Oiseaux et changement global
Chez les oiseaux, les changements environnementaux ont un impact sur leur distribution, leur abondance et sur les mécanismes démographiques, physiologiques et comportementaux. Richement illustré, cet ouvrage présente de manière claire, mais scientifiquement fondée, le pour et le contre des nouveaux cadres de vie auxquels les oiseaux sont confrontés, ainsi que certains des mécanismes qui leur permettent de s’y adapter.
The Revolution of Everyday Life
Naming and defining the alienating features of everyday life in consumer society, an impassioned critique of modern capitalism argues that the countervailing impulses that exist within deep alienation present an authentic alternative to nihilistic consumerism. Original.
Economics and Ecology of Diversification
The monoculture systems that have been encouraged by governments since the 1960s have led to major socio-economic and environmental crises. Now the diversification of tree crop systems is advancing throughout the tropics. Why and when does diversification take place? What categories of farmers diversify? What obstacles do they have to overcome, and how do public and private policies interfere in this process? How do land use systems and landscapes evolve as a result of this diversification? According to the authors of this volume, diversification is certainly a response to market risks, but also to the depletion of environmental resources. Ecological changes such as declining soil fertility and increasing pressure from pests, diseases and weeds intensify at the end of monoculture cycles, driving crop change and diversification of farming systems. Through 15 case studies from Africa, Latin America, Asia and the Pacific, the authors provide us with in-depth insights into the economy and ecology of family agriculture and its recent developments.
In the first section dedicated to theoretical thoughts on comparative agriculture, Hubert Cochet introduces the notion of “agricultural development”, the very subject of comparative agriculture, with a restored endogenous dimension. He then describes how this approach was slowly consolidated, around the concept of agrarian system in particular. The comparison of agricultural transformations in time and space highlights the importance of the comparatist approach to production processes, their trajectories and differentiation on a worldwide scale. The second section which focuses on the methods and expertise of comparative agriculture, tackles the issues of landscape analysis, field surveys and the historical approach underlying comparative agriculture. It sums up the economic tools mobilised as well as the evaluation perspectives opened up by comparative agriculture.
Polarized Light in Animal Vision
The subject of this volume is two-fold. First, it gathers typical polarization patterns occurring in nature. Second, it surveys the polarization-sensitive ani mals, the physiological mechanisms and biological functions of polarization sensitivity as weIl as the polarization-guided behaviour in animals. The monograph is prepared for biologists, physicists and meteorologists, espe cially for experts of atmospheric optics and animal vision, who wish to under stand and reveal the message hidden in polarization patterns of the optical environment not directly accessible to the human visual system, but measur able by polarimetry and perceived by many animals. Our volume is an attempt to build a bridge between these two physical and biological flelds. In Part I we introduce the reader to the elements of imaging polarimetry. This technique can be efflciently used, e. g. in atmospheric optics, remote sens ing and biology. In Part 11 we deal with typical polarization patterns of the natural optical environment. Sunrise/sunset, clear skies, cloudy skies, moonshine and total solar eclipses all mean quite different illumination conditions, wh ich also affect the spatial distribution and strength of celestial polarization. We pre sent the polarization patterns of the sky and its unpolarized (neutral) points under sunlit, moonlit, clear, cloudy and eclipsed conditions as a function of solar elevation. The polarization pattern of a rainbow is also shown. That part of the spectrum is derived in which perception of skylight polarization is optimal under partly cloudy skies.
Review and Integration of Biosphere Atmosphere Modelling of Reactive Trace Gases and Volatile Aerosols
When considering biosphere-atmosphere exchange of trace gases and volatile aerosols, significant advances have been made both from an experimental and modelling point of view and on several scales. This was particularly stimulated by the availability of new datasets generated from improvements in analytical methods and flux measurement techniques. Recent research advances allow us, not only to identify major mechanisms and factors affecting the exchanges between the biosphere and the atmosphere, but also to recognize several gaps in the methodologies used in accounting for emissions and deposition in landscape and global scale models. This work aims at (i) reviewing exchange processes and modelling schemes, parameterisations and datasets, (ii) presenting a common conceptual framework to model soil-vegetation-atmosphere exchange of reactive trace gases and aerosols accounting for in-canopy transfer chemical interactions and (iii) discussing the key elements of the agreed framework. .
Many of the earliest books, particularly those dating back to the 1900s and before, are now extremely scarce and increasingly expensive. We are republishing these classic works in affordable, high quality, modern editions, using the original text and artwork.
Breakdown of Nations
Leopold Kohr A été écrit sous une forme ou une autre pendant la plus grande partie de sa vie. Vous pouvez trouver autant d'inspiration de Breakdown of Nations Aussi informatif et amusant. Cliquez sur le bouton TÉLÉCHARGER ou Lire en ligne pour obtenir gratuitement le livre de titre $ gratuitement.
The R C Car Bible
Robert H. Schleicher A été écrit sous une forme ou une autre pendant la plus grande partie de sa vie. Vous pouvez trouver autant d'inspiration de The R C Car Bible Aussi informatif et amusant. Cliquez sur le bouton TÉLÉCHARGER ou Lire en ligne pour obtenir gratuitement le livre de titre $ gratuitement.
2016 will be one of the most historic years in politics: It marks the potential for the first female President of the United States, and the 100th anniversary of the first woman elected to Congress. Additionally, in 2016, single women will be one of the most pivotal voting groups heading into the general election, being courted by both Democrats and Republicans.
At the centennial of the first woman elected to Congress (which was three years before women legally earned the right to vote), their presence and influence in Washington has reached a tipping point that affects not only the inner workings of the Federal Government, but also directly influences how Americans live and work.
Never before have women been represented in such great numbers in the Supreme Court, both chambers of Congress, and in the West Wing. In Broad Influence, Jay Newton-Small, one of the nation's most deeply respected and sourced journalists takes readers through the corridors of Washington D.C., the offices and hallways of Capital Hill and everywhere else conversations and deals are happening to demonstrate how women are reaching across the aisles, coalescing, and affecting lasting change.
With deep, exclusive and behind-closed-doors reporting and interviews, including conversations with Nancy Pelosi, Barbara Mikulski, Kirsten Gillibrand, Valerie Jarrett, Sarah Palin, Kelly Ayotte, Cathy McMorris Rogers and dozens of other former and current senators, representatives, senior White House staffers, governors and cabinet members, Broad Influence is an insightful look at how women are transforming government, politics, and the workforce, and how they are using that power shift to effect change throughout America.