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
    Neutron measurements of the vortex lattice in YBa2Cu3O7 (invited) : 37th Annual conference on magnetism and magnetic materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 5855-5859 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Neutron diffraction has been used to measure the vortex lattice scattering for YBa2Cu3O7. A square pattern is found when the field is applied along the c axis, while a triangular pattern is found when the field is applied well away from the c axis. High-resolution measurements for the square pattern show that the vortex lattice has long-range orientational order but only short-range positional order. The temperature dependence of the penetration depth is not that expected for a superconductor with a conventional s-wave BCS-type gap. Preliminary measurements for temperatures near the irreversibility line are consistent with the occurrence of melting of the vortex lattice or glass phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.353551
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Small-angle neutron scattering study of the flux-line lattice in a single crystal of Bi2.15Sr1.95CaCu2O8+x (invited) : The 6th joint magnetism and magnetic materials (MMM)-intermag conference (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 6784-6787 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A flux-line lattice (FLL) was observed in a single crystal of Bi2.15Sr1.95CaCu2O8+x (BSCCO) using small-angle neutron scattering methods. The sample has a superconducting transition at 85 K. The flux-line lattice is observed to melt, evidenced by the rapid disappearance of diffracted intensity as the temperature is increased above a field-dependent melting temperature. Diffracted intensity due to the vortex lattice also falls off as the applied field is increased. It is believed that this is a manifestation of the transition of the three-dimensional flux lines into two-dimensional pancake vortices. The Bragg intensity of the FLL peak is inversely proportional to the fourth power of the London penetration depth (λL). Hence, the temperature (T) dependence of the order parameter can be measured quite accurately from the intensity of the Bragg spots at different temperatures. In BSCCO with an applied field of 50 mT, the measured T dependence appears linear. The low-T behavior is of great interest for an understanding of the underlying mechanism for superconductivity in these materials.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.358128
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Reliability of the electrical properties of the BF2+ ion implanted polycrystalline diamond film (1993)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 524-526 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The resistance of the BF2+ ion implanted polycrystalline diamond film drifted higher with time when the diamond film was exposed in air. The reliable resistance of the implanted diamond film could be obtained after the heat treatment at high temperature under vacuum. Temperature dependence of the reliable resistance of the BF2+ ion implanted diamond film indicated two activation energies within the temperature range from room temperature to 400 °C. The effect of gas exposure on the resistance of the implanted diamond film was discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.109993
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Effects of local facet and lattice damage on nucleation of diamond grown by microwave plasma chemical vapor deposition (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 60 (1992), S. 1559-1561 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Diamond deposition on an anisotropic etched Si and ion implanted Si surfaces have been examined here for the first time. Local facets on an anisotropic etched surface shows no nucleation of diamond. Synthetic diamond, in contrast, has been able to nucleate on an As+ or Si+ ion implanted Si substrate without diamond abrasive pretreatment. Selective deposition of diamond occurs only for low dose ion implantation, 100 keV 1014 cm−2, but not for high dose ion implantation, 100 KeV 1016 cm−2. Strain is proposed as the main reason for nucleation of diamond on the ion implanted Si substrates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.107250
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Reliability of ferrocement slabs under cyclic thermal-shock loading (1992)
    Springer
    Materials and structures 25 (1992), S. 476-481 
    Details
    ISSN: 1359-5997
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Description / Table of Contents: Resume On examine la fiabilité de dalles de ferrociment en service soumises à une sollicitation cyclique de chocs thermiques causés par une chute de pluie. Les données sont obtenues expérimentalement en soumettant des éprouvettes à des cycles chauffage/humidification, et on contrôle la résistance à la fissuration initiale résiduelle à différentes périodes. Les sollicitations imposées par chocs thermiques simulent les conditions véritables de service et elles sont évaluées en contrôlant pendant un certain temps la température de dalles de toitures typiques. On utilise la détérioration moyenne de la résistance obtenue, après correction en raison des effets de cure liés au vieillissement et à la température, ainsi que l'incertitude existante, pour évaluer la fiabilité des dalles qui présentent une résistance à la fissuration initiale résiduelle supérieure à des valeurs prescrites pour différentes périodes. Les résultats montrent que les dalles de ferrociment ont une bonne résistance à la flexion par rapport aux sollicitations cycliques étudiées, et peuvent être utilisées comme éléments de toiture.
