Results 81 to 90 of about 44,461 (293)

The impacts of biological invasions

Biological Reviews, EarlyView.
ABSTRACT The Anthropocene is characterised by a continuous human‐mediated reshuffling of the distributions of species globally. Both intentional and unintentional introductions have resulted in numerous species being translocated beyond their native ranges, often leading to their establishment and subsequent spread – a process referred to as biological
Phillip J. Haubrock, Teun Everts, Neil Angelo S. Abreo, Jamie Bojko, Victor Deklerck, James W. E. Dickey, Ana Clara S. Franco, Emili García‐Berthou, Stelios Katsanevakis, Natalia I. Kirichenko, Stefano Mammola, Martin A. Nuñez, Ben Parker, Riccardo Scalera, Ismael Soto, Diederik Strubbe, Ali Serhan Tarkan, Lorenzo Vilizzi, Tim Adriaens, Paride Balzani, Dagmara Błońska, Elizabeta Briski, Rein Brys, Amy L. Burgess, James E. Byers, Carlos Cano‐Barbacil, Giuseppe Castaldelli, Jaimie T.A. Dick, Victoria Dominguez Almela, Romina D. Dimarco, Margarita Florencio, Antonín Kouba, Melina Kourantidou, Irmak Kurtul, Irene Martín‐Forés, Olivier Morissette, Julian D. Olden, Bruno E. Soares, Jakub Truszkowski, Hugo Verreycken, Marc Kenis, Ronaldo Sousa, J. Robert Britton   +42 more
wiley   +1 more source

Modeling of wire-cut electrical discharge machining process by finite element method

Омский научный вестник
The paper proposes a methodology for modeling of wire-cut electrical discharge machining processes by finite element method. The authors describe the main approaches to calculating thermal fields by analyzing the recast layer and phase transformations ...
N. V. Bobkov, A. A. Fedorov, N. S. Artemenko   +2 more
doaj   +1 more source

The Effects of Reduced Graphene Oxide Flakes in the Dielectric on Electrical Discharge Machining

Nanomaterials, 2019
Electrical discharge machining (EDM) is a nonconventional technology that is frequently used in manufacturing for difficult-to-cut conductive materials. Drawbacks to using EDM include the resulting surface roughness and integrity.
Rafał Świercz, Dorota Oniszczuk-Świercz   +1 more
doaj   +1 more source

Modified CNTs/Nafion composite: The role of sulfonate groups on the performance of prepared proton exchange methanol fuel cell’s membrane [PDF]

Journal of Particle Science and Technology, 2017
A novel Nafion®-based nanocomposite membrane was synthesized to be applied as direct methanol fuel cells (DMFCs). Carbon nanotubes (CNTs) were coated with a layer of silica and then reacted by chlorosulfonic acid to produce sulfonate-functionalized ...
Kamran Janghorban, Payam Molla-Abbasi
doaj   +1 more source

Shock Formation in a Multidimensional Viscoelastic Diffusive System [PDF]

, 1995
We examine a model for non-Fickian "sorption overshoot" behavior in diffusive polymer-penetrant systems. The equations of motion proposed by Cohen and White [SIAM J. Appl. Math., 51 (1991), pp.
Cohen, Donald S., White, Andrew B., Jr., Witelski, Thomas P.   +2 more
core   +2 more sources

Performance Study of Biocompatible Recast Layer Formation on Ti6Al4V by using Electrical Discharge Coatings

International Journal of Automotive and Mechanical Engineering, 2020
Long-term implantation of titanium-based alloy, Ti6Al4V can be harmful in human bodies due to the release of aluminium and vanadium elements. Thus, a biocompatible barrier coating can be applied towards corrosion and wear resistance of the implant. In this research, the surface of a biomedical grade of Ti6Al4V was coated with a thin film of biomaterial
A. F. Mansor, A. I. Azmi, M. Zahiruddin, M. N. Islam   +3 more
openaire   +1 more source

Early evolutionary history of the seed

Biological Reviews, EarlyView.
ABSTRACT The seed is an essential stage in the life history of gymnospermous and angiospermous plants, facilitating both their survival and dispersal. We reappraise knowledge of the evolutionary history of the gymnospermous seed, from its origin in the late Devonian through to the well‐known end‐Permian extinctions – an interval encompassing the ...
Richard M. Bateman, Alan R. T. Spencer, Jason Hilton   +2 more
wiley   +1 more source

Nonlinear Response‐History Analyses of Masonry and Mixed Structures With HybriDFEM

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT The hybrid discrete‐finite element (HybriDFEM) method, previously developed to perform static and modal analysis in discrete and coupled discrete‐finite element models, is extended to nonlinear response‐history analyses. The equations of motion for the HybriDFEM model are solved through various numerical time‐integration schemes, both explicit
Igor Bouckaert, Michele Godio, João Pacheco de Almeida   +2 more
wiley   +1 more source

Nutritional Potential, Phytochemical Content, In Vivo Antioxidant, and Antanemic Potential of Musa paradisiaca Flower

Food Chemistry International, EarlyView.
After collecting Musa paradisiaca leaves, some were dried and others were used to produce aqueous extracts. The extracts and powders were characterized and then administered to rats made anaemic by PHZ. After 14 days of administration of the two samples, the rats were euthanized and it was observed that after 9 days of treatment, the aqueous extract ...
Josée Rebeca Nombo, Jethro Roland Misse Ngangue Ekwala, Somon Régine Tuem, Stéphano Tene Tambo, Merlin Ngafon Nchoutpouen, Valery Jean François Nsoga, Jules Christophe Koule Manz, Jordan Mekui Nwotue, Mathieu Ndomou   +8 more
wiley   +1 more source

Construction of Neural Network Classification Expert Systems Using Switching Theory Algorithms [PDF]

, 1992
A new family of neural network architectures is presented. This family of architectures solves the problem of constructing and training minimal neural network classification expert systems by using switching theory.
Jaskolski, John V.
core   +1 more source