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Publications - 6374

On the control of a vehicle dynamics problem

Tihamér A. Kocsis Adrian Németh Zoltán Horváth

Publication Name: 2014 IEEE International Electric Vehicle Conference Ievc 2014

Publication Date: 2014-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

In this paper we present an approach to find the controlled invariant sets of a nonlinear dynamical system. Our method explores the state space and determines the set of those initial values where the system can be stabilized with a bounded control function. A continuous closed-loop feedback rule can also be obtained from this procedure. We illustrate the numerical results of our method on a problem describing the behaviour of actuators controlling the lateral dynamics of a vehicle.

Open Access: Yes

DOI: 10.1109/IEVC.2014.7056192

On the constant difference of Zagreb Indices

Marko Milošević Tamás Réti Dragan Stevanović

Publication Name: Match

Publication Date: 2012-12-01

Volume: 68

Issue: 1

Page Range: 157-168

Description:

Let Φ(z), z ∈ ℤ, be the set of all connected graphs whose difference of the second and the first Zagreb index is equal to z. We show that Φ(z) contains exactly one element, a star, for z < -2, while it is infinite for z ≥ -2. Moreover, all elements of Φ(-2) and Φ(-1) are trees, while Φ(0), besides trees, contains the cycles only Constructions of new elements of Φ(z) from the existing ones are based on the existence of vertices of degree two. We further show that the only elements of J z≤0Φ(z), which do not contain vertices of degree two, are stars and the molecular graphs of 2,3-dimethylbutane and 2,2,3-trimethylbutane.

Open Access: Yes

DOI: DOI not available

The number of independent elements in heat transmission matrices

Ádám Bácsi

Publication Name: International Journal of Thermal Sciences

Publication Date: 2019-04-01

Volume: 138

Issue: Unknown

Page Range: 496-503

Description:

Unsteady heat transfer processes between a heat source and the environment are completely described by the frequency-dependent heat transmission matrix within linear response theory. The 2×2 matrix characterizes the linear relation between the temperature and the heat transfer rate at the heat source and the environment sides of the system. In generic case, the heat transmission matrix has four independent complex entries. The number of independent elements may be reduced in the presence of certain properties or symmetries of the system. In the present paper, it is shown how the microscopic, governing equations influence whether the heat transmission matrix has a determinant of unity. A determinant fixed to one allows only three independent elements of the matrix. In the presence of a spatial symmetry under which the roles of the heat source and the environment are changed, the number of independent entries is reduced to two. The two independent elements may be formulated in terms of an effective thermal resistance and an effective heat capacity. In the case of a heat conducting wall, the effective values are independent of the frequency and equal to the static thermal resistance and heat capacity of the system. For generic symmetric systems, however, the effective thermal resistance and heat capacity may exhibit significant frequency dependence. The frequency dependence is numerically studied in the example of the heat conduction between two parallel pipes.

Open Access: Yes

DOI: 10.1016/j.ijthermalsci.2019.01.005

On possibilistic correlation coefficient and ratio for fuzzy numbers

No authors available

Publication Name: Recent Researches in Artificial Intelligence, Knowledge Engineering and Data Bases - 10th WSEAS International Conference on Artificial Intelligence, Knowledge Engineering and Data Bases, AIKED'11

Publication Date: 2011-06-17

Volume:

Issue:

Page Range: 263-268

Description:

In this paper we show some properties of possibilistic correlation coefficient and correlation ratio for marginal possibility distributions. We will show some examples for their computation from some joint possibility distributions.

Open Access: No

DOI: DOI not available

Applying IoT Sensors and Big Data to Improve Precision Crop Production: A Review

Tarek Alahmad A. Nyéki M. Neményi

Publication Name: Agronomy

Publication Date: 2023-10-01

Volume: 13

Issue: 10

Page Range: Unknown

Description:

The potential benefits of applying information and communication technology (ICT) in precision agriculture to enhance sustainable agricultural growth were discussed in this review article. The current technologies, such as the Internet of Things (IoT) and artificial intelligence (AI), as well as their applications, must be integrated into the agricultural sector to ensure long-term agricultural productivity. These technologies have the potential to improve global food security by reducing crop output gaps, decreasing food waste, and minimizing resource use inefficiencies. The importance of collecting and analyzing big data from multiple sources, particularly in situ and on-the-go sensors, is also highlighted as an important component of achieving predictive decision making capabilities in precision agriculture and forecasting yields using advanced yield prediction models developed through machine learning. Finally, we cover the replacement of wired-based, complicated systems in infield monitoring with wireless sensor networks (WSN), particularly in the agricultural sector, and emphasize the necessity of knowing the radio frequency (RF) contributing aspects that influence signal intensity, interference, system model, bandwidth, and transmission range when creating a successful Agricultural Internet of Thing Ag-IoT system. The relevance of communication protocols and interfaces for presenting agricultural data acquired from sensors in various formats is also emphasized in the paper, as is the function of 4G, 3G, and 5G technologies in IoT-based smart farming. Overall, these research sheds light on the significance of wireless sensor networks and big data in the future of precision crop production

