Las redes LI-FI: una nueva revolución en la telecomunicaciones - hitech

OledComm es una empresa parisina especializada en las redes Li-Fi, una tecnología de transmisión de datos a través de la luz. Euronews, el canal de noticias mas visto en Europa. Abónese a su dosis diaria de noticias internacionales, jerarquizadas y explicadas:http://eurone.ws/10ZDara Euronews está disponible en otros 12 idiomas:http://eurone.ws/12A8jmi Igual que el Wi-Fi funciona sin cables y solo requiere de lámparas LED convencionales. Cedric Mayer, director de OledComm nos hace una demostración: « Aquí tienen lo que llamamos un receptor Li-Fi, que va a leer informaciones y detectar los datos, para después transformarlos en música. Aquí vemos como funciona... lo pongo bajo la bombilla... ¡y ya está!" Con la tecnología Li-Fi se pueden transmitir archivos audiovisuales, imágenes de cámaras de vigilancia...todo llega a esta pantalla por medio de un haz de luz...¿Magia? Cedric Mayer, director de OledComm nos explica cómo funciona: "Apagamos y encendemos esta bombilla LED de alta frecuencia. Apagada corresponde a cero y encendida a uno. Así, enviamos ceros y unos a muy alta frecuencia. Podemos alcanzar un ancho de banda de hasta 3 Gigabits por segundo. ¡Todo un record!" Esto es una velocidad 150 veces superior al Wi-FI. La proxima etapa es internet. Con un módem clásico conectado a una bombilla LED bastaría para enviar información al ordenador vía un sensor fotosensible. Esta nueva tecnología no emite onda electromagnética, con lo cual sería posible acceder a la web sin riesgos en aviones y hospitales, cosa que aún no es posible mediante el Wi-FI. Las ventajas del Li-Fi son evidentes, sin embargo hay un pequeño inconveniente. El profesor, Jean-Yves Le Boudec de la Escuela Politécnica federal de Lausana en Suiza señala este pequeño detalle que puede ser un gran impedimento: « Los sistemas que comunican par ejemplo un Smartphone con una bombilla LED, deben colocarse en posición exacta para recibir el haz luminoso. Y eso representa una limitación insalvable para los sistemas móviles. » Varias empresas alemanas, japonesas, y norteamericanas trabajan en una aplicación web. Y esta empresa parisiense promete un producto comercializable a partir de 2014 por menos de 80 euros

Stability, Ambiguity and Change in the Discourses of NATO allies in the Black Sea region: The Cases of Romania, Bulgaria and Turkey

Shortly after the Crimea crisis of March 2014, NATO started a process of strategic reflection and a series of actions under the umbrella of the ‘Pivot to East’. On the South of its Eastern flank, the Black Sea region looms as one of the most unstable areas, with a number of frozen conflicts in non-NATO countries as well as an increasing unrest overall. This article explores the political discourses, commitments and attitudes towards NATO of the three allies at the Black Sea, namely Romania, Bulgaria and Turkey, as well as exploring their role in regional security. The purpose of the research is to compare NATO’s representation in the mainstream politics of these countries. Based on discourse analysis and the comparative method, the paper examines to what extent stability, ambiguity and change are present in the Southeast allies’ discourses on NATO

Explaining the European Union’s Changing Position towards the Gibraltar Question after the Brexit Referendum

Having previously remained impartial on the Gibraltar question between Spain and Britain since both were member states, the European Union suddenly changed its position after the Brexit referendum in favor of the Spanish government at the expense of breaching international law. In doing so, the European Union, for the first time, created a foreign policy on the long-standing Gibraltar question. This article explores the reasons behind the creation of this foreign policy in support of Spain. The European Union feared that the idea of Euroscepticism may escalate among remaining member states after the Brexit referendum because of wide-spread claims that it would dissolve in the near future, fuelled by far-right political parties. The European Union therefore created a foreign policy regarding Gibraltar in Spain’s favor in order to promote a “sense of community” for thwarting a further rise in Euroscepticism. While making its analysis, the article applies the assumption of social constructivism that ideas shape interests, which then determine the foreign policy choices of actors. DOI: 10.5901/mjss.2017.v8n4s1p2

Claiming credit and avoiding blame : political accountability in Greek and Turkish responses to the COVID‐19 crisis

Using a framework developed by Hood and adapting it to crises, we explore the factors behind the use of three types of political accountability strategies— presentational, pol-icy, and agency—during responses to the COVID-19 cri-sis in Greece and Turkey. We situate the comparison in the current political context and conclude with implications for political survival as leaders attempt to balance public ac-countability, political expediency, and national health