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  • Blackwell Publishing Ltd  (65)
  • 2005-2009
  • 1990-1994  (65)
  • 1945-1949
  • 1993  (37)
  • 1992  (28)
  • 1
    Electronic Resource
    Electronic Resource
    Fluid infiltration during contact metamorphism of interbedded marble and calc-silicate hornfels, Twin Lakes area, central Sierra Nevada, California (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of metamorphic geology 11 (1993), S. 0 
    Details
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Abstract In the Twin Lakes area, central Sierra Nevada, California, most contact metamorphosed marbles contain calcite + dolomite + forsterite ± diopside ± phlogopite ± tremolite, and most calc-silicate hornfelses contain calcite + diopside + wollastonite + quartz ± anorthite ± K-feldspar ± grossular ± titanite. Mineral-fluid equilibria involving calcite + dolomite + tremolite + diopside + forsterite in two marble samples and wollastonite + anorthite + quartz + grossular in three hornfels samples record P± 3 kbar and T± 630° C. Various isobaric univariant assemblages record CO2-H2O fluid compositions of χCO2= 0.61–0.74 in the marbles and χCO2= 0.11 in the hornfelses. Assuming a siliceous dolomitic limestone protolith consisting of dolomite + quartz ° Calcite ± K-feldspar ± muscovite ± rutile, all plausible prograde reaction pathways were deduced for marble and hornfels on isobaric T-XCO2 diagrams in the model system K2O-CaO-MgO-Al2O3-SiO2-H2O-CO2. Progress of the prograde reactions was estimated from measured modes and mass-balance calculations. Time-integrated fluxes of reactive fluid which infiltrated samples were computed for a temperature gradient of 150 °C/km along the fluid flow path, calculated fluid compositions, and estimated reaction progress using the mass-continuity equation. Marbles and hornfelses record values in the range 0.1–3.6 × 104 cm3/cm2 and 4.8–12.9 × 104 cm3/cm2, respectively. For an estimated duration of metamorphism of 105 years, average in situ metamorphic rock permeabilities, calculated from Darcy's Law, are 0.1–8 × 10−6 D in the marbles and 10–27 × 10−6 D in the hornfelses. Reactive metamorphic fluids flowed up-temperature, and were preferentially channellized in hornfelses relative to the marbles. These results appear to give a general characterization of hydrothermal activity during contact metamorphism of small pendants and screens (dimensions ± 1 km or less) associated with emplacement of the Sierra Nevada batholith.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1525-1314.1993.tb00132.x
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  • 2
    Electronic Resource
    Electronic Resource
    Porphyroblast inclusion-trail orientation data: eppure non son girate! (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of metamorphic geology 10 (1992), S. 0 
    Details
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Extensive examination of large numbers of spatially orientated thin sections of orientated samples from orogens of all ages around the world has demonstrated that porphyroblasts do not rotate relative to geographical coordinates during highly non-coaxial ductile deformation of the matrix subsequent to their growth. This has been demonstrated for all tectonic environments so far investigated. The work also has provided new insights and data on metamorphic, structural and tectonic processes including: (1) the intimate control of deformation partitioning on metamorphic reactions; (2) solutions to the lack of correlation between lineations that indicate the direction of movement within thrusts and shear zones, and relative plate motion; and (3) a possible technique for determining the direction of relative plate motion that caused orogenesis in ancient orogens.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1525-1314.1992.tb00084.x
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  • 3
    Electronic Resource
    Electronic Resource
    Atrazine in a Stream-Aquifer System: Estimation of Aquifer Properties from Atrazine Concentration Profiles (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Ground water monitoring & remediation 13 (1993), S. 0 
    Details
    ISSN: 1745-6592
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: Lincolns municipal wellfield consists of 44 wells developed in an alluvial aquifer adjacent to the Platte River near Ashland, Nebraska Induced recharge from the river is the primary source of water for the wellfield. Wafer samples were collected on a periodic basis from the Platte River arid two transects of monitoring wells. These samples were analyzed for the herbicide atrazine, which was used as a tracer of induced recharge in this stream-aquifer system. Atrazine concentrations in the river and aquifer were much less than 1.0 ppb during late fall and winter, but increased to as high as 18.9 ppb during spring and summer, associated with runoff from upgradient agricultural lands. There was approximately a 21-day lag time from the first detection of increasing atrazine concentration in the river to the first detection in monitoring wells immediately adjacent to the river. This lag time was relatively constant throughout the year and from one year to the next, even with major fluctuations of river stage and wellfield production. This consistency of lag time indicated that the travel times from the river to the first set of monitoring wells immediately adjacent to the river were fairly constant.Paths of preferential flow were identified in the aquifer at a depth of 25 to 35 feet below land surface. This aquifer zone appeared to play a significant role in movement of water from beneath the river into the wellfield.Aquifer dispersivity was calculated using a method described by Hoehn and Santschi (1987). Macrodispersivity (AL) was shown to increase linearly over the scale of the wellfield. Calculated values of AL were within limits of other reported values for this type of aquifer material and agreed well with values reported by Hoehn and Santschi (1987); These findings will be extremely beneficial for planning and management of the municipal wellfield.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-6592.1993.tb00445.x
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  • 4
    Electronic Resource
    Electronic Resource
