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  • Articles  (52)
  • Latest Papers from Table of Contents or Articles in Press  (41)
  • Articles: DFG German National Licenses  (11)
  • American Geophysical Union  (30)
  • Blackwell Publishing Ltd  (11)
  • Oxford University Press  (7)
  • Arctic Institute of North America  (4)
  • 1990-1994  (20)
  • 1985-1989  (32)
  • 1980-1984
  • 1975-1979
  • 1950-1954
  • 1991  (20)
  • 1985  (32)
  • Geosciences  (39)
  • Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition  (7)
  • Geography  (6)
  • Process Engineering, Biotechnology, Nutrition Technology  (5)
  • Mathematics  (4)
Collection
  • Articles  (52)
Source
  • Latest Papers from Table of Contents or Articles in Press  (41)
  • Articles: DFG German National Licenses  (11)
Publisher
Years
  • 1990-1994  (20)
  • 1985-1989  (32)
  • 1980-1984
  • 1975-1979
  • 1950-1954
Year
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  • 1
    Electronic Resource
    Electronic Resource
    Impact of the Proposed Qattara Reservoir on the Moghra Aquifer of Northwestern Egypt (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 29 (1991), S. 0 
    Details
    ISSN: 1745-6584
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: This paper examines hydrogeologie effects of proposed diversion of water from the Mediterranean Sea to the Qattara Depression for generation of electricity in northwestern Egypt. The Lower Miocene Moghra aquifer directly underlies the Qattara Depression, extending to the east and dipping beneath younger formations to the north. The Qattara Depression is a sink for ground-water flow from the Nile Delta aquifer in the east, the Mediterranean Sea in the north, and the Nubian artesian aquifer in the south. In this study, a two-dimensional finite-difference model was used in conjunction with available meteorologie, geologic, and hydrologie data to characterize the present ground-water conditions in this aquifer and to make predictions about the water-table rise which could occur as a result of the proposed Qattara Reservoir. Model predictions indicate that creation of the reservoir could cause a 30-meter rise of the Moghra aquifer's water table in the central part of the Qattara Depression. This water-table rise decreases to the north and east. Transient simulations indicate that steady-state conditions in the modeled area of the Moghra aquifer are not likely to be reached during the expected 100-year lifetime of the reservoir.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-6584.1991.tb00515.x
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  • 2
    Electronic Resource
    Electronic Resource
    The dipping antiplane crack (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 106 (1991), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: We derive the elastostatic field arising from the introduction of a 2-D dipping antiplane crack at the surface of an elastic half-space having a pre-existing uniform field. The problem is equivalent to that of two identical, joined, antiplane cracks in an infinite, uniformly strained medium; each crack is inclined by the same amount from the axis of symmetry, giving rise to a bent crack. For cracks with the same depth of crack tip beneath the surface, the amount of elastic energy released increases with the angle from the vertical. However, the rate of energy release with increasing angle is less than the rate of increase of surface energy. Plane, vertical cracks are favoured energetically in infinite, homogeneous media, while bent cracks are favoured in heterogeneous media where a crack must deviate from straight line growth in order to bypass a high-strength barrier. We compare the trade-offs in total energy of bent cracks with barrier energies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1991.tb06331.x
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  • 3
    Electronic Resource
    Electronic Resource
    Single-Link Cluster Analysis, Synthetic Earthquake Catalogues, and Aftershock Identification (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 104 (1991), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: This paper investigates several aspects of synthetic catalogue generation and aftershock identification schemes. First, we introduce a method for generating synthetic catalogues of earthquakes. This method produces a catalogue which has the geographic appearance of an actual catalogue when the hypocentres are plotted in map view, but allows us to vary the spatial and temporal relationships between pairs of close events. Second, we discuss six statistics to measure certain characteristics of synthetic and actual catalogues. These include four new statistics So, Bo, S1 and B1 which evaluate the distributions of link lengths between events in space and space-time as computed by single-link cluster analysis (SLC). Third, we develop a new scheme for identifying aftershocks in which a group of events forms an aftershock sequence if each event is within a space-time distance D of at least one other event in the group. We define the space-time separation of events by dst=√(d2+C2τ2), where d is the spatial separation of events, τ is the time separation, and C= 1km day-1. Our experience with several synthetic catalogues suggests that an appropriate trial value for D is 9.4 km1/2 (√S1) - 25.2 km. Here, S1, is the median link length using SLC with the metric dsT. Fourth, we generate synthetic catalogues resembling both teleseismic and local network catalogues to evaluate the validity and reliability of this aftershock identification scheme, as well as other schemes proposed by Gardner & Knopoff (1974), Shlien & Toksöz (1974), Knopoff, Kagan & Knopoff (1982), and Reasenberg (1985). Using a simple scoring method, we find that the SLC method compares favourably with other aftershock identification algorithms described in the literature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1991.tb02512.x
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  • 4
    Electronic Resource
    Electronic Resource
    Effect of Subprimal Fabrication and Packaging Methods on Palatability and Retail Caselife of Loin Steaks from Lean Beef (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 50 (1985), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Eighty subprimals were fabricated from 20 pairs of beef strip loins from lean (fat thickness, 0.2-0.4 cm) US Standard and US Good carcasses. Three vacuum packaged (VP) and one dry aged treatments were randomly assigned to short loin sections of each carcass. Steaks from VP intact and VP not-reassembled subprimals were rated highest in overall appearance and eating quality. Dry aging reduced retail caselife, produced greater shrinkage and trim losses and lower overall satisfaction ratings by panelists. Precutting subprimals into steaks followed by VP aging tends to decrease retail caselife (especially if steaks are reassembled) and decrease juiciness and tenderness.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1985.tb10529.x
