51. |
- Fredriksson, Sverker, et al.
(författare)
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Demon deuterons
- 1981
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Ingår i: Berkeley 1981, Proceedings, High Energy Heavy Ion Study. ; , s. 423-237
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Konferensbidrag (refereegranskat)
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52. |
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53. |
- Fredriksson, Sverker, et al.
(författare)
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Probing the space-time structure of multiparticle production processes
- 1981
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Ingår i: Zeitschrift für Physik C Particles and Fields. - 0170-9739 .- 1431-5858. ; 10:2, s. 185-187
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Tidskriftsartikel (refereegranskat)abstract
- It is shown that the models for highenergy multiparticle production in which the notion of a hadronicformation time plays a central role are in disagreement with recently published compilations of the rescatter probabilities in 100 GeV/c p d and 200 GeV/c p d collisions.
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54. |
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55. |
- Greenwood, J. A., et al.
(författare)
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Discussion: “A Film Thickness Analysis for Line Contacts Under Pure Rolling Conditions With a Non-Newtonian Rheological Model” (Gecim, B., and Winer, W. O., 1981, ASME J. Lubr. Technol., 103, pp. 305–313)
- 1981
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Ingår i: Journal of tribology. - : ASME International. - 0742-4787 .- 1528-8897. ; 103:2, s. 313-316
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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56. |
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57. |
- Gustafsson, Göran, et al.
(författare)
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On the calculation of head impact motion using experimental data
- 1981
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Ingår i: Proceedings. - Bron. ; , s. 225-234
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Konferensbidrag (refereegranskat)abstract
- Numerous head impact tests have been carried out by the Biomechanics department of the Highway Safety Research Institute, University of Michigan, Ann Arbor, during the past few years. The purpose of this work is to investigate the head motion during impact loading (the unloading phase is not considered) and especially to determine if the head slips on the impactor or rotates around it. Data from three different types of tests have been analyzed: Front, side and rear impacts on human heads. The data consists of linear and angular accelerations and velocities for the head (considered as a rigid body). These four quantities are some of the most common that have been suggested as primary causes of injury. By using experimental data the position of the instantaneous point of rotation was determined as a function of time during impact loading. It was found that slip occurs between the impactor and the head with very few exceptions. It was also found that the human skull performs plane motion after front or rear impact. This is probably due to the symmetry around the midsagittal plane. In side impact on the human skull it was found that the motion is three-dimensional.
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58. |
- Gustavsson, Håkan
(författare)
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Resonant growth of three-dimensional disturbances in plane Poiseuille flow
- 1981
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Ingår i: Journal of Fluid Mechanics. - 0022-1120 .- 1469-7645. ; 112, s. 253-264
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Tidskriftsartikel (refereegranskat)abstract
- A linear mechanism for growth of three-dimensional perturbations on plane Poiseuille flow is investigated. The mechanism, resonant forcing of vertical vorticity waves by Tollmien-Schlichting waves, leads to an algebraic growth for small times. Eventually, viscous damping becomes dominant and the disturbance decays. The resonance occurs only at discrete points in the wave-number space. Nine resonances have been investigated. For these, the phase velocities range from 0.67 to 0.81 of the center-line velocity. The lowest Reynolds number for which the resonance can occur is 25. The strongest resonance appears only above a Reynolds number of 341. Also, two cases of degeneracy in the Orr-Sommerfeld dispersion relationship have been found.
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59. |
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60. |
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