1 citations · 1 across the 2 of their papers we have counts for
3 papers
A brief introduction on latent variable based ordinal regression models with an application to survey data
Johannes Wieditz, Clemens Miller, Jan Scholand +1
The analysis of survey data is a frequently arising issue in clinical trials, particularly when capturing quantities which are difficult to measure. Typical examples are questionna…
Characteristic and Necessary Minutiae in Fingerprints
Johannes Wieditz, Yvo Pokern, Dominic Schuhmacher +1
Fingerprints feature a ridge pattern with moderately varying ridge frequency (RF), following an orientation field (OF), which usually features some singularities. Additionally at s…
An algorithm for computing Fréchet means on the sphere
Gabriele Eichfelder, Thomas Hotz, Johannes Wieditz
For most optimisation methods an essential assumption is the vector space structure of the feasible set. This condition is not fulfilled if we consider optimisation problems over t…