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  • 1
    Electronic Resource
    Electronic Resource
    Mixing length scales: step meandering and island nucleation on vicinal surfaces (2003)
    Springer
    The European physical journal 36 (2003), S. 141-147 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. Simultaneous island nucleation and step flow growth on vicinal surfaces are studied by Monte Carlo simulations. Step edges experience meandering instability under growth conditions if there is a kink barrier suppressing adatom jumps around kink sites. This instability has a characteristic length scale, with different scaling properties from the island separation scale. We show that there is a coupling between island nucleation and step edge instability. The length scale associated with nucleation begins to couple with the wavelength of the step edge patterns when islands and steps coalesce. Only in the submonolayer regime step meandering is independent of island formation. In this regime the island separation has a cross-over scaling behaviour as terrace width is varied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjb/e2003-00327-8
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  • 2
    Electronic Resource
    Electronic Resource
    Island growth in submonolayer deposition with aggregation and fragmentation (2003)
    Springer
    The European physical journal 36 (2003), S. 567-572 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. Island growth is studied in the case of island aggregation and break-up during submonolayer deposition. It is demonstrated that the island size distributions are of the scaling form and the mean island size has a power-law behaviour corresponding to hyperthermal deposition conditions. The corresponding scaling exponents are analytically derived and compared with the simulations by the revised particle coalescence method developed here. The scaling exponents are found to depend only on the homogeneity exponents of aggregation and fragmentation kernels.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjb/e2004-00012-6
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  • 3
    Electronic Resource
    Electronic Resource
    Healing of experimental ligament rupture: Findings by scanning electron microscopy (1984)
    Springer
    Archives of orthopaedic and trauma surgery 102 (1984), S. 179-182 
    Details
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei 16 Ratten wurde das mediale Kollateralband der Kniegelenke durchtrennt. 16 Ligamente wurden der Spontanheilung überlassen. Die anderen 16 Bänder wurden unverzüglich unter dem Operationsmikroskop genäht. Vier scheinoperierte Ratten dienten zur Kontrolle. Die Ligamente von jeder Gruppe wurden nach einer Immobilisation von 4–5 Wochen im Raster-Elektronenmikroskop untersucht: Bei den Kontroll-Ligamenten wurden hauptsächlich Kollagen-Faserbündel von variablem Durchmesser gefunden. Zwischen den Faserbündeln lagen zahlreiche dünne Fibrillen. Die operativ wiederhergestellten Bänder zeigten ein mikroskopisches Bild, welches oft schwer von den Kontrollbildern zu unterscheiden war. Die nichtgenähten Bänder hingegen zeigten ein viel bunteres Bild. In einigen Fällen war die Ligamentheilung durch eine extensive Narbenbildung blockiert. Bei vielen nichtgenähten Bändern wurde jedoch auch eine beginnende Regeneration festgestellt. Die Untersuchung im Raster-Elektronenmikroskop hat sich für experimentelle Studien der Ligament-Heilung als sehr nützlich erwiesen.
    Notes: Summary The medial collateral ligaments of the knee joints of 16 rats were cut. Sixteen ligaments were allowed to heal spontaneously while the others were immediately sutured under the microscope. Four sham-operated immobilized rats served as controls. The ligamentous healing was registered after 4–5 weeks of immobilization under a scanning electron microscope (SEM). In the control ligaments, collagen bundles of variable thickness were observed as the main supporting elements. Numerous thin fibers were seen between the bundles. The surgically corrected ligaments showed a microstructural picture often difficult to distinguish from the controls. The unsutured ligaments, however, showed a much more variable picture. In some unsutured cases ligamentous regeneration was blocked by extensive scar formation. In many unsutured cases, however, signs of ligamentous regeneration were observed. It was noted that the SEM is a useful and sophisticated tool for studies on ligament healing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00575229
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  • 4
    Electronic Resource
    Electronic Resource
    A prospective study of the treatment of severe tears of the lateral ligament of the ankle (1987)
    Springer
    International orthopaedics 11 (1987), S. 13-17 
    Details
    ISSN: 1432-5195
    Keywords: Ligament injuries ; Ankle joint
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Une recherche prospective randomisée a été réalisée pour comparer les traitements par bandage adhésif, par immobilisation plâtrée et par opération conjuguée au plâtre dans les lésions récentes du ligament latéral externe de la cheville. Le recul est de deux ans. Sur le plan subjectif la sensation d'instabilité de la cheville était le seul paramètre qui plaidait clairement en faveur de l'opération. L'examen objectif comportant notamment des clichés sous deux incidences en vue d'objectiver des mouvements anormaux de la tibiotarsienne n'a cependant pas fait apparaître de différences statistiques entre les trois modes de traitement. Après traitement par bandage l'instabilité était un peu plus fréquente qu'après les autres traitements mais toutefois sans nette différence statistique. Enfin les entorses des sujets de plus de 40 ans ont guéri nettement moins bien que celles des patients plus jeunes. Les entorses graves du cou de pied devraient donc être traitées opératoirement chez les sujets physiquement actifs et de moins de 40 ans. Pour les lésions des patients plus âgés on recommandera un traitement conservateur que l'on pourra compléter ultérieurement par une reconstruction, si cela s'avère nécessaire.
    Notes: Summary A prospective randomized clinical study was undertaken to compare bandaging, plaster cast immobilisation and operative treatment for recent tears of the lateral ligament of the ankle. The follow-up period was two years. Subjectively, only the fear of giving-way showed a clear difference in favour of operative repair. Objective evaluation, including stress radiographs, demonstrated no statistical differences between the three methods of treatment. Although bandaging appeared somewhat less satisfactory with respect to the resulting stability of the ankle, the differences were not statistically significant. The lateral ligament in patients over 40 years of age showed a statistically significant tendency to heal less well than that of younger patients. Severe ankle sprains in patients under 40 years of age should preferably be treated by operation, especially in younger patients and if the person is physically active. Lateral ligament tears in patients over 40 years of age should be treated conservatively and a secondary reconstruction carried out later, if necessary.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00266052
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    Paper (German National Licenses)
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