preface xiii acknowledgments xiv about this book xvi about the authors xviii about the cover illustration xx data science in big data world benefits and uses of data science and big data facets of data structured data unstructured data natural language machine-generated data graph-based or network data audioimageand video streaming data the data science process setting the research goal retrieving data data preparation data exploration data modeling or model building presentation and automation the big data ecosystem and data science distributed file systems distributed programming framework data integration framework vii