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Found 6278 publications

Experimenting with a new population-based optimization technique: FUNgal growth inspired (FUNGI) optimizer

A. Tormási László T. Kóczy

Publication Name: Studies in Fuzziness and Soft Computing

Publication Date: 2018-01-01

Volume: 361

Issue: Unknown

Page Range: 123-135

Description:

In this paper the experimental results of a new evolutionary algorithm are presented. The proposed method was inspired by the growth and reproduction of fungi. Experiments were executed and evaluated on discretized versions of common functions, which are used in benchmark tests of optimization techniques. The results were compared with other optimization algorithms and the directions of future research with many possible modifications/extension of the presented method are discussed.

Open Access: Yes

DOI: 10.1007/978-3-319-75408-6_11

Efficacy of Advanced Robotic and Virtual Therapy in the Treatment of Acute and Subacute Stroke Patients: a Feasibility Study

Tamás Haidegger József Tollár Bence Csutorás Nándor Prontvai Blanka Törő Szilvia Kóra Petra Kós Barbara Kopácsi Veronika Keresztesy Júlia Kutas Dóra Kozma

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2025-01-01

Volume: 22

Issue: 10

Page Range: 83-102

Description:

The aim of this study is to compare the effectiveness of advanced robotic therapy, virtual therapy and conventional physiotherapy in the rehabilitation of patients with acute and subacute stroke. In addition, we aim to further demonstrate the importance of an early mobilisation exercise program in the management of acute stroke patients. Participants (first-time ischaemic stroke patients in acute or subacute stages) were randomly divided into three equal groups (n=10 persons/group): a robot-assisted early mobilisation + virtual reality therapy (ROB+VR) group, a robot-assisted early mobilisation + conventional physiotherapy (ROB+FIZ) group, and a conventional physiotherapy (CON) group. Each group performed a 3-week-long training program (1 hour/session, 5 days/week). The results were measured before and after the exercise. The primary outcome measure used was the modified Rankin Scale (mRS) which indicates the severity of disability in daily activities and measures the degree of independence of the individual. The secondary outcomes were measured by the EuroQoL 5 dimensions questionnaire 5 levels version (EQ-5D-5L), the Berg Balance Scale (BBS), the Barthel Index (BI), and the 6-minute walking test (6mWT). All the three groups showed improvements in most outcomes. The scores for BI, EQ-5D-5L, and mRS showed significant improvements in quality of life. Comparing the groups, the ROB+VR group showed the greatest improvement in the scores in almost all of the tests. From the test scores, the 6-minute walk test had the highest improvement at the end of the therapy (94.58% improvement). Our results show that early robotic mobilization, followed by a movement program, combined with a virtual reality therapy, significantly improve both the speed and quality of rehabilitation after a stroke.

Open Access: Yes

DOI: 10.12700/APH.22.10.2025.10.6

In defense of moral liberalism

John Ryder

Publication Name: Pragmatism Today

Publication Date: 2020-12-01

Volume: 11

Issue: 2

Page Range: 13-24

Description:

Though it is much maligned, liberalism remains a vital component of any viable political and social condition. This claim can be defended, though, only once the confusions concerning the meanings of liberalism are resolved. This can be done by considering the primary contemporary challenges to liberalism, of which there are five: populist nationalism, authoritarianism, elitism, traditionalism, and moral absolutism. Each of these, though in differing ways and some more than others, are sources of illiberalism. To appreciate the meaning and import of what is here called moral liberalism, it is valuable to clarify the nature of the challenges to it and the reasons we have to prefer moral liberalism over any of its illiberal alternatives. In the end, moral liberalism may serve as a viable grounding for contemporary societies and states only in so far as it rests, not on commonly held ideas or consensus, but on the recognition of the many interests that members of groups and societies hold in common.

