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Tytuł:
Smartphone app with usage of AR technologies – SolAR System
Autorzy:
Shchur, G. O.
Shakhovska, N. B.
Powiązania:
https://bibliotekanauki.pl/articles/410668.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
augmented reality
tracker
Opis:
The article describes the AR mobile system for Sun system simulation. The main characteristics of AR systems architecture are given. The differences between tracking and without tracking technics are underlined. The architecture of the system of use of complemented reality for the study of astronomy is described. The features of the system and the principles of its work are determined.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2018, 7, 3; 63-68
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of the FARO laser tracker to the study of selected functional characteristics of a Kawasaki ZD130 industrial robot
Autorzy:
Ćwiąkała, P.
Cisińska, A.
Szotek, S.
Powiązania:
https://bibliotekanauki.pl/articles/114228.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
industrial robots
laser tracker
accuracy
precision
Opis:
The paper presents the test results of the following functional characteristics of a Kawasaki ZD130 industrial robot: the accuracy and repeatability of unidirectional positioning, the variance of multidirectional positioning and the accuracy and repeatability of distance. The influence of the speed of movement and load on the values of aforementioned functional characteristics was also examined. Measurements were made with the FARO Laser Tracker Vantage coordinate measuring machine. The research was conducted in accordance with the PN-EN ISO 9283:2003 standard.
Źródło:
Measurement Automation Monitoring; 2015, 61, 10; 475-479
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determining the degree of player engagement in a computer game with elements of a social campaign using cognitive neuroscience techniques
Autorzy:
Biercewicz, Konrad
Borawski, Mariusz
Borawska, Anna
Duda, Jarosław
Powiązania:
https://bibliotekanauki.pl/articles/38433179.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
EEG
Eye Tracker
engagement
IGA
advergaming
Opis:
Due to the popularity of video games in various applications, including both commercial and social marketing, there is a need to assess their content in terms of player satisfaction, already at the production stage. For this purpose, the indices used in EEG tests can be used. In this publication, a formula has been created based on the player's commitment to determining which elements in the game should be improved and for which graphic emblems connected with social campaigns were more memorable and whether this was related to commitment. The survey was conducted using a 2D platform game created in Unity based on observations of 28 recipients. To evaluate the elements occurring in the game at which we obtain a higher memory for graphic characters, a corresponding pattern was created based on player involvement. The optimal Index for moving and static objects and the Index for destruction were then selected based on the feedback. Referring to the issue of graphic emblems depicting social campaigns should be placed in a place where other activities such as fighting will not be distracted, everyone will be able to reach the level where the recently placed advertisement is. This study present the developed method to determine the degree of player's engagement in particular elements in the game using the EEG and to explore the relationship between the visibility of social advertising and engagement in a 2D platform game where the player has to collect three keys and defeat the ultimate opponent.
Źródło:
Applied Computer Science; 2022, 18, 4; 28-52
1895-3735
2353-6977
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of Influence of Sample Averaging on Accuracy of Point Coordinates Measurement Performed Using Laser Tracking Systems
Autorzy:
Gruza, Maciej
Gąska, Piotr
Gąska, Adam
Harmatys, Wiktor
Jedynak, Michał
Kobiela, Konrad
Powiązania:
https://bibliotekanauki.pl/articles/102134.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
Laser Tracker
measurement uncertainty
accuracy
niepewność pomiaru
dokładność
Opis:
Laser Tracking systems are commonly used in all branches of industry, which requires accurate large-scale measurements for instance aviation, space and shipbuilding industries. Laser Trackers belong to the group of non-Cartesian Coordinate Measuring Systems. Determination of the measured point coordinates involves the measurements of distance using laser beam and two angles recorded by horizontal and vertical encoders. Additionally, the environmental conditions are monitored and used for compensation of measured distance. The coordinates of single measured point are estimated using the results obtained from a series of samples taken in a short time period. The average value obtained from a sample is given as a result; additionally, the dispersion parameters are calculated which can be used to evaluate the probing process. This paper presents the research procedure which allows assessing the influence of chosen dispersion parameter related to the sample averaging on accuracy of the measurements performed with laser tracking devices. The procedure involves standard elements measurements during which the points with similar level of RMS parameter are used for the calculation of the measurement result. Such approach allows simulating the increasing dispersion of points taken into account during sample probing. The results presented in the article can be helpful to the operators of laser tracking systems to assess the influence of the probing process on the measurement accuracy.
