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Found 6374 publications

Measuring and modeling the dynamic behavior of Danube Sands

Zsolt Szilvágyi R. P. Ray

Publication Name: 18th International Conference on Soil Mechanics and Geotechnical Engineering Challenges and Innovations in Geotechnics Icsmge 2013

Publication Date: 2013-01-01

Volume: 2

Issue: Unknown

Page Range: 1575-1578

Description:

The adaptation of Eurocode 8 and development of high speed rail system in Hungary has created a greater need to define dynamic behavior of local soil groups. Danube sands compose an important segment of these soils and present the geotechnical engineer with several design challenges. The soils are present at river crossings and major development parcels throughout Hungary. Although the engineering behavior of these sands can vary over a wide range, they retain some common characteristics that will help the engineer to make decisions about geotechnical and structural designs. Samples of Danube sands were brought in the laboratory for dynamic testing, which included resonant column and torsional simple shear testing. This paper summarizes the dynamic behavior of this typical local soil group with emphasis on the dynamic properties themselves. Researches will find the methods and approach to evaluating properties helpful in their work while design engineers will understand how these properties are applied.

Open Access: Yes

DOI: DOI not available

The effect of background and outlier subtraction on the structural entropy of two-dimensional measured data

No authors available

Publication Name: International Journal of Reasoning-based Intelligent Systems

Publication Date: 2020-01-01

Volume: 12

Issue: 3

Page Range: 200-209

Description:

For colonoscopy images the main information is in the fine structure of the surface of the bowel or colorectal polyps, similarly to the case of combustion engine cylinder surface scans, where the grooving and wear can be detected from the fine pattern superposed to a cylinder curvature. In both cases appear outliers, colonoscopy images have many reflections, whereas the roughness scanners detect small dust particles as well as the micron scale vibrations from the environment. The method presented in this paper takes care of both the problems using histogram stretching together with a special type of filtering. Also, masks are introduced in order to control the effect of the operators. The effects of the processing steps on the structural entropy of the image is also studied, as structural entropies are used in characterisation of the images. By removing the background makes the structural entropies much smaller, and by suppressing the outliers the structural entropies increase.

Open Access: No

DOI: DOI not available

Desirable versus desired: Different insulations from observability: An evolutionary step in value theory (?)

Károly Varga

Publication Name: Journal of Human Values

Publication Date: 2008-12-01

Volume: 14

Issue: 2

Page Range: 129-140

Description:

The subject of this study, the step forward-which the author felt to be 'of evolutionary value' - was occasioned by a Delphi discussion. The debate was opened by Varga's (2003, 2006a) contrastive exposition of diagnoses of present history with respect to Hungary's accession to the European Union, offered by some leading Hungarian sociologists (Henrik Kreutz, Kálmán Kulcsár, Iván Szelényi, Iván Vitányi), in which he tried to place the views of these authors in a value sociological system by Charles Morris (1956, 1964) and Geert Hofstede (1991). In Morris' case, this involved recourse to his combination of two systems: one semiotic, the other axiological; in Hofstede's, to his system of 'software of the mind' embracing axiology and organizational psychology. This synthesis was opposed by Kreutz (2006a) who offered a new ordering principle which he advanced as truer to life. The present confrontation between the value sociological synthesis advanced by Kreutz, on the one hand, and the trends hallmarked by the names of Morris and Hofstede, on the other hand, provided the author with an opportunity to find a resolution of the tension between desired and desirable, for which he has gained some side light from Robert K. Merton's (1957) theory of the different degrees of insulation of role-activities from observability by members of the role-set (and which has derived further refinement from Jean-Paul Sartre's conception of 'glance and shame').

Open Access: Yes

DOI: 10.1177/097168580801400204

Evaluation of finger imprint persistence as a practical method for measuring the severity of mammary oedema in dairy cows

Edit Mikó Violetta Tóth András Gáspárdy László Gulyás

Publication Name: Journal of Central European Agriculture

Publication Date: 2024-06-28

Volume: 25

Issue: 2

Page Range: 292-304

Description:

The study aims to assess the severity of udder oedema around the calving using a traditional scoring (0-3 point scale) and the firstly applied fingerprint test to measure skin firmness. Furthermore, it was investigated how the degree of udder oedema is influenced by the effects taken into account in the processing. The study was carried out on 62 animals diagnosed with udder oedema before calving at a typical large-scale dairy operation in Hungary. It was found that with more severe udder oedema, the first udder teats are thicker (P = 0.038) and the udder skin surface is cooler (P = 0.007), and the duration of the fingerprint is significantly longer (P < 0.001). There is a strong positive correlation between oedema severity and fingerprint persistence (r = 0.66, P < 0.05). This suggests that the persistence of finger imprint is a reliable indicator of the severity of udder oedema.

