10 research outputs found
Classification of current instabilities during low-temperature breakdown in germanium
We present experimental investigations on the spatio-temporal nonlinear current flow in the post-breakdown regime of p-germanium at liquid-helium temperatures. The basic nonlinear effects are characterized in terms of the underlying semiconductor physics, taking into account the influence of different experimental parameters
Radio Pulsars
Almost 50 years after radio pulsars were discovered in 1967, our
understanding of these objects remains incomplete. On the one hand, within a
few years it became clear that neutron star rotation gives rise to the
extremely stable sequence of radio pulses, that the kinetic energy of rotation
provides the reservoir of energy, and that electromagnetic fields are the
braking mechanism. On the other hand, no consensus regarding the mechanism of
coherent radio emission or the conversion of electromagnetic energy to particle
energy yet exists. In this review, we report on three aspects of pulsar
structure that have seen recent progress: the self-consistent theory of the
magnetosphere of an oblique magnetic rotator; the location, geometry, and
optics of radio emission; and evolution of the angle between spin and magnetic
axes. These allow us to take the next step in understanding the physical nature
of the pulsar activity.Comment: Invited review for Space Science Review
Conserved cell types with divergent features in human versus mouse cortex
Neuro Imaging Researc
Recommended from our members
Long-term safety of spinal cord stimulation systems in a prospective, global registry of patients with chronic pain
Aim: The availability of long-term (>2 years) safety outcomes of spinal cord stimulation (SCS) remains limited. We evaluated safety in a global SCS registry for chronic pain. Methods: Participants were prospectively enrolled globally at 79 implanting centers and followed out to 3 years after device implantation. Results: Of 1881 participants enrolled, 1289 received a permanent SCS implant (1776 completed trial). The annualized rate of device explant was 3.5% (all causes), and 1.1% due to inadequate pain relief. Total incidence of device explantation >3 years was 7.6% (n = 98). Of these, 32 subjects (2.5%) indicated inadequate pain relief as cause for removal. Implant site infection (11 events) was the most common device-related serious adverse event (<1%). Conclusion: This prospective, global, real-world study demonstrates a high-level of safety for SCS with low rate of explant/serious adverse events. © 2023 The Authors.Open access articleThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at [email protected]