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Publications - 6525

Classification of fullerene isomers using local topological descriptors

Eniko Bitay István László Tomislav Došlić Tamás Réti

Publication Name: Materials Science Forum

Publication Date: 2010-01-01

Volume: 659

Issue: Unknown

Page Range: 447-451

Description:

A method for the structural classification of fullerenes via graph invariants is presented. These graph invariants (called edge-parameters) represent the 9 different types of bonds existing in fullerenes between two neighbouring carbon atoms and they are also applicable to classify the fullerene isomers into equivalence classes. Discriminating performance of edge-parameters has been tested on the sets of C40 and C66 fullerene isomers. It is shown that the stability of C40 and C66 isomers can be efficiently predicted using a novel topological descriptor (Ω) defined as a function of four appropriately selected edge parameters. © (2010) Trans Tech Publications.

Open Access: Yes

DOI: 10.4028/www.scientific.net/MSF.659.447

Differential expression of six genes in fat-type Hungarian Mangalica and other pigs

Zoltán Simon Károly Tempfli László Pongrácz Barbara Kiss Klaudia Szalai Ágnes Bali Papp

Publication Name: Archives Animal Breeding

Publication Date: 2016-06-14

Volume: 59

Issue: 2

Page Range: 259-265

Description:

In order to identify potential variances in gene expression of phenotypically different pig breeds, six fat-metabolism-related genes were analyzed in backfat and muscle tissues of fat-type Mangalica (MAN), Mangalica x Duroc (MD), and lean-type Hungarian Large White (HLW) and Pietrain x Duroc (PD) pigs by means of quantitative reverse transcription PCR (qRT-PCR). Higher (P < 0.05) adipocyte fatty-acid-binding protein (A-FABP) expression was observed in backfat and muscle tissues of purebred and crossbred MAN than in those of HLW and PD. In all breeds and crosses, adiponectin (ADIPOQ) was predominantly expressed in backfat at a similar level (P > 0.05), whereas muscle ADIPOQ expression was highest (P < 0.05) in MAN and MD. Levels of fatty acid synthase (FASN) mRNA were greatest in MAN, moderate in MD, and lowest in HLW and PD backfat and muscle. The fat mass and obesity-associated gene (FTO) was more abundant in MAN and MD backfat, whereas muscle expressions did not differ (P > 0.05) between breeds. Regarding leptin (LEP) expression, MAN produced the greatest levels in backfat, while HLW produced the lowest. In muscle, highest LEP was detected in MAN and MD. Between groups, perilipin 2 (PLIN2) was expressed similarly in backfat; however, PLIN2 was more abundant in muscle of MAN and MD than in that of HLW and PD. Differences in gene expression can contribute to the development of the characteristic fatty phenotype in MAN pigs. The identification of differentially expressed genes facilitates targeted sequencing and genotyping efforts for further studies.

Open Access: Yes

DOI: 10.5194/aab-59-259-2016

Nigerian Radicalism: Towards a New Definition via a Historical Survey

Adam Mayer

Publication Name: Historical Materialism

Publication Date: 2024-01-01

Volume: 1

Issue: 1

Page Range: 1-36

Description:

Recent military coups in West Africa have put the continent's democratisation itself into question. In some places, for the moment, these coups appear to have popular backing. Nigeria, where radicalism is firmly rooted in democratic values and a human-rights framework, the radical grassroots opposition to the Buhari government's creeping authoritarianism lies drenched in blood. The roots of this development go back to the history of Nigeria's radicalism in the twentieth century. Much has appeared on the global 1968 recently, including that of Africa. 1970s/1980s-style radicalism is reappearing today with Omoyele Sowore's 2018 presidential candidacy, with the African Action Congress party, the #EndSARS protests and the tragic Lekki Toll Gate massacre (2020) in Nigeria. The shift towards radicalism is palpable with protest music such as Falz's This is Nigeria, and Burna Boy's Monsters you Made, both explicitly targeting neocolonialism and police brutality. Contrary to Achille Mbembe's sweeping dismissal of African radicalism, the movement with very deep roots under study is meaningful once again, and is gathering momentum in West Africa's giant polity. This article applies Walter Benjamin's and also Nigerian radical thinkers' conceptualisation of political, social and artistic radicalism, while it frames the Nigerian version via the movement's history, in which marxisant theory and praxis, feminism, human rights and pro-democracy movements interact with emancipatory strands of Islam, Christianity, Igbo Judaism, and animism. In the context of Nigerian radicalism, even expressly pro-capitalist art theory performs a radical social function by stressing the African's right to make universal statements (Olu Oguibe) in its de facto defiance of the neo-colony. As these different strands of protest meet, ethnic uprisings (amongst them ipob) find ways to establish common cause with social radicalism, posing a composite threat to the prebendalist oligarchy that rules and oppresses the country via a militarised neoliberalism.

