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Publications - 6278

Bacterial memetic algorithm for offline path planning of mobile robots

János Botzheim Yuichiro Toda Naoyuki Kubota

Publication Name: Memetic Computing

Publication Date: 2012-03-01

Volume: 4

Issue: 1

Page Range: 73-86

Description:

The goal of the path planning problem is to determine an optimal collision-free path between a start and a target point for a mobile robot in an environment surrounded by obstacles. This problem belongs to the group of combinatorial optimization problems which are approached by modern optimization techniques such as evolutionary algorithms. In this paper the bacterial memetic algorithm is proposed for path planning of a mobile robot. The objective is to minimize the path length and the number of turns without colliding with an obstacle. The representation used in the paper fits well to the algorithm. Memetic algorithms combine evolutionary algorithms with local search heuristics in order to speed up the evolutionary process. The bacterial memetic algorithm applies the bacterial operators instead of the genetic algorithm's crossover and mutation operator. One advantage of these operators is that they easily can handle individuals with different length. The method is able to generate a collision-free path for the robot even in complicated search spaces. The proposed algorithm is tested in real environment. © 2012 Springer-Verlag.

Open Access: Yes

DOI: 10.1007/s12293-012-0076-0

A Preliminary Study on Laser Surface Texturing of Passenger Car Engine Piston Rings

András Lajos Nagy Attila Schweighardt Gabor Laki Gergely Kovács

Publication Name: Fme Transactions

Publication Date: 2025-01-01

Volume: 53

Issue: 2

Page Range: 252-259

Description:

Laser surface texturing offers a possible solution for reducing friction between sliding surfaces in engineering applications. Optimized surface topography can also contribute to reduced wear and elevated longevity by modifying the load and speed-dependent friction state in a system. This preliminaryexperimental study investigates the applicability of affordable fibre laser marking systems for microtexturing piston rings, in order to achieve a measurable reduction in friction under subsystem model conditions. A selection of textures are applied to chromium-coated cast iron piston rings. The resulting surface topographies are characterized through confocal microscopy and subjected to friction testing. A correlation analysis is conducted on surface topography parameters to identify key laser process parameters. Findings indicate an improvement in the range of 7–8% in terms of friction coefficient with appropriate texture size.

Open Access: Yes

DOI: 10.5937/fme2502252L

Energy-Conservative Algorithm for the Numerical Solution of Initial-Value Hamiltonian System Problems

E. M. Miletics

Publication Name: Journal of Advanced Computational Intelligence and Intelligent Informatics

Publication Date: 2004-09-01

Volume: 8

Issue: 5

Page Range: 495-498

Description:

The numerical treatment of ODE initial-value problems has been intensively researched. Energy-conservative algorithms are very important to dinamic systems. For the Hamiltonian system the symplectic algorithms are very effective. Powerful computers and algebraic software enable the creation of efficient numerical algorithms for solving ODE initial-value problems. In this paper, we propose an adaptive energy-conservative numerical-analytical algorithm for Hamiltonian systems. This algorithm is adaptable to initial-value problems where some quantities are preserved. The algorithm and its efficiency are presented for solving two-body and linear oscillator problems.

Open Access: Yes

DOI: 10.20965/jaciii.2004.p0495

A bibliometric investigation of chatbot applications in business and management

Abderahman Rejeb Karim Rejeb

Publication Name: Discover Applied Sciences

Publication Date: 2025-10-01

Volume: 7

Issue: 10

Page Range: Unknown

Description:

Chatbots have become a pivotal technology in business and management. Despite their growing adoption, existing research on chatbots is diverse and fragmented, lacking a cohesive overview of the field’s development and emerging trends. This study aims to answer the core research question: “What are the major research patterns, influential contributors, and emerging themes in chatbot-related literature within business and management between 2018 and 2024?” To address this, a structured four-step bibliometric methodology was applied to systematically collect, screen, and analyze relevant literature. A total of 331 peer-reviewed journal articles published between 2018 and 2024 were retrieved from the Web of Science database. Bibliometric and metadata analyses were conducted using CiteSpace software, including keyword co-occurrence, co-citation, and collaboration network visualizations. The findings show a steady rise in chatbot publications, with the highest output in 2023 (88 articles) and 2024 (85 articles). Prolific authors include Mou Jian, Lova Rajaobelina, and Xueming Luo, while top institutions are the University System of Ohio and the Indian Institute of Management. Core themes include AI, customer service, trust, and consumer experience, with emerging topics such as large language models and service quality. Influential cited works focus on anthropomorphism, technology acceptance, and generative AI. This study provides quantitative insights into the evolution of chatbot research, highlights key contributors and trends, and offers practical implications for improving chatbot design and adoption in business contexts.

Open Access: Yes

DOI: 10.1007/s42452-025-07770-z

Natural Resources for Human Health: A New Interdisciplinary Journal Dedicated to Natural Sciences

Ana Sanches Silva Karel Šmejkal Rasul Suleria Michał Tomczyk Chunpeng Wan Ren Wang Ihosvany Camps Carlos L.Cespedes Acuña Jaruporn Rakmai Alessandra Cincinelli Jelena Popovićdjordjević Dongdong Wang Manoj G. Kulkarni Bharat B. Aggarwal Onur Bender Tarun Belwal Hafiz Ansar Zhaojun Wei Jianbo Xiao Jialin Xu Zhiling Yu Gökhan Zengin Jesus Simal-Gandara Mohammad Amjad Kamal Shafi Ullah Khan Ricardo DG De Albuquerque Diego Claudio Ferrante Andrei Mocan Adriano Mollica In Ho Kim Haipeng Lv Si Mi Ashwell R. Ndhlala Visweswara Rao Satyajit D. Sarker Barbara Sawicka Gautam Sethi Vince Ördög

