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Found 6289 publications

Parallel solution of electrostatic and static magnetic field problems by domain decomposition method

Miklós Kuczmann Daniel Marcsa

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2013-01-01

Volume: 89

Issue: 2 B

Page Range: 49-52

Description:

The paper presents a parallel approach for the efficient solution of a one-dimensional and a two-dimensional problem by parallel finite element method. These problems are case studies. The non-overlapping domain decomposition method has been used to cut the problem into subregions or also called sub-domains, and it reduces the large mass matrix into smaller parts. The independent sub-domains, and the assembling of these equation systems can be handled by the independent processors of a supercomputer, i.e. in a parallel way. The execution time and speedup of parallel finite element method have been compared to the serial one.

Open Access: Yes

DOI: DOI not available

Extraction of daily life log measured by smart phone sensors using neural computing

János Botzheim Dalai Tang Takenori Obo Bakhtiar Yusuf Toru Yamaguchi Naoyuki Kubota

Publication Name: Procedia Computer Science

Publication Date: 2013-01-01

Volume: 22

Issue: Unknown

Page Range: 883-892

Description:

This paper deals with the information extraction of daily life log measured by smart phone sensors. Two types of neural computing are applied for estimating the human activities based on the time series of the measured data. Acceleration, angular velocity, and movement distance are measured by the smart phone sensors and stored as the entries of the daily life log together with the activity information and timestamp. First, growing neural gas performs clustering on the data. Then, spiking neural network is applied to estimate the activity. Experiments are performed for verifying the effectiveness of the proposed method. © 2013 The Authors.

Open Access: Yes

DOI: 10.1016/j.procs.2013.09.171

Historical origin of the fine structure constant: Part IV: Coronatio: Explicandi et applicandi subtilita(ti)s structurae constantis sephano rege

Peter Varlaki Imre J. Rudas

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2012-12-21

Volume: 9

Issue: 5

Page Range: 45-93

Description:

Part IV of our paper on the historical (archetypal) background of the "fine structure constant" deals with the general physical and psychic world views, concealing the dynamic isomorphic meaning systems, related to Saint Stephen (Sephanus Rex) found in works of 1000 years old. Following the comparison of the representations (pre-figurations of the dynamic models) of the demonstrated background languages, we present that the author devoted himself to create a common background language of different religious courses. We intend to show that the background language (considered in general as a mapping of primordial images for "system and control" problems), was centred on his assumed proto-Cabbala, the Book of Bahir and its concealed meaning system, in close relation with the numeric archetype of 137 and the 137-type of "fine structures" within the decimal sephirotic world "controlling system" of the pleroma (the hypothesised "transcendent cyber space").

Open Access: Yes

DOI: DOI not available

Cultural side of tacit knowledge management

No authors available

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

Publication Date: 2012-12-20

Volume: 2

Issue:

Page Range: 1352-1360

Description:

In the 21st century tacit knowledge and its management has become a central theme of organizations and enterprises. Until the last decade, the possession of physical resources meant wealth and power in business. Labour, capital and natural resources were the key factors of production. Today, this trend is undeniably changing. In the rapidly evolving world of technology the only important factor providing long-term competitive advantage is the knowledge of the employees. Tacit knowledge is an invisible resource which has an enormous effect on the performance and success of a company, though it is personal, context-and cultures-pecific, besides hard to formalize and communicate. Tacit knowledgeincludes experiences, ideas, values and emotions and of course the factors of national culture. The main problem is that institutions are not aware of what kind of knowledge and information they possess. Hence, these assets are unorganized and not focused towards any objectives. The difficulties of sharing the lessons and experiences lead to wasting time and money on solving problems that have already been solved. That is why it is necessary to engage in knowledge management. As part of a wide-range research, we have examined which methods and procedures are used by Hungarian and Slovak companies to facilitate the retention of tacit knowledge of their employees in the organizational memory. How can the national culture influence the use of tacit knowledge management methods? The study involved 124 Hungarian and 122 Slovak companies and raised important questions in the scientific and organizationallife as the focus of our research. In our research we aspired to involve a wide range of enterprises, subsequently we examined small-and medium-size enterprises, multinational companies and organizations from both the for-profit and non-profit sectors. We conducted both qualitative and quantitative research because this is the most effective way of understanding the problem mentioned above.

