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  • 1995-1999  (54)
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  • 1
    Electronic Resource
    Electronic Resource
    Structural Relaxation and Viscous Flow in Amorphous ZrAlCu Above and Below the Glass Transition Temperature (1996)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 225-227 (July 1996), p. 83-88 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/02/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.225-227.83.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Shellsort with a constant number of increments (1996)
    Springer
    Algorithmica 16 (1996), S. 649-654 
    Details
    ISSN: 1432-0541
    Keywords: Shellsort ; Sorting
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract We consider the worst-case running time of Shellsort when only a constant number,c, of increments are allowed. Forc=3, we show that Shellsort can be implemented to run inO(N 5/3) time, which is optimal. Forc=4, we further improve the running time toO(N 11/7), and, forc=5, we obtain a bound ofO(N 23/15). We also show anO(N 1+1/k ) bound for generalc, wherek=[(1+√8c+1)/4]. Forc=6, this isO(N 3/2).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01944355
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  • 3
    Electronic Resource
    Electronic Resource
    Messungen von mehreren Flüssigkeitspegeln in Tanks mit Mikrowellen (1998)
    Springer
    Electrical engineering 81 (1998), S. 351-356 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents In this paper different measurement-setups are discussed which are able to detect a second liquid level in a tank. Their advantages and disadvantages are shown. For a FSCW-Radar a novel multitarget evaluating algorithm, the reference-model, is derived. Measurements show that the distance can be determined exactly and that a high resolution can be obtained.
    Notes: Übersicht In der Arbeit werden verschiedene Meßverfahren für die Detektion einer Trennschicht vorgestellt und deren Vor- und Nachteile aufgezeigt. Ausgehend von einem FSCW-Radar wird ein neuartiges mehrzielfähiges Auswerteverfahren, das Referenzmodell, vorgestellt. Untersuchungen zeigen, daß eine robuste Entfernungsbestimmung gegenüber Störungen mit sehr hoher Ortsauflösung erfolgen kann.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002020050060
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  • 4
    Electronic Resource
    Electronic Resource
    Messungen von mehreren Flüssigkeitspegeln in Tanks mit Mikrowellen (1998)
    Springer
    Electrical engineering 81 (1998), S. 351-356 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents In this paper different measurement-setups are discussed which are able to detect a second liquid level in a tank. Their advantages and disadvantages are shown. For a FSCW-Radar a novel multitarget evaluating algorithm, the reference-model, is derived. Measurements show that the distance can be determined exactly and that a high resolution can be obtained.
    Notes: Übersicht In der Arbeit werden verschiedene Meßverfahren für die Detektion einer Trennschicht vorgestellt und deren Vor- und Nachteile aufgezeigt. Ausgehend von einem FSCW-Radar wird ein neuartiges mehrezielfähiges Auswerteverfahren, das Referenzmodell, vorgestellt. Untersuchungen zeigen, daß eine robuste Entfernungsbestimmung gegenüber Störungen mit sehr hoher Ortsauflösung erfolgen kann.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01261096
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  • 5
    Electronic Resource
    Electronic Resource
    A Challenging Case for Protein Crystal Structure Determination: the Mating Pheromone Er-1 from Euplotes raikovi (1996)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 52 (1996), S. 469-480 
    Details
    ISSN: 1399-0047
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Four different phasing methods have been applied to the determination of the crystal structure of the 40 amino-acid mating pheromone of the unicellular ciliated protozoan Euplotes raikovi. The difficulties, failures and successes in attempts to solve the structure by: (1) molecular replacement, (2) direct phasing using the `Shake and Bake' algorithm, (3) isomorphous replacement, and (4) multiple-wavelength anomalous disper- sion are described. The structure was first solved by molecular replacement, and then was the first successful structure determination by `Shake and Bake' without the direct involvement of its authors. A description of the current status of the high-resolution refinement of the structure is also given. The model is refined against 1 Å resolution data to an R factor of 12.9%, and includes H atoms and discretely disordered side chains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0907444995014235
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  • 6
    Electronic Resource
    Electronic Resource
