823 resultados para PRINCIPLES AND ARISTOTELIAN CAUSES
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This brochure deals with policies and policy instruments needed to promote sustainable development in mountain areas. The first part presents an overview of key issues in mountain development, and principles and strategies that should be adopted. Each principle contains a checklist for policy-makers. The second part presents national and regional case studies of successful approaches and initiatives relating to mountain policy from all over the world. The brochure concludes with a call for multi-level initiatives and partnerships. This full-colour publication is part of the Mountains of the World series. It was prepared for the 2002 World Summit on Sustainable Development in Johannesburg by an international panel of experts coordinated by CDE. It was commissioned and funded by the Swiss Agency for Development and Cooperation (SDC).
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Genetic sediment types have been identified based on a study of Core PS1599 collected from the eastern continental slope of the Weddell Sea. XRF analysis of 48 samples from this core carried out at the Vernadsky Institute of Geochemistry and Analytical Chemistry (Moscow) yielded the first comprehensive geochemical characteristics of all genetic types. Methods of correlation and factor analyses were used to outline geochemical associations of sediments and examine causes of their formation including the role of grain size composition. The results obtained have revealed fundamental differences between sources, mechanisms, and methods of transportation of sedimentary material for Holocene sediments, on the one hand, and Weichselian sediments, on the other hand.
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Aim: Models project that climate warming will cause the tree line to move to higher elevations in alpine areas and more northerly latitudes in Arctic environments. We aimed to document changes or stability of the tree line in a sub-Arctic model area at different temporal and spatial scales, and particularly to clarify the ambiguity that currently exists about tree line dynamics and their causes. Location: The study was conducted in the Tornetrask area in northern Sweden where climate warmed by 2.5 °C between 1913 and 2006. Mountain birch (Betula pubescens ssp. czerepanovii) sets the alpine tree line. Methods: We used repeat photography, dendrochronological analysis, field observations along elevational transects and historical documents to study tree line dynamics. Results: Since 1912, only four out of eight tree line sites had advanced: on average the tree line had shifted 24 m upslope (+0.2 m/year assuming linear shifts). Maximum tree line advance was +145 m (+1.5 m/year in elevation and +2.7 m/year in actual distance), whereas maximum retreat was 120 m downslope. Counter-intuitively, tree line advance was most pronounced during the cooler late 1960s and 1970s. Tree establishment and tree line advance were significantly correlated with periods of low reindeer (Rangifer tarandus) population numbers. A decreased anthropozoogenic impact since the early 20th century was found to be the main factor shaping the current tree line ecotone and its dynamics. In addition, episodic disturbances by moth outbreaks and geomorphological processes resulted in descent and long-term stability of the tree line position, respectively. Main conclusions: In contrast to what is generally stated in the literature, this study shows that in a period of climate warming, disturbance may not only determine when tree line advance will occur but if tree line advance will occur at all. In the case of non-climatic climax tree lines, such as those in our study area, both climate-driven model projections of future tree line positions and the use of the tree line position for bioclimatic monitoring should be used with caution.
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Includes bibliographies.
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1. The United States General Accounting Office.--2. Accounting principles and standards and internal auditing guidelines.--3. Audit.--4. Claims--General.--5. Transportation.--6. Payroll, leave, and allowances.--7. Standardized fiscal procedures.--8. Management and services.--9. Accounting forms.
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"January 1985."
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half-vol. 1. The principles and performance of steam boilers. The principles and performance of steam engines.- half-vol. 2. The principles and performance of steam engines (continued) The construction of steam boilers.- half-vol. 3-4. The construction of steam engines.
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First ed. pub. in 1939 under title: Air conditioning, principles and practice.
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"Credit is largely due to Frank D. Graham ... for the authorship of the Guides, and for the original sketches illustrating electrical principles and construction."--Pref. to no. 1.
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"Prepared by Theodore A. Janssen, chief of the Nosology section."--p.1.
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"Designed as a guide for the laboratory portion of CDC Course No. 8440-C, ʻPrinciples and Bacterial Applications of Flourescent Antibody Techniquesʻ."
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Includes bibliographical references and index.
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Each individual t.p. has title: Causes politiques célèbres du XIXe siècle.
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"The Students' Lectures on Missions at Princeton Theological Seminary, which form the basis of the book now issued, were delivered by the author in the spring of 1896"--Preface.
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"Credit is largely due to Frank D. Graham ... for the authorship of the Guides, and for the original sketches illustrating electrical principles and construction." --Pref. to no. 1.