Źródło:
Advances in Science and Technology. Research Journal; 2019, 13, 4; 94-99
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using eye tracking data for evaluation and improvement of training process on ship’s navigational bridge simulator
Autorzy:
Muczyński, B.
Gucma, M.
Bilewski, M.
Zalewski, P.
Powiązania:
https://bibliotekanauki.pl/articles/360367.pdf
Data publikacji:
2013
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
eye tracker
gaze data
statistical analysis
mental workload
Opis:
The paper presents basics of the eye tracking methodology and results of preliminary test on multi-purpose marine ship’s navigation bridge simulator. The use of the eye-tracker on the navigation bridge makes it possible to objectively measure the ergonomics of the individual interfaces, as well as to evaluate the decision-making process itself, including the mental workload and stress. In the experiment, officers were faced with an unexpected and sudden situation leading to a collision. The simulated situation required the officer to act immediately and resolutely, taking into account all his/her knowledge about the ship, and interpreting the available data correctly. Outcome of this test was compared with gaze data and it was proved that experienced group with best results suffered lowest level of mental workload and was most efficient In decision making process. Based on those results a possibility of improving simulator training with the use of eye tracking data is discussed.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 33 (105); 75-78
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rotation error modeling and identification for Robot kinematic calibration by circle point method
Autorzy:
Santolaria, J.
Conte, J.
Pueo, M.
Javierre, C.
Powiązania:
https://bibliotekanauki.pl/articles/221417.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
circle point
robot calibration
laser tracker
mathematical optimization
Opis:
Screw axis measurement methods obtain a precise identification of the physical reality of the industrial robots’ geometry. However, these methods are in a clear disadvantage compared to mathematical optimisation processes for kinematical parameters. That’s because mathematical processes obtain kinematical parameters which best reduce the robot errors, despite not necessarily representing the real geometry of the robot. This paper takes the next step at the identification of a robot’s movement from the identification of its real kinematical parameters for the later study of every articulation’s rotation. We then obtain a combination of real kinematic and dynamic parameters which describe the robot’s movement, improving its precision with a physical understanding of the errors.
Źródło:
Metrology and Measurement Systems; 2014, 21, 1; 85-98
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of external conditions and orientation of PV module on the energetic gain
Autorzy:
Frydrychowicz-Jastrzębska, G.
Bugała, A.
Powiązania:
https://bibliotekanauki.pl/articles/97742.pdf
Data publikacji:
2013
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
photovoltaic conversion
double-axis tracker
energetic gain
external conditions
Opis:
Paper presents the influence of external conditions such as: the latitude φ, the solar declination δ, the hour angle ω, number of sunny hours, cloud cover and orientation of photovoltaic module on the energetic gain. The results of the measurements of radiation power density that reaches the surface of the PV receiver for its different positions, for the geographic location of the cities of Poznań and Playa del Ingles and for different time periods (yearly and daily) are presented in a graphical form. The study compares also production of electric power and energy in different weather conditions: cloudy, partly cloudy and cloudless sky using two- axis tracking system and fixed with one optimal angle setting during the year. Analyzed systems are located in Poznan on the roof of the Faculty of Electrical Engineering building. Distribution of power density of solar radiation in different days of the year was also compared.
Źródło:
Computer Applications in Electrical Engineering; 2013, 11; 423-439
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modern Legal Ways in Regulating the Activities of Peer-To-Peer Networks, in the Context of Ensuring the Protection of Intellectual Rights
Autorzy:
Zhohov, Viktor
Powiązania:
https://bibliotekanauki.pl/articles/1931305.pdf
Data publikacji:
2020-03-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
Internet
torrent
tracker
file
web resource
computer
program
work
provider
Opis:
The issue of intellectual property protection on the global information network the Internet has recently become a matter of serious concern on the part of rights holders. Copyright, which arose with the invention of book printing in medieval Europe, was originally planned and understood as an institution of exclusive author’s monopoly on the production of material copies of works. In fact, it is in this context that the concept of copyright existed until the XXI century. On the eve of the new millennium, the emergence of an unprecedented phenomenon for its time - the World Wide Web, has significantly shaken traditional views on the concept of copyright and the limits of its regulation. The effectiveness of the copyright approach to the protection of the legitimate interests of right holders was questioned as early as 1845 by the American judge in the case of Emerson V. Davies. In his opinion, the exclusive rights to the results of creative activity are inadmissible, given that these results themselves are the result of thoughts, ideas, images that were created and repeatedly used by other people. Indeed, creativity is impossible without attracting or borrowing from the “intellectual treasury” of civilization. With the development of modern information technology, such borrowing has become available to anyone with an Internet connection. With the proliferation of computer programs that allow you to record music, create images, animation, creativity is no longer an elite activity available only to the select few.
