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Found 6414 publications

Searching possible accident black spot locations with accident analysis and gis software based on GPS coordinates

Csaba Koren Attila Borsos Pál Hegyi

Publication Name: Pollack Periodica

Publication Date: 2017-12-01

Volume: 12

Issue: 3

Page Range: 129-140

Description:

There are several methods for the analysis of road accidents in a road network. In Hungary from 2011 GPS coordinates are used to identify the location of personal injury accidents. This method significantly improves the display of locations of accidents on the map, which can be then analyzed using GIS tools. Accident black spots are the most dangerous places in road networks identified by the density of the accidents in the network. One of the analysis methods is the accident density searching. The methods and algorithms used in some software may show differences in relation to one another. The aim of this research is comparing two applications by investigating the local road network in Györ. The analysis was made using the WEB-BAL accident analysis software using the density-based spatial clustering of applications with noise procedure and the QGIS software using the kernel density estimation method. The former is the official accident database and online software used for accident investigations and the latter is an open source geographic information system. The results are visualized in accident density plots and black spot maps.

Open Access: Yes

DOI: 10.1556/606.2017.12.3.12

Design of load torque and mechanical speed estimator of PMSM with unscented Kalman filter-An engineering guide

Karol Kyslan Frantisek Durovsky Viliam Fedak Viktor Slapak Krisztián Horváth

Publication Name: International Conference on Electical Drives and Power Electronics

Publication Date: 2017-11-27

Volume: 2017-October

Issue: Unknown

Page Range: 297-302

Description:

This paper presents the design of Unscented Kalman Filter (UKF) for estimation of state space variables of permanent magnet synchronous machine (PMSM). The UKF is shown together with the field oriented speed control. At first, the position and the speed of PMSM are measured, and UKF is used only for a load torque estimation. It is indicated how differences in sampling time of the speed and the current loop affects overall estimation performance. Subsequently, speed sensorless performance of the UKF with the same parameters is shown for comparison. Designed filter is verified only by Matlab simulation.

Open Access: Yes

DOI: 10.1109/EDPE.2017.8123249

‘Law Is Not Politics’: The Role of the Liberal View on Law in the Rise of “New Populism”

Mátyás Bencze

Publication Name: Law Populism and the Political in Central and Eastern Europe

Publication Date: 2023-01-01

Volume: Unknown

Issue: Unknown

Page Range: 166-183

Description:

While it is widely accepted that the recent democratic decline in Hungary can be traced back to many factors (e.g., political, social, economic, etc.), it may be worthwhile to focus on and analyse one of them in particular: the fact that the dominance of the liberal discourse on the law between 1990 and 2010 led to jurists, democratic politicians, and other intellectuals becoming exposed to the attacks of neo-authoritarian forces. In this chapter, I examine one of the characteristics of the liberal theory of law which facilitated the spread of a conviction among democratically thinking people with an interest in public affairs. This conviction is based on the assumption that there is a sharp boundary between law and politics, and following from that, that neutral legal institutions, by relying solely on the law, are able to defend the rights of the citizens against any political attack. Believing in this myth, democrats did not appreciate the true weight of the political nature of legal decision making, and the undemocratic forces were able to capitalise on their naïvety.

Open Access: Yes

DOI: 10.4324/9781032624464-8

Investigating the Ecological Footprint of Deep Mixing

Edina Koch Zoltán Major Szigeti Cecília

Publication Name: Chemical Engineering Transactions

Publication Date: 2023-01-01

Volume: 107

Issue: Unknown

Page Range: 349-354

Description:

In railway construction practice, we are increasingly faced with the problem of having to pass our new lines through areas with unfavorable subsoil conditions or with the need to reinforce the substructure of our existing lines due to increasing traffic demands (speed, axle load). The low strength, high compressibility, and low permeability of unfavorable subsoil will result in stability problems and prolonged consolidation with extremely high settlements, respectively. One of the effective technologies to counter the geotechnical problems is the deep mixing. The technology requires the addition of a binder (cement, lime) to the local soils. These materials have a high installed CO2 emission, thus significantly increasing the ecological footprint of infrastructure development. Due to the increasing demands on reducing CO2 emissions, secondary raw materials, e.g., fly ash or slag, have been increasingly prioritized. The study reports the methodology for calculating the ecological footprint of deep-mixing as an embankment foundation. Based on a simple case, the effect of different cement content (5 and 8%), and the application of slag and fly ash as a secondary raw material is analyzed, and the ecological footprint is calculated separately. The results show that the ecological footprint of deep mixing can be drastically reduced; under the conditions of the study, the reduction compared to clean cement is 40% for slag stabilization and 50% for fly ash.

