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- Alfredo Ardila, Joseph R. Bateman, C R NiÃ±o, Erik Pulido, Dora Rivera, Carmen J. Vanegas
- Journal of communication disorders
- 1994

A questionnaire designed to assess the prevalence of stuttering and its relation with: (a) central nervous system risk factors; (b) associated disorders (allergies, migraine-type headache,â€¦ (More)

- RaÃºl Manzanilla, Luis Gerardo MÃ¡rmol, Carmen J. Vanegas
- 2010

and Applied Analysis 3 LetM be the following nonempty, closed subspace of the topological spaceCâˆž âˆ’1, 1 , C n : M { Ï† âˆˆ Câˆž âˆ’1, 1 ,C : Ï† n 0 Ï† nâˆ’1 âˆ’1 Ï† nâˆ’1 1 , n 1, 2, 3, . . . } . 2.8 The space Câˆžâ€¦ (More)

In this paper we deal with Rarita-Schwinger type operators on spheres and real projective space. First we define the spherical Rarita-Schwinger type operators and construct their fundamentalâ€¦ (More)

In this article, we show the existence of solutions to boundary-value problems, consisting of nonlinear systems of partial differential equations with constant coefficients. For this purpose, we useâ€¦ (More)

In this paper, we give criteria for instability and asymptotic instability for the null solution to the non-autonomous system of difference equations y(t+ 1) = A(t)y(t) + f(t, y(t)), f(t, 0) = 0 ,â€¦ (More)

- Alfredo Ardila, C R NiÃ±o, Erik Pulido, Dora Rivera, Carmen J. Vanegas
- Epilepsia
- 1993

The frequency of some episodic psychic symptoms (dysmnesic, perceptual, and experiential) was determined in a 2,500-subject general population sample. Correlations with some risk factors eventuallyâ€¦ (More)

In this paper we compare confocal apparatus tomography and computer tomography for medical use. Two aspects are illustrated: the process of image visualization and the dose deposition. The latterâ€¦ (More)

In this work, we construct solutions to differential difference equations with delayed and advanced arguments. We use a step derivative so that a special condition on the initial function assures theâ€¦ (More)

In this paper we study the instability of the semilinear ordinary differential equation xâ€²(t) = Ax(t) + f(t, x), where f(t, 0) = 0 and |f(t, x)| â‰¤ Î³(t)|x|, 0 â‰¤ Î± â‰¤ 1. In the case 0 â‰¤ Î± < 1, we showâ€¦ (More)

- ROMEN SAKS, Carmen J. Vanegas
- 2005

In this work, we give method to construct an explicit solutions to one spectral problem with the curl operator on a bounded cylinder. The eigenvalues of this operator are square roots of eigen-valuesâ€¦ (More)

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