Library

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
  • 1
    Electronic Resource
    Electronic Resource
    Viscous fluid in static spherically symmetric space-time (1983)
    Springer
    International journal of theoretical physics 22 (1983), S. 363-368 
    Details
    ISSN: 1572-9575
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The paper presents a static spherically symmetric viscous fluid solution of Einstein field equation, assuming an equation of statep=(γ−1)ρ. Though static, the solution has expansion, shear, and acceleration and can explain cosmological red shift. Also it has a particle horizon. The singularity at the origin and larger viscosity make it unfit to represent a real universe.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02082902
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Vorticity- and shear-free space-time in general relativity (1984)
    Springer
    General relativity and gravitation 16 (1984), S. 297-303 
    Details
    ISSN: 1572-9532
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The paper studies the vorticity- and shear-free nonstatic space-times with perfect fluid source in genera] relativity and finds that such space-times are either spherically symmetric or pseudospherical or plane symmetric.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00762544
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Outcrossing and isolation requirement in jute (Corchorus olitorius L.) (1982)
    Springer
    Euphytica 31 (1982), S. 97-101 
    Details
    ISSN: 1573-5060
    Keywords: Corchorus olitorius ; jute ; outcrossing ; isolation distance ; planting designs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary To find out an effective isolation distance in olitorius jute experiments were conducted for three years in two planting designs; in one the cultivar with the dominant marker allele was planted at the centre and the cultivarcarrying the recessive marker allele was planted around and in the other the planting arrangement was just the reverse of the former. A total of nearly 20 lac seedlings were counted. Irrespective of the planting designs, at the minimum distance from the pollen source outcrossing was found to be at its maximum which, however, decreased with the distance. Directions had no influence on cross pollination in this species. At a distance beyond 9.0 metres outcrossing was found to be absent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00028311
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Pressure necessary to open a Griffith crack to a given shape in an orthotropic solid (1981)
    Springer
    International journal of fracture 17 (1981), S. 477-482 
    Details
    ISSN: 1573-2673
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Résumé On étudie de manière analytique la distribution des pressions nécessaires à l'ouverture d'une fissure de Griffith dans un solide orthotrope de forme prescrite. L'analyse est appliquée au cas particulier de formes d'ouverture de fissure pour lesquelles les résultats numériques sont présentés de manière graphique.
    Notes: Abstract The distribution of pressure necessary for opening a Griffith crack to a prescribed shape in an orthotropic solid, is studied analytically. The analysis is applied to a particular class of crack opening shapes for which numerical results are presented graphically.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00033342
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Syntheses of pure (9Z, 11Z), (9E, 11E), (9E, 11Z), and (9Z,11E)-9,11-hexadecadienals-possible candidate pheromones (1984)
    Springer
    Journal of chemical ecology 10 (1984), S. 795-807 
    Details
    ISSN: 1573-1561
    Keywords: (9z,11Z) ; (9E.11E) ; (9E,11Z) ; (9Z,11E)-9 ; 11-Hexadecadienals ; (9E)-hexadecen-11-yn-1-yl acetate ; syntheses ; aldehydes ; ester ; conjugated dienes ; dienals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The title compounds were prepared by six different routes, and recommendations are given for the more convenient procedures in laboratory-scale syntheses. Modifications in the literature preparations of the 9E,11E and 9E,11Z isomers are described. Baseline separation of a prepared mixture of all four isomers of the (9Z, 11Z), (9E, 11E), (9E, 11Z), and (9Z, 11E)-9,11-hexadecadienals was achieved using GC methods with standard capillary columns. [13C]NMR spectroscopy of the alkene carbon atoms clearly differentiates between theZ,Z, E,E and eitherE,Z orZ,E isomers of the precursor dienols and thus of the dienals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00988544
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Comparison of the criteria for mixed mode brittle fracture based on the preinstability stress-strain field Part I: Slit and elliptical cracks under uniaxial tensile loading (1983)
    Springer
    International journal of fracture 23 (1983), S. 281-295 
    Details
    ISSN: 1573-2673
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Résumé On compare dans les cas d'une fente oblique et de fissures elliptiques soumises à tension uniaxiale, les prédictions sur l'angle d'extension de la fissure, sur la charge critique et sur les chemins que suit la fissure instable, en se basant sur les critéres de la contrainte maximum tangentielle (CMT), de la dilatation maximale tangentielle (DMT) et de la densité d'énergie de déformation (DED). La contrainte tangentielle associée au critère CMT ne doit pas être une contrainte principale, et l'on suggère une nouvelle approche de ce critère. On propose un critère base sur la contrainte maximum tangentielle principale (CMTP) et on compare les prédictions que donnent ces deux critères. On indique certaines difficultés qui sont associées à l'application du critère DED et on suggère une base nouvelle permettant d'unifier tous les critères par rapport aux prédictions de charge critique. Certains des résultats obtenus sont comparés avec les données disponibles dans la littérature.