Źródło:
Krakowskie Studia Małopolskie; 2020, 1(25); 21-36
1643-6911
Pojawia się w:
Krakowskie Studia Małopolskie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Semi-supervised learning with the clustering and Decision Trees classifier for the task of cognitive workload study
Częściowo nadzorowane uczenie z zastosowaniem klasteryzacji oraz klasyfikatora Drzew Decyzyjnych w przypadku badania obciążenia poznawczego
Autorzy:
Wawrzyk, Martyna
Powiązania:
https://bibliotekanauki.pl/articles/98500.pdf
Data publikacji:
2020
Wydawca:
Politechnika Lubelska. Instytut Informatyki
Tematy:
clustering
semi-supervised learning
eye tracker
klasteryzacja
uczenie częściowo nadzorowane
Opis:
The paper is focused on application of the clustering algorithm and Decision Tress classifier (DTs) as a semi-supervised method for the task of cognitive workload level classification. The analyzed data were collected during examination of Digit Symbol Substitution Test (DSST) with use of eye-tracker device. 26 participants took part in examination as vol-unteers. There were conducted three parts of DSST test with different levels of difficulty. As a results three versions were obtained of data: low, middle and high level of cognitive workload. The case study covered clustering of collected data by using k-means algorithm to detect three clusters or more. The obtained clusters were evaluated by three internal indices to measure the quality of clustering. The David-Boudin index detected the best results in case of four clusters. Based on this information it is possible to formulate the hypothesis of the existence of four clusters. The obtained clus-ters were adopted as classes in supervised learning and have been subjected to classification. The DTs was applied in classification. There were obtained the 0.85 mean accuracy for three-class classification and 0.73 mean accuracy for four-class classification.
Celem artykułu było zastosowanie klasteryzacji wraz z klasyfikatorem Drzew Decyzyjnych jako częściowo nadzoro-wanej metody klasyfikacji poziomu obciążenia poznawczego. Dane przeznaczone do analizy zostały zebrane podczas badania DSST (z ang. Digit Symbol Substitution Test) z użyciem urządzenia eye-tracker. 26 wolontariuszów wzięło udział w badaniu. Zostały przeprowadzone trzy części testu DSST o różnych poziomach trudności. W wyniku tego, otrzymano trzy wersje danych: z niskim, średnim i wysokim poziomem obciążenia poznawczego. Do analizy danych został użyty algorytm klasteryzacji k-means do wyznaczenia trzech lub większej liczby klastrów. Uzyskane klastry zostały poddane ocenie przy użyciu trzech wewnętrznych indeksów w celu zmierzenia jakości klasteryzacji. Indeks David-Boudin’a wykazał najlepsze rezultaty w przypadku istnienia czterech klastrów. Na podstawie tej informacji można sformułować hipotezę, iż dane są podzielone na 4 klastry, co oznaczałoby istnienie dodatkowego poziomu poznawczego. Uzyskane klastry zostały zaadoptowane jako klasy w uczeniu pod nadzorem. Do klasyfikacji danych został użyty klasyfikator Drzew Decyzyjnych . Otrzymano średnią dokładność równą 0.85 w przypadku 3-klasowej klasyfikacji oraz 0.73 średnią dokładność dla 4-klasowej klasyfikacji.
