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result(s) for
"Reynolds, Alastair"
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Shadow captain
\"Adrana and Fura Ness have finally been reunited, but both have changed beyond recognition. Once desperate for adventure, now Adrana is haunted by her enslavement on the feared pirate Bosa Sennen's ship. And rumors of Bosa Sennen's hidden cache of treasure have ensnared her sister, Fura, into single-minded obsession. Neither is safe; because the galaxy wants Bosa Sennen dead and they don't care if she's already been killed. They'll happily take whoever is flying her ship\"-- Provided by publisher.
Book
Scaled Physical Modelling of Floating Offshore Wind Turbines Using a Neural Network‐Based Surrogate Model for Aerodynamic Emulation
ABSTRACT
Scaled physical modelling of floating offshore wind turbines is a crucial step in the continued development of floating offshore wind to reach Net‐Zero goals. However, it is an inherently difficult task due to the incongruity between Reynolds scaling (important for wind effects) and Froude scaling (important for wave effects). One option to overcome this difficulty is to use a real‐time hybrid testing approach, whereby a Froude‐scaled model is tested in a wave basin with a thruster replacing the wind turbine. Typically, a low‐fidelity numerical model is run in real time to determine the appropriate aerodynamic thrust applied by the thruster. In this paper, the real‐time hybrid testing approach is extended by using a surrogate model, pretrained on numerical simulations, to determine aerodynamic thrust in the lab. It is found that for less complex wind load conditions, such as constant wind or turbulent wind with the wind turbine controller turned off, multiple linear regressions are satisfactory surrogate models, but for turbulent wind with the wind turbine controller turned on, artificial neural networks offer significant improvement. The development of the appropriate surrogate models is presented, and they are shown to predict thrust on a testing dataset with a mean absolute error over average thrust of <$$ < $$ 2% for operational environmental conditions and <$$ < $$ 6% for the most extreme environmental conditions tested. The methodology is demonstrated by testing a 1:70 scale of the VolturnUS‐S platform with the 15MW IEA wind turbine, in the COAST Laboratory, University of Plymouth, in benign and extreme weather conditions representative of a location in the Celtic Sea. The novel methodology represents an improvement on the ability to accurately test floating offshore wind turbines in the laboratory, by enabling aerodynamics to be represented using higher fidelity numerical modelling, physical or field data.
Journal Article
Elysium fire
Ten thousand city-state habitats orbit the planet Yellowstone, forming a near perfect democratic human paradise. But even utopia has a dark side. As members of the habitats start suddenly and randomly dying, a charismatic figure begins to sow insurrection, convincing a small but growing number of inhabitants to break away from the Glitter Band.
Book
Science fiction when the future is now
Six authors parse the implications of our unhinged era for their craft.
Six authors parse the implications of our unhinged era for their craft.
Journal Article
Raft
\"A spaceship from Earth accidentally crossed through a hole in space-time to a universe where the force of gravity is one billion times as strong as the gravity we know. Somehow the crew survived, aided by the fact that they emerged into a cloud of gas surrounding a black hole, which provided a breathable atmosphere. Five hundred years later, their descendants still struggle for existence, divided into two main groups. The Miners live on the Belt, a ramshackle ring of dwellings orbiting the core of a dead star, which they excavate for raw materials. These can be traded for food from the Raft, a structure built from the wreckage of the ship, on which a small group of scientists preserve the ancient knowledge which makes survival possible. Rees is a Miner whose curiosity about his world makes him stow away on a flying tree - just one of the many strange local lifeforms - carrying trade between the Belt and the Raft. And what he finds will change his world.\"--Provided by publisher
Book
The Medusa chronicles : a novel
\"A sequel to Sir Arthur C. Clarke's Nebula Award-winning novella \"A Meeting with Medusa,\" this novel continues the thrilling adventure of astronaut Howard Falcon, humanity first explorer of Jupiter from two modern science fiction masters. Howard Falcon almost lost his life in an accident as the first human astronaut to explore the atmosphere of Jupiter and a combination of human ingenuity and technical expertise brought him back. But he is no longer himself. Instead, he has been changed into an augmented human: part man, part machine, and exceptionally capable. With permission from the Clarke Estate, Stephen Baxter and Alastair Reynolds continue this beloved writer enduring vision and have created a fresh story for new readers. The Medusa Chronicles charts Falcon journey through the centuries granted by his new body, but always back to mysteries of Jupiter and the changing interaction between humanity and the universe. A compelling read full of incredible action right from the beginning, this is a modern classic in the spirit of 2001 and The Martian.\"--Amazon.
BOOK
Science fiction when the future is now
Six authors parse the implications of our unhinged era for their craft.
Journal Article