Jan Rybář

Dr. Jan Rybář

Slovak university of technology in Bratislava, Faculty of mechanical engineering
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Academic Career Length

9Years (2018-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 June 2019 in Strojnícky časopis - Journal of Mechanical Engineering
Verified
Journal Article
Open access
PDF file
HBHučko Branislav
Hučko Branislav
FLFerková Sylvia Lea
Ferková Sylvia Lea
ĎSĎuriš Stanislav
Ďuriš Stanislav
JRJan Rybář
Jan Rybář
PPPavlásek Peter
Pavlásek Peter
The paper deals with the influence of various biomechanical parameters on the intraocular pressure (IOP). The IOP is a very important factor in more accurate diagnosis and better management of glaucoma. To get a more realistic value of IOP the measurement methodology must reflect the patient’s individual biometric and biomechanical parameters, for example age, sex, race, biomechanical properties of cornea, etc. Many measuring methods are based on the applanation of cornea during its loading by the measuring device - tonometers. These tonometers apply the Imbert – Fick law [1], which determines their size. This work also addresses the current approaches to creating more realistic IOP data.
17 December 2019
Verified
Book Chapter
Closed access
PDF file
BHBranislav Hučko
Branislav Hučko
ĽKĽuboš Kučera
Ľuboš Kučera
SĎStanislav Ďuriš
Stanislav Ďuriš
PPPeter Pavlásek
Peter Pavlásek
JRJan Rybář
Jan Rybář
JHJuraj Hodál
Juraj Hodál
4 October 2021 in Sensors
Verified
Journal Article
Open access
PDF file
PGPatrik Grosinger
Patrik Grosinger
JRJan Rybář
Jan Rybář
ŠDŠtefan Dunaj
Štefan Dunaj
SĎStanislav Ďuriš
Stanislav Ďuriš
BHBranislav Hučko
Branislav Hučko
Measuring the swing angle of a crane load is a relatively well-known but unsatisfactorily solved problem in technical practice. This measurement is necessary for the automatic stabilization of load swing without human intervention. This article describes a technically simple and new approach to solving this problem. The focus of this work is to determine the accuracy of the measuring device. The focus of this work remains on the design, the principle of operation of the equipment, and the determination of accuracy. The basic idea is to apply the strain gauge on an elastic, easily deformable component that is part of the device. One part of the elastic component is fixedly connected to the frame; the other part is connected to the crane rope by means of pulleys close to the rope. In this way, the bending of the elastic component in proportion to the swing angle of the payload is ensured.
5 March 2021 in Sensors
Verified
Journal Article
Open access
PDF file
Jan VachalekJan Vachalek
Jan Vachalek
Dana ŠišmišováDana Šišmišová
Dana Šišmišová
PVPavol Vasek
Pavol Vasek
JRJan Rybář
Jan Rybář
JSJuraj Slovák
Juraj Slovák
MŠMatej Šimovec
Matej Šimovec
The article deals with aspects of identifying industrial products in motion based on their color. An automated robotic workplace with a conveyor belt, robot and an industrial color sensor is created for this purpose. Measured data are processed in a database and then statistically evaluated in form of type A standard uncertainty and type B standard uncertainty, in order to obtain combined standard uncertainties results. Based on the acquired data, control charts of RGB color components for identified products are created. Influence of product speed on the measuring process identification and process stability is monitored. In case of identification uncertainty i.e., measured values are outside the limits of control charts, the K-nearest neighbor machine learning algorithm is used. This algorithm, based on the Euclidean distances to the classified value, estimates its most accurate iteration. This results into the comprehensive system for identification of product moving on conveyor belt, where based on the data collection and statistical analysis using machine learning, industry usage reliability is demonstrated.
29 October 2018 in AIP Conference Proceedings
Verified
Conference Paper
Closed access
PDF file
JRJan Rybář
Jan Rybář
MCMiroslav Chytil
Miroslav Chytil
SĎStanislav Ďuriš
Stanislav Ďuriš
BHBranislav Hučko
Branislav Hučko
FMFilip Maukš
Filip Maukš
PPPeter Pavlásek
Peter Pavlásek
The article deals with types of artificial corneal material designed for the eye model, which is designed to calibrate the optical tonometers. This article is focused on the comparison of suitable materials for artificial cornea, measurement and evaluation of the data on the selected contact and non-contact optical tonometers. It sets partial conclusions for the calibration of optical tonometers in ophthalmological practice from the point of view of the materials used.
22 July 2026 in Engineering Proceedings
Verified
Conference Paper
Open access
PDF file
GSGregor Starinský
Gregor Starinský
MHMartin Halaj
Martin Halaj
JRJan Rybář
Jan Rybář
POPeter Onderčo
Peter Onderčo
Technological progress in metrology provides new opportunities for enhancing the quality and transparency of metrological services, with the Digital Calibration Certificate (DCC) playing a significant role in this development. In contrast to traditional calibration certificates, the DCC enables the transfer of extended machine-readable data and can bring additional technical and metrological information describing the calibration process. This paper focuses on the use of DCC additional information for enhanced expression of calibration results in metrological practice and education. Using the example of pressure transducer calibration, the implementation of extended datasets within the DCC structure and their application in result evaluation are demonstrated, including analytical determination of measurement uncertainty and the application of the Monte Carlo method. The results confirm the contribution of DCC to more transparent interpretation of calibration results and to the support of professional education in metrology.