Źródło:
Journal of Computer Sciences Institute; 2020, 15; 214-218
2544-0764
Pojawia się w:
Journal of Computer Sciences Institute
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uncertainty evaluation of multilateration-based geometric error measurement considering the repeatibility of positioning of the machine tool
Autorzy:
Liu, Xingbao
Xia, Yangqiu
Rui, Xiaoting
Powiązania:
https://bibliotekanauki.pl/articles/2206791.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sequential-multilateration
laser tracker
machine tool
geometric error
measurement uncertainty
Opis:
The sequential multilateration principle is often adopted in geometric error measurement of CNC machine tools. To identify the geometric errors, a single laser tracker is placed at different positions to measure the length between the target point and the laser tracker. However, the measurement of each laser tracker position is not simultaneous and measurement accuracy is mainly subject to positioning repeatability of the machine tool. This paper attempts to evaluate the measurement uncertainty of geometric errors caused by the positioning repeatability of the machine tool and the laser tracker spatial length measurement error based on the Monte Carlo method. Firstly, a direct identification method for geometric errors of CNC machine tools based on geometric error evaluation constraints is introduced, combined with the geometric error model of a three-axis machine tool. Moreover, uncertainty contributors caused by the repeatability of positioning of numerically controlled axes of the machine tool and the laser length measurement error are analyzed. The measurement uncertainty of the geometric error and the volumetric positioning error is evaluated with the Monte Carlo method. Finally, geometric error measurement and verification experiments are conducted. The results show that the maximum volumetric positioning error of the machine tool is 84.1 μm and the expanded uncertainty is 5.8 μm ( = 2). The correctness of the geometric error measurement and uncertainty evaluation method proposed in this paper is verified compared with the direct geometric error measurement methods.
Źródło:
Metrology and Measurement Systems; 2023, 30, 1; 49--63
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and evaluation of a SteamVR tracker for training applications – simulations and measurements
Autorzy:
Maciejewski, Marcin
Piszczek, Marek
Pomianek, Mateusz
Pałka, Norbert
Powiązania:
https://bibliotekanauki.pl/articles/1849156.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
motion capture
SteamVR
accuracy
precision
tracker design
virtual shooting simulator
Opis:
Virtual reality (VR) has become a realistic alternative to conventional learning methods in numerous fields including military training. Accurate and precise tracking of a user wearing a head-mounted display is necessary to achieve an immersive VR experience. The widely available SteamVR system, where licensed users can design and construct trackers optimized for a given application can be an alternative to very expensive professional motion tracking. This paper presents the complete design process of a SteamVR tracker dedicated to a shooting simulation in a VR environment. We describe the optimization and simulation of the tracker’s shape and configuration of the sensors. In the simulation phase the developed model had better parameters than its commercial counterparts. Next, the optimized prototype was constructed and configured. The dedicated and automated measuring arrangement provided experimental verification of the tracker’s performance. Tracking performance as well as the accuracy and precision of both position and orientation measurements were determined and compared with simulations, which proved that the simulation software can accurately predict selected properties of the proposed tracker.
Źródło:
Metrology and Measurement Systems; 2020, 27, 4; 601-614
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative analysis of social media accessibility
Analiza porównawcza dostępności mediów społecznościowych
Autorzy:
Bocheński, Bartosz Henryk
Powiązania:
https://bibliotekanauki.pl/articles/24083649.pdf
Data publikacji:
2023
Wydawca:
Politechnika Lubelska. Instytut Informatyki
Tematy:
social media
eye tracker
WCAG 2.0
universal design
media społecznościowe
okulograf
projektowanie uniwersalne
Opis:
The paper assesses the accessibility compliance level of social media websites and their usability in terms of universal design. The study was performed on “reddit” and a social media website created by the author of the article for the express purpose of meeting the WCAG requirements as closely as possible, named “Twittn’t”. The analysis has been performed with the use of a survey study, an automated WAVE tool and an eye-tracker. The research groups consisted of fifteen and twenty people for survey and eye-tracker study respectively. The test results have shown strong correlation between usability of the social media website interface and number of its WCAG errors.
