Results 81 to 90 of about 22,622 (206)
UniverseSpacetime wormholes are evidently an essential component of the construction of a time machine. Within the context of general relativity, such objects require, for their formation, exotic matter—matter that violates at least one of the standard energy ...
Mengqi Lu, Jiayue Yang, Robert B. Mann
doaj +1 more source
Quantum Dynamics of Lorentzian Spacetime Foam
, 1993 A simple spacetime wormhole, which evolves classically from zero throat radius to a maximum value and recontracts, can be regarded as one possible mode of fluctuation in the microscopic ``spacetime foam'' first suggested by Wheeler.
C. W. Misner +35 more
core +1 more source
Advances in Materials Science and Engineering, Volume 2026, Issue 1, 2026.The mesoporous silica (MPS) modified with organic ligands has been effectively employed since last decade as a nonconventional, highly efficient, and selective adsorbent for the removing of heavy metal ions (HMIs) from their aqueous media. Therefore, this research paper is focused on reviewing various research works carried out on the use of ligand ...
Shah Hussain +6 more
wiley +1 more source
A non-gravitational wormhole [PDF]
Classical and Quantum Gravity, 2000 Using the effective metric formalism for photons in a nonlinear electromagnetic theory, we show that a certain field configuration in Born-Infeld electromagnetism in flat spacetime can be interpreted as an ultrastatic spherically symmetric wormhole. We also discuss some properties of the effective metric that are valid for any field configuration.
BALDOVIN, FULVIO +3 more
openaire +4 more sources
Wormhole solutions in deformed space-time
European Physical Journal C: Particles and FieldsWe construct and analyse wormhole solutions in quantised space-time. The field equations are constructed from the deformed wormhole metric in the proper reference frame using tetrads.
Harsha Sreekumar, E. Harikumar
doaj +1 more source
Traversable wormhole in the deformed Ho\v{r}ava-Lifshitz gravity
, 2011 Asymptotically flat wormhole solutions are found in the deformed Ho\v{r}ava-Lifshitz gravity. It turns out that higher curvature terms can not play the role of exotic matters which are crucial to form a traversable wormhole, and external exotic sources ...
E. M. Lifshitz +4 more
core +1 more source
Advanced Science, Volume 12, Issue 47, December 18, 2025.The hydrolysis rate matching strategy, crystallization rate matching strategy of the titanium and silicon sources, dissolution‐recrystallization strategy in the synthesis process can be designed to regulate the microenvironment of active centers to design TS‐1 enriched in Ti active species.
Yan Xue +9 more
wiley +1 more source
Real-Time Detection and Response to Wormhole and Sinkhole Attacks in Wireless Sensor Networks
TechnologiesWireless sensor networks have become a vital technology that is extensively applied across multiple industries, including agriculture, industrial operations, and smart cities, as well as residential smart homes and environmental monitoring systems ...
Tamara Zhukabayeva +5 more
doaj +1 more source
Interstellar Migration, the Population ‘Problem’ and the Climate Emergency
Critical Quarterly, Volume 68, Issue 1, Page 103-119, April 2026.
Anna Hartnell
wiley +1 more source
Gels for CO2 geo‐storage and conformance control: A systemic review of behavior and performance
Deep Underground Science and Engineering, Volume 4, Issue 4, Page 612-637, December 2025.This review provides a systemic evaluation of potential sealants used in CO2 subsurface storage practices. Critical analyses of how external factors like CO2, pH, brine salinity and hardness, rock mineralogy, pressure, temperature, and injectivity could affect the performance of different sealants are provided. Abstract Carbon capture and storage (CCS)
Funsho Afolabi +6 more
wiley +1 more source