Kirsten Jensen – författare
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3 produkter
3 produkter
Del 22 - International Union of Crystallography Texts on Crystallography
Atomic Pair Distribution Function Analysis
A Primer
Inbunden, Engelska, 2023
982 kr
Skickas inom 5-8 vardagar
Since the early 1990s the atomic pair distribution function (PDF) analysis of powder diffraction data has undergone something of a revolution in its ability to do just that: yield important structural information beyond the average crystal structure of a material. With the advent of advanced sources, computing and algorithms, it is now useful for studying the structure of nanocrystals, clusters and molecules in solution or otherwise disordered in space, nanoporous materials and things intercalated into them, and to look for local distortions and defects in crystals. It can be used in a time-resolved way to study structural changes taking place during synthesis and in operating devices, and to map heterogeneous systems.Although the experiments are somewhat straightforward, there can be a gap in knowledge when trying to use PDF to extract structural information by modelling. This book addresses this gap and guides the reader through a series of real life worked examples that gradually increase in complexity so the reader can have the independence and confidence to apply PDF methods to their own research and answer their own scientific questions. The book is intended for graduate students and other research scientists who are new to PDF and want to use the methods but are unsure how to take the next steps to get started.
E-bok
PDF, Engelska, 2023807 kr
Läs direkt efter köp
Since the early 1990s the atomic pair distribution function (PDF) analysis of powder diffraction data has undergone something of a revolution in its ability to do just that: yield important structural information beyond the average crystal structure of a material. With the advent of advanced sources, computing and algorithms, it is now useful for studying the structure of nanocrystals, clusters and molecules in solution or otherwise disordered in space, nanoporous materials and things intercalated into them, and to look for local distortions and defects in crystals. It can be used in a time-resolved way to study structural changes taking place during synthesis and in operating devices, and to map heterogeneous systems.Although the experiments are somewhat straightforward, there can be a gap in knowledge when trying to use PDF to extract structural information by modelling. This book addresses this gap and guides the reader through a series of real life worked examples that gradually increase in complexity so the reader can have the independence and confidence to apply PDF methods to their own research and answer their own scientific questions. The book is intended for graduate students and other research scientists who are new to PDF and want to use the methods but are unsure how to take the next steps to get started.
Häftad, Engelska, 2005
344 kr
Skickas inom 5-8 vardagar
As cultural documents, as works of art, and as historical records, photographs of 1930s Arizona tell a remarkable story. They capture enduring visions of the Depression that linger in cultural memory: dust storms, Okies on their way to California, breadlines, and ramshackle tent cities. They also reflect a more particular experience and a unique perspective. This book places the work of local Arizonans alongside that of federal photographers both to illuminate the impact of the Depression on the state's distinctive racial and natural landscapes and to show the influence of differing cultural agendas on the photographic record. The more than one hundred images by well-known photographers such as Dorothea Lange and Laura Gilpin as well as by an array of less familiar photographers?represent a variety of purposes and perspectives, from public to personal, political to promotional. Six essays and three photo-essays bring together prominent authorities in history, the arts, and other fields who provide diverse perspectives on this period in Arizona and American history.Viewed together, the words and images capture a Depression-era Arizona bustling with activity as federally funded construction projects and seasonal agricultural jobs brought migrants and newcomers to the state. They convey the celebrations and the struggles of commercial photographers, archaeologists, city folks, farmers, tourists, native peoples and others in these hard times. As the economic strains of the decade reverberated through the state, local photographers documented the lives of Arizona residents?including those frequently overlooked by historians. As this book persuasively shows, photographs can conceal as much as they reveal. A young Mexican American girl stands in front of a backdrop that hides the outhouse behind her, a deeply moving image for what it suggests about the efforts of her family to conceal their economic circumstances. Yet this image is a perfect metaphor for all the photographs in this book: stories remain hidden, but when viewers begin to question what they cannot see, pictures resonate more loudly than ever before. This book is a history of Arizona written from the photographic record, offering a point of view that may differ from the written record.From the images and the insights of the authors, we can gain a new appreciation of how one state, nd its indomitable people?weathered our nation's toughest times.