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Träfflista för sökning "LAR1:cth srt2:(1990-1999)"

Sökning: LAR1:cth > (1990-1999)

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41.
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42.
  • Adawi, Tom, 1970, et al. (författare)
  • Goldstone tensor modes
  • 1998
  • Ingår i: J. High Energy Phys. 9902:001,1999.
  • Tidskriftsartikel (refereegranskat)abstract
    • In the context of brane solutions of supergravity, we discuss a general method to introduce collective modes of any spin by exploiting a particular way of breaking symmetries. The method is applied to the D3, M2 and M5 branes and we derive explicit expressions for how the zero-modes enter the target space fields, verify normalisability in the transverse directions and derive the corresponding field equations on the brane. In particular, the method provides a clear understanding of scalar, spinor, and rank r tensorial Goldstone modes, chiral as well as non-chiral, and how they arise from the gravity, Rarita-Schwinger, and rank r+1 Kalb-Ramond tensor gauge fields, respectively. Some additional observations concerning the chiral tensor modes on the M5 brane are discussed.
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43.
  • Adawi, Tom, 1970, et al. (författare)
  • Superembeddings, nonlinear supersymmetry and five-branes
  • 1997
  • Ingår i: Int.J.Mod.Phys.A13:4691-4716,1998.
  • Tidskriftsartikel (refereegranskat)abstract
    • We examine general properties of superembeddings, i.e., embeddings of supermanifolds into supermanifolds. The connection between an embedding procedure and the method of non-linearly realised supersymmetry is clarified, and we demonstrate how the latter arises as a special case of the former. As an illustration, the super-5-brane in 7 dimensions, containing a self-dual 3-form world-volume field strength, is formulated in both languages, and provides an example of a model where the embedding condition does not suffice to put the theory on-shell.
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44.
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45.
  • Adl-Zarrabi, Bijan, 1959 (författare)
  • Hygro-Elastic Deformation of High Pressure Laminates. A Macroscopic Analysis. Theoretical Modelling and Measurements
  • 1998
  • Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
    • Deformation due to environmental changes in moisture arises in many engineering problems of practical interest. The purpose of this work is to develop a theoretical model for the determination of moisture induced deformations in thin plates made of High Pressure Laminates. For the determination of moisture induced deformations, a set of material properties is required. Measuring these properties is also a part of this work. The theoretical models for moisture transfer and elastic deformation are based on Fick's law and the Kirchhoff plate theory, respectively. High Pressure Laminates are classified as a composite material and the behaviour of composites can be analysed in different classes of theoretical problems. Here, the High Pressure Laminate is treated, on the macroscopic scale of observation, as a homogeneous, elastic and orthotropic material. A basic result of the thesis is a simple procedure to account for the effect of hygro-expansion. The moisture moment integral, which essentially is proportional to moisture content profile and thickness of plate, gives a basic time-dependent function I(t) which determines the effect of any uneven moisture distribution over the cross-section of the plate. The moisture-induced moments are proportional to I(t) and they only appear as an additional term in the boundary conditions of the plate. Solutions for simply supported plates are presented for different rectangular shape and, for different stiffness and hygro-expansion coefficients in the two orthotropic directions. Two PC-programmes, MHPL and MecHPL, based on the theoretical models are developed. MHPL deals with determining the moisture content of the material and MecHPL deals with calculating the moisture induced deformations in the plate. These programmes have been validated by using existing programmes and experimental tests. The results of the validations indicate that the models and PC-programmes are correctly formulated.
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46.
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47.
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48.
  • Adlemo, Anders, 1957, et al. (författare)
  • Fault tolerance strategies in an existing FMS installation
  • 1993
  • Ingår i: Control Engineering Practice. - 0967-0661. ; 1:1, s. 127-134
  • Tidskriftsartikel (refereegranskat)abstract
    • This paper describes a case study of an FMS installation in which fault tolerance is modelled through the use of a description model called the General Recursive System (GRS). The GRS makes it possible to study different system configuration are described, called Hardware Configuration, Mission Configuration and Work Configuration. Fault tolerance, i.e. ways to overcome erroneous situations in the FMS installation, is obtained by choosing alternative system configurations. Alternative ways to describe different fault tolerance strategies within the FMS installation are illustrated through examples.
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49.
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  • Resultat 41-50 av 5719
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Wiberg, Nils-Erik, 1 ... (145)
Nordén, Bengt, 1945 (139)
Leckner, Bo G, 1936 (136)
Engström, Tomas, 195 ... (97)
Kildal, Per-Simon, 1 ... (89)
Lennartson, Bengt, 1 ... (76)
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Svensson, Arne, 1955 (72)
Skarnemark, Gunnar, ... (71)
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Medbo, Lars, 1957 (55)
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Panas, Itai, 1959 (51)
Gadde, Lars-Erik, 19 ... (46)
Gevorgian, Spartak, ... (43)
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Fabian, Martin, 1960 (40)
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