Search in Publications

Found 6319 publications

The Economic Structure and Performance of the Catchment Area of the Hungarian Regional Centers

Judit Berkes

Publication Name: Deturope

Publication Date: 2020-01-01

Volume: 12

Issue: 3

Page Range: 58-81

Description:

This study examines the economic structure and performance of urban catchment areas. The five largest Hungarian regional centers are a traditional part of the Hungarian city network, as they are the five most populous cities after Budapest. The approach of territorial research is increasingly focused on the fact that the city as a center should not be studied without its immediate surroundings (agglomeration, region, catchment area). This study also keeps this in mind. The data were processed for the period between 1992 and 2015, on the basis of which the change can also be examined. Development trajectories show very different tendencies; Győr operates the catchment area as a strong center, while the surroundings of Pécs became fragmented due to the weakness of the center. Miskolc is characterized by a stagnant area, where the operation of another sub-center is very intensive, thus improving economic performance. Szeged is a solid center, whose catchment area is stabilized by several substations. The area of Debrecen is divided, the center is not able to energize its area.

Open Access: Yes

DOI: 10.32725/det.2020.022

Mathematics self-efficacy, learning approaches, academic performance in the light of the number of failed attempts

No authors available

Publication Name: SEFI 48th Annual Conference Engaging Engineering Education, Proceedings

Publication Date: 2020-01-01

Volume:

Issue:

Page Range: 286-296

Description:

Mathematics is a language for expressing physical, chemical and engineering laws nevertheless engineering students often perform poorly in mathematics. Studying can be influenced by several different social, cognitive and non-cognitive factors which all can have an impact on students' academic performance. Many researches revealed positive effects of mathematics self-efficacy on mathematics achievement. Similar results can be found among learning approaches, students using deep-approach achieve better results. It is legitimate to question whether there is a relationship between self-efficacy and learning approaches. My research focused on the interrelationship between two aspects of mathematics self-efficacy (mastery experience, physiological state), learning approaches (deep strategy, deep motive, surface strategy, surface motive) and achievement. This research also examined the variance of self-efficacy, learning approaches and achievement in relation to the number of failed attempts. 306 undergraduate engineering students at a Hungarian university took part in the study. To examine the above mentioned question the study employed quantitative approach and data were collected using two questionnaires during the semester. The self-efficacy scale was adapted from a variety of sources and was modified to local conditions. To measure learning approaches the Revised Two Factor Study Process Questionnaire was rephrased to the domain of mathematics and to the local conditons. The data were analysed quantitatively using descriptive statistics, bivariate correlation, partial correlation, and regression analysis. The results show that self-efficacy, learning approaches and academic achievement were strongly correlated with each other. Students who have higher level self-efficacy use deep strategy in learning and have deep motives, while students classified as low in self-efficacy adopted surface learning approaches. A new variable was introduced which has not been investigated yet in other researches: the number of failed attempts. A significant correlation between the mentioned variables and the number of attempts was identified. My results demonstrate the importance of such kind of learning environment which fosters self-efficacy and deep learning approach.

Open Access: No

DOI: DOI not available

One-at-a-time sensitivity study of a nonlinear fire truck suspension model

F. Hajdu Rajmund Kuti G. Y. Molnarka

Publication Name: Fme Transactions

Publication Date: 2020-01-01

Volume: 48

Issue: 1

Page Range: 90-95

Description:

In this paper the detailed OAT (one-at-a-time) sensitivity analysis of a nonlinear fire truck suspension system is carried out with numerical simulation. As output to measure sensitivity the RMS of acceleration was chosen, which can be calculated with numerical simulations easily. The degree of sensitivity was measured with a sensitivity index and based on it sensitivity Fuzzy-sets were established. The membership of each parameter to the Fuzzy sets is calculated and based on it, it was determined which parameters are the most sensitive. With the presented results it is shown that the proposed method is suitable for testing mathematical models as well.

Open Access: Yes

DOI: 10.5937/fmet2001090H

Financial subsidies and the location decision of solar power plants in Hungary: An empirical investigation

Mihály Lados Tamás Tóth Éva Szabina Somossy

Publication Name: Regional Statistics

Publication Date: 2020-01-01

Volume: 10

Issue: 2

Page Range: 166-185

Description:

Recent years have witnessed a significant increase in the number of solar power plants worldwide, including in the European Union. In Hungary, solar capacities have increased tenfold in the past three years, primarily due to the lower cost of solar technology and the favourable investment environment. The integration of these weather-dependent power plants into the electricity system, hitherto, has not been a problem in Hungary. However the expected increase in capacity over the next decade may cause grid problems, implying that the decision about the location of solar power plants is not a secondary issue. Hence, this study examines the factors that impact investors’ choice of the optimal installation site and the extent to which financial assistance, primarily operating support, influence this installation decision. This type of research has not yet been undertaken in the Hungarian context. Therefore, our research – based on a questionnaire survey conducted in March 2018 – fills an important gap. In contrast to the conclusions of the extant literature covering other countries, in the case of solar power plants in Hungary the installation location is not based on natural factors (e.g. irradiation) but on the marketability and price of electricity – classified in the financial support category – as well as the network connection options. Additionally, operating support may influence the location of solar power plant installation, which can be used as valuable information for regulation in the course of further expansion of the domestic photovoltaic power generation.

