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  • 1
    Electronic Resource
    Electronic Resource
    Safe surgery of lesions near the motor cortex using intra-operative mapping techniques: a report on 50 patients (1992)
    Springer
    Acta neurochirurgica 119 (1992), S. 23-28 
    Details
    ISSN: 0942-0940
    Keywords: Brain lesions ; mapping ; motor cortex ; pyramidal tract ; somatosensory evoked potentials
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In 50 patients lesions located in or adjacent to the motor strip were microsurgically removed with the help of intra-operative electrophysiological mapping of the sensorimotor cortex. Mapping consisted of cortical stimulation and/or recording of somatosensory evoked potentials. Depending on the patient's pre-operative neurological status, surprisingly good results could be achieved: The surgery resulted in increased permanent sensorimotor deficit in only 4% of cases and in improved neurological status in 30% of cases. It is concluded that surgical removal of centrally located lesions using a microsurgical technique and intra-operative mapping of the motor cortex is safe and permits extensive or radical resection of lesions, even those in the motor cortex itself.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01541777
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Fcfs-scheduling in a hard real-time environment under rush-hour conditions (1992)
    Springer
    BIT 32 (1992), S. 370-383 
    Details
    ISSN: 1572-9125
    Keywords: 05A15 ; 05C05 ; 68C15 ; 68E10 ; real-time behaviour ; FCFS scheduling ; trees ; probability ; generating functions ; singularity analysis ; asymptotics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract We investigate some real-time behaviour of a (discrete time) single server system with FCFS (first come first serve) task scheduling under rush-hour conditions. The main result deals with the probability distribution of a random variable SRD(T), which describes the time the system operates without violating a fixed task service time deadlineT. Relying on a simple general probability model, asymptotic formulas concerning the mean and the variance of SRD(T) are determined; for instance, if the average arrival rate is larger than the departure rate, the expectation of SRD(T) is proved to fulfilE[SRD(T)]=c 1+O(T −3) forT→∞, wherec 1 denotes some constant. If the arrival rate equals the departure rate, we findE[SRD(T)]∼c 2 T i for somei≥2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02074875
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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