Gabor Horvath

Summary

Country: Hungary

Publications

  1. ncbi request reprint Looking into the water with oblique head tilting: revision of the aerial binocular imaging of underwater objects
    Gabor Horvath
    Biooptics Laboratory, Department of Biological Physics, Eotvos University, H 1117 Budapest, Pázmány sétány 1, Hungary
    J Opt Soc Am A Opt Image Sci Vis 20:1120-31. 2003
  2. doi request reprint Imaging polarimetry of the fogbow: polarization characteristics of white rainbows measured in the high Arctic
    Gabor Horvath
    Environmental Optics Laboratory, Department of Biological Physics, Physical Institute, Eotvos University, Budapest, Hungary
    Appl Opt 50:F64-71. 2011
  3. pmc Cavemen were better at depicting quadruped walking than modern artists: erroneous walking illustrations in the fine arts from prehistory to today
    Gabor Horvath
    Department of Biological Physics, Physical Institute, Eotvos University, Budapest, Hungary
    PLoS ONE 7:e49786. 2012
  4. pmc An unexpected advantage of whiteness in horses: the most horsefly-proof horse has a depolarizing white coat
    Gabor Horvath
    Department of Biological Physics, Physical Institute, Eotvos University, 1117 Budapest, Pázmány sétány 1, Hungary
    Proc Biol Sci 277:1643-50. 2010
  5. doi request reprint Ventral polarization vision in tabanids: horseflies and deerflies (Diptera: Tabanidae) are attracted to horizontally polarized light
    Gabor Horvath
    Biooptics Laboratory, Department of Biological Physics, Physical Institute, Eotvos University, Pázmány sétány 1, 1117, Budapest, Hungary
    Naturwissenschaften 95:1093-100. 2008
  6. doi request reprint Polarotaxis in non-biting midges: female chironomids are attracted to horizontally polarized light
    Gabor Horvath
    Environmental Optics Laboratory, Department of Biological Physics, Physical Institute, Eotvos University, H 1117 Budapest, Pázmány sétány 1, Hungary
    Physiol Behav 104:1010-5. 2011
  7. pmc On the trail of Vikings with polarized skylight: experimental study of the atmospheric optical prerequisites allowing polarimetric navigation by Viking seafarers
    Gabor Horvath
    Environmental Optics Laboratory, Department of Biological Physics, Physical Institute, Eotvos University, Pázmány sétány 1, Budapest 1117, Hungary
    Philos Trans R Soc Lond B Biol Sci 366:772-82. 2011
  8. ncbi request reprint Does reflection polarization by plants influence colour perception in insects? Polarimetric measurements applied to a polarization-sensitive model retina of Papilio butterflies
    Gabor Horvath
    Biooptics Laboratory, Department of Biological Physics, Eotvos University, H 1117 Budapest, Pázmány sétány 1, Hungary
    J Exp Biol 205:3281-98. 2002
  9. ncbi request reprint Why is it worth flying at dusk for aquatic insects? Polarotactic water detection is easiest at low solar elevations
    Balázs Bernáth
    Department of Biological Physics, Eotvos University, H 1117 Budapest, Pázmány sétány 1, Hungary
    J Exp Biol 207:755-65. 2004
  10. ncbi request reprint Imaging polarimetry of glass buildings: why do vertical glass surfaces attract polarotactic insects?
    Peter Malik
    Biooptics Laboratory, Department of Biological Physics, Physical Institute, Eotvos University, H 1117 Budapest, Pázmány sétány 1, Hungary
    Appl Opt 47:4361-74. 2008

Collaborators

Detail Information

Publications40

  1. ncbi request reprint Looking into the water with oblique head tilting: revision of the aerial binocular imaging of underwater objects
    Gabor Horvath
    Biooptics Laboratory, Department of Biological Physics, Eotvos University, H 1117 Budapest, Pázmány sétány 1, Hungary
    J Opt Soc Am A Opt Image Sci Vis 20:1120-31. 2003
    ....
  2. doi request reprint Imaging polarimetry of the fogbow: polarization characteristics of white rainbows measured in the high Arctic
    Gabor Horvath
    Environmental Optics Laboratory, Department of Biological Physics, Physical Institute, Eotvos University, Budapest, Hungary
    Appl Opt 50:F64-71. 2011
    ..This variability could be a consequence of the characteristics of the high Arctic with open waters within the ice shield resulting in the spatiotemporal change of the droplet size within the fog...
