#3
Si le das a Read full article, te cuenta bastante:
The solution is centred on a “smart surface” composed of hundreds of programmable metamaterial tiles.
When illuminated by synthetic aperture radar (SAR) imaging satellites such as China’s Gaofen-3 or Ludi Tance 1, these tiles silently manipulate reflected signals – switching between “on” (0° phase) and “off” (180° phase) states – to encode messages directly into the radar echoes received by the satellites.
A 1-bit programmable spatiotemporal encoding information metasurface. Image: Chinese Academy of Sciences
A 1-bit programmable spatiotemporal encoding information metasurface. Image: Chinese Academy of Sciences
Combat platforms in war-torn cities or on stormy seas could relay data day and night at 127 kilobits per second (kbps), matching the bandwidth of Nato’s Link 16 tactical data network without being detected.
Because they do not release any extra detectable energy into the environment, such platforms can blend into the natural electromagnetic background.
“This communication system operates by scattering and modulating received SAR echoes, eliminating the need for active electromagnetic wave transmission,” Liu and his colleagues wrote in the Chinese-language paper.
“This ensures communication concealment and security while significantly reducing detection risks.”
Further Reading
How Chinese plane radar tracks moving targets without breaking radio silence
China reveals potent tech powering high-orbit radar satellite wonder
Explainer | China is making rapid space tech gains. Here’s how the military could use them
ABeijing-based communications researcher, who was not involved in the project said: “In a way this indeed seems like telepathy, very different from existing communication methods. If validated, this could fundamentally reshape future battlefields.”
However, the researcher, who asked not to be named due to the sensitivity of the issue, added: “But any technology has weaknesses. New… » ver todo el comentario
ya les veo librándose de religión:
“El alma de Jonatán quedó ligada con la de David, y lo amó Jonatán como a sí mismo.”
“Tu amor fue para mí más maravilloso que el amor de las mujeres.” (2º libro de Samuel 1:26)
#25 la AEPD solo sanciona a las empresas (salvo que sean de la propia adminitración pública).
pero una vez con la sanción firme, puedes ir al tribunal y pedir la indemnización q corresponda.
#1 los q comemos de todo los evitamos por ello?
Al fin y al cabo, los dueños originales de la carne y demás q comemos se alimentan con productos similares, pero con menos regulación, por no estar destinados a consumo humano.
#15 Si un pensionista tiene otros ingresos, no son del trabajo, son rendimientos financieros.
Y aunque no en todas las comunidades se paga lo mismo, en general el tope de impuestos que pagas está en el 28%, y mientras cobres menos de 300.000€, solo pagas un 23%.
Quizá eso sea lo que haya q cambiar. Igualar los tramos impositivos de ambas modalidades.
No tiene sentido que se pague mucho más por el rendimiento del trabajo que por el rendimiento del no trabajo.
#4 En el caso de bomberos, ha habido mucha gente atrapada en ascensores, al volver la luz alarmas de incendio (probablemente falsas, pero se acude igualmente), y algo más tarde gente que necesitaba el ascensor para subir a casa y aún no funcionaba.
#1 A mi esto ya me parece una mezcla de doblepensar, de 1984, y los animales todos iguales, pero unos más iguales que otros de rebelión en la granja. Ambas de Orwell.
#21 esto q tú consideras chorradas, otros lo llaman ciencia, y no suele venir del lobby nuclear.
Se utilizan elementos radiactivos desde pararrayos y detectores de incendio hasta en medicina, para diagnosticar y curar.
#12 del enlace, primera línea:
La Comisión Europea define la brecha salarial de género como «la diferencia relativa en el ingreso bruto promedio de mujeres y hombres dentro de la economía en su conjunto».
Si le das a Read full article, te cuenta bastante:
The solution is centred on a “smart surface” composed of hundreds of programmable metamaterial tiles.
When illuminated by synthetic aperture radar (SAR) imaging satellites such as China’s Gaofen-3 or Ludi Tance 1, these tiles silently manipulate reflected signals – switching between “on” (0° phase) and “off” (180° phase) states – to encode messages directly into the radar echoes received by the satellites.
A 1-bit programmable spatiotemporal encoding information metasurface. Image: Chinese Academy of Sciences
A 1-bit programmable spatiotemporal encoding information metasurface. Image: Chinese Academy of Sciences
Combat platforms in war-torn cities or on stormy seas could relay data day and night at 127 kilobits per second (kbps), matching the bandwidth of Nato’s Link 16 tactical data network without being detected.
Because they do not release any extra detectable energy into the environment, such platforms can blend into the natural electromagnetic background.
“This communication system operates by scattering and modulating received SAR echoes, eliminating the need for active electromagnetic wave transmission,” Liu and his colleagues wrote in the Chinese-language paper.
“This ensures communication concealment and security while significantly reducing detection risks.”
Further Reading
How Chinese plane radar tracks moving targets without breaking radio silence
China reveals potent tech powering high-orbit radar satellite wonder
Explainer | China is making rapid space tech gains. Here’s how the military could use them
ABeijing-based communications researcher, who was not involved in the project said: “In a way this indeed seems like telepathy, very different from existing communication methods. If validated, this could fundamentally reshape future battlefields.”
However, the researcher, who asked not to be named due to the sensitivity of the issue, added: “But any technology has weaknesses. New… » ver todo el comentario