990 resultados para Conquest of Mexico
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This layer is a georeferenced raster image of the historic paper map entitled: Explorations of the U. S. Fish Commission steamer Albatross : Lieut. Comdr. Z. L. Tanner U.S.N. Comdg. : Februrary to April 1891. It was printed for the Museum of Comparative Zoology, Harvard University in 1892. Scale [ca. 1:7,500,000]. Covers the Pacific Coast of Mexico, Central America, and the region around the Galapagos Islands. The image inside the map neatline is georeferenced to the surface of the earth and fit to the 'Mercator' projection. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as drainage, human settlements, shoreline features, bays, harbors, islands, and more. Relief shown by soundings and bathymetric isolines and tints. Shows the route of the Agassiz-Albatross Cruise 1891. This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection and the Harvard University Library as part of the Open Collections Program at Harvard University project: Organizing Our World: Sponsored Exploration and Scientific Discovery in the Modern Age. Maps selected for the project correspond to various expeditions and represent a range of regions, originators, ground condition dates, scales, and purposes.
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Résumé. Le traité de Lisbonne a procédé à une importante réforme de la comitologie, en établissant deux catégories d’instruments: les actes d’exécution et les actes délégués. Pour ces derniers, le Parlement européen a obtenu des pouvoirs importants et est pour la première fois sur un strict pied d’égalité avec le Conseil dans le système exécutif. En vertu d’une approche institutionnaliste rationnelle, cet article analyse comment le Parlement, à l’origine exclu du système, est parvenu à acquérir les pouvoirs qui sont formellement les siens aujourd’hui. Ensuite, l’action du Parlement face à ses nouveaux pouvoirs dans le cadre des actes délégués est abordée. Il s’agit d’étudier comment le Parlement défend ses prérogatives dans les relations interinstitutionnelles et agit après l’acquisition de nouvelles prérogatives. Cette analyse permet plus globalement d’aborder des aspects essentiels du fonctionnement du Parlement européen, de l’Union européenne ainsi que ses dynamiques (inter)institutionnelles.
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The grain sizes of gas hydrate crystallites are largely unknown in natural samples. Single grains are hardly detectable with electron or optical microscopy. For the first time, we have used high-energy synchrotron diffraction to determine grain sizes of six natural gas hydrates retrieved from the Bush Hill region in the Gulf of Mexico and from ODP Leg 204 at the Hydrate Ridge offshore Oregon from varying depth between 1 and 101 metres below seafloor. High-energy synchrotron radiation provides high photon fluxes as well as high penetration depth and thus allows for investigation of bulk sediment samples. Gas hydrate grain sizes were measured at the Beam Line BW 5 at the HASYLAB/Hamburg. A 'moving area detector method', originally developed for material science applications, was used to obtain both spatial and orientation information about gas hydrate grains within the sample. The gas hydrate crystal sizes appeared to be (log-)normally distributed in the natural samples. All mean grain sizes lay in the range from 300 to 600 µm with a tendency for bigger grains to occur in greater depth. Laboratory-produced methane hydrate, aged for 3 weeks, showed half a log-normal curve with a mean grain size value of c. 40 µm. The grains appeared to be globular shaped.
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Paleomagnetic analyses of the natural remanent magnetization of >1700 vertically oriented sediment samples from Integrated Ocean Drilling Program (IODP) Holes U1319A, U1320A, U1322B, and U1324B in the northern Gulf of Mexico reveal complex magnetostratographic signals for the Brazos-Trinity and Ursa region carried by detrital iron oxide minerals. Additionally, gyroremanent magnetization was observed to form during alternating-field demagnetization of samples containing an enhanced amount of magnetic iron sulfide minerals. Most characteristic remanent magnetization inclinations are reasonable for the site latitudes. Stable declinations allow for azimuth correction of the formerly unoriented drill cores.
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On t.-p.: No. 495.
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Mode of access: Internet.
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Vol. for 1916 issued with title: Annual proceedings.
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Mode of access: Internet.
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Mode of access: Internet.
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No. 1-8.
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Mode of access: Internet.
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Mode of access: Internet.