Alexander L. Frenkel

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Wavy film flow of incompressible Newtonian fluid down an inclined plane is considered. The question is posed as to the parametric conditions under which the description of evolution can be approximately reduced for all time to a single evolution equation for the film thickness. An unconventional perturbation approach yields the most general evolution(More)
We study, for the case of the two-layer plane Couette flow, the effects of inertia on the recently found instability due to insoluble surfactants. The insoluble-surfactant instability takes place even when inertia is absent provided an interface or a free surface under a nonzero shear is laden with an insoluble surfactant. Considering a normal mode of the(More)
We present an electroclinical study of 4 severe pneumococcal meningitis cases with intracranial hypertension. In addition to classical anticerebral edema therapy thiopental infusion was used. The plasma thiopental level seems to be only an incomplete indicator of cerebral drug effect, but must be measured to avoid accumulation. EEG monitoring appears to be(More)
Thirty-one neonates without any electroencephalographic activity detectable on the first EEG before day 5 were studied. In the first group (20 neonates) the first EEG was performed on day 0. Signs of foetal and/or perinatal anoxia were observed. In the second group (11 neonates), the first EEG was performed between day 1 and day 4. In 7 cases, the neonate(More)
In 49 cases (26 children, 23 adults) of proven Herpes simplex encephalitis, the authors studied the influence of age, disturbances of consciousness, time of diagnosis and therapy on patients' outcome, as well as the prognostic value of EEG data. Mortality was low in late childhood and young adulthood in spite of the constancy and depth of coma; it was very(More)
We studied the prognostic value of initial EEG in 36 children with a pneumococcal meningitis. The children were divided into 2 groups: infants under 1 year old, and children over 1 year old. The evolution was favourable in 5 cases out of 6 with normal or subnormal initial EEG. The evolution was unfavourable every time we recorded a status epilepticus. When(More)
Twenty-one newborns displaying a strictly unilateral status epilepticus were studied. Three groups have been isolated according to the aetiology: neonatal anoxia (n = 5), postcardiac surgery (n = 8), cerebral hemispheric lesions confirmed by CT scan (n = 7). The authors relate in detail the clinical features and the EEG abnormalities, ictal and interictal(More)