508 research outputs found

    Middle school students' perceptions of engineering

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    This paper focuses on implementing engineering education in middle school classrooms (grade levels 7-9). One of the aims of the study was to foster students’ and teachers’ knowledge and understanding of engineering in society. Given the increasing importance of engineering in shaping our daily lives, it is imperative that we foster in students an interest and drive to participate in engineering education, increase their awareness of engineering as a career path, and inform them of the links between engineering and the enabling subjects, mathematics, science, and technology. Data for the study are drawn from five classes across three schools. Grade 7 students’ responded to initial whole class discussions on what is an engineer, what is engineering, what characteristics engineers require, engineers (family/friends) that they know, and subjects that may facilitate an engineering career. Students generally viewed engineers as creative, future-oriented, and artistic problem finders and solvers; planners and designers; “seekers” and inventors; and builders of constructions. Students also viewed engineers as adventurous, decisive, community-minded, reliable, and “smart.” In addition to a range of mathematics and science topics, students identified business studies, ICT, graphics, art, and history as facilitating careers in engineering. Although students displayed a broadened awareness of engineering than the existing research suggests, there was limited knowledge of various engineering fields and a strong perception of engineering as large construction

    The amygdala, catecholamines and conditioned behaviour.

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    Seronegative spondyloarthropathies : a review : part I: classification and differential diagnosis

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    The seronegative spondyloarthropathies comprise a group of non-rheumatoid disorders with similar clinical, laboratory and genetic features. Recognition of new clinical features has supported the notion that they all form part of a clinical spectrum. These features and the classification of the seronegative spondyloarthropathies are discussed in the review.peer-reviewe

    Seronegative spondyloarthropathies : a review : part II: genetics and pathogenesis

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    In none of the spondyloarthropathies is the pathogenesis well understood. Much of the investigation into the aetio-pathogenesis of these diseases has focused on the association with HLA-B27 and the known triggering potential of certain infectious agents. In this article the author describes that the HLA linked genes which is subdivided into three groups, class I, class II and class III, which are structurally and functionally distinct from each other.peer-reviewe

    Historical Records and Relics from the North Greenland Coast

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    Reports recovery of nine records during geological reconnaissance by the Danish party of Operation Grant Land 1966, organized by the Geological Survey of Canada. The oldest is an 1876 copy of a record from 1871, the youngest dates from 1921. Records and relics from the US North Polar Expedition, 1871-73, British Arctic Expedition, 1875-76, US Lady Franklin Bay Expedition, 1881-84, Danish 2nd Thule Expedition, 1916-18, and Danish Bicentenary Jubilee Expedition, 1920-23, are included.Documents et historiques de la côte nord du Groënland. L'auteur rapporte la découverte récente, sur la côte peu fréquentée du nord du Groënland, de neuf documents historiques et de vestiges qui leur sont associés. Le matériel provient de cinq expéditions arctiques de la fin du 19e siècle et du début du 20e, dans la région du chenal de Robeson. On a reproduit en facsimilé des pages de deux de ces documents.&nbsp

    Per Schei (1875-1905)

