Alexandre Giulietti's Books

Turbo Codes

Desirable and Designable

By: Alexandre Giulietti,Bruno Bougard,Liesbet Van Der Perre

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Turbo Codes

Desirable and Designable

By: Alexandre Giulietti,Bruno Bougard,Liesbet Van Der Perre

PREFACE The increasing demand on high data rate and quality of service in wireless communication has to cope with limited bandwidth and energy resources. More than 50 years ago, Shannon has paved the way to optimal usage of bandwidth and energy resources by bounding the spectral efficiency vs. signal to noise ratio trade-off. However, as any information theorist, Shannon told us what is the best we can do but not how to do it [1]. In this view, turbo codes are like a dream come true: they allow approaching the theoretical Shannon capacity limit very closely. However, for the designer who wants to implement these codes, at first sight they appear to be a nightmare. We came a huge step closer in striving the theoretical limit, but see the historical axiom repeated on a different scale: we know we can achieve excellent performance with turbo codes, but not how to realize this in real devices.

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Page Count

158

Publisher

Springer Science & Business Media

Published Date

ISBN 10

1461504775

ISBN 13

9781461504771

Peatlands of Southern Espinhaço Mountain Range, Brazil: Ecosystem Services, Biotic Interactions and Paleoenvironments

By: Alexandre Christofaro Silva,André Rodrigo Rech,Diego Tassinari

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Peatlands of Southern Espinhaço Mountain Range, Brazil: Ecosystem Services, Biotic Interactions and Paleoenvironments

By: Alexandre Christofaro Silva,André Rodrigo Rech,Diego Tassinari

Peatlands are transition ecosystems between terrestrial and aquatic environments, formed by the accumulation in time and space of plant tissues under conditions of excessive humidity, low nutrient availability, low pH and oxygen scarcity, where organic matter undergoes slow humification processes. The peatland ecosystems of the Southern Espinhaço Mountain Range, located in Minas Gerais State, Brazil, were formed by the sui generis combination of environmental factors, source of its great biodiversity, endemic and peculiar. For thousands of years these ecosystems have been developing, preserving proxies for environmental reconstitution, sequestering more and more carbon and increasing their capacity to store water ("sponge effect") and regulate the flow of water courses. Environmental reconstitution studies carried out in these ecosystems have evidenced several regional paleoclimatic changes in the last 35 thousand years. The stock of sequestered carbon is 4,877,840 tons and 142,138,262 m3 of water are stored in 14,288 ha of these peatlands. These ecosystems constitute the headwaters of rivers in the most important basins in eastern Brazil: the São Francisco, Jequitinhonha and Doce river basins and regulate their flow during the dry period of the year. However, peatlands located outside protected areas are threatened by anthropization. The Long-Term Ecological Research Program "Peatlands of the Southern Espinhaço Mountain Range: ecosystem services and biodiversity" – PELD TURF (fund: CNPq and FAPEMIG), started in 2021, intensified the characterization and monitoring of the biodiversity and ecosystem services of these peatlands. The results of two decades of research revealed the importance of these ecosystems for biodiversity, for the global carbon cycle, for regional water resources and for paleoenvironmental reconstitution. It was also evident that the rapid degradation of these ecosystems, caused mainly by anthropization, can irreversibly compromise, in the medium term, their ecosystem services, biodiversity and paleoenvironmental reconstitution studies. Thus, it is urgent to empower local and regional communities about the importance of peatland ecosystems both for the environment, for the socio-economy and for the quality of life of their populations, as well as for the planet.

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Page Count

102

Publisher

Editora Appris

Published Date

ISBN 10

6525038111

ISBN 13

9786525038117

Turbo Codes

Desirable and Designable

By: Alexandre Giulietti,Bruno Bougard,Liesbet Van Der Perre

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Turbo Codes

Desirable and Designable

By: Alexandre Giulietti,Bruno Bougard,Liesbet Van Der Perre

Average ratings

N/A

Write a review

Solve jigsaw puzzle

Age

Page Count

158

Publisher

Springer Science & Business Media

Published Date

ISBN 10

1461504775

ISBN 13

9781461504771

Book's by Alexandre Giulietti

Turbo Codes

Turbo Codes

Peatlands of Southern Espinhaço Mountain Range, Brazil: Ecosystem Services, Biotic Interactions and Paleoenvironments

Peatlands of Southern Espinhaço Mountain Range, Brazil: Ecosystem Services, Biotic Interactions and Paleoenvironments

Turbo Codes

Turbo Codes

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