Search in Publications

Found 6327 publications

Reducing resource use and emissions by integrating technology and policy solutions

Raymond R. Tan Yee Van Fan Petar Sabev Varbanov Ferenc Friedler

Publication Name: Clean Technologies and Environmental Policy

Publication Date: 2022-01-01

Volume: 24

Issue: 1

Page Range: Unknown

Description:

No description provided

Open Access: Yes

DOI: 10.1007/s10098-021-02237-2

Processing FT-IR data for facilitated oil condition monitoring

András Lajos Nagy Adam Agocs Zsolt Tabakov

Publication Name: 2022 IEEE 1st International Conference on Cognitive Mobility Cogmob 2022

Publication Date: 2022-01-01

Volume: Unknown

Issue: Unknown

Page Range: 47-50

Description:

The physical and chemical condition of a lubricant plays a vital role in the long-term operability of engineering systems. Hence, oil condition monitoring of high-value and heavy-duty equipment is a common practice across numerous industries. However, this practice is not utilized on a regular basis for passenger cars, and car fleets. For general automotive purposes, a simpler time and mileage-based approach is favored. This approach employs fixed oil change intervals, that are based on average usage, with more recently produced vehicles only slightly modifying these intervals by monitoring oil temperatures over time. With rising environmental concerns and increasing focus on systemic approaches, reducing waste production is gaining importance. Being aware of lubricant condition opens up the opportunity to optimized, condition-based oil changes, that can help reduce waste by elongating the service life of engine oils. This study presents a methodology of processing FT-IR data that allows for a simplified decision making regarding the prolonged applicability of used engine oil. The presented method can be implemented as a step of planned maintenance during scheduled service at a repair shop, as well as a regular investigation by fleet operators.

Open Access: Yes

DOI: 10.1109/CogMob55547.2022.10117798

Two sides of one medal: Arable weed vegetation of Europe in phytosociological data compared to agronomical weed surveys

Alicia Cirujeda Valerijus Rašomavičius Michael Glemnitz Jana Bürger Guillaume Fried Jevgenija Ņečajeva Lena Ulber Silvia Fogliatto Michaela Kolářová Eva Hernández Plaza Matthias Schumacher Bärbel Gerowitt Gyula Pinke Sandrine Petit Christoph Redwitz Helen Metcalfe Denise Fu Dostatny Filip Küzmič José Luis González-Andújar Zdeňka Lososová Francesco Vidotto Erwin Bergmeier Milan Chytrý Jordi Izquierdo Florian Jansen Urban Šilc

Publication Name: Applied Vegetation Science

Publication Date: 2022-01-01

Volume: 25

Issue: 1

Page Range: Unknown

Description:

Questions: Two scientific disciplines, vegetation science and weed science, study arable weed vegetation, which has seen a strong diversity decrease in Europe over the last decades. We compared two collections of plot-based vegetation records originating from these two disciplines. The aim was to check the suitability of the collections for joint analysis and for addressing research questions from the opposing domains. We asked: are these collections complementary? If so, how can they be used for joint analysis?. Location: Europe. Methods: We compared 13 311 phytosociological relevés and 13 328 records from weed science, concerning both data collection properties and the recorded species richness. To deal with bias in the data, we also analysed different subsets (i.e., crops, geographical regions, organic vs conventional fields, center vs edge plots). Results: Records from vegetation science have an average species number of 19.0 ± 10.4. Metadata on survey methodology or agronomic practices are rare in this collection. Records from weed science have an average species number of 8.5 ± 6.4. They are accompanied by extensive methodological information. Vegetation science records and the weed science records taken at field edges or from organic fields have similar species numbers. The collections cover different parts of Europe but the results are consistent in six geographical subsets and the overall data set. The difference in species numbers may be caused by differences in methodology between the disciplines, i.e., plot positioning within fields, plot sizes, or survey timing. Conclusion: This comparison of arable weed data that were originally sampled with a different purpose represents a new effort in connecting research between vegetation scientists and weed scientists. Both collections show different aspects of weed vegetation, which means the joint use of the data is valuable as it can contribute to a more complete picture of weed species diversity in European arable landscapes.

