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Found 6278 publications

Behaviour of transdanubian clay under unloading and reloading

Edina Koch

Publication Name: Proceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering the Academia and Practice of Geotechnical Engineering

Publication Date: 2009-12-01

Volume: 1

Issue: Unknown

Page Range: 463-465

Description:

In recent years, in the field of geotechnical design, software based on FEM has come to the front. Advanced computer programs make it possible to use more developed soil models besides the most current elastic-plastic Mohr-Coulomb model. By using these computer programs, nonlinear behaviour of the soil can be followed better, even in the case of more complicated load events. Among the constitutive models incorporated in the commercial software the Hardening Soil Model (HS) and Soft Soil Model (SS) are the most promising ones. Observations and experience gained in tunnel construction, deep open excavation or preloaded embankment prove that with these soil models reality can be followed more accurately, especially in cases where unloading and reloading are present. In order to produce the software input parameters, in case of more complicated soil model, more demanding laboratory tests are needed. In case of HS model one of the basic demands is to determine the power for stress-level dependency of stiffness (m), tangent stiffness for primary oedometer loading (E oed ref) and unloading/reloading stiffness (E ur ref). The paper focuses on the behaviour of transdanubian clay common in Hungary. Sampling, laboratory investigations and evaluation aimed to determine the input parameters for the HS are described. Results based on a number of oedometric tests accomplished with unloading and reloading proved to be adequate for the computational purposes. © 2009 IOS Press.

Open Access: Yes

DOI: 10.3233/978-1-60750-031-5-463

Twin concept of fine structure constant as the 'self number-archetype' in perspective of the Pauli-Jung correspondence

Peter Varlaki Imre J. Rudas

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2009-12-01

Volume: 6

Issue: 2

Page Range: 77-108

Description:

The paper-similarly to our earlier publications since 1993 - is trying to 'synchronize' early quantum physics, the Kalmanian representation theory, Jungian analytic psychology, and certain aesthetical categories. The number '137', the so-called inverse Fine Structure Constant (IFSC), is placed at the centre of this heuristic and epistemological experiment, along with the scientific cooperation of Pauli and Jung. A new possibilistic twin concept of "controlling-observing equations" is proposed for the reinterpretation of the FSC and other Number Archetypes on the basis of the Hermeneutic and symbolic languages found in the W. Pauli and C. G. Jung " Correspondence". The first part of the paper deals in first line with the introduction of the possibilistic twin concept of FSC together with its interpretation according to the hermeneutical "tradition" of the Pauli-Jung collaboration.

Open Access: Yes

DOI: DOI not available

Switch-level test calculation for CMOS circuits

Jozsef Sziray

Publication Name: Proceedings International Workshop on Microprocessor Test and Verification

Publication Date: 2009-12-01

Volume: Unknown

Issue: Unknown

Page Range: 41-48

Description:

The paper presents a test calculation principle which serves for producing tests of switch-level logic faults in CMOS digital circuits. The considered fault model includes stuck-at-0/1 logic faults on the connecting control lines, as well as switch faults in the transistors. Both single and multiple faults are included. The transistor faults manifest themselves in stuck open (open circuit) and stuck short (short circuit) behavior. In this paper only combinational logic is taken into consideration. The computations are performed at the transistor level directly, i. e., by using the original transistor schematic solely, without any logic conversion. The calculation principle is comparatively simple. It is based only on successive line-value justification, and it yields an opportunity to be realized by an efficient computer program. © 2009 IEEE.

Open Access: Yes

DOI: 10.1109/MTV.2009.24

Comparative analysis of various evolutionary and memetic algorithms

János Botzheim Krisztián Balázs László T. Kóczy

Publication Name: 10th International Symposium of Hungarian Researchers on Computational Intelligence and Informatics Cinti 2009

Publication Date: 2009-12-01

Volume: Unknown

Issue: Unknown

Page Range: 193-205

Description:

Optimization methods known from the literature include gradient techniques and evolutionary algorithms. The main idea of gradient methods is to calculate the gradient of the objective function at the actual point and then to step towards better values according to this value. Evolutionary algorithms imitate a simplified abstract model of evolution observed in nature. Memetic algorithms traditionally combine evolutionary and gradient techniques to exploit the advantages of both methods. Our current research aims to discover the properties, especially the efficiency (i.e. the speed of convergence) of particular evolutionary and memetic algorithms. For this purpose the techniques are compared by applying them on several numerical optimization benchmark functions and on fuzzy rule base identification.

