RESUMEN
We report on the effect of Sb on the microstructure of GaInP layers grown by metal organic vapor phase epitaxy (MOVPE). These layers exhibit a CuPtB single variant ordering due to the intentional misorientation of the substrate (Ge(001) substrates with 6° misorientation towards the nearest [111] axis). The use of Sb as a surfactant during the GaInP growth does not modify the type of ordering, but it is found that the order parameter (η) decreases with increasing Sb flux. Dark field microscopy reveals a variation of the angle of the antiphase boundaries (APBs) with Sb amount. The microstructure is assessed through high angle annular dark field (HAADF) experiments and image simulation revealing Z-contrast loss in APBs due to the superposition of ordered domains.
RESUMEN
An optical fiber power-delivery system has been developed. An analysis of the spectral response of every component in the system has been carried out. Experimental measurements of the system are presented. We obtained 205 mW of power (5.4 V, 38.3 mA), yielding 27.4% efficiency. As an application, a sensor module is optically powered. This is an electrically isolated system, inasmuch as it also sends the measured data through a fiber. Several other applications are envisaged in the fields of aerospace, avionics, and domotics.
RESUMEN
OBJECTIVE: To evaluate the results of putting into practice the Programme of Preventive Measures and Health Promotion of the SEMFYC and the level of intervention into each risk factor. DESIGN: Descriptive study of a sample of clinical records of patients included in the program. SITE. The population seen at a Health Centre. PATIENTS: A sample of 772 clinical records, 51.1% being women. Average age was 31.8. MAIN MEASUREMENTS AND RESULTS: 389 smokers, 35 people with hypertension, 175 with hypercholesterolemia, 96 heavy drinkers and 268 suffering from overweight were found. The level of intervention recorded in the clinical histories is low by the criteria of the Programme: it swings between 27.68% for overweight and 47.6% for tobacco dependency. CONCLUSIONS: The Programme of Preventive Measures and Health Promotion (PAPPS in Spanish) is seen to be useful as a method of detecting health problems in the asymptomatic population. But it needs to be followed up with some minimal intervention and control of the problem, if the desired aims are to be met.
