The Privatization of the Oceans by Rognvaldur Hannesson     

Henry Frew 《The Professional geographer》2007,59(1):156-156

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Ted Harrison 1930–2007     

Henry Rishbeth 《Astronomy& Geophysics》2007,48(3):3.37-3.37

Associate of the RAS, pioneer in ionospheric incoherent scatter theory and observation, practical manager and leader, not least of EISCAT.  相似文献   

Classification of Non-oriented Fractures Along Boreholes to Joint Sets and its Success Degree     

E. Henry  D. Marcotte  P. Kavanagh 《Rock Mechanics and Rock Engineering》2001,34(4):257-273

Summary   The feasibility and safety of a mining project or the choice among alternative mining methods could depend on the joint densities and orientations within the rock mass. The accurate determination of the orientation of all joints is technically difficult and often economically unrealistic. This study presents a new approach in classifying joints found in exploration boreholes as joint sets, whose statistical distribution is determined from a few hundred oriented joints in boreholes. Each non-oriented joint is classified as belonging to a set based on its “a posteriori” probability of membership in a Bayesian framework. The theoretical rate of success of the classification can be computed for each possible borehole orientation and plotted on a stereonet to determine the optimal orientation of new boreholes. The performance and limitations of this approach are investigated. An application example at the Mont Porphyre's large scale block-caving project at Gaspé Mines, Quebec, Canada, is studied.  相似文献   

Structure and evolution of the backstop in the eastern Nankai Trough area (Japan): Implications for the soon-to-come Tokai earthquake   总被引：1，自引：0，他引：1  

X Le Pichon  S. Wmant    H. Tokuyama  F. Thoué  P. Huchon  P. Henry 《Island Arc》1996,5(4):440-454

Abstract We present data showing that the intra-oceanic shortening now occurring south of the eastern Nankai Trough that has produced the Zenisu Ridge has also been responsible for the formation of a previous ridge now buried below the continental margin. This ridge, that we refer to as Paleo-Zenisu, is presently adjacent to the backstop and its location coincides with the outer limit of the seismogenic decollement. The subduction of the paleo-Zenisu ridge below the wedge has led to its complete reorganization and has given its identity to the Great Tokai earthquake rupture zone. The formation of paleo-Zenisu and its consequent subduction has induced the tilting of the backstop toward the northwest since ca 2 Ma. This model suggests that the backstop and possibly the wedge are dextrally sheared because they are extruded southwestward in relation to the collision of the Izu-Bonin Ridge with Japan. We use the finite motion from Zenisu to paleo-Zenisu to derive both the subduction vectors along the Nankai Trough and the shortening vectors within Zenisu-Izu. The amount of shortening absorbed within Zenisu-Izu increases toward the northeast. The corresponding subduction vectors of the Zenisu platelet below the wedge decrease accordingly to the northeast from 50 to less than 20 mm/year and the Zenisu body rotates clockwise with a pole near 36° North, 139° East. This might explain the apparent longer repetition time of great earthquakes in the Tokai area. On the other hand, the 25-35 mm/year obtained for the rate of shortening along the Zenisu thrust indicates a high seismic potential there.  相似文献   

Practical method for drawing a VGP path     

Maxime Le Goff  Bernard Henry  Lucien Daly 《Physics of the Earth and Planetary Interiors》1992,70(3-4):201-204

A statistical method is proposed for the smoothing of polar wander paths and for giving their confidence limits by the mean of successive ellipses. The method is fully parametrical and is based on the relations between the inertia matrix and the parameters of the Fisher distribution, from which a bivariate form is deduced. An elementary tensorial calculation gives the parameters of the confidence ellipse around a vectorial weighted mean, for any unimodal set of vectors. This model can also be used for other statistical tests, wherever the rotational symmetry hypothesis is not consistent (i.e. the fold test).  相似文献   

Modelling the relationship between magnetic fabric and strain in polymineralic rocks     

Bernard Henry 《Physics of the Earth and Planetary Interiors》1992,70(3-4):214-218

We present a model that is applicable to the relatively frequent case of rocks in which the magnetic fabric is dominated by uniaxial paramagnetic minerals, and in which the deformation (pure shear) corresponds to the March-Fernandez model. Borradaile et al.'s procedure for the isolation of the magnetic fabric of monocrystals of anisotropic components allows us to obtain the magnetic properties equivalent to those of all the component minerals if they should be artificially aligned. In the case of real component minerals with similar shape parameters, χ (dependent on dimension ratio), these properties will correspond to those of a theoretical equivalent mineral. Therefore, finite strain and orientation tensors may be determined from magnetic fabric measurements of such polymineralic rocks.  相似文献   

Relation Between Anisotropic Transmissivity and Azimuthal Resistivity Surveys in Shallow, Fractured, Carbonate Flow Systems   总被引：2，自引：0，他引：2  

Robert William Ritzi  Jr.  Robert Henry Andolsek 《Ground water》1992,30(5):774-780

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Questioning development — growth? destruction? sustainability?     

Ben Wisner  Henry R. Luce 《GeoJournal》1995,35(2):99-104

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Winners, losers and curate's eggs: Urban and regional outcomes of Australian economic restructuring 1971–1991     

Peter A. Murphy  Sophie Watson 《Geoforum》1995,26(4):337-349

Since the early 1970s the Australian economy has undergone major transformations common to other western industrialised countries. Jobs in manufacturing declined precipitately whilst the service economy grew, most significantly in producer services but also in lower skilled jobs. Tourism and services exports began to rival traditional agricultural and mining staples. Social outcomes, also typical of international trends, included rising unemployment and polarisation of incomes. Australia's changing global context, especially the nation's increasing orientation towards Asian growth economies, have underpinned restructuring. A political climate of economic rationalism has facilitated and accentuated restructuring. The economic shifts of the past quarter century have meant that everywhere the basis for economic growth has changed. Overlaying and reinforcing the re-definition of competitive advantage has been a shift in the pattern of agglomeration economies and diseconomies. New growth regions have emerged, others have had their prospects reinforced, and still others have had their outlook diminished in absolute or, more commonly, relative terms. The paper traces the regional outcomes of national economic restructuring and shifts in the balance of agglomeration economies and diseconomies over the period from 1971 to 1991. The focus is on the top end of the urban hierarchy, on specialised industrial cities where job loss from manufacturing has hit hard, amenity regions where international and domestic tourism have been major factors in growth, and non-metropolitan balances where growth has been uneven but generally low. Demographic, economic sectoral and welfare indicators are woven into a tableau of change expressed at national, intra-state and intrametropolitan scales.  相似文献   

Long-term change in precipitation in southern Italy     

Henry M. Papée  Liliana A. Masironi 《Pure and Applied Geophysics》1962,53(1):214-228

Summary Annual average precipitation values obtained at 765 Italian raingauge stations south of the Rome parallel and in the Italian Isles, are analyzed. The analysis is extended over 18 years and marked variations in precipitation with the Zürich annual relative sunspot numbers are found. It is found furthermore that the magnitude of change appears to depend also on the average altitude of the 5 categories of stations considered.

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Riassunto In questo articolo viene fatta un'analisi sulle variazioni delle precipitazioni medie annue in base ai dati forniti da 765 stazioni pluviometriche dell'Italia meridionale, Sicilia e Sardegna, negli anni dal 1926 al 1943 incluso. Tali variazioni sembrano essere legate al numero medio annuo di macchie solari e dipendono anche dall'altezza delle stazioni.

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Contribution of the Centro Nucleazione Aerosoli of the National Research Council of Italy; Via Vettore 4 (Monte Sacro)  相似文献