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Found 6289 publications

Selection of tool materials for cold forming operations using a computerized decision support system

J. Gram Imre Czinege Imre Felde Tamás Réti D. Y. Ju

Publication Name: Proceedings of the 17th Ifhtse Congress

Publication Date: 2008-01-01

Volume: 2

Issue: Unknown

Page Range: 773-775

Description:

A computerized decision support system (DSS) is outlined which is designated primarily to selcct the proper tool steel grades for various cold forming operations. This computerized system contains four data base: data base of cold forming operations and tools, of work materials, of cold forming tool materials and of wear resistant PVD coatings. The decision strategy makes it possible to select appropriate tool materials taking into consideration their most important material properties (wear resistance, toughness, compressive yield strength, tempering resistance, dimensional stability, machinability, and material price). The practical advantages of the developed decision support system are demonstrated on example.

Open Access: Yes

DOI: DOI not available

Highly qualified social strata in urban areas of Hungarian regional centres from 1980 to 2011

Judit Berkes

Publication Name: Regional Statistics

Publication Date: 2021-01-01

Volume: 11

Issue: 4

Page Range: 126-147

Description:

This study investigates the spatial concentration of highly qualified strata using statistical indicators and Representation of highly qualified social strata means the spatial concentration of groups with higher social status education level, foreign language professional skills, and employment level) in not coincide with mainstream definitions of interaction and networks between social groups). According the most basic assumptions of the complex city concept, settlements with urban status are much more complex in economic, social, and technical structure and their network relations and interactions than settlements that have not been declared as cities. Simultaneously, the difference in social composition between cities and other settlements cannot be disputed because the concentration of economic resources and activities and the potential of employment and the fact that higher income attracts skilled workers to the cities and their catchment areas; all of these resulting in a higher proportion of highly qualified social strata. To meet the increasing needs of the global society and results of the transition to a market economy and globalization processes, a wider range of services are emerging, so the workforce is also significant differentiation, causing changes in the characteristics and composition of society. This paper attempts to study these processes exploring the dynamic trends of change in the spatial distribution of the examined groups. The author is looking for answers to questions such as how this aspect measured? Is there a difference in the structure of the society of urban centres and their catchment areas been a change in the spatial-social characterristics of urban areas over the decades?

Open Access: Yes

DOI: 10.15196/RS110406

Introducing the concept of internet of digital reality – part i

Adam B. Csapo Tamás Budai György Wersényi Péter Baranyi

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2021-01-01

Volume: 18

Issue: 7

Page Range: 225-240

Description:

With the growing pervasiveness of Virtual Reality, Augmented Reality, Mixed Reality and Digital Twins combined with Artificial Intelligence, 5G networks and the omni-present 2D Web, we are entering into a new era, characterized by a multi-modal entangled combination of previously disparate realms of IT with human and social cognitive systems. This process of entanglement is arguably leading to a new, qualitatively different kind of reality, in which the bor-ders between the physical and digital world, as well as digital representations and simulations thereof are becoming increasingly fuzzy. Based on these developments, the paper re-interprets some well-known concepts – including virtual reality, augmented reality, mixed reality, as well as virtual / digital simulations and virtual / digital twins. Based on these new interpretations, the paper introduces the higher-level structures of Digital Reality (DR) and Internet of Digital Reality (IoD). It is argued that these structures can lead to a better understanding of the new possibilities afforded to humanity by pervasive digital technologies.

Open Access: Yes

DOI: 10.12700/APH.18.7.2021.7.12

Investigation of effect of water content on railway granular supplementary layers

Szabolcs Fischer

Publication Name: Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu

Publication Date: 2021-01-01

Volume: 2021

Issue: 3

Page Range: 64-68

Description:

Purpose. To determine the relationship between water content of continuously graded granular supplementary layers for railway substructure and their inner shear resistance and load bearing capacity. Methodology. Four different ‘samples’ were produced as standard granular products from andesite. Two of them are common base courses for road construction in Hungary, the other two are common railway supplementary layers. The author performed laboratory measurements (multilevel shear box tests) that are adequate for the evaluation of inner shear resistance. The measurements of load bearing capacity and Proctor tests were executed in the laboratory of Colas Hungaria Ltd. The author performed measurements with the optimal water content values of each sample, as well as lower and higher values than them. This can show how the given granular material is sensible to the change of water content. Findings. It was proved that the granular supplementary layers, which are standardized products in road construction (as base courses), also seems to be adequate in railway construction; they are not so sensible to the variation of their water content. It does not mean that the other two granular layers are not adequate for railway substructures, but the application of road ‘products’ have to be considered as substitute products. Originality. The author tried to emphasize the adequacy of rock mining for construction of ballasted railway tracks, as well as the optimal use of mineral wealth in every country with its results. Practical value. The obtained results of the present paper can be useful in the area of rock mining, and railway infrastructure engineering. During construction procedures the optimal water content values should be taken into considerations for compaction to be able to reach maximal compactness (density), but too high water content has to be avoided, which is based on the results. They can be also considered in the design phase.