  3. pmc Cavemen were better at depicting quadruped walking than modern artists: erroneous walking illustrations in the fine arts from prehistory to today
    Gabor Horvath
    Department of Biological Physics, Physical Institute, Eotvos University, Budapest, Hungary
    PLoS ONE 7:e49786. 2012
    ..2%. All these differences were statistically significant. Thus, cavemen were more keenly aware of the slower motion of their prey animals and illustrated quadruped walking more precisely than later artists...
  4. pmc An unexpected advantage of whiteness in horses: the most horsefly-proof horse has a depolarizing white coat
    Gabor Horvath
    Department of Biological Physics, Physical Institute, Eotvos University, 1117 Budapest, Pázmány sétány 1, Hungary
    Proc Biol Sci 277:1643-50. 2010
    ....
  5. doi request reprint Ventral polarization vision in tabanids: horseflies and deerflies (Diptera: Tabanidae) are attracted to horizontally polarized light
    Gabor Horvath
    Biooptics Laboratory, Department of Biological Physics, Physical Institute, Eotvos University, Pázmány sétány 1, 1117, Budapest, Hungary
    Naturwissenschaften 95:1093-100. 2008
    ..The polarotaxis in tabanid flies makes it possible to develop new optically luring traps being more efficient than the existing ones based on the attraction of tabanids by the intensity and/or color of reflected light...
  6. doi request reprint Polarotaxis in non-biting midges: female chironomids are attracted to horizontally polarized light
    Gabor Horvath
    Environmental Optics Laboratory, Department of Biological Physics, Physical Institute, Eotvos University, H 1117 Budapest, Pázmány sétány 1, Hungary
    Physiol Behav 104:1010-5. 2011
    ..Our finding is important in the visual ecology of chironomids and useful in the design of traps for these insects...
  7. pmc On the trail of Vikings with polarized skylight: experimental study of the atmospheric optical prerequisites allowing polarimetric navigation by Viking seafarers
    Gabor Horvath
    Environmental Optics Laboratory, Department of Biological Physics, Physical Institute, Eotvos University, Pázmány sétány 1, Budapest 1117, Hungary
    Philos Trans R Soc Lond B Biol Sci 366:772-82. 2011
    ....
  8. ncbi request reprint Does reflection polarization by plants influence colour perception in insects? Polarimetric measurements applied to a polarization-sensitive model retina of Papilio butterflies
    Gabor Horvath
    Biooptics Laboratory, Department of Biological Physics, Eotvos University, H 1117 Budapest, Pázmány sétány 1, Hungary
    J Exp Biol 205:3281-98. 2002
    ....
  9. ncbi request reprint Why is it worth flying at dusk for aquatic insects? Polarotactic water detection is easiest at low solar elevations
    Balázs Bernáth
    Department of Biological Physics, Eotvos University, H 1117 Budapest, Pázmány sétány 1, Hungary
    J Exp Biol 207:755-65. 2004
    ..Air temperature at sunrise is generally low, so dusk is the optimal period for polarotactic aquatic insects to seek new habitats...
  10. ncbi request reprint Imaging polarimetry of glass buildings: why do vertical glass surfaces attract polarotactic insects?
    Peter Malik
    Biooptics Laboratory, Department of Biological Physics, Physical Institute, Eotvos University, H 1117 Budapest, Pázmány sétány 1, Hungary
    Appl Opt 47:4361-74. 2008
    ..Since vertical glass panes of buildings are abundant in the man-made optical environment, and polarotactic aquatic insects are spread worldwide, our results are of general interest in the visual and behavioral ecology of aquatic insects...
  11. ncbi request reprint Underwater binocular imaging of aerial objects versus the position of eyes relative to the flat water surface
    András Barta
    Biooptics Laboratory, Department of Biological Physics, Eotvos University, H 1117 Budapest, Pázmány sétány 1, Hungary
    J Opt Soc Am A Opt Image Sci Vis 20:2370-7. 2003
    ..It is demonstrated that the structure of the aerial binocular visual field of underwater observers distorted by refraction is more complex than has been thought previously...
  12. ncbi request reprint Why do highly polarizing black burnt-up stubble-fields not attract aquatic insects? An exception proving the rule
    György Kriska
    Group for Methodology of Biology Teaching, Eotvos University, H 1117 Budapest, Pázmány sétány 1, Hungary
    Vision Res 46:4382-6. 2006
    ..The latter two characteristics explain why burnt-up stubble-fields are unattractive to aquatic insects. These results may be important in the study of the wider environmental effects of post-harvest burning...