Open Access: Yes

DOI: DOI not available

Modernization of modern buildings - Case study on the main building of Széchenyi István University in Gyo′r

T. Horváth

Publication Name: Pollack Periodica

Publication Date: 2009-12-01

Volume: 4

Issue: 3

Page Range: 67-78

Description:

This paper presents a case study on a building, which was designed in the influence of the New Brutalism in the 1970s. At first the origin, the concept and the values of the building are revealed, then several experts' opinion are summarized about its problems emphasizing the necessity of the frontal modernization. From the description of the designed modernization it is visible how the house will be able to fulfill the recent functional and energetic requirements. © 2009 Akadémiai Kiadó.

Open Access: Yes

DOI: 10.1556/Pollack.4.2009.3.6

Simulation and measurement of magnetic based nondestructive tester

Miklós Kuczmann Gergely Kovács

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2009-12-01

Volume: 85

Issue: 12

Page Range: 76-79

Description:

The paper presents the analysis of a nondestructive testing equipment under investigation. There are three main parts of the research as well as this paper. The first part shows the present state of the developed nondestructive tester based on the Magnetic Flux Leakage (MFL) method, the second part reviews the simulation and the results, which have been made with the principle of the Finite Element method (FEM). The last part presents the measurement results, which have been performed with the nondestructive tester. In this paper the simulation results with the measurement results have been compared.

Open Access: Yes

DOI: DOI not available

Twin Concept of fine structure constant as the 'self number-archetype' in perspective of the Pauli-Jung correspondence

Peter Varlaki Imre J. Rudas

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2009-12-01

Volume: 6

Issue: 2

Page Range: 109-137

Description:

The paper - 'similarly to our earlier publications since 1993 - is trying to 'synchronize' early quantum physics, the Kalmanian representation theory, Jungian analytic psychology, and certain aesthetical categories. The number '137', the so-called inverse Fine Structure Constant (FSC), is placed at the centre of this heuristic and epistemological experiment, along with the scientific cooperation of Pauli and Jung. A new possibilistic twin concept of "controlling-observing equations" is proposed for the reinterpretation of the FSC and other Number Archetypes on the basis of the Hermeneutic and symbolic languages found in the W. Pauli and C. G. Jung " Correspondence". The second part of the paper deals with the new ways of cognition and imagination related to the "Background Control Theory" which can be identified mainly in the Pauli-Jung collaboration anticipating the new system and control approach of R E. Kalman Furthermore, we summarize this unusual attempt and give an extensive bibliography for further reading.

Open Access: Yes

DOI: DOI not available

Applying bacterial memetic algorithm for training feedforward and fuzzy flip-flop based neural networks

János Botzheim László Gál António E. Ruano László T. Kóczy

Publication Name: 2009 International Fuzzy Systems Association World Congress and 2009 European Society for Fuzzy Logic and Technology Conference Ifsa Eusflat 2009 Proceedings

Publication Date: 2009-12-01

Volume: Unknown

Issue: Unknown

Page Range: 1833-1838

Description:

In our previous work we proposed some extensions of the Levenberg-Marquardt algorithm; the Bacterial Memetic Algorithm and the Bacterial Memetic Algorithm with Modified Operator Execution Order for fuzzy rule base extraction from input-output data. Furthermore, we have investigated fuzzy flip-flop based feedforward neural networks. In this paper we introduce the adaptation of the Bacterial Memetic Algorithm with Modified Operator Execution Order for training feedforward and fuzzy flipflop based neural networks. We found that training these types of neural networks with the adaptation of the method we had used to train fuzzy rule bases had advantages over the conventional earlier methods.

Open Access: Yes

DOI: DOI not available

Parasitism of different life stages and phenology of the horse-chestnut leafminer ( Cameraria ohridella ) and its parasitoids

P. Benedek B. Horváth

Publication Name: Acta Phytopathologica Et Entomologica Hungarica

Publication Date: 2009-12-01

Volume: 44

Issue: 2

Page Range: 295-313

Description:

The horse-chestnut leafminer is a new pest which was established in North-West Hungary ca. 10 years prior to these investigations. Due to the very limited time, there are relatively few studies on the parasitoid community of the moth and its connection with the leafminer host. Authors used twig-isolators to find out which larval/pupal instars are mostly parasitized and by which chalcidoid species. They also made an attempt to calculate density curves of different developmental stages of the moth and to compare them with flight curves of the parasitoids. Experiences indicated that 4-week-old larval (pupal) instars were parasitized to the highest degree. The most frequent parasitoids were Pediobius saulius and Pnigalio agraules . Statements about a poor synchronization between moth and parasitoids were confirmed but possibility of a shift in swarming times on location was suggested. Different methods to calculate rate of parasitism were compared and evaluated. © 2009 Akadémiai Kiadó.

Open Access: Yes

DOI: 10.1556/APhyt.44.2009.2.7