Search Everything

Tip: Search using "First Name + Last Name", e.g.
János Kiss instead of Kiss János.

Publications - 6374

Real network test of an iterative origin-destination matrix estimator in urban public transport

Richárd Horváth Balázs Horváth

Publication Name: 2014 18th International Conference on System Theory Control and Computing Icstcc 2014

Publication Date: 2014-12-11

Volume: Unknown

Issue: Unknown

Page Range: 715-719

Description:

The estimation of origin-destination matrices in urban public transport is an evergreen issue due to the fact that the key of the planning of public transport systems is the accurate prediction of the traffic load which requires a well-functioning assignment method and reliable passenger data (i.e. time-dependent OD matrix). This paper describes the theory of lately developed iterative estimation method and the first real network test results.

Open Access: Yes

DOI: 10.1109/ICSTCC.2014.6982502

Experimental modal analysis based TPA method of wiper system linkage vibration amplification

Zoltán Gazdagh L. L. Szabo M. Bubreg B. Fukker T. F. Varga

Publication Name: Proceedings of ISMA 2024 International Conference on Noise and Vibration Engineering and Usd 2024 International Conference on Uncertainty in Structural Dynamics

Publication Date: 2024-01-01

Volume: Unknown

Issue: Unknown

Page Range: 3557-3571

Description:

Acoustic transfer functions from mounting points of front wiper systems on vehicle body to driver ear positions can describe vehicle noise transfer properties. Component based TPA methods can be applied to characterize the wiper system as a noise source from the vehicle point of view. The same methods can be utilized to characterize the wiper drive as a noise source from the wiper linkage point of view. The paper presents a method to characterize the transfer properties of the linkage independent from the drive excitation. The linkage amplification method presented here provides force-force transfer functions from drive connection locations to the linkage and mounting point locations of the linkage to the vehicle body. The presented procedure focuses on TPA method within a vehicle component. Synthetized FRFs calculated at drive connection locations and at mounting points of the linkage at measured points of the modal model from experimental modal analysis are used for calculating the linkage amplification functions.

Open Access: Yes

DOI: DOI not available

Fuzzy and Kohonen SOM based classification of different 0D nanostructures

Márk Farkas Ákos Nemcsics Antal Ürmös Zoltán Farkas Tamás Sándor Laszlo T. Koczy

Publication Name: Sami 2017 IEEE 15th International Symposium on Applied Machine Intelligence and Informatics Proceedings

Publication Date: 2017-03-16

Volume: Unknown

Issue: Unknown

Page Range: 365-370

Description:

In this paper, the clustering of the GaAs-based droplet epitaxially grown self-assembled nanostructures was investigated by soft-computing methods. The properties and the operation of these devices, depend on the type, the shape, the size, and their distribution of these 0 dimensional nanostructures. Because of this, it is very important to know, how and what kind of nanostructures can form, at the given technological parameters. Our goal is the classification of these nanostructures, in order to support the research and the production of these devices. Our solution is based on the shape factor calculation of the given nanostructure. In this work, two possible classification methods of nanostructures were introduced as well. First, the classification potential of the Kohonen Self-Organizing Mapping (SOM) was investigated. Second, the fuzzy inference system based classification was studied. In this case, the shape factor was determined by geometrical sizes of the nanostructures. In this paper the clustering was introduced, which supports many kinds of technology as well.

Open Access: Yes

DOI: 10.1109/SAMI.2017.7880335

Cognitive infocommunications (CogInfoCom)

Adam Csapo Gyula Sallai Péter Baranyi

Publication Name: Cognitive Infocommunications Coginfocom

Publication Date: 2015-01-01

Volume: Unknown

Issue: Unknown

Page Range: 1-219

Description:

This book describes the theoretical foundations of cognitive infocommunications (CogInfoCom), and provides a survey on state-of-the-art solutions and applications within the field. The book covers aspects of cognitive infocommunications in research fields such as affective computing, BCI, future internet, HCI, HRI, sensory substitution, and virtual/augmented interactions, and also introduces newly proposed paradigms and initiatives under the field, including CogInfoCom channels, speechability and socio-cognitive ICT. The book focuses on describing the merging between humans and information and communications technology (ICT) at the level of cognitive capabilities with an approach towards developing future cognitive ICT.

Open Access: Yes

DOI: 10.1007/978-3-319-19608-4

Validation of the PCQ-5: A Short Form to Measure State Positive Psychological Capital

László Imre Komlósi Ted A. Paterson Lei Huang Tamás Martos Miklós Szerdahelyi

Publication Name: Group and Organization Management

Publication Date: 2024-02-01

Volume: 49

Issue: 1

Page Range: 215-245

Description:

Positive psychological capital (PsyCap) is a key measure of workplace positivity, yet its organizational impact may be somewhat limited by current measurement practices. Given its state-like and malleable nature, organizations need accurate yet brief measures to allow for repeated measurement of PsyCap. A very short PsyCap instrument could be used in various ways by organizations to measure and track employee positivity, thus enabling management to make decisions with more insight. Similarly, for researchers, a much shorter scale could dramatically improve research efficiency and response rate, opening up new perspectives in PsyCap research. In this paper, initial evidence is provided for the validity of a short PsyCap measure across multiple samples of working adult populations (N = 1331 in total) from four different countries (United States, China, Germany, and Hungary). Consistent with prior research, we propose a five-item PsyCap measure, the PCQ-5, consisting of one item from the dimensions of self-efficacy, resilience, and optimism and one item for each facet of the hope dimension (agency and pathways). The proposed PCQ-5 shows internal consistency reliability and good fit for a single factor global PsyCap model across all samples. Moreover, like the PCQ-24, the PCQ-5 is associated with meaningful workplace outcomes such as job performance, job satisfaction, OCBs, voice, and helping behaviors, and it is negatively related to deviant behaviors like CWBs.

