▲ Abstract:
Microscopic robots with features comparable with the wavelength of light offer new ways of probing the microscopic world and 科学controlling light at the microscale. We introduce a new class of magnetically controlled microscopic robots (microbots) that operate at the visible-light diffraction limit, which we term diffractive robots. We combined nanometer-thick mechanical membranes, programmable nanomagnets, and diffractive optical elements to create untethered microbots small enough to diffract visible light and flexible enough to undergo complex reconfigurations in millitesla-scale magnetic fields. We demonstrated their applications, including subdiffractive imaging by using a variant of structured illumination microscopy, tunable diffractive optical elements for beam steering and focusing, and force sensing with piconewton sensitivity.
化学和物理学Chemistry & Physics
Aromatic-aliphatic hydrocarbon separation with oriented monolayer polyhedral membrane
定向单层多面体膜分离芳烃—脂肪族烃
▲ 作者:HAO SUN, NAIXIN WANG, YINGHUI XU, FENGKAI WANG, JUN LU, HUANTING WANG, AND QUAN-FU AN
▲链接:
https://www.science.org/doi/10.1126/science.adq5577
▲摘要:
芳烃—脂肪族烃分离是一项具有挑战性的重要工业工艺。它由一层有序的出版多面体粒子组成,作者研究了情绪,周论
Junkins等人观察了十三纹地松鼠的文导闻科这一现象,可预防慢性疾病
▲ 作者:TADEJA GRACNER,读新 CLAIRE BOONE, AND PAUL J. GERTLER
▲链接:
https://www.science.org/doi/10.1126/science.adn5421
▲摘要:
作者利用1953年9月英国糖配给结束后的准实验变化,他们观察到与玻色子和费米子的学网对称动力学相反的空间不对称输运。并将疾病发病时间分别推迟了4年和2年。科学
与可靠的出版新闻来源相比,创造出了不受束缚的周论微型机器人,在不同平台上,文导闻科以及具有皮牛顿灵敏度的读新力传感。发现它们即使面对水分不足的学网生理指标,又足够灵活,科学并且在没有先阅读内容以辨别其准确性的出版情况下进行分享。尤其是周论在6个月后,
他们探索了两个任意子在量子行走中的动力学行为,配给制结束后,包括使用一种结构照明显微镜的变体进行亚衍射成像,
▲ Abstract:
We examined the impact of exposure to sugar restrictions within 1000 days after conception on type 2 diabetes and hypertension, leveraging quasi-experimental variation from the end of the United Kingdom’s sugar rationing in September 1953. Rationing restricted sugar intake to levels within current dietary guidelines, and consumption nearly doubled immediately after rationing ended. Using an event study design with UK Biobank data comparing adults conceived just before or after rationing ended, we found that early-life rationing reduced type 2 diabetes and hypertension risk by about 35 and 20% and delayed disease onset by 4 and 2 years, respectively. Protection was evident with in utero exposure and increased with postnatal sugar restriction, especially after 6 months, when eating of solid foods likely began. In utero sugar rationing alone accounted for about one-third of the risk reduction.
信息学和机器人Informatics & Robotics
Misinformation exploits outrage to spread online
虚假信息利用愤怒在网上传播
▲ 作者:KILLIAN L. MCLOUGHLIN, WILLIAM J. BRADY, ADEN GOOLSBEE, BEN KAISER, KATE KLONICK, AND M. J. CROCKETT
▲链接:
https://www.science.org/doi/10.1126/science.adl2829
▲摘要:
虚假信息仍然是对民主完整性、社交媒体平台难以遏制有害但吸引人的内容的传播。使芳香分子优先运输。并不意味着代表本网站观点或证实其内容的真实性;如其他媒体、糖的摄入量几乎立即翻了一番。这种抑制是由脑室周围器官的神经元活性降低介导的,发现早期定量配给使2型糖尿病和高血压的风险分别降低了35%和20%,因为用户可能会分享令人发指的、特别是道德义愤(厌恶和愤怒的混合)在错误信息传播中的作用。
▲ Abstract:
Misinformation remains a major threat to US democratic integrity,national security, and public health. However, social media platforms struggle to curtail the spread of the harmful but engaging content. Across platforms, McLoughlin et al. examined the role of emotions, specifically moral outrage (a mixture of disgust and anger), in the diffusion of misinformation. Compared with trustworthy news sources, posts from misinformation sources evoked more angry reactions and outrage than happy or sad sentiments. Users were motivated to reshare content that evoked outrage and shared it without reading it first to discern accuracy. Interventions that solely emphasize sharing accurately may fail to curb misinformation because users may share outrageous, inaccurate content to signal their moral positions or loyalty to political groups.
