Activated Sludge and Aerobic Biofilm Reactors is the fifth volume in the series Biological Wastewater Treatment. The first part of the book is devoted to the activated sludge process, covering the removal of organic matter, nitrogen and phosphorus.A detailed analysis of the biological reactor (aeration tank) and the final sedimentation tanks is provided. The second part of the book covers aerob…
How the presence of the tsetse fly turned the African forest into an open laboratory where African knowledge formed the basis of colonial tsetse control policies. The tsetse fly is a pan-African insect that bites an infective forest animal and ingests blood filled with invisible parasites, which it carries and transmits into cattle and people as it bites them, leading to n'gana (animal trypanos…
This report summarizes the results of an ambitious three-year ethnographic study, funded by the John D. and Catherine T. MacArthur Foundation, into how young people are living and learning with new media in varied settings—at home, in after school programs, and in online spaces. It offers a condensed version of a longer treatment provided in the book Hanging Out, Messing Around, and Geeking O…
A comprehensive overview of holographic methods in quantum matter, written by pioneers in the field. This book, written by pioneers in the field, offers a comprehensive overview of holographic methods in quantum matter. It covers influential developments in theoretical physics, making the key concepts accessible to researchers and students in both high energy and condensed matter physics. The b…
An examination of young people's everyday new media practices—including video-game playing, text-messaging, digital media production, and social media use. Conventional wisdom about young people's use of digital technology often equates generational identity with technology identity: today's teens seem constantly plugged in to video games, social networking sites, and text messaging. Yet ther…
Why the traditional “pledge and review” climate agreements have failed, and how carbon pricing, based on trust and reciprocity, could succeed. After twenty-five years of failure, climate negotiations continue to use a “pledge and review” approach: countries pledge (almost anything), subject to (unenforced) review. This approach ignores everything we know about human cooperation. In this…
An explanation of the mathematics needed as a foundation for a deep understanding of general relativity or quantum field theory. Physics is naturally expressed in mathematical language. Students new to the subject must simultaneously learn an idiomatic mathematical language and the content that is expressed in that language. It is as if they were asked to read Les Misérables while struggling w…
How emergent practices and developments in young people's digital media can result in technological innovation or lead to unintended learning experiences and unanticipated social encounters. Young people's use of digital media may result in various innovations and unexpected outcomes, from the use of videogame technologies to create films to the effect of home digital media on family life. This…
Tools to make hard problems easier to solve. In this book, Sanjoy Mahajan shows us that the way to master complexity is through insight rather than precision. Precision can overwhelm us with information, whereas insight connects seemingly disparate pieces of information into a simple picture. Unlike computers, humans depend on insight. Based on the author's fifteen years of teaching at MIT, Cam…
The scientific discovery and mastery of electricity created as many important changes in modern society as did the invention of alphabetical writing in antiquity and movable type in the fifteenth century. It is more than a natural phenomenon that science has harnessed for human use; it is a central feature of the modern episteme. It has inspired writers and artists, propelled industry and innov…