Open Access: Yes

DOI: 10.1177/10596011221127383

Compression ignition linear engine design variable effects

Cs Tóth-Nagy Parviz Farmouri Nigel N. Clark

Publication Name: American Society of Mechanical Engineers Internal Combustion Engine Division Publication ICE

Publication Date: 2011-12-01

Volume: Unknown

Issue: Unknown

Page Range: 1029-1036

Description:

A linear engine/alternator was simulated and designed, and a prototype was built at West Virginia University. This paper describes the engine and presents original operational data. The linear engine was a two-cylinder, two-stroke, common rail direct injection, compression ignition engine. The engine was built using off the shelf components to reduce cost where it was possible. Engine control, injection duration and timing, were achieved using a microcontroller with piston position as a control input. Experiments on the engine were performed to study its behavior. The studied variables included mass of the translator, amount of fuel injected, injection timing, load, and stroke with operating frequency and mechanical efficiency as the basis of comparison. At this point of development, the engine was far from optimized; however, the trends in engine behavior were clear. Increasing the translator mass resulted in decreased operating frequency. Increasing the stroke length also resulted in decreased operating frequency. Overcharging and increased fueling rate, both, resulted in increased power output, efficiency, and operating frequency. Advancing injection timing resulted in increased frequency, efficiency and power output, and decreased stalling frequency. This suggests that the engine operated in an HCCI-like fashion. © 2011 by ASME.

Open Access: Yes

DOI: 10.1115/ICEF2011-60157

The Measurement of Indirect Effects in Project Appraisal

Mattias Juhász Tünde Vörös Koppány Krisztián

Publication Name: Transportation Research Procedia

Publication Date: 2016-01-01

Volume: 13

Issue: Unknown

Page Range: 114-123

Description:

Imperative for growth is dominating the present economic conditions also influencing decision-making to a large extent. Therefore, the analysis of economic impacts plays a more and more significant role in the selection of transport projects. However, ex-ante project appraisal is facing an increasing problem concerning the measurement of indirect economic effects. This paper aims to investigate the accurate way of quantifying such benefits via the analysis of theoretical issues, the review of existing approaches and a case study.

Open Access: Yes

DOI: 10.1016/j.trpro.2016.05.012

Historical origin of the fine structure constant: Part III: Pauli with Jung Retro-Cognizes St. Stephen's crowning achievement

Peter Varlaki Laszlo T. Koczy Imre J. Rudas

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2011-12-01

Volume: 8

Issue: 6

Page Range: 43-78

Description:

In Part II of the paper we discussed the central role of the number-archetype 137 in some great medieval works related to St Stephen's court. On the basis of the hermeneutical interpretation of certain of Pauli's famous dream series, we intend to show his hypothetical "synchronistic (unconscious) recognition" of the dominant representations and meanings of the medieval works discussed in the earlier parts of this paper, which can be related to his isomorphic mythological and "physical" dream patterns. We can also conclude that Pauli, collaborating with Jung, himself confirms in his consistent "dream-messages" the symbolic meaningful relationship and structural isomorphy between the basic quantum-physical model's features (e.g. the fine structure constant) and their hypothetical primordial images appearing even in the actual medieval works.

Open Access: Yes

DOI: DOI not available

Enhance of OEE by hybrid analysis at the automotive semi-automatic assembly lines

János Jósvai Péter Dobra

Publication Name: Procedia Manufacturing

Publication Date: 2020-01-01

Volume: 54

Issue: Unknown

Page Range: 184-190

Description:

Nowadays, industrial companies are constantly improving their processes and increasing their efficiency in order to achieve higher profits. One of the most common measures of efficiency at the semi-automatic assembly lines is the Overall Equipment Effectiveness (OEE) as a Key Performance Indicator (KPI). The goal of measurement of OEE is to improve the effectiveness of machines or production lines with minimal investments. The article presents a way to increase this indicator using an own hybrid analysis. Firstly, a literature review demonstrates scientific relevance. Secondly, a hybrid analysis is introduced for improving the efficiency. The effectiveness of the analysis is demonstrated by a practical example using data mining and line balancing, during which there was a 60% improvement in yield. Patterns recognitions by machine combined with human analysis provides this outstanding result. Hybrid analysis can be used not only on assembly lines, but also on individual machines where a lot of data is generated and the cycle time or takt time needs to be reduced for higher yields.

Open Access: Yes

DOI: 10.1016/j.promfg.2021.07.028