Results 121 to 130 of about 338,003 (249)

Analysis of charged compact stars by core-envelope model in f(R, T) gravity

Nuclear Physics B
In this manuscript, we explore two static and spherically symmetric, anisotropic, charged stars employing the formalism of modified f(R, T) gravity, where the gravitational Lagrangian is taken as f(R,T)=R+2γT. By introducing a core-envelope structure, we
A. Khalid, A. Zahra, Muhammad Bilal Riaz, S.A. Mardan, Rubab Manzoor   +4 more
doaj   +1 more source

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

Investigating wormhole structures in f(R,Lm) gravity: Implications for dark matter

Nuclear Physics B
This study rigorously examines the influence of dark matter within the framework of f(R,Lm) gravity, with a particular emphasis on its critical role in facilitating traversable wormhole solutions.
H Aruna Kumara, Chaitra Chooda Chalavadi, V. Venkatesha   +2 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

Embedding class-I traversable wormhole in f(T,T) gravity via Karmarkar condition

Nuclear Physics B
This article presents a traversable wormhole solution in extended teleparallel gravity, i.e., f(T,T) gravity showcasing the influence of prominent dark matter (DM) halos in such a structure by including energy densities of Universal Rotation Curve (URC),
Soubhik Paramanik, Krishna Pada Das, Ujjal Debnath   +2 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

Yukawa–Casimir wormholes in the framework of f(R) gravity

European Physical Journal C: Particles and Fields
In this article, we explore the Yukawa modification of the Casimir wormhole within the framework of f(R) gravity. To accomplish this, we adopt an approach proposed by Garattini (Eur Phys J C 81:824, 2021), wherein the original Casimir source is modified ...
V. Venkatesha, Chaitra Chooda Chalavadi, Adnan Malik   +2 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

Flat Friedmann-Lemaitre-Robertson-Walker Cosmological Model with Time-Dependent Cosmological Constant in Brans-Dicke Theory of Gravity

East European Journal of Physics
Recently, there has been much interest in investigating outstanding problems of cosmology with modified theories of gravity. The Brans-Dicke theory of gravity is one such theory developed by Brans and Dicke absorbing Mach’s principle into the General ...
Anindita Basumatary, Chandra Rekha Mahanta   +1 more
doaj   +1 more source

De Novo Design and Directed Evolution Refinement of Mirror‐Image Protein Binders Targeting Interleukin‐4

Advanced Science, EarlyView.
This study presents the de novo design and directed evolution of a mirror‐image D‐protein inhibitor targeting human interleukin‐4 (IL‐4). The engineered molecule exhibits nanomolar binding affinity for IL‐4 and effectively inhibits IL‐4–mediated signaling.
Liqing Xu, Yuxiang Ren, Tongyue Wang, Hongyong Li, Yue Yao, Lei Liu, Ke Sun, Peilong Lu   +7 more
wiley   +1 more source