Abstract In a failed supernova, partial ejection of the progenitor’s outer envelope can occur due to weakening core’s gravity by neutrino emission in protoneutron star phase. We consider when this ejecta sweeps up circumstellar material, analogous supernova remnants (SNRs). focus on explosions blue supergiants, and find that be bright soft X-rays. Due its emission, we sources Large Magellanic C...

background: blood donation safety is one of the basic goals of the organization of blood transfusion in the world. self-exclusion and failed options are additional screening tests to routine diagnostic tests which is performed to detect the transmitted infection through blood or blood products. the purpose of this study was to investigate the efficacy of these systems on the improvement of bloo...