Open Access: Yes

DOI: 10.1111/avsc.12460

Risk Management for Cold Supply Chain: Case of a Developing Country

Laszlo Vasa Dragan Pamucar Yousaf Ali Amin Ullah Khan

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2022-01-01

Volume: 19

Issue: 8

Page Range: 161-185

Description:

Cold Supply Chain (CSC) involves temperature-controlled activities in the overall process, ranging from the raw material storage to the final supply of the products to the consumers. The activities involved are easily exposed to risks such as temperature and humidity, equipment failure and quality risk to name a few. Such sensitive processes need proper risk mitigation strategies, to ensure the effective functioning of the overall CSC. For this purpose, the current research conducted a vigorous literature review and identified 40 relevant risks related to CSC in a developing country. The risks were analyzed using Failure Mode and Effect Analysis (FMEA)-Risk Priority Number (RPN) technique to shortlist the significant risks. The significant risks were then subjected to the Full Consistency Method (FUCOM) for prioritization. The results concluded, contamination of food, temperature and humidity and quality as the top-three risks that can be dangerous for the overall cold supply chain. To overcome these risks, the study recommends the proper implementation of traceability systems and Radio Frequency Identification (RFID) systems. Furthermore, employing the latest technologies and efficient personnel training can also help overcome these risks. Such an application of the study in the case of a developing country, Pakistan's CSC forms to be the first of its kind. Furthermore, the application of FMEA-RPN along with the FUCOM technique in the scenario of CSC risk management forms the novelty of this research study.

Open Access: Yes

DOI: DOI not available

Evaluating the Return Volatility of Cryptocurrency Market: An Econometrics Modelling Method

Laszlo Vasa Ashutosh Kolte Avinash Pawar Jewel Kumar Roy Imre Vida

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2022-01-01

Volume: 19

Issue: 5

Page Range: 107-126

Description:

Cryptocurrency is the blockchain financial technology used for transactions in financial institutions and exchanges. Bitcoin has attracted much coverage from investors and commentators as it represents the maximum market capitalization on a crypto-currency exchange. The study aims to determine the correlation between the daily log–returns and to understand the tendencies in the cryptocurrency market instability of Bitcoin, Litecoin, XRP, Nxt, Dogecoin, Vertcoin, DigiByte, DASH, Counterparty, and MonaCoin. The correlation among the selected cryptocurrencies exists in the study. The analysis is focused primarily upon reference information from the preserved servers of cryptocurrency websites and finance.yahoo.com. This research assesses regular details on the Logarithmic return of Bitcoin, Litecoin, XRP, Nxt, Dogecoin, Vertcoin, DigiByte, DASH, Counterparty, and MonaCoin for a timeframe spanning from October 01st, 2014, to April 30th, 2020. From 131 cryptocurrencies, we considered only 10 Cryptocurrencies due to the availability of data after October 2014. Where there was insufficient information, there were average results determined from preceding and succeeding data. Findings demonstrate that there is GARCH modelling of cryptocurrencies against Bitcoin. Litecoin, XRP, Nxt, Dogecoin, Vertcoin, DigiByte, DASH, Counterparty, and MonaCoin; variability values throughout the duration had a significant effect on the updates from Bitcoin returns. We believe that it helps create information and resources that are valuable to practitioners and scholars who research and form cryptocurrency markets in the future.

Open Access: Yes

DOI: 10.12700/APH.19.5.2022.5.6

Handheld 3D Scanning and Image Processing for Printing Body Parts - A Workflow Concept and Current Results

Anna Sudar Gyorgy Wersenyi Thomas Wittenberg

Publication Name: 2022 IEEE 1st International Conference on Internet of Digital Reality Iod 2022

Publication Date: 2022-01-01

Volume: Unknown

Issue: Unknown

Page Range: 61-68

Description:

The combination of current technical possibilities of handheld 3D scanning devices, 3D data analysis and interaction, and novel 3D bioprinting technologies has opened the way to develop workflows and scenarios for the generation of personalized human prosthesis. Specifically, using the human ear as one example to develop a cost-effective chain of methods and tools, the above mentioned combined and interacting technologies can be used to understand and demonstrate the possibilities for rapid bio prototyping. Production workflows for personalized soft-material bio-prosthesis gain significance in reconstructive and plastic surgery. This paper introduces a workflow concept, presents a list of appropriate and accessible state-of-the-art handheld scanners, followed by an image processing solution based on the MeshLab application and printing first prototypes.

