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  • Life and Medical Sciences  (3,916)
  • Animals  (2,869)
  • Life Sciences (General)  (1,928)
  • Inorganic Chemistry  (1,777)
  • Geophysics  (1,233)
  • 1995-1999  (11,723)
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Year
  • 1
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    Developments in Petrophysics (1997)
    London : The Geological Society
    Details
    Keywords: Petrophysik ; Geophysics ; Petroleum - Geology ; Petroleum engineering ; Rocks
    Description / Table of Contents: P. D. Jackson, D. G. Gunn, R. C. Flint, D. Beamish, P. I. Meldrum, M. A. Lovell, P. K. Harvey, and A. Peyton: A non-contacting resistivity imaging method for characterizing whole round core while in its liner / Geological Society, London, Special Publications, 122:1-10, doi:10.1144/GSL.SP.1997.122.01.01 --- D. J. Prosser, A. Hurst, and M. R. Wilson: One-man-operable probe permeameters / Geological Society, London, Special Publications, 122:11-18, doi:10.1144/GSL.SP.1997.122.01.02 --- S. R. McDougall, A. B. Dixit, and K. S. Sorbie: Network analogues of wettability at the pore scale / Geological Society, London, Special Publications, 122:19-35, doi:10.1144/GSL.SP.1997.122.01.03 --- S. Pugliese and N. Petford: Pore-structure visualization in microdioritic enclaves / Geological Society, London, Special Publications, 122:37-46, doi:10.1144/GSL.SP.1997.122.01.04 --- Paul B. Basan, Ben D. Lowden, Peter R. Whattler, and John J. Attard: Pore-size data in petrophysics: a perspective on the measurement of pore geometry / Geological Society, London, Special Publications, 122:47-67, doi:10.1144/GSL.SP.1997.122.01.05 --- M. S. King, A. Shakeel, and N. A. Chaudhry: Acoustic wave propagation and permeability in sandstones with systems of aligned cracks / Geological Society, London, Special Publications, 122:69-85, doi:10.1144/GSL.SP.1997.122.01.06 --- Shiyu Xu, Just Doorenbos, Sue Raikes, and Roy White: A simple but powerful model for simulating elastic wave velocities in clastic Silicate rocks / Geological Society, London, Special Publications, 122:87-105, doi:10.1144/GSL.SP.1997.122.01.07 --- T. Apuani, M. S. King, C. Butenuth, and M. H. De Freitas: Measurements of the relationship between Sonic wave velocities and tensile strength in Anisotropic rock / Geological Society, London, Special Publications, 122:107-119, doi:10.1144/GSL.SP.1997.122.01.08 --- C. McCann, J. Sothcott, and S. B. Assefa: Prediction of petrophysical properties from seismic quality factor measurements / Geological Society, London, Special Publications, 122:121-130, doi:10.1144/GSL.SP.1997.122.01.09 --- Y. F. Sun and D. Goldberg: Estimation of aspect-ratio changes with pressure from seismic velocities / Geological Society, London, Special Publications, 122:131-139, doi:10.1144/GSL.SP.1997.122.01.10 --- P. K. Harvey, M. A. Lovell, J. C. Lofts, P. A. Pezard, and J. F. Bristow: Petrophysical estimation from downhole Mineralogy logs / Geological Society, London, Special Publications, 122:141-157, doi:10.1144/GSL.SP.1997.122.01.11 --- Paul F. Worthington: Petrophysical estimation of permeability as a function of scale / Geological Society, London, Special Publications, 122:159-168, doi:10.1144/GSL.SP.1997.122.01.12 --- C. A. Gonçalves, P. K. Harvey, and M. A. Lovell: Prediction of petrophysical parameter logs using a multilayer backpropagation neural network / Geological Society, London, Special Publications, 122:169-180, doi:10.1144/GSL.SP.1997.122.01.13 --- Brian P. Moss: The partitioning of petrophysical data: a review / Geological Society, London, Special Publications, 122:181-252, doi:10.1144/GSL.SP.1997.122.01.14 --- A. Revil, P. A. Pezard, and M. Darot: Electrical conductivity, spontaneous potential and ionic diffusion in porous media / Geological Society, London, Special Publications, 122:253-275, doi:10.1144/GSL.SP.1997.122.01.15 --- Brígida Ramati P. Da Rocha and Tarek M. Habashy: Fractal Geometry, porosity and complex resistivity: from rough pore interfaces to hand specimens / Geological Society, London, Special Publications, 122:277-286, doi:10.1144/GSL.SP.1997.122.01.16 --- Brígida Ramati P. Da Rocha and Tarek M. Habashy: Fractal Geometry, porosity and complex resistivity: from hand specimen to field data / Geological Society, London, Special Publications, 122:287-297, doi:10.1144/GSL.SP.1997.122.01.17 --- M. Ben Clennell: Tortuosity: a guide through the maze / Geological