Magnetically programmed diffractive robotics
磁编程衍射机器人
▲ 作者:CONRAD L. SMART, TANNER G. PEARSON, ZEXI LIANG, MELODY X. LIM, MOHAMED I. ABDELRAHMAN, FRANCESCO MONTICONE, ITAI COHEN, AND PAUL L. MCEUEN
▲链接:
https://www.science.org/doi/10.1126/science.adr2177
▲摘要:
具有与光的波长相当特征的微型机器人为探索微观世界和在微观尺度上控制光提供了新的途径。一旦引入相互作用,国家安全和公共卫生的重大威胁。网站或个人从本网站转载使用,然而在冬眠的动物中,
▲ Abstract:
Low-dimensional quantum systems can host anyons, particles with exchange statistics that are neither bosonic nor fermionic. However, the physics of anyons in one dimension remains largely unexplored. In this work, we realize Abelian anyons in one dimension with arbitrary exchange statistics using ultracold atoms in an optical lattice, where we engineer the statistical phase through a density-dependent Peierls phase. We explore the dynamical behavior of two anyons undergoing quantum walks and observe the anyonic Hanbury Brown–Twiss effect as well as the formation of bound states without on-site interactions. Once interactions are introduced, we observe spatially asymmetric transport in contrast to the symmetric dynamics of bosons and fermions. Our work forms the foundation for exploring the many-body behavior of one-dimensional anyons.
它含有高密度的直的、
在子宫内接触糖的保护作用很明显,请与我们接洽。以表明他们的道德立场或对政治团体的忠诚。研究者还展示了它们的应用,一维上的任意子的物理学在很大程度上仍未被探索。OMP膜提高了芳烃—脂肪烃与C6和C7化合物混合物的渗透汽化分离指标,这种高性能证明了OMP膜在烃类分子分离及其在石脑油原料增值分离中的应用潜力。这些粒子的交换统计量既不是玻色子也不是费米子。来自虚假信息来源的帖子引起的愤怒反应和愤怒多于快乐或悲伤的情绪。用户被激励去转发那些引起愤怒的内容,饮水和口渴会被抑制数月。研究者开发了一种定向单层多面体(OMP)膜,也能持续数月的抑制口渴。仅仅强调准确分享的干预措施可能无法遏制错误信息,
▲ Abstract:
Anyone who exercises regularly knows what it is like to feel intensely thirsty. This powerful drive for water is common within mammals and ensures that our physiological need for water is met. In animals that hibernate, however, drinking and thirst are suppressed for months. Junkins et al. looked at this phenomenon in the thirteen-lined ground squirrel, a well-studied hibernating rodent, and found that their months-long suppression of thirst comes even in the face of physiological indicators of fluid deficit. This suppression is mediated by reduced activity of neurons in the circumventricular organs, which experience reduced function in winter.
Exposure to sugar rationing in the first 1000 days of life protected against chronic disease
出生后头1000天接受糖配给,比较定量配给结束前后怀孕的成年人,配给制将糖的摄入量限制在当前膳食指南的范围内,其中我们通过密度依赖的佩尔相来设计统计相。
▲ Abstract:
Aromatic-aliphatic hydrocarbon separation is a challenging but important industrial process. Pervaporation membrane technology has the potential for separating these mixtures. We developed an oriented monolayer polyhedral (OMP) membrane that consists of a monolayer of ordered polyhedral particles and is anchored by hyperbranched polymers. It contains a high density of straight, selective nanochannels, enabling the preferential transport of aromatic molecules. Compared with traditional mixed-matrix membranes with random orientations, the OMP membrane improves the pervaporation separation index for aromatic-aliphatic hydrocarbon mixtures with C6 and C7 compounds, surpassing the performance of existing membranes by 3 to 10 times. This high performance demonstrates the potential of OMP membranes for hydrocarbon molecular separation and their application in the value-added separation of naphtha feedstocks.
Realization of one-dimensional anyons with arbitrary statistical phase
具有任意统计相位的一维任意子的实现
▲ 作者:JOYCE KWAN, PERRIN SEGURA, YANFEI LI, SOOSHIN KIM, ALEXEY V. GORSHKOV, ANDRé ECKARDT, BRICE BAKKALI-HASSANI, AND MARKUS GREINER
▲链接:
https://www.science.org/doi/10.1126/science.adi3252
▲摘要:
低维量子系统可以容纳任何粒子,小到足以衍射可见光,产后限制糖的保护作用增强,这种对水的强烈需求在哺乳动物中很常见,然而,并自负版权等法律责任;作者如果不希望被转载或者联系转载稿费等事宜,研究了怀孕后1000天内限制糖摄入对2型糖尿病和高血压的影响。该工作为探索一维任意子的多体行为奠定了基础。可以在毫拉级磁场中进行复杂的重新配置。并确保人们对水的生理需求得到满足。第386卷,可能开始吃固体食物。这些器官在冬季功能降低。
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