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  • 5
    Electronic Resource
    Electronic Resource
    Headspace Sulfur Dioxide and the Storage of Dried Apples (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 50 (1985), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A gas chromatographic technique was used to determine sulfur dioxide and carbon dioxide in the headspace of packaged apples during storage. The headspace sulfur dioxide so determined decreased more rapidly and correlated better with nonenzymatic browning of the apples than free or total sulfur dioxide. The decrease in headspace sulfur dioxide, which was not accompanied by a comparable decrease in free sulfur dioxide, was attributed to the binding of sulfite to organic components of the apple. Free sulfur dioxide was found to measure not just the inorganic sulfite, which is commonly assumed, but also bound sulfite which was rapidly released under the acid conditions. Neither free nor total sulfur dioxide in a product could be quantitatively determined from headspace gas chromatographic techniques.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1985.tb10556.x
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  • 6
    Electronic Resource
    Electronic Resource
    Isolation and Heat Stability of Trypsin Inhibitors in Amaranth (Amaranthus hypochondriacus) (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 50 (1985), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Trypsin inhibitors were isolated from seeds of Amaranthus hypochondriacus by extraction at pH 7.5, heat treatment at 70°C for 15 min and affinity chromatography with trypsin-Sepharose 4B. Inhibitors of trypsin and chymotrypsin were identified in polyacrylamide gels following electrophoresis using a stain procedure that employed the chromogenic substrate acetyl-D, L-phenylalanine-2-napthyl ester. Three of the thirteen trypsin inhibitors identified in the electrophoresis gels, also had antichymotryptic activity. The inhibitor preparation was very thermostable retaining 20% of its original activity after 7 hr at 100°C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1985.tb10523.x
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  • 7
    Electronic Resource
    Electronic Resource
    HYDROLOGIC ENGINEERING CENTER PLANNING MODELS (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 21 (1985), S. 0 
    Details
    ISSN: 1752-1688
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: : The U.S. Army Corps of Engineers has broad, nationwide water resources planning and management responsibilities. In response to the needs of Corps professionals, the Hydrologic Engineering Center (HEC) has developed and supports a family of computer programs designed to aid them in their work. These programs include catchment, channel, alluvial, and statistical process models, system operation models, plan evaluation models, and data management programs. These models individually and collectively have been used throughout the Corps in a wide range of water resources planning studies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1752-1688.1985.tb05359.x
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  • 8
    Electronic Resource
    Electronic Resource
    Calcium Supplementation and Processing Variable Effects on Orange Juice Quality (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 56 (1991), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Untreated, pectinesterase treated, low pulp, and pectinase treated orange juices were fortified to 20% RDA of calcium with calcium carbonate or calcium phosphate/lactate (75/25). Neither calcium supplement adversely affected flavor, cloud density, settling pulp, or viscosity in untreated, low pulp, or pectinase treated juices. PME exposed orange juice held 4 hr before pasteurization and calcium supplementation had less cloudy density, increased viscosity and more settling pulp. Calcium carbonate fortified PME exposed and pectinase treated juices had lower flavor scores, while calcium phosphate suspensions caused slightly lower color scores of all juices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1991.tb04775.x
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  • 9
    Electronic Resource
    Electronic Resource
    Viscosity Reduction and Reformation of Structure in Orange Concentrate as Affected by Homogenization within Commercial Taste Evaporators (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 56 (1991), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Experiments were undertaken to determine, if homogenization would reduce viscosity of bulk orange concentrate during commercial production and if a structure built-up during storage. Homogenizers, installed within two Taste evaporators at separate citrus processing plants, were cycled “on” for homogenized samples and “off” for controls. In four replicates, homogenization significantly reduced viscosity 19% average. Samples were stored 6 months under tank farm conditions. Structure increased in 5 of 8 samples, but homogenized samples remained significantly lower in viscosity. This confirmed earlier pilot plant results under commercial operations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1991.tb04773.x
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  • 10
    Electronic Resource
    Electronic Resource
    THE PRACTICE OF COMBINED SEWER SYSTEM MODELING (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 27 (1991), S. 0 
    Details
    ISSN: 1752-1688
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: : A combined sewer system is a complex system subject to the dynamic stimuli of precipitation, runoff pollution loads, and sanitary wastes. The system response is a random series of pollutant loads to a receiving water. In many localities, these discharges create considerable water quality problems. Mathematical models can and have played a useful role in predicting the behavior of combined sewer systems and evaluating abatement strategies.Based on the authors' experiences over the past several years, this paper explores some of the positive and negative aspects of using deterministic mathematical models to simulate the behavior of combined sewer systems. A case study follows a discussion on modeling objectives, limitations of modeling, model selection, establishing model credibility, and many other considerations necessary in modeling and simulating these systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1752-1688.1991.tb03123.x
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