Untersuchungen zur Eliminierungsanalyse Teil 6: Zur Begriffsbildung in der Eliminierungsanalyse     

V. Vobach  A. Beer 《洁净——土壤、空气、水》1976,4(5):431-441

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The Natural Hazards Theme of the International Year of Planet Earth     

Tom Beer 《Natural Hazards》2007,42(3):469-480

The United Nations has declared 2008 to be the International Year of Planet Earth. It is being organised under the auspices of the International Union of Geological Sciences and UNESCO. Planning for the International Year of Planet Earth has consisted of establishing 10 major science themes including Hazards. The Hazards Theme is centred around the following key questions: (1) How have humans altered the geosphere, the biosphere and the landscape, thereby creating long-term changes detrimental to life and the environment and triggering certain hazards, while increasing societal vulnerability to geophysical (geological and hydrometeorological) hazards? (2) What technologies and methodologies are required to assess the vulnerability of people and places to hazards and how might these be used at a variety of spatial scales? (3) How do geophysical hazards compare relative to each other regarding current capabilities for monitoring, prediction and mitigation and what can be done in the short-term to improve these capabilities (4) What barriers exist to the utilisation of risk and vulnerability information by governments (and other entities) for risk and vulnerability reduction policies and planning (including mitigation) from each of the geophysical hazards? Following the 26 December 2004 Indian Ocean Tsunami and the UN World Conference on Disaster Reduction held in Kobe, Japan in January 2005, the International Council for Science (ICSU) decided to establish a major research programme and initiative on Natural and Human Induced Environmental Hazards and Disasters that will co-operate with the Hazards theme of the International Year and continue through to 2011.  相似文献   

A simple mass estimate for central black holes in cuspy galaxies     

Herwig Dejonghe  Anne Mathieu  Veronique De Bruyne  Sven De Rijcke 《Celestial Mechanics and Dynamical Astronomy》1998,72(3):219-233

We argue that the temperature of the stellar phase is likely a monotically decreasing function of radius in the central regions of elliptical galaxies with cusps. We show that it requires the presence of a central mass concentration. An estimate of its minimum mass based on few parameters is given. This lower bound is consistent with current mass values of the central objects in galaxies derived from detailed models. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

On the conception ‘Fair weather condition’ in atmospheric electricity     

Sven Israelsson 《Pure and Applied Geophysics》1978,116(1):149-158

Measurements of atmospheric electrical and meteorological parameters during different meteorological conditions indicate that the use of the conception Fair weather condition in atmospheric electricity is discussable. Fair weather contains a very broad stability range, from very unstable to strong stable stability of the atmosphere. For turbulent fluctuations of the electric parameters (the most local variations) the variations are determined by the micrometeorological processes for all stability conditions.These fluctuations represent frequencies greater than one period per four minutes. For lower frequencies (less local variations), however, the stability dependency increases. During stable conditions the electric field and vertical current density were nearly wholly influenced by the charges and their transfer in the nearest layer. During near-neutral and unstable conditions the electrical parameters were influenced by more separated sources. Measurements of how well Ohm's law was fulfilled also indicate the difficulties by using the conception fair weather. The measurements also indicate the importance of taking the convection current density into consideration in studies of the electric charge transfer in the atmosphere.In the more large scale of variations measurements of the electric field by radiosoundings show that 88% of the ionospheric potential is derived from the troposphere, where the meteorological processes are of fundamental character for the atmospheric electrical phenomena. The relatively great stability of the diurnal variation of the large scale or global electric field is also valid for the meteorological processes in this scale of variations.  相似文献   

Ergebnisse der Eliminierungsanalyse. Teil 3: Beitrag zur Bestimmung und Charakterisierung der “lipophilen Spurenstoffe”     

V. Vobach  A. Beer 《洁净——土壤、空气、水》1978,6(2):109-120

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Geothermal investigations in the Bohus granite area in southwestern Sweden     

Ove Landstrm  Sven ke Larson  Gustaf Lind  David Malmqvist 《Tectonophysics》1980,64(1-2)

Heat generation and heat flow were determined for the Bohus granite massif in western Sweden. This is the start of a major program concerning geothermal energy in Sweden. Neutron activation analyses, temperature measurements, thermal conductivity measurements have been carried out. As was expected the result, 76 mW m⁻², shows that even old Precambrian shields locally exhibit much higher values than normal.  相似文献   

The PT phase relations of a primary oceanite from the Reykjanes peninsula,Iceland     

Sven Maaløe  Sveinn P Jakobsson 《Lithos》1980,13(3):237-246

The field relationships and petrographic features of the oceanites of the Reykjanes peninsula suggest that they might have originated as primary magmas. The principal phase relationships of primary liquids formed by the partial melting of lherzolites are defined. The phase relations obtained for oceanite RE78 between 0 and 30 kbar at dry conditions suggest that the oceanite originated as a primary magma at 25 kbar and 1580°C, and erupted at a temperature near 1300°C.  相似文献   

Time fluctuations of small ion number density in the atmospheric surface layer     

Sven Israelsson 《Pure and Applied Geophysics》1977,115(3):561-574

The standard deviations and time-spectra of small ion number density have been measured at ground level under different atmospheric stability conditions. The auto-correlation correlograms and the time-spectra imply a scale of fluctuations corresponding to 1 to 4 min. No clear relationships between standard deviations of small ion number density and micro-meteorological parameters are observed. Thus the results are not a support for Monin-Obukhov similarity theory. For the highest frequencies the slopes of the spectra seem to follow the –5/3-law fairly well and the frequencies of the peak values of individual spectra lnfS(f) increase when the atmosphere stability increases, which is valid for ordinary micrometeorological parameters.  相似文献   

Ergebnisse der Eliminierungsanalyse. Teil 2: Ein Beitrag zur Theorie des organischen Stoffgemisches natürlicher Gewässer     

V. Vobach  N. Gottschaldt  A. Beer  R. Klaus 《洁净——土壤、空气、水》1977,5(4):337-349

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An alternative to common envelope evolution     

Martin E. Beer  Lynnette M. Dray  rew R. King  Graham A. Wynn 《Monthly notices of the Royal Astronomical Society》2007,375(3):1000-1008

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