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Found 6289 publications

Experimental investigation of single point incremental forming of aluminium alloy foils

Imre Paniti Dóra Harangozó Zsolt János Viharos

Publication Name: 16th Imeko Tc10 Conference 2019 Amp Amp Amp Amp Amp Quot Testing Diagnostics and Inspection as A Comprehensive Value Chain for Quality and Safety Amp Amp Amp Amp Amp Quot

Publication Date: 2019-01-01

Volume: Unknown

Issue: Unknown

Page Range: 50-55

Description:

Incremental Sheet Forming is a prosperous process to manufacture sheet metal parts that is well adapted for prototypes or small batch production. Compared to traditional sheet forming technologies this relatively slow process is only profitable for the above mentioned production types but it can be used in different applications in automotive and aircraft industries, in architecture engineering and in medical aids manufacturing. In this paper indirectly obtained axial forming force on Single Point Incremental Forming (SPIF) of variable wall angle geometry were studied under different process parameters. The estimation of the forces on AlMn1Mg1 sheets with 0.22 mm initial thickness is performed by continuous monitoring of servo motor currents. The deformation states of the formed parts were analysed using the ARGUS optical strain measurement system of GOM. Interaction plot of forming speed, incremental depth, tool diameter and lubrication were also reported.

Open Access: Yes

DOI: DOI not available

The mechanical and the geometrical state of railway vehicle carriages

Lajos Borbás László Bozóky Vince Nagy

Publication Name: Proceedings 25th Danubia Adria Symposium on Advances in Experimental Mechanics Das 2008

Publication Date: 2019-01-01

Volume: Unknown

Issue: Unknown

Page Range: 181-182

Description:

No description provided

Open Access: Yes

DOI: DOI not available

Minimum of Constrained OWA Aggregation Problem with a Single Constraint

Lucian Coroianu Robert Fuller

Publication Name: Lecture Notes in Computer Science Including Subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics

Publication Date: 2019-01-01

Volume: 11291 LNAI

Issue: Unknown

Page Range: 183-192

Description:

In a recent paper we found an analytical formula for the constrained ordered weighted aggregation problem (OWA) when we need to maximize the objective function. In this note we prove that the method works in the case when we need to minimize the objective function. If in the case of the maximization problem we need to rearrange the coefficients in the constrained in nondecreasing order, for the nontrivial minimization problem, it suffice to rearrange them in nonincreasing order.

Open Access: Yes

DOI: 10.1007/978-3-030-12544-8_15

The Role of the Civil Sector in Contribution to Social Well-Being and in Shaping Active Citizenship

Adrienn Reisinger Márta Nárai

Publication Name: Springer Proceedings in Business and Economics

Publication Date: 2019-01-01

Volume: Unknown

Issue: Unknown

Page Range: 101-118

Description:

Nowadays social and economic issues can have unfavourable consequences; social problems both at the global and local level are outstanding and it is essential to find solutions because of the efficient functioning of the economy and the society. Also, state and for-profit actors can take part in solving these problems, but there are lots of services which can be provided only by civil organizations. The first part of the paper presents the concept of civil organizations and current issues of them in Hungary. After that, it describes the way of their contribution to the active citizenship and to social well-being based on theoretical and empirical background. We made a questionnaire research in 2013 among civil organizations at the regional level in Hungary; we would like to show the main results of it. This paper presents a review of the main participatory forms of the organizations through which they can contribute to the improvement of the services and to the expanding of the supply. An important message of the paper is that civil organizations cannot operate without active citizens, our study will also show the methods how civil organizations can contribute to the active citizenship and what kind of elements and barriers have this process. This paper can add to the literature of the civil organizations and can be useful both for policy makers, researchers and citizens.

Open Access: Yes

DOI: 10.1007/978-3-319-89872-8_8

Recent studies on thermodynamic processes in nano-ceramic thermal insulation coatings

David Bozsaky

Publication Name: Pollack Periodica

Publication Date: 2019-01-01

Volume: 14

Issue: 1

Page Range: 107-116

Description:

Among nanotechnology-based thermal insulation materials thermodynamic performance of nano-ceramic coatings generates intensive discussions. Complete agreement has not been found yet about the mechanism of their insulating effect. In the Laboratory of Building Materials and Building Physics at Széchenyi István University (Győr, Hungary) heat transfer resistance experiments have been performed in order to describe thermodynamic processes inside nano-ceramic coatings. Previous studies finding after new measurements conducted in 2016-2017 also supported the former assumption that in case of nano-ceramic coatings convective heat transfer coefficient might be taken into account in a different way. Results also showed that thermal insulating effect of nano-ceramic coatings could be caused by a relatively high surface heat transfer resistance.