Open Access: Yes

DOI: 10.5513/JCEA01/25.2.4039

Fuzzy rule interpolation for multidimensional input spaces with applications: A case study

Tamás D. Gedeon Domonkos Tikk Ĺaszĺo T. Ḱoczy Kok Wai Wong

Publication Name: IEEE Transactions on Fuzzy Systems

Publication Date: 2005-12-01

Volume: 13

Issue: 6

Page Range: 809-819

Description:

Fuzzy rule based systems have been very popular in many engineering applications. However, when generating fuzzy rules from the available information, this may result in a sparse fuzzy rule base. Fuzzy rule interpolation techniques have been established to solve the problems encountered in processing sparse fuzzy rule bases. In most engineering applications, the use of more than one input variable is common, however, the majority of the fuzzy rule interpolation techniques only present detailed analysis to one input variable case. This paper investigates characteristics of two selected fuzzy rule interpolation techniques for multidimensional input spaces and proposes an improved fuzzy rule interpolation technique to handle multidimensional input spaces. The three methods are compared by means of application examples in the field of petroleum engineering and mineral processing. The results show that the proposed fuzzy rule interpolation technique for multidimensional input spaces can be used in engineering applications. © 2005 IEEE.

Open Access: Yes

DOI: 10.1109/TFUZZ.2005.859316

Interpretation of sustainability as the social adaptation of resiliency

M. Bulla

Publication Name: Wit Transactions on Ecology and the Environment

Publication Date: 2013-01-01

Volume: 179 VOLUME 1

Issue: Unknown

Page Range: 177-188

Description:

The paper briefly overviews different types of diversity; not only ecological ones but also its various socio, economical as well as local, regional and global technological appearances, like the importance of retaining irreplaceable cultural diversity and the diverse ways of thinking and behaviour. The first part of the study analyses these different types of diversity which are preserved. The discussion of the mutual connections of the bio-cultural diversity is the content of the next section. Sustainable development is in great need of adequate competencies and expertise, both in the planning and implementation phase of promoting programmes and projects, including the long-term and complicated effects of them. The fundamental condition of sustainability - and therefore any plan which intends to produce a sustainable socio, economical, moreover ecological system (SES), is that it should express the need for resilient improvement of institutions, and, in particular, the suitable institutionalisation of the decision making process. The research and assessment methodology of this study has been the gathering of a broad spectrum of social, economical, technological and ecological publications on this topic, evaluation of the scientific literature and also the combination of their results. The end of the paper consists of conclusions and furthermore, suggestions for scientists, experts and politicians on how to apply a holistic, multidisciplinary approach and methodology both in proposal and decision making processes. © 2013 WIT Press.

Open Access: Yes

DOI: 10.2495/SC130151

Identification of dynamic hysteresis model

Miklós Kuczmann

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2009-12-01

Volume: 85

Issue: 12

Page Range: 88-91

Description:

The paper presents a measurement system which can be used to prepare measured data to identify the Preisach hysteresis model. The identification is based on the Everett function. A fast and memory efficient realization of the model will be shown which is very useful in numerical field analysis techniques. The dynamic extension of the static model is based on the loss separation formula, and the measured excess magnetic field has been approximated by a feed-forward type neural network. The developed model has been inserted into a finite element procedure.

Open Access: Yes

DOI: DOI not available

Numerical Study of the Geogrid Reinforced Soil Wall Incorporating Strain-Softening Constitutive Soil Model

Seyed Ali Emamian Majid Movahedi Rad Vahid Shafaie Géza Herczeg Mahdi Salari

Publication Name: Advances in Transdisciplinary Engineering

Publication Date: 2024-01-01

Volume: 59

Issue: Unknown

Page Range: 327-333

Description:

This study embarks on a numerical exploration of Geogrid Reinforced Soil Walls (GRSW), employing finite difference analysis to compare two soil constitutive models, highlighting the efficacy of a refined strain-softening model. This innovative approach markedly improves the prediction of GRSW performance, particularly aligning the safety factor more closely with real-world observations. Notably, the strain-softening model demonstrates a superior ability over the perfectly plastic model by significantly reducing the mean overall error in predicting maximum geogrid strain overall from 51% to 30%, reflecting a significant 41% improvement in precision, thereby presenting a significant tool for enhancing geotechnical design practices. The research underlines the potential of this model to elevate the safety and reliability of GRSW constructions, contributing to elevated design standards within the field of geotechnical engineering.

Open Access: Yes

DOI: 10.3233/ATDE240563

Evaluating Seismic Vulnerability of Residential Buildings by Rapid Evaluation Method (REM)

Parves Sultan O. Kegyes-Brassai Md Faiz Shah Anas Ahmed

Publication Name: Future of Business and Finance

Publication Date: 2021-01-01

Volume: Part F9822

Issue: Unknown

Page Range: 541-552

Description:

Increased urbanization of a city may create a higher seismic risk. This study investigates Jeddah city, rapidly expanding in the number of buildings and population, to address the rapid evaluation of residential buildings using the rapid evaluation method (REM) to assess building stock to determine hazard and evaluate vulnerability through the scoring method from FEMA 155. Two districts were selected based on a cluster analysis of population and building data. One is a developing urbanized area, and the other is a traditional area. This offers a possibility to compare the vulnerability of buildings constructed according to different seismic codes and to make assumptions about the rest of the city based on typical structures. The basic structural score was determined considering the building structure and moderate seismicity of the region using score modifiers, e.g. vertical irregularity and soil score modifier, assuming sabkhas. The result of the investigation shows different levels of vulnerability and areas where intervention is needed.

Open Access: Yes

DOI: 10.1007/978-3-030-62171-1_26