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Publications - 6374

Flower Pollination Algorithm on optimal design of space trusses

Edina Koch Majid Movahedi Rad Shaymaa Alsamia

Publication Name: International Review of Applied Sciences and Engineering

Publication Date: 2025-10-13

Volume: 16

Issue: 3

Page Range: 418-427

Description:

Abstract: This study assesses the performance of four nature-inspired optimization algorithms—Dynamic Differential Annealed Optimization (DDAO), Flower Pollination Algorithm (FPA), Firefly Algorithm (FF), and Particle Swarm Optimization (PSO) for achieving optimal space truss design. The aim is to minimize the structural weight of three benchmark trusses (10-bar, 25-bar, and 72-bar) while meeting stress and displacement constraints. The key contribution of this work is the first systematic evaluation of FPA in space truss optimization, demonstrating its greater effectiveness in obtaining optimal or near-optimal solutions with faster convergence and higher stability compared to PSO and FF. The results also highlight the limitations of DDAO in handling constrained engineering problems. Findings confirm that FPA and FF are highly effective for structural optimization, offering robust solutions with minimal computational cost. These insights contribute to advancing metaheuristic-based structural design, supporting the adoption of FPA in large-scale optimization problems.

Open Access: Yes

DOI: 10.1556/1848.2025.00958

Optimal Sensor Placement for Autonomous Formula Student Vehicles: A Field-of-View Analysis of Dual LIDAR and Stereo Camera Configurations †

Zoltan Pusztai László Illés Orova Máté Kapocsi

Publication Name: Engineering Proceedings

Publication Date: 2025-01-01

Volume: 113

Issue: 1

Page Range: Unknown

Description:

The optimal configuration of perception systems in autonomous vehicles is essential for accurate environmental sensing, precise navigation, and overall operational safety. In Formula Student Driverless (FSD) vehicles, sensor placement is particularly challenging due to the compact design constraints and the highly dynamic nature of the racing environment. This study investigates the positioning and configuration of two LIDAR sensors and a stereo camera on an FSD race car, focusing on field-of-view coverage, sensing redundancy, and sensor fusion potential. To achieve a comprehensive evaluation, measurements are conducted exclusively in a simulation environment, where field-of-view maps are generated, detection ranges are analyzed, and perception reliability is assessed under various conditions. The results provide insights into the optimal sensor arrangement that minimizes blind spots, maximizes sensing accuracy, and enhances the efficiency of the autonomous vehicle’s perception architecture.

Open Access: Yes

DOI: 10.3390/engproc2025113027

Different Breeding Values Under Uniform Environmental Condition for Milk Production Yield Traits in Holstein-Friesian Cows

Szabolcs Bene László Bognár Zsolt J. Kőrösi Ferenc Szabó István Anton

Publication Name: Animals

Publication Date: 2025-01-01

Volume: 15

Issue: 1

Page Range: Unknown

Description:

In this study, 1,616,549 Holstein-Friesian females were genotyped for genomic evaluation of genetic merit (BVGenomic). Genotyping was performed using the EuroGenomics MD v3.0 chipset on the Illumina microarray scanner platform operated by an accredited Illumina laboratory. In addition, international and national reference populations were used for traditional BLUP breeding value (BV) estimation for both individuals (BVBLUP) and parents (BVPedigree). A single-step BLUP animal model was used for this estimation. A sample of 190 first lactation progeny cows from a single herd, reared and kept under consistent environmental conditions, was used to validate the three types of BV estimation methods. Correlation and regression analysis were used to study the association between the phenotypic performance and the results of three different estimation models. The average production of the 305-day standard lactation was 10,910.5 kg milk, 397.86 kg butterfat and 365.33 kg protein. Comparative analyses showed that BVBLUP had the highest accuracy, followed by BVGenomic, while BVPedigree was the least reliable, R2 = 0.37 to 0.48; 0.09 to 0.23; 0.02 to 0.06, respectively.

