The Falls of Niagara : being a complete guide to all the points of interest around and in the immediate neighbourhood of the great cataract with views taken from sketches by Washington Friend, and from photographs. --

Includes index.

A generic formula for the values at the boundary points of monic classical orthogonal polynomials

In a previous paper we have determined a generic formula for the polynomial solution families of the well-known differential equation of hypergeometric type σ(x)y"n(x)+τ(x)y'n(x)-λnyn(x)=0. In this paper, we give another such formula which enables us to present a generic formula for the values of monic classical orthogonal polynomials at their boundary points of definition.

Body mass index as a standard of living measure: a different interpretation for the case of Colombia

We analyze the Body Mass Index (BMI) in a distinct way of its traditional use and it lets us use it as a proxy of standard of living for the case of Colombia. Our approach is focused on studying how far the people are from the normal range and not on the score of each one and this lets us to treat equally extreme cases as severe thinness and obesity. We use a probabilistic model (Ordered Probit) that evaluates the probability of being within the normal range or another level. We found that socioeconomic variables have a significant effect on the dependent variable and that there are no linear effects. Besides, people with difficulties for walking and adults have less probability of having a normal BMI.

The roman invasion : from different points of view.

Texto con ilustraciones destinado a los alumnos de Primaria para que aprendan acontecimientos históricos desde los diferentes puntos de vista de sus protagonistas. Aquí se narra el enfrentamiento entre el emperador Claudio y el jefe de las tribus de Britania ante la invasión romana de la isla.

The vikings : from different points of view.

Los acontecimientos históricos se acercan a los alumnos de Primaria desde los diferentes puntos de vista de sus protagonistas. Se narra la vida y viajes del pueblo vikingo y su ataque a Inglaterra como la lucha de un pueblo procedente de un país pobre en busca de una tierra rica.

Quality of life measure for adolescents and children with hearing loss

The purpose of this investigation was to determine the impact of hearing loss on the quality of life of adolescents and children. Focus group sessions were held for parents and children or adolescents with hearing loss to discuss their perceptions. Quality of life questionnaires were developed for adolescents and children with hearing loss.