Open Access: Yes

DOI: 10.1163/1569206x-bja10033

Military Migration and Demographic Transformations in Ukraine: Military Consequences for Territorial Communities

L. Akimova Halyna Mishchuk M. I. Karpa Oleksandr Akimov L. Akimova H. Karolyi

Publication Name: Ukrainian Geographical Journal

Publication Date: 2025-01-01

Volume: 2025

Issue: 3

Page Range: 75-86

Description:

Population migration is one of the natural phenomena that occurs in society regardless of the form of social and economic system, and is considered within the framework and at the intersection of various sciences. However, military migration has its unique features and a distinct landscape of its processes, occurrences, and ongoing developments. The subject of this research is the complex of problems related to military migration in Ukraine, as well as its impact on the socio-economic development of territorial communities. The article aims to map both visible situations and latent processes in the territorial communities of Ukraine caused by military migration during the Russo-Ukrainian War. It is demonstrated that the consequences of military migration have both positive and negative aspects, thereby becoming a source of conflict and contributing to a decline in living standards within territorial communities. The need to combine the efforts of government bodies, civil society, and stakeholders in a comprehensive study of the consequences of military migration on communities is emphasized to develop effective models and strategies to overcome negative patterns. The fundamental issues surrounding military migration are reexamined to incorporate some of the significant new field data that has surfaced recently and to outline the policy implications of the results.

Open Access: Yes

DOI: 10.15407/ugz2025.03.075

Motion control and communication of cooperating intelligent robots by fuzzy signatures

Tamás D. Gedeon Áron Ballagi Laszlo T. Koczy

Publication Name: IEEE International Conference on Fuzzy Systems

Publication Date: 2009-12-10

Volume: Unknown

Issue: Unknown

Page Range: 1073-1078

Description:

This paper presents two examples of usage of fuzzy signatures in the field of mobile robotics. The first shows a complex lateral drift control method base on fuzzy signatures. This method inspects the motion system of the robot as a whole, unlike as simple parts of a complex system. The state space is written down by fuzzy signatures which add up flexibility, adaptability and learning ability to the system. In the second experiment a new communication approach is investigated for intelligent cooperation of autonomous mobile robots. Effective, fast and compact communication is one of the most important cornerstones of a high-end cooperating system. In this paper we propose a fuzzy communication system where the codebooks are built up by fuzzy signatures. We use cooperating autonomous mobile robots to solve some logistic problems. ©2009 IEEE.

Open Access: Yes

DOI: 10.1109/FUZZY.2009.5277207

Recognition of built-up and non-built-up areas from road scenes

Gabriella Kosztolányi-Iván Csaba Koren Attila Borsos

Publication Name: European Transport Research Review

Publication Date: 2016-06-01

Volume: 8

Issue: 2

Page Range: Unknown

Description:

Purpose: In many cases, it does not follow from the road design, whether the given scene is within or outside the posted built-up area. The purpose of this paper is to evaluate road scenes, how far they can be considered being of built-up and non-built-up nature, as well as to identify road scenes which are ambiguous and therefore less safe. Methods: Two methods were used to assess the degree of unambiguous or ambiguous nature of road scenes. In the first approach, a survey of requested speeds at various road scenes was performed with 500 respondents. Here clearly non-built-up and built-up sites, as well as unclear sites were compared. In the second method, the recognition process of drivers was simulated by an image classification software. The classifier was trained by 100 clearly built-up and 100 non-built-up pictures. Four test runs followed, each using 200 pictures from different roads. Results: From the speed choice study, results have shown that in unclear situations (e.g. transition between built-up and non-built-up areas) the standard deviation of chosen speeds is higher than in unambiguous situations. In the image classification study the trained classifier worked well for road scenes which are definitely of built-up or non-built-up nature. Furthermore, as expected, for unclear situations, the classifier gave uncertain classifications. Conclusions: Each of the two methods produces an output indicator, the standard deviation of speeds and the certainty score, respectively. Both indicators can serve to identify road scenes leading to uncertain and therefore risky situations.