    C5 DEFICIENCY IN A/J MICE IS NOT ASSOCIATED WITH RESISTANCE TO THE DEVELOPMENT OF SECONDARY AMYLOIDOSIS (1992)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 19 (1992), S. 0 
    Details
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: The aim of the study was to determine whether C5 deficiency in the mouse is associated with resistance to the development of secondary amyloidosis. Chronic inflammation was induced in the F2 progeny, derived from matings between amyloid-susceptible and amyloid-resistance mice, by daily injections of azocasein for thirty days. Using a restriction fragment length polymorphism generated by digestion of genomic DNA with the restriction enzyme HindIII, C5 sufficient and deficient DNA can be clearly differentiated. Eight mice were found to be C5 sufficient, 32 were heterozygotes and 14 were found to be C5 deficient. Grading of the splenic amyloid load from negative to 4+ was performed after staining tissue squashes with Congo red and viewing them under a polarizing microscope. Seventeen mice were noted to have negative to trace, 18 had moderate (1+-2+) and 19 had heavy (3 H+-4+) amyloid deposition. There was no correlation between splenic amyloid load and C5 deficiency. Based on these results it is clear that C5 deficiency and resistance to secondary amyloidosis are not associated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1744-313X.1992.tb00085.x
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  • 5
    Electronic Resource
    Electronic Resource
    Measuring the Performance of Banks (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Business strategy review 4 (1993), S. 0 
    Details
    ISSN: 1467-8616
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: Banks do not publish accounts in quite the same way as other companies, and nor should they. But they should not be immune to conventional standards of performance ranking and evaluation. This companion piece to Business Strategy Review articles on measuring company performance applies some performance benchmarking to a sample of European Banks. The result: they must do better.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-8616.1993.tb00056.x
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  • 6
    Electronic Resource
    Electronic Resource
    The World's Best Performing Companies (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Business strategy review 4 (1993), S. 0 
    Details
    ISSN: 1467-8616
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: For companies to create successful strategies, they need to identify success. Performance measurement and benchmarking are an important step towards good performance itself. But conventional profit measures do not provide a good benchmark. Using a profitability indicator which measures value created for shareholders, Business Strategy Review ranks the best performing companies in Europe, America and Japan. The message: if you want to be a successful company, move into the Pharmaceuticals sector.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-8616.1993.tb00048.x
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  • 7
    Electronic Resource
    Electronic Resource
    British Industry in the 1980's (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Business strategy review 3 (1992), S. 0 
    Details
    ISSN: 1467-8616
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: British industry has had a turbulent decade, and it is hard to assess how far it has come over the 1980's. The BBC's Money Programme wanted to enlighten public debate on the subject, and commissioned London Business School researchers to furnish them with as much data as possible. This article catalogues the data and summarises many arguments of interpretation around it.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-8616.1992.tb00022.x
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  • 8
    Electronic Resource
    Electronic Resource
    RESPONSE TO “PROLEGOMENA TO ANY FUTURE QUALITATIVE PHYSICS,” BY ELISHA SACKS AND JON DOYLE (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Computational intelligence 8 (1992), S. 0 
    Details
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-8640.1992.tb00366.x
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  • 9
    Electronic Resource
    Electronic Resource
    Maximum Likelihood Estimation: for the Multinomial Distribution (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Teaching statistics 14 (1992), S. 0 
    Details
    ISSN: 1467-9639
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mathematics
    Notes: In a first course in mathematical statistics or categorical data analysis, the maximum likelihood estimators of the parameters of the multinomial distribution are often “derived” using calculus. However, the important step of verifying that the resulting estimators indeed maximize the likelihood is omitted or done incorrectly. In this paper, two simple methods of obtaining the maximum likelihood estimates are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-9639.1992.tb00231.x
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  • 10
    Electronic Resource
    Electronic Resource
    THE FIXED CHARGE MAXIMAL COVERING LOCATION PROBLEM (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Papers in regional science 71 (1992), S. 0 
    Details
    ISSN: 1435-5957
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: The maximal covering location problem is based on locating p facilities in such a manner that coverage is maximized within set distance or time standards. This problem has been extended in a number of different ways where the main theme still involves locating a fixed number of facilities. In many applications site costs are not equal; this should cast doubt on the use of a constraint that fixes the number of facilities at a given number as compared to an approach that minimizes site costs and maximizes coverage. This paper addresses the use of site costs in a maximal covering location problem and presents several approaches to solutions, along with computational results. Theoretical linkages to other location models are also presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1435-5597.1992.tb01843.x
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