A handbook for the herpetologist professional, student, or amateur anxious to acquaint himself with African Amphibia. The geographic location and climatic variety of Malawi make it possible for this small country to support a large number of frogs and toads, many of them representative of much of sub-Sahara Africa. This book contributes greatly to the relatively sparse literature on African Amphibia. Professor Stewart bases her book on extensive field notes made during a year s stay in Malawi, supplemented by museum and literature research. A talented draftsman as well as a trained biologist, she has provided over sixty detailed drawings to accompany her species descriptions. In addition, twenty full-color photographs illustrate some of the more striking varieties. The species descriptions note not only distinguishing features for identification, but provide full information on life history and habits. The book contains a key for identification of the species covered, generic characteristics, a glossary, a bibliography, a systematic index of species as well as a general index. The student and amateur herpetologist will be particularly interested in Dr. Stewart s introduction which discusses the background of amphibian studies in Malawi and the whys and hows of amphibian studies in general. This includes what an amphibian is, notes on classification, and how to collect, record, and identify frogs. Throughout the book, she points the student to area where more knowledge is needed and unsolved problems remain.
A guide for using computational text analysis to learn about the social world From social media posts and text messages to digital government documents and archives, researchers are bombarded with a deluge of text reflecting the social world. This textual data gives unprecedented insights into fundamental questions in the social sciences, humanities, and industry. Meanwhile new machine learning tools are rapidly transforming the way science and business are conducted. Text as Data shows how to combine new sources of data, machine learning tools, and social science research design to develop and evaluate new insights. Text as Data is organized around the core tasks in research projects using text—representation, discovery, measurement, prediction, and causal inference. The authors offer a sequential, iterative, and inductive approach to research design. Each research task is presented complete with real-world applications, example methods, and a distinct style of task-focused research. Bridging many divides—computer science and social science, the qualitative and the quantitative, and industry and academia—Text as Data is an ideal resource for anyone wanting to analyze large collections of text in an era when data is abundant and computation is cheap, but the enduring challenges of social science remain. Overview of how to use text as data Research design for a world of data deluge Examples from across the social sciences and industry
A handbook for the herpetologist professional, student, or amateur anxious to acquaint himself with African Amphibia. The geographic location and climatic variety of Malawi make it possible for this small country to support a large number of frogs and toads, many of them representative of much of sub-Sahara Africa. This book contributes greatly to the relatively sparse literature on African Amphibia. Professor Stewart bases her book on extensive field notes made during a year s stay in Malawi, supplemented by museum and literature research. A talented draftsman as well as a trained biologist, she has provided over sixty detailed drawings to accompany her species descriptions. In addition, twenty full-color photographs illustrate some of the more striking varieties. The species descriptions note not only distinguishing features for identification, but provide full information on life history and habits. The book contains a key for identification of the species covered, generic characteristics, a glossary, a bibliography, a systematic index of species as well as a general index. The student and amateur herpetologist will be particularly interested in Dr. Stewart s introduction which discusses the background of amphibian studies in Malawi and the whys and hows of amphibian studies in general. This includes what an amphibian is, notes on classification, and how to collect, record, and identify frogs. Throughout the book, she points the student to area where more knowledge is needed and unsolved problems remain.
The treetops of the world's forests are where discovery and opportunity abound, however they have been relatively inaccessible until recently. This book represents an authoritative synthesis of data, anecdotes, case studies, observations, and recommendations from researchers and educators who have risked life and limb in their advocacy of the High Frontier. With innovative rope techniques, cranes, walkways, dirigibles, and towers, they finally gained access to the rich biodiversity that lives far above the forest floor and the emerging science of canopy ecology. In this new edition of Forest Canopies, nearly 60 scientists and educators from around the world look at the biodiversity, ecology, evolution, and conservation of forest canopy ecosystems. Comprehensive literature list State-of-the-art results and data sets from current field work Foremost scientists in the field of canopy ecology Expanded collaboration of researchers and international projects User-friendly format with sidebars and case studies Keywords and outlines for each chapter
A groundbreaking and surprising look at contemporary censorship in China As authoritarian governments around the world develop sophisticated technologies for controlling information, many observers have predicted that these controls would be easily evaded by savvy internet users. In Censored, Margaret Roberts demonstrates that even censorship that is easy to circumvent can still be enormously effective. Taking advantage of digital data harvested from the Chinese internet and leaks from China's Propaganda Department, Roberts sheds light on how censorship influences the Chinese public. Drawing parallels between censorship in China and the way information is manipulated in the United States and other democracies, she reveals how internet users are susceptible to control even in the most open societies. Censored gives an unprecedented view of how governments encroach on the media consumption of citizens.
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