Results 101 to 110 of about 315,378 (316)

Elastic Knots

open access: yesPhysical Review Letters, 2007
We study the mechanical response of elastic rods bent into open knots, focusing on the case of trefoil and cinquefoil topologies. The limit of a weak applied tensile force is studied both analytically and experimentally: the Kirchhoff equations with self-contact are solved by means of matched asymptotic expansions; predictions on both the geometrical ...
Audoly, Basile   +2 more
openaire   +3 more sources

Fatigue Crack Initiation and Growth in Nanocrystalline Ni at Multiple Length‐Scales

open access: yesAdvanced Engineering Materials, EarlyView.
Overview of miniaturized in situ SEM fatigue setup and resultant fatigue crack growth data for nanocrystalline Ni. The presented study focuses on the analysis of fatigue crack growth rate (FCGR) in focused ion beam‐notched microcantilevers prepared from nanocrystalline (NC) Ni as a model material.
Igor Moravcik   +7 more
wiley   +1 more source

Calculating the scale elasticity in DEA models. [PDF]

open access: yes
In economics scale properties of a production function is charcterised by the value of the scale elasticity. In the field of efficiency studies this is also a valid approach for the frontier production function. It has no good meaning to talk about scale
Lennart Hjalmarsson, Finn R. Førsund
core  

A Lightweight Procedural Layer for Hybrid Experimental–Computational Workflows in Materials Science

open access: yesAdvanced Engineering Materials, EarlyView.
We unveil a prototype hybrid‐workflow framework that fuses automatedcomputation with hands‐on experiments. Built atop pyiron, a lightweight, parameterized layer translates procedure descriptions into executable manual steps, syncing instrument settings, human interventions, and data capture in real‐time today.
Steffen Brinckmann   +8 more
wiley   +1 more source

Offshoring, Labour Market Institutions and the Elasticity of Labour Demand [PDF]

open access: yes
This paper analyses the evolution of the elasticity of labour demand and the role of offshoring therein using industry-level data for a large number of OECD countries.
Paul Swaim, Alexander Hijzen
core  

Teoria dello sviluppo economico e il caso italiano.

open access: yesMoneta e Credito, 2014
In this brief survey, the three most recent contributions to the discussion of growth rate differentials are considered. All three, using different arguments, arrive at the conclusion that such a disparity should be considered as exceptional. Some argue,
G. VACIAGO
doaj   +1 more source

Creep‐Induced Microstructural Evolution in an A2‐B2 Superalloy

open access: yesAdvanced Engineering Materials, EarlyView.
A 27.3Ta‐27.3Mo‐27.3Ti‐8Cr‐10Al (at.%) refractory high‐entropy alloy with precipitation‐strengthened A2‐B2 microstructure was studied by creep tests at 1030°C, which demonstrate a transition in deformation mechanisms in the range of 100–150 MPa applied stress. This is associated with changes in dislocation–precipitate interactions. Relevant deformation
Liu Yang   +10 more
wiley   +1 more source

A Sensitivity Analysis of the Elasticity of Taxable Income [PDF]

open access: yes
This paper applies the methods of Gruber and Saez (2002) to a panel of tax returns spanning 1979 through 2001 in order to examine the sensitivity of the elasticities of taxable and broad income to an array of factors. The paper finds that that Gruber and
Giertz, Seth
core   +1 more source

Active optics in astronomy – modeling of deformable substrates: freeform surfaces for FIREBall and MESSIER

open access: yesJournal of the Mechanical Behavior of Materials, 2018
Active optics techniques on large telescopes and astronomical instrumentations provide high imaging quality. For ground-based astronomy, the co-addition of adaptive optics again increases angular resolution up to providing diffraction-limited imaging at ...
Lemaitre Gérard Rene
doaj   +1 more source

Influence of Test Temperature and Test Frequency on Fatigue Life of Aluminum Alloy EN AW‐2618A

open access: yesAdvanced Engineering Materials, EarlyView.
The influence of test temperature and test frequency on the fatigue life of EN AW‐2618A is investigated. High‐cycle fatigue tests are performed at different test temperatures and frequencies on the 1000 h/230°C overaged state. Both test parameters reduce fatigue life due to time‐dependent damage mechanisms.
Ying Han   +5 more
wiley   +1 more source

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