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😊 Physics-Enhanced Multi-fidelity Learning for Optical Surface Imprint. (arXiv:2311.10278v1 [cs.LG])

science

Human fingerprints serve as one unique and powerful characteristic for each person, from which policemen can recognize the identity. Similar to humans, many natural bodies and intrinsic mechanical qualities can also be uniquely identified from surface characteristics. To measure the elasto-plastic properties of one material, one formally sharp indenter is pushed into the measured body under constant force and retracted, leaving a unique residual imprint of the minute size from several micrometers to nanometers. However, one great challenge is how to map the optical image of this residual imprint into the real wanted mechanical properties, i.e., the tensile force curve. In this paper, we propose a novel method to use multi-fidelity neural networks (MFNN) to solve this ...

arXiv     Nov 20, 2023

The flat Fens of eastern England once held vast woodlands, study finds - Phys.org

The flat Fens of eastern England once held vast woodlands, study finds.org

Phys     Nov 24, 2023

Navigating technology, innovation and partnerships for the future of African Media

In the dynamic landscape of African media, the Africa Business Media Innovators (ABMI) Forum has emerged as a pivotal hub for shaping the industry's trajectory. From its inception in 2015, this gathering of influential minds has navigated the disruptive currents of technology, mobile innovation, and economic diversity. In an exclusive interview, Bloomberg Media Chief Executive Officer Scott Havens delves into the evolving nuances, discussing the impact of new technologies, the convergence of mobile and media, and strategies for sustainable business models. This narrative encapsulates not only the challenges but also the palpable optimism propelling Africa's media into an innovative and impactful future.

standardmedia.co.ke     Nov 21, 2023

Fitch Affirms All Ratings on Preferred Shares of 11 Invesco CEFs - Fitch Ratings

Fitch Ratings - New York - 22 Nov 2023: Fitch Ratings has affirmed the long-term ratings assigned to the Variable Rate MuniFund Term Preferred Shares (VMTP shares) issued by nine municipal closed-end funds managed by Invesco Advisers, Inc. at 'AA'.In addition, Fitch has affirmed the 'A' long-term ratings on the VMTP shares of Invesco Municipal Income Opportunities Trust (OIA) and the Series W-7 Variable Rate Demand Preferred Shares (VRDP shares) issued by Invesco Senior Income Trust (VVR). The VVR VRDP shares' short-term rating has been affirmed at 'F1'.

fitchratings.com     Nov 22, 2023

Twitter's Former Head of Trust and Safety Finally Breaks Her Silence - WIRED

tech

This time she’s sending a screenshot of tense tweets exchanged between the supreme leader of a nation-state and the official Twitter account of a rival nation-state. I respond with a prompt: “Let’s say you’re still at Twitter. How would you handle?” Harvey walks me through her decisionmaking process, then turns the tables: “What would YOU do?” I ask her whether I can sleep on it. She tells me I do not get the luxury of sleeping on it. No matter which call I make, people will despise me for it. And no matter what the outcome is, people could die. “You have to live with making the least bad decision you can with the resources you have,” ...

Wired     Nov 21, 2023