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1

A point process approach for spatial stochastic modeling of thunderstorm cells

Kriesche B., Hess R., Schmidt V.

Probability and Mathematical Statistics

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2017

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Vol. 37, Fasc. 2

471--496

EN

In this paper we consider two different approaches for spatial stochastic modeling of thunderstorms. Thunderstorm cells are represented using germ-grain models from stochastic geometry, which are based on Cox or doubly-stochastic cluster processes. We present methods for the operational fitting of model parameters based on available point probabilities and thunderstorm records of past periods. Furthermore, we derive formulas for the computation of point and area probabilities according to the proposed germ-grain models. We also introduce a conditional simulation algorithm in order to increase the model’s ability to precisely predict thunderstorm events. A systematic comparison of area probabilities, which are estimated from the proposed models, and thunderstorm records conclude the paper.

2

Optimization of culture conditions of osteoblast-like cells on PLGA scaffolds

Wojak I., Hintze V., Hess R., Scharnweber D. S., Pamuła E.

Engineering of Biomaterials

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2010

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Vol. 13, no. 96-98

144--145

3

In vitro evaluation of poly(L-lactide-co-glycolide) membrane

Krok M., Hess R., Wojak I., Kościelniak D., Scharnweber D., Pamuła E.

Engineering of Biomaterials

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2010

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Vol. 13, no. 94

7--10

EN

The aim of this study was to prepare and evaluate the properties of a new membrane dedicated for the treatment of bone defects in periodontology according to guided tissue regeneration (GTR) technique. The first part of this study was to prepare the membrane from resorbable poly(L-lactide-co-glycolide) (PLGA) and verify its microstructure. Biological evaluation was lead using the cells interesting from the point of view of GTR, e.g. human fibroblasts and mesenchymal stem cells (hMSC). It was found that the obtained membrane has asymmetric microstructure and defined pore size. Cell culture experiments show that the membrane is biocompatible with fibroblasts and hMSC. Both types of cell proliferated well on the membrane. HMSC cultured on the membrane exhibited better osteogenic differentiation and higher mineralization as compared to control tissue culture polystyrene.