Results 21 to 30 of about 185,145 (291)
Comparing distance bounding protocols: A critical mission supported by decision theory [PDF]
Computer Communications, 2015 Distance bounding protocols are security countermeasures designed to thwart relay attacks. Such attacks consist in relaying messages exchanged between two parties, making them believe they communicate directly with each other. Although distance bounding protocols have existed since the early nineties, this research topic resurrected with the deployment
Gildas Avoine +2 more
openaire +3 more sources
Estimation of fretting fatigue life using a multiaxial stress-based critical distance methodology [PDF]
Fracture and Structural Integrity, 2015 This work presents a methodology for life estimation of mechanical couplings subjected to fretting fatigue. In this approach, a stress-based multiaxial fatigue parameter is evaluated at a critical distance below the contact surface.
F. C. Castro +3 more
doaj +3 more sources
THEORY OF CRITICAL DISTANCES AND THE THICKNESS OF THE SURFACE LAYER
, 2023 The theory of critical distances is based on the strength of materials L, which is given by its strength properties KIc and σ0. We have shown that the thickness of the surface layer R(I) is equal to the nanocrack length Lnm. We have shown that there is a relationship between L and Lnm: L = 104 Lnm = 104 R(I) ≈ 10-5 М/ρ.
Berdibekov A.T. +3 more
openaire +2 more sources
On the use of the theory of critical distances with mesh control for fretting fatigue lifetime assessment [PDF]
Tribology International, 2020 This work analyses the viability of the theory of critical distances (TCD) using mesh control for fretting fatigue lifetime assessment. More than seven hundred sets of simulations were performed by taking seventy different experimental tests reported previously in the literature.
Zabala, Alaitz +5 more
openaire +6 more sources
Quantum corrections in 4d N = 1 infinite distance limits and the weak gravity conjecture
Journal of High Energy Physics, 2021 We study quantum corrections in four-dimensional theories with N = 1 supersymmetry in the context of Quantum Gravity Conjectures. According to the Emergent String Conjecture, infinite distance limits in quantum gravity either lead to decompactification ...
Daniel Klaewer +3 more
doaj +1 more source
The Theory of Critical Distances applied to multiscale toughening mechanisms [PDF]
Engineering Fracture Mechanics, 2019 Abstract The Theory of Critical Distances (TCD) is an approach used for predicting the effect of cracks and notches on fracture and fatigue behaviour. In recent years it has been successfully applied to a wide range of problems across all classes of materials.
openaire +3 more sources
Nurses' Experiences of Distance Education Programmes
, 2013 Aim. This paper reports on a study exploring the experiences of nurses undertaking distance education (DE) programmes. Background. While DE has many advantages in terms of the flexibility, autonomy and freedom that it affords to learners, the ...
Hyde, Abbey, Murray, Maurice
core +1 more source
Static assessment of brittle/ductile notched materials: an engineering approach based on the Theory of Critical Distances [PDF]
Fracture and Structural Integrity, 2014 Engineering components often contain notches, keyways or other stress concentration features. These features raise the stress state in the vicinity of their apex which can lead to unexpected failure of the component.
R. Louks , H. Askes , L. Susmel
doaj +3 more sources
At the end of the world: Local Dynamical Cobordism
Journal of High Energy Physics, 2022 The Cobordism Conjecture states that any Quantum Gravity configuration admits, at topological level, a boundary ending spacetime. We study the dynamical realization of cobordism, as spacetime dependent solutions of Einstein gravity coupled to scalars ...
Roberta Angius +4 more
doaj +1 more source
The theory of critical distances applied to fracture of rocks with circular cavities
Theoretical and Applied Fracture Mechanics, 2022 This paper is part of the R&D project “Strain energy density in rock strength at different temperatures (EnergyRock)” (Ref.: PID2020-116138GB-I00) funded by MCIN/ AEI /10.13039/501100011033. The authors of this work would like to express their gratitude to the Department of Universities and Research, Environment and Social Policy of the Regional ...
Justo Urrutia, Jon +4 more
openaire +2 more sources