ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Articles  (17)
  • Articles: DFG German National Licenses  (17)
  • Open Access-Papers
  • Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics  (11)
  • Natural Sciences in General  (6)
  • 1
    Electronic Resource
    Electronic Resource
    An improved formulation of the oxygen-diffusion problem and its application to Zircaloy oxidation by steam (1997)
    Springer
    Oxidation of metals 47 (1997), S. 427-444 
    Details
    ISSN: 1573-4889
    Keywords: modeling ; numerical techniques ; finite-difference methods ; diffusion ; moving boundary problem ; steam oxidation ; Zircaloy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Numerical solutions of the oxygen-diffusion problem arising in the oxidation of metals at high temperatures are complicated by the change in density as the oxide is formed and the occurrence of moving boundaries separating the different phases. The former complication is resolved by a transformation of the dependent variable and the coordinate, which reduces the problem to a form identical to one without density change. The latter complication is dealt with by demonstrating an analogy with the Stefan problem in heat transfer with phase change in the enthalpy formulation, for which abundant numerical works exist. A finite-difference code is written to solve the resulting equations. It is successfully applied to simulate an oxidation experiment of Zircaloy by steam at 1600°C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02134785
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Fatigue crack growth rates under sequential mixed-mode I and II loading cycles (2000)
    Oxford, UK : Blackwell Science Ltd
    Fatigue & fracture of engineering materials & structures 23 (2000), 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: One common mode of failure that occurs in rolling bodies such as gears, bearings and rails is due to the fatigue process. Several research workers suggest that rolling contact fatigue cracks are subjected to mixed mode I and II loading cycles. It is believed that the correct modelling of loading cycles can help us to study the mechanics of crack growth because fatigue comprises a major safety consideration in the design process. Experiments have been performed under nonproportional mixed-mode I and II loading cycles with fixed degrees of overlap, so that coplanar cracks were produced. Three empirical crack propagation laws have been established which are related to both mode I and mode II effective stress intensity factor ranges.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1460-2695.2000.00342.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Two measurement techniques for determining effective stress intensity factors (2000)
    Oxford, UK : Blackwell Science Ltd
    Fatigue & fracture of engineering materials & structures 23 (2000), 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: Two methods were studied for determining crack closure and locking effects under combinations of mixed mode I and II loading, namely the strain gauge and the surface replica methods. They demonstrated that strain gauges are able to detect the mode I crack closure but not mode II crack locking. As an alternative, the surface replica method is suggested as a practical technique for measuring mode II crack locking effects. The effective mode II stress intensity factor range can be estimated by comparison of the actual measured sliding range between a pair of crack faces and the theoretical sliding range.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1460-2695.2000.00341.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Stomatal conductance correlates with photosynthetic capacity (1979)
    [s.l.] : Nature Publishing Group
    Nature 282 (1979), S. 424-426 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Figure 1 shows the effects of applications of 3-(3,4-dichloro-phenyl)l,l-dimethylurea (DCMU), an inhibitor of photo-synthetic electron transport, and abscisic acid (ABA), a hormone which decreases stomatal aperture, on assimilation rate and leaf conductance in cotton plants. When DCMU was applied, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/282424a0
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Chromosome Numbers of some Psocid Genera (Psocoptera) (1966)
    [s.l.] : Nature Publishing Group
    Nature 211 (1966), S. 214-215 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Specimens of twenty-one species, representing seventeen genera in twelve families of Psocoptera, were collected in Hong Kong throughout the year. Males were used in this investigation; female oogonial meiosis and embryonic mitotic figures were attempted, but without success. Table 1. DIPLOID ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/211214a0
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    MECHANISM OF SICKLING IN DEER ERYTHROCYTES (1974)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 241 (1974), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1974.tb21917.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    A graph-based expert system approach to geometric feature recognition (1995)
    Springer
    Journal of intelligent manufacturing 6 (1995), S. 155-162 
    Details
    ISSN: 1572-8145
    Keywords: Feature recognition ; adjacency graphs ; expert systems
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Geometric feature recognition is a crucial task in the development of concurrent engineering software. This paper presents a new methodology for geometric feature recognition which combines the advantages of face-edge adjacency graphs and expert systems. The methodology uses several new concepts such as enhanced winged edge data structure (EWEDS) and multi-attributed adjacency graphs (MAAG). The object model is presented as a set of facts. The rules for the recognition of each feature are derived from the corresponding feature-MAAG. This simplifies the process of writing the rules while enabling the inclusion of new features into the rule base as they are encountered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00171444
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Vegetation effects on the isotope composition of oxygen in atmospheric CO 2 (1993)
    [s.l.] : Nature Publishing Group
    Nature 363 (1993), S. 439-443 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] During terrestrial photosynthesis, heavier C18O16O molecules diffuse into leaves more slowly than do the lighter CI6O2. Fur-ther, within the chloroplasts, carbonic anhydrase catalyses the exchange of oxygen atoms between CO2 and the water there. The 18O/16O ratio of chloroplast water is enriched ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/363439a0
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Earth-Moon Mass Ratio from Mariner 9 Radio Tracking Data (1973)
    [s.l.] : Nature Publishing Group
    Nature 241 (1973), S. 111-112 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 The effect of Earth-Moon mass ratio on doppler residuals. The mass ratio was determined from range and doppler data obtained over a period of 15 weeks (June 5 to September 15, 1971). The data coverage is shown in Table 1. We also show the statistics from the best determination. The data ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/241111a0
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Marijuana metabolites measured by a radioimmune technique (1974)
    [s.l.] : Nature Publishing Group
    Nature 252 (1974), S. 581-582 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A standard antibody-binding curve was obtained as follows: 4.5 ng (5,000 c.p.m.) of 3H-D8-THC (specific activity 465 mCimMol?1more than 98 %pure,New England Nuclear Corp.) was incubated for 2 h at 4 C with increasing dilutions of anti-serum (0.3 ml). The latter were made up with phosphate-buffered ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/252581a0
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...