    Notes: Abstract Predictions for the angle of crack extension, critical load and unstable crack paths based on the criteria of maximum tangential stress (MTS), maximum tangential strain (MTSN) and strain energy density (SED) for angled slit and elliptical cracks under uniaxial tensile loading are compared. The tangential stress associated with the MTS criterion need not be a principal stress and a new approach to this criterion is suggested. A criterion based on maximum tangential principal stress (MTPS) is proposed. Predictions by these two criteria are compared. Some difficulties associated with the application of the SED criterion are indicated. A new basis, which permits a unification of all the criteria in respect of prediction of critical load, is suggested. Some of the results have been compared with data available in the literature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00020696
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Comparison of the criteria for mixed mode brittle fracture based on the preinstability stress-strain field (1984)
    Springer
    International journal of fracture 24 (1984), S. 5-22 
    Details
    ISSN: 1573-2673
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Résumé On considère des fissures en entaille et elliptiques soumises à des charges de cisaillement pur et des fissures elliptiques soumises à des charges de compression uniaxiale. On établit une comparaison des prédictions de l'angle d'extension initiale de la fissure, de la charge critique et des chemins de fissuration instables, en se basant sur les critères de la tension tangentielle maximale, de la tension principale tangentielle maximale, de la déformation tangentielle maximale et de la densité d'énergie de déformation. Les résultats présentés ici constituent un complément à ceux présentés dans la première partie de cette investigation. Certaines des prédictions théoriques ont été comparées avec des données disponibles dans la littérature. On montre que les quatre critères peuvent être appliqués de manière plus ou moins indifférente dans les cas étudiés pour prédire la direction de l'extension uniaxiale de la fissure ainsi que la charge critique. Néanmoins, les chemins de fissuration instables diffèrent selon les critères utilisés. La différence étant la plus grande dans le cas du critère de densité d'énergie de déformation. On trouve certaines difficultés à appliquer ce critère à certaines situations.
    Notes: Abstract Prediction of the angle of initial crack extension, critical load and unstable crack paths based on the criteria of maximum tangential stress (MTS), maximum tangential principal stress (MTPS), maximum tangential strain (MTSN), and strain energy density (SED) are compared for slit and elliptical cracks under pure shear loading and elliptical cracks under uniaxial compressive loading. Results presented here complement those in Part I of this investigation. Some of the theoretical predictions have been compared with data available in the literature. All the four criteria are found to be more or less equally applicable in the cases studied for the prediction of direction of initial crack extension and critical load. The unstable crack paths based on the four criteria differ, the difference being greatest for the SED criterion. Some difficulties are found on applying this criterion to some situations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00020264
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Influence of temperature rise at the crack tip on crack bifurcation (1984)
    Springer
    International journal of fracture 24 (1984), S. R23 
    Details
    ISSN: 1573-2673
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00020274
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Outcrossing and isolation requirement in kenaf (Hibiscus cannabinus L.) (1981)
    Springer
    Euphytica 30 (1981), S. 739-745 
    Details
    ISSN: 1573-5060
    Keywords: Hibiscus cannabinus ; kenaf ; outcrossing ; contamination ; isolation distance ; planting design
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary To find the isolation distance in Hibiscus cannabinus L. (kenaf), experiments were conducted for three years with two planting designs. The extent of cross pollination irrespective of the planting designs was inversely related with the distance. At a distance beyond 10.0 m, the contamination was found to be absent. Directions had no influence on the contamination. The amount of contamination varied considerably between the years.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00038803
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Tribological properties of polyesterimide and its composites (1982)
    Brookfield, Conn. : Wiley-Blackwell
    Polymer Composites 3 (1982), S. 170-173 
    Details
    ISSN: 0272-8397
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Polyesterimide (PEI) and phenol formaldehyde (PF) samples were synthesized, and composites of the two polymers, as well as composites with carbon, were prepared. Using a pinon-disc machine, the friction and wear properties of the following samples were studied in the load range of two to eight bars:Phenolformaldehyde vs. steelPhenol formaldehyde cured with hexamethylenetetramine vs. steelPolyesterimide vs steelPolyesterimide and carbon composite vs steelPhenol formaldehyde vs polyesterimidePhenol formaldehyde and polyesterimide composite vs. phenol formaldehydePhenol formaldehyde and polyesterimide composite vs. steel. The data obtained from these experiments were compared with literature data on poly(tetrafluoroethylene) and nylon, conventionally used for tribological applications. It is seen that, in terms of thermal stability, friction, and wear, PEI and PF are promising for tribological applications.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pc.750030311
    Library Location Call Number Volume/Issue/Year 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...