Open Access: Yes

DOI: 10.1556/606.2019.14.1.11

On the lower limit for possibilistic correlation coefficient with identical marginal possibility distributions

István Harmati Robert Fuller

Publication Name: Studies in Computational Intelligence

Publication Date: 2019-01-01

Volume: 794

Issue: Unknown

Page Range: 99-113

Description:

In 2011 Fullér et al. [An improved index of interactivity for fuzzy numbers, Fuzzy Sets and Systems, 165 (2011), pp. 50–60] introduced a new measure of interactivity between fuzzy numbers (interpreted as possibility distributions), called the weighted possibilistic correlation coefficient, which can be determined from their joint possibility distribution. They also left two questions open regarding the lower limit of the weighted possibilistic correlation coefficient of marginal possibility distribution with the same membership function. In this paper we will answer these questions not only in the case of fuzzy numbers, but also for quasi fuzzy numbers.

Open Access: Yes

DOI: 10.1007/978-3-030-01632-6_7

Creative cities in Central and Eastern Europe-Examining the position of Gyor from the creative and cultural aspects of this macro-region

Szabolcs Morvay Dávid Fekete

Publication Name: Regional Statistics

Publication Date: 2019-01-01

Volume: 9

Issue: 2

Page Range: 45-66

Description:

The European Union is paying increasing more attention to the creative sector, acknowledging the economic significance of the sphere and appreciating the social benefits of creative and cultural activities. Its latest innovation is the Cultural and Creative Cities Monitor (CCCM), which shows the creative vibrancy of 168 European cities, thus enabling a comparison and ranking in terms of different creative and cultural aspects. Gyor has been included in this platform's list besides Budapest, Pecs, and Szeged. In this study the creative position of Gyor, in relation to similar mid-sized Central and Eastern European cities is examined, thus estimating the creative potential of Gyor. The analysis enables us to observe the elements and indicators of a creative city that are used to measure and show creativity. Exploring the city's strengths and weaknesses provides guidance as the CCCM annually renews its evaluation and changes the ranking. With conscious initiatives Gyor may become more creative, both internationally and locally. Based on the CCCM scores Gyor has numerous strengths: favourable geographic location, adequate amount of cultural offerings, strong economic potential, cultural vibrancy, and a high level of participation in cultural life. However, the city has weak features too, that require strengthening. The aim is for the cities to become more creative, but this requires analysis from the creative and cultural aspects. We offer an analysis that focuses on Hungarian cities, on our macro-region and on the creative and cultural elements of these cities.

Open Access: Yes

DOI: 10.15196/RS090209

Notes on micromorphology of third instar larvae of hypoderma actaeon (Brauer, 1858) and H. diana (brauer, 1858) (oestridae, hypodermatidae)

Béla Húsvéth Miklós Bieber Egri Borisi

Publication Name: Acta Microscopica

Publication Date: 2019-01-01

Volume: 28

Issue: 5

Page Range: 933-937

Description:

2472 3rd instar larvae of warble flies (Hypoderma diana and H. actaeon) were collected from 31 roe deer and 52 red deer shot during hunting in the Szigetköz Region, North-West Hungary in the summer, fall and winter of 2018. A special histological method was used for the first time for the better recognition of the fine inner structure of warble fly 3rd instar larvae on wild ungulates. This is the method used for horse bots larvae and has not been described for this purpose earlier. The histological characteristic features of larvae were examined.

Open Access: Yes

DOI: DOI not available

Development of a low-fat lactose-free dairy spread containing viable lactic acid bacteria – Part 2: Texture analysis and sensory evaluation

Gábor Kátay László Varga

Publication Name: Elelmiszervizsgalati Kozlemenyek

Publication Date: 2019-01-01

Volume: 65

Issue: 3

Page Range: 2573-2588

Description:

The objective of our work was to compare the main texture characteristics of the low-fat (30%), lactose-free dairy spread developed by us, containing viable lactic acid bacteria, and those of commercially available dairy spreads by an objective, reproducible, instrumental test, and then to assess the expected market reaction to our new product. The results of the rheological tests have shown that, in terms of its texture, our lactose-free dairy spread is similar to currently commercially available similar dairy products of adequate quality. Compared to 25 to 39% fat products, it is neither softer, nor stickier, its spreadability is close to that of usual dairy spreads. The judges (250 people) found the flavor and texture of the developed product significantly better (P<0.05) than those of one of the traditional dairy spreads that has been available in stores for a long time. However, in terms of spreadability, the latter dairy product was found to be superior (P<0.05). It was found that our new product could be received well when placed on the market, however, it should be emphasized during its introduction that, in addition to the ideal texture characteristics and nutritional physiology properties of the well-known and popular dairy spreads, it also has added functional benefits since it is lactose-free and contains viable lactic acid bacteria.

Open Access: Yes

DOI: DOI not available