Dr. Ralph Simon

Dr. Ralph Simon

Lehrstuhl für Maschinelles Lernen und Datenanalytik
Department Artificial Intelligence in Biomedical Engineering (AIBE)

  1. Simon, R., Matt, F., Santillán, V., Tschapka, M., Tuttle, M., & Halfwerk, W. (2023). An ultrasound-absorbing inflorescence zone enhances echo-acoustic contrast of bat-pollinated cactus flowers. Journal of Experimental Biology, 226(5) | https://doi.org/10.1242/jeb.245263
  2. Simon, R., Varkevisser, J., Mendoza, E., Hochradel, K., Elsinga, R., Wiersma, P G., Middelburg, E., Zoeter, E., Scharff, C., Riebel, K., & Halfwerk, W. (2023). RoboFinch: A versatile audio-visual synchronised robotic bird model for laboratory and field research on songbirds. Methods in Ecology and Evolution, 00, 1–12 | https://doi.org/10.1111/2041-210X.14063
  3. Varkevisser, J. M., E. Mendoza, M., Simon, R., Manet, M., Halfwerk, W. H., Scharff, C. and Riebel, K. (2022). Multimodality during live tutoring is relevant for vocal learning in zebra finches. Animal Behavior, 187, 263-280 | https://doi.org/10.1016/j.anbehav.2022.03.013
  4. Rickert, D., Simon, R., von Fersen, L., Baumgartner, K., Bertsch, T., Kirschbaum, C., & Erhard, M. (2022). Saliva and Blood Cortisol Measurement in Bottlenose Dolphins (Tursiops truncatus): Methodology, Application, and Limitations. Animals, 12(1), 22. | https://www.mdpi.com/2076-2615/12/1/22
  5. Simon, R.*, Bakunowski, K.*, Reyes-Vasques, A. E., Tschapka, M., Knörnschild, M., Steckel, J., & Stowell, D. (2021). Acoustic traits of bat-pollinated flowers compared to flowers of other pollination syndromes and their echo-based classification using convolutional neural networks. PLoS Computational Biology, 17(12), e1009706. | https://doi.org/10.1371/journal.pcbi.1009706
  6. Verreycken, E., Simon, R., Quirk-Royal, B., Daems, W., Barber, J., & Steckel, J. (2021). Bio-acoustic tracking and localization using heterogeneous, scalable microphone arrays. Communications Biology, 4(1), 1-11. | https://www.nature.com/articles/s42003-021-02746-2
  7. Varkevisser, J. M.*, R. Simon*, E. Mendoza, M. How, I. van Hijlkema, R. Jin, Q. Liang, C. Scharff, W. H. Halfwerk, and K. Riebel. 2021. Adding colour-realistic video images to audio playbacks increases stimulus engagement but does not enhance vocal learning in zebra finches. Animal Cognition:1-26. | https://doi.org/10.1007/s10071-021-01547-8
  8. Hüttner, T.; Dollhaeupl, S.; Simon, R.; Baumgartner, K.; von Fersen, L. (2021). Activity Budget Comparisons Using Long-Term Observations of a Group of Bottlenose Dolphins (Tursiops truncatus) under Human Care: Implications for Animal Welfare. Animals, 11, 2107. | https://doi.org/10.3390/ani11072107
  9. Velilla, E., Polajnar, J., Virant-Doberlet, M., Commandeur, D., Simon, R., Cornelissen, J.H.C., Ellers, J. and Halfwerk, W. (2020) Variation in plant leaf traits affects transmission and detectability of herbivore vibrational cues. Ecology and Evolution, 10(21), 12277-12289. | https://doi.org/10.1002/ece3.6857
  10. Velilla, E., Muñoz, M., Quiroga, N., Symes, L., ter Hofstede, H.M., Page, R.A., Simon, R., Ellers, J. and Halfwerk, W., (2020) Gone with the wind: Is signal timing in a neotropical katydid an adaptive response to variation in wind-induced vibratory noise? Behavioral Ecology and Sociobiology, 74, pp.1-11. | https://doi.org/10.1007/s00265-020-02842-z
  11. Hernández-Montero, J.R., Reusch, C., Simon, R., Schöner, C.R. and Kerth, G., (2020) Free-ranging bats combine three different cognitive processes for roost localization. Oecologia, pp.1-10 | https://doi.org/10.1007/s00442-020-04634-8
  12. Simon, R., Rupitsch, S., Baumann, M., Wu, H., Peremans, H. and Steckel, J., (2020) Bioinspired sonar reflectors as guiding beacons for autonomous navigation. Proceedings of the National Academy of Sciences. | DOI: 10.1073/pnas.1909890117
  13. Geipel, I., Steckel, J., Tschapka, M., Vandererelst, D., Schnitzler, H. U., Kalko, E.K.V., Peremans, H., & Simon, R., (2019) Bats Actively Use Leaves as Specular Reflectors to Detect Acoustically Camouflaged Prey, Current Biology, 29(16), 2731-2736. | https://doi.org/10.1016/j.cub.2019.06.076
  14. Halfwerk, W., Varkevisser, J., Simon, R., Mendoza, E., Scharff, C., & Riebel, K. (2019) Toward Testing for Multimodal Perception of Mating Signals. Front. Ecol. Evol., 17 April 2019 | https://doi.org/10.3389/fevo.2019.00124
  15. Kroh, P., Simon, R., Rupitsch, S. J., (2019) Classification of Sonar Targets in Air: A Neural Network Approach. Sensors, 19. Jg., Nr. 5, S. 1176. | https://doi.org/10.3390/s19051176
  16. Schöner, M. G., Simon, R., & Schöner, C. R. (2016). Acoustic communication in plant–animal interactions. Current opinion in plant biology, 32, 88-95. | https://doi.org/10.1016/j.pbi.2016.06.011
  17. Übernickel, K., Simon, R., Kalko, E. K., & Tschapka, M. (2016). Sensory challenges for trawling bats: Finding transient prey on water surfaces. The Journal of the Acoustical Society of America, 139(4), 1914-1922. | https://doi.org/10.1121/1.4944756
  18. Schöner*, M. G., Schöner*, C. R., Simon*, R. , Grafe, T. U., Puechmaille, S. J., Ji, L. L., Kerth, G. (2015). Bats Are Acoustically Attracted to Mutualistic Carnivorous Plants. Current Biology 25 (14), p. 1911–1916. *Co-first author | https://doi.org/10.1016/j.cub.2015.05.054
  19. Simon, R., Knörnschild, M., Tschapka, M., Schneider, A., Passauer, N., Kalko, E. K. and von Helversen, O. (2014). Biosonar resolving power: Echo-acoustic perception of surface structures in the submillimeter range. Frontiers in Physiology 5. https://doi.org/10.3389/fphys.2014.00064
  20. Simon, R., Holderied, M. W., Koch, C. U. and von Helversen, O. (2011) Floral acoustics: conspicuous echoes of a dish-shaped leaf attract bat pollinators. Science 333 (6042), p.631 – 633 | DOI: 10.1126/science.1204210
  21. Kelm, D.H.; Simon, R., Kuhlow, R., Voigt, CC., Ristow, M., (2011) High activity enables life on a high sugar diet in nectar-feeding bats, Proceedings of the Royal Society B: Biological Sciences, 278(1724):3490-3496.
  22. Simon, R., Holderied, M. W. and von Helversen, O. (2006). Size discrimination of hollow hemispheres by echolocation in a nectar feeding bat. Journal of Experimental Biology 209:3599-3609.