Open Access: Yes

DOI: 10.3390/ani15010051

Three models of sovereignty-protection

Péter Smuk Tamara Álvarez Robles

Publication Name: Rechtskultur

Publication Date: 2024-01-01

Volume: Unknown

Issue: Unknown

Page Range: 515-533

Description:

This paper discusses three approaches of what we call sovereignty and the protection thereof. The classical concept of sovereignty needs a multi-layered analysis in order to understand recent developments in different legal-political discourses and narratives. We suggest to take into consideration the following layers that are interconnected in various ways. The first aspect is the classical sovereignty concept of the 19th–20th centuries, which, after the consolidation of nation states, acts against attacks or interventions targeting the constituent elements and functions of the state (territory, population, legitimate government-jurisdiction). This model uses the mechanisms of the United Nations in addition to the classical nation-state defence and diplomatic instruments. Another layer notes the developments in Euro-Atlantic integration: recently we observe the sovereignty disputes within the European Union fuelled by the identity-discourse. The third dimension understanding sovereignty disputes is to characterise operations in cyberspace in the 21st century, targeting not only defence and critical infrastructure, but also democratic discourses. In this paper, we will review the main features of these sovereignty layers, with a particular focus on the lessons to be drawn from supranational and cyberspace disputes. The EU Member States’ toolbox, together with recent developments in sovereignty, identity and democracy protection, will be assessed in the light of European constitutional standards.

Open Access: Yes

DOI: DOI not available

Gaussian-Process-Based Adaptive Tracking Control With Dynamic Active Learning for Autonomous Ground Vehicles

R. Toth Tamas Peni Kristóf Floch

Publication Name: IEEE Transactions on Control Systems Technology

Publication Date: 2026-01-01

Volume: 34

Issue: 2

Page Range: 800-812

Description:

This article proposes an active-learning-based adaptive trajectory tracking control method for autonomous ground vehicles to compensate for modeling errors and unmodeled dynamics. The nominal vehicle model is decoupled into lateral and longitudinal subsystems, which are augmented with online Gaussian processes (GPs) using measurement data. The estimated mean functions of the GPs are used to construct a feedback compensator, which, together with a linear parameter-varying (LPV) state feedback controller designed for the nominal system, gives the adaptive control structure. To assist exploration of the dynamics, the article proposes a new, dynamic active learning method to collect the most informative samples to accelerate the training process. To analyze the performance of the overall learning tool-chain provided controller, a novel iterative, counterexample-based algorithm is proposed for calculating the induced L2 gain between the reference trajectory and the tracking error. The analysis can be executed for a set of possible realizations of the to-be-controlled system, giving a robust performance certificate of the learning method under variation of the vehicle dynamics. The efficiency of the proposed control approach is shown on a high-fidelity physics simulator and in real experiments using a 1/10 scale F1TENTH electric car.

Open Access: Yes

DOI: 10.1109/TCST.2025.3632358

The Impact of Social Media Relationships on e-WOM in Syria and Hungary

Anikó Tompos Jawad Abo Khair

Publication Name: Review of Applied Socio Economic Research

Publication Date: 2023-06-29

Volume: 25

Issue: 1

Page Range: 52-65

Description:

Cultural values play a crucial role in the formation of individuals’ behaviour. With the emergence of social networking sites, which have formed a parallel world to the real world, the behaviour of individuals and their motives to engage in electronic word of mouth (eWOM) on social media platforms has become extremely important for brands. Due to a relative lack in studies focusing on the cultural differencebased impact of social relationships on eWOM in social media, the present study seeks to address this gap as its broad objective is to investigate the effect of social relationship variables on eWOM in social media by comparing two different cultures, namely Syria and Hungary in order to explore whether social relationships exert a more significant impact on eWOM in a collectivistic society than in an individualistic one. An explanatory research design was adopted and the data was collected by means of a questionnaire survey. The final sample included 113 Syrian and 90 Hungarian respondents, all of them aged 35 or below. It was found that tie strength among young adults has a more positive impact on eWOM in Syria than in Hungary, while no homophily impact was found on eWOM in either. Regarding the other social relationship variables examined in the study (trust, normative and informational influences), the results showed that they do not have a more positive impact on eWOM in Syria than in Hungary. The research is believed to have contributed to previous investigations on the impact of social relationships on eWOM via social media by providing insights into the role of a cultural value dimension in determining the extent to which individuals are affected by their cultural background, whether collectivistic or individualistic, when they interact in social media platforms. At the same time, it is acknowledged that the study has limitations thus future examinations are necessary.

