Search in Publications

Found 6423 publications

3D webspace VS 2D website

Daniel Kiss Peter Baranyi

Publication Name: 11th IEEE International Conference on Cognitive Infocommunications Coginfocom 2020 Proceedings

Publication Date: 2020-09-23

Volume: Unknown

Issue: Unknown

Page Range: 515-516

Description:

The live demonstration will show two examples of 3D Webspaces. It will be demonstrated that 3D Websapces are considerable more effective in communication comparing to 2D Websites.

Open Access: Yes

DOI: 10.1109/CogInfoCom50765.2020.9237898

Linear Quadratic Robust Control of Synchronous Reluctance Motor †

Zoltan Nemeth Dávid Gábor Bányai

Publication Name: Engineering Proceedings

Publication Date: 2024-01-01

Volume: 79

Issue: 1

Page Range: Unknown

Description:

Synchronous reluctance motors (SynRMs) play a key role in modern vehicles as they do not require permanent magnets and sliding brushes, reducing maintenance requirements and increasing reliability. My research focused on the development of robust torque control for SynRM. In the simulations, I compared the linear quadratic (LQ) controller with the conventional proportional–integral (PI) controller. To apply the LQ control method, I converted the nonlinear motor model into a linear one. We expect the results of this research to show that the LQ controller provides faster and more robust performance than the PI controller. LQ control can provide faster response times and a more stable operation, which are particularly important under dynamic vehicle operating conditions. Although LQ control is more computationally intensive and takes longer to fine tune, the results show that it results in a better and more stable control system. Such benefits are significant in dynamic vehicle operating conditions where fast and reliable torque control is essential. Overall, it can be concluded that advanced control techniques such as LQ can contribute to increasing the efficiency and performance of synchronous reluctance motors in the automotive industry, thus contributing to the development of sustainable and reliable vehicles.

Open Access: Yes

DOI: 10.3390/engproc2024079003

Spatial Variability of Soil Properties and Its Effect on Maize Yields within Field—A Case Study in Hungary

Bálint Daróczy C. Kerepesi A. J. Kovács A. Nyéki M. Neményi

Publication Name: Agronomy

Publication Date: 2022-02-01

Volume: 12

Issue: 2

Page Range: Unknown

Description:

To better understand the potential of soils, understanding how soil properties vary over time and in-field is essential to optimize the cultivation and site-specific technologies in crop pro-duction. This article aimed at determining the within-field mapping of soil chemical and physical properties, vegetation index, and yield of maize in 2002, 2006, 2010, 2013, and 2017, respectively. The objectives of this five-year field study were: (i) to assess the spatial and temporal variability of attributes related to the maize yield; and (ii) to analyse the temporal stability of management zones. The experiment was carried out in a 15.3 ha research field in Hungary. The soil measurements in-cluded sand, silt, clay content (%), pH, phosphorous (P2O5), potassium (K2O), and zinc (Zn) in the topsoil (30 cm). The apparent soil electrical conductivity was measured in two layers (0–30 cm and 30–90 cm, mS/m) in 2010, in 2013, and in 2017. The soil properties and maize yields were evaluated in 62 management zones, covering the whole research area. The properties were characterized as the spatial-temporal variability of these parameters and crop yields. Classic statistics and geostatis-tics were used to analyze the results. The maize yields were significantly positively correlated (r = 0.62–0.73) with the apparent electrical conductivity (Veris_N3, Veris_N4) in 2013 and 2017, and with clay content (r = 0.56–0.81) in 2002, 2013, and 2017.

Open Access: Yes

DOI: 10.3390/agronomy12020395

Trend Environmental Implications in Pet Food Industry: Focusing on Sustainability Issues

Veronika Keller Balázs Répási

Publication Name: Chemical Engineering Transactions

Publication Date: 2024-01-01

Volume: 114

Issue: Unknown

Page Range: 727-732

Description:

In recent years, many of the 150 pet food companies currently producing pet food in Europe have started to focus on the ethical and local sourcing of raw materials, but there is still a lack of optimisation of the production processes and sustainable sourcing of raw materials. The aim of this research is to describe the steps already taken by pet food manufacturers towards sustainability and to analyse future plans and objectives of the industry in relation to food overproduction and unnecessary waste. The Delphi method was used with a team of experts from two major international European pet food companies to gain insights to identify current aspects and also where we can see room for development. The research shows that there is a huge potential in recycled human food waste used as pet food raw material, while there are currently efforts on packaging and more effective energy consumption. Moving to insect-based pet food could be an even better approach to increase the level of sustainability. The pet food market is becoming increasingly important as a result of economic development and modern social standards, and it is particularly important to pay attention to these aspects related to the production of pet food even more.

Open Access: Yes

DOI: 10.3303/CET24114122

Joint experiments on small tokamaks: Edge plasma studies on CASTOR

E. Dufkova J. Brotankova M. Berta R. Dejarnac A. Fonseca A. Talebitaher J. Sentkerestiova B. Tál J. Horacek J. Ferrera A. Ossyannikov M. Sokholov I. Ďuran A. Singh H. Hegazy H. Hegazy E. Del Bosco A. Malaquias M. Hron G. Mank M. Gryaznevich G. Van Oost Y. Kuznetsov P. Peleman S. Zoletnik V. Weinzettl J. Stöckel

Publication Name: Nuclear Fusion

Publication Date: 2007-12-01

Volume: 47

Issue: 5

Page Range: 378-386

Description:

The 1st Joint (Host Laboratory) Experiment on 'joint research using small tokamaks' was carried out using the IPP Prague experimental facility 'CASTOR tokamak'. The main experimental programme was aimed at characterizing the edge plasma in a tokamak by using different advanced diagnostic techniques. It is widely recognized that characterization of phenomena occurring at the plasma edge is essential for understanding the plasma confinement in a tokamak. The edge plasma in small and large scale experiments has many similar features, and the results obtained through detailed measurements in a small flexible device such as CASTOR are in many aspects still relevant to those in large tokamaks. Therefore, it is expected that the results of this joint experiment will have general validity. The radial and poloidal structure of electrostatic turbulence was characterized. The effects of edge biasing were analysed. Radiation fluctuations and profile measurements were performed using fast bolometry. Plasma position measurements were performed using novel Hall sensors. © 2007 IAEA, Vienna.

