Results 111 to 120 of about 7,254 (287)
Biological Reviews, EarlyView.ABSTRACT Three categories of explanations exist for why we age: mechanistic theories, which omit reference to evolutionary forces; weakening force of selection theories, which posit that barriers exist that prevent evolutionary forces from optimising fitness in ageing; and optimisation theories, which posit that evolutionary forces actually select for ...
Michael S. Ringel
wiley +1 more source
Understanding The Investment Casting Process For Metal Parts And Cast Components [PDF]
Annals of the University of Petroşani. Mechanical EngineeringInvestment casting is a precision manufacturing technique widely used for producing complex metal components with tight tolerances and excellent surface quality.
Cristina Pupăză +3 more
doaj
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 +42 more
wiley +1 more source
Fabrication and Evaluation of New Investment for Dental Application
مجله دانشکده دندانپزشکی اصفهان, 2007 Introduction: Investment materials have been used to produce molds for casting of Inlays, Onlays, crowns and bridges. In this study, gypsum and investments routinely used in Iran, were evaluated and characterized, then α hemi hydrate calcium sulfate and ...
T Ahmadi, MH Fathi, A Monshi
doaj
Application of Stereolithography Based 3D Printing Technology in Investment Casting. [PDF]
Micromachines (Basel), 2020 Mukhtarkhanov M, Perveen A, Talamona D.
europepmc +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 +2 more
wiley +1 more source
Thin Walled Investment Castings
, 2014 This review is presented as a part of the literature review performed in the Clean Sky project LEAN - Development of light-weight steel castings for efficient aircraft engines, coordinated by Swerea SWECAST during 2011-2013. From a foundryman’s point of view, fluidity is related to the ability for a metal to fill a mould while fluidity is related to ...
Svenningsson, Roger, Farre, Sten
openaire +1 more source
Design of Honeycomb Structures Produced by Investment Casting [PDF]
, 2019 K. Naplocha +3 more
openalex +1 more source
European Ports as Energy Hubs: A Sustainability Index to Assess Territorial Development
Business Strategy and the Environment, EarlyView.ABSTRACT The capacity of ports to act as energy hubs is increasingly relevant in light of sustainability challenges and global crises like the Ukraine conflict, the COVID‐19 pandemic and energy scarcity. Numerous international and national initiatives are shaping the future of port development to address environmental and economic concerns.
Paolo Mazzocchi +3 more
wiley +1 more source