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Found 6342 publications

GPS Based Navigation and Mobile Base Station of a Mobile Robot Platform

Rudolf Krecht Norbert Boros Dániel Eredits

Publication Name: Chemical Engineering Transactions

Publication Date: 2023-01-01

Volume: 107

Issue: Unknown

Page Range: 385-390

Description:

One of the central challenges of today is to increase the degree of automation of the available systems and equipment in a sustainable way. This paper presents the development of an outdoor mobile robot platform navigation method, including an on-board unit and a mobile base station to support the operation of the ZalaZone Automotive Proving Ground in Zalaegerszeg, Hungary, by precise, automated deployment of traffic cones. Currently, traffic cone handling is a time- and labor-intensive job. Its automation saves a significant amount of human resources. As a first step, the technical requirements of the problem have been defined. Then, the navigation system that met the pre-defined requirements has been implemented. This paper presents the detailed development of this navigation system, including a description of the test phases as well. As part of the development process, the operation of a Global Navigation Satellite System (GNSS) receiver corrected by Real-Time Kinematic (RTK) is presented, supported by a small, low-power mobile base station, followed by a description of the applied hardware and software components, alongside with the alignment and further development of these components to achieve centimeter-accurate positioning. The Network Transport of Radio Technical Commission for Maritime Services (RTCM) via Internet Protocol (NTRIP) server facilitates the communication between the onboard unit and the base station via a 5G network. This work is continued by a detailed description of the autopilot system on the robotic platform, including the tools and software used for this purpose. The calibration process of the navigation system is described as well. Finally, the results and observations gained during the test are summarized and analyzed. These results have shown that the addition of an RTK system has highly increased the accuracy of a general GNSS receiver. In addition, these results underline the crucial role of 5G networks in the case of automated mobile applications.

Open Access: Yes

DOI: 10.3303/CET23107065

The Theoretical Framework of Sustainable Financial Development Through Literature Outlook

Katalin Czakó István Szalai

Publication Name: Chemical Engineering Transactions

Publication Date: 2023-01-01

Volume: 107

Issue: Unknown

Page Range: 595-600

Description:

Sustainable development seeks to strike a balance between economic growth, social well-being and environmental protection. It should be integrated into financial development as well. As a consequence, banks are realising changes in their roles, decision-making, and operations. This paper aims to introduce a structured literature outlook about the different interpretations of sustainable financial development (SFD) on micro and macro levels. The literature mapping is focusing on three main contexts. The basic assumption of the paper is that it is crucial to emphasise the importance of country-level economic growth, the indicators used to determine the level of financial development and the resilience of the financial intermediary actors. As a consequence, the paper represents some existing results in terms of these three contexts. This gives the future basis for the efficient interpretation of sustainable financial development aspects in the operation and the decision-making processes of financial institutions and also for policy-making institutions on the macro-level.

Open Access: Yes

DOI: 10.3303/CET23107100

Traffic Dependent Pavement Management Algorithm

K. Ambrus-Somogyi András Bakó Lajos Tóth

Publication Name: 2006 IEEE International Conference on Computational Cybernetics Iccc

Publication Date: 2006-12-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

The Road Management Systems (and the PMS) usually do not take into consideration the future traffic change. The maintenance and rehabilitation actions and the development of the road network structure and the changing traffic structure modify the amount of the traffic on the road section. The deterioration process depends on mostly the volume of the traffic. That is why it is important to take into consideration the change of the traffic volume during the planning time horizon. In the lecture some techniques are shown which handle this problem: in multiperiod, long time model at each planning period the traffic volume change is take into consideration.In ranking models the problem could be handled and solved. In the case of one period Markov stabile model there is nothing to do. In the multiperiod model the problem could be solved also.

Open Access: Yes

DOI: 10.1109/ICCCYB.2006.305740

Trust and communication in the context of leaders and employees

Márta Konczos Szombathelyi Edit Bányai Norbert Sipos Gabriella Kuráth Tímea Venczel-Szakó

Publication Name: Journal of International Studies

Publication Date: 2023-01-01

Volume: 16

Issue: 3

Page Range: 159-174

Description:

The article deals with the topic of communication and trust in leadership which affect the success of cooperation and organizational performance. The paper summarizes the theoretical basis of trust and communication and examines what leaders must do to develop them and achieve the expected results and outcomes. The study focuses on Zenger and Folkman’s model related to the two aspects of leaders’ qualities: warmth and professional competence. The empirical analysis is conducted on a dataset obtained from a Hungarian nationwide omnibus study where 999 responses were collected. The methodology is based on the application of Confirmatory Factor Analysis and Binary Logistic Regression. The research confirmed that trust and communication are significant factors of leadership success, whereas warmth is measured to have twice as much importance as professional competence in building the former two. This is the first study where the Zenger and Folkman’s model is controlled in a Central and Eastern European country in the context of leaders and employees.

Open Access: Yes

DOI: 10.14254/2071-8330.2023/16-3/9

Mechanical property evaluation of closed and open-cell foam structures with finite element method

Ibolya Zsoldos K. Kulcsár J. Kónya

Publication Name: Iop Conference Series Materials Science and Engineering

Publication Date: 2020-08-25

Volume: 903

Issue: 1

Page Range: Unknown

Description:

In this study, different lattice structures were examined with finite element method. Mechanical stress evaluations were performed on porous structured lattices that consisted simple cubic, face-centered cubic, body-centered cubic, and diamond unit cells. Finite element method simulations showed that structured foams with open and closed cells produced significantly different stress levels depending on their packing fraction. The aim of this study is to provide a basis for the design of an implant system that would promote the process of osseointegration.