Open Access: No

DOI: DOI not available

Transform explicit knowledge to implicit- status or process

No authors available

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

Publication Date: 2012-12-20

Volume: 2

Issue:

Page Range: 1517-1523

Description:

The fact that knowledge management plays an important role in the life of businesses can be proved by the number ofthe scientific publications dealing with this issue. It can be said to be a current favourite and well-processed topic of literature. In practice among middle- and senior managers it has become a means of strategy creation as its methods are more often used at an operative level. Our decision to begin our research in this field was strengthened by the further consideration of a quotation by Edwin Land - the leader of HP - often cited in the literature on this topic. According to Land "90 percent of Polaroid's capital get in their car and go home every evening". This is indeed true but according to Land the following morning they also get back in their car and 90% of the company's capital will again be in the same place and available once more. Since a part of knowledge belongs to the individual, meaning that it cannot be documented or verbalised as it is based on experience, the question arises as to what types of new tasks the holding of this knowledge creates, especially in the case of those in key positions and employees considered as key figures from another viewpoint. This question becomes particularly exciting - where we are also able to see the real value/benefit of this study- if, through analysing the most common form of predictable labour movements (here I refer mainly to retirement), sucha procedure can be reconstructed, thus providing businesses with the means to prepare themselves for a continuous shar of tacit or experimental knowledge in the case of other predictable labour movement (like maternity leave or a longer period in the foreign domiciles of a subsidiary or a parent company). A major part of preserving competitive advantage nowadays is knowledge, especially tacit knowledge. For this reason we will highlight that due to these dynamic processes tacit knowledge sharing of businesses should be continuous in corporate practice in the case of every "important" person. This direction would differ from the approaches of knowledge management dealing with implicit knowledge in that we would not look for the solution to transforming implicit knowledge to explicit knowledge but rather in such a system-based process, the result of which would be a conscious management of tacit knowledge sharing. The main line of knowledge management science is how to transform implicit knowledge to explicit in order to share it. I would like to introduce a new wayof knowledge sharing which doesn't rely on traditional tools.

Open Access: No

DOI: DOI not available

Cultural side of tacit knowledge management

Bencsik Andrea Viktoria Magyar-Stifter Andrea Sólyom

Publication Name: Proceedings of the European Conference on Knowledge Management Eckm

Publication Date: 2012-12-20

Volume: 2

Issue: Unknown

Page Range: 1352-1360

Description:

In the 21st century tacit knowledge and its management has become a central theme of organizations and enterprises. Until the last decade, the possession of physical resources meant wealth and power in business. Labour, capital and natural resources were the key factors of production. Today, this trend is undeniably changing. In the rapidly evolving world of technology the only important factor providing long-term competitive advantage is the knowledge of the employees. Tacit knowledge is an invisible resource which has an enormous effect on the performance and success of a company, though it is personal, context-and cultures-pecific, besides hard to formalize and communicate. Tacit knowledgeincludes experiences, ideas, values and emotions and of course the factors of national culture. The main problem is that institutions are not aware of what kind of knowledge and information they possess. Hence, these assets are unorganized and not focused towards any objectives. The difficulties of sharing the lessons and experiences lead to wasting time and money on solving problems that have already been solved. That is why it is necessary to engage in knowledge management. As part of a wide-range research, we have examined which methods and procedures are used by Hungarian and Slovak companies to facilitate the retention of tacit knowledge of their employees in the organizational memory. How can the national culture influence the use of tacit knowledge management methods? The study involved 124 Hungarian and 122 Slovak companies and raised important questions in the scientific and organizationallife as the focus of our research. In our research we aspired to involve a wide range of enterprises, subsequently we examined small-and medium-size enterprises, multinational companies and organizations from both the for-profit and non-profit sectors. We conducted both qualitative and quantitative research because this is the most effective way of understanding the problem mentioned above.

Open Access: Yes

DOI: DOI not available

Transform explicit knowledge to implicit- status or process

Bencsik Andrea Viktoria Magyar-Stifter Andrea Sólyom

Publication Name: Proceedings of the European Conference on Knowledge Management Eckm

Publication Date: 2012-12-20

Volume: 2

Issue: Unknown

Page Range: 1517-1523

Description:

