Results 81 to 90 of about 142,515 (314)

Long term bending behavior of ultra-high performance concrete (UHPC) [PDF]

open access: yesConstructii: Journal of Civil Engineering Research, 2014
Unlike normal concrete (NC) the behavior of ultra-high performance concrete (UHPC) is different under long-term efforts, if we refer to creep, shrinkage or long-term deflections.
Gheorghe-Alexandru BĂRBOS
doaj  

Experimental evaluation of the effort of dune sand replacement levels on flexural behaviour of reinforced beam

open access: yesJournal of Asian Architecture and Building Engineering, 2020
An experimental investigation was conducted to explore the flexural behaviour of reinforced beam made with dune sand (DS) from Gurbantunggut desert in northwest China’s Xinjiang province.
Zhiqiang Li, Sen Yang, Yun Luo
doaj   +1 more source

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

On the consequences of a fragmentation due to a NEO mitigation strategy [PDF]

open access: yes, 2008
The fragmentation of an Earth threatening asteroid as a result of a hazard mitigation mission is examined in this paper. The minimum required energy for a successful impulsive deflection of a threatening object is computed and compared with the energy ...
Vasile, M.   +6 more
core  

Analysis of inelastic buckling of rectangular plates with a free edge using polynomial deflection functions

open access: yes, 2020
The inelastic buckling behaviour of different rectangular thin isotropic plates having a free edge is studied. Various combinations of boundary conditions are subject to in-plane uniaxial compression and each rectangular plate is bounded by an unloaded ...
Uchechi G. Eziefula   +1 more
core   +1 more source

Deflection, Frequency, and Stress Characteristics of Rectangular, Triangular, and Step Profile Microcantilevers for Biosensors

open access: yesSensors, 2009
This study presents the deflection, resonant frequency and stress results of rectangular, triangular, and step profile microcantilevers subject to surface stress. These cantilevers can be used as the sensing element in microcantilever biosensors.
Mohd Zahid Ansari, Chongdu Cho
doaj   +1 more source

DEFLECTED PRESENTATION IN LABOR. [PDF]

open access: yesJAMA: The Journal of the American Medical Association, 1902
The obstetrical terminology lacks in general exactness and precision. This is especially true, so far as slightly deflected head presentations are concerned. Not only in occasional papers and in general practice, but in textbooks which are considered standard books the normal head presentation is spoken of as vertex presentation, while there is no ...
openaire   +2 more sources

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

open access: yesAdvanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara   +8 more
wiley   +1 more source

Optimal trajectory design for interception and deflection of Near Earth Objects

open access: yes, 2010
Many asteroids and comets orbit the inner solar system; among them Near Earth Objects (NEOs) are those celestial bodies for which the orbit lies close, and sometimes crosses, the Earth's orbit.
Colombo, Camilla   +2 more
core  

Extension of the proximity-quotient control law for low-thrust propulsion [PDF]

open access: yes, 2008
In this paper, the proximity quotient control law, first developed by Petropoulos, is extended to account for both third body effects and solar radiation pressure based on the mission requirements for a hypothetical NEO deflection mission to the asteroid
Vasile, M.   +3 more
core  

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