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Found 6289 publications

Particle-associated PAHs in urban and rural ambient air samples

Andrea Szabó Nagy János Szabó

Publication Name: World Congress on Civil Structural and Environmental Engineering

Publication Date: 2018-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

The purpose of this study was to evaluate and compare the concentration levels and distributions of airborne polycyclic aromatic hydrocarbons (PAHs) between urban area of Gyor and the nearest rural area of Sarro´d (Hungary). Nineteen selected polycyclic aromatic hydrocarbons (PAHs) including the 16 priority US EPA PAH compounds, 2-methylnaphthalene, benzo(j)fluoranthene and benzo(e)pyrene in PM10 aerosol samples were determined under the authority of the Government Office for Gyor-Moson-Sopron County, Environmental Protection Laboratory and seasonal distributions were examined based on long-term monitoring data. Moreover, the concentration levels of fine (PM2.5) particle-associated PAHs measured in Gyor in a heating season are also discussed. About 2 times higher Total PAHs concentrations were obtained for urban samples compared to the rural samples on average. All of the investigated PAH compounds were identified in the PM10 aerosol samples. PAHs fluctuate significantly in all years with higher means and peak concentrations in the winter and autumn compared to that of spring or summer times at both monitoring sites. Approximately 27 and 18 times higher benzo(a)pyrene (BaP) toxic equivalence quotient (TEQ) concentrations in PM10 in urban and rural sites were detected in the heating seasons, respectively. Acenaphthene and fluorene were not detected in the PM2.5 samples. The dominant PM2.5-bound PAH compounds were indeno(1,2,3-cd)pyrene and sum of three benzofluoranthene isomers followed by benzo(ghi)perylene and BaP. Relatively high mean TEQ concentration level were observed for PM2.5-bound PAHs in the examined heating season.

Open Access: Yes

DOI: 10.11159/awspt18.101

Designing an FR-soft-skill measurement system to be used in adult- or higher education

Enikő Baróti Attila Mészáros Attila

Publication Name: Advances in Intelligent Systems and Computing

Publication Date: 2018-01-01

Volume: 594

Issue: Unknown

Page Range: 406-417

Description:

The environment of the 21st century adult and tertiary education has changed at several places. The obstacles of information flow have disappeared and the educational environment has been virtualized. At the same time, the learning habits of students have also changed radically. These changes should be followed by teriary and adult education as well. By accepting these phenomena workers of tertiary and adult education have to face a lot of fresh challenges. It is very important for them to adjust to the trends mentioned above. Even those people who are not certified teachers need information, pedagogical and psychological knowledge to be able to find their way in the pedagogy of adult and tertiary education.

Open Access: Yes

DOI: 10.1007/978-3-319-60372-8_39

An attempt to categorize Hungarian community currencies

No authors available

Publication Name: DETUROPE

Publication Date: 2018-01-01

Volume: 10

Issue: 1

Page Range: 144-159

Description:

Since the emergence of complementary currencies in the 1980s there have been numerous attempts to classify them, despite that the terms local currency, community currency and many others describing place-based monetary tools are not considered similarly by scholars. The local currencies take many forms, and local governments play different roles in their emergence and development. In Hungary there has been an increasing attention and discussion around the idea of implementing these alternative monetary tools. There is a growing number of working complementary currencies in Hungary, but academic research focuses mostly on whether these can contribute to the local development and what kind of effects they have. The aim of this paper is to present a possible categorization of Hungarian complementary currencies based on the role local governments played in their implementation. I evaluate whether these community currencies are effective at first, and attempt to categorize them based on their purpose, association form and their relationships with local governments, with the purpose of increasing awareness for these initiatives in the process of policy-making.

Open Access: No

DOI: DOI not available

Extraction/Infusion Rate Effects on Continuous Soil-Water Characteristic Curves for Clayey Sand

Inthuorn Sasanakul Muwafaq Awad Richard P. Ray

Publication Name: Geotechnical Special Publication

Publication Date: 2018-01-01

Volume: 2017-November

Issue: GSP 301

Page Range: 28-37

Description:

An automated tempe cell test system was used in this study to measure soil-water characteristic curves (SWCC) for both wetting and drying paths. The test was performed by extracting water at a controlled rate from the soil specimen during drying and infusing water into the specimen during wetting. In this paper, effect of extraction and infusion rate on the shape, parameters, and hysteresis of the SWCCs were examined for pure sand and clayey sand. Results show that the rate has no effect on the SWCCs for pure sand, but has a measurable effect for clayey sand. Effects of the rate are observed on all the SWCC parameters, particularly slope of the SWCCs and re-saturation parameters. Consequently, the wetting path is more influenced by the rate than the drying path. The automated system can be used efficiently for sand at fast rates but for clayey sand, the rate effect should be considered.

