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Velocity correlations and spatial dependencies between neighbors in a unidirectional flow of pedestrians

Physical Review E 2017年第2期96卷 022307-022307页

作者： Jakub Porzycki Jarosław Wąs Leila Hedayatifar Forough Hassanibesheli Krzysztof Kułakowski Faculty of Electrical Engineering Automatics Computer Science and Biomedical Engineering AGH University of Science and Technology Aleja Mickiewicza 30 30-059 Kraków Poland Department of Physics Shahid Beheshti University GC Evin Tehran 19839 Iran Faculty of Physics and Applied Computer Science AGH University of Science and Technology Aleja Mickiewicza 30 30-059 Kraków Poland

The aim of the paper is an analysis of self-organization patterns observed in the unidirectional flow of pedestrians. On the basis of experimental data from Zhang et al. [J. Zhang et al., J. Stat. Mech. (2011) P06004], we analyze the mutual positions and velocity correlations between pedestrians when walking along a corridor. The angular and spatial dependencies of the mutual positions reveal a spatial structure that remains stable during the crowd motion. This structure differs depending on the value of n, for the consecutive nth-nearest-neighbor position set. The preferred position for the first-nearest neighbor is on the side of the pedestrian, while for further neighbors, this preference shifts to the axis of movement. The velocity correlations vary with the angle formed by the pair of neighboring pedestrians and the direction of motion and with the time delay between pedestrians' movements. The delay dependence of the correlations shows characteristic oscillations, produced by the velocity oscillations when striding; however, a filtering of the main frequency of individual striding out reduces the oscillations only partially. We conclude that pedestrians select their path directions so as to evade the necessity of continuously adjusting their speed to their neighbors'. They try to keep a given distance, but follow the person in front of them, as well as accepting and observing pedestrians on their sides. Additionally, we show an empirical example that illustrates the shape of a pedestrian's personal space during movement.

关键词： Patterns in complex systems Social systems

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Cognitive Keys in Personalized Cryptography

Cognitive Keys in Personalized Cryptography

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International Conference on Advanced Information Networking and Applications (AINA)

作者： Marek R. Ogiela Lidia Ogiela Faculty of Electrical Engineering Automatics Computer Science and Biomedical Engineering AGH University of Science and Technology Krakow Poland AGH University of Science and Technology Cryptography and Cognitive Informatics Research Group Krakow Poland

ISBN: (纸本)9781509060306

In this paper will be described a new way of using cognitive approaches in personalized cryptography algorithms. Personal information may be used in creation advanced security protocols, as well as personal keys for cryptosystems, and information encoding procedures. Such protocols may play important role in advanced secure management applications. Additionally some behavioral features allow to generate unique sequences, which also may be used in modern cryptographic application. Such possibilities will be described in this paper.

关键词： Cryptography Information systems Feature extraction Semantics Protocols Visualization

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Design and initial study of porous core electromagnet for levitation applications

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AIP Conference Proceedings 2018年第1期2029卷

作者： Adam Piłat Bartosz Sikora 1AGH University of Science and Technology Faculty of Electrical Engineering Automatics Computer Science and Biomedical Engineering Department of Automatic Control and Robotics Mickiewicza 30 30-059 Krakow Poland

A concept of the porous core electromagnet is studied. The form for the electromagnet core was printed using 3D technique. The core was manufactured manually using iron filings and cured in room temperature and air pressure. The aim of this paper is to deliver initial analysis of the proposed powder core together with the modelling procedure by the using finite element method, and to compare the experimental results of the manually manufactured electromagnet. The material property of the numerical model was adjusted to fit the experimental results. Finally, the electromagnet was tested in the levitation real–time experiment.

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Heat distribution in the deep drawing device components working by high temperatures

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IOP Conference Series: Materials Science and engineering 2018年第1期393卷

作者： M Tropp F Brumerčík J Šteininger P Weis A Glowacz Univerzity of Žilina Faculty of Mechanical Engineering Department of Design and Mechanical Elements Univerzitná 1 Žilina 010 26 Slovakia AGHUniversity of Science and Technology Faculty of Electrical Engineering Automatics Computer Science and Biomedical Engineering Department of Automatic Control and Robotics Al. A. Mickiewicza 30 30-059 Kraków Poland

The subject of the article is a simulation of heat affected components of a device for deep drawing by extreme conditions in vacuum by high temperatures required for forming of crystallization containers made from thin molybdenum sheets. The simulation is focused on the distribution of heat in particular components in relation with their shape. There are presented the design of working components and the boundary conditions of transient thermal simulations with the results.

