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Author: Wolfgang Löffelhardt
Publisher: Springer Science & Business Media
ISBN: 3709113032
Category : Science
Languages : en
Pages : 333
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Book Description
The origin of energy-conserving organelles, the mitochondria of all aerobic eukaryotes and the plastids of plants and algae, is commonly thought to be the result of endosymbiosis, where a primitive eukaryote engulfed a respiring α-proteobacterium or a phototrophic cyanobacterium, respectively. While present-day heterotrophic protists can serve as a model for the host in plastid endosymbiosis, the situation is more difficult with regard to (the preceding) mitochondrial origin: Two chapters describe these processes and theories and inherent controversies. However, the emphasis is placed on the evolution of phototrophic eukaryotes: Here, intermediate stages can be studied and the enormous diversity of algal species can be explained by multiple secondary and tertiary (eukaryote-eukaryote) endosymbioses superimposed to the single primary endosymbiotic event. Steps crucial for the establishment of a stable, mutualistic relationship between host and endosymbiont, as metabolic symbiosis, recruitment of suitable metabolite transporters, massive gene transfer to the nucleus, development of specific translocases for the re-import of endosymbiont proteins, etc. are discussed in individual chapters. Experts, dealing with biochemical, genetic and bioinformatic approaches provide insight into the state of the art of one of the central themes of biology. The book is written for graduate students, postdocs and scientists working in evolutionary biology, phycology, and phylogenetics.
Author: Wolfgang Löffelhardt
Publisher: Springer Science & Business Media
ISBN: 3709113032
Category : Science
Languages : en
Pages : 333
Get Book Here
Book Description
The origin of energy-conserving organelles, the mitochondria of all aerobic eukaryotes and the plastids of plants and algae, is commonly thought to be the result of endosymbiosis, where a primitive eukaryote engulfed a respiring α-proteobacterium or a phototrophic cyanobacterium, respectively. While present-day heterotrophic protists can serve as a model for the host in plastid endosymbiosis, the situation is more difficult with regard to (the preceding) mitochondrial origin: Two chapters describe these processes and theories and inherent controversies. However, the emphasis is placed on the evolution of phototrophic eukaryotes: Here, intermediate stages can be studied and the enormous diversity of algal species can be explained by multiple secondary and tertiary (eukaryote-eukaryote) endosymbioses superimposed to the single primary endosymbiotic event. Steps crucial for the establishment of a stable, mutualistic relationship between host and endosymbiont, as metabolic symbiosis, recruitment of suitable metabolite transporters, massive gene transfer to the nucleus, development of specific translocases for the re-import of endosymbiont proteins, etc. are discussed in individual chapters. Experts, dealing with biochemical, genetic and bioinformatic approaches provide insight into the state of the art of one of the central themes of biology. The book is written for graduate students, postdocs and scientists working in evolutionary biology, phycology, and phylogenetics.
Author: Michael Cobley
Publisher: Hachette+ORM
ISBN: 0316221201
Category : Fiction
Languages : en
Pages : 481
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Book Description
A new standalone epic space opera, set in the same world as the Humanity's Fire trilogy. No world is safe. The Warcage: two hundred worlds harnessed to an articial sun in a feat of unprecedented stellar engineering. Built to travel through space as a monument to peace between alien species, now its voracious rulers have turned it into a nightmarish wasteland, capturing new planets for slaves and resources, then discarding the old. Now, when a verdant agri-world is pulled out of its orbit, the captain of a smuggler ship must journey into the Warcage to rescue his crew.
Author: Audrey Watters
Publisher: MIT Press
ISBN: 026254606X
Category : Education
Languages : en
Pages : 325
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Book Description
How ed tech was born: Twentieth-century teaching machines--from Sidney Pressey's mechanized test-giver to B. F. Skinner's behaviorist bell-ringing box. Contrary to popular belief, ed tech did not begin with videos on the internet. The idea of technology that would allow students to "go at their own pace" did not originate in Silicon Valley. In Teaching Machines, education writer Audrey Watters offers a lively history of predigital educational technology, from Sidney Pressey's mechanized positive-reinforcement provider to B. F. Skinner's behaviorist bell-ringing box. Watters shows that these machines and the pedagogy that accompanied them sprang from ideas--bite-sized content, individualized instruction--that had legs and were later picked up by textbook publishers and early advocates for computerized learning. Watters pays particular attention to the role of the media--newspapers, magazines, television, and film--in shaping people's perceptions of teaching machines as well as the psychological theories underpinning them. She considers these machines in the context of education reform, the political reverberations of Sputnik, and the rise of the testing and textbook industries. She chronicles Skinner's attempts to bring his teaching machines to market, culminating in the famous behaviorist's efforts to launch Didak 101, the "pre-verbal" machine that taught spelling. (Alternate names proposed by Skinner include "Autodidak," "Instructomat," and "Autostructor.") Telling these somewhat cautionary tales, Watters challenges what she calls "the teleology of ed tech"--the idea that not only is computerized education inevitable, but technological progress is the sole driver of events.
