40 research outputs found
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
A Feedback Queueing System With Batch Arrivals, Bulk Service, and Queue-Dependent Service Time
Numerical approximations for compound geometric distributions with applications in queueing theory
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