryren

24 Jan 2025 - 07:55 pm

Most plane crashes are ‘survivable’
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First, the good news. “The vast majority of aircraft accidents are survivable, and the majority of people in accidents survive,” says Galea. Since 1988, aircraft — and the seats inside them — must be built to withstand an impact of up to 16G, or g-force up to 16 times the force of gravity. That means, he says, that in most incidents, “it’s possible to survive the trauma of the impact of the crash.”

For instance, he classes the initial Jeju Air incident as survivable — an assumed bird strike, engine loss and belly landing on the runway, without functioning landing gear. “Had it not smashed into the concrete reinforced obstacle at the end of the runway, it’s quite possible the majority, if not everyone, could have survived,” he says.

The Azerbaijan Airlines crash, on the other hand, he classes as a non-survivable accident, and calls it a “miracle” that anyone made it out alive.
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Most aircraft involved in accidents, however, are not — as suspicion is growing over the Azerbaijan crash — shot out of the sky.

And with modern planes built to withstand impacts and slow the spread of fire, Galea puts the chances of surviving a “survivable” accident at at least 90%.

Instead, he says, what makes the difference between life and death in most modern accidents is how fast passengers can evacuate.

Aircraft today must show that they can be evacuated in 90 seconds in order to gain certification. But a theoretical evacuation — practiced with volunteers at the manufacturers’ premises — is very different from the reality of a panicked public onboard a jet that has just crash-landed.
Galea, an evacuation expert, has conducted research for the UK’s Civil Aviation Authority (CAA) looking at the most “survivable” seats on a plane. His landmark research, conducted over several years in the early 2000s, looked at how passengers and crew behaved during a post-crash evacuation, rather than looking at the crashes themselves. By compiling data from 1,917 passengers and 155 crew involved in 105 accidents from 1977 to 1999, his team created a database of human behavior around plane crashes.

His analysis of which exits passengers actually used “shattered many myths about aircraft evacuation,” he says. “Prior to my study, it was believed that passengers tend to use their boarding exit because it was the most familiar, and that passengers tend to go forward. My analysis of the data demonstrated that none of these myths were supported by the evidence.”

Eugenegat

24 Jan 2025 - 07:28 pm

The survivors of recent crashes were sitting at the back of the plane. What does that tell us about airplane safety?
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Look at the photos of the two fatal air crashes of the last two weeks, and amid the horror and the anguish, one thought might come to mind for frequent flyers.

The old frequent-flyer adage is that sitting at the back of the plane is a safer place to be than at the front — and the wreckage of both Azerbaijan Airlines flight 8243 and Jeju Air flight 2216 seem to bear that out.
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The 29 survivors of the Azeri crash were all sitting at the back of the plane, which split into two, leaving the rear half largely intact. The sole survivors of the South Korean crash, meanwhile, were the two flight attendants in their jumpseats in the very tail of the plane.

So is that old adage — and the dark humor jokes about first and business class seats being good until there’s a problem with the plane — right after all?

In 2015, TIME Magazine reporters wrote that they had combed through the records of all US plane crashes with both fatalities and survivors from 1985 to 2000, and found in a meta-analysis that seats in the back third of the aircraft had a 32% fatality rate overall, compared with 38% in the front third and 39% in the middle third.

Even better, they found, were middle seats in that back third of the cabin, with a 28% fatality rate. The “worst” seats were aisles in the middle third of the aircraft, with a 44% fatality rate.
But does that still hold true in 2024?

According to aviation safety experts, it’s an old wives’ tale.

“There isn’t any data that shows a correlation of seating to survivability,” says Hassan Shahidi, president of the Flight Safety Foundation. “Every accident is different.”

“If we’re talking about a fatal crash, then there is almost no difference where one sits,” says Cheng-Lung Wu, associate professor at the School of Aviation of the University of New South Wales, Sydney.

Ed Galea, professor of fire safety engineering at London’s University of Greenwich, who has conducted landmark studies on plane crash evacuations, warns, “There is no magic safest seat.”

