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- Tunable Anti-Counterfeiting Material, Vision Impairment Tied to Higher Dementia Risk, Chinese Rocket Seen Falling on a Village
Tunable Anti-Counterfeiting Material, Vision Impairment Tied to Higher Dementia Risk, Chinese Rocket Seen Falling on a Village
Rob
June 25, 2024
🤖 Computer Science
Environmental changes can disrupt AI performance, causing failures or non-robust behaviors. AI systems must adapt to unexpected changes to solve complex problems. Three types of open-world learning (OWL) exist: weak, semi-strong, and strong. An ideal OWL system should be antifragile, improving through challenges. Evaluating OWL systems is challenging due to their need to handle the unexpected.
Benchmarking vision-based driving policies is difficult due to limitations in both open-loop and closed-loop evaluations. NAVSIM offers a solution by combining large datasets with a non-reactive simulator, enabling scalable real-world benchmarking. It collects metrics by simulating test scenes without policy-environment interaction, aligning better with closed-loop evaluations. NAVSIM's use in a CVPR 2024 competition revealed that simpler methods can match advanced architectures. The framework is modular and supports future challenges.
⚛️ Physics and Chemistry
Researchers from Western University have developed a new anti-counterfeiting material with multiple protection levels using persistent luminescence (PersL). This innovative approach makes identification markings harder to forge, addressing the limitations of existing luminescent markings. The study is published in ACS Applied Nano Materials.
Researchers in Germany and Slovenia have developed a versatile method for generating entangled photons using tunable liquid crystals. This new technique is more adaptable than traditional methods using solid crystals like lithium niobate. The reconfigurable nature of liquid crystals enhances applications in quantum sensing and other quantum physics fields.
Researchers have isolated a unique triradical aluminum complex with three radical dithiolene ligands in a quartet ground state. This discovery could impact the design of superconducting and single-molecule magnetic materials. Despite extensive study, radical forms of 1,2-dithiolene complexes are rare.
🧬 Biology & Medicine
Poor baseline vision and declining contrast sensitivity increase dementia risk in older adults. A longitudinal study of 2,159 participants found that worsening vision and contrast sensitivity were linked to higher dementia likelihoods, with contrast sensitivity showing a stronger correlation over time.
Researchers from Case Western Reserve University, Cleveland Clinic, and University Hospitals have received a $2.78 million NIH grant to use AI for better treating rectal cancer. The AI will analyze MRI scans to improve understanding of tumor response to therapy, addressing clinical evaluation challenges.
🔭 Space & Astronomy
Videos circulating online depict debris, possibly from China's Long March 2C rocket, falling over a populated area in southwest China. Residents are seen running for cover as a large cloud of dark yellow smoke trails across the sky. The rocket, launched on June 22 for a joint mission with France, experienced an apparent malfunction post-launch, leading to the dramatic scene captured on social media.
Chang'e 6 is returning to Earth with 4.4 pounds of lunar samples from the far side of the moon, expected to land in Inner Mongolia on June 25. Scientists are eager to study these samples to understand geological differences between the moon's two sides.
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