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  • 1
    ISSN: 1432-0495
    Keywords: Key words Geomorphology ; Soil chemistry ; Hydrochemical modelling ; Lignite mines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  Acidification is the most common water quality problem in lakes created from previous open cast lignite mines. Aeration of aquifers and dump materials from mining activities causes pyrite oxidation. Pyrite oxidation products are stored in pore water, minerals and at the exchange complexes of the aquifers and dump sediments. Rainfall runoff transports sediments on the dump slope into the lakes. Elutriation of these sediments whithin the lakes releases either acid-producing or acid-neutralizing agents. At a test site south of Leipzig, the annual erosion rates were quantified by water erosion models (RUSLE, EROSION 2D, PEPP) and field measurements. They ranged from 300 up to 900 tons per hectare. Hydrogen ion equivalent release or binding at the sediment elutriation was computed from laboratory analysis of the pore-water quality, ion exchange complex and mineral composition of the sediment. Two of the three investigated sediments contained 3 mmol (eq) acidity per 100 g dry sediment and revealed saturation with respect to jarosite, jurbanite and gypsum. In the third sediment, 6 mmol (eq) alkalinity per 100 g dry sediment was obtained. The annual net acidity influx was calculated to be about 0.5 million mol (eq) for the lake of the test site.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Bradford : Emerald
    Business process management journal 7 (2001), S. 33-50 
    ISSN: 1355-2503
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Economics
    Notes: This article presents the design and application of a Modified Sociotechnical Systems (MoSTS) methodology for holistic analysis of complex technical processes. Successes and failures of process redesign initiatives have demonstrated the strong influence of human elements on outcomes. (Sociotechnical Systems) STS provides a foundation for structured analysis and redesign of complex processes which emphasizes human aspects in process redesign. The MoSTS methodology is developed from STS research and practice and applied to analyze a complex technical process in the research and development sector. MoSTS is shown to be an effective methodology to facilitate analysis for process redesign, particularly where human influences may have a significant impact on success. The article concludes with limitations and implications for process analysis based on the MoSTS methodology application.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 87 (1960), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Monetary Economics 5 (1979), S. 97-104 
    ISSN: 0304-3932
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Economics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Brain and Cognition 14 (1990), S. 113-125 
    ISSN: 0278-2626
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine , Psychology
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Fatigue & fracture of engineering materials & structures 19 (1996), S. 0 
    ISSN: 1460-2695
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract— A series of low cycle fatigue experiments have been conducted on a 42CrMo steel under tension-torsion loading. Thin-walled tube specimens were used. Low cycle fatigue under various loading paths, including circular and square paths, have been investigated.The plastic work criterion for low cycle fatigue failure has previously been generally accepted, but it is difficult to calculate stress and strain for complex loading paths, especially for non-proportional loading. This present study suggests a simple method for the calculation of the stable cyclic stress and strain values based on a Modified Endochronic Constitutive Theory (MECT) that redefines an intrinsic time scale. The loading path effect under non-proportional loading is also considered when evaluating fatigue life.The results show that the plastic work approach using the MECT method in multiaxial fatigue calculations correlates reasonably well the data and is a reflection of loading path dependence.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 163 (1949), S. 219-220 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] DURING both research and routine complement fixation tests with foot-and-mouth disease virus, we attempted to develop a similar test for the condition known as contagious ecthyma of the lips, infectious or contagious pustular dermatitis or stomatitis and infectious labial dermatitis. The ...
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1433-0407
    Keywords: Schlüsselwörter X-chromosomale bulbospinale Neuronopathie ; Kennedy-Syndrom ; Triplet-repeat-Erkrankung ; Androgenrezeptor ; Motoneuronerkrankung ; Key words X-chromosomal recessive bulbospinal neuronopathy ; Kennedy syndrome ; Triplet repeat disease ; Androgen receptor ; Motoneuron disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary X-chromosomal recessive bulbospinal neuronopathy (X-BNS, Kennedy's disease) is an important differential diagnosis of amyotrophic lateral sclerosis. We present the data of ten own patients along with a review of the literature on this uncommon disease which is caused by an expanded CAG-repeat in the androgen receptor gene. This mutation probably affects the transcription regulating activity of the androgen receptor in neurons. Signs and symptoms of X-BSN can be derived from partial insensitivity for androgens and a mixed, mainly motor neuronopathy. The clinical diagnosis is based on: 1. lower motor neuron weakness of bulbar and proximal limb muscles with onset in the third to fifth decade, 2. cramps and pronounced fasciculations, particularly of facial muscles, 3. postural tremor, 4. diminished or absent sensory action potentials inspite of only minor sensory impairment, 5. gynecomastia, and 6. infertility, diabetes mellitus and hyperlipoproteinemia in a minority of cases. Unlike amyotrophic lateral sclerosis, disease progression is slow with barely shortened life expectancy, which should be stressed in patient counselling. Causal treatment is as yet unavailable but several aspects of palliative medicine should be considered.
    Notes: Zusammenfassung Im vorliegenden Artikel wird die X-chromosomal rezessive bulbospinale Neuronopathie (X-BSN, Kennedy-Syndrom) anhand der Beschreibung 10 eigener Patienten und einer Übersicht über die bisherige Literatur vorgestellt. Die Symptome leiten sich von einer motorischen und sensiblen Neuronopathie und einer partiellen Androgeninsensitivität ab. Wegweisend für die Diagnose sind daher: 1. atrophische Paresen, meist ab der 3. bis 5. Dekade, bulbär und proximal betont an den Extremitäten, 2. Muskelkrämpfe und ausgeprägte Faszikulationen, v. a. im Gesicht, 3. Haltetremor der Hände, 4. deutliche Amplitudenreduktion der sensiblen Nervenaktionspotentiale bei nur diskreten klinischen sensiblen Defiziten, 5. Gynäkomastie, 6. gelegentlich Infertilität, Diabetes mellitus und Lipidstoffwechselstörungen. Im Gegensatz zur amyotrophen Lateralsklerose, der wichtigsten Differentialdiagnose, ist die Lebenserwartung aufgrund sehr langsamer Progredienz kaum eingeschränkt. Die Erkrankung beruht auf einer Expansion des CAG-Repeats im Androgenrezeptorgen. Pathogenetisch wird u. a. eine gestörte Funktion des Androgenrezeptors als Transkriptionsfaktor in Nervenzellen diskutiert. Es existieren noch keine kausaltherapeutische Ansätze, jedoch sind zahlreiche palliativmedizinischen Maßnahmen zu bedenken.
    Type of Medium: Electronic Resource
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  • 9
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    Leiden : Periodicals Archive Online (PAO)
    Arabica. 5 (1958) 1 
    ISSN: 0570-5398
    Topics: Linguistics and Literary Studies , Ethnic Sciences , History , Theology and Religious Studies
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Acta mechanica Sinica 12 (1996), S. 368-376 
    ISSN: 1614-3116
    Keywords: nonproportional loading ; multiaxial loading ; ratchetting ; two-surface model ; cyclic hardening
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A new superposed rule of Mroz's kinematic hardening rule and Ziegler's kinematic hardening rule based on two-surface model is proposed in the paper. Some experimental results on ratchetting of 2014-T6 aluminum alloy are predicted very well under multiaxial loading. In addition the conformability of the model is discussed for transient cyclic hardening under two kinds of nonproportional cyclic loading paths, i.e. square and rhombic path.
    Type of Medium: Electronic Resource
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