Results 1 - 10 of 1177
Results 1 - 10 of 1177. Search took: 0.025 seconds
|Sort by: date | relevance|
[en] This book describes meteorological history of Korea for a century. It consists of eleven chapters, which deals with the ancient history of meteorologic services, the beginning of modem history of meteorologic services from 1894 to 1910, meteorologic services in Japanese colonial era, meteorologic services in the U. S Military Government in Korea from 1945 to 1948, transition period from 1948 to 1950, Korean war period from 1950 to 1953, foundation construction period from 1953 to 1960, growth period in 1970s'. period of development in 1980s' foundation construction period for advanced technologies of meteorologic services in 1990s' and leaping period of meteorologic services in 2000s'.
[en] Complete text of publication follows. A. von Humboldt and C. F. Gauss were the most prominent German scientists of their time: one being the last universally educated scientists, involved in describing all kinds of natural phenomena and one being the modern mathematician and physicist, interested in the deductive analysis. The study of the Earth's magnetic field was one of their common interests. In his research on geomagnetism von Humboldt was interested in the method developed by Gauss to represent the geomagnetic fields in terms of potentials and to provide a separation of sources in internal and external ones. Gauss' pioneering modeling efforts with their developments to the modern time can be seen as a more fundamental contribution than von Humboldt's work in organising a worldwide cooperation to gather magnetic data. However, the first quart of the 19th century brought tremendous improvements in measuring and describing the magnetic field, and both the A. von Humboldt and C. F. Gauss measurements and studies were crucial. The maps describing the global behaviour of the declination, inclination and total intensity of the geomagnetic field at that time, is the most convincing argument.
[en] The double objective of this lecture is to commemorate, on the occasion of its golden jubilee, the work performed by the Spanish Society of Ceramics and Glass and to pay a special homage to the memory of its main promoter and supporter, Professor Antonio Garcia Verduch. Since its foundation in 1960 the Society has contributed to join all the experts in ceramics and glass, as well as to promote and spread among them scientific and technical knowledge related to both areas, while adapting itself to the investigation trends of each moment in time and to the interests of the different industrial sectors. Along its half century of history it has organized some hundred and twenty-five national congresses and specialized technical meetings and nine national congresses. It represents Spain in five international associations. The Society's main contribution, together with its international activities, has been the uninterrupted publication of its bimonthly magazine, the Society's Bulletin, which since 1999 is included in the database of the Science Citation Index. Furthermore, the Society keeps a permanent relationship with investigation centres, universities, museums, technicians and manufacturers associations and fairground institutions. As a sign of its promotion of technical development, the Society grants every year since 1977 its Alfa de Oro Awards to the most outstanding industrial products shown in the Valencia Fair, in order to highlight quality, technological innovation and design. In 1999 the Society's Electroceramics group created the Epsilon de Oro Awards which are granted every two years to the people or institutions that have produced the main scientific contribution in a given field. (Author).
[en] The ''Société Géologique du Nord'', located in Lille, in northern France, was founded in 1870, with Jules Gosselet as the first president. It has always been closely connected to the geology department of the Faculty of Sciences of Lille, now called the ''Université de Lille Sciences et Technologies'', and keeps strong links with the Natural History Museum of Lille. Its activities and evolution were closely related to those of the coal-mining basin of the area until the last shaft was closed in 1990. Its activities are both in the fields of applied and fundamental geosciences. From its beginning, the Society has published the results of the research of its members, both in a periodical journal, the Annales, and as monographies called Mémoires. From the 1970s, the Mémoires have been progressively replaced by Publications, mostly devoted to State doctoral theses. During the transition from the 20th to the 21st century, the activities of the Society have strongly declined, due to several internal and external factors. Since the beginning of the 21st century, the SGN has tried to adapt itself to the new conditions of both the university and the regional territory. It is still a scientific society, but it is open to its social environment. (Author)
