Using sound waves to detect helium
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Updates every hour. Last Updated: 29-Dec-2025 20:11 ET (30-Dec-2025 01:11 GMT/UTC)
Space manipulators play an important role in the on-orbit services and planetary surface operation whose reliability is a key issue. In the extreme environment of space, space manipulators are susceptible to a variety of unknown disturbances. Since it is difficult for the manipulator to be repaired immediately, once it fails, it will mean that it cannot complete the mission as expected, which may cause serious losses and dangers. How to have a resilient guarantee, i.e., the manipulator’s ability to resiliently recover and continue to complete tasks, in failure or disturbance is the core capability of its future development. The motion planning unit is used as the computing terminal of the manipulator’s joint motion trajectory. Compared with traditional motion planning, learning-based motion planning has gradually become a hot spot in current research. However, no matter what kind of research ideas, the single robotic manipulator is studied as an independent agent, making it unable to provide sufficient flexibility under conditions such as external force disturbance, observation noise, and mechanical failure.
A supernova has been detected at an unprecedented cosmic distance. The explosion, designated SN in GRB 250314A, occurred when the universe was only about 730 million years old, placing it deep in the era of reionisation.
Acute sepsis alters how intravenous fluids and vasoactive drugs function in the body. Using a sheep model, researchers examined how sepsis affects the distribution of crystalloid fluids and the effectiveness of vasoactive drugs. Results showed that sepsis reduced urine output, weakened drug responses, and caused fluid to accumulate in the interstitial “third fluid space.” These findings highlight how sepsis disrupts normal fluid regulation, complicating effective fluid and drug management during treatment.