一。新闻简报。
1。在有报道称美国政府正准备向乌克兰发送远程系统后，拜登总统周一表示，美国不会向乌克兰发送可能到达俄罗斯的火箭系统。
2。据《南华早报》报道，中国核当局在地球以下浅层发现了丰富的铀矿床。这一发现被称为中国国家安全的突破，也可能改变科学界对铀形成的理解，为全球铀探测提供新途径。
3。据巴西民防组织称，由于倾盆大雨引发洪水和山体滑坡，至少有 91 人丧生，巴西东北部伯南布哥州的居民正准备迎接更多天的大雨。民防在推特上说，还有26 人据报失踪。
4。一项为期七年的研究项目结果表明，可能有一种新方法可以治疗成人中最常见和最具破坏性的脑癌之一，多形性胶质母细胞瘤 (GBM)。在 BMC Cancer 上发表的一项同行评议研究中，萨里大学的科学家证明，短链氨基酸（HTL-001 肽）可有效靶向和抑制导致多形性胶质母细胞瘤的基因家族的功能。 该研究是在细胞和动物中进行的。
5。台北，5 月 30 日（路透社）——台湾周一报道了自1 月以来中国空军在其防空区进行的最大规模入侵。台湾国防部表示，在最近紧张局势升级的情况下，台湾战斗警告 了30 架中国飞机撤离。
6。由医学博士 Kai Wucherpfennig 领导的 Wyss 研究所和 Dana-Farber 癌症研究所 (DFCI) 的科学家团队。已经开发出一种新的癌症疫苗，通过诱导身体产生针对“杀死我”蛋白质的抗体来靶向这一过程。 这种方法有效地将它们锁定在癌细胞表面，防止细胞破坏它们。 这反过来又使它们可以触发 T 细胞和 NK 细胞的杀伤反应。
7。周一下午，英国一场地震震动了中部地区的部分地区。斯塔福德郡和什罗普郡的居民报告说感到震颤，有人说他们的房子左右摇晃。英国地质调查局 (BGS) 检测到震级为 3.8 级的地下 8 公里处的地震——这是英国数月来最强的一次。
8。由加州大学圣地亚哥分校医学院的科学家领导的一个国际研究小组报告说，一种抑制靶向神经细胞信号传导的基因疗法有效地减轻了脊髓或周围神经损伤小鼠的神经性疼痛，并且没有可检测到的副作用。
9。菲律宾海岸警卫队负责人周五表示，菲律宾已经安装了浮标并开设了一些指挥所，以标出并维护其在有争议的南中国海声称拥有主权的水域和岛屿的主权。
10。在其下一代星际飞船火箭的首次轨道发射延迟数月之后，SpaceX 希望本周能从美国联邦航空管理局(FAA) 那里获得好消息。即希望美国联邦航空局最终完成其长期的环境审查——称为计划环境评估 (PEA)——这将确定星际飞船的首次轨道试飞是否可以在 SpaceX 位于得克萨斯州博卡奇卡的星际基地发射设施进行 。
11。麻省理工学院的一组研究人员声称，实验室制造的木材可以取代由真木制成的产品。 他们开发了一种技术，可以生产任何形状和大小的木材，例如，如果您需要一把新的木椅，使用研究人员的技术，您可以在实验室中创建它，而无需砍伐一棵树。
12。加拿大飞机制造商庞巴迪（Bombardier）推出了全球 8000 型飞机，这是一款最高运行速度为每小时721 英里的新飞机——使其成为世界上最快的私人飞机。
13。周一，十个太平洋岛国拒绝了中国推动达成一项范围广泛的区域安全协议，担心该提议旨在将它们拉入北京的轨道。中国外交部长王毅与小岛国领导人在斐济的会谈未能达成协议。
14。台湾外交部表示，由伊利诺伊州民主党参议员塔米·达克沃斯率领的美国代表团周一抵达台北，此前未宣布访问。台湾总统发言人张泽维尔说，代表团将于周二会见台湾总统蔡英文，他们将讨论“地区安全、经贸合作以及与美台双边关系有关的所有问题”。
15。中国即将将三名宇航员送入太空，住在中国仍在建设中的天宫空间站。据中国官方媒体 CGTN 报道，此次发射原定于 6 月的某个时间进行，但周日中国已将把宇航员送入太空的火箭安置在戈壁沙漠酒泉卫星发射中心的发射台。
二．美国疫情
昨日美国新增新冠患者4,288人
总确诊人数为83,984,644人。
新增死亡人数7人。
总死亡 1,004,733人。
康州新增新冠感染_人，新增死_人。
纽约州新增新冠确诊人数_人。新增死亡人数_人。
新泽西州昨天新增病例为_人。新增死亡为_人。
马萨诸塞州新增新冠患者为_人, 死亡_人。
马里兰州昨日新增新冠患者_人。新增死亡人数为_人。
三。世界疫情
1） 亚洲疫情：
昨日印度新增新冠患者2,706人；
日本新增20,698人；
印尼新增242人；
菲律宾新增199人；
土耳其新增864人。
台湾昨日新增__.
韩国昨日新增_人,
中国新增3,173人。
2）非洲疫情：
南非昨日新增新冠患者1,774人。
3）拉美疫情：
巴西昨日新增新冠患者8,195人.
哥伦比亚新增0人。
智利新增8,656人。
墨西哥新增_人。
4）欧洲疫情
俄罗斯昨日新增新冠患者4,118人。
德国新增755人。
法国新增16,440人。
英国新增5人。
意大利新增15,136人。
5）全球新冠总感染人数为529,271,185人。
总死亡人数为6,288,760人。
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A job for the Webb space telescope
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“We got 53 candidates for anomalies that cannot be well explained, but can’t say that all of them are Dyson sphere candidates, because that’s not what we are specifically looking for,” said Gabriella Contardo, a postdoctoral research fellow at the International School for Advanced Studies in Trieste, Italy, who led the earlier study. She added that she plans to check the candidates against Suazo’s model to see how many tie into it.
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“You need to eliminate all other hypotheses and explanations before saying that they could be a Dyson sphere,” she added. “To do so you need to also rule out that it’s not some kind of debris disk, or some kind of planetary collision, and that also pushes the science forward in other fields of astronomy — so it’s a win-win.”
Both Contardo and Suazo agree that more research is needed on the data, and that ultimately they could turn to NASA’s James Webb Space Telescope for more information, as it is powerful enough to observe the candidate stars directly. However, because of the lengthy, competitive procedures that regulate use of the telescope, securing access might take some time.
If Dyson spheres really exist, what could they be used for? “If you picture ourselves having as much energy as the sun is providing every second, we could do unheard of things,” Suazo said. “We could do interstellar travel, maybe we could even move the entire solar system to our preferred location, if we wanted.”
But don’t hold your breath, because the technology and the raw materials required to build the hypothetical structures are far beyond humanity’s grasp.
“They are so big that everything we have on Earth would not be enough to build them,” Suazo added. “Freeman Dyson said that we should dismantle Jupiter — the whole planet (for the raw materials).”
That supercolossal scale probably means that Dyson spheres, if they exist at all, are very rare.
‘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.”
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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.”
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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.”