Una aproximación dinámica a la medición del riesgo de mercado para los bancos comerciales en Colombia.

En este artículo se describe la metodología utilizada para la medición del riesgo de mercado llevada a cabo en el Reporte de Estabilidad Financiera, mediante el uso de técnicas dinámicas no sólo en la modelación de volatilidades sino también de correlaciones. La medida de Valor en Riesgo (VeR) se calculó individualmente para los bancos comerciales con periodicidad semanal entre febrero de 2003 y febrero de 2008. Los cálculos de los VeR estáticos y dinámicos muestran diferencias cuantitativas significativas en períodos de turbulencia, lo que resalta la importancia de las nuevas medidas de riesgo propuestas.

e-WASTE: Everything an ICT Scientist and Developer Should Know

[EN] Every dazzling announcement of a new smart phone or trendy digital device is the prelude to more tons of electronic waste (e-waste) being produced. This e-waste, or electronic scrap, is often improperly added to common garbage, rather than being separated into suitable containers that facilitate the recovery of toxic materials and valuable metals. We are beginning to become aware of the problems that e-waste can generate to our health and the environment. However, most of us are still not motivated enough to take an active part in reversing the situation. The aim of this article is to contribute to increase this motivation by pointing out the significant problem that e-waste represents and its social and environmental implications. We have chosen this forum in which multidisciplinary researchers in ICT from all countries access on regularly to explain the serious problems we are exposed to when we do not make a responsible and correct use of technology. In this paper, we also survey the composition of contemporary electronic devices and the possibilities and difficulties of recycling the elements they contain. As researchers, our contributions in science enable us to find solutions to current problems and to design more and more powerful intelligent devices. But responsible researchers must be aware of the negative effects that this industry causes us and, consequently, assume their commitment with more sustainable designs and developments. Therefore, the knowledge of e-waste issues is crucial also in the scientific world. Researchers should consider this problem and contribute to minimize it or find new solutions to manage it. These must be the additional challenges in our projects.This work was supported in part by the Spanish Ministry of Economy and Competitiveness under Grant TIN2013-43913-R.Pont Sanjuan, A.; Robles Martínez, A.; Gil, JA. (2019). e-WASTE: Everything an ICT Scientist and Developer Should Know. IEEE Access. 7:169614-169635. https://doi.org/10.1109/ACCESS.2019.2955008S169614169635

Road accidents in Spain: Are they persistent?

Traffic accidents involve great costs both at an economic and a human level. This demands that governments implement strategies to reduce their number and impact. The knowledge of the nature of the phenomenon through the study of time series of accidents enables the design of suitable policies for the desired objectives to be achieved. Thus, this paper deals with the analysis of the statistical properties of the number of road accidents on Spanish roads by using time series techniques based on the concept of fractional integration. The results indicate that the series examined display very low degrees of persistence, with the orders of integration being around 0 and thus showing a short memory pattern. This implies that shocks will be transitory, disappearing fast, and requiring strong policy measures in the case of positive shocks that reduce the number of deaths if we want to maintain that effect in the long run.pre-print1174 K

Luxación Traumática de Cadera en el Niño

La luxación traumática de cadera en el niño es una lesión poco frecuente. Los autores presentan un caso de luxación anterior de cadera en un niño de 4 años producida por traumatismo mínimo. La exploración realizada en urgencias mostró impotencia funcional para la deambulación y gran dolor. El seguimiento ha sido de 18 meses tras los cuales el paciente no presenta complicaciones. Exponen su experiencia en el caso y revisión de la bibliografía.Traumatic hip dislocation of the hip is rare in children. The authors report a case of anterior hip dislocation in a 4-year-old boy who received relatively minor trauma. He was unable to walk and was in severe pain when seen in emergency room. He was followed-up for 18 months and no complications have appeared. They report here their experience with one case and review the literature

Fissidentetum taxifolii Waldheim 1944 rhizomnietosum pandati subas. nova en el piso supramediterráneo de Sierra Nevada (Granada, España)

La asociación Fissidentetum taxifolii Waldheim 1944 rhizomnietosum punctati subas. nova, ha sido observada en taludes húmedos del piso supramediterráneo de Sierra Nevada. Aparece ligada al bioclima de formaciones boscosas de Quercus pyrenaica Willd., mostrando una posición finicola y relictica en el sur de Europa.L'association Fissidentetus taxifolii Waldheim 1944 rhizomnietosum punctati subas. nova, est observée a Sierra Nevada dans les talus humides de l'étage supraméditerranéen; elle est liée au bioclimat des formations forestiers du Quercus pyrenaica Willd., montrant une position finicole et rélictigue

Plant virus cell-to-cell movement is not dependent on the transmembrane disposition of its movement protein

The cell-to-cell transport of plant viruses depends on one or more virus-encoded movement proteins (MPs). Some MPs are integral membrane proteins that interact with the membrane of the endoplasmic reticulum, but a detailed understanding of the interaction between MPs and biological membranes has been lacking. The cell-to-cell movement of the Prunus necrotic ringspot virus (PNRSV) is facilitated by a single MP of the 30K superfamily. Here, using a myriad of biochemical and biophysical approaches, we show that the PNRSV MP contains only one hydrophobic region (HR) that interacts with the membrane interface, as opposed to being a transmembrane protein. We also show that a proline residue located in the middle of the HR constrains the structural conformation of this region at the membrane interface, and its replacement precludes virus movement

Generalized granuloma annulare after pneumococcal vaccination

Granuloma annulare may be caused by multiple triggers. Among these are vaccinations, which have been described as an infrequent cause of granuloma annulare. The authors report the first case of generalized granuloma annulare associated with pneumococcal vaccination in a 57-year-old woman, who presented cutaneous lesions 12 days after vaccination

Corporate social responsibility and workplace health promotion: A systematic review

The complex situation that global society is facing as a result of COVID-19 has highlighted the importance of companies committing to the principles of social responsibility. Among the internal initiatives, those related to the health of workers are, obviously, highly topical. The objective of our research is to provide concise knowledge of the relationship between workplace health promotion (WHP) and corporate social responsibility (CSR) so that the relevant specialized research was gathered in a single document that lays the foundations of its applicability. A systematic review, following the PRISMA method, has been carried out. Twenty-seven articles have been selected from the main scientific databases. Their qualitative analysis concludes that CSR and WHP are linked, have beneficial reciprocal effects, need committed leadership respectful of autonomy and voluntariness, and require the establishment of specific goals within the framework of the organizations' sustainability policies. Future studies should establish the impact of the pandemic on these aspects