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Sprache: Deutsch Broschur 8; ; 522 Seiten; Bibliotheksstempel auf Rückseite Haupttitel - sonst tadellos; viele Tabellen, technische Zeichnungen, Fotografien farbig und s/w; Ouvrage realise sous la direction de Peter Munzinger - La Traction Animale en Afrique: Situation, perspectives et facteurs limitants; etude des facteurs Intervenant dans l emploi de la traction animale; Etudes de cas - - -.…

Zustand: Nuevo. As contribuições reunidas neste volume evidenciam, com competência e sobriedade, as virtudes e os méritos, igualmente raros, de um pensador político eminente. Depois da sua morte, em 1983, tanto amigos como adversários podiam pensar que a estrela de Raymond Aron estava condenada a empalidecer, ao mesmo tempo que desaparecia a ordem ou desordem política que este contribuíra tanto para esclarecer. O fim do comunismo, assim como da Guerra Fria que era a sua consequência, far-nos-iam entrar num mundo novo onde a democracia estaria definitivamente assegurada, e que teria necessidade, principalmente, de «teorias normativas da democracia», engenhosamente deduzidas, em vez de uma sabedoria política adquirida através da experiência. Os eventos do 11 de Setembro varreram cruelmente essas sedutoras ilusões. Fomos de novo confrontados com a tragédia da História. Raymond Aron, perfeitamente informado dos diferentes «procedimentos» ou processos que traziam a paz, o conforto e a organização racional vida do homem moderno, sabia também que era necessário reservar um lugar incerteza, aos acidentes, desordem, em suma, ao «drama» da história humana. Por mais impressionantes que sejam os feitos da ciência, da economia e da política modernas, não salvam os seres humanos dos riscos û a grandeza e a miséria û da vida política. Raymond Aron escrevia para tempos conturbados. Os seres humanos não podem ignorar, durante muito tempo, que vivem sempre em tempos conturbados. Os autores das contribuições que se seguem são originários de vários países europeus e dos Estados Unidos da América. Estas ilustram a amplitude da atração que exerce o pensamento de Raymond Aron, uma atração que por sua vez, contribuem para expandir e tornar mais viva. Pierre Manent (do Prefácio).…

Taschenbuch. Zustand: Neu. Macrophytes in Aquatic Ecosystems: From Biology to Management | Proceedings of the 11th International Symposium on Aquatic Weeds, European Weed Research Society | J. M. Caffrey (u. a.) | Taschenbuch | xii | Englisch | 2010 | Springer | EAN 9789048173587 | Verantwortliche Person für die EU: Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg, juergen[dot]hartmann[at]springer[dot]com | Anbieter: preigu.…

Buch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - Macrophytes and macrophytes ecology have gained an added importance with the introduction of, and legal requirement to implement, the European Water Framework Directive. This reflects the valuable role that aquatic plant communities play in assessing the ecological status of water bodies. Significant changes in the status and general abundance of these communities has been recorded in the last three decades, consequent on such factors as global warming and, increasingly, on the spread of aggressive alien species. These changes have been most felt in those waters that are exploited for amenity and recreational pursuits.The increased biomass of aquatic vegetation in water bodies has adversely impacted on leisure use of these systems but also on their use for agricultural, flood relief, municipal and domestic purposes. The loss to national economies resulting from this excessive plant biomass has been appreciable and has put pressure on water managers to develop weed control procedures that are efficient, environmentally sensitive and cost-effective. The results from the most up-to-date research activities and field trials of leading aquatic plant scientists and managers in all five continents, aimed at resolving these weed problems, has been drawn together in this volume.The title of this special issue, 'Macrophytes in aquatic ecosystems: from biology to management', is wide-ranging and reflects the broad scope and scale of the papers presented therein. It further recognises the old paradigm: 'knowledge to achieve management and management to achieve knowledge'.…

Taschenbuch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - Macrophytes and macrophytes ecology have gained an added importance with the introduction of, and legal requirement to implement, the European Water Framework Directive. This reflects the valuable role that aquatic plant communities play in assessing the ecological status of water bodies. Significant changes in the status and general abundance of these communities has been recorded in the last three decades, consequent on such factors as global warming and, increasingly, on the spread of aggressive alien species. These changes have been most felt in those waters that are exploited for amenity and recreational pursuits.The increased biomass of aquatic vegetation in water bodies has adversely impacted on leisure use of these systems but also on their use for agricultural, flood relief, municipal and domestic purposes. The loss to national economies resulting from this excessive plant biomass has been appreciable and has put pressure on water managers to develop weed control procedures that are efficient, environmentally sensitive and cost-effective. The results from the most up-to-date research activities and field trials of leading aquatic plant scientists and managers in all five continents, aimed at resolving these weed problems, has been drawn together in this volume.The title of this special issue, 'Macrophytes in aquatic ecosystems: from biology to management', is wide-ranging and reflects the broad scope and scale of the papers presented therein. It further recognises the old paradigm: 'knowledge to achieve management and management to achieve knowledge'.…

Paperback. Zustand: Brand New. 275 pages. 10.00x7.60x0.65 inches. In Stock.

Zustand: Nuevo. La pensée de Raymond Aron Essais et interprétations editado por Principia.