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Ocean acidification (OA) is the decline in seawater pH and saturation levels of calcium carbonate (CaCO3) minerals that has led to concerns for calcifying organisms such as corals, oysters and mussels because of the adverse effects of OA on their biomineralisation, shells and skeletons. A range of cellular biology, geochemistry and materials science approaches have been used to explore biomineralisation. These techniques have revealed that responses to seawater acidification can be highly variable among species, yet the underlying mechanisms remain largely unresolved. To assess the impacts of global OA, researchers will need to apply a range of tools developed across disciplines, many of which are emerging and have not yet been used in this context. This review outlines techniques that could be applied to study OA-induced alterations in the mechanisms of biomineralisation and their ultimate effects on shells and skeletons. We illustrate how to characterise, quantify and monitor the process of biomineralisation in the context of global climate change and OA. We highlight the basic principles, as well as the advantages and disadvantages, of established, emerging and future techniques for OA researchers. A combination of these techniques will enable a holistic approach and better understanding of the potential impact of OA on biomineralisation and its consequences for marine calcifiers and associated ecosystems.

Structures --- techniques --- ocean acidification

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L’apparition des moulins dans le paysage s’est faite très tôt avec, sous l’Ancien Régime, une période d’activité dense et riche où le meunier a un rôle social très en vue dans le monde rural. À partir du xviiie siècle, les progrès techniques améliorent la productivité des moulins. Puis sous l’impulsion de la Révolution industrielle, l’introduction de la vapeur et/ou des turbines permet de moins dépendre du régime saisonnier des rivières. Le cœur des moulins : Archives départementales de la Gironde est issu d’une exposition présentée par les Archives départementales de la Gironde de novembre 2015 à mars 2016. Les contributions d’universitaires et d’érudits invitent à pénétrer au cœur d’une économie rurale et de réseaux de sociabilité développés autour de la mouture des céréales, de la vente des farines et des autres productions des moulins.

archive --- histoire des techniques

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Management and management techniques

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Forest management has evolved from a mercantilist view to a multi-functional one that integrates economic, social, and ecological aspects. However, the issue of sustainability is not yet resolved. Quantitative Techniques in Participatory Forest Management brings together global research in three areas of application: inventory of the forest variables that determine the main environmental indices, description and design of new environmental indices, and the application of sustainability indices for regional implementations. The book outlines a public participatory process to assess sustainability in forest management. It explores a new approach that links human and natural systems, reconsiders our interdependence with the diversity of life, and recognizes our role in a unique and complex system. The book also identifies quantitative indices that provide a vast amount of information on soil, landscape, and ecological functioning. It highlights the importance of these indices for public information programs on participatory processes and provides an operating procedure to identify the degree of convergence in the utility of multiple evaluators. The last chapter describes a downloadable computer application that integrates the techniques explained in the book. Users accessing the application are offered a map representing their preferred forest management plan in the study zone. They are also given a map with the results of their corresponding community of evaluators, including the numerical and qualitative data for both. The system stores a record of the visit, including the visitor's profile and responses, to progress towards the joint forest management plan. The quantitative techniques highlighted in this book create the basis for the development of scientific methodologies of participatory sustainable forest management. It details the methodology for the design of a forest management plan that best suits a specific preference system.

Forest --- Management --- Participatory --- Quantitative --- Techniques

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With the invention of eyeglasses around 1280 near Pisa, the mundane medium of glass transformed early modern optical technology and visuality. It also significantly influenced contemporaneous art, religion, and science. References to glass are found throughout the Bible and in medieval hagiography and poetry. For instance, glass is mentioned in descriptions of Heavenly Jerusalem, the Beatific Vision, and the Incarnation. At the same time, a well-known Islamic scientific treatise, which likened a portion of the eye’s anatomy to glass, entered the scientific circles of the Latin West. Amidst this complex web of glass-related phenomena early modern Italian artists used glass in some of their most important artworks but, until now, no study has offered a comprehensive consideration of the important role glass played in shaping the art of the Italian Renaissance. Seeing Renaissance Glass explores how artists such as Giotto, Duccio, Nicola Pisano, Simone Martini, and others employed the medium of glass—whether it be depictions of glass or actual glass in the form of stained glass, gilded glass, and transparent glass—to resonate with the period’s complex visuality and achieve their artistic goals. Such an interdisciplinary approach to the visual culture of early modern Italy is particularly well-suited to an introductory humanities course as well as classes on media studies and late medieval and early Renaissance art history. It is also ideal for a general reader interested in art history or issues of materiality.

Art techniques and principles --- Sculpture