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時間:2022-08-16 來源:本站 點擊:258次

Rio Open set for February return******

RIO DE JANEIRO, Oct. 28 (Xinhua) -- The Rio Open, South America's only ATP 500 event, will return in 2022 after being canceled this year because of COVID-19, organizers said on Thursday.

The clay-court tournament will be played at the Jockey Club Brasileiro from February 12 to 20 in Rio de Janeiro's southern neighborhood of Gavea.

"We missed you a lot, but we're back. The return of the Rio Open is a great gift for the city of Rio de Janeiro," tournament director Marcia Casz said in a statement.

"The successful vaccination program gave us a desire to be back together again... safely, of course. We are preparing a Rio Open that will be the best of all," she added.

Previous Rio Open winners include Rafael Nadal, David Ferrer, Dominic Thiem and Diego Schwartzman.

The last edition in 2020 was won by Chile's Cristian Garin, who beat Gianluca Mager of Italy in the final 7-6, 7-5. Enditem



How the Tonga eruption is helping space scientists understand Mars

NASA scientists say that the eruption of a submarine volcano in Tonga is helping them to understand how features formed on the surfaces of Mars and Venus.


The unusual explosion — which has been calculated at more than 500 times the force of the atom bomb dropped on Hiroshima, Japan, in 1945 — is offering researchers a rare chance to study how water and lava interact.


Studying the Hunga Tonga–Hunga Haʻapai volcano and its evolution in recent weeks is “important for planetary science”, says Petr Brož, a planetary volcanologist at the Institute of Geophysics of the Czech Academy of Sciences in Prague.

布拉格捷克科学院地球物理研究所的行星火山学家Petr Brož说,研究洪阿哈阿帕伊岛火山及其最近几周的演化“对行星科学很重要”。

The knowledge “might help us to reveal results of water–lava interactions on the red planet and elsewhere across the Solar System”, he says.


Front-row seat


The volcanic island, which began to form from ash and lava expelled from an undersea volcano in early 2015, piqued the interest of researchers including James Garvin, chief scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, because of its similarity to structures on Mars and possibly also Venus. “We don’t normally get to see islands form,” explains Garvin, but this one offered “a front-row seat”.

这座火山岛于2015年初由海底火山喷出的火山灰和熔岩开始形成,这激起了美国宇航局戈达德航天飞行中心首席科学家詹姆斯·加文(James Garvin)等研究人员的兴趣,因为它与火星上的结构相似,也可能与金星上的结构相似。 “我们通常不会看到岛屿形成,”加文解释说,但这个火山岛提供了“前排座位”。

Volcanic islands typically last for just months before being eroded away. But Hunga Tonga–Hunga Haʻapai survived for years, allowing Garvin’s team to use satellite observations and seafloor surveys to study how such islands form, erode and persist1. The researchers wanted to use that knowledge to understand how small conical volcanoes found on Mars may have formed in the presence of water billions of years ago.


Submarine eruptions differ significantly from those that occur on land, and can produce different landforms, says Brož. The presence of large quantities of sea water can make the explosions more violent, while also rapidly cooling the lava and restricting the amount of gas emitted from it.


Many volcanoes on Mars are thought to have erupted with steady flows of lava, but some could have been explosive, like Hunga Tonga–Hunga Haʻapai, says Joseph Michalski, a planetary scientist at the University of Hong Kong.

“火星上的许多火山被认为是由稳定的熔岩流喷发而成。”香港大学的行星科学家约瑟夫·米哈尔斯基(Joseph Michalski)说,但有些火山可能是爆炸性的,比如洪阿哈阿帕伊岛火山。

The marine environment also mimics some aspects of the low-gravity settings on small planets such as Mars and “can shed unique light on Martian features that formed in lower gravity”, he adds.


Last weekend’s violent explosion was preceded by a series of small eruptions starting in December, which increased the size of the island. That excited Garvin’s team. The researchers were in the process of submitting a paper describing the island’s slow erosion and a theoretical model for what makes it so stable — but “then BOOM. We had to hit reset,” says Garvin.


Teams around the world are now monitoring the island using optical, radar and laser satellites to measure what is left. The International Space Station’s Global Ecosystem Dynamics Investigation instrument has also collected data, says Garvin.


The vast majority of the island is now gone, says Daniel Slayback, a geographer at the Goddard Space Flight Center, who has visited Hunga Tonga–Hunga Haʻapai. “It’s kind of shocking to see,” he says. “It’s pretty dramatic.”

戈达德太空飞行中心的地理学家Daniel Slayback曾访问过洪阿哈阿帕伊岛,现在该岛绝大多数地区已经消失。“看到这一点有点令人震惊。”他说,“这很戏剧性。”

Garvin is hopeful that the giant chamber of magma deep under Earth’s crust that formed Hunga Tonga–Hunga Haʻapai will eventually create another island for researchers to study. If that happens, “we’ll measure it, and describe it and build a story about it”.


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CBA Roundup: Shanghai routs Sichuan for 2nd straight CBA win******

ZHUJI, China, Oct. 20 (Xinhua) -- The Shanghai Sharks crushed the Sichuan Blue Whales 118-84 in the Chinese Basketball Association (CBA) here on Wednesday.

Jamaal Franklin had 22 points and 17 assists to lead six players in double figures for Shanghai. New signing Wang Zhelin scored 17 points and six rebounds.

Shanghai ran away from Sichuan with a dominant third quarter in which they outscored 39-15 to enter the fourth quarter ahead 96-60.

Sichuan committed 31 turnovers to allow Shanghai 20 steals. Chen Chen scored a game-high 27 points for Sichuan.

Also on Wednesday, Zhao Yanhao scored 29 points with six 3-pointers to help the Zhejiang Lions overwhelm the Nanjing Monkey Kings 108-90, snatching a 2nd straight win into new season.

Nanjing opened the game with an 8-0 run before Zhejiang bounced back to finish the first quarter 25-20. Zhao contributed 20 points from the bench to give Zhejiang a 57-43 lead at halftime.

Zhejiang built the margin to 21 points after three quarters and then never looked back. Enditem

2月15日起西安240路调整线路 取消六十二中学、狄寨两个站点******

上了年纪后忙着变美 才能忘记变老


2.轨迹公布!4名进返京人员感染 涉多趟列车及航班



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