[fr]La « Société Géologique du Nord » tiene su sede en Lille, en el norte de Francia. Se fundó en 1870, con Jules Gosselet como primer presidente. Siempre ha estado vinculada al Departamento de Geología de la Facultad de Ciencias de Lille, actualmente Université de Lille – Sciences et Technologies, y mantiene fuertes vínculos con el Museo de Historia Natural de Lille. Sus actividades y su evolución han estado relacionadas con las de la cuenca minera (hullera) de la región, hasta que, en 1990, cerró el último pozo de mina. Sus intereses son, a la vez, en el campo de las geociencias fundamentales y aplicadas. Desde su fundación, la Sociedad ha publicado los resultados de los trabajos de sus miembros tanto en una publicación periódica, los Annales, como en una serie de monografías, las Mémoires. A partir de los años 1970 las Mémoires han sido reemplazadas progresivamente por las Publications, que han sido esencialmente dedicadas a las tesis de doctorado. En la transición entre los siglos XX y XXI, las actividades de la Sociedad han disminuido gravemente debido a factores internos y externos. Desde comienzos del siglo XXI, la SGN intenta adaptarse a las nuevas circunstancias regionales y universitarias. Aunque en la actualidad continúa siendo una sociedad científica, tiene en cuenta su entorno social. (Author)
[en] The history of geochronology in Ghana is traced. This has been divided into two main periods. The first is the time interval between 1954 and 1978 when all radiometric age determinations of Ghanaian rocks were completely undertaken outside Ghana. The second is the period beginning with the date when the first age was produced entirely locally till the present. Details of the set-up of the geochronology laboratory in Ghana are given, pointing out the main difficulties. The relevance of radiometric age data to the understanding of the geology of Ghana is discussed together with a catalogue and review of up-to-date age data for Ghana. (author)
[en] In Gol-e-Gohar metamorphic Complex from south-eastern Sanandaj-Sirjan metamorphic zone (Kerman province, Iran), there are two types of metabasites contain layered metamorphosed lava flows and the younger meta-gabbros. The protoliths formed in the Paleozoic era and were metamorphosed during the early Cimmerian orogenic phase in the late Triassic, under temperatures of 640–680ºC and pressures of ~7–10.5kbar (amphibolite facies). These rocks are garnet-bearing amphibolites, garnet free amphibolites and metamorphosed gabbros. Many mineralogical and chemical aspects of these metabasites are similar, although the layered metabasites show tholeiitic and the meta-gabbros depict alkaline affinities. Evidences such as whole rock geochemical characteristics, Sr and Nd isotopic data, (143Nd/144Ndinitial=0.511913–0.512067; εNd550Ma=-0.31–2.68), relatively flat patterns of chondritenormalized Rare Earth Elements and multi-elemental diagrams, the enrichment in TiO2 (average content ~2.16) and high Zr/Y ratios (3–8), indicate that all of Gol-e-Gohar metabasites are formed in an extentional intracontinental rift zone from tholeiitic to alkaline magmas. The data suggest that the paren magmas could derived by low degrees of partial melting of spinel-lherzolite sources in subcontinental lithospheric mantle. These evidences confirm the existence of extentional environments in southern part of the Sanandaj-Sirjan metamorphic zone in the Paleozoic era, when large extensional depressions developed in the Sanandaj-Sirjan metamorphic zone and underlying asthenosphere ascent and partially melted during this time. Gradually, thick sequences of continental detritic sediments and tholeiitic lava flows accumulated in these troughs. Subsequent magmatic event in the area characterizes by emplacement of alkaline gabbro intrusions. At the early Cimmerian orogeny, these sedimentaryigneous rocks associations metamorphosed and the Gol-e Gohar metabasites formed.
[en] This article reviews the formation of uranium and uranium deposits. Beginning with the big bang and nucleosynthesis and the later creation of the Earth, the author addresses mechanisms for the formation of uranium deposits on the planet and discusses these processes in the context of known deposits. This understanding offers the opportunity to increase the efficiency of exploration for new economically exploitable deposits
[en] Complete text of publication follows. Alexander von Humboldt was a major figure in the worldwide establishment of magnetic observatories. His influence was felt in the early geomagnetic programmes of European nations, for example in Germany, Britain and its then colonies, as well as in Russia and beyond. In this paper we will review von Humboldt's role in the 'Gottingen Magnetic Union' and in the 'Magnetic Crusade' and we will examine his relationship with such figures as Edward Sabine in Britain and with Carl Friedrich Gauss and Wilhelm Weber in Germany. We will review the sequence of historical events that led to the establishment of magnetic observatories and their operating procedures in the mid 1800s. We will also reflect on the concurrent scientific and technical developments at the time and the wider cultural aspects of the 1800s that contributed to the development of the science of Geomagnetism. Ultimately, von Humboldt's vision was of a global network of magnetic observatories. Much of what was established in the mid 1800s, through his encouragement, can be seen to persist through to the modern day.