  13. doi request reprint Stripes disrupt odour attractiveness to biting horseflies: battle between ammonia, CO₂, and colour pattern for dominance in the sensory systems of host-seeking tabanids
    Miklós Blahó
    Environmental Optics Laboratory, Department of Biological Physics, Physical Institute, Eotvos University, Pázmány sétány 1, H 1117 Budapest, Hungary
    Physiol Behav 119:168-74. 2013
    ..This result demonstrates the visual protection of striped coat patterns against attacks from blood-sucking dipterans, such as horseflies, known to transmit lethal diseases to ungulates. ..
  14. doi request reprint A new tabanid trap applying a modified concept of the old flypaper: linearly polarising sticky black surfaces as an effective tool to catch polarotactic horseflies
    Adám Egri
    Environmental Optics Laboratory, Department of Biological Physics, Physical Institute, Eotvos University, Pázmány sétány 1, H 1117 Budapest, Hungary
    Int J Parasitol 43:555-63. 2013
    ..The horizontal part of the trap captures water-seeking male and female tabanids, while the vertical part catches host-seeking female tabanids...
  15. doi request reprint New kind of polarotaxis governed by degree of polarization: attraction of tabanid flies to differently polarizing host animals and water surfaces
    Adám Egri
    Environmental Optics Laboratory, Department of Biological Physics, Physical Institute, Eotvos University, Pázmány sétány 1, 1117, Budapest, Hungary
    Naturwissenschaften 99:407-16. 2012
    ..As a practical by-product of our studies, we explain the enigmatic attractiveness of shiny black spheres used in canopy traps to catch tabanids...
  16. ncbi request reprint Wall thickness of gas- and marrow-filled avian long bones: measurements on humeri, femora and tibiotarsi in crows (Corvus corone cornix) and magpies (Pica pica)
    Bence Suhai
    Department of Biological Physics, Eotvos University, H 1117 Budapest, Pázmány Péter sétány 1, Hungary
    J Biomech 39:2140-4. 2006
    ..The relative wall thickness W=1-K of the gas-filled avian humeri studied is much larger than the theoretical optimum W*=1-K*=0.07, and thus these bones are thicker-walled than the optimal gas-filled tubular bone with minimum mass...
  17. ncbi request reprint Polarizational colours could help polarization-dependent colour vision systems to discriminate between shiny and matt surfaces, but cannot unambiguously code surface orientation
    Ramón Hegedüs
    Biooptics Laboratory, Department of Biological Physics, Lorand Eotvos University, Pázmány Péter sétány 1, H 1117 Budapest, Hungary
    Vision Res 44:2337-48. 2004
    ..The physical and perceptional reasons for these findings are explained in detail. Our results and conclusions are of general importance for polarization-dependent colour vision systems...
  18. doi request reprint How can horseflies be captured by solar panels? A new concept of tabanid traps using light polarization and electricity produced by photovoltaics
    Miklós Blahó
    Environmental Optics Laboratory, Department of Biological Physics, Physical Institute, Eotvos University, H 1117 Budapest, Pázmány sétány 1, Hungary
    Vet Parasitol 189:353-65. 2012
    ..Using imaging polarimetry, we measured the reflection-polarization characteristics of the photovoltaic trap surface demonstrating the optical reason for the polarotactic attractiveness to horseflies...
  19. doi request reprint Polarotactic tabanids find striped patterns with brightness and/or polarization modulation least attractive: an advantage of zebra stripes
    Adám Egri
    Environmental Optics Laboratory, Department of Biological Physics, Physical Institute, Eotvos University, H 1117 Budapest, Pázmány sétány 1, Hungary
    J Exp Biol 215:736-45. 2012
    ..This work provides an experimentally supported explanation for the underlying mechanism leading to the selective advantage of a black-and-white striped coat pattern...
  20. doi request reprint No evidence for behavioral responses to circularly polarized light in four scarab beetle species with circularly polarizing exocuticle
    Miklós Blahó
    Environmental Optics Laboratory, Department of Biological Physics, Physical Institute, Eotvos University, H 1117 Budapest, Pázmány sétány 1, Hungary
    Physiol Behav 105:1067-75. 2012
    ..Our results finally solve a puzzle raised over one hundred years ago, when Michaelson discovered that scarab beetles reflect circularly polarized light...
  21. doi request reprint Reducing the maladaptive attractiveness of solar panels to polarotactic insects
    Gabor Horvath
    Environmental Optics Laboratory, Department of Biological Physics, Physical Institute, Eotvos University, H 1117 Budapest, Pázmány sétány 1, Hungary
    Conserv Biol 24:1644-53. 2010
    ..The design of solar panels and collectors and their placement relative to aquatic habitats will likely affect populations of aquatic insects that use polarized light as a behavioral cue...
