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  • 1
    Electronic Resource
    Electronic Resource
    Time-resolved measurements of total temperature and pressure in the vortex street behind a cylinder (1990)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 2 (1990), S. 971-978 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Recent theoretical and numerical investigations revealed the prospect that the instantaneous total temperature becomes separated around vortices; once time averaged, however, the wake behind a bluff body takes the guise of a colder wake, displaying the so-called Eckert–Weise effect. For low Mach number flows, the instantaneous total pressure was also shown to become separated in such a similar manner that the near-wake patterns of instantaneous total pressure exhibit almost exact facsimiles of those of total temperature. In this paper the results from the time-accurate measurements of fluctuating total temperature and pressure are presented. The data were obtained by placing a time-resolved aspirating probe in the vortex street behind a cylinder. The free-stream Mach number was 0.4 and the Reynolds number based on the cylinder diameter was 2.3×105. The maximum magnitude of the rms fluctuations of total temperature are of the order of 15 ° K—about 5% of the upstream total temperature. Maximum fluctuations in total pressure are approximately 10% of the upstream total pressure. Not only are the time traces of the total temperature and pressure taken in the near-wake qualitatively similar, but also quantitatively they agree with the predictions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.857604
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  • 2
    Electronic Resource
    Electronic Resource
    Illustrative examples of streaklines in unsteady vortices: Interpretational difficulties revisited (1986)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 29 (1986), S. 3474-3477 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: As a preventive measure against false interpretations of the streakline pattern in unsteady flows, streaklines calculated for an isolated vortex and the infinite Kármán vortex street are presented, which appear to create a visual impression of apparent growth and flow reversal, while in reality they do not exist.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.865814
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Corewise cross-flow transport in hairpin vortices—The "tornado effect'' (1993)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 5 (1993), S. 3167-3174 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: There is increasing awareness that even in fully turbulent boundary layers, large-scale structures in the form of hairpin vortices abound. Although their implications are not all that clear at the present time, they seem to play an important role in turbulent flows. Due to the inherent unpredictability of hairpin vortices in their natural state, in the past effort has been made to generate synthetic hairpin vortices in a laminar boundary layer; from their study considerable insight into the processes underlying various features of turbulent flows has been gained. Contrary to those preceding studies where attention has been directed to the flows external to hairpin vortices, interest here is focused solely upon their interiors: the possible existence of cross-flow transport inside the cores of the hairpin legs. In synthetic hairpin vortices, the presence of such a corewise transport away from a wall surface, or the "tornado effect,'' is substantiated in a water tunnel with flow visualization techniques. The effect is also verified using heated fluid injected near the wall surface by measuring the temperature at various points along the hairpin vortex core.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.858673
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  • 4
    Electronic Resource
    Electronic Resource
    Multicentric localized giant cell tumour of the tendon sheath: two separate lesions at different sites in a finger (2002)
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 147 (2002), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2133.2002.484115.x
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  • 5
    Electronic Resource
    Electronic Resource
    Effect of basic fibroblast growth factor on the healing of defects in the canine anterior cruciate ligament (1997)
    Springer
    Knee surgery, sports traumatology, arthroscopy 5 (1997), S. 189-194 
    Details
    ISSN: 1433-7347
    Keywords: Key words Anterior cruciate ; ligament ; Partial tear ; Basic ; fibroblast growth factor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Sports Science
    Notes: Abstract The effect of basic fibroblast growth factor (bFGF) on the healing of partial anterior cruciate ligament (ACL) lacerations was investigated in 17 adult mongrel canines. The defect was created in the midsubstance of both ACLs using a biopsy punch. In the bFGF group, a bFGF-impregnated pellet was sutured to the infrapatellar fat pad close to the defect. In the control group, the same pellet without bFGF was used. The healing process was evaluated macroscopically and histologically at 1, 3, 6, and 24 weeks postoperatively. In the bFGF group, a pannus-like tissue which contained abundant blood vessels extended into the defect from the adjacent synovial tissue in the early postoperative phase. Histological examination of the tissue which filled the defect revealed initial remodeling processes with a decreased number of cells and better orientation of the collagen fibers at 6–24 weeks. On the other hand, in the control group, poor healing processes were observed at each examination period. This study demonstrated that the application of a bFGF-impregnated pellet may enhance the healing potential of a partially injured ACL. Enhanced neovascularization and the formation of granulation tissue induced by bFGF early in the healing process accounted for the increased healing response.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001670050049
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  • 6
    Electronic Resource
    Electronic Resource
    Evaluation of functional deficits determined by four different hop tests in patients with anterior cruciate ligament deficiency (1998)
    Springer
    Knee surgery, sports traumatology, arthroscopy 6 (1998), S. 241-245 
    Details
    ISSN: 1433-7347
    Keywords: Key words Anterior cruciate ; ligament ; Knee ; Function ; One leg hop test
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Sports Science