Open Access: Yes

DOI: 10.1088/0029-5515/47/5/002

Multi-threaded Bacterial Iterated Greedy heuristics for the Permutation Flow Shop Problem

Krisztián Balázs Laszlo T. Koczy Zoltán Horváth

Publication Name: Cinti 2012 13th IEEE International Symposium on Computational Intelligence and Informatics Proceedings

Publication Date: 2012-12-01

Volume: Unknown

Issue: Unknown

Page Range: 63-66

Description:

This paper proposes approaches for combining Iterated Greedy techniques, as state-of-the-art methods, with bacterial evolutionary algorithms based on a hybrid technique involving the Multi-Threaded Iterated Greedy heuristic and a memetic algorithm in order to efficiently solve the Permutation Flow Shop Problem on parallel computing architectures. In the present work three novel approaches are proposed by combining a variant of the Bacterial Memetic Algorithm and the recently proposed Bacterial Iterated Greedy technique with the mentioned hybrid multi-threaded approach. The techniques thus obtained are evaluated via simulation runs carried out on a series of data from the well-known Taillard's benchmark problem set. Based on the experimental results the multi-threaded hybrid methods are compared to each other and to the original techniques (i.e. to the techniques without bacterial algorithms). © 2012 IEEE.

Open Access: Yes

DOI: 10.1109/CINTI.2012.6496734

Comparing Different Phosphorus Extraction Methods: Effects of Influencing Parameters

Csaba Centeri Renato Kalocsai G. Milics Márton Vona Zsolt Biró Viktoria Vona A. J. Kovács J. Kauser István Mihály Kulmány Gergely Jakab

Publication Name: Sustainability Switzerland

Publication Date: 2022-02-01

Volume: 14

Issue: 4

Page Range: Unknown

Description:

The current study compares the phosphorus (P) analysis methods of ammonium lactate (AL), Mehlich 3 (M3); water extraction (P-WA(P)&P-WA(PO4 )), cobalt hexamine (CoHex) and X-ray fluorescence (XRF) as an estimate of total soil P. The ratio of the P-content/XRF was first calculated and compared with the whole dataset. Based on the comparison of all the data, there were significant differences between the results of P-WA(P) and P-WA(PO4 ) vs. M3 and AL, CoHex vs. M3 and CoHex vs. AL methods (p < 0.001). The second step was the analysis of the influencing factors based on their categories for a more in-depth understanding of their role (CaCO3-content, pH, soil texture and clay content). The results showed that higher CaCO3 content (>1%) resulted in lower correlations (6/10 cases). The extraction methods, the soil, the classification method of the soil properties and the statistical analyses affect the evaluation. The dataset covers a good range of the analysed factors for the evaluation of phosphorus in the majority of Hungarian soil types in arable use. There were two methods that detected the largest amount of P from the total P in the soil: AL and M3.

Open Access: Yes

DOI: 10.3390/su14042158

Impact of Information Communication Technology on labor productivity: A panel and cross-sectional analysis

Yuriy Bilan Rafał Kasperowicz Dalia Streimikiene Aviral Tiwari Yash Laddha

Publication Name: Technology in Society

Publication Date: 2022-02-01

Volume: 68

Issue: Unknown

Page Range: Unknown

Description:

This article examines the contribution of information and communications technologies (ICT) to labor productivity using panel data approach. The study covers the period of 2000–2015 for a complete dataset of 98 countries as well for three selected groups: low-income, middle-income, and high-income countries. The findings imply that telephone subscription and broadband subscription have a significant impact on overall labor productivity as well as labor productivity of service sector. The ICT affects the labor productivity, so investing in Information Communication Technology is necessary to increase the labor productivity.

Open Access: Yes

DOI: 10.1016/j.techsoc.2022.101878

The effect of soil physicochemical characteristics on zinc analysis methods

Csaba Centeri Renato Kalocsai G. Milics Zsolt Biró Viktoria Vona A. J. Kovács Endre Andor Tóth István Mihály Kulmány Gergely Jakab Zsolt Giczi

Publication Name: Soil and Water Research

Publication Date: 2021-01-01

Volume: 16

Issue: 3

Page Range: 180-190

Description:

Zn is an essential micronutrient involved in a wide variety of physiological processes. Soils are tested for zinc in many countries with several extractants. Each country has its validated methods, best-suited for its soils. The current study was designed to compare different zinc content measuring methods with seventy-one samples from Hungary. The data were first compared for the whole dataset and then in certain categories such as CaCO3-content, pH, texture and clay content. The zinc content was determined by the water extraction, KCl-EDTA (ethylenediaminetetraacetic acid), Mehlich 3, CoHex (cobalt hexamine trichloride), and XRF (X-ray fluorescence) methods. Based on the analyses of all the data, we can conclude that all the methods are different. However, further analyses during the comparison of the methods based on the influencing factors, such as the pH, lime content, texture class, and clay content proved that, in some of the cases, there are similarities among the methods and, this way, we can get more knowledge on the measurements and the results provided. Farmers can gain extra knowledge from the comparison of the influencing factors to know where intervention is needed to use extra Zn for the proper fertilisation of their plants.

Open Access: Yes

DOI: 10.17221/53/2020-SWR