Open Access: Yes

DOI: DOI not available

Scheduling approach for on-site jobs of service providers

Máté Hegyháti Olivér Osz Tibor Holczinger

Publication Name: Flexible Services and Manufacturing Journal

Publication Date: 2020-12-01

Volume: 32

Issue: 4

Page Range: 913-948

Description:

Nowadays the successful operation of a company is unimaginable without fast and reliable communication. As a result, so-called Communication Service Providers play an important role in today’s business life. Their orders have to be carried out promptly and dependably, let them be requests for new installations, modifications, or maintenance tasks. These orders have to be performed at different locations and they often have deadlines or strict starting times. Violating such a timing requirement usually implies penalties. In this paper, scheduling problems arising at a Hungarian service provider are examined. At this company, orders are decomposed into smaller tasks, which can be performed by specially trained personnel. Transportation of these specialists contributes a lot to the costs and to the complexity of their scheduling, as well. The goal is to minimize the overall cost of satisfying all orders within the given time horizon with the available assets of the company. The proposed approach relies on the S-graph framework, which has been applied to various production scheduling problems in the literature. In addition to an unambiguous and sound S-graph model of the examined problem, slight modifications of the scheduling algorithms for cost minimization, and new bounding methods have been developed. Several of such bounds have been provided and tested for performance and scalability over a large number of generated examples. The sensitivity of the approach for certain problem features has also been examined.

Open Access: Yes

DOI: 10.1007/s10696-019-09359-2

A review on the effect of alternative fuels on the friction and wear of internal combustion engines

Ibolya Zsoldos András Lajos Nagy Jan Knaup

Publication Name: Lecture Notes in Mechanical Engineering

Publication Date: 2018-01-01

Volume: 0

Issue: 9783319756769

Page Range: 42-55

Description:

The climate policy of the EU specifies strict limits for harmful exhaust gases of passenger cars and commercial vehicles. Electric Mobility plays a significant role in reaching the fleet targets, but internal combustion engines (ICEs) will still be necessary in the next 30 years in medium to long distance transportation. Within the scope of this review article, research activities concerning engine performance, exhaust emissions, friction, wear and corrosion of components in relation to drop-in fuel alternatives, as well as the impact of such fuels on the degradation of the lubricant will be presented. Production pathways and properties of alternative fuels will be briefly introduced.

Open Access: Yes

DOI: 10.1007/978-3-319-75677-6_4

On Preservation of Positivity in Some Finite Element Methods for the Heat Equation

Panagiotis Chatzipantelidis Vidar Thomée Zoltán Horváth

Publication Name: Computational Methods in Applied Mathematics

Publication Date: 2015-10-01

Volume: 15

Issue: 4

Page Range: 417-437

Description:

We consider the initial boundary value problem for the homogeneous heat equation, with homogeneous Dirichlet boundary conditions. By the maximum principle the solution is nonnegative for positive time if the initial data are nonnegative. We complement in a number of ways earlier studies of the possible extension of this fact to spatially semidiscrete and fully discrete piecewise linear finite element discretizations, based on the standard Galerkin method, the lumped mass method, and the finite volume element method. We also provide numerical examples that illustrate our findings.

Open Access: Yes

DOI: 10.1515/cmam-2015-0018

Control, Responsibility, Censorship: The Institutional Structure of Hungarian Press Regulation During the First World War – Within the Framework of the 1912 Act on Exceptional Powers

Roland Kelemen

Publication Name: Journal on European History of Law

Publication Date: 2025-01-01

Volume: 16

Issue: 2

Page Range: 133-140

Description:

This study explores the institutional structure of press regulation in Hungary during the First World War, with particular emphasis on there construction of jurisdictional and supervisory relationships. Rather than following a unified, hierarchical model, the wartime system operated through a complex, multi-actor network involving ministries, the Board of Military Supervision (HFB), the Press Subcommittee, prosecutorial authorities, military commands, and the Prime Minister’s Press Office. Drawing on archival sources and official reports, the analysis outline show actual control over the press was divided, how political, military, and judicial authorities exercised oversight, and how mechanisms such as the “three-hour censorship,” confidential notices, and objective prohibitions functioned in practice. Particular attention is paid to the fragmented and contingent nature of provincial press oversight, shaped by structural inconsistencies, linguistic limitations, and proximity to the front. Rather than relying on abstract theoretical frameworks, the article reconstructs the internal dynamics of exceptional legal regulation through the lens of everyday practice and applied legal logic.