Society, London, Special Publications, 122:299-344, doi:10.1144/GSL.SP.1997.122.01.18 --- J. C. Lofts, J. Bedford, H. Boulton, J. A. van Doorn, and P. Jeffreys: Feature recognition and the interpretation of images acquired from horizontal wellbores / Geological Society, London, Special Publications, 122:345-365, doi:10.1144/GSL.SP.1997.122.01.19 --- D. Goldberg and Y. F. Sun: Scattering attenuation as a function of depth in the Upper Oceanic Crust / Geological Society, London, Special Publications, 122:367-375, doi:10.1144/GSL.SP.1997.122.01.20 --- N. Passas, C. Butenuth, and M. H. De Freitas: An application of the Moiré Method to a study of local strains during rock failure in tension / Geological Society, London, Special Publications, 122:377-388, doi:10.1144/GSL.SP.1997.122.01.21
    Pages: Online-Ressource (VII, 393 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 1897799810
    URL: http://sp.lyellcollection.org/content/122/1
    Language: English
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  • 2
    Electronic Resource
    Electronic Resource
    The importance of radioactivity in geoscience and mining (1995)
    Springer
    Cellular and molecular life sciences 51 (1995), S. 703-709 
    Details
    ISSN: 1420-9071
    Keywords: Geophysics ; geology ; natural radioactivity ; radiometry ; mining ; uranium ores ; radon ; disposal of radioactive waste
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Almost simultaneously with Roentgen rays, natural radioactivity was discovered. Its investigation led to important fundamentals of the geosciences: petrophysics, terrestrial heat flow, isotope geology, and absolute geological chronology. In applied geophysics and geology, exploration of radioactive ores and of tectonic faults, and radiometric well loggings, are used. Production of radioactive water and mining for uranium ores are discussed, including their development (especially in the Saxon ore mountains) and the consequences on health (radon in underground air and houses). Disposal of radioactive waste is touched on briefly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01941267
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  • 3
    Electronic Resource
    Electronic Resource
    Phylogenetic position of Dictyostelium inferred from multiple protein data sets (1995)
    Springer
    Journal of molecular evolution 41 (1995), S. 238-246 
    Details
    ISSN: 1432-1432
    Keywords: Cellular slime molds ; Animals ; Fungi ; Plantae ; Maximum-likelihood method ; Evolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The phylogenetic position of Dictyostelium inferred from 18S rRNA data contradicts that from protein data. Protein trees always show the close affinity of Dictyostelium with animals, fungi, and plants, whereas in 18S rRNA trees the branching of Dictyostelium is placed at a position before the massive radiation of protist groups including the divergence of the three kingdoms. To settle this controversial issue and to determine the correct position of Dictyostelium, we inferred the phylogenetic relationship among Dictyostelium and the three kingdoms Animalia, Fungi, and Plantae by a maximum-likelihood method using 19 different protein data sets. It was shown at the significance level of 1 SE that the branching of Dictyostelium antedates the divergence of Animalia and Fungi, and Plantae is an outgroup of the Animalia-Fungi-Dictyostelium clade.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00170678
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  • 4
    Electronic Resource
    Electronic Resource
    Evolutionary relationships of eukaryotic kingdoms (1996)
    Springer
    Journal of molecular evolution 42 (1996), S. 183-193 
    Details
    ISSN: 1432-1432
    Keywords: Small-subunit ribosomal RNA ; Phylogeny ; Animals ; Fungi ; Plants ; Alveolates ; Heterokonts ; Stramenopiles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The evolutionary relationships of four eukaryotic kingdoms—Animalia, Plantae, Fungi, and Protista—remain unclear. In particular, statistical support for the closeness of animals to fungi rather than to plants is lacking, and a preferred branching order of these and other eukaryotic lineages is still controversial even though molecular sequences from diverse eukaryotic taxa have been analyzed. We report a statistical analysis of 214 sequences of nuclear small-subunit ribosomal RNA (srRNA) gene undertaken to clarify