Open Access: Yes

DOI: 10.15196/RS100207

General formulation for the resilience of processing systems

Ákos Orosz Jean Pimentel Ferenc Friedler

Publication Name: Chemical Engineering Transactions

Publication Date: 2020-01-01

Volume: 81

Issue: Unknown

Page Range: 859-864

Description:

Resilience is one of the key indicators of processing systems, it expresses the behaviour of the system as a result of expected or unexpected failures. This indicator can be essential during systems design and operation, especially, when the system is part of or related to a critical infrastructure. The numerous contributions on systems resilience are related to a wide range of applications, however, there is no general uniform framework for resilience evaluation. For instance, most studies examine resilience as a function of the continuous parameters of the system, usually avoiding the influence of its structure. In the current work, a general framework for determining the structural resilience of processing systems is presented. This framework derives on formulas that satisfy the requirements of the original definition of resilience. The formerly developed P-graph framework is the mathematical basis of the procedure for determining the indicator. The resilience of the system is calculated as a function of the operative subprocesses for all possible failures and is a normalized indicator on [0, 1]. The examination of two industrial case studies shows that the proposed resilience can be an appropriate indicator to be considered in process design.

Open Access: Yes

DOI: 10.3303/CET2081144

A memetic version of the bacterial evolutionary algorithm for discrete optimization problems

Peter Foldesi Boldizsar Tuu-Szabo Ĺaszĺo T. Ḱoczy

Publication Name: Advances in Intelligent Systems and Computing

Publication Date: 2020-01-01

Volume: 945

Issue: Unknown

Page Range: 44-55

Description:

In this paper we present our test results with our memetic algorithm, the Discrete Bacterial Memetic Evolutionary Algorithm (DBMEA). The algorithm combines the Bacterial Evolutionary Algorithm with discrete local search techniques (2-opt and 3-opt). The algorithm has been tested on four discrete NP-hard optimization problems so far, on the Traveling Salesman Problem, and on its three variants (the Traveling Salesman Problem with Time Windows, the Traveling Repairman Problem, and the Time Dependent Traveling Salesman Problem). The DBMEA proved to be efficient for all problems: it found optimal or close-optimal solutions. For the Traveling Repairman Problem the DBMEA outperformed even the state-of-the-art methods. The preliminary version of this paper was presented at the 3rd Conference on Information Technology, Systems Research and Computational Physics, 2–5 July 2018, Cracow, Poland [1].

Open Access: Yes

DOI: 10.1007/978-3-030-18058-4_4

SZTAKI @ ImageCLEFmed 2020 Tuberculosis Task

No authors available

Publication Name: CEUR Workshop Proceedings

Publication Date: 2020-01-01

Volume: 2696

Issue:

Page Range: Unknown

Description:

In this paper we describe our submission to the ImageCLEFmed 2020 Tuberculosis task and discuss additional results on the training set with various neural networks. After some centralization and normalization we independently categorized the 2D slices with convolutional neural networks (traditional and residual feed-forward networks) and we aggregated the individual predictions based on the positions of the lung and the slices. Our additional experiments with various aggregation methods indicate that individual slices do not necessary contain enough information about such complex structures.

Open Access: No

DOI: DOI not available

The Acquisition of Phonological Awareness in Children with Mild General Learning Difficulties: Delayed or Disordered Speech Development?

No authors available

Publication Name: On Under-Reported Monolingual Child Phonology

Publication Date: 2020-01-01

Volume:

Issue:

Page Range: 274-323

Description:

Open Access: No

DOI: DOI not available

The Hungarian Constitutional Court’s Decision on the Protection of Groundwater Decision No. 13/2018. (IX. 4.) AB of the Constitutional Court of Hungary

Gábor Kecskés

Publication Name: Hungarian Yearbook of International Law and European Law

Publication Date: 2020-01-01

Volume: 8

Issue: 1

Page Range: 371-382

Description:

On 28 August 2018, the Constitutional Court of Hungary delivered a milestone decision [Decision No. 13/2018. (IX. 4.) AB] in relation to the protection of groundwater with reference to the general protection of the environment as a constitutionally protected value. The President of the Republic pointed out in his petition to the Constitutional Court that two sections of the draft legislation are contrary to the Fundamental Law by violating Articles B(1), P(1) and XXI(1) of the Fundamental Law by permitting water abstraction with much lower standards. Adopted by the majority along with concurring and dissenting opinions, the decision is an important judicial achievement in the general framework of constitutional water and environmental protection. It also confirms the non-derogation principle elaborated by the Constitutional Court. The Constitutional Court had the opportunity and an ‘open mind’ to take into consideration numerous sources of scientific professional evidence on the stock of water and groundwater abstraction. The decision was acclaimed for its environmental orientation, and even more, for developing the 25-year old standards of constitutional review in environmental matters by elaborating on the implicit substance of several articles enshrined in the new Fundamental Law (e.g. Articles P and XXI).

Open Access: Yes

DOI: 10.5553/HYIEL/266627012020008001022