Author: Sharon Traweek
Publisher: Harvard University Press
ISBN: 0674257170
Category : Social Science
Languages : en
Pages : 210
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Book Description
The unique breed of particle physicists constitutes a community of sophisticated mythmakers—explicators of the nature of matter who forever alter our views of space and time. But who are these people? What is their world really like? Sharon Traweek, a bold and original observer of culture, opens the door to this unusual domain and offers us a glimpse into the inner sanctum.
Author: Michael Cobley
Publisher: Hachette+ORM
ISBN: 0316214027
Category : Fiction
Languages : en
Pages : 343
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Book Description
War erupts in the depths of space. . . Battle-ready factions converge above Darien, all with the same objective: to control this newly discovered planet and access the powerful weapons at its heart. Despotic Hegemony forces dominate much of known space and they want this world too, but Darien's inhabitants are determined to fight for their future. However, key players in this conflict aren't fully in control. Hostile AIs have infiltrated key minds and have an agenda, requiring nothing less than the destruction or subversion of all organic life. And they are near to unleashing their cohorts, a host of twisted machine intelligences caged beneath Darien. Fighting to contain them are Darien's hidden guardians, and their ancient ally the Construct, on a millennia-long mission to protect sentient species. As the war reaches its peak, the AI army is roaring to the surface, to freedom and an orgy of destruction.Darien is first in line in a machine vs. human war -- for life or the sterile dusts of space.
Author: Giorgio Matassi
Publisher: Frontiers Media SA
ISBN: 2832516513
Category : Science
Languages : en
Pages : 139
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Book Description
Author: Pierre Houbert
Publisher: Pierre Houbert
ISBN: 295343142X
Category :
Languages : en
Pages : 118
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Book Description
The programming language of TI-58 / TI-58C / TI-59
Author: Jamie Sawyer
Publisher: Hachette+ORM
ISBN: 0316386448
Category : Fiction
Languages : en
Pages : 371
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Book Description
Following Artefact, Legion is the second book of the Lazarus War, an explosive new space adventure series from one of the brightest new stars in science fiction -- perfect for fans of The Edge of Tomorrow, Alien and James S. A. Corey's Expanse series. Conrad Harris is the legend known as Lazarus, and he has died hundreds of times. Using simulant bodies, he runs suicide missions in the depths of space. But he always comes back. As commanding officer of the Lazarus Legion, Harris and his elite Simulant Operations team are humanity's last line of defence against the hostile alien race known as the Krell. Having survived their ordeal on Helios, they're now leading a large-scale mission to the perilous, unexplored region of the Damascus Rift. There, another Artefact has been discovered. It is the product of an ancient alien life form -- and a possible weapon to be used against the Krell. This Artefact could finally help humanity win the war. But what Harris and the Lazarus Legion will discover there is from their worst nightmares . . . Discover the Lazarus War -- the thrilling new space opera series of elite space marines and galactic empires, from one of the most exciting new voices in science fiction. 'A gripping read that moves at warp speed' Jack Campbell, author of the Lost Fleet novels, on The Lazarus War: Artefact "A hostile race of alien biomechs somewhat in the mould of H. R. Giger aliens . . . terrorism, subterfuge and traitors . . . starships sporting particle beam weapons, railguns the size of skyscrapers, laser batteries, missiles . . . And then there are the uber-human super-soldiers clad in powered armour and wielding plasma weapons . . . Is that enough for you? . . . This, dear readers, is the good stuff. Recommended" -- Neal Asher, author of the Agent Cormac novels, on The Lazarus War: Artefact "A highly promising science fiction debut -- a fun, gripping adventure story, with a mystery at its core that kept me turning the pages" -- Gary Gibson on The Lazarus War: Artefact "An adrenaline shot of rip-roaring military SF packed with cinematic action sequences and tightly drawn characters" -- Stephen Deas on The Lazarus War: Artefact
Author: Michael Cobley
Publisher: Hachette+ORM
ISBN: 0316214000
Category : Fiction
Languages : en
Pages : 346
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Book Description
The fight is on. So let the battle begin. Darien is no longer a lost outpost of humanity, but the prize in an intergalactic struggle. Hegemony forces control the planet, while Earth merely observes, rendered impotent by galactic politics. Yet Earth's ambassador to Darien will become a player in a greater conflict as there is more at stake than a turf war on a newly discovered world. An ancient temple hides access to a hyperspace prison, housing the greatest threat sentient life has never known. Millennia ago, malignant intelligences were caged there following an apocalyptic struggle, and their servants work on their release. Now a new war is coming.
Author: Paul J. Nahin
Publisher: Springer Science & Business Media
ISBN: 9780387985718
Category : Science
Languages : en
Pages : 674
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Book Description
This book explores the idea of time travel from the first account in English literature to the latest theories of physicists such as Kip Thorne and Igor Novikov. This very readable work covers a variety of topics including: the history of time travel in fiction; the fundamental scientific concepts of time, spacetime, and the fourth dimension; the speculations of Einstein, Richard Feynman, Kurt Goedel, and others; time travel paradoxes, and much more.
