Andersson-Madigan-Perlman chain graphs were originally introduced to represent independence models. They have recently been shown to be suitable for representing causal models with additive noise. In this paper, we present an algorithm for learning causal chain graphs. The algorithm builds on the ideas by Hoyer et al. (2009), i.e. it exploits the nonlinearities in the data to identify the direc...

The recommendations that follow have been updated from the proposals of a Technical Subcommittee set up by the International Union of Pharmacology Committee on Receptor Nomenclature and Drug Classification (Jenkinson DH, Barnard EA, Hoyer D, Humphrey PPA, Leff P, and Shankley NP (1995) International Union of Pharmacology Committee on Receptor Nomenclature and Drug Classification. IX. Recommenda...

Sparse non−negative matrix factorization (sNMF) allows for the decomposition of a given data set into a mixing matrix and a feature data set, which are both non−negative and fulfill certain sparsity conditions. In this paper it is shown that the employed projection step proposed by Hoyer has a unique solution, and that it indeed finds this solution. Then indeterminacies of the sNMF model are id...

Glomus tumors are relatively uncommon neoplasms arising from modified smooth muscle cells that are normally found in specialized arteriovenous shunts in acral sites, especially the fingertips. This distribution reflects their function because the arteriovenous anastomoses of these areas, also known as the SucquetHoyer canals, are involved in temperature regulation. Sucquet-Hoyer canals are line...

At the end of the XIX century and during the first half of the XX century, Henryk Hoyer and Zygmunt Grodzinski, two eminent Polish researchers, were carring out research on the lymphatic circulatory and blood circulatory systems. Later, these investigations were continued by their students and followers until 1966. Embryos from all groups of vertebrates were used for investigation and on that b...

Florian Herse, PhD; Babbette LaMarca, PhD; Carl A. Hubel, PhD; Tea Kaartokallio, MSc; A. Inkeri Lokki, MSc; Eeva Ekholm, MD, PhD; Hannele Laivuori, MD, PhD; Martin Gauster, PhD; Berthold Huppertz, PhD; Meryam Sugulle, MD; Michael J. Ryan, PhD; Sarah Novotny, MD; Justin Brewer, MD; Joon-Keun Park, PhD; Michael Kacik, MD; Joachim Hoyer, MD; Stefan Verlohren, MD; Gerd Wallukat, PhD; Michael Rothe,...

3 4 Thibault Viennet, Michael M. Wördehoff, Boran Uluca, Chetan Poojari, Hamed 5 Shaykhalishahi, Dieter Willbold, Birgit Strodel, Henrike Heise, Alexander K. Buell, 6 Wolfgang Hoyer, Manuel Etzkorn 7 8 Institute of Physical Biology, Heinrich-Heine-University Düsseldorf, Germany 9 Instititue of Complex Systems, Forschungszentrum Jülich, Germany 10 Department of Physics, Tampere University of Tec...