Libro de Visitas

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09 Apr 2025 - 06:47 pm

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09 Apr 2025 - 06:37 pm

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09 Apr 2025 - 05:50 pm

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Lloydcaumb

09 Apr 2025 - 05:41 pm

Tesla is bringing its electric cars to oil-rich Saudi Arabia amid falling global sales
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Tesla will start selling its electric vehicles in Saudi Arabia, entering the Gulf region’s largest economy as the company’s global sales are sliding and CEO Elon Musk courts controversy with his role in the US government.

The carmaker announced Wednesday that it would host a launch event in the kingdom on April 10, where it will showcase its EVs. Attendees will also have the chance to “experience the future of autonomous driving with Cybercab and meet Optimus, our humanoid robot, as we showcase what’s next in AI and robotics,” Tesla (TSLA) said.

Tesla may struggle to gain market share in oil-rich Saudi Arabia as EVs make up a little over 1% of all car sales in the country, according to a report by consultancy PwC published in September.
Tesla’s entry into the new market comes as the company fights battles on several fronts.

Last year, it recorded the first annual decline in sales in its history as a public company, posting a drop of 1%.

The company is facing intensifying competition in China, the world’s largest auto market. On Tuesday, BYD, a Chinese maker of electric and hybrid cars, reported $107 billion in annual sales for 2024, beating the near-$98 billion notched by Tesla.

And last week, BYD unveiled an ultra-fast charging system, which it said was capable of adding 250 miles (402 km) of range in just five minutes, easily outdoing Tesla’s charging technology. Tesla’s Superchargers take 15 minutes to charge an EV, providing a range of 200 miles.

Tesla has also suffered slumping sales in Europe. In February, the carmaker sold around 40% fewer vehicles on the continent compared with the same month in 2024, according to the European Automobile Manufacturers’ Association.

Chesterguild

09 Apr 2025 - 04:33 pm

Curiosity has maintained pristine pieces of the Cumberland sample in a “doggy bag” so that the team could have the rover revisit it later, even miles away from the site where it was collected. The team developed and tested innovative methods in its lab on Earth before sending messages to the rover to try experiments on the sample.
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In a quest to see whether amino acids, the building blocks of proteins, existed in the sample, the team instructed the rover to heat up the sample twice within SAM’s oven. When it measured the mass of the molecules released during heating, there weren’t any amino acids, but they found something entirely unexpected.

An intriguing detection
The team was surprised to detect small amounts of decane, undecane and dodecane, so it had to conduct a reverse experiment on Earth to determine whether these organic compounds were the remnants of the fatty acids undecanoic acid, dodecanoic acid and tridecanoic acid, respectively.

The scientists mixed undecanoic acid into a clay similar to what exists on Mars and heated it up in a way that mimicked conditions within SAM’s oven. The undecanoic acid released decane, just like what Curiosity detected.

Each fatty acid remnant detected by Curiosity was made with a long chain of 11 to 13 carbon atoms. Previous molecules detected on Mars were smaller, meaning their atomic weight was less than the molecules found in the new study, and simpler.
“It’s notable that non-biological processes typically make shorter fatty acids, with less than 12 carbons,” said study coauthor Dr. Amy Williams, associate professor of geology at the University of Florida and assistant director of the Astraeus Space Institute, in an email. “Larger and more complex molecules are likely what are required for an origin of life, if it ever occurred on Mars.”

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09 Apr 2025 - 04:27 pm

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Efrenmom

09 Apr 2025 - 03:20 pm

Americans nearing retirement and recent retirees said they were anxious and frustrated following a second day of market turmoil that hit their 401(k)s after President Donald Trump’s escalation of tariffs.

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As the impending tariffs shook the global economy Friday, people who were planning on their retirement accounts to carry them through their golden years said the economic chaos was hitting too close to home.
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Some said they are pausing big-ticket purchases and reconsidering home renovations, while others said they fear their quality of life will be adversely affected by all the turmoil.

“I’m just kind of stunned, and with so much money in the market, we just sort of have to hope we have enough time to recover,” said Paula, 68, a former occupational health professional in New Jersey who retired three years ago.

Paula, who spoke on the condition of anonymity because she feared retaliation for speaking out against Trump administration policies, said she was worried about what lies ahead.
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“What we’ve been doing is trying to enjoy the time that we have, but you want to be able to make it last,” Paula said Friday. “I have no confidence here.”

Trump fulfilled his campaign promise this week to unleash sweeping tariffs, including on the United States’ largest trading partners, in a move that has sparked fears of a global trade war. The decision sent the stock market spinning. On Friday afternoon, the broad-based S&P 500 closed down 6%, the tech-heavy Nasdaq dropped 5.8%, and the Dow Jones Industrial Average fell more than 2,200 points, or about 5.5%.

Johnnieunums

09 Apr 2025 - 02:38 pm

Curiosity rover makes ‘arguably the most exciting organic detection to date on Mars’
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The NASA Curiosity rover has detected the largest organic molecules found to date on Mars, opening a window into the red planet’s past. The newly detected compounds suggest complex organic chemistry may have occurred in the planet’s past — the kind necessary for the origin of life, according to new research.

The organic compounds, which include decane, undecane and dodecane, came to light after the rover analyzed a pulverized 3.7 billion-year-old rock sample using its onboard mini lab called SAM, short for Sample Analysis at Mars.

Scientists believe the long chains of molecules could be fragments of fatty acids, which are organic molecules that are chemical building blocks of life on Earth and help form cell membranes. But such compounds can also be formed without the presence of life, created when water interacts with minerals in hydrothermal vents.