Open Access: Yes

DOI: 10.3303/CET23107059

Corporate carbon footprint analysis in practice – With a special focus on validity and reliability issues

Gabor Harangozo Szigeti Cecília

Publication Name: Journal of Cleaner Production

Publication Date: 2017-11-20

Volume: 167

Issue: Unknown

Page Range: 1177-1183

Description:

As a yield of efforts in the international climate policy and emerging consumer awareness there is a growing interest for the quantification of corporate level carbon footprints. As a consequence, there have been numerous initiatives, guidelines and calculation methods emerged recently to be able to quantify company level direct and indirect greenhouse gas emissions. Most of them are based on the philosophy and classification of the Greenhouse Gas Protocol. This paper intends to provide a comparison of freely available online corporate level carbon footprint calculators with a novelty value of addressing their validity and reliability. Validity here refers to the issue whether different calculators cover the same or similar aspects or scopes of the corporate carbon footprint, while reliability addresses the question whether different calculators deliver the same or similar result if we use the same input data. Based on the example of an imaginary enterprise, we argue that validity is partly achieved, while reliability of the calculators is relatively low. This means that online corporate carbon calculators can be useful to provide a first insight for companies into their carbon footprints and they can also be useful for temporal comparisons at the level of one company (if the activity of the company is not too complex.) However, these calculators do not seem to be very appropriate for comparisons among different companies or with external benchmarks.

Open Access: Yes

DOI: 10.1016/j.jclepro.2017.07.237

Comparison of different linux containers

Akos Kovacs

Publication Name: 2017 40th International Conference on Telecommunications and Signal Processing Tsp 2017

Publication Date: 2017-10-19

Volume: 2017-January

Issue: Unknown

Page Range: 47-51

Description:

The new generation of virtualization is containerization. In this paper we measured the most common container techniques to determinate the performance of these techniques regarding computing power and network performance with industry standard measurement applications. We used these measurement results to compare them with native performance without any container techniques and with the Linux standard virtualization KVM performance. For the first time, this paper also measures the performance of the Singularity container system, which is a new approach of HPC systems container usage.

Open Access: Yes

DOI: 10.1109/TSP.2017.8075934

The ectoparasitic burden and prevention of some huntable cloven hoofed animals

Gustav Ingo Struck Egri Borisi

Publication Name: Tierarztliche Umschau

Publication Date: 2017-10-01

Volume: 72

Issue: 10

Page Range: 378-386

Description:

This review is an attempt to show the worldwide ectoparasitic burden in deer and antilopes with the aid of some case samples. Animals kept in zoos, lodges/ breeding farms and also in the wild, can considerable suffer and die under the burdens of parasites. The environment plays at this certainly an important role, too. Grooming and mutulism (a symbiotic relationship between two species of organism where both organism benefit from the association), vegetation and climate are only some of these factors. Not least, it should be also mentioned, that certain diseases, which can be transferred by parasites, can not only have intraspecific, but also extraspecific transmission possibilities.

Open Access: Yes

DOI: DOI not available

Getting the priorities straight: resource use, emissions, impacts, avoidable/unavoidable waste

Petar Sabev Varbanov

Publication Name: Clean Technologies and Environmental Policy

Publication Date: 2023-12-01

Volume: 25

Issue: 10

Page Range: 3129-3130

Description:

No description provided

Open Access: Yes

DOI: 10.1007/s10098-023-02671-4

Integrated Analysis and Assessment of the Hungarian Regions in Terms of Health Problems and Waste Management Challenges caused by Asbestos

András Torma Gergely Zoltán Macher Dóra Beke

Publication Name: Chemical Engineering Transactions

Publication Date: 2023-01-01

Volume: 107

Issue: Unknown

Page Range: 361-366

Description:

Nowadays, more information is available regarding the health problems and waste management challenges caused by asbestos, and the research directions that focus on alternative agents, transport processes and mobilization routes of asbestos have gained ground. Only in recent years has the published research on the subject begun to deal more intensively with the development of evaluation methods that would ensure the consistent numerical qualification of individual territorial units. This paper examines the exposure of certain regions of Hungary along the lines of asbestos-related waste management and health aspects. After that, the individual relationships were identified and explored based on the specific patterns of the formed groups. The methodology of this paper is the calculation of an internationally applied integral index, the advantage of which is that it enables the comparison of numerical values with different dimensions. The focus of research is not the development of a new scientific methodology, but rather an exploration of the situation and regional comparability of asbestos exposure that is much more multidisciplinary, complex and multidimensional than the previous viewpoints. The value of the calculated integral index was 0.310±0.155 in 2005, while 0.339±0.170 in 2020. The rate of change in the value of the asbestos involvement and exposure integral index shows an increase of +28.5 % between 2005 and 2020. Based on the results, there are significant differences between the individual regions of Hungary along the values of the calculated multidimensional integral indices.

Open Access: Yes

DOI: 10.3303/CET23107061