Publication Name: Natural Resources for Human Health

Publication Date: 2021-08-01

Volume: 1

Issue: 1

Page Range: 1-2

Description:

No description provided

Open Access: Yes

DOI: 10.53365/nrfhh/141005

Postural Responses in Trauma-Experienced Individuals

Jennifer W. McVige Adam Koncz Kristof Schwartz Evelin Máté Anna Lobko Mustafa Yildirim Dora Egri

Publication Name: Biomedicines

Publication Date: 2024-12-01

Volume: 12

Issue: 12

Page Range: Unknown

Description:

Background: Balance and proprioception are essential elements in postural control and injury prevention. Proprioception, the body’s sense of position and movement, is closely tied to balance, which depends on input from the visual, vestibular, and somatosensory systems. This article explores the link between trauma experiences and proprioceptive dysfunction, emphasizing how heightened muscle tone, dissociation, and altered sensory processing contribute to balance issues and the risk of injury. Method: The study included 48 participants, aged 18–25. Participants completed the Emotional Regulation Scale, Dissociative Experiences Scale II, and Childhood Trauma Questionnaire, after which they had to stand on a BTrackS Balance Plate while being exposed to images that are designed to evoke emotions from the OASIS image set. The balance plate software calculated outcomes of the participants’ postural sway (total sway, sway area, root mean square (RMS) to the mediolateral (ML) and anteroposterior (AP) way, and excursion to ML and AP ways). Results: Dissociative experience shows significant correlation with RMS ML when viewing positive pictures (rτ = 0.207, p = 0.045) and when viewing negative pictures again; scores with RMS ML (rτ = 0.204, p = 0.049) but also with RMS AP (rτ = 0.209, p = 0.042) and with Excursion ML (rτ = 0.200, p = 0.049) were significant. Experiences of physical abuse affected certain indicators of postural sway when viewing positive images compared to participants with no such experience (sway area: U = 374.50, p = 0.027; RMS AP: U = 383.50, p = 0.016; Excursion ML: U = 397.00, p = 0.007). Similarly, physical neglect affected postural sway during viewing of negative images (sway area: U = 366.50, p = 0.003; RMS AP: U = 371.00, p = 0.004; Excursion ML: U = 347.00, p = 0.034; and Excursion AP: U = 353.00, p = 0.010). Conclusions: The study highlights that dissociation disrupts balance in trauma survivors, especially under emotional stress which highlights the potential for motor-based treatments.

Open Access: Yes

DOI: 10.3390/biomedicines12122766

THE RIGHT TO DEFENSE IN THE CONTEXT OF PENAL ENFORCEMENT: INTERNATIONAL AND EUROPEAN HUMAN RIGHTS STANDARDS

Andras Czebe András György Payrich

Publication Name: Balkan Social Science Review

Publication Date: 2025-12-01

Volume: 26

Issue: 26

Page Range: 205-227

Description:

This study analyses the evolution and current standards of the right to defense within the framework of penal enforcement, as developed under international and European human rights law. It examines how the guarantees of legal assistance, access to counsel, and fair treatment of persons deprived of liberty have been shaped by three major legal systems: the United Nations, the Council of Europe – particularly through the jurisprudence of the European Court of Human Rights – and the European Union. The paper identifies the principal legal instruments and case law defining defense rights during imprisonment, including the UNCAT, the Nelson Mandela Rules, the ECHR, and the EU directives on procedural safeguards and legal aid. Special attention is given to the interaction between the ECtHR and the CJEU in harmonizing standards of fair trial and legal assistance. The analysis concludes that the right to defense in penal enforcement represents an evolving and integral component of the rule of law, requiring constant judicial oversight and coherent implementation across international and regional frameworks.

Open Access: Yes

DOI: 10.46763/BSSR252626205gp

The Impact of “Neoliberal Culture” on Economic Development in the SEE Countries

Laszlo Vasa Yuriy Bilan Niksa Grgurevic Melica Delibasic Justas Streimikis

Publication Name: Montenegrin Journal of Economics

Publication Date: 2025-01-01

Volume: 21

Issue: 1

Page Range: 221-232

Description:

The subject of the paper is to point out the influence of the so-called "neoliberal culture" on economic development in the SEE countries and to explain the relationship between "neoliberal culture" and alternative institutions. In order to understand the topics covered by the research, the nature of the relationship between culture and institutions, as well as the relationship between culture and economic development, are additionally explained. The goal of the research is to ascertain the negative impact of the so-called "neoliberal culture" in SEE countries. It is based on the hypothesis that, with its hybrid and pseudo characteristics, it favored the formation and strengthening of alternative institutions, that is, a long-term socio-economic crisis. In addition to the usual methods of social and economic sciences, the descriptive method and the creation of logical images and schemes were mainly used in the work. In conclusion, the initial hypothesis was verified.

Open Access: Yes

DOI: 10.14254/1800-5845/2024.21-1.17

Closed loop control of finite element model in magnetic system

Miklós Kuczmann Daniel Marcsa

Publication Name: Pollack Periodica

Publication Date: 2015-10-01

Volume: 10

Issue: 3

Page Range: 19-30

Description:

This paper presents an axisymmetric formulation of the circuit-coupled finite element method embedded in closed loop control system. The controller checks the current of the coil of the magnetic system after each time step and controls the applied voltage to reach the steady state faster. The results of the voltage driven finite element model are compared with the results from the analytical model. The control parameters for the proportional-integral-derivative controller were estimated using the step response of the system. Furthermore, the results of the closed loop system simulation show why the model accuracy is important in the controller design.

Open Access: Yes

DOI: 10.1556/606.2015.10.3.4