Open Access: Yes

DOI: 10.33271/nvngu/2021-3/064

Cultural variance in the metaphorical extension of body part names

Judit Baranyiné Kóczy

Publication Name: Magyar Nyelv

Publication Date: 2021-01-01

Volume: 117

Issue: 3

Page Range: 257-277

Description:

The study examines the cultural embedding of the conceptualization of the human body in a cultural-cognitive linguistic framework. Body parts, organs, body fluids serve as the bases for many metaphorical expressions, which are rooted in physiological experience on the one hand and culturally and historically embedded on the other. The cultural conceptualization of the body can thus be understood as a process at the intersection of physiological experience, cognition, culture, and language. The questions of the study are as follows: (1) What is the role of culture in the figurative (metaphoric or metonymical) use of names of body parts? (2) Which conceptual domains are dominantly utilized in the metaphoric expressions? The paper provides an overview of the main directions of the metaphorical extension of names of body parts through examples from Hungarian and results of research conducted in several other languages. These directions include the domains of EMOTIONS, COGNITION, INTERPERSONAL RELATIONS, CULTURAL VALUES, and issues of spatial representation and grammaticalization.

Open Access: Yes

DOI: 10.18349/MagyarNyelv.2021.3.257

Age-dependent aerobic capacity among young and middle-aged males

Ferenc Ihász József Bognár Balázs Fügedi Piroska Boros Peter Szabó Andras Oláh

Publication Name: Gazzetta Medica Italiana Archivio Per Le Scienze Mediche

Publication Date: 2016-03-01

Volume: 175

Issue: 3

Page Range: 68-75

Description:

BACKGROUND: Good aerobic capacity is one of the attributes of good cardiovascular function. Physical activity that is performed in steady state and the lower third zone of submaximal intensity seems appropriate for physiological adaptation in advancing age. There is a need to evaluate the effect of age on physiological variables contributing to aerobic capacity using submaximal intensities. The purpose of this study is to analyze the differences m oxygen uptake, oxygen pulse, and minute ventilation during exercise at steady state, ventilatory threshold, and maximal intensity zones among men of different ages. METHODS: Three hundred and twelve senior managers m three age groups (20-30, 30-40, and 40-50) completed an exercise protocol in six stages. RESULTS: Hie result demonstrated a series of differences among the age groups: height, weight, oxygen uptake, oxygen pulse and relative minute ventilation. Accordmg to these results the morphological physiological variables decline with age. CONCLUSIONS: These findings demonstrate the specificities of the morphological, ventilatory, metabolic, and cardiovascular changes throughout aging. When designing a physical activity program, it seems that similar principles can be followed in different age groups; however, maximal intensity maintenance is limited by physiological barriers m older adults. (Cite this article as: Ihasz F, Boros P, Szabo P. Olah A, Fueedi B. Bognar J. Age-dependent aerobic capacity among young and middle-aged males. Gazz Med Ital - Arch Sci Med 2016;175:68-75).

Open Access: Yes

DOI: DOI not available

Comparing the properties of meta-heuristic optimization techniques with various parameters on a fuzzy rule-based classifier

A. Tormási László T. Kóczy

Publication Name: Studies in Fuzziness and Soft Computing

Publication Date: 2016-01-01

Volume: 342

Issue: Unknown

Page Range: 157-169

Description:

In this paper, the results of meta-heuristic optimization techniques with various parameter settings are presented. A formerly published Fuzzy-Based Recognizer (FUBAR): A fuzzy rule-based classification algorithm was used to analyze and evaluate the behavior of the used meta-heuristic optimization algorithms for rule-base optimization. Besides the reached accuracy, the execution time, the CPU load of the algorithms, and the effects of the shapes of the fuzzy membership functions in the initial rule-base are also investigated.

Open Access: Yes

DOI: 10.1007/978-3-319-32229-2_12

Special Issue on “TP model transformation based control design theories and applications”

Yeung Yam Péter Baranyi

Publication Name: Asian Journal of Control

Publication Date: 2021-05-01

Volume: 23

Issue: 3

Page Range: 1237

Description:

No description provided

Open Access: Yes

DOI: 10.1002/asjc.2631

Processing systems design considering resilience

Ákos Orosz Jean Pimentel Ferenc Friedler

Publication Name: Computer Aided Chemical Engineering

Publication Date: 2021-01-01

Volume: 50

Issue: Unknown

Page Range: 807-812

Description:

The resilience of a system is defined as the system's capability of recovering from failures. Traditionally, only predictable aspects are considered when designing processing systems. Evaluation of these aspects is performed via assessment of exact indicators and enumeration of all cause-effect options. However, such evaluation is not appropriate for determining the resilience of processing systems, since resilience is based on unexpected events in addition to the expected ones. Consequently, the cause part of the cause-effect relation is not known or not effective. In the current work, the general formula for determining resilience of a system is embedded into a P-graph based process synthesis algorithm. Thus, the resilience can be considered when selecting the most preferred process during its synthesis. The result is illustrated by synthesizing a process of adipic acid production by nitric acid oxidation of KA oil.

Open Access: Yes

DOI: 10.1016/B978-0-323-88506-5.50126-1