Josephwaf

24 Jan 2025 - 07:26 pm

Scientists have identified an estimated 10% of all species on Earth. Here’s what they found in 2024
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A toothy toadstool. A vegetarian piranha with a distinctive mark. And a pygmy pipehorse floating in the Indian Ocean shallows.

These wild wonders were among the hundreds of previously unknown species of animals, plants and fungi that scientists named and described for the first time in 2024, expanding our surprisingly limited knowledge of Earth’s diversity.

“Scientists estimate that we’ve identified only one-tenth of all species on Earth,” said Dr.
Shannon Bennett, chief of science at the California Academy of Sciences, in a statement.

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“While it is critical to place protections on known threatened species, we must also allocate resources towards identifying unknown species that may be just as important to the functioning of an ecosystem,” Bennett said.

Researchers connected to the institution described 138 new species in 2024, including 32 fish. One standout was a pygmy pipehorse named Cylix nkosi. The seahorse relative was originally found in 2021 in the cool temperate waters surrounding the North Island of New Zealand, but the species described this year was discovered in the subtropical waters off South Africa, expanding the known range of this group to the Indian Ocean

“South African reefs present notoriously difficult diving conditions with rough weather and intense, choppy waves — we knew we only had one dive to find it,” underwater photographer and marine biologist Richard Smith said in a statement.
“This species is also quite cryptic, about the size of a golf tee, but luckily we spotted a female camouflaged against some sponges about a mile offshore on the sandy ocean floor.”

The researchers involved in describing the new species chose nkosi as its name. A reference to the local Zulu word for “chief,” the name reflects the species’ crown-like head shape and acknowledges South Africa’s KwaZulu-Natal province where it was found.

Ivorynen

24 Jan 2025 - 10:21 am

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Zhedazcixra

24 Jan 2025 - 07:32 am

Prozeduren für die Vibrationsdiagnose bei Pumpen

Die Vibrationsdiagnose ist ein wichtiger Schritt zur Erhaltung und Wartung von Maschinen, insbesondere von Pumpen. Die richtige Diagnose und Analyse von Vibrationen können auf Probleme im Betrieb hinweisen und ermöglichen eine rechtzeitige Behebung von Unregelmäßigkeiten. Hier sind die grundlegenden Schritte für die Vibrationsdiagnose bei Pumpen:



Vorbereitung der Ausrüstung

Es ist wichtig, die Vibrationsdämpfer senkrecht zur Rotationsachse des Rotors zu positionieren. Der Laser-Tachometer wird auf einem Magnetständer befestigt und auf das reflektierende Band gerichtet, das am Riemen befestigt ist. Schließen Sie die Sensoren an das Gerät an und verbinden Sie das Gerät über USB mit einem Laptop. Starten Sie die Balanset-Software und wählen Sie den Balanciermodus in zwei Ebenen.





Initiale Vibrationsmessung

Vor Beginn des Auswuchtens wird ein Testgewicht aufgehängt und dessen Gewicht und Radius gemessen. Starten Sie den Rotor und messen Sie das Anfangsniveau der Vibration, um Amplitude und Phase des anfänglichen Ungleichgewichts zu bestimmen.





Auswuchten in der ersten Ebene

Platzieren Sie das Testgewicht in der ersten Ebene des Auswuchtens entsprechend der Position des ersten Sensors. Starten Sie den Rotor zur Vibrationsmessung. Die Amplitude oder Phase sollte sich um mindestens 20% ändern, was darauf hinweist, dass das Ungleichgewicht teilweise korrigiert wurde.





Auswuchten in der zweiten Ebene

Verschieben Sie das Testgewicht in die zweite Ebene (wo der zweite Sensor installiert ist), starten Sie erneut den Rotor und führen Sie die Messung durch. Diese Daten helfen der Software, die genaue Position und das Gewicht der Ausgleichsgewichte zu berechnen.



Korrektur des Ungleichgewichts

Basierend auf den erhaltenen Daten schlägt die Balanset-Software Ausgleichsgewichte und deren Installationswinkel für beide Ebenen vor. Entfernen Sie das Testgewicht, bereiten Sie die Ausgleichsgewichte gemäß den Programmanweisungen vor und installieren Sie sie unter dem richtigen Winkel in Richtung der Rotordrehung von der ursprünglichen Position des Testgewichts.





