Over the concluding decades of the twentieth century, the historic preservation community increasingly turned its attention to modern buildings, including bungalows from the 1930s, gas stations and diners from the 1940s, and office buildings and architectural homes from the 1950s. Conservation efforts, however, were often hampered by a lack of technical information about the products used in these structures, and to fill this gap Twentieth-Century Building Materials was developed by the U.S. Department of the Interior’s National Park Service and first published in 1995. Now, this invaluable guide is being reissued—with a new preface by the book’s original editor. With more than 250 illustrations, including a full-color photographic essay, the volume remains an indispensable reference on the history and conservation of modern building materials. Thirty-seven essays written by leading experts offer insights into the history, manufacturing processes, and uses of a wide range of materials, including glass block, aluminum, plywood, linoleum, and gypsum board. Readers will also learn about how these materials perform over time and discover valuable conservation and repair techniques. Bibliographies and sources for further research complete the volume. The book is intended for a wide range of conservation professionals including architects, engineers, conservators, and material scientists engaged in the conservation of modern buildings, as well as scholars in related disciplines.

Class-tested and coherent, this textbook teaches classical and web information retrieval, including web search and the related areas of text classification and text clustering from basic concepts. It gives an up-to-date treatment of all aspects of the design and implementation of systems for gathering, indexing, and searching documents; methods for evaluating systems; and an introduction to the use of machine learning methods on text collections. All the important ideas are explained using examples and figures, making it perfect for introductory courses in information retrieval for advanced undergraduates and graduate students in computer science. Based on feedback from extensive classroom experience, the book has been carefully structured in order to make teaching more natural and effective. Slides and additional exercises (with solutions for lecturers) are also available through the book's supporting website to help course instructors prepare their lectures.

Carl Gustav Carus (1789-1869)--court physician to the king of Saxony--was a naturalist, amateur painter, and theoretician of landscape painting whose Nine Letters on Landscape Painting is an important document of early German romanticism and an elegant appeal for the integration of art and science. Carus was inspired by and had contacts with the greatest German intellectuals of his day. Carus prefaced his work with a letter from his correspondence with Johann Wolfgang von Goethe, who was his primary mentor in both science and art. His writings also reflect, however, the influence of the German natural philosopher Friedrich Wilhelm Joseph Schelling, especially Schelling's notion of a world soul, and the writings of the naturalist and explorer Alexander von Humboldt. Carus played a role in the revolution in landscape painting taking place in Saxony around Caspar David Friedrich. The first edition appears here in English for the first time.

"United States Department of Agriculture, Forest Service, Pacific Southwest Region"