Results 111 to 120 of about 62,947 (343)

Naked singularity resolution in cylindrical collapse

, 2006
In this paper, we study the gravitational collapse of null dust in the cylindrically symmetric spacetime. The naked singularity necessarily forms at the symmetry axis.
C. J. S. Clarke, K. S. Thorne, Ken-ichi Nakao, P. Joshi, R. Penrose, S. W. Hawking, T. Nakamura, T. A. Morgan, Yasunari Kurita   +8 more
core   +1 more source

Multimodal Locomotion in Insect‐Inspired Microrobots: A Review of Strategies for Aerial, Surface, Aquatic, and Interfacial Motion

Advanced Robotics Research, EarlyView.
This review identifies key design considerations for insect‐inspired microrobots capable of multimodal locomotion. To draw inspiration, biological and robotic strategies for moving in air, on water surfaces, and underwater are examined, along with approaches for crossing the air–water interface.
Mija Jovchevska, Kaushik Jayaram, Nicole Xu   +2 more
wiley   +1 more source

A characterization of the central shell-focusing singularity in spherical gravitational collapse

, 1999
We give a characterization of the central shell-focusing curvature singularity that can form in the spherical gravitational collapse of a bounded matter distribution obeying the dominant energy condition.
Christodoulou D, Hawking S W, Joshi P S, Joshi P S, Joshi P S, Joshi P S, Penrose R, Singh T P, Singh T P, Singh T P, Singh T P, Singh T P, Singh T P, T P Singh, Wald R M, Wald R M   +15 more
core   +1 more source

Autonomous Locomotion of Tensegrity Structure on Low‐Temperature Surfaces

Advanced Robotics Research, EarlyView.
A low‐temperature responsive tensegrity structure (LRTS) is constructed by integrating low‐responsive temperature liquid crystal elastomer (LCE) cables, nonresponsive cables, and stiff rods. The low phase transition temperature of LCE is achieved by introducing a new liquid crystal mesogen.
Changyue Liu, Kai Li, Tianyu Li, Zixuan Wang, Jiping Yang, Zhijian Wang   +5 more
wiley   +1 more source

Gravitational collapse and naked singularities

, 2004
Gravitational collapse is one of the most striking phenomena in gravitational physics. The cosmic censorship conjecture has provided strong motivation for researches in this field.
A M Abrahams, A Ori, B C Nolan, B J Carr, C Gundlach, C J S Clarke, C R Evans, C Vaz, D Christodoulou, D M Eardley, D W Neilsen, F C Mena, F Echeverria, G Lemaître, H Bondi, H Iguchi, H Iguchi, H Iguchi, J M Martin-Garcia, J M Martín-García, J R Oppenheimer, K S Thorne, M W Choptuik, P S Joshi, P S Joshi, PRCT Pereira, R C Tolman, R P A C Newman, R Penrose, R Penrose, S A Hayward, S Barve, S Jhingan, S L Shapiro, S S Deshingkar, S S Deshingkar, S W Hawking, T A Apostolatos, T Chiba, T Harada, T Harada, T Harada, T Harada, T Harada, T Harada, T Koike, T Nakamura, T P Singh, T Tanaka, Tomohiro Harada   +49 more
core   +1 more source

Quantitative blow-up estimates for spacelike singularities in gravitational-collapse cosmological spacetimes [PDF]

, 2022
Xinliang An, Haoyang Chen, Taoran He
openalex   +1 more source

Gait Analysis of Pak Biawak: A Necrobot Lizard Built using the Skeleton of an Asian Water Monitor (Varanus Salvator)

Advanced Robotics Research, EarlyView.
Pak Biawak, a necrobot, embodies an unusual fusion of biology and robotics. Designed to repurpose natural structures after death, it challenges conventional boundaries between nature and engineering. Its movements are precise yet unsettling, raising questions about sustainability, ethics, and the untapped potential of biointegrated machines.
Leo Foulds, Donan Satria Yudha, Parvez Alam   +2 more
wiley   +1 more source

Backpropagation Through Soft Body: Investigating Information Processing in Brain–Body Coupling Systems

Advanced Robotics Research, EarlyView.
This study explores how information processing is distributed between brains and bodies through a codesign approach. Using the “backpropagation through soft body” framework, brain–body coupling agents are developed and analyzed across several tasks in which output is generated through the agents’ physical dynamics.
Hiroki Tomioka, Katsuma Inoue, Yasuo Kuniyoshi, Kohei Nakajima   +3 more
wiley   +1 more source

Schrodinger formalism, black hole horizons and singularity behavior

, 2009
The Gauss-Codazzi method is used to discuss the gravitational collapse of a charged Reisner-Nordstr\"om domain wall. We solve the classical equations of motion of a thin charged shell moving under the influence of its own gravitational field and show ...
Greenwood, Eric, Stojkovic, Dejan, Wang, John E.   +2 more
core   +1 more source

(D-E)-dimensional brane worlds and de Rham distribution formalism: Singular split versus compactification, restrictions on scenario and revision of gravitational energy problem [PDF]

, 2000
Konstantin G. Zloshchastiev
openalex   +1 more source