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Go Beyond Earth: Understanding Human Actions and Scenes in Microgravity Environments
Get PDFDespite substantial progress in video understanding, most existing datasets are limited to Earth\u27s gravitational conditions. However, microgravity alters human motion, interactions, and visual semantics, revealing a critical gap for real-world vision systems. This presents a challenge for domain-robust video understanding in safety-critical space applications. To address this, we introduce MicroG-4M, the first benchmark for spatio-temporal and semantic understanding of human activities in microgravity. Constructed from real-world space missions and cinematic simulations, the dataset includes 4,759 clips covering 50 actions, 1,238 context-rich captions, and over 7,000 question-answer pairs on astronaut activities and scene understanding. MicroG-4M supports three core tasks: fine-grained multi-label action recognition, temporal video captioning, and visual question answering, enabling a comprehensive evaluation of both spatial localization and semantic reasoning in microgravity contexts. We establish baselines using state-of-the-art models. All data, annotations, and code are available at https://github.com/LEI-QI-233/HAR-in-Space
Meeting report: “An Amazon for workers? Visioneering alternatives for digitalized logistics work”. Workshop, 2025, Leipzig, DE
Get PDFDesign of a 75 km GW-class Hybrid Pipeline for the Synergetic Transmission of Liquid Hydrogen and Electrical Energy by High-Temperature Superconductivity
No full textThe transmission infrastructure for both electrical energy and hydrogen must be significantly expanded in Germany to enable climate neutrality. A hybrid pipeline can transmit both energy vectors simultaneously, efficiently, and compactly. Hybrid pipelines exploit the synergy provided by liquid hydrogen, which is used as a coolant and energy carrier, and high-temperature superconductors for the transmission of electrical energy. We present the conceptual design of a 75 km long GW-class hybrid pipeline for operation without intermediate cooling stations between Brunsbüttel and Hamburg in northern Germany. The design is based on a rare-earth barium copper oxide (REBCO) direct current cable and a thermally insulated rigid smooth pipe. We examine the electrical topology, cable build-up, cable behavior in the case of a short circuit, and the thermal-hydraulic design. The results lead to a hybrid pipeline with an outer diameter of less than 45 cm that can transmit 0.55 to 1.14 GWt of liquid hydrogen, and two parallel coaxial monopoles that transmit 4 GWe of electrical energy. Future research will build on the presented design to unveil the techno-economic competitiveness of this technology compared with conventional transmission alternatives
Validation of satellite precipitation estimates over the Western Cape region, South Africa
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Enhancement of Lithium-Ion Conductivity in Liquid Crystalline Block Copolymer Electrolyte by Electric Field Alignment
No full textMutation T9I in Envelope confers autophagy resistance to SARS-CoV-2 Omicron
No full textOmicron has emerged as the most successful variant of SARS-CoV-2. In addition to mutations in Spike that mediate humoral immune escape, the Omicron-specific Envelope (E) T9I mutation has been associated with increased transmission fitness. However, the underlying mechanism remained unclear. Here, we demonstrate that the E T9I mutation confers resistance to autophagy. Rare Omicron patient isolates encoding the ancestral E T9 remain sensitive to autophagy. Conversely, introducing the E T9I mutation in recombinant 2020 SARS-CoV-2 renders it resistant to autophagy. Our data indicate that the E T9I mutation protects virions against lysosomal degradation. At the molecular level, the T9I mutation increases the localization of E at autophagic vesicles and promotes interaction with autophagy-associated proteins SNX12, STX12, TMEM87B, and ABCG2. Our results show that the E T9I mutation renders incoming virions resistant to autophagy, suggesting that evasion of this antiviral mechanism contributes to the efficient spread of Omicron