W artykule zbadano poziom dostępności mediów społecznościowych i ich funkcjonalność pod względem projektowania uniwersalnego. Badania zostały przeprowadzone na stronie „reddit” oraz medium społecznościowym stworzonym na potrzeby artykułu, spełniającym zalecenia WCAG w najwyższym możliwym stopniu, nazwanym „Twittn’t”.Analiza stron została przeprowadzona przy pomocą ankiety, automatycznego narzędzia WAVE oraz okulografu. Grupy badawcze zawierały 15 osób w przypadku ankiety oraz 20 w przypadku badania okulograficzengo.Wyniki badań wykazały silną korelację między użytecznością interfejsu mediów społecznościowych i liczbą błędów WCAG.
Źródło:
Journal of Computer Sciences Institute; 2023, 26; 23--28
2544-0764
Pojawia się w:
Journal of Computer Sciences Institute
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Servo tracking of targets at sea
Autorzy:
Ahmed, A.
Brdyś, M. A.
Powiązania:
https://bibliotekanauki.pl/articles/908404.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
śledzenie celu
urządzenie śledzące
filtr Kalmana
adaptacyjny układ sterowania
target tracking
tracker
Kalman filter
adaptive control
Opis:
This paper details a proposal for the position control system of a two-axis ship-mounted tracker. Aspects of the non-linear dynamics governing Line-Of-Sight (LOS) errors between the tracker and the target are presented. It is shown that the regulation of LOS errors can be achieved by introducing a feed-forward term based on the target’s velocity. This velocity is not measurable, and an estimator is required. Given that the tracking problem is non-linear, the classical separation principle does not hold, and cascading the estimator and regulator together may not lead to an optimal position control system. The ‘LQAdaptive’ system proposed here aims therefore to improve conformity to the separation principle. Simulation trials show that tracking is improved under the LQAdaptive system in comparison to a simple estimator-regulator structure.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2006, 16, 2; 197-207
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Differences in evaluation methods of trunk sway using different MoCap systems
Autorzy:
Kutilek, P.
Socha, V.
Cakrt, O.
Svoboda, Z.
Powiązania:
https://bibliotekanauki.pl/articles/306317.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
trunk
postural stability
camera system
orientation tracker
convex hull
confidence ellipse
pitch versus roll
tułów
stabilność
powłoka wypukła
Opis:
The position of the trunk can be negatively influenced by many diseases. Several methods can be used for identifying defects in balance and coordination as a result of pathology of the musculoskeletal or nervous system. The aim of this article is to examine the relationship between the three methods used for analysis of trunk sway and compare two fundamentally different MoCap systems. We used a camera system and a 3DOF orientation tracker placed on subject’s trunk, and measured inclination (roll) and flexion (pitch) during quiet stance. Ten healthy participants in the study were measured with eyes open and closed. The pitch versus roll plots of trunk were formed, and the area of the convex hull, area of confidence ellipse and total length of the trajectory of the pitch versus roll plot were calculated. The statistical analysis was performed and strong correlation between the area of the convex hull and area of the confidence ellipse was found. Also, the results show moderate correlation between the area of the confidence ellipse and total length of the trace, and moderate correlation between the area of the convex hull and total length of the trace. In general, the different MoCap systems show different areas and lengths but lead to the same conclusions. Statistical analysis of the participants with eyes open and eye closed did not show significant difference in the areas and total lengths of the pitch versus roll plots.
Źródło:
Acta of Bioengineering and Biomechanics; 2014, 16, 2; 85-94
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stochastic multivariable self-tuning tracker for non-Gaussian systems
Autorzy:
Filipovic, V.
Powiązania:
https://bibliotekanauki.pl/articles/908532.pdf
Data publikacji:
2005
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
model ARMAX
statystyka odpornościowa
stabilność globalna
ARMAX model
self-tuning tracker
non-Gaussian noise
robust statistics
global stability
optimality
Opis:
This paper considers the properties of a minimum variance self-tuning tracker for MIMO systems described by ARMAX models. It is assumed that the stochastic noise has a non-Gaussian distribution. Such an assumption introduces into a recursive algorithm a nonlinear transformation of the prediction error. The system under consideration is minimum phase with different dimensions for input and output vectors. In the paper the concept of Kronecker’s product is used, which allows us to represent unknown parameters in the form of vectors. For parameter estimation a stochastic approximation algorithm is employed. Using the concept of the stochastic Lyapunov function, global stability and optimality of the feedback system are established.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2005, 15, 3; 351-357
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł

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