RESUMEN
Approximately 11% of pregnant women suffer from major depression which requires treatment and if left untreated there are risks of preterm delivery or low birth weight. The initial difficulty lies in diagnosing the depression itself, as many symptoms of depression can be ascribed to the pregnancy. A further challenge is choosing the appropriate therapy. Treatment options are psychotherapy, antidepressants, electroconvulsive therapy (ECT) or the new possibility of light therapy. A growing number of reports on the side effects of antidepressants in pregnancy have led to uncertainties as to how to proceed. Thus, choosing the most suitable treatment needs to be made together with the pregnant woman and a careful clarification of possible risks attendant on each treatment option is essential.
Asunto(s)
Antidepresivos/uso terapéutico , Depresión/terapia , Terapia Electroconvulsiva/métodos , Fototerapia/métodos , Complicaciones del Embarazo/terapia , Psicoterapia/métodos , Depresión/psicología , Femenino , Humanos , Embarazo , Complicaciones del Embarazo/psicologíaRESUMEN
It is shown that the generalizations to more than one space dimension of the pole decomposition for the Burgers equation with finite viscosity nu and no force are of the form u=-2nu inverted Delta ln P, where the P's are explicitly known algebraic (or trigonometric) polynomials in the space variables with polynomial (or exponential) dependence on time. Such solutions have pole singularities on the complex algebraic varieties.
RESUMEN
The asymptotic decay of passive scalar fields is solved analytically for the Kraichnan model, where the velocity has a short correlation time. At long times, two universality classes are found, both characterized by a distribution of the scalar-generally non-Gaussian-with global self-similar evolution in time. Analogous behavior is found numerically with a more realistic flow resulting from an inverse energy cascade.
RESUMEN
A Lagrangian method is used to show that the power law with a -7/2 exponent in the negative tail of the probability distribution function (PDF) of the velocity gradient and of velocity increments, predicted by E et al. [Phys. Rev. Lett. 78, 1904 (1997)] for forced Burgers turbulence, is also present in the unforced case. The theory is extended to the second-order space derivative whose PDF has power-law tails with exponent -2 at both large positive and negative values and to the time derivatives. PDF's of space and time derivatives have the same (asymptotic) functional forms. This is interpreted in terms of a random Taylor hypothesis.
RESUMEN
This paper presents first results concerning the three-dimensional ultrasonic data acquisition, the textural analysis of different classes of tissues and the tissue-specific display of mastopathic regions within the female breast, revealing its benefit for diagnosis.