Electrocrystallisation of lead dioxide on glassy carbon electrodes was studied in 1 M HNO3+ 0.1 M Pb(NO3)2 in the presence of ultrasound using chronoamperometry and scanning electron microscopy. In order to compare these results with those obtained in the absence…

Shoe lasts are the moulds used in the footwear industries in order to mount the shoe. Most of the machines used in the sector to make lasts are simply mechanical copiers. CAD/CAM systems have just arrived to the shoe last…

Kogelnik's coupled-wave theory has provided a well-established basis for understanding how light propagates inside a volume hologram, giving an accurate approximation of the diffraction efficiency in this type of hologram. In this paper we elaborate on some aspects of the…

Descripción completa.

A new technique for analysing the optical quality of the human cornea is presented. Corneal maps are obtained through keratographies and then converted into phase maps. The propagated fields generated from this surface are plotted and studied. It is shown…

Bleached holograms are one of the most interesting techniques used to produce phase holograms of high quality on photographic emulsions. Of particular interest is the method of fixation-free rehalogenating bleaching. In this paper we will study the influence of the…

A point of a convex set belongs to its end in a given direction
when this direction is not feasible at that point. This paper analyzes the
properties of the directional end of general convex sets and closed convex
sets…

Bleaching is one of the most widely used techniques in the production of phase holograms of high quality on photographic emulsion, particularly in rehalogenating techniques without a fixation step. These techniques were very well understood when Agfa 8E75 HD emulsion…

As a way of forecasting future evolution of inequalities in disease burden and mortality, trends in preventive health behaviours by social class were examined. Using the Spanish National Hearth Survey from 1987 to 1997 the evolution of the Health Practices…

Study objectives: (1) To describe the union and life cycle of family rituals, such as specific habits of sharing daily meals, special events or other family activities, and (2) to analyse the relation between the practice of family rituals and…