Open Access: Yes

DOI: DOI not available

Self-Diagnostic Opportunities for Battery Systems in Electric and Hybrid Vehicles

István Lakatos Szabolcs Kocsis Szurke Péter Ori Gergő Sütheö

Publication Name: Machines

Publication Date: 2024-05-01

Volume: 12

Issue: 5

Page Range: Unknown

Description:

The number of battery systems is also growing significantly along with the rise in electric and hybrid car sales. Different vehicles use different types and numbers of batteries. Furthermore, the layout and operation of the control and protection electronics units may also differ. The research aims to develop an approach that can autonomously detect and localize the weakest cells. The method was validated by testing the battery systems of three different VW e-Golf electric vehicles. A wide-range discharge test was performed to examine the condition assessment and select the appropriate state of charge (SoC) for all three vehicles. On the one hand, the analysis investigated the cell voltage deviations from the average; the tests cover deviations of 0 mV, 12 mV, 60 mV, 120 mV, and 240 mV. On the other hand, the mean value calculation was used to filter out possible erroneous values. Another important aspect was examining the relationship between the state of charges (SoC) and the deviations. Therefore, the 10% step changes were tested to see which SoC level exhibited more significant voltage deviations. Based on the results, it was observed that there are differences between the cases, and the critical range is not necessarily at the lowest SoC level. Furthermore, the load rate (current) and time of its occurrence play an important role in the search for a faulty cell. An additional advantage of this approach is that the process currently being tested on the VW e-Golf can be relatively simply transferred to other types of vehicles. It can also be a very useful addition for autonomous vehicles, as it can self-test the cells in the system at low power consumption.

Open Access: Yes

DOI: 10.3390/machines12050324

Cognitive control functions in monolingual children with developmental language disorder and in typically developing bilingual children

Alexandra Rohár Klára Marton

Publication Name: Magyar Pszichologiai Szemle

Publication Date: 2020-12-01

Volume: 75

Issue: 4

Page Range: 623-638

Description:

Purpose: The goal of this study is to present the theoretical conceptions related to cognitive control, highlighting those main components that show a close relationship with language processing. Further, our goal was to review these functions in two distinct language groups: children with developmental language disorders and typically developing bilingual children. Specifically, we were interested in the way certain factors of language competence and performance interact with the cognitive control functions. Method: We compared the cognitive control functions between monolingual children with developmental language disorders and their typically developing peers, as well as between bilingual children and their monolingual peers. The following aspects were considered for our review: the target population - school-age monolingual children with developmental language disorders or school-age typically developing bilingual children; studies that employed tasks that measure response inhibition, resistance to interference, working memory updating and cognitive flexibility. Results: Overall, there are many conflicting results in the literature due to the heterogeneity of the groups and the differences across methodological approaches. Despite these inconsistencies, children's cognitive control functions are highly associated with their language skills; while the children with developmental language disorders show deficits in resistance to interference, working memory updating, and cognitive flexibility compared to their typically developing peers, the bilingual children show superior performance in these functions compared to their monolingual peers. Response inhibition was the only function that did not differ across groups. Conclusions: Based on the above, language development shows a close relationship with a number of cognitive control functions. The interaction between cognitive control and language, however, indicates different directions in the two target groups. Whereas poor cognitive control in children with developmental language disorders may contribute to their lower level of language skills, the cognitive advantage of bilingual children is the result of their bilingual language use and practice across different social contexts.

Open Access: Yes

DOI: 10.1556/0016.2020.00036