16 Result(s)

Chapter and Conference Paper

Calibrating a General Pedestrian Stream Simulation Model According to a Specific Real Life Scenario of a German Railway Station

Pedestrian stream simulations are used to mitigate risks for people in buildings and at public events. They allow gaining virtual experience for situations where it is impossible to gather real experience. At ...

M. Davidich, G. Köster in Pedestrian and Evacuation Dynamics 2012 (2014)

Chapter and Conference Paper

Bidirectional Coupling of Macroscopic and Microscopic Approaches for Pedestrian Behavior Prediction

We combine a macroscopic and a microscopic model of pedestrian dynamics with a bidirectional coupling technique to obtain realistic predictions for evacuation times. While the macroscopic model is derived from...

A. Kneidl, M. Thiemann, A. Borrmann, S. Ruzika… in Pedestrian and Evacuation Dynamics (2011)

Chapter and Conference Paper

A Sandwich Approach for Evacuation Time Bounds

In this article, we propose a novel modeling approach – the sandwich approach – to deal with evacuation time bounds (ETB) - in which lower and upper bounds for the evacuation time are calculated. A provable lo...

H.W. Hamacher, S. Heller, W. Klein, G. Köster… in Pedestrian and Evacuation Dynamics (2011)

Article

The Nottingham health profile–experiences after hip revision arthroplasty

Introduction:Considering patients after hip revision arthroplasty postoperative quality controls allows an evaluation of the individual implant situation as well as the achieved postoperative quality of life. Wit...

T. Ernstberger, G. Köster, T. Walde… in Archives of Orthopaedic and Trauma Surgery (2005)

Chapter

Der modulare Profemur®-Revisionsschaft

G. Köster in Modulare Revisionsendoprothetik des Hüftgelenks (2005)

Article

Chronic bacterial osteomyelitis: prospective comparison of ¹⁸F-FDG imaging with a dual-head coincidence camera and ¹¹¹In-labelled autologous leucocyte scintigraphy

Indium-111-labelled white blood cells (¹¹¹In-WBCs) are currently considered the tracer of choice in the diagnostic work-up of suspected active chronic osteomyelitis (COM). Previous studies in a limited number of...

J. Meller, G. Köster, T. Liersch, U. Siefker… in European Journal of Nuclear Medicine and M… (2002)

Article

Tissue response and osteoinduction of human bone grafts in vivo

Freeze-dried human bone allograft is used clinically as an adjunct to autologous bone graft. When freeze-dried human bone allograft is demineralized, the allograft is osteoinductive, since it causes bone to f...

C. H. Lohmann, D. Andreacchio, G. Köster… in Archives of Orthopaedic and Trauma Surgery (2001)

Article

Intracellular measurement of polyethylene particles

A histological and histomorphometric study was carried out on pseudo-capsules retrieved from patients during revision surgery of cementless total hip replacement. Polyethylene loading and areal polyethylene p...

M. von Knoch, G. Buchhorn, F. von Knoch… in Archives of Orthopaedic and Trauma Surgery (2001)

Article

Fractures of the distal radius. Changing therapeutic strategies

Fractures of the distal radius represent one of the most common fractures and do have high social-economic relevance. For treatement they need practicable classification and therapeutic standards. The demand f...

P. Wiemer, G. Köster, J. Felderhoff, U. Weber in Der Orthopäde (1999)

Article

Endoscopy of the femoral canal in revision arthroplasty of the hip

Femoral endoscopy using a special endoscope was performed in 28 revision arthroplasties with the aim of improving the operative technique and to analyze implant failure. Before clinical application, the metho...

G. Köster, H.-G. Willert, G. H. Buchhorn in Archives of Orthopaedic and Trauma Surgery (1999)

Article

Degradation of and intraosseous reactions to biodegradable poly-l-lactide screws: a study in minipigs

In 20 minipigs an osteotomy of the lumbar spine was done at L3 and fixed with resorbable implants (plate and screws) made of poly-l-lactide. For 24 months postoperatively the cancellous bone surrounding the scre...

M. Fuchs, G. Köster, T. Krause, H.-A. Merten… in Archives of Orthopaedic and Trauma Surgery (1998)

Article

Centralization of the femoral component in cemented hip arthroplasty using guided stem insertion

In order to improve the positioning of the stem within the femur, to centralize it within the cement and to achieve a complete and homogeneous cement mantle, a new hip endoprosthesis with guided stem insertio...

G. Köster, H.-G. Willert, T. Ernstberger… in Archives of Orthopaedic and Trauma Surgery (1998)

Article

Glial α₁-receptors probably inhibit the high-affinity uptake of noradrenaline into astrocytes in the rat brain in vivo

The effect of α₂-receptor blockage on the extraneuronal turnover of noradrenaline (NA) has been studied in the intact rat brain. Tropolone and yohimbine, along with reserpine or desmethylimipramine, were given 30...

G. Köster in Neurochemical Research (1995)

Chapter

The Cement-Fixed (CF) Hip Replacement System

One of the most important factors causing loosening and failure of cemented artificial hip joints is deterioration of the polymethylmethacrylate (PMMA) bone cement. The process of bone cement fragmentation dev...

H. G. Willert, G. Köster, H. P. Köhler in Endoprosthetics (1995)

Chapter

Das zementierte CF-Hüftendoprothesensystem

Die Haltbarkeit zementierter Hüftgelenkendoprothesen hängt in hohem Maße von der Zementiertechnik ab. Diese Erkenntnis ist ein Ergebnis der jahrzehntelangen Erfahrungen auf dem Gebiet des künstlichen Gelenkers...

H.-G. Willert, G. Köster, H.-P. Köhler in Endoprothetik (1995)

Article

Die Schädigung des Auges durch Atoxyl

A. Birch-Hirschfeld, G. Köster in Albrecht von Graefes Archiv für Ophthalmologie (1910)