these evolutionary relationships. We have considered the variability of substitution rates and the nonindependence of nucleotide substitution across sites in the srRNA gene in testing alternative hypotheses regarding the branching patterns of eukaryote phylogeny. We find that the rates of evolution among sites in the srRNA sequences vary substantially and are approximately gamma distributed with size and shape parameter equal to 0.76. Our results suggest that (1) the animals and true fungi are indeed closer to each other than to any other “crown” group in the eukaryote tree, (2) red algae are the closest relatives of animals, true fungi, and green plants, and (3) the heterokonts and alveolates probably evolved prior to the divergence of red algae and animal-fungus-green-plant lineages. Furthermore, our analyses indicate that the branching order of the eukaryotic lineages that diverged prior to the evolution of alveolates may be generally difficult to resolve with the srRNA sequence data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02198844
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  • 5
    Electronic Resource
    Electronic Resource
    Segmentation and tracking of piglets in images (1995)
    Springer
    Machine vision and applications 8 (1995), S. 187-193 
    Details
    ISSN: 1432-1769
    Keywords: Tracking ; Segmentation ; Pigs ; Animals ; Computer vision
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract An algorithm was developed for the segmentation and tracking of piglets and tested on a 200-image sequence of 10 piglets moving on a straw background. The image-capture rate was 1 image/140 ms. The segmentation method was a combination of image differencing with respect to a median background and a Laplacian operator. The features tracked were blob edges in the segmented image. During tracking, the piglets were modelled as ellipses initialised on the blobs. Each piglet was tracked by searching for blob edges in an elliptical window about the piglet's position, which was predicted from its previous two positions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01215814
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  • 6
    Electronic Resource
    Electronic Resource
    The role of the Hermanus Magnetic Observatory in geomagnetic field research (1995)
    Springer
    Astrophysics and space science 230 (1995), S. 439-456 
    Details
    ISSN: 1572-946X
    Keywords: Geophysics ; geomagnetic field
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Geomagnetic field research carried out at the Hermanus Magnetic Observatory over the past decade is reviewed. An important aspect of this research has been the study of geomagnetic field variations, with particular emphasis on ULF geomagnetic pulsations. Features of geomagnetic pulsations which are unique to low latitude locations have been investigated, such as the cavity mode nature of low latitude Pi 2 pulsations and the role played by ionosphericO + ions in the field line resonances responsible for Pc 3 pulsations. A theoretical model has been developed which is able to account for the observed relationships between geomagnetic pulsations and oscillations in the frequency of HF radio waves traversing ionospheric paths. Other facets of the research have been geomagnetic field modelling, aimed at improving the accuracy and resolution of regional geomagnetic field models, and the development of improved geomagnetic activity indices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00658201
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  • 7
    Electronic Resource
    Electronic Resource
    An Approach to a Visual Language for Convective Fluid Flows: Visualization of Geophysical Simulations (1998)
    Springer
    Visual geosciences 3 (1998), S. 1-19 
    Details
    ISSN: 1610-2924
