Axel Schäfer

How accurate is pulse rate variability as an estimate of heart rate variability? A review on studies comparing photoplethysmographic technology with an electrocardiogram.

J. Vagedes, Axel Schäfer, 2013, International journal of cardiology.

Estimation of Breathing Rate from Respiratory Sinus Arrhythmia: Comparison of Various Methods

Axel Schäfer, K. Kratky, 2008, Annals of Biomedical Engineering.

The Effect of Colored Illumination on Heart Rate Variability

Axel Schäfer, K. Kratky, 2006, Complementary Medicine Research.

Method for the Investigation of Mold Filling in the Fiber Injection Molding Process Based on Image Processing

Sven Coutandin, Jürgen Fleischer, Axel Schäfer, 2019, Procedia CIRP.