The burgeoning demand on the world food supply, coupled with concern over the use of chemical fertilizers, has led to an accelerated interest in the practice of precision agriculture. This practice involves the careful control and monitoring of plant nutrition to maximize the rate of growth and yield of crops, as well as their nutritional value.

Stone is one of the oldest building materials, and its conservation ranks as one of the most challenging in the field. The use of alkoxysilanes in the conservation of stone can be traced as far back as 1861, when A. W. von Hoffman suggested their use for the deteriorating limestone on the Houses of Parliament in London. Alkoxysilane-based formulations have since become the material of choice for the consolidation of stone outdoors.^l This volume, the first to cover comprehensively alkoxysilanes in stone consolidation, synthesizes the subject's vast and extensive literature, which ranges from production of alkoxysilanes in the nineteenth century to the extensive contributions from sol-gel science in the 1980s and 90s. Included are a historical overview, an annotated bibliography, and discussions of the following topics: the chemistry and physics of alkoxysilanes and their gels; the influence of stone type; commercial and noncommercial formulations; practice; lab and field evaluation of service life; and recent developments. This book is designed for conservators, scientists, and preservation architects in the field of stone conservation and will also serve as an indispensable introduction to the subject for students of art conservation and historic preservation.

Illustrated with plans, maps, and new and historic photographs, the second edition of Worthy of the Nation provides researchers and general readers with an appealing and authoritative view of the planning and evolution of the federal district.

Regular physical activity is proven to help prevent and treat noncommunicable diseases (NCDs) such as heart disease stroke diabetes and breast and colon cancer. It also helps to prevent hypertension overweight and obesity and can improve mental health quality of life and well-being. In addition to the multiple health benefits of physical activity societies that are more active can generate additional returns on investment including a reduced use of fossil fuels cleaner air and less congested safer roads. These outcomes are interconnected with achieving the shared goals political priorities and ambition of the Sustainable Development Agenda 2030. The new WHO global action plan to promote physical activity responds to the requests by countries for updated guidance and a framework of effective and feasible policy actions to increase physical activity at all levels. It also responds to requests for global leadership and stronger regional and national coordination and the need for a whole-of-society response to achieve a paradigm shift in both supporting and valuing all people being regularly active according to ability and across the life course. The action plan was developed through a worldwide consultation process involving governments and key stakeholders across multiple sectors including health sports transport urban design civil society academia and the private sector.

Washington, D.C., conjures images of marble monuments, national memorials, and world-class museums. To many, the world beyond the National Mall is invisible. Yet within an area of only 68 square miles lies a residential city of diversity, beauty, and charm. In the long-awaited update of her 1988 classic Washington at Home, Kathryn Schneider Smith and a team of historians, journalists, folklorists, museum professionals, and others who know the city intimately offer a fresh look at the social history of this intriguing city through the prism of 26 diverse neighborhoods. Lavishly illustrated with engaging historical photographs and maps, Washington at Home introduces readers to the famous residents, colorful characters, distinct flavors, and important events that helped shape the city beyond the federal façade. This second edition adds six new neighborhoods from all parts of the city. Extensive notes make the book invaluable for those doing their own research as well as the more casual reader. Journalists, historians, politicians, residents, real estate agents, and students regularly consult Washington at Home as the standard resource on the social history of Washington, D.C. This expanded and updated edition will appeal to residents, both new and old, as well as to visitors eager to deepen their experience in the nation’s capital.