    Keywords: Geophysics ; Numerical modelling ; Visualization ; Language ; Convection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract It was known that deep within numbers and binary data from simulations of geophysical convective flows resided various patterns. Two models of convective fluid flows were being considered. One was a model of two-dimensional (768 × 256) air convection with finite Prandtl number of one and Rayleigh number of 108−1010, and another was a model of three-dimensional (up to 120 × 120 × 90) mantle convection with infinite Prandtl number and Rayleigh number of 106−108. Clearly, phenomena existed which superceded each individual dimensionless computer model to provide a piece of information regarding actual fluid flows. The problem was how to find, prove, and communicate these patterns and phenomena for convection simulations with gigabytes of data. In a search for such an analytical and communicative tool, the alternative of visualization was considered. The need for visualization was recognized and discussed. Then, utilizing both two- and three-dimensional models of high Rayleigh number convection, basic techniques of style and content were developed. Applications of the visualization techniques were designed utilizing IBM’s Data Explorer in order to create communicative images and movies, and after the applications, the problems of data storage and transfer became apparent. Throughout the process though, it became clear how important the language of vision actually could be in the geophysics community. In a field in which words such as plumes and internal waves have in ways replaced mathematics as the basic language for science, there is a need for another resource, another language-the visualization of convective fluid flows.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s10069-998-0001-3
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  • 8
    Electronic Resource
    Electronic Resource
    Animal Consciousness and Ethics in Asia and the Pacific (1997)
    Springer
    Journal of agricultural and environmental ethics 10 (1997), S. 249-267 
    Details
    ISSN: 1573-322X
    Keywords: Animals ; Asia ; consciousness ; Australia ; Hong Kong ; India ; Israel ; Japan ; New Zealand ; The Philippines ; Russia ; Singapore ; Thailand
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Philosophy
    Notes: Abstract The interactions between humans, animals and the environment have shaped human values and ethics, not only the genes that we are made of. The animal rights movement challenges human beings to reconsider interactions between humans and other animals, and maybe connected to the environmental movement that begs us to recognize the fact that there are symbiotic relationships between humans and all other organisms. The first part of this paper looks at types of bioethics, the implications of autonomy and the value of being alive. Then the level of consciousness of these relationships are explored in survey results from Asia and the Pacific, especially in the 1993 International Bioethics Survey conducted in Australia, Hong Kong, India, Israel, Japan, New Zealand, The Philippines, Russia, Singapore and Thailand. Very few mentioned animal consciousness in the survey, but there were more biocentric comments in Australia and Japan; and more comments with the idea of harmony including humans in Thailand. Comparisons between questions and surveys will also be made, in an attempt to describe what people imagine animal consciousness to be, and whether this relates to human ethics of the relationships.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007774409131
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  • 9
    Electronic Resource
    Electronic Resource
    Masthead (1995)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 128 (1995) 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19951280101
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  • 10
    Electronic Resource
    Electronic Resource
    Tripodal Triamidostannates as Building Blocks in the Generation of Sn - M-Bonded Heterobimetallics (M = Fe, Ru) (1995)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 128 (1995), S. 29-34 
    Details
    ISSN: 0009-2940
    Keywords: Tripodal ligands ; Triamidostannates ; Metal-metal bonds ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: By in situ lithiation of the trifunctional amines H3CC(CH2NHSiMe3)3, PhC(CH2NHSiMe3)3, and HC{SiMe2NH(p-Tolyl)}3 and subsequent reaction with SnCl2 the corresponding triamidostannates were obtained. These were coupled with CpM(CO)2Cl (M = Fe, Ru) to yield the M - Sn-bonded heterobimetallics 9-14 of which H3CC(CH2NSiMe3)3SnFe(CO)2Cp (9) was characterized by a single-crystal X-ray structure analysis. Of the in situ-generated amidostannates only [HC{SiMe2N(p-Tolyl)}3Sn][Li(THF)3] (8) could be isolated as a uniform product and characterized analytically and spectroscopically.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19951280105
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