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001-es BibID:	BIBFORM109892
035-os BibID:	(cikkazonosító)3138 (WoS)000960105600001 (Scopus)85151210632
Első szerző:	Guzsvinecz Tibor (mérnök)
Cím:	Examining the Results of Virtual Reality-Based Egocentric Distance Estimation Tests Based on Immersion Level / Tibor Guzsvinecz, Erika Perge, Judit Szűcs
Dátum:	2023
ISSN:	1424-8220
Megjegyzések:	Depth perception as well as egocentric distance estimation can be trained in virtual spaces, although incorrect estimates can occur in these environments. To understand this phenomenon, a virtual environment with 11 changeable factors was created. Egocentric distance estimation skills of 239 participants were assessed with it in the range [25 cm, 160 cm]. One hundred fifty-seven people used a desktop display and seventy-two the Gear VR. According to the results, these investigated factors can have various effects combined with the two display devices on distance estimation and its time. Overall, desktop display users are more likely to accurately estimate or overestimate distances, and significant overestimations occur at 130 and 160 cm. With the Gear VR, distances in the range [40 cm, 130 cm] are significantly underestimated, while at 25 cm, they are significantly overestimated. Estimation times are significantly decreased with the Gear VR. When developing future virtual environments that require depth perception skills, developers should take these results into account.
Tárgyszavak:	Műszaki tudományok Informatikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk desktop display egocentric distance estimation depth perception Gear VR headmounted display human-computer interaction immersion virtual reality
Megjelenés:	Sensors. - 23 : 6 (2023), p.1-19. -
További szerzők:	Perge Erika (1972-) (informatikus) Szűcs Judit
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM118284
035-os BibID:	(cikkazonosító)6008304 (WoS)001097548900005 (Scopus)85174839332
Első szerző:	Pándy Árpád (szoftverfejlesztő rendszermérnök)
Cím:	Steering Angle Prediction From a Camera Image as a Backup Service / Pandy, Arpad; Kovacs, Laszlo; Kovacs, Adam; Hajdu, Andras
Dátum:	2023
ISSN:	2475-1472
Megjegyzések:	In this paper, we describe a method to predict the steering angle of the front wheels of a small-sized vehicle from a rear-view camera image. Our approach can be applied to give backup feedback for controlling units of autonomous vehicles or to detect anomalies in the running characteristics of the wheels. We determine how the emitted control (pulse-width modulation, PWM) signal correlates with the position of the wheel edges in the camera image. Thus, we can use the PWM values in a supervised learning scenario to train an appropriate convolutional neural network-based architecture to predict the steering angle. In our experiments, we found an approximately 95\% prediction accuracy for this task; we also made our data and source codes publicly available.
Tárgyszavak:	Műszaki tudományok Informatikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Autonomous Vehicles Vehicle Control Vision Sensors for Intelligent Vehicles Video/Image Processing Steering
Megjelenés:	IEEE Sensors Letters. - 7 : 11 (2023), p. 1-4. -
További szerzők:	Kovács László (1984-) (informatikus) Kovács Ádám Hajdu András (1973-) (matematikus, informatikus)
Pályázati támogatás:	OTKA-143540 OTKA TKP2020-NKA-04 Egyéb
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM103918
035-os BibID:	(cikkazonosító)7487 (WoS)000867266700001 (Scopus)85139888286
Első szerző:	Szodrai Ferenc (létesítménymérnök)
Cím:	Experimental and Numerical Assessment of Iso-Flux Cooling with Low Reynolds Pulsating Water Flow / Ferenc Szodrai
Dátum:	2022
ISSN:	1424-8220
Megjegyzések:	Almost every scale in thermal engineering requires performance optimization to lessen energy demand. The possibility of using pulsating flow for water cooling was investigated both experimentally and numerically. The experiments were conducted below a 60 mL?min?1 flow rate and frequencies of 3.3, 4, 5, 6.6, and 10 Hz. The flow rate and temperatures were monitored while the solenoid valve was actuated and cooled with thermoelectric coolers. The measurements were replicated by using commercially available software capable of doing large-eddy simulations with coupled thermal modelling. Thermal boundaries were created by using steady inflow temperature and iso-flux conditions. The experimental and numerical results were compared and evaluated. The results show that the Nusselt number of the examined pulsating flow was lower when compared to constant flow scenarios at the corresponding averaged flow rate.
Tárgyszavak:	Műszaki tudományok Gépészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk low Reynolds laminar pulsating solenoid thermal analysis iso-flux large-eddy simulation water flow
Megjelenés:	Sensors. - 22 : 19 (2022), p. 1-15. -
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