The molecules cannot currently be confirmed as evidence of past life on the red planet, but they add to the growing list of compounds that robotic explorers have discovered on Mars in recent years. A study detailing the findings was published Monday in the journal Proceedings of the National Academy of Sciences.
The detection of the fragile molecules also encourages astrobiologists that if any biosignatures, or past signs of life, ever existed on Mars, they are likely still detectable despite the harsh solar radiation that has bombarded the planet for tens of millions of years.

“Ancient life, if it happened on Mars, it would have released some complex and fragile molecules,” said lead study author Dr. Caroline Freissinet, research scientist at the French National Centre for Scientific Research in the Laboratory for Atmospheres, Observations, and Space in Guyancourt, France. “And because now we know that Mars can preserve these complex and fragile molecules, it means that we could detect ancient life on Mars.”

Leonardnom

09 Apr 2025 - 02:37 pm

Everyone is talking about Greenland. Here’s what it’s like to visit
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A few months ago, Greenland was quietly getting on with winter, as the territory slid deeper into the darkness that envelops the world’s northerly reaches at this time of year.

But President Donald Trump’s musings about America taking over this island of 56,000 largely Inuit people, halfway between New York and Moscow, has seen Greenland shaken from its frozen Arctic anonymity.

Denmark, for whom Greenland is an autonomous crown dependency, has protested it’s not for sale. Officials in Greenland, meanwhile, have sought to assert the territory’s right to independence.

The conversation continues to intensify. A contentious March 28 visit to a US military installation by Usha Vance, the second lady, accompanied by her husband, Vice President JD Vance, was the latest in a series of events to focus attention on Trump’s ambitions for Greenland.

The visit was originally planned as a cultural exchange, but was shortened following complaints from Greenland Prime Minister Mute B. Egede.

Had the Vances prolonged their scheduled brief visit, they would’ve discovered a ruggedly pristine wildernesses steeped in rich Indigenous culture.

An inhospitable icecap several miles deep covers 80% of Greenland, forcing the Inuit to dwell along the shorelines in brightly painted communities. Here, they spend brutally cold winters hunting seals on ice under the northern lights in near perpetual darkness. Although these days, they can also rely on community stores.

The problem for travelers over the years has been getting to Greenland via time-consuming indirect flights. That’s changing. Late in 2024, the capital Nuuk opened a long-delayed international airport. From June 2025, United Airlines will be operating a twice-weekly direct service from Newark to Nuuk.

Two further international airports are due to open by 2026 — Qaqortoq in South Greenland and more significantly in Ilulissat, the island’s only real tourism hotspot.

Charlessnisp

09 Apr 2025 - 01:30 pm

Лазерная резка металла это современный и очень эфективный метод обработки металлов, который обширно употребляется в различных отраслях промышленных технологий. данный процесс основан на использовании лазерного луча для разрезания металла с высокой точностью и минимальным уровнем механических стрессов. Давайте подробнее рассмотрим основные аспекты лазерной резки.

Принцип работы

Лазерная резка основана на концентрации лазерного луча на определённой области металла. Когда интенсивность лазера достигает достаточного уровня, металл плавится либо испаряется, образуя рез. Существует несколько технологий лазерной резки, включая:
- CO2 лазеры употребляются для резки разных типов металлов, отличающихся высокой мощностью.
- Оптоволоконные лазеры более экономичные и действенные, то что надо для резки как тонких, так и толстых металлов [url=https://xn--80aad0aic5bcg6cq3g.xn--p1ai/2025/04/09/%d0%bb%d0%b0%d0%b7%d0%b5%d1%80%d0%bd%d0%b0%d1%8f-%d1%80%d0%b5%d0%b7%d0%ba%d0%b0-%d0%bc%d0%b5%d1%82%d0%b0%d0%bb%d0%bb%d0%b0/]лазерная резка металла[/url]

Достоинства лазерной резки

Лазерная резка имеет множество преимуществ в сравнении с традиционными способами:
- Высокая точность лазерная резка дает обеспечение точность до 0,1 мм, что дает возможность создавать сложные и детализированные формы.
- Минимальные термические деформации процесс резки минимизирует тепловое воздействие на материал, что снижает возможность деформаций.
- Универсальность лазер может отлично резать различные материалы, включая сталь, серебристый металл, медь и даже пластик.
- Автоматизация большинство моделей лазерных установок могут работать в автоматическом режиме, что повышает производительность и понижает затраты на рабочую силу.

Недостатки и ограничения

Несмотря на огромное количество преимуществ, лазерная резка имеет и свои ограничения:
- Стоимость оборудования лазерные установки могут требовать значимых капиталовложений.
- Ограниченная толщина резки для кое-каких материалов существуют ограничения по толщине, вне которых резка становится неэффективной.
- Потребление энергии лазерные установки употребляют значительное количество электроэнергии.

Применение лазерной резки

Лазерная резка применяется в разных сферах:
- Индустрия изготовка деталей автошины, станков, электроники.
- Строительство создание железных конструкций, металлических изделий.
- Декор создание интерьерных решений, художественных объектов, маркетинговых вывесок.

Заключение

Лазерная резка металла это высокотехнологичный процесс, который обеспечивает высшую точность и эффективность. Благодаря своим преимуществам, этот метод становится всё более пользующимся популярностью в различных отраслях. В момент выбора лазерной резки главно учитывать потребности вашего производства, типы обрабатываемых материалов и экономические нюансы.