Publications by authors named "A Hassel"
Multiple thick film samples of the AgcPd1-c solid solution were prepared using physical vapour deposition over a borosilicate glass substrate. This synthesis technique allows continuous variation in stoichiometry, while the distribution of silver or palladium atoms retains the arrangement into an on-average periodic lattice with smoothly varying unit cell parameters. The alloy concentration and geometry were measured over a set of sample points, respectively, via energy-dispersive X-ray spectroscopy and via X-ray diffraction.
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- Researchers are developing a new method for detecting trace gases in the air using ionization energies, which can be miniaturized and fine-tuned.
- Traditional methods for identification rely on large equipment, like mass spectrometers, but this new approach uses electron impact ionization, generated via the photoelectric effect, for better sensitivity at a lower scale.
- The method achieves sensitivity levels of 1 ppm, comparable to classic photoionization detection (PID), and can identify substances with an accuracy of 30 meV, supported by quantum mechanical models.
A broad compositional range of Nb-Ti anodic memristors with volatile and self-rectifying behaviour was studied using a combinatorial screening approach. A Nb-Ti thin-film combinatorial library was co-deposited by sputtering, serving as the bottom electrode for the memristive devices. The library, with a compositional spread ranging between 22 and 64 at.
View Article and Find Full Text PDFObjective: The Oral Impact of Daily Performances (OIDP) is a dental patient-reported outcome measure (dPROM) for the estimation of oral health-related quality of life (OHRQoL) and takes the frequency as well as the severity of problems into account; however, it is not available in German language. The aim of this study was, therefore, to evaluate the reliability and validity of the German version of the OIDP in patients of a private practice.
Material And Methods: Translation of the original OIDP version was performed by a forward-backward process.
Statement Of Problem: Lighting conditions are an essential factor for accurately determining tooth color. However, the ideal lighting conditions for determining tooth shade are rarely met and are difficult to quantify. While the use of a standardized daylight lamp D55 can improve accuracy, its high cost limits its use in dental offices.
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