Results 101 to 110 of about 1,040,988 (296)

The earth's gravity field recovery using the third invariant of the gravity gradient tensor from GOCE. [PDF]

Sci Rep, 2021
Cai L, Wan X, Hsu H, Ran J, Meng X, Luo Z, Zhou Z.   +6 more
europepmc   +1 more source

Non-perturbative 3d Lorentzian quantum gravity [PDF]

, 2001
We have recently introduced a discrete model of Lorentzian quantum gravity, given as a regularized non-perturbative state sum over simplicial Lorentzian spacetimes, each possessing a uniqueWick rotation to Euclidean signature.
Ambj¢rn, J., Ambjørn, J., Loll, Renate, Ambjörn, Jan, Jurkiewicz, J., Dep Natuurkunde, Ambjørn, Jan, Quantum Gravity, Strings and Elementary Particles, Ambjörn, J., Jurkiewicz, Jerzy, Loll, R., Universiteit Utrecht   +11 more
core   +2 more sources

Toward Pore‐Engineered 3D‐Printed Materials for Sorption Water Harvesting, Interfacial Evaporation, and Radiative Cooling

Advanced Materials, EarlyView.
Water harvesting, radiative cooling, and interfacial solar evaporation are fundamentally governed by coupled heat, mass, and light transport processes. These processes are mediated by pore architecture, including pore size, connectivity, and hierarchical organization.
Dejan J. Trajkovski, Higgins M. Wilson, Abdallah Y. M. Ali, Jiaxing Xu, Ruzhu Wang, Primož Poredoš   +5 more
wiley   +1 more source

A Multifunctional Ionograsper Enabling Ion‐Redistribution Proximity Sensing and Structural‐Reconfiguration‐Driven Bidirectional Actuation

Advanced Materials, EarlyView.
A solid‐state ionic actuator integrates sensing, actuation, and memory within one material. A brief UV pulse induces long‐lasting deformation via coupled network rearrangement, dehydration, and rehydration, while ionic redistribution enables self‐powered sensing, supporting multifunctional, energy‐efficient soft robotic functions without continuous ...
Yong Min Kim, Jin Han Kwon, Hyeon Woo Yang, Sungryong Kim, Gyeong Rok Lee, Hong Chul Moon   +5 more
wiley   +1 more source

Scale Factor Calibration for a Rotating Accelerometer Gravity Gradiometer

Sensors, 2018
Rotating Accelerometer Gravity Gradiometers (RAGGs) play a significant role in applications such as resource exploration and gravity aided navigation. Scale factor calibration is an essential procedure for RAGG instruments before being used.
Zhongguang Deng, Chenyuan Hu, Xiangqing Huang, Wenjie Wu, Fangjing Hu, Huafeng Liu, Liangcheng Tu   +6 more
doaj   +1 more source

Quantum astrometric observables II: time delay in linearized quantum gravity [PDF]

, 2013
A clock synchronization thought experiment is modeled by a diffeomorphism invariant "time delay" observable. In a sense, this observable probes the causal structure of the ambient Lorentzian spacetime. Thus, upon quantization, it is sensitive to the long
Sub String Theory Cosmology and ElemPart, Béatrice Bonga, Bonga, B., Khavkine, I., Khavkine, Igor, Quantum Gravity, Strings and Elementary Particles, Theoretical Physics, Bonga, Béatrice, Igor Khavkine   +8 more
core   +2 more sources

Microgels Enable iPSCs to Assemble, Expand, and Differentiate Into Organoids—From Sizable to High‐Throughput

Advanced Materials, EarlyView.
A chemically defined PEG‐based microgel platform enables scalable, reproducible production of three‐dimensional microgel‐iPSC constructs in multiple sizes. The system is compatible with high‐throughput automation and supports human iPSC expansion and differentiation within a single construct, including directed differentiation into cardiac organoids ...
Laura Klasen, Matthias Mork, Ramin Nasehi, Vasudha Turuvekere Krishnamurthy, Kira Zeevaert, Aaron Babendreyer, Jacopo Di Russo, Wolfgang Wagner, Laura De Laporte   +8 more
wiley   +1 more source

International Trade without CES: Estimating Translog Gravity [PDF]

This paper derives a micro-founded gravity equation in general equilibrium based on a translog demand system that allows for endogenous markups and substitution patterns across goods.
Dennis Novy
core  

Quantum Gravity: Has Spacetime Quantum Properties? [PDF]

, 2009
The conceptual incompatibility between General Relativity and Quantum Mechanics is generally seen as a sufficient motivation for the development of a theory of Quantum Gravity. If - so a typical argumentation - Quantum Mechanics gives a universally valid
Hedrich, Reiner
core  

Spacetime and the Philosophical Challenge of Quantum Gravity [PDF]

, 2001
We survey some philosophical aspects of the search for a quantum theory of gravity, emphasising how quantum gravity throws into doubt the treatment of spacetime common to the two `ingredient theories' (quantum theory and general relativity), as a 4 ...
Butterfield, Jeremy, Jeremy Butterfield, Christopher Isham, Isham, Chris   +3 more
core   +1 more source