    Kohlrausch exponent of amorphous Zr65Al7.5Cu27.5 determined by anelastic relaxation measurements (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 69 (1996), S. 3200-3202 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Anelastic relaxations of amorphous Zr65Al7.5Cu27.5 have been studied in the range of the glass transition and in the supercooled liquid. Applying a force step function, an anelastic aftereffect of the form exp(t/τ)β (Kohlrausch–Williams–Watts function) is expected with an exponent β〈1. From the measurement a value of β=0.67±0.03 is determined at Tg which confirms the empirical correlation between the fragility index m (36.4 for Zr65Al7.5Cu27.5) and β, established by Böhmer et al. This result is another indication for the metallic glass Zr65Al7.5Cu27.5 being a rather strong glass former. Furthermore, a strong increase in β just above Tg is found and is interpreted in the framework of a cluster model. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.117960
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  • 7
    Electronic Resource
    Electronic Resource
    CLASSIFICATION OF THE FATIGUE DOMAIN AND PREDICTION OF DAMAGE WITH CRACK EXTENSION PARAMETERS (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Fatigue & fracture of engineering materials & structures 18 (1995), S. 0 
    Details
    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: The whole fatigue domain has been divided into six Werent zones, each governed by a separate fatigue regime. Some of these regimes coincide with a known classification of fatigue, and others are new regimes, where new prediction methods have been introduced. The proposed predictions are to be considered as practical curve fitting relations for special cases, but those cases can also be fairly general and useful for design purposes. The proposed fatigue diagram can be used as a basis for a quantified explanation of several known fatigue phenomena.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1460-2695.1995.tb00138.x
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  • 8
    Electronic Resource
    Electronic Resource
    CRACK EXTENSION UNDER VARIABLE LOADING IN THE SHORT AND THE LONG CRACK REGIME, USING A GENERAL FATIGUE DIAGRAM (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Fatigue & fracture of engineering materials & structures 19 (1996), S. 0 
    Details
    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 new fatigue domain diagram, recently introduced by one of the authors, makes it possible to demonstrate the fatigue behavior of specimens under varying stress amplitude loading both qualitatively and quantitatively. The diagram is briefly reviewed and crack propagation and damage summation of steel specimens under two level and multi level tension-compression loading are simulated and discussed. Typical patterns of low-high and high-low sequence levels are explained, predicted and, with careful classification, shown to follow certain cumulative damage trends. Correlation with experimental results is shown and discussed. The main conclusion is that one can show repeatable trends in H-L and L-H two-step and multi-step loading sequences, only for cases where the local material properties are not drastically changed, and the failure pattern is similar (critical crack propagation or gross yielding) in all stages of the tests. Damage accumulation, expressed as additional crack length, is clearly shown on the general fatigue diagram.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1460-2695.1996.tb00963.x
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  • 9
    Electronic Resource
    Electronic Resource
    On the use of the merging R factor as a quality indicator for X-ray data (1997)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 30 (1997), S. 203-205 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: By comparison of the accuracy and the merging R factor (Rmerge) of artificially created X-ray data sets, it is demonstrated that Rmerge is a poor predictor for the precision of X-ray data. The more often a given reflection is observed, the more precise the average intensity is, whereas Rmerge has a tendency to be higher at higher data redundancy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889897003907
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  • 10
    Electronic Resource
    Electronic Resource
    Occupational Sitting and Low Hip Mineral Density (1998)
    Springer
    Calcified tissue international 62 (1998), S. 47-50 
    Details
    ISSN: 1432-0827
    Keywords: Key words: Bone mineral density — Deoxypyridinoline — Dual energy X-ray absorptiometry — Osteocalcin — Physical activity.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Abstract. In order to evaluate the contribution of habitual physical activity to bone remodeling, we determined bone mineral density (BMD) at the lumbar spine (L2–4) and the hip by dual energy X-ray absorptiometry in 55 clerks and 44 nurses. Our data indicate similar L2–4 BMD in both groups due to equal weight load of the upper part of the body on the spinal column in both study groups, but higher femur BMD in the nurse group (0.6–0.8 SD, at various hip measurement sites) than in the clerk group. The age-adjusted hip BMD was correlated with serum osteocalcin levels, and was related to the duration of standing at work, indicating a cause and effect relationship. We conclude that prolonged working in a sitting position may induce a low hip BMD, and thereby increase the risk for osteoporotic hip fracture.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002239900393
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