Results 121 to 130 of about 24,685 (268)

Origami‐Inspired Structural Design for Aquatic‐Terrestrial Amphibious Robots

Advanced Robotics Research, EarlyView.
This work presents a lightweight amphibious origami robot actuated by a single shape memory alloy wire. A rigid foldable origami structure with displacement amplification enables efficient terrestrial crawling and aquatic swimming. The addition of fan‐shaped units allows controllable turning in both environments.
Weiqi Liu, Chunlong Wang, Xiaohang Sun, Hongwei Guo, Jiayao Ma, Yan Chen   +5 more
wiley   +1 more source

Thin accretion disks in f(R) modified gravity models

, 2008
We consider the basic physical properties of matter forming a thin accretion disc in the static and spherically symmetric space-time metric of the vacuum f(R) modified gravity models. The Lagrangian of the generalized gravity theory is also obtained in a
Harko, T, Pun, CSJ, Kovács, Z
core   +1 more source

Ricci Semi-Symmetric Robertson–Walker Spacetime in f(R)-Gravity

Mathematics
We investigated the properties of Ricci semi-symmetric Robertson–Walker spacetimes within the framework of f(R)-gravity theory. Initially, we established that Ricci semi-symmetric Robertson–Walker spacetimes are locally isometric to either Minkowski or ...
H. Aruna Kumara, Abdul Haseeb, V. Venkatesha, Mohd Bilal   +3 more
doaj   +1 more source

3D‐Printing Aided Rapid Prototyping of Pretensioned Tensegrity Structures for Robotic Applications

Advanced Robotics Research, EarlyView.
Printing, injection molding, and assembly (PMA) is a method for rapid prototyping mesoscale, topologically complex, and tensioned tensegrity structures. In combination with PMA method, two mold design strategies: modular mold and compact channel layout, enable efficiency and scalability for tensegrity fabrication.
Yi Sun, Jan Petrš, Omar Aloui, Dario Floreano   +3 more
wiley   +1 more source

Study of stable dark energy stars in Hořava–Lifshitz gravity

European Physical Journal C: Particles and Fields
We study the structure and basic physical properties of non-rotating dark energy stars in Hořava–Lifshitz (HL) gravity. The interior of proposed stellar structure is made of isotropic matter obeys extended Chaplygin gas EoS.
Krishna Pada Das, Ujjal Debnath
doaj   +1 more source

Wormhole thermodynamics in matter-geometry coupled theory: Implications of pseudo-isothermal profile and complexity factor

Nuclear Physics B
The objective of this article is to explore the existence of traversable wormholes possessing the pseudo-isothermal profile in modified f(R,T) gravity.
Tayyab Naseer, M. Sharif, Mona Faiza, Faisal Javed, Baiju Dayanandan, Khalifa Al Shaqsi   +5 more
doaj   +1 more source

Systematic Exploration of 3D Concrete Printing Parameters for Conformal Printing on Sloped Surfaces

Advanced Robotics Research, EarlyView.
A conformal slicing algorithm is developed for robotic 3D concrete printing (3DCP) on sloped surfaces as a first step toward printing slab‐on‐grade foundations on uneven terrain. Systematic experiments quantify the effects of nozzle speed, extrusion rate, and toolpath direction on filament dimension and stability.
Paniz Farrokhsiar, Benay Gursoy, Jose Pinto Duarte   +2 more
wiley   +1 more source

Modified

, 2012
A modified f(G) gravity model with coupling between matter and geometry is proposed, which is described by the product of the Lagrange density of the matter and an arbitrary function of the Gauss–Bonnet term.
Jian-Bo Lu, Wei-Li Han, Liang-Liang Lin, Yue-Yue Zhao, Ya-Bo Wu, Zhuo Zhang   +5 more
core   +1 more source

Effective matter sectors from modified entropies

European Physical Journal C: Particles and Fields
We present a general formalism linking modified entropy functions directly to a modified spacetime metric and, subsequently, to an effective matter sector of entropic origin.
Ankit Anand, Sahil Devdutt, Kimet Jusufi, Emmanuel N. Saridakis   +3 more
doaj   +1 more source

Cold Orthogonal Translation: A Psychrophilic Pyrrolysyl‐tRNA Synthetase Boosts Genetic Code Expansion in E. coli

Advanced Science, EarlyView.
ABSTRACT Orthogonal translation systems (OTSs) enable site‐specific incorporation of non‐canonical amino acids (ncAAs) and are central to genetic code expansion. Current engineering strategies typically rely on hyperstable aminoacyl tRNA synthetase (aaRS) scaffolds to tolerate destabilizing mutations required for substrate diversification.
Nikolaj G. Koch, Peter Goettig, Michael A. Nash, Juri Rappsilber, Nediljko Budisa   +4 more
wiley   +1 more source