Results 81 to 90 of about 21,587 (313)
Noncommutative quantum gravity [PDF]
Physics Letters B, 2000 The possible role of gravity in a noncommutative geometry is investigated. Due to the Moyal *-product of fields in noncommutative geometry, it is necessary to complexify the metric tensor of gravity. We first consider the possibility of a complex Hermitian, nonsymmetric $g_{ }$ and discuss the problems associated with such a theory.
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Ultra‐High Sensitivity, Wide‐Range Thermometry Based on High‐Quality Microscale Diamond Resonators
Advanced Materials, EarlyView.By combing high‐crystal quality single‐crystal diamond MEMS cantilevers with multi‐mode resonance, the groundbreaking microscale ultra‐high sensitivity ≈22 nK Hz−1/2 and resolution of 100 µK thermometry is achieved. The diamond MEMS thermometry can operate over a wide temperature range from 6.5 to 380 K. This work underscores diamond MEMS resonators as
Wen Zhao +5 more
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A DIALOG ON QUANTUM GRAVITY [PDF]
International Journal of Modern Physics D, 2003 The debate between loop quantum gravity and string theory is sometime lively, and it is hard to present an impartial view on the issue. Leaving any attempt to impartiality aside, I report here, instead, a conversation on this issue, overheard in the cafeteria of a Major American University.
Carlo Rovelli, Carlo Rovelli
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Free‐Standing Supramolecular Pyridine N‐Oxide‐Silver(I) Metallogels
Advanced Materials, EarlyView.A comprehensive analysis of pyridine N‐oxide‐silver(I) trifluoroacetate complexes reveals remarkable mechanical strengths that enable the creation of free‐standing objects with shape control, reaching dimensions of up to centimeters and shedding new insights into the gelation mechanisms.
Rakesh Puttreddy +8 more
wiley +1 more source
QUANTUM, GRAVITY AND GEOMETRY [PDF]
International Journal of Modern Physics A, 2000 Recently,1–3 it is shown that, the quantum effects of matter are well described by the conformal degree of freedom of the space–time metric. On the other hand, it is a well-known fact that according to Einstein's gravity theory, gravity and geometry are interconnected.
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Advanced Materials, EarlyView.Nanoscale metal–organic frameworks (MOFs) and nanocellulose composites have significant potential for the multi‐functional remediation of the environment. This review focused on the synthesis strategies (in situ growth, ex situ growth, and other approaches), typical forms (aerogel, hydrogel, beads, and membrane), and applications in the removal of ...
Ye Song +13 more
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, 2019 This article was originally called "Logical Basis of Natural Philosophy". 本文原名《自然哲学的逻辑基础》。
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Scaling in quantum gravity [PDF]
Nuclear Physics B, 1995 15 pages, Latex.
Ambjørn, Jan, Watabiki, Y.
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Thermally Actuated Soft Robotics
Advanced Materials, EarlyView.This review focuses on the recent development of thermally actuated soft robotics, highlighting the four major heating mechanisms, as well as structural designs, thermal management, material innovations, and emerging applications. A summary and outlook section present the current challenges of thermally actuated soft robots and the future directions to
Shuang Wu +2 more
wiley +1 more source
Advanced Materials, EarlyView.This study demonstrates enhanced induction heating in cobalt‐doped iron oxide nanoparticles via specific pre‐magnetization, induced by the pre‐alignment of magnetic moments. By correlating Co content with magnetic properties, the research highlights how magnetic pre‐programming enables localized, on‐demand debonding in composites.
Theodor Raczka +7 more
wiley +1 more source