A Hybrid Magneto-Optic Capacitive Memory with Picosecond Writing Time

The long-term future of information storage requires the use of sustainable nanomaterials in architectures operating at high frequencies. Interfaces can play a key role in this pursuit via emergent functionalities that break out from conventional operation methods. Here, spin-filtering effects and photocurrents are combined at metal-molecular-oxide junctions in a hybrid magneto-capacitive memory. Light exposure of metal-fullerene-metal oxide devices results in spin-polarized charge trapping and the formation of a magnetic interface. Because the magnetism is generated by a photocurrent, the writing time is determined by exciton formation and splitting, electron hopping, and spin-dependent trapping. Transient absorption spectroscopy measurements show changes in the electronic states as a function of the magnetic history of the device within picoseconds of the optical pumping. The stored information is read using time-resolved scanning magneto optic Kerr effect measurements during microwave irradiation. The emergence of a magnetic interface in the picosecond timescale opens new paths of research to design hybrid magneto-optic structures operating at high frequencies for sensing, computing, and information storage

Trauma-related pneumopericardium: A literature review

Trauma-related pneumopericardium (TRPP) is the collection of air in the pericardial space secondary to trauma, potentially leading to tension pneumopericardium (TPP) in which the entrapment of air generates sufficient pressure to compromise cardiac output leading to a life-threatening cardiac tamponade and circulatory failure. We aim to classify the diagnostic and therapeutic approaches of TRPP and the causes of the subsequent development of TPP. A computer-based search of all published reports on TRPP in the medical literature from database inception to March 2020, on MEDLINE, Ovid, and Scopus; analyzing the data regarding initial status at presentation, extent of injuries, diagnostic and treatment measures with the intention to have an understanding of the clinical behavior and management outcomes of TRPP. The search identified 84 published case reports of 105 patients with TRPP. In conclusion, TRPP leading to TPP is described in the literature as a condition that involves a young male who is subjected to blunt trauma, most commonly in a motor vehicle collision, presenting as a polytrauma patient in a state of shock and low systolic blood pressure, or possibly in cardiac arrest. In addition, he might have a tracheobronchial injury with or without pneumothorax or pneumomediastinum and might require mechanical ventilation