Open Access: Yes

DOI: 10.1061/9780784481684.004

Mobility for the Internet of Things

Claudiu Radu Pozna Sorin Aurel Moraru Javier Vales Alonso Bartolomeo Montrucchio

Publication Name: Mobile Information Systems

Publication Date: 2018-01-01

Volume: 2018

Issue: Unknown

Page Range: Unknown

Description:

No description provided

Open Access: Yes

DOI: 10.1155/2018/2127383

Cooperative learning in VR environment

Viktória Kövecses-Gősi

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2018-01-01

Volume: 15

Issue: 3

Page Range: 205-224

Description:

Nowadays it is increasingly visible that a change in the approach is needed in the field of education, thus we should move from “traditional” educational methods towards experience-oriented and cooperative teamwork-based education which considers the characteristics of the digital generation. After the brief demonstration of the methodological characteristics and the principles of digital culture, the present study aims to introduce how a lesson built on the improvement of different intelligence levels through cooperative techniques can be implemented with the help of virtual space, what opportunities are provided by the MaxWhere program for planning and organising teamwork and for supporting learning.

Open Access: Yes

DOI: 10.12700/APH.15.3.2018.3.12

Relationship between knowledge sharing willingness and life goals of generation Z

No authors available

Publication Name: Proceedings of the European Conference on Knowledge Management, ECKM

Publication Date: 2018-01-01

Volume: 1

Issue:

Page Range: 84-94

Description:

The most critical area of knowledge management systems is the knowledge transfer and knowledge sharing. Several research results have emerged applying different approaches with a focus why employees and leaders of companies do not share their knowledge. Differences in social, cultural and individual values are in the background of willingness to share knowledge. Each of these attributes raise further questions. The main objective of this research is to examine the knowledge sharing willingness of Generation Z and consider the cultural determinants having impact on them. The research objective was to compare the results of Hungary and Slovakia. A questionnaire survey was conducted among the students of elementary and high schools. The electronic questionnaire included questions on a 5-point Likert scale, which were evaluated with a help of simple and complex statistical methods using the SPSS program. The study of life goals was based on the study of Aspiration Index in earlier research. The results show that cultural characteristics have significant influence on the characteristic features of behaviour related to trust, learning and knowledge. The national culture has impact on knowledge-friendly attitude of the school community. According to Aspiration Index Analysis, intrinsic goals gain more importance than extrincic goals. While getting older, the importance on intrinsic goals is increasing. The highly materialistic approach (preference of extrinsic goals) reduces the ability to coopearate. It increases competition and the self-interest, which are obstacles to knowledge-sharing. The ratio of goals (intrinsic/extrinsic) determines the decisions of young people (career choice), as well as those important skills that are relevant in the society and influence career choice e.g. cooperation, responsibility.

Open Access: No

DOI: DOI not available

An attempt to categorize Hungarian community currencies

Eszter Szemerédi

Publication Name: Deturope

Publication Date: 2018-01-01

Volume: 10

Issue: 1

Page Range: 144-159

Description:

Since the emergence of complementary currencies in the 1980s there have been numerous attempts to classify them, despite that the terms local currency, community currency and many others describing place-based monetary tools are not considered similarly by scholars. The local currencies take many forms, and local governments play different roles in their emergence and development. In Hungary there has been an increasing attention and discussion around the idea of implementing these alternative monetary tools. There is a growing number of working complementary currencies in Hungary, but academic research focuses mostly on whether these can contribute to the local development and what kind of effects they have. The aim of this paper is to present a possible categorization of Hungarian complementary currencies based on the role local governments played in their implementation. I evaluate whether these community currencies are effective at first, and attempt to categorize them based on their purpose, association form and their relationships with local governments, with the purpose of increasing awareness for these initiatives in the process of policy-making.

Open Access: Yes

DOI: 10.32725/det.2018.009

Optimization-based parameter tuning of unscented Kalman filter for speed sensorless state estimation of induction machines

Krisztian Horvath Marton Kuslits

Publication Name: Proceedings 2017 5th International Symposium on Electrical and Electronics Engineering Iseee 2017

Publication Date: 2017-12-07

Volume: 2017-December

Issue: Unknown

Page Range: 1-7

Description:

State estimation of induction machines may be a difficult problem, due to the non-linear behavior of theirs. For non-linear state estimation, the unscented Kalman filter (UKF) is a well-known extension of the linear Kalman filter. Operation of the UKF algorithm strongly depends on the process and measurement noise covariance parameters of the estimator. Determination of these parameters is not straightforward and can be difficult, especially if the number of state variables and hence the system complexity is relatively high. In this paper, the UKF algorithm is applied for speed sensorless state estimation of induction machines in such a way that seven state variables are estimated from the measured stator currents and from the known excitation voltages. In order to tune the noise parameters of the UKF, a new, optimization-based method is presented. This tuning method provides adequate behavior for the observer beside difficult operating conditions as it has been shown by simulation experiment.

Open Access: Yes

DOI: 10.1109/ISEEE.2017.8170649