Results 101 to 110 of about 4,693,292 (348)

Laser Metal Deposited Ti4822 Hollow Pipe: Experimental and Computational Modelling Study

open access: yesAdvanced Engineering Materials, EarlyView.
Laser metal deposition (LMD) of a crack‐free built Ti4822 alloys is challenging. This article reports outstanding characteristics of a hollow pipe that is built with LMD technology when a predicted, nontransformation substrate temperature of 800 °C is used.
Sadiq A. Raji   +5 more
wiley   +1 more source

A review of Gammiella Broth. in Africa : with a range extension to the East African islands and southern Africa [PDF]

open access: yes, 2003
Gammiella ceylonensis (Broth. in Herzog) W.R.Buck & B.C.Tan is the only species of the genus in Africa. Clastobryella pusilla (Thér.) Wijk & Margad., recorded from Madagascar, the only member of the genus still recorded on the moss checklist for Africa ...
O’Shea, Brian J.
core  

Microstructural Evolution and Mechanical Performance of Plasma‐Assisted Hybrid Friction Stir Welded Dissimilar Aluminum–Copper Joints

open access: yesAdvanced Engineering Materials, EarlyView.
Plasma‐assisted hybrid friction stir welding of dissimilar AlCu joints employs localized plasma preheating to balance heat input and enhance plastic flow. The optimized process reduces axial force by up to 35%, refines the microstructure, and achieves ≈96% joint efficiency.
Deepak Kumar Yaduwanshi   +3 more
wiley   +1 more source

Editorial: Nanoparticle Vaccines Against Infectious Diseases

open access: yesFrontiers in Immunology, 2019
Rajko Reljic   +2 more
doaj   +1 more source

Elena Brockmann: el viaje de formación de una joven pintora. Cartas inéditas desde Roma (1886-1887)

open access: yesEspacio, Tiempo y Forma. Serie VII, Historia del Arte
En este artículo se estudian por primera vez las cartas que la pintora Elena Brockmann (1865-1946) envió a su madre desde Roma, donde se formó artísticamente entre los años 1886 y 1887.
África Cabanillas Casafranca
doaj  

Innovation Africa [PDF]

open access: yes, 2010
It is now ten years since the Economist newspaper declared Africa to be “the hopeless continent”. Today, the same magazine offers a different prognosis, building on the World Bank’s prediction of growth rates for sub-Saharan African economies that will ...
Hall, M
core   +1 more source

Enhancing Food Security in a Changing Climate in Africa [PDF]

open access: yes, 2020
Climate and socio-ecological change scenarios are invaluable tools in developing appropriate response options for ensuring food security and human wellbeing in the future: evidence-based approach.
Africa Group of Negotiators Expert Support
core   +1 more source

Design and Applications of Multi‐Frequency Programmable Metamaterials for Adaptive Stealth

open access: yesAdvanced Functional Materials, EarlyView.
This article provides a comprehensive overview of metamaterials, including their fundamental principles, properties, synthesis techniques, and applications in stealth, as well as their challenges and future prospects. It covers topics that are more advanced than those typically discussed in existing review articles, while still being closely connected ...
Jonathan Tersur Orasugh   +4 more
wiley   +1 more source

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