Open Access: Yes

DOI: 10.3390/agronomy13102603

Water-Insoluble, Thermostable, Crosslinked Gelatin Matrix for Soft Tissue Implant Development

István Hornyák Ibolya Zsoldos Sara Cruciani Róbert Várdai B. Kocsis Renzo Pala Viktória Varga László Smeller

Publication Name: International Journal of Molecular Sciences

Publication Date: 2024-04-02

Volume: 25

Issue: 8

Page Range: Unknown

Description:

In this present study, the material science background of crosslinked gelatin (GEL) was investigated. The aim was to assess the optimal reaction parameters for the production of a water-insoluble crosslinked gelatin matrix suitable for heat sterilization. Matrices were subjected to enzymatic degradation assessments, and their ability to withstand heat sterilization was evaluated. The impact of different crosslinkers on matrix properties was analyzed. It was found that matrices crosslinked with butanediol diglycidyl ether (BDDE) and poly(ethylene glycol) diglycidyl ether (PEGDE) were resistant to enzymatic degradation and heat sterilization. Additionally, at 1 v/v % crosslinker concentration, the crosslinked weight was lower than the starting weight, suggesting simultaneous degradation and crosslinking. The crosslinked weight and swelling ratio were optimal in the case of the matrices that were crosslinked with 3% and 5% v/v BDDE and PEGDE. FTIR analysis confirmed crosslinking, and the reduction of free primary amino groups indicated effective crosslinking even at a 1% v/v crosslinker concentration. Moreover, stress–strain and compression characteristics of the 5% v/v BDDE crosslinked matrix were comparable to native gelatin. Based on material science measurements, the crosslinked matrices may be promising candidates for scaffold development, including properties such as resistance to enzymatic degradation and heat sterilization.

Open Access: Yes

DOI: 10.3390/ijms25084336

Jung - Kerényi - Pauli and the cognitive individuation Part II: Model reconstructions for cognitive individuation

Peter Varlaki Péter Baranyi

Publication Name: 5th IEEE International Conference on Cognitive Infocommunications Coginfocom 2014 Proceedings

Publication Date: 2014-01-23

Volume: Unknown

Issue: Unknown

Page Range: 637-646

Description:

In this part of the paper a more differentiated system structure and dynamic process can be discussed to Jung's cognitive 'individuation process' suggested by W. Pauli in a partly conscious and partly unconscious cooperation with Jung. Furthermore, it can be linked to the dynamic systems of the Proto-Kabbala's Sephiroth system and the approximation of the 'dynamic processes' of the Eleusinian Mysteries and similar mythologems described by Kerényi in a 'system-theoretical manner', taking into account the modern 'control paradigm', as well.

Open Access: Yes

DOI: 10.1109/CogInfoCom.2014.7020419

Review of geosynthetic-reinforced pile-supported (GRPS) embankments-parametric study and design methods

Rashad Alsirawan

Publication Name: Acta Technica Jaurinensis

Publication Date: 2021-02-24

Volume: 14

Issue: 1

Page Range: 36-59

Description:

Embankment construction on soft soil may result in excessive settlement, loss of bearing capacity, or sliding instability. However, geosynthetic-reinforced pile-supported (GRPS) embankments offer an effective technique to overcome the problems resulting from soft foundations soils. This paper presents a review of the most important parameters affecting the behaviour of GRPS embankments as well as design methods that estimate tensile forces in the geosynthetic layers and load efficiency. Results highlight the importance of using GRPS embankments, but also reveal the inconsistencies between design methods. Finally, general conclusions about the design and construction of GRPS systems are presented.

Open Access: Yes

DOI: 10.14513/actatechjaur.00566

SENIOR MANAGEMENT MINDSETS FOR CORPORATE SOCIAL RESPONSIBILITY

Loma Mashne Zoltán Baracskai

Publication Name: Management Croatia

Publication Date: 2024-01-01

Volume: 29

Issue: 1

Page Range: 1-17

Description:

Despite the large amount of factual data on senior management’s significant role in achieving corporate social responsibility (CSR), little effort has been devoted to shed light on the CSR decision-making process and the managerial mindsets that drive it. To fill this gap in CSR research, this study explores the CSR decision-making process and senior management mindsets regarding CSR, inductively prompted by the CSR literature and a qualitative study. This study offers a conceptual model of socially responsible decision-making based on the Doctus knowledge-based system. The model is empirically analyzed and verified through semi-structured interviews with CSR experts. Further, an inductive examination of the qualitative data using individual-level analysis revealed three different mindsets of senior management towards CSR: conformist, self-interested, and shareholder satisfaction/profit-driven mindsets.

Open Access: Yes

DOI: 10.30924/mjcmi.29.1.1