Open Access: Yes

DOI: 10.1007/s12544-016-0205-9

Utility of time factor in logistic optimization

Péter Földesi Edit Süle

Publication Name: Proceedings 2009 3rd International Workshop on Soft Computing Applications Sofa 2009

Publication Date: 2009-11-25

Volume: Unknown

Issue: Unknown

Page Range: 209-214

Description:

The paper deals with the investigation of the critical factor of the supply chain, with regards to time. The literature review can give a background to understand and handle the reasons and consequences of the growing importance of time. It analyses the time- and place-value of products and it evaluates time by showing theoretical functions as well. By using utility functions to represent the value of various delivery-times for the different participants in the supply chain, including the final customers, it proves through the Kano-model, that the choices, behaviour and willingness of payment of time-sensitive and non time-sensitive consumers are different for varying lead times, so for optimization soft computing techniques must be applied. © 2009 IEEE.

Open Access: Yes

DOI: 10.1109/SOFA.2009.5254851

Supersonic flow simulation on IBM cell processor based emulated digital cellular neural networks

Sándor Kocsárdi Zoltán Nagy András Kiss Árpád Csík

Publication Name: Proceedings IEEE International Symposium on Circuits and Systems

Publication Date: 2009-10-26

Volume: Unknown

Issue: Unknown

Page Range: 1225-1228

Description:

In the area of mechanical, aerospace, chemical and civil engineering the solution of partial differential equations (PDEs) has been one of the most important problems of mathematics for a long time. In this field, one of the most exciting areas is the simulation of fluid flow, which involves for example problems of air, sea and land vehicle motion. In engineering applications the temporal evolution of non-ideal, compressible fluids is quite often modeled by the system of Navier-Stokes equations. They are a coupled set of nonlinear hyperbolic partial differential equations and form a relatively simple, yet efficient model of compressible fluid dynamics. Unfortunately the necessity of the coupled multi-layered computational structure with nonlinear, space-variant templates does not make it possible to utilize the huge computing power of the analog Cellular Neural Network Universal Machine (CNN-UM) chips. To improve the performance of our solution emulated digital CNN-UM implemented on IBM Cell Broadband Engine has been used. The goal is to perform the operations with the highest possible parallelism. ©2009 IEEE.

Open Access: Yes

DOI: 10.1109/ISCAS.2009.5117983

Dynamic investigation of composite metal foams using substructure techniques

Balázs Pere Márió Kovács

Publication Name: International Journal of Structural Integrity

Publication Date: 2026-01-01

Volume: Unknown

Issue: Unknown

Page Range: 1-18

Description:

Purpose – The accurate characterisation of the dynamic behaviour of inhomogeneous materials is a challenging task. Examples of such materials are composites, which are becoming increasingly common in the industrial world. Wave propagation studies in these materials, which are hard to model, are usually very complicated and difficult or even impossible to generalise to other composites. The authors aim to develop a special, easy-to-use finite element method to investigate wave propagation in any composite in a memory-efficient and accurate way. Design/methodology/approach – The study combines the substructure technique, a method published in the 1970s, with the central difference method (CDM) in a specific way. This can be called as Combined Method (CM). It is important to note that CM and CDM are completely identical in accuracy, as using the substructure technique is only an equation rearrangement. Findings – For metal matrix syntactic foams (MMSFs), it has been shown that CM can significantly decrease the memory requirements of the finite element models without loss of accuracy. Moreover, it greatly reduces the time-consuming construction of large-scale inhomogeneous finite element models. The comparison between the CDM and CM shows that the larger the model in which the wave propagation is investigated, the greater the advantage of CM. Originality/value – The CM methodology is not only applicable to the study of the wave propagation characteristics of MMSFs, but can easily be transferred to the study of other composites.

Open Access: Yes

DOI: 10.1108/IJSI-11-2025-0306