Open Access: Yes

DOI: 10.1088/1757-899X/903/1/012010

The Realization of a Circular Economy in the Construction Industry and Its Adaptation to EU Standards in Hungary

Adrienn Buruzs K. Kozma

Publication Name: Chemical Engineering Transactions

Publication Date: 2023-01-01

Volume: 107

Issue: Unknown

Page Range: 535-540

Description:

Transforming the linear economy into a circular one in the construction sector is not an easy task. Such a radical change entails a major transformation of the current production and consumption patterns, which in turn will have a significant impact on the economy, the environment, and society. The European Commission sees great potential in the recycling and reuse of construction and demolition waste (CDW) and has also emphasised the importance of this waste stream in its directives on the circular economy. This paper first presents the concept of CDW and its regulatory characteristics. It then introduces the types and sources of CDW. Third, based on an analysis of the literature, the paper identifies the possible links between the CDW and the circular economy and current trends and practices of recovery, reuse, and recovery. Finally, through the examples presented, it gives an overview of the current situation and trends in Hungary and makes recommendations for future development opportunities for the practitioners to help them adapt to recent changes. The options for doing this are important, but the problems that may hinder this process also need to be examined. In this article, the author seeks to find answers to this question.

Open Access: Yes

DOI: 10.3303/CET23107090

Experimental Investigation of Tribological Properties of Two Fully Formulated Engine Oils with Additional Nanoscale Spherical Zirconia Particles

Rajmund Kuti D. Tóth I. Szabó

Publication Name: Lubricants

Publication Date: 2022-10-01

Volume: 10

Issue: 10

Page Range: Unknown

Description:

Decreasing harmful emissions of vehicle engines is becoming more and more challenging due to stricter standards. A possible solution is to improve the tribological attributes of lubricants, which can be achieved through the application of appropriate additives. According to preliminary studies conducted by the authors, ZrO2 (zirconium-dioxide) nano-sized ceramic particles as lubricant additives have overwhelmingly positive tribological attributes in the presence of non-metallic superficial materials. Additive concentration, as well as cross-effects with other additives were investigated in order to determine a formulation resulting in optimal tribological attributes. In this paper, the experimental investigation of ZrO2 nano-ceramic powder as a lubricant additive is presented. The tribological performance of individually samples were experimentally investigated on a ball-on-disc translational tribometer. The experiments revealed an optimal additive content of 0.3 wt%. Increasing the quantity of additives further ruined friction and wear properties of the examined tribological system.

Open Access: Yes

DOI: 10.3390/lubricants10100246

Gender and Power: Financial Independence and Women's Relational Empowerment in the Global South

Daniel Wheatley Jessica Lichy Loga Devi Balla Soupramanien Melina Doargajudhur Soujata Rughoobur-Seetah Zuberia Hosanoo

Publication Name: Gender Work and Organization

Publication Date: 2026-07-01

Volume: 33

Issue: 4

Page Range: 1283-1297

Description:

This study adopts a positive and contextually grounded representation of married women in Global South (GS) countries through the theory of gender and power (TGP) and Kabeer's empowerment framework, to examine factors driving financial independence (FI) and empowerment among women in Mauritius and Zimbabwe. Drawing on 55 in-depth interviews with married women (28 in Mauritius and 27 in Zimbabwe), findings indicate that gendered power relations and institutional forces are pivotal in shaping empowerment for married women. Three interconnected themes emerged: “societal and institutional factors,” “context-embedded financial independence and autonomy,” and “women's relational empowerment.” Theoretically, we intersect Kabeer's empowerment framework with the TGP to illustrate how FI operates at the nexus of resources, agency, gendered power relations, and structural constraints, both aligning with and challenging universalized assumptions in gender, development, and empowerment research. Empirically, the paper advances scholarship by providing nuanced insights into empowerment processes within under-researched GS contexts.

Open Access: Yes

DOI: 10.1111/gwao.70123

Does Mineral Resources Utilization and Governance Policy Induce Income Inequality: Contextual Findings from Historical Data of China

Laszlo Vasa Chen Wang Xiaoyi Ren

Publication Name: Politicka Ekonomie

Publication Date: 2025-01-01

Volume: 73

Issue: 5

Page Range: 891-925

Description:

In the current literature strand, most of the literature is devoted to the role played by mineral and governance policies in environmental quality. However, their criticality in income inequality is mainly overlooked by scholarly works. This research investigated the nexus of mineral and governance policies with income inequality while exploring the importance of per capita income, health expenditure, and poverty. Covering the extended period from 1984Q1 to 20223Q4 in the case of China, this research confirms the presence of long-run equilibrium association between variables. Due to the non-normal data distribution, this research uses quantile regression and a series of robust non-parametric and parametric approaches. The research concludes that mineral resources, health expenditure, governance efficiency, regulatory quality, and poverty headcounts significantly reduce income inequality. Wealth from mineral and health expenditures substantially improves the living standards of the general public. The governance policies are also beneficial in equal wealth distribution of the country. On the contrary, per capita income and government stability are the region’s leading factors of income inequality. Based on the predicted results, this research recommends improved minerals management, strengthening of governance institutions and policies, and enhancement in health expenditure to tackle the issue of income inequality.

Open Access: Yes

DOI: 10.18267/j.polek.1463