Überprüfung und Abschluss des Auswuchtens

Starten Sie den Rotor zur finalen Überprüfung des Auswuchtens. Wenn die Vibration auf ein akzeptables Niveau gesunken ist, ist der Prozess abgeschlossen. Bei Bedarf wird die Software anzeigen, wo und wie viel zusätzliches Gewicht noch installiert werden muss.

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Montevox

23 Jan 2025 - 08:13 pm

Скупка икон: необыкновенности и аспекты

Скупка икон это процесс приобретения религиозных артефактов, который стал известным как посреди коллекционеров, так и среди людей, отыскивающих духовные предметы. Иконы имеют огромную историческую и культурную ценность, что делает их увлекательными при покупке.

Почему скупают иконы?

1. Историческая ценность: Почти многие иконы имеют многовековую историю и могут рассказать о событиях и традициях прошлых эпох.

2. Религиозное значение: Иконы почитаются как священные объекты, символизирующие связь между верующими и священным.

3. Вкладывательный потенциал: Редкие и древние иконы могут значительно увеличиться в стоимости со временем.

Как проходит скупка икон?

Скупка икон может проходить через различные каналы:

- Антикварные магазины: Спец магазины нередко занимаются скупкой и продажей икон.

- Аукционы: Иконы могут выставляться на аукционах, где они доступны для оценки профессиональными экспертами.

- Личные коллекционеры: Некоторые люди с желанием расширить свои коллекции могут обратиться к собственникам икон напрямую.

Что учитывать при приобретении?

1. Состояние икон: Проверка http://www.11ria.com/home.php?mod=space&uid=80728&do=profile на наличие повреждений, реставрационных работ либо подделок.

2. Происхождение: Важно знать историю иконы, чтоб избежать приобретения недавно созданных подделок.

3. Ценовая политика: Обследуйте рынок, чтобы осознать, сколько стоят сходственные иконы. Цены могут варьироваться в большой зависимости от возраста, состояния и религиозного значения.

Заключение

Скупка икон это не только лишь инвестиция, а также возможность сохранить часть культурного наследия. Главно подходить к этому процессу с тщательностью, беря во внимание все нюансы, чтоб сделать успешное приобретение.

Montevox

23 Jan 2025 - 04:36 pm

Скупка икон: необыкновенности и аспекты

Скупка икон это процесс приобретения религиозных артефактов, который стал популярным как посреди коллекционеров, так и среди людей, ищущих духовные предметы. Иконы имеют огромную историческую и культурную ценность, что делает их увлекательными для покупки.

Почему скупают иконы?

1. Историческая ценность: Многие иконы имеют многовековую историю и могут рассказать о событиях и традициях прошлых эпох.

2. Религиозное значение: Иконы почитаются как священные объекты, символизирующие связь между верующими и божественным.

3. Вкладывательный потенциал: Редкие и старинные иконы могут очень сильно увеличиться в цены со временем.

Как проходит скупка икон?

Скупка икон может проходить через различные каналы:

- Антикварные магазины: Специализированные магазины довольно частенько занимаются скупкой и продажей икон.

- Аукционы: Иконы могут выставляться на аукционах, где они доступны для оценки профессиональными знатоками.

- Приватные собиратели: Некие люди с желанием расширить свои коллекции могут приступать к обладателям икон напрямую.

Что учесть при покупке?

1. Состояние икон: Проверка http://fond-tura.ru/2022/10/04/2192/?unapproved=238304&moderation-hash=177b43abd127655c72f7659454555b48#comment-238304 на наличие повреждений, реставрационных работ либо подделок.

2. Происхождение: Принципиально знать историю иконы, чтобы избежать приобретения не так давно сделанных подделок.

3. Политика цен: Исследуйте рынок, чтобы понять, сколько стоят сходственные иконы. Цены могут варьироваться в зависимости от возраста, состояния и религиозного значения.

Заключение

Скупка икон это не только инвестиция, а также возможность сохранить часть культурного наследства. Принципиально подходить к этому процессу с тщательностью, учитывая все аспекты, чтобы сделать успешное приобретение.

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