Open Access: Yes

DOI: 10.1109/IoD55468.2022.9987113

'Everyday Judicial Populism' in Hungary

Mátyás Bencze

Publication Name: Review of Central and East European Law

Publication Date: 2022-01-01

Volume: 47

Issue: 1

Page Range: 37-59

Description:

Scholarly works on judicial populism tend to concentrate on the landmark judgments of constitutional courts and apex courts. Nonetheless, the examination of the activities of ordinary courts is of great importance as they shape the lives of citizens and can strengthen or curb populist politics. In this paper I analyze a phenomenon emerging in the adjudication of Hungarian ordinary courts which can be labelled 'everyday judicial populism'. Based on case studies and empirical scrutiny I argue that the political populism of the Hungarian government has both a direct and an indirect, but clearly detectable, impact on judicial practice. As regards the latter, the government can manipulate (through its media) public opinion in certain court cases, and judges take this opinion - as the 'vox populi' - into consideration in their decision-making. At the end of the paper I examine the institutional conditions that have facilitated the emergence of judicial populism. 2022

Open Access: Yes

DOI: 10.1163/15730352-bja10062

Auditory and Haptic Solutions for Access and Feedback in Internet of Digital Reality Applications

Adam Csapo Gyorgy Wersenyi

Publication Name: 2022 IEEE 2nd Conference on Information Technology and Data Science Citds 2022 Proceedings

Publication Date: 2022-01-01

Volume: Unknown

Issue: Unknown

Page Range: 319-323

Description:

The concept of Internet of Digital Reality (IoD) was introduced as the next level organization of cognitive entities following the concept of the Internet of Things (IoT) and Internet of Everything (IoE). As virtual-immersive environments are a fundamental component of IoD which allow human and non-human entities to interact in real time, the ability a wide range of communication modalities is crucial. This paper briefly presents the concept of IoD together with an overview of various I/O solutions for human users, with a focus on research directions and (re)emerging technologies in the near future.

Open Access: Yes

DOI: 10.1109/CITDS54976.2022.9914161

Investigation of the Effects of Thermit Welding on the Mechanical Properties of the Rails

Szabolcs Fischer B. Kocsis Dóra Harangozó Vivien Barna András Brautigam

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2022-01-01

Volume: 19

Issue: 3

Page Range: 37-49

Description:

This current paper deals with the investigation of the variation of the hardness of the rail steel material in the heat-affected zone (HAZ) of a rail joint made by thermit welding (TW). The tested rail is a normal R260 type rail steel category; its production date is 1977, the rolling mill was Diosgyor (Hungary), rail profile is MÁV 48.5. This rail has not been in railway track before the test. The authors performed hardness tests on the rail head’s surface even after the rail welding, as well. After the welding and hardness tests, the rail joint was cut with +/–200 mm by a rail cutter and transported to the laboratory. Water jet cutting was applied to shape six longitudinal direction slices with five vertical cutting lines from the rail piece’s head. The slices’ length was 400 mm, the width of these slices was approx. 10 mm; the TW rail joint was in the mid-point of the slices. Micro-Vickers (HV10) hardness tests were executed on these slices, in the –150…+150 mm interval lengthwise and in the 3, 6, and 10 mm depth points below the rail head’s top surface. As a result, the authors received a very detailed hardness functions of the HAZ of rail joint made by TW. These variation functions were compared to the official Elektrothermit’s SoW-5 hardness tests’ results. It can be concluded that the variation of the hardness of rail steel in the area of the HAZ correlated with the Elektrothermit’s results; however, there were some critical points where significant differences were able to be found. The highest deviation was concluded in 50 mm distance measured from the axis of welded rail joint. The authors gave possible valuable explanations for these phenomena.

Open Access: Yes

DOI: DOI not available