  22. ncbi request reprint Why is it advantageous for animals to detect celestial polarization in the ultraviolet? Skylight polarization under clouds and canopies is strongest in the UV
    András Barta
    Biooptics Laboratory, Department of Biological Physics, Eotvos University, Pázmány Péter sétány 1, Budapest H 1117, Hungary
    J Theor Biol 226:429-37. 2004
    ..Nevertheless, we present here one possible atmospheric optical reason why certain visual systems involved in detecting celestial polarization, are specifically tuned to the UV part of the spectrum...
  23. ncbi request reprint Psychophysical study of the visual sun location in pictures of cloudy and twilight skies inspired by Viking navigation
    András Barta
    Biooptics Laboratory, Department of Biological Physics, Lorand Eotvos University, H 1117 Budapest, Pázmány Péter sétény 1, Hungary
    J Opt Soc Am A Opt Image Sci Vis 22:1023-34. 2005
    ..Our results, however, do not bear on the polarimetric theory itself...
  24. pmc Spottier targets are less attractive to tabanid flies: on the tabanid-repellency of spotty fur patterns
    Miklós Blahó
    Environmental Optics Laboratory, Department of Biological Physics, Physical Institute, Eotvos University, Budapest, Hungary
    PLoS ONE 7:e41138. 2012
    ..This could be one of the possible evolutionary benefits that explains why spotty coat patterns are so widespread in mammals, especially in ungulates, many species of which are tabanid hosts...
  25. ncbi request reprint Spatiotemporal change of sky polarization during the total solar eclipse on 29 March 2006 in Turkey: polarization patterns of the eclipsed sky observed by full-sky imaging polarimetry
    Brigitta Sipocz
    Department of Biological Physics, Biooptics Laboratory, Physical Institute, Eotvos University, H 1117 Budapest, Pázmány sétány 1, Hungary
    Appl Opt 47:H1-10. 2008
    ..Practically the same characteristics of celestial polarization were encountered during both eclipses. This shows that the observed polarization phenomena of the eclipsed sky may be general...
  26. pmc Why do red and dark-coloured cars lure aquatic insects? The attraction of water insects to car paintwork explained by reflection-polarization signals
    György Kriska
    Group for Methodology in Biology Teaching, Lorand Eotvos University, 1117 Budapest, Pázmány Péter sétány 1, Hungary
    Proc Biol Sci 273:1667-71. 2006
    ..Consequently, yellow and white cars are unattractive to polarotactic water insects. The visual deception of aquatic insects by cars can be explained solely by the reflection-polarizational characteristics of the car paintwork...
  27. ncbi request reprint Imaging polarimetry of the circularly polarizing cuticle of scarab beetles (Coleoptera: Rutelidae, Cetoniidae)
    Ramón Hegedüs
    Biooptics Laboratory, Department of Biological Physics, Physical Institute, Faculty of Natural Sciences, Eotvos University, H 1117 Budapest, Pázmány sétány 1, Hungary
    Vision Res 46:2786-97. 2006
    ..We found the wavelength- and species-dependent circular polarization patterns in scarabs to be of a rather complex nature. These patterns are worthy of further studies...
  28. ncbi request reprint Why do dusk-active cockchafers detect polarization in the green? The polarization vision in Melolontha melolontha is tuned to the high polarized intensity of downwelling light under canopies during sunset
    Ramón Hegedüs
    Biooptics Laboratory, Department of Biological Physics, Lorand Eotvos University, H 1117 Budapest, Pázmány Péter sétány 1, Hungary
    J Theor Biol 238:230-44. 2006
    ..We also briefly discuss how green-sensitive polarization detectors can function efficiently enough during the pre-feeding and egg-laying flights of cockchafers, which always occur prior to sunset and under the sky...
  29. ncbi request reprint Degrees of polarization of reflected light eliciting polarotaxis in dragonflies (Odonata), mayflies (Ephemeroptera) and tabanid flies (Tabanidae)
    György Kriska
    Group for Methodology in Biology Teaching, Biological Institute, Eotvos University, Budapest, Hungary
    J Insect Physiol 55:1167-73. 2009
    ..Tabanids: Tabanus bovinus, Tabanus tergestinus (32%< or =p*< or =55%), Tabanus maculicornis (55%< or =p*< or =92%)...
  30. doi request reprint Glass buildings on river banks as "polarized light traps" for mass-swarming polarotactic caddis flies
    György Kriska
    Group for Methodology in Biology Teaching, Biological Institute, Eotvos University, Budapest, Pázmány sétány 1, Hungary
    Naturwissenschaften 95:461-7. 2008
    ....
