Results 101 to 110 of about 5,696,429 (330)

Unidirectional Tape‐Based Composites from Hemp and Pineapple Leaf Fiber: Mechanical Performance in Conventional and Bio‐Based Matrices

open access: yesAdvanced Engineering Materials, EarlyView.
The study investigates novel semi‐finished products made of unidirectionally arranged hemp or pineapple leaf fiber‐reinforced composites produced from different matrices. The materials are analyzed in terms of their mechanical and interfacial properties and void content.
Nina Graupner   +22 more
wiley   +1 more source

Interaction between Molten Al‐Killed Mn–B Steel and Carbon‐Bonded MgO Refractories Based on Recyclates

open access: yesAdvanced Engineering Materials, EarlyView.
High‐temperature interactions between low‐sulfur Al‐killed Mn–B steel and MgO–C refractories (0 and 50 wt% recyclates) are studied via finger immersion tests (1600 °C). Surface‐active elements influence infiltration. MgO/CaS layer forms, along with spinel and calcium silicate.
Matheus Roberto Bellé   +5 more
wiley   +1 more source

Free resolutions for semi-direct products

open access: yesTohoku Mathematical Journal, 1993
We define a notion of one group acting on a free resolution for another and show how this can lead to a free resolution for the semi-direct product. We apply this result to obtain a free resolution for dihedral groups.
openaire   +3 more sources

3D‐Printed Serial Snap‐Through Architectures for Programmable Mechanical Response

open access: yesAdvanced Engineering Materials, EarlyView.
A serial snap‐through architecture is realized using compact 3D‐printed von Mises truss units arranged in a staged cascade. Their geometry and boundary conditions program multistage mechanical responses with plateaux and re‐hardening regimes. An inverted‐compliance model predicts these behaviors and enables analytical design of programmable force ...
Filipe A. Santos
wiley   +1 more source

Exploring the Impact of ACE Inhibition in Immunity and Disease. [PDF]

open access: yesJ Renin Angiotensin Aldosterone Syst, 2022
Oosthuizen D, Sturrock ED.
europepmc   +1 more source

Pratiques agricoles et perceptions paysannes de l'usage des herbicides dans les champs familiaux au Nord-Cameroun [PDF]

open access: yes, 2015
Pour mieux comprendre les stratégies des agriculteurs et comparer les performances économiques du semis direct avec herbicides par rapport au labour, une recherche a été conduite dans deux villages au Nord Cameroun. L'analyse porte sur leurs motivations,
Dugué, Patrick   +3 more
core  

Removing Homocoupling Defects in Alkoxy/Alkyl‐PBTTT Enhances Polymer:Fullerene Co‐Crystal Formation and Stability

open access: yesAdvanced Functional Materials, EarlyView.
PBTTT‐OR‐R, a C14‐alkoxy/alkyl‐PBTTT polymer derivative, is of substantial interest for optoelectronics due to its specific fullerene intercalation behavior and enhanced charge‐transfer absorption. Comparing this polymer with (S) and without (O) homocoupling defects reveals that PBTTT‐OR‐R(O) forms stable co‐crystals with PC61BM, while PBTTT‐OR‐R(S ...
Zhen Liu   +14 more
wiley   +1 more source

Diffusion des systèmes de semis direct avec couverture végétale à Madagascar [PDF]

open access: yes, 2010
Dans les zones de moyenne altitude de Madagascar, les systèmes de culture fondés sur le semis direct, la présence d'une couverture végétale et une rotation des cultures sont diffusés en milieu paysan depuis le début des années 2000 avec un certain succès.
Penot, E.
core   +1 more source

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