    Notes: Abstract The reliability of ferrocement slabs subjected to cyclic thermal-shock loading induced by raindrops during service is investigated. The data are obtained experimentally by subjecting specimens to heating and wetting cycles and monitoring the residual first-crack strength at different periods. The imposed thermal-shock loads simulate actual service conditions and are estimated by monitoring the temperature of typical roofing slabs just before the commencement of rain over a period of time. The mean deterioration in strength obtained after correcting for curing effects due to ageing and temperature, as well as the uncertainty present, are used to assess the reliability of slabs having residual first-crack strengths above some prescribed values at different periods. The results indicate that ferrocement slabs posses good flexural resistance with respect to the cyclic loadings studied and are suitable for use as roofing elements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02472637
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    L 2-approximation by the translates of a function and related attenuation factors (1991)
    Springer
    Numerische Mathematik 60 (1991), S. 549-568 
    Details
    ISSN: 0945-3245
    Keywords: 41A15 ; 42A16 ; 65D07
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Summary Let be thek-dimensional subspace spanned by the translates ϕ(·−2πj/k),j=0, 1, ...,k−1, of a continuous, piecewise smooth, complexvalued, 2π-periodic function ϕ. For a given functionf∈L 2(−π, π), its least squares approximantS kf from can be expressed in terms of an orthonormal basis. Iff is continuous,S kf can be computed via its discrete analogue by fast Fourier transform. The discrete least squares approximant is used to approximate Fourier coefficients, and this complements the works of Gautschi on attenuation factors. Examples of include the space of trigonometric polynomials where ϕ is the de la Valleé Poussin kernel, algebraic polynomial splines where ϕ is the periodic B-spline, and trigonometric polynomial splines where ϕ is the trigonometric B-spline.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01385736
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Variational formulation of stability problems for thin-walled members (1973)
    Springer
    Archive of applied mechanics 43 (1973), S. 58-68 
    Details
    ISSN: 1432-0681
    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: Übersicht Die beschreibenden Differentialgleichungen für dünnwandige Bauglieder, die durch achsiale Kräfte, biachsiale Biegung und Torsion beansprucht sind, werden nach einem Variationsverfahren aufgestellt. Die so erhaltenen Gleichungen unterscheiden sich etwas von den zur Zeit üblichen Gleichungen. Um die Eigenschaften der jetzt vorgeschlagenen Gleichungen zu zeigen, werden numerische Ergebnisse für einige einfache Aufgaben angegeben.
    Notes: Summary The governing equations for thin-walled members subjected to axial force, biaxial bending and torsion are formulated by variational method. The resulting equations differ slightly with currently accepted governing equations. Numerical examples are solved for simple problems to illustrate some of the features of the proposed equations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00536579
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Finite element analysis of elastic-plastic plane stress problems based upon Tresca yield criterion (1970)
    Springer
    Archive of applied mechanics 39 (1970), S. 73-86 
    Details
    ISSN: 1432-0681
    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: Übersicht Es wird eine „finite element”-Methode vorgeschlagen zur Berechnung zweidimensionaler elastischplastischer Baukonstruktionen, die einem ebenen Spannungszustand mit monoton wachsender Last unterworfen sind. Das Belastungs-Verformungs-Verhalten und die Ausbreitung der Fließbereiche bis zum plastischen Zusammenbruch werden untersucht. Das Material soll der Fließbedingung von Tresca genügen. Spannungs-Verformungs-Berechnungen für die Ränder und Ecken des Tresca-Bereiches werden in Komponenten der Spannungen und Dehnungen längs der Achsriclitungen eines festen Bezugssystems und der Hauptspannungsrichtungen ausgedrückt. Die Belastung wird in kleinen Stufen aufgebracht, und die Hauptspannungsrichtungen werden für jedes plastische Teilchen während des Lastaufbringens durch Interpolation bestimmt. Die so erhaltenen Spannungen genügen der Fließbedingung. Durch numerische Beispiele wird die Genauigkeit des vorgeschlagenen Verfahrens demonstriert.
    Notes: Summary A finite element technique for the elastic-plastic analysis of two dimensional structures subjected to conditions of plane stress and monotonically increasing loads is presented. The complete load deformation history as well as the propagation of the yield zones in the structure up to plastic collapse are studied. The material is assumed to be elastic-perfectly plastic and yielding is governed by Tresca yield condition. Plastic stress-strain relations for the sides and corners of Tresca yield condition are derived in terms of the components of the stresses and strains along a fixed reference coordinate system and the direction of the principal stress. The load is applied in small increments and the principal stress direction for each plastic element during a load increment is determined by an interpolation technique which leads to stresses that satisfy the yield condition. Numerical examples are given to illustrate the accuracy of the results obtained by the proposed method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00532658
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Direct observation of magnetic flux lattice melting and decomposition in the high- T c superconductor Bi 2.15 Sr 1.95 CaCu 2 O 8+x (1993)
    [s.l.] : Nature Publishing Group
    Nature 365 (1993), S. 407-411 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The flux line lattice inside a single crystal of Bi2.15Sr1.95CaCu2O8+x has been observed using small-angle neutron diffraction. The diffracted intensity goes rapidly to zero at a magnetic-field-dependent flux lattice melting temperature; ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/365407a0
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Construction of lattices for lagrange interpolation in projective space (1991)
    Springer
    Constructive approximation 7 (1991), S. 283-297 
    Details
    ISSN: 1432-0940
    Keywords: 41A05 ; 41A10 ; 41A63 ; 51N15 ; Projectivek-space ; Lagrange interpolation ; Projective transformation ; de Casteljau-Neville-Aitken algorithm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract In this article we construct a lattice of points which lie onk+1 pencils of hyperplanes in the projectivek-space, where, with a suitable choice of coordinate system, simple equations of the hyperplanes are obtained. This enables us to construct an interpolation formula on the projectivek-space from which interpolating polynomials on a general class of lattices in the Euclideank-space are obtained via a projective transformation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01888158
    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...