The fact that knowledge management plays an important role in the life of businesses can be proved by the number ofthe scientific publications dealing with this issue. It can be said to be a current favourite and well-processed topic of literature. In practice among middle- and senior managers it has become a means of strategy creation as its methods are more often used at an operative level. Our decision to begin our research in this field was strengthened by the further consideration of a quotation by Edwin Land - the leader of HP - often cited in the literature on this topic. According to Land "90 percent of Polaroid's capital get in their car and go home every evening". This is indeed true but according to Land the following morning they also get back in their car and 90% of the company's capital will again be in the same place and available once more. Since a part of knowledge belongs to the individual, meaning that it cannot be documented or verbalised as it is based on experience, the question arises as to what types of new tasks the holding of this knowledge creates, especially in the case of those in key positions and employees considered as key figures from another viewpoint. This question becomes particularly exciting - where we are also able to see the real value/benefit of this study- if, through analysing the most common form of predictable labour movements (here I refer mainly to retirement), sucha procedure can be reconstructed, thus providing businesses with the means to prepare themselves for a continuous shar of tacit or experimental knowledge in the case of other predictable labour movement (like maternity leave or a longer period in the foreign domiciles of a subsidiary or a parent company). A major part of preserving competitive advantage nowadays is knowledge, especially tacit knowledge. For this reason we will highlight that due to these dynamic processes tacit knowledge sharing of businesses should be continuous in corporate practice in the case of every "important" person. This direction would differ from the approaches of knowledge management dealing with implicit knowledge in that we would not look for the solution to transforming implicit knowledge to explicit knowledge but rather in such a system-based process, the result of which would be a conscious management of tacit knowledge sharing. The main line of knowledge management science is how to transform implicit knowledge to explicit in order to share it. I would like to introduce a new wayof knowledge sharing which doesn't rely on traditional tools.

Open Access: Yes

DOI: DOI not available

On weighted possibilistic informational coefficient of correlation

István Harmati Peter Varlaki Imre J. Rudas Robert Fuller

Publication Name: International Journal of Mathematical Models and Methods in Applied Sciences

Publication Date: 2012-12-19

Volume: 6

Issue: 4

Page Range: 592-599

Description:

In their previous works Fullér et al. introduced the notions of weighted possibilistic correlation coefficient and correlation ratio as measures of dependence between possibility distributions (fuzzy numbers). In this paper we introduce a new measure of strength of dependence between marginal possibility distributions, which is based on the informational coefficient of correlation. We will show some examples that demonstrate some good properties of the proposed measure.

Open Access: Yes

DOI: DOI not available

Impact assessment of chemical decontamination base-technology's preoxidation step on different steel surfaces

Horváthné Deák Emese Andrea Szabó Nagy Varga Kálmán Ható Zoltán Patek Gábor Kristóf Tamás Schunk János

Publication Name: Korrozios Figyelo

Publication Date: 2012-12-14

Volume: 52

Issue: 4

Page Range: 73-80

Description:

A novel efficient "soft" chemical decontamination technology has been developed - supported by the Paks Nuclear Power Plant - at the Institute of Radiochemistry and Radioecology of the University of Pannonia. The present work gives a brief overview on the corrosion and dissolution processes of austenitic stainless steel and carbon steel specimens that occur in the oxidative pretreatment step (mixture of 1.0 g·dm-3 HMnO4 + 0.2 mol·dm-3 HNO3, pH = 0.8-1.0) of the novel base-technology. The oxidative pretreatment of steel specimens was performed under laboratory conditions in an electrochemical cell, and the open circuit (corrosion) potential of treated surfaces was studied by a VoltaLab 40 (RADIOMETER) type electrochemical measuring system controlled by PC. In addition, the redoxi potential in the decontamination solution was measured on-line by Consort C861 type electrochemistry meter. In the course of the chemical procedure the concentration of the main alloying components (stainless steel: Fe, Cr, Ni, carbon steel: Fe) dissolved from the surface oxide layer into the decontamination solutions was determined by ICP-OES method. The morphology and chemical composition of the oxide layer formed on the surfaces of steel specimens were studied by scanning electron microscopy (SEM), equipped with an energy dispersive X-ray microanalyzer (EDX). The results of our laboratory experiments have revealed that the acidic dissolution of austenitic stainless steel surfaces by nitric acid is negligible (at room temperature), while that the carbon steel surface is significant and intensive. After addition of permanganic acid, a moderate dissolution of the protective oxide layer of the austenitic stainless steel surface was observed; however, the reaction is blocked by MnO2 formed on the steel surface. On the other hand, the dissolution rate of carbon steel surface is not increased following the addition of permanganic acid into nitric acid solution, and the formation of surface MnO2 is marginal.

Open Access: Yes

DOI: DOI not available