2023-12-23 15:40:49物质与能量
交互式屏幕的使用减少了孩子的睡眠时间

While screen time is generally known to affect sleep, new research suggests that interactive engagement, such as texting friends or playing video games, delays and reduces the time spent asleep to a greater extent than passive screen time, like watching t

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2023-12-23 15:40:46物质与能量
研究人员找到了在不熔化泡沫的情况下焊接金属泡沫的方法

Researchers at North Carolina State University have now identified a welding technique that can be used to join composite metal foam (CMF) components together without impairing the properties that make CMF desirable. CMFs hold promise for a wide array of

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2023-12-23 15:40:44物质与能量
回收剩余纸板制成新型泡沫包装

With the holiday season in full swing, gifts of all shapes and sizes are being shipped around the world. But all that packaging generates lots of waste, including cardboard boxes and plastic-based foam cushioning, such as Styrofoam™. Rather than dis

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2023-12-23 15:40:41物质与能量
下一代蓝光可能会促进或阻碍睡眠

Blue light from LED lamps and consumer electronics can mess with your sleep because it disrupts production of the natural sleep hormone melatonin. Tinted glasses or displays in night mode can mask, but don't remove, a portion of the disruptive wavelength

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2023-12-23 15:40:38物质与能量
一对很有希望的搭档:科学家为量子科学展示了新的材料组合

Quantum information scientists are always on the hunt for winning combinations of materials, materials that can be manipulated at the molecular level to reliably store and transmit information.

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2023-12-23 15:40:35物质与能量
无人机捕捉到了水如何随着时间的推移塑造山脉的新线索

Drones flying along miles of rivers in the steep, mountainous terrain of central Taiwan and mapping the rock properties have revealed new clues about how water helps shape mountains over geological time, according to a team led by Penn State scientists.

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2023-11-21 13:17:22物质与能量
伴随着前所未有的耀斑,恒星尸体显示出生命迹象

After a distant star's explosive death, an active stellar corpse was the likely source of repeated energetic flares observed over several months -- a phenomenon astronomers had never seen before, a Cornell-led team reports in new research published Nov.

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2023-11-21 13:17:22物质与能量
詹姆斯·韦伯太空望远镜探测到附近系外行星大气层中的水蒸气、二氧化硫和沙云

A team of European astronomers, co-led by researchers from the Institute of Astronomy, KU Leuven, used recent observations made with the James Webb Space Telescope to study the atmosphere of the nearby exoplanet WASP-107b. Peering deep into the fluffy atm

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2023-11-21 13:17:21物质与能量
水生鳄鱼的多种进化轨迹

In the geological past, several groups of crocodiles evolved towards a morphology adapted to marine life. However, the extent of these adaptations and their evolutionary trajectories remained unknown. An exhaustive study of their morphology by a scientifi

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2023-11-21 13:17:20物质与能量
恐龙灭绝后幸存的植物从空气中提取氮气

Once a favored food of grazing dinosaurs, an ancient lineage of plants called cycads helped sustain these and other prehistoric animals during the Mesozoic Era, starting 252 million years ago, by being plentiful in the forest understory. Today, just a few

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2023-11-21 13:17:20物质与能量
澳大利亚轨迹显示,白垩纪早期,鸟类在南极附近活动

The discovery of 27 avian footprints on the southern Australia coast -- dating back to the Early Cretaceous when Australia was still connected to Antarctica -- opens another window onto early avian evolution and possible migratory behavior.

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2023-11-21 13:17:19物质与能量
仅从音频片段和个人照片中创建的逼真的会说话的面孔

A team of researchers from Nanyang Technological University, Singapore (NTU Singapore) has developed a computer program that creates realistic videos that reflect the facial expressions and head movements of the person speaking, only requiring an audio cl

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