    Notes: Abstract The purpose of this study was to analyze the validity of the newly designed functional ability test (FAT) for the normal population and patients with deficiency of the anterior cruciate ligament (ACL). The FAT consists of four tests: the figure-of-eight hop, the up-down hop, the side hop, and the single hop. Sixty control subjects and 50 patients with unilateral ACL deficiency were tested. In the control group, the values measured were significantly different between males and females in all of the tests. On the other hand, when left/right difference values were compared, no significant difference was found between males and females in any of the tests. More than 95% of control group exhibited symmetrical function in each part of the FAT, whereas in the ACL-deficient group, the percentage of patients who showed abnormal symmetry was 68% in the figure-of-eight hop, 58% in the up-down hop, 44% in the side hop, and 42% in the single hop. The percentage of ACL-deficient patients with functional asymmetry in at least one of the four tests was 82%. The FAT was found to be useful in evaluating lower limb function in ACL-deficient patients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001670050106
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  • 7
    Electronic Resource
    Electronic Resource
    Localization of growth factors in the reconstructed anterior cruciate ligament: immunohistological study in dogs (2000)
    Springer
    Knee surgery, sports traumatology, arthroscopy 8 (2000), S. 120-126 
    Details
    ISSN: 1433-7347
    Keywords: Key words Anterior cruciate ¶ligament ; Reconstruction ; Growth factor ; Remodeling ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Sports Science
    Notes: Abstract This study was designed to examine localization of the growth factors in the autogenous patellar tendon graft used to reconstruct the anterior cruciate ligament (ACL) in the canine model. Among the various growth factors, basic fibroblast growth factor, transforming growth factor-β1, and platelet-derived growth factor were selected for analysis as potential factors that regulate graft remodeling processes. In the control patellar tendon and the ACL only basic fibroblast growth factor was positively stained. In the reconstructed graft increased levels of staining for all the three factors were observed in the early postoperative period, reaching the greatest expression 3 weeks after implantation. Thereafter immunoreactivity of these growth factors decreased and returned to the preoperative levels, which were similar to that of the control ACL 12 weeks postoperatively. This rapid reduction in the level of their localization indicates that once the extrinsic cells are infiltrated to the graft and revascularization completed, these growth factors may have less significance for subsequent remodeling.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001670050198
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  • 8
    Electronic Resource
    Electronic Resource
    A new fibular osteotomy in association with high tibial osteotomy (a comparative study with conventional mid-third fibular osteotomy) (2000)
    Springer
    International orthopaedics 24 (2000), S. 227-230 
    Details
    ISSN: 1432-5195
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé  En cas d’ostéotomie supérieure du tibia, nous décrivons une nouvelle technique d’ostéotomie péronière avec énucléation et morcellement de la tête du péroné. On peut employer pour ce faire la même incision cutanée que pour l’ostéotomie du tibia. L’incidence de complications est faible.
    Notes: Abstract  A new technique for dividing the fibula when performing a high tibial osteotomy is described. The head of the fibula is enucleated and morselized. The technique is simple and safe with a low complication rate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002640000151
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  • 9
    Electronic Resource
    Electronic Resource
    Efficacy of the axially loaded pivot shift test for the diagnosis of a meniscal tear (1999)
    Springer
    International orthopaedics 23 (1999), S. 271-274 
    Details
    ISSN: 1432-5195
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé   Ils évaluent prospectivement la précision diagnostique de cinq différentes épreuves cliniques employées pour confirmer des déchirures méniscales chez des 160 sujets ayant subi une évaluation arthroscopique. Soixante–neuf pour cent (109) des genoux contrôlés par les auteurs présentaient une carence arthrocinétique complexe. Ils ont observé 144 déchirures méniscales sur 130 genoux. Toutes les épreuves cliniques présentaient généralement une sensibilité inférieure à leur spécificité. Quant au test de déplacement du pivot sous charge axiale, le fait que sa valeur diagnostique est, dans l’ensemble, significativement supérieure à celle des autres manoeuvres diagnostiques en fait un supplément de choix dans l’arsenal diagnostique.
    Notes: Abstract  Although magnetic resonance imaging (MRI) has improved the diagnostic accuracy of meniscal pathology, the authors believe that physical examination remains essential to the evaluation of knee pathology. In this study, the diagnostic accuracy of five clinical tests for meniscal pathology was prospectively evaluated in 160 patients, who thereafter underwent arthroscopy. 69% (109 knees) of the knees tested had associated ACL deficiency. There were 144 meniscal lesions in 130 of the 160 knees which were examined. The sensitivity of the tests was lower than the specificity. Conventional tests such as McMurray and Apley tests showed a low accuracy rate of 45% and 28% respectively. The diagnostic value of the axially loaded pivot shift test was significantly higher, indicating that this remains a useful diagnostic aid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002640050369
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  • 10
    Electronic Resource
    Electronic Resource
    Juxta-articular hemangioma of long bone (2000)
    Springer
    Skeletal radiology 29 (2000), S. 535-537 
    Details
    ISSN: 1432-2161
    Keywords: Key words Computed tomography ; Intraosseous hemangioma ; Magnetic resonance imaging ; Epiphysis equivalent ; Tibia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  We report on a rare case of an intraosseous hemangioma involving the proximal tibia in a 70-year-old man. Radiographically, the lesion was a well-defined osteolytic lesion with marginal sclerosis. The CT images demonstrated a well-defined osteolytic lesion with partial cortical breakthrough. T1-weighted MR images showed a hypointense lesion, while T2-weighted images revealed hyperintense areas, with internal, hypointense septa. Gadolinium-enhanced T1-weighted images showed lattice-like enhancement of the lesion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002560000256
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