Uma apresentação em flash interessante sugerida pelo doutorando do Grupo de Materiais Fotônicos do IQ - UNESP, Araraquara: Robson Rosa da Silva.
(currículo lattes: http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4232516E8...
This is the first laser spectrum from the Chemistry and Camera (ChemCam) instrument on NASA's Curiosity rover, sent back from Mars on August 19, 2012. The plot shows emission lines from different elements present in the target, a rock near the rover's landing site dubbed "Coronation" .
ChemCam's detectors observe light in the ultraviolet (UV), violet, visible and near-infrared ranges using three spectrometers, covering wavelengths from 240 to 850 nanometers. The light is produced when ChemCam’s laser pulse strikes a target, generating ionized gases in the form of plasma, which is then analyzed by the spectrometers and their detectors for the presence of specific elements. The detectors can...
Natural structural color materials, especially those that can undergo reversible changes, are attracting increasing interest in a wide variety of research fields. Inspired by the natural creatures, many elaborately nanostructured photonic materials with variable structural colors were developed. These materials have found important applications in switches, display devices, sensors, and so on. In this critical review, we will provide up-to-date research concerning the natural and bio-inspired photonic materials with variable structural colors. After introducing the variable structural colors in natural creatures, we will focus on the studies of artificial variable structural color photonic...
NASA's Mars rover Curiosity has fired its laser for the first time on Mars. On Aug. 19th the mission's ChemCam instrument hit a fist-sized rock named "Coronation" with 30 pulses of its laser during a 10-second period. Each pulse delivers more than a million watts of power for about five one-billionths of a second.
The energy from the laser creates a puff of ionized, glowing plasma. ChemCam catches the light with a telescope and analyzes it with three spectrometers for information about what elements are in the rock. The spectrometers record 6,144 different wavelengths of ultraviolet, visible and infrared light.
"We got a great spectrum of Coronation -- lots of signal," said ChemCam Principal...
The upper blue-tinted image is an example of a thermal image that can be provided by a vehicle-based IR detection system. The image are samples of lenses made for low-cost far infrared detection systems made from chalcogenide glass by Fraunhofer IWM. Credit: Fraunhofer IWM.
If you watched the Olympics over the past few weeks, one of the recurring advertisements was for a luxury car (Cadillac or Lexus, I believe) that featured the car’s heads-up night vision system. I’ve always thought that night vision/thermal camera systems were a nifty idea—especially after experiencing some frighteningly foggy days—but, the truth is that such an option would not be extremely high on my list...
A alcunha foi dada pelo prestigiado físico Leon Lederman, vencedor do Prêmio Nobel em Física, pelo fato de o bóson de Higgs ser a partícula que permite que todas as outras tenham diferentes massas.
Ele fez uma analogia com a história bíblica da Torre de Babel, em que Deus, num de seus típicos acessos de fúria, faz com que todos falem línguas diferentes.
Da mesma maneira, o Higgs faria com que todas as partículas tivessem massas variadas.
O nome pegou, mas a maior parte da comunidade científica prefere chamar mesmo de bóson de Higgs, para que a brincadeira não distorça o real significado do trabalho de pesquisa ou atribua a ele alguma conotação religiosa imprópria.
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Câmeras marcianas: são nada menos do que 17 câmeras de curiosidade.
Este gráfico mostra as localizações das câmeras do robô Curiosity, da NASA, que chegou a Marte dia 6 de agosto.
O mastro do robô possui sete câmeras: o Micro Imageador Remoto, parte do conjunto chamado "Química e Câmera"; quatro câmeras de navegação em preto-e-branco (duas à esquerda e duas à direita) e duas câmeras coloridas principais no mastro, as chamadas Mastcams, que deverão fazer as melhores fotos.
A Mastcam esquerda tem uma lente de 34 milímetros, e a Mastcam direita tem uma lente de 100 milímetros.
Há nove câmaras fixas montadas no robô marciano: dois pares de câmeras preto-e-branco de navegação,...