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Basal Insulin Dose in Adults with Type 1 Diabetes Mellitus on Insulin Pumps in Real-Life Clinical Practice: A Single-Center Experience

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Advances in medicine 2018年第1期2018卷 1473160页

作者： Bartłomiej Matejko Aneta Kukułka Beata Kieć-Wilk Agnieszka Stąpór Tomasz Klupa Maciej T Malecki Department of Metabolic Diseases Jagiellonian University Medical College Kraków Poland. University Hospital Kraków Poland. Faculty of Electrical Engineering Automatics Computer Science and Biomedical Engineering AGH University of Science and Technology Kraków Poland.

INTRODUCTION:Basal insulin (BI) infusion in pump therapy of type 1 diabetes (T1DM) mimics physiological secretion during the night and between meals. The recommended percentage of the total BI to daily insulin dose (termed the %BI) ranges between 30 and 50%. We analyzed whether this recommendation was followed in adults with T1DM from a university center, and whether BI doses were linked with glycemic control. MATERIALS AND METHODS:We included 260 consecutive patients with T1DM (159 women and 101 men) treated with continuous subcutaneous insulin infusion at the Department of Metabolic Diseases, Krakow, Poland. Data were downloaded from patients' pumps and collected from medical records. We analyzed the settings of BI and the association of %BI with HbA1c level. Linear regression was performed. RESULTS:The mean age of T1DM individuals was 26.6 ± 8.2 years, BMI was 23.1 ± 3.0 kg/m, T1DM duration was 13.3 ± 6.4 years, and HbA1c level was 7.4%. There were 69.6% (=181) of T1DM patients with %BI in the recommended range. The T1DM duration and HbA1c level of patients with a %BI <30% (=23) was 9.5 years and 6.4%, respectively; for a %BI of 30-50%, it was 13.2 years and 7.4%; and for a %BI >50% (=56), it was 15.8 years and 7.8% ( < 0.001 for both three-group comparisons). Multiple regression identified %BI among independent predictors of the HbA1c level. CONCLUSION:In this real-life analysis, the recommendations concerning %BI dosing were not followed by almost one-third of adult T1DM patients. Low %BI was associated with better glycemic control; however, this requires further confirmation.

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Time-optimal control for reaction wheel pendulum

Time-optimal control for reaction wheel pendulum

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International Conference on Methods and Models in Automation and Robotics (MMAR)

作者： Maciej Rosół Adam Piłat Andrzej Tumau Faculty of Electrical Engineering Automatics AGH University of Science and Technology Institute of Automatics and Biomedical Engineering Faculty of Electrical Engineering Automatics Computer Science and Biomedical Engineering AGH University of Science and Technology

A control numerical algorithm solving the timeoptimal problem for the reaction wheel pendulum system, fully effective in the open loop, is examined in the real-time system. There are two control tasks. The first is to transfer the pendulum from the lower to the upper equilibrium point. The second is to transfer the pendulum from the upper to the lower equilibrium point. Both motions are accomplished in the minimal time. Simulated and realtime trajectories are compared. The time-optimal control strategy is concluded.

关键词： Wheels DC motors Switches Mathematical model Friction Electrical resistance measurement

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Application of hyperspectral imaging for analysis of embryonic development of lower vertebrates

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Journal of Physics: Conference Series 2019年第1期1421卷

作者： A B Burlakov S V Shirokov D D Khokhlov V I Kuzmin A F Gadzaov Department of ichthyology Faculty of Biology Moscow Lomonosov State University Leninskie Gory GSP-1 Moscow 119991 Russian Federation Laboratory of acousto-optic spectroscopy Scientific and Technological Center of Unique Instrumentation of Russian Academy of Sciences 15 Butlerova Moscow 117342 Russian Federation Department of Electrical Engineering and Introscopy Institute of Automatics and Computer Engineering National Research University 'Moscow Power Engineering University' 14 Krasnokazarmennaya street Moscow 111250 Russian Federation Department of Applied Mathematics Russian Technological University (MIREA) 78 Vernadskiy avenue Moscow 119454 Russian Federation Moscow Technological University 38a Leninskii avenue Moscow 119334 Russian Federation

