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An updated edition of a classic: an indispensable companion for a
new era in cycling. The bicycle is almost unique among
human-powered machines in that it uses human muscles in a
near-optimum way. This essential volume offers a comprehensive
account of the history of bicycles, how human beings propel them,
what makes them go faster-and what keeps them from going even
faster. Over the years, and through three previous editions,
Bicycling Science has become the bible of technical bicycling not
only for designers and builders of bicycles but also for cycling
enthusiasts. After a brief history of bicycles and bicycling that
demolishes many widespread myths, this fourth edition covers recent
experiments and research on human-powered transportation, with
updated material on cycling achievements, human-powered machines
for use on land and in air and water, power-assisted bicycles, and
human physiology. The authors have also added new information on
aerodynamics, rolling drag, transmission of power from rider to
wheels, braking, heat management, steering and stability, power and
speed, and other topics. This edition also includes many new
references and figures. With racks of bikeshare bikes on city
sidewalks, and new restrictions on greenhouse gas-emitting cars,
bicycle use will only grow. This book is the indispensable
companion for a new era in cycling.
Spiritualism and mediumship are often regarded as the product of
lingering superstition in the Victorian era, and as having limited
relevance in modern Anglo-American society. Scholarship to date
which has considered Spiritualism as a distinct religious tradition
has focussed on analysing the phenomenon in terms of spirit
possession only. This volume analyses the development of shamanism
(communication with the spiritual world) as a concept within North
American English-speaking scholarship, with particular focus on
Mircea Eliade's influential cross-cultural presentation of
shamanism. By re-examining the work of Sergei Shirokogoroff, one of
Eliade's principal sources, the traditional Evenki shamanic
apprenticeship is compared and identified with the new Spiritualist
apprenticeship. The author demonstrates that Spiritualism is best
understood as a traditional shamanism, as distinct from
contemporary appropriations or neo-shamanisms. He argues that
shamanism is the outcome of an apprenticeship in the management of
psychic experiences, and which follows the same pattern as that of
the apprentice medium. In doing so, the author offers fresh
insights into the mechanisms that are key to sustaining mediumship
as a social institution.
The second edition of a comprehensive textbook that introduces
turbomachinery and gas turbines through design methods and
examples. This comprehensive textbook is unique in its
design-focused approach to turbomachinery and gas turbines. It
offers students and practicing engineers methods for configuring
these machines to perform with the highest possible efficiency.
Examples and problems are based on the actual design of
turbomachinery and turbines. After an introductory chapter that
outlines the goals of the book and provides definitions of terms
and parts, the book offers a brief review of the basic principles
of thermodynamics and efficiency definitions. The rest of the book
is devoted to the analysis and design of real turbomachinery
configurations and gas turbines, based on a consistent application
of thermodynamic theory and a more empirical treatment of fluid
dynamics that relies on the extensive use of design charts. Topics
include turbine power cycles, diffusion and diffusers, the analysis
and design of three-dimensional free-stream flow, and combustion
systems and combustion calculations. The second edition updates
every chapter, adding material on subjects that include flow
correlations, energy transfer in turbomachines, and
three-dimensional design. A solutions manual is available for
instructors. This new MIT Press edition makes a popular text
available again, with corrections and some updates, to a wide
audience of students, professors, and professionals.
Spiritualism and mediumship are often regarded as the product of
lingering superstition in the Victorian era, and as having limited
relevance in modern Anglo-American society. Scholarship to date
which has considered Spiritualism as a distinct religious tradition
has focussed on analysing the phenomenon in terms of spirit
possession only. This volume analyses the development of shamanism
(communication with the spiritual world) as a concept within North
American English-speaking scholarship, with particular focus on
Mircea Eliade's influential cross-cultural presentation of
shamanism. By re-examining the work of Sergei Shirokogoroff, one of
Eliade's principal sources, the traditional Evenki shamanic
apprenticeship is compared and identified with the new Spiritualist
apprenticeship. The author demonstrates that Spiritualism is best
understood as a traditional shamanism, as distinct from
contemporary appropriations or neo-shamanisms. He argues that
shamanism is the outcome of an apprenticeship in the management of
psychic experiences, and which follows the same pattern as that of
the apprentice medium. In doing so, the author offers fresh
insights into the mechanisms that are key to sustaining mediumship
as a social institution.
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