User profiles for A. Ossen

Arnfried Ossen

Director Quantitative Research
Verified email at ubs.com
Cited by 114

ESG as a performance factor for smart beta indexes

G Giese, A Ossen, S Bacon - The Journal of Index Investing, 2016 - search.proquest.com
Although traditional financial factors, such as value, growth, and momentum, have become
common practice in the construction of smart beta indexes, the question whether …

The metric structure of weight space

SM Rüger, A Ossen - Neural Processing Letters, 1997 - Springer
We describe symmetries of feedforward networks in terms of their corresponding groups,
which naturally act on and partition weight space. This leads to an algorithm that generates …

[PDF][PDF] Segmentation of medical images using neural-network classifiers

A Ossen, T Zamzow, H Oswald, E Fleck - Proceedings of the International …, 1994 - Citeseer
We demonstrate that neural-network classi ers are able to signi cantly enhance lowlevel
segmentation of medical images. Minimum-error-rate or Bayesian a posteriori probabilities of …

A review of energy characteristic of vertical greenery systems

T Safikhani, AM Abdullah, DR Ossen… - … and Sustainable Energy …, 2014 - Elsevier
Rapidly growing cities and human activities change the environment and are accompanied
by some drawbacks. Sustainable remedies are needed to protect the environment and the …

[PDF][PDF] An analysis of the metric structure of the weight space of feedforward networks and its application to time series modeling and prediction.

A Ossen, SM Rüger - ESANN, 1996 - Citeseer
We study symmetries of feedforward networks in terms of their corresponding groups. We
nd that these groups naturally act on and partition weight space into disjunct domains. We …

Clustering in weight space of feedforward nets

SM Rüger, A Ossen - International Conference on Artificial Neural …, 1996 - Springer
We study symmetries of feedforward networks in terms of their corresponding groups and
find that these groups naturally act on and partition weight space. We specify an algorithm to …

Street geometry factors influence urban microclimate in tropical coastal cities: A review

…, A Keyvanfar, HB Lamit, K Saito, DR Ossen - Environmental and …, 2016 - sciendo.com
Urban climatologists have moved smoothly towards urban geometry meso-scales as obstruction
between buildings, streets, and urban environment. Urban climatologists and designers …

Weight space analysis and forecast uncertainty

A Ossen, SM Rüger - Journal of Forecasting, 1998 - Wiley Online Library
The usage of location information of weight vectors can help to overcome deficiencies of
gradient‐based learning for neural networks. We study the non‐trivial structure of weight space, …

[PDF][PDF] Practical tools for derivative instruments based on nonlinear time series prediction

A Ossen, M Schnauss, B Berlin - Neural Network World, 1995 - Citeseer
Derivative instruments are financial engineering tools. They are linked to underlying financial
instruments and are often better suited to manage exposure to risk. A number of tools exist …

Noninvasive determination of endothelium-mediated vasodilation as a screening test for coronary artery disease: pilot study to assess the predictive value in …

S Schroeder, MD Enderle, R Ossen, C Meisner… - American heart …, 1999 - Elsevier
Background Peripheral endothelial dysfunction (ED) quantified by the determination of flow-mediated
dilation (FMD%) of the brachial artery with the use of high-resolution ultrasound is …