The formation of relativistic electron mirror produced via ioniza-tion of thin solid target by ultraintense femtosecond laser pulse is considered with the help of computer simulations. It is shown that the reflection of weak counter-propagating wave from such a mirror can produce the coherent radiation in x-ray and gamma-ray bands. The spectrum of up-conversed radiation is investigated.

The article focuses on scientific reflection. transcendental reflection does not analyse the content of knowledge, but reveals its conditions and is a condition research. This only thinking about thinking, also operations identifying distinguishing sensory data, rules for structuring universe. selection input data depends objective cognitive operations. Reflection possible ways transforming nat...

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The epiphrenic esophageal diverticulum is a rare non-malignant condition that commonly associated with motility disorders. It would normally be treated surgically, but the advancement of endoscopy techniques, peroral endoscopic myotomy septotomy (D-POEM) has shown its benefits in coping symptoms. We present case 71-year-old woman increasing symptoms dysphagia, weight loss and imaging data showi...