Este artículo presenta los resultados de un estudio sobre la utilización que hacen los jóvenes andaluces de las redes sociales. Los objetivos fundamentales son: conocer los usos preferentes de las redes sociales, su frecuencia y los motivos que les impulsan a su utilización. Además se estudia si existen diferencias de sexo tanto en la frecuencia como en las motivaciones de uso. Se aplica un cuestionario para la recogida de datos. La muestra es de 1.487 adolescentes de Andalucía. Los resultados muestran que los jóvenes en su mayoría usan de manera habitual las redes sociales y se identifican dos vertientes motivacionales en su uso: una social y otra psicológica. No se hallan diferencias significativas entre sexos en cuanto a frecuencia de uso, pero sí en las motivaciones para su acceso. Las de los chicos son de tipo emocional, mientras que en las chicas predomina la motivación de carácter relacional. Los resultados obtenidos muestran coincidencias con investigaciones internacionales realizadas en contextos muy diferentes al presente estudio. En la discusión de resultados se plantean futuras líneas de trabajo, a la vez que se identifican implicaciones que los usos de las redes sociales tienen para la formación e integración social de una ciudadanía activa y participativa, así como para el enriquecimiento de dimensiones como el desarrollo del capital social y la educaciónThis article presents the results of a study on the use of social networks among young Andalusians. The main objectives are to know the uses of social networks, their frequency and the motives behind their use. A questionnaire was used to collect the data. The sample includes 1487 adolescents in Andalusia. The results show that young people, for the most part, consistently used social networks. We identified two motivational aspects in this use: one social and the other psychological. There are not significant gender differences in frequency of use, but rather in the motivations for access. Boys tend to be the more emotional type, while girls were dominated by a more relational motivation. The results show similarities with international researches in environments that vary greatly from the present work. The conclusions suggest the need for future lines of work. This study also identifies the implications of social network uses for active citizenship and participatory training and social integration. These results are also important for the enrichment of dimensions such as social capital development and education

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Clinical evaluation of nutritional status (NS) was performed in 75 rheumatoid arthritis patients. They were distributed according to functional class, radiological stage and other prognostic factors (rheumatoid factor, extraarticular disease, disease duration). Evaluation of the different anthropometrical measurements in this group of long-standing RA patients (average disease duration: 10 years) revealed a significant impairment of lean body mass (LBM), especially among those with greater disability (Functional Class III and IV). Patients in more severe radiological stages (Radiological Stage III and IV) or patients with extraarticular disease also presented a significant loss of LBM compared with a matched cohort of the general population and patients with a more benign-course disease. There was less impairment of the fat mass, according to our clinical evaluation. Serological parameters of undernutrition (albumin and transferrin) did not show significant differences among the groups of patients. Clinical evaluation of NS in RA patients is a useful procedure for recognising patients at high risk of related complications by means of their poor nutritional status.

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Mitos y realidades de la minería aurífera en Colombia ResumenDe la mano de expertos nacionales, este libro analiza nueve de los mitos en torno a este tema en el país, relacionados con temas ambientales, sociales, jurídicos y económicos y, desde ahí, el libro explora la bibliografía existente que se encuentra en revistas científicas indexadas, estudios internacionales, documentos oficiales, normatividad y jurisprudencia, y lo complementa con la revisión de estudios de impacto ambiental, entrevistas a funcionarios y visitas de campo a proyectos mineros. Se espera que este aporte de la academia sea una oportunidad para generar una discusión respetuosa, imparcial y crítica sobre los argumentos a favor y en contra de la minería de oro en el país, que sin duda será un referente fundamental para todos aquellos interesados en conocer más sobre este sector.

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patients with ankylosing spondylitis (AS), and to look for correlations with clinical findings, plain radiography and pulmonary function testing. Methods 28 patients with AS meeting the modified New York criteria and without history of respiratory symptoms were enrolled prospectively: 25 men (89.2%) and 3 women with mean age of 37.8 (9.1) years and mean disease duration of 7. 8 (4.6) years [0.4-19]. All patients underwent posteroanterior plain chest radiography, HRCT and pulmonary function tests.Results HRCT revealed abnormalities in 17 patients (60.7%): these included interstitial lung disease (n = 2), paraseptal emphysema (n = 2), apical fibrosis (n = 2), bronchiectasis (n = 1), and non-specific interstitial lung disease (n = 11). Plain radiography was abnormal in only 2 cases. Comparison between patients with and without defined thoracic HRCT abnormalities showed no differences in age, sex, disease duration, history of smoking, radiological scores (syndesmophytes score, BASRI) or ESR but showed significant statistical difference in symptomatic severity parameters (Schöber, BASMI, BASDAI). Pulmonary function tests showed a restrictive process in four patients in whom three had an abnormal chest HRCT and an obstructive process in two patients in whom one had emphysema and apical fibrosis on chest HRCT. Conclusion This study, which describes thoracic HRCT findings in patients with AS and without respiratory symptoms, confirms the high prevalence of a spectrum of abnormalities undetectable on standard plain radiography.