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    Per Schei, Norwegian geologist and explorer, died a young man. From 1898 to 1902, as a member of Captain Otto Sverdrup's second expedition in the Fram, Schei made his mark on the geological understanding of a vast region of the eastern Canadian High Arctic. Schei died before he could write a detailed report for publication, but by the time of his death, his status as a talented scientist and outstanding expedition man was established. ... In collaboration with Nansen, Sverdrup had decided to explore northernmost Greenland, and possibly to circumnavigate the subcontinent. Using the so-called Smith Sound route, Sverdrup was to direct Fram up the narrow channels separating Greenland and Ellesmere Island and winter in Greenland as far north as possible. These channels, now known as Nares Strait, had been explored by British and American expeditions since the 1850s. Sledge parties from Fram were to delimit the northern part of Greenland and to reach as far south down the east coast as possible. ... However, the Norwegian thrust north in the summer of 1898 was stopped by unfavourable ice conditions in Kane Basin. ... Another attempt the following summer to negotiate Kane Basin was thwarted by ice, and following this Sverdrup sailed Fram southward and westward into Jones Sound to spend the next three winters in southern Ellesmere Island. This was a fortunate decision: it led to the discovery and charting of "New Land" west of Ellesmere Island. Up north, it was left to Peary to prove the insularity of Greenland, in 1900. ... Schei took to expedition life quickly but not without mishap. After an episode of frostbite during early sledging on Bache Peninsula, which necessitated amputation of several toes on each foot, Schei developed into one of the most skillful dogsledge handlers and hunters on the expedition. His courage and dedication could not be overwhelmed by such small disabilities as a stiff leg, lost toes, and short-sightedness. ... Sverdrup's well-organized and coordinated team work produced results unsurpassed in arctic exploration; the group of islands now named the Sverdrup Islands - Axel Heiberg, Ellef and Amund Ringes, King Christian, and smaller islands - were discovered and mapped, and the entire western coast of Ellesmere Island and much of northern Devon Island were charted. Schei participated in some of the longest and most arduous sledge journeys, for example a trip with Sverdrup, during the final sledging campaign of 1902, northward up Nansen Sound to reach the Arctic Ocean and the northwestern tip of Ellesmere Island. ... The geographic and scientific advances achieved by Sverdrup's expedition rank it as one of the most successful in the history of arctic exploration, and Schei returned with a rich geological and paleontological collection from a hitherto unknown region. ... Schei's preliminary accounts appeared in 1903 in several languages, and these papers, although only a few pages each, were regarded by his contemporaries as forming some of the most important contributions ever made to arctic geology. Aware of the mammoth task of dealing with the extensive collection, Schei induced a number of specialists in Europe to identify and systematically describe the fossil assemblages. Only one treatise appeared in Schei's lifetime, but by 1917 ten geological reports had been completed, and Professor Olav Holtedahl concluded the four-volume work with a summary report based on Schei's diaries. One can only wonder how much greater Schei's contribution to arctic geology would have been had he lived. Professor W.C. Brogger noted Schei's decline in health early in 1905. ... Schei died of dropsy, a result of kidney malfunction that was thought at the time to be related to the four strenuous years in the far North. ... Schei can be credited with making the most impressive contribution by a single person to the geological understanding of the Arctic Islands prior to the advent of aircraft

    Kennedy Channel and its geophysical lineaments: new evidence that the Wegener Fault is a myth

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    2010, the year under review, marks the centennial of perhaps the most controversial structure in the Arctic: the Wegener Fault, the 1000-km long fracture that is supposed to underlie Nares Strait and define the north-western margin of an independent Greenland plate (Fig. 1). The seaway between Greenland and Ellesmere Island, Canada, was branded a megashear by Frank Taylor who, purely on physiographic expression, postulated massive Tertiary strike-slip (Taylor 1910). This revolutionary idea fittingly found a place in Alfred Wegener’s theory of continental drift and thereafter in plate-tectonic theory with Greenland drifting hundreds of kilometres from North America along what Tuzo Wilson subsequently dubbed the ‘Wegener Fault’ (Wilson 1963). Today, the concept lives on. In modern palaeogeography, Nares Strait is given a long multiphase dynamic history with collision of Greenland and Canada in the Palaeogene (Fig. 1). A freely drifting Greenland plate unconstrained by ties to North America is now part of conventional wisdom as related in textbooks, review articles and educational material available on the internet. Accordingly, the Wegener Fault is a standard feature in international compilations of world geology (e.g. UNESCO 2010; Fig. 2). Unfortunately, this 100-year acclamation from Taylor (1910) to UNESCO (2010) is fundamentally flawed: the rocks and their relationships at Nares Strait flatly contradict the existence of the structure

    The Wolf (Canis lupus) in Greenland: A Historical Review and Present Status

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    In the past few decades, little information on the wolf (Canis lupus) in Greenland has been published. The decline of the species and its extirpation in the late 1930s from East Greenland is well documented. Since then, there has been a tendency for wolves sighted in the North and East Greenland National Park to be classified as temporary visitors wandering afar from adjacent Canada, with no prospect of survival in Greenland for anything but a short period. In view of the virtual absence of human population in this vast region, that assumption may not be accurate. There is now abundant evidence to indicate that a renewed immigration and dispersal of wolves has been taking place during the last years, with a migration route from Ellesmere Island eastward across North Greenland into Peary Land, and then southward into the fjord region of central East Greenland. The wolf is reoccupying its former range and by the winter of 1983 wolves had reached the Scoresby Sund region - the species' southernmost territory of the 1930s. Examination of the published records and all available unpublished data provides a historical picture of the status of the wolf in Greenland, from which some conclusions can be made regarding populations, pack size, migration routes, feeding habits and travelling distances.Key words: wolf, Canis lupus, Greenland, history, distribution, migration, re-establishment, High ArcticMots clés: loup, Canis lupus, Groenland, histoire, distribution, migration, ré-établissement, nord de l'Arctiqu
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