Results 91 to 100 of about 323,918 (260)
Myers' type theorem with the Bakry-\'Emery Ricci tensor
, 2018 In this paper we prove a new Myers' type diameter estimate on a complete connected Reimannian manifold which admits a bounded vector field such that the Bakry-\'Emery Ricci tensor has a positive lower bound.
Wu, Jia-Yong
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Advanced Engineering Materials, EarlyView.Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth +6 more
wiley +1 more source
Ciencia del Suelo, 2011 O papel do fogo nos processos ambientais é amplamente reportado nos diversos ecossistemas da Terra. O fogo influencia diversos processos ambientais no solo (e.g. infiltração, erodibilidade, dinâmica de matéria orgânica etc.).
Edivaldo Lopes Thomaz
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Classification of Varieties of Grain Species by Artificial Neural Networks
Agronomy, 2018 In this study, an Artificial Neural Network (ANN) model was developed in order to classify varieties belonging to grain species. Varieties of bread wheat, durum wheat, barley, oat and triticale were utilized.
Alper Taner +4 more
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Removal of spacecraft-surface particulate contaminants by simulated micrometeoroid impacts [PDF]
A series of hypervelocity impacts has been conducted in an exploding lithium-wire accelerator to examine with a far-field holographic system the removal of particulate contaminants from external spacecraft surfaces subjected to micrometeoroid bombardment.
Chu, W. P. +3 more
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Advanced Engineering Materials, EarlyView.Nickel‐based alloys are widely used in high‐temperature applications due to their excellent mechanical strength and oxidation resistance. However, properties such as high‐temperature strength and pronounced work‐hardening make them difficult to machine.
Soheil Rooein +2 more
wiley +1 more source
Advanced Engineering Materials, EarlyView.The presented study focuses on the fracture behaviour of carbon‐bonded magnesia MgO–C refractories, where environmentally friendly fructose, collagen and lignin serve as temporary binding agents. The partial substitution of the source material with recycled MgO–C reduces the fracture resistance, which can be counteracted by the additional introduction ...
Marc Neumann +6 more
wiley +1 more source
Planar Laser Imaging of Sprays for Liquid Rocket Studies [PDF]
A planar laser imaging technique which incorporates an optical polarization ratio technique for droplet size measurement was studied. A series of pressure atomized water sprays were studied with this technique and compared with measurements obtained ...
Lee, W. +4 more
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Effect of Laser Deoxidation on Adhesive‐Bonded Aluminum in an Oxygen‐Free Atmosphere
Advanced Engineering Materials, EarlyView.This study investigates laser ablation of aluminum under oxygen‐free conditions. The goal is to produce oxide‐free substrates that enable improved adhesive bonding with epoxy. Optimized laser parameters (90% overlap, 300 µJ) combined with oxide‐free substrates result in the highest tensile strength of the adhesive bond.
Sandra Gerland +5 more
wiley +1 more source
THE STUDY OF GEOMETRICAL PARAMETERS OF SOME VARIETIES OF BEANS GROWN IN KYRGYZSTAN BEFORE AND AFTER THE HYDROTHERMAL TREATMENT [PDF]
Техника и технология пищевых производств, 2015 Beans have a high nutritional value and are well digested in a human body. The Kyrgyz Republic is producing more than 20 varieties of beans, 90% of the produce being exported.
Kydyraliev N.A.
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