Results 81 to 90 of about 177,775 (280)

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

Microstructural, Mechanical, and Textural Evolution of Dissimilar Combination of Laser‐Welded Maraging Steel and 4340 Steel

open access: yesAdvanced Engineering Materials, EarlyView.
The present work reports the microstructural, mechanical, and texture evolution of a dissimilar combination laser‐welded maraging steel with 4340 steel. This is important for aerospace applications. The demand for dissimilar welding is growing rapidly with the requirement of efficient and durable joints.
Bharat Behl   +3 more
wiley   +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

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

Influence of Fe Particle Size Distribution on Chemical Homogeneity, Microstructure, and Crack Formation in Fe–SiC Powder Blends Processed by PBF‐LB/M

open access: yesAdvanced Engineering Materials, EarlyView.
The influence of Fe particle size on in situ alloying of Fe–SiC powder blends in PBF‐LB/M is revealed. Contrary to expectations, the coarser Fe fraction provides a broader crack‐free processing window and slightly improved elemental homogeneity while producing higher but more variable hardness. The results highlight a complex trade‐off between particle
Anna Luise Strauch   +2 more
wiley   +1 more source

Experimental characterization of the thrust induced by laser ablation on an asteroid [PDF]

open access: yes, 2013
This paper presents an improved laser ablation model and compares the performance – Δv and mass efficiency - of laser ablation against contactless deflection methods based on ion-propulsion.
Vasile, Massimiliano   +4 more
core   +3 more sources

Interception and deviation of near earth objects via solar collector strategy [PDF]

open access: yes, 2008
A solution to the asteroid deviation problem via a low-thrust strategy is proposed. This formulation makes use of the proximal motion equations and a semi-analytical solution of the Gauss planetary equations.
Vasile, M.   +5 more
core   +5 more sources

Optoelectronic Synaptic Devices Using Molecular Telluride Phase‐Change Inks for Three‐Factor Learning

open access: yesAdvanced Functional Materials, EarlyView.
Optoelectronic synaptic devices based on solution‐processed molecular telluride GST‐225 phase‐change inks are demonstrated for three‐factor learning. A global optical signal broadcast through a silicon waveguide induces non‐volatile conductance updates exclusively in locally electrically flagged memristors.
Kevin Portner   +14 more
wiley   +1 more source

Distributed dislocation-residual stress model of cold rolled strips based on the complex variable function method of plane elasticity

open access: yes工程科学学报, 2016
In order to reveal the formation mechanism of the manifested waves of cold rolled strips,the distributed dislocation was calculated by using measured residual stress,and a distributed dislocation-residual stress model was proposed. The stress field of an
LI Nong   +5 more
doaj   +1 more source

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