Publications by authors named "T FREDERIKSEN"
Background: Atrial fibrillation (AF) and acute myocardial infarction (AMI) share risk factors and are bidirectionally associated. Several studies found higher risks of outcomes in individuals with both conditions. Whether the risks of outcomes differ according to temporal order of AF and AMI is unclear.
View Article and Find Full Text PDFObjective: Otoscopy is a key clinical examination used by multiple healthcare providers but training and testing of otoscopy skills remain largely uninvestigated. Simulator-based assessment of otoscopy skills exists, but evidence on its validity is scarce. In this study, we explored automated assessment and performance metrics of an otoscopy simulator through collection of validity evidence according to Messick's framework.
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- * Researchers found that a protected diradical variant can maintain its open-shell state on a gold substrate, showing specific interactions between its unpaired electrons and a unique nonplanar geometry.
- * Using scanning tunneling microscopy (STM), the team was able to observe and manipulate the magnetic states of these molecules, indicating that structural changes can affect their spin properties and suggesting future applications in spin-crossover materials.
Article Synopsis
- Individuals with both atrial fibrillation (AF) and myocardial infarction (MI) experience higher mortality rates compared to those with only one of the conditions, and the study explores how the order in which these conditions occur may affect mortality.
- The Framingham Heart Study data, spanning from 1960 onward, was analyzed with over 10,000 participants to determine the hazard ratios of developing AF and MI, revealing that having interim MI significantly increases the risk of new-onset AF, and vice versa.
- The findings indicate a strong bidirectional relationship between AF and MI, with those suffering from both conditions facing substantially greater mortality risks, irrespective of which condition appeared first.
Vibrational quanta of melamine and its tautomer are analyzed at the single-molecule level on Cu(100) with inelastic electron tunneling spectroscopy. The on-surface tautomerization gives rise to markedly different low-energy vibrational spectra of the isomers, as evidenced by a shift in mode energies and a variation in inelastic cross sections. Spatially resolved spectroscopy reveals the maximum signal strength on an orbital nodal plane, excluding resonant inelastic tunneling as the mechanism underlying the quantum excitations.
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