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'NASA ready to take whatever Universe throws at us'_我的网站

A |     AI摘要      漳州城管局建立物业退出报备、交接指导及应急托管机制，避免小区失管。通过提前介入、细化交接清单、临时托管等方式，今年已完成22个小区更替，兜底服务125个小区，保障服务平稳衔接。         小区物业企业退出后，服务如何衔接，如何才能避免小区“无人管”？记者日前从漳州市城市管理局了解到，针对物业服务更替过程中可能出现的管理空档，该局提前介入、主动服务，建立物业退出报备、交接指导、应急托管机制，推动物业退出有序、服务承接平稳。    Washington, Oct 12 (UNI) American space agency NASA says its recent attempt to deflect the path of an asteroid was successful, after its Dart probe struck an asteroid head-on.
Scientists have now confirmed the orbit of a 160m-wide space rock known as Dimorphos was altered when the Dart probe struck it head on last month.
Researchers came to the conclusion after making measurements using a range of space and Earth-based telescopes.
The mission was conceived to test a potential strategy to defend the Earth against threatening objects.
Dart's achievement proves such an idea would work, provided it was initiated early enough and the target wasn't overly massive.
"This mission shows that Nasa is trying to be ready for whatever the Universe throws at us," said agency administrator Bill Nelson.
"I believe that Nasa has proven that we are serious as a defender of the planet," he told reporters.
The space agency released a raft of data on Tuesday to support its assessment, including new pictures from the Hubble Space Telescope and from a small Italian spacecraft that stood off from the impact by about 50km (30 miles).
The Double Asteroid Redirection Test (Dart) took place some 11 million km (7 million miles) from Earth.
It saw the refrigerator-sized Nasa satellite drive straight into Dimorphos at 22,000km/h (14,000mph), destroying itself in the process.
The space rock orbits a much larger (780m wide; 2,550ft) object called Didymos. Before impact, the time taken for Dimorphos to make one circuit of its sibling was 11 hours and 55 minutes.
The telescope evidence now indicates this orbital period has been reduced to 11 hours and 23 minutes - a change of 32 minutes. This corresponds to Dimorphos moving closer into to Didymos by "tens of metres".
Nasa had defined a minimum successful period change of Dimorphos of 73 seconds or more. The results released on Tuesday show Dart surpassed this benchmark by more than 25 times.
"This is a 4 percent change in the orbital period of Dimorphos around Didymos. Dart just gave it a small nudge. But if you wanted to do this in the future, you'd want to do it years in advance," commented Nancy Chabot from the Johns Hopkins University Applied Physics Laboratory, which led the mission for Nasa.
"Warning time is really key here in order to enable this sort of asteroid deflection to be used in the future as part of a much larger planetary defence strategy."
Nasa's Dart programme scientist, Tom Statler, also had a word of caution about drawing too many conclusions from the experiment.
Asteroids came in many different guises, he said. Their compositions and constructions were diverse - something that was being emphasised every time a mission visited a new object.
"We should not be too eager to say one test on one asteroid tells us exactly how every other asteroid would behave in a similar situation," he stressed.
"But what we can do is use this test as an anchor point for our physics calculations in our simulations that tell us how different kinds of impacts in different situations should behave."
Four years from now, the European Space Agency (Esa) will have three spacecraft - collectively known as the Hera mission - at Didymos and Dimorphos to make follow-up studies.
UNI ING。

B |     不久前，在龙文区某小区，原物业服务企业退出后，居民一度担心环境保洁、设施维护等日常管理受到影响。属地及时介入，指导社区、业主委员会和新旧物业开展沟通协调，按照人员、设施设备、公共收益、维修资料等交接清单逐项核对，推动新物业企业顺利进场。如今，该小区保洁、秩序维护、设施报修等服务已恢复正常，居民生活未受明显影响。

C |     这样的探索正在全市推进。据了解，市城管局已建立物业服务企业退出报备制度和动态台账，对可能出现失管风险的小区提前介入、分类研判，并指导物业行业协会发挥行业自律和桥梁纽带作用，协助推动物业服务企业规范退出、平稳交接。今年以来，累计摸排重点项目36个，督促完成交接方案20份。

D | 在物业更替过程中，属地指导街道社区、业主委员会和新旧物业同步衔接，细化人员、设施、账目、公共收益、维修资料等交接清单，已完成物业更替小区22个。对暂未选聘新物业的小区，通过临时托管、国企接管、社区代管等方式维持基本服务，累计指导兜底服务125个小区，化解交接纠纷5件。（漳州融媒记者 曾婷婷 通讯员 何娴）。

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