Open Access: Yes

DOI: 10.54609/reaser.v25i1.335

Optimizing Sustainability in Bridge Projects: A Framework Integrating Risk Analysis and BIM with LCSA According to ISO Standards

Rana Ahmad Maya Dema Munef Ahmad László Gáspár

Publication Name: Applied Sciences Switzerland

Publication Date: 2025-01-01

Volume: 15

Issue: 1

Page Range: Unknown

Description:

Building bridges sustainably is essential for advancing infrastructure development and ensuring long-term environmental, social, and economic viability. This study presents a framework that integrates risk management strategies and Building Information Modeling (BIM) with Life Cycle Sustainability Assessment (LCSA) standards to enhance bridge project sustainability. Through a targeted survey, the study evaluates risks across bridge lifecycle phases, identifying the main processes that significantly impact sustainability. Using the Pareto Principle, the framework prioritizes these processes and associated risks, guiding the creation of targeted improvement guidelines aligned with ISO 9001:2015, BIM, and LCSA standards, which support high quality and efficiency. The results reveal that 38 of 55 identified risks account for 80% of the lifecycle impact, and they include the majority of those derived from international standards, underscoring their significance in sustainability efforts. Additionally, 36 of 47 main processes are subject to 80% of the impact from these vital risks, highlighting phases like Construction and Supervision as priority areas for intervention. By linking specific risks to each process within these phases, the study outlines essential guidelines and strategic measures, ensuring a focused approach to sustainable bridge development that aligns with international standards and maximizes lifecycle sustainability outcomes.

Open Access: Yes

DOI: 10.3390/app15010383

New species and records of Oripodoidea (Acari, Oribatida) from Mexico

Sergey G. Ermilov Jenő Kontschán

Publication Name: Systematic and Applied Acarology

Publication Date: 2023-06-28

Volume: 28

Issue: 6

Page Range: 1109-1120

Description:

Twelve species, 10 genera and five families of Oripodoidea (Oribatida) are registered from leaf litter in secondary semi-evergreen forest in Quintana Roo, Mexico; of them, five species (Nasobates spinosus, Mucrobates fissuratus, Scheloribates milleri, S. (Perscheloribates) minusculus, Protoribates paracapucinus) are recorded for the first time in this country; two species (Muliercula bilineata, Peloribates (Peloribatodes) roynortoni) are found for the first time in the Neotropical region. Two new species - Scheloribates (Perscheloribates) mexicoensissp. nov. (Scheloribatidae) and Setoxylobates palaciosvargasisp. nov. (Haplozetidae) - are described. An identification key to the known species of Scheloribates (Perscheloribates) from the Neotropical region is provided.

Open Access: Yes

DOI: 10.11158/saa.28.6.8

Investigation of flame retardant RPET foam

V. A. Szabó Gabor Dogossy

Publication Name: Periodica Polytechnica Mechanical Engineering

Publication Date: 2020-01-01

Volume: 64

Issue: 1

Page Range: 81-87

Description:

The use of plastics in the food and the packaging industries continuously is increasing. In these areas of use the product's life cycle is short, therefore it quickly turns into waste. The polyethylene terephthalate (PET) - the material that is used as beverage containers - are the material with the greatest environmental load. The physical recycling of PET bottles in large quantities was the research goal. During the work with the help of chemical foaming a closed cell structural foam from PET bottle was produced. The research was carried out with upcycling using chain extender and impact modifier additives. For industrial use a bromine-based flame retardant was used and excellent flame retardancy was achieved. Based on the results obtained, the material previously managed as waste, with the appropriate treatment can be involved into the manufacturing of new products.

Open Access: Yes

DOI: 10.3311/PPme.14556