  31. ncbi request reprint Testing the biomechanical optimality of the wall thickness of limb bones in the red fox (Vulpes vulpes)
    Balázs Bernáth
    Department of Biological Physics, Eotvos University, Pázmány Péter sétány 1, H 1117 Budapest, Hungary
    J Biomech 37:1561-72. 2004
    ..Assuming Q = 0.50 or 0.44, the relative mass increments mu of the investigated fox bones are smaller than 5% under all four mechanical conditions. The evolutionary relevance of such tiny mu-values is questionable...
  32. ncbi request reprint Influence of environmental factors on shot put and hammer throw range
    Ferenc Mizera
    Department of Biological Physics, Eotvos University, Pázmány sétány 1, H 1117, Budapest, Hungary
    J Biomech 35:785-96. 2002
    ..Our numerical calculations contribute to the comprehensive understanding and tabulation of these effects, which is largely lacking today...
  33. ncbi request reprint Positive polarotaxis in a mayfly that never leaves the water surface: polarotactic water detection in Palingenia longicauda (Ephemeroptera)
    György Kriska
    Group for Methodology in Biology Teaching, Biological Institute, Lorand Eotvos University, Pázmány sétány 1, Budapest, 1117, Hungary
    Naturwissenschaften 94:148-54. 2007
    ..The polarotactic behaviour of Tisza mayflies explains the earlier observation that these insects swarm above wet asphalt roads running next to river Tisza...
  34. ncbi request reprint Anomalous celestial polarization caused by forest fire smoke: why do some insects become visually disoriented under smoky skies?
    Ramón Hegedüs
    Biooptics Laboratory, Department of Biological Physics, Physical Institute, Lorand Eotvos University, Hungary
    Appl Opt 46:2717-26. 2007
    ....
  35. doi request reprint Optics of sunlit water drops on leaves: conditions under which sunburn is possible
    Adám Egri
    Department of Biological Physics, Physical Institute, Eotvos University, Budapest, Hungary
    New Phytol 185:979-87. 2010
    ....
  36. doi request reprint Polarotaxis in egg-laying yellow fever mosquitoes Aedes (Stegomyia) aegypti is masked due to infochemicals
    Balázs Bernáth
    Faculty of Engineering and Sciences, Jacobs University Bremen, Campus Ring 6, D 28759 Bremen, Germany
    J Insect Physiol 58:1000-6. 2012
    ..Ae. aegypti is the first known water-associated insect in which polarotaxis exists, but does not play a dominant role in locating water bodies and can be constrained in the presence of chemical cues...
  37. ncbi request reprint Polarization of 'water-skies' above arctic open waters: how polynyas in the ice-cover can be visually detected from a distance
    Ramón Hegedüs
    Department of Biological Physics, Physical Institute, Lorand Eotvos University, Budapest, Hungary
    J Opt Soc Am A Opt Image Sci Vis 24:132-8. 2007
    ..However, the threshold of polarization-based detection would be rather low, because the degree of linear polarization of light radiated by water-skies and ice-skies is not higher than 10%...
  38. pmc First report of adult Hyalomma marginatum rufipes (vector of Crimean-Congo haemorrhagic fever virus) on cattle under a continental climate in Hungary
    Sándor Hornok
    Department of Parasitology and Zoology, Faculty of Veterinary Science, Szent Istvan University, Budapest, Hungary
    Parasit Vectors 5:170. 2012
    ..South Hungary is being monitored for the northward spreading of thermophilic ixodid species, therefore ticks were collected from cattle and wild ruminants (red, fallow and roe deer) in the autumn of 2011...
  39. doi request reprint Possible optical functions of the central core in lenses of trilobite eyes: spherically corrected monofocality or bifocality
    Adám Egri
    Environmental Optics Laboratory, Department of Biological Physics, Physical Institute, Eotvos University, Budapest, Hungary
    J Opt Soc Am A Opt Image Sci Vis 29:1965-76. 2012
    ..Finally, trifocality of the lenses can be considered only as a theoretical option, but by no means an optically optimally functioning possibility...
  40. ncbi request reprint Chemo-radiotherapy in locally advanced squamous cell oesophageal cancer--are upper third tumours more responsive?
    Andras Papp
    Department of Surgery, Medical Faculty, University of Pecs, Hungary, Ifjusag u 13, Pecs, H 7624, Hungary
    Pathol Oncol Res 16:193-200. 2010
    ..It seems that upper third oesophageal cancer has superior sensitivity to multimodal treatment therefore our results may support that upper third location is not an unfavorable prognostic factor any more...