The task of analyzing the characteristics of the embryonic development of lower vertebrates using non-invasive optical methods is considered. We propose to apply hyperspectral imaging for segmentation of embryo zones with different physical and chemical properties. This approach allows one to obtain information on the spatial distribution of optical spectral properties of the observed object. An experimental setup based on a microscope coupled with a spectral imaging add-on module utilizing a tunable acousto-optic filter has been created to implement this approach. Hyperspectral data arrays are formed as a series of spectral narrowband images obtained by successive tuning of the acousto-optic filter within the working spectral range. A series of experiments was conducted in which the development of embryos of the Misgurnus fossilis loach during their transition from the 32nd to the 33rd developmental stage was observed using the described experimental setup. Characteristic spatial regions corresponding to certain parts of the loach embryo were identified. The time dependences characterizing the change in the spectral properties of the selected regions were obtained. It is shown that joint processing of a series of spectral images obtained in different spectral bands within the working spectral range of an acousto-optical spectral imaging module allows one to effectively identify differences in the kinetics of the optical transmission spectral density for various regions of the axial mesoderm.

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Residual voltage analysis for the development of efficient stimulation methodology in integrated circuits

Residual voltage analysis for the development of efficient s...

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International Conference on Mixed Design of Integrated Circuits and Systems (MIXDES)

作者： Łukasz Kadłubowski Piotr Kmon Faculty of Electrical Engineering Automatics Computer Science and Biomedical Engineering Krakow Poland

This paper discusses fast artifact recovery-related issues regarding the parameters of microelectrode arrays in systems for simultaneous, multichannel stimulation and recording of neural cells. The results of area-independent parameterization of planar, circular, platinized microelectrodes are presented. Simulation results are described that show the influence of parameters of microelectrode and biphasic stimulus pulse on the residual voltage of the electrode, which is the main determinant of artifact's duration. The results are planned to be applied in the development of integrated circuit for fast transition between the phases of stimulation and recording.

关键词： Microelectrodes Mathematical model Resistance Impedance Capacitance Discharges (electric)

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Influence of fuel impurities on the consumption of electrodes in spark plugs 18

Influence of fuel impurities on the consumption of electrode...

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18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic engineering, ISEF 2017

作者： Rozowicz, Sebastian Tofil, Szymon Kielce University of Technology Department of Electrical Engineering Automatics and Computer Science al. Tysiaȩclecia Państwa Polskiego 7 Kielce Poland Kielce University of Technology Laser Processing Research Centre Division of Surface Engineering Faculty of Mechatronics and Mechanical Engineering al. Tysiaȩclecia Państwa Polskiego 7 Kielce Poland

ISBN: (纸本)9781538616611

The paper attempts to determine the impact of fuel impurities on the value of fuel energy spark discharge and the wear of spark plug electrode. Spark plugs were analyzed in two typical configurations of the ignition system. For the analyzed systems, a number of tests to determine the wear of spark plug electrode subjected to different types of impurities were conducted. The value of spark discharge energy for new and worn spark plugs was calculated. © 2017 IEEE.

关键词： Fuels

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Set-up of active magnetic bearings for control of flexible shaft

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AIP Conference Proceedings 2018年第1期2029卷

作者： Adam Piłat Bartosz Sikora Jan Klocek Jan Cieślik 1AGH University of Science and Technology Faculty of Electrical Engineering Automatics Computer Science and Biomedical Engineering Department of Automatic Control and Robotics Mickiewicza 30 30-059 Krakow Poland 2Optister Jalowcowa 50 31-329 Krakow Poland 3AGH University of Science and Technology Faculty of Mechanical Engineering and Robotics Department of Manufacturing Systems Mickiewicza 30 30-059 Krakow Poland

This paper presents the new laboratory test rig of the vertical axis flexible shaft supported by two active magnetic bearings. Behind the motivation of establishing this setup is the control of vibration modes of the flexible rotor - shaft assembly, while the rotational speed varies and the unbalanced mass on the whirling disc is introduced to the system. The proposed model is aimed to simulate real operation conditions of the rotating machinery with an applied external load, with a variable structure caused by a change of material properties of the rotor - shaft assembly, or due to a fault of some elements coupled with the rotor.

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