La fractura de tobillo en el adulto: resultados clínico-radiológicos

En el presente trabajo se presenta una revisión retrospectiva de 207 fracturas de tobillo en el adulto tratadas quirúrgicamente en el hospital de Cabueñes de Gijón, entre los años 1986 y 1993. Fueron clasificadas siguiendo los criterios AO, con un seguimiento medio de 10 meses. La valoración de los resultados se realizó utilizando criterios clínico-funcionales y radiológicos, registrándose un 79% de excelentes y buenos resultados clínicos, y un 7% de reducciones no satisfactorias, presentando estas reducciones no satisfactorias una significación estadística (p< 0,01) en las fracturas Tipo C respecto a los otros dos tipos (A y B), y encontrándose variaciones estadísticas respecto al momento en que se realiza la cirugía, con una mayor proporción de resultados excelentes en aquellas fracturas tratadas de precozmente frente a las que lo fueron de forma diferida (p< 0,001).The present work shows a retrospective review of 207 adult ankle fractures operated on the Cabueñes's Hospital of Gijon from 1986 to 1993 with an average of follow-up of 19 months. They were classified according to AO criteria. The assessment of results was based on clinical functional and radiological criteria, recording 79% of excelent and good clinical results, and 7% of no satisfactory reductions. Cases with no satisfactory reductions showed statistical significance (p< 0.01) in the type C respect to the other two types (A y B). Then were also statistical differences with respect to the delay of surgery, with a higher rate of excelent results in the fractures treated early than the fractures treated with delay (p< 0.001

Convexity properties, moment inequalities and asymptotic exponential approximations for delay distributions in G1/G/1 systems

Pollaczek distributions pervade the class of delay distibutions in G1/G/1 systems with concave service time distributions. When the service time distribution has finite support and the delay distribution is absolutely continuous on (0, [infinity]), one can find a distribution with a pure exponential tail that satisfies the corresponding Wiener-Hopf integral equation except for values of the argument that belong to the support in question or to a translate thereof. Again for an exponentially decaying delay distribution, one can formulate sufficient moment inequalities which ensure the existence of asymptotic upper and lower bounds derived from M/D/1 and M/M/1 delay distributions which agree with the former in terms of the first two moments.waiting time Wiener-Hopf equation queueing inequalities compound geometric distribution exponential approximation

RESULTATS PRELIMINAIRES DE L'ETUDE DE LA REACTION 48Ti (t, α) 47Sc A UNE ENERGIE INCIDENTE DE 12 MeV

Nous avons étudié les niveaux de 47Sc au moyen de la réaction 48Ti (t, α) 47Sc à une énergie incidente de 12 MeV ; nous avons observé 23 niveaux jusqu'a une énergie d'excitation voisine de 4 MeV. Une analyse DWBA des distributions angulaires des α correspondant aux premiers niveaux de 47Sc a donné des résultats satisfaisants.The 48Ti (t, α) 47Sc reaction has been used at a bombarding energy of about 12 MeV to investigate the states of 47Sc up to about 4 MeV excitation energy. The angular distributions for the first few levels have been analysed successfully by the DWBA method