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Found 6374 publications

Steel Exoskeletons for the Seismic Retrofit of an Existing RC Building: Optimal Design and Life Cycle Assessment

Marco Domaneschi Roberta Di Bari Majid Movahedi Rad Raffaele Cucuzza Giuseppe Carlo Marano Jana Olivo Giuseppe Andrea Ferro

Publication Name: Lecture Notes in Civil Engineering

Publication Date: 2025-01-01

Volume: 770 LNCE

Issue: Unknown

Page Range: 214-225

Description:

The growing need for structural, energetic and architectonic refurbishment of the existing structures led to the emergence of alternative retrofitting techniques. Among them, steel exoskeletons stand out for their non-invasive and time-efficient nature, especially in cases where the relocation of the building’s activities is not allowed. In this research, the optimal exoskeleton configuration, in terms of number of exoskeletons and their position around the building, along with the sizing of their constituent elements, has been obtained through an optimization process. The optimization tool is based on a Genetic Algorithm with the aim of weight minimization, including as constraints a maximum allowable inter-storey drift for preserving the elastic behavior of the existing building, and the structural safety of the exoskeleton members. Two exoskeleton typologies were selected as case studies, employed for the retrofitting of an existing RC moment-resisting frame building. Furthermore, Life Cycle Assessment analyses were conducted on the optimal configurations considering two materials: steels with high and low percentages of recycled materials. The results yielded interesting insights into the structural performance of both exoskeleton typologies, as well as into the environmental characteristics of both studied materials.

Open Access: Yes

DOI: 10.1007/978-3-032-08407-1_19

The cost-effectiveness of development risk through the filter of vaccine capitalism

Máté Frank Máté Frank

Publication Name: Rechtskultur

Publication Date: 2024-01-01

Volume: Unknown

Issue: Unknown

Page Range: 157-169

Description:

The purpose of this study is to carry out an examination of the economic sustainability of product liability, paying particular attention to the development risk that enables exemption from liability, as an exemption case. The product liability regulation that enables or excludes the manufacturer’s reference to development risk is not only a legal and legal policy issue, but also an economic policy issue affecting economic efficiency. In addition, how to install the development risk is also a question closely related to the role of the state in liability. The study pays special attention to the development risk related to the damage caused by medicines, vaccines as special products, maneuvering between state compensation obligation and manufacturer’s liability. In doing so, the study aims to answer such questions as whether product liability regulation is economically sustainable, and in accordance with this, is the currently defined procedure for deploying development risk cost-effective?

Open Access: Yes

DOI: DOI not available

Reliability in automotive engineering by fuzzy rule-based FMEA

Timea Fülep László Pokorádi

Publication Name: Lecture Notes in Electrical Engineering

Publication Date: 2013-01-01

Volume: 197 LNEE

Issue: VOL. 9

Page Range: 793-800

Description:

The Failure Modes and Effects Analysis (FMEA) is a reliability estimation method intended to identify potential failures which have significant consequences affecting the system performance. In a Failure Modes and Effects Analysis the Probability of Failure (PoF), Consequence of Failure (CoF) and Detectability of Failure (DoF) may be determined using engineering judgment and/or based mathematical models, where the result is expressed in a term. The terms qualities and quantities are sometimes used to distinguish these methods. The fuzzy FMEA is a quantitative method of reliability or risk analysis which involves the study of the failure modes can occur in every part of an integrated system. The aim of this paper is to show the possibility of use of fuzzy set theory to estimate failure criticality level theoretically and practically by exemplification of case study of process' risk assessment. © Springer-Verlag 2013.

Open Access: Yes

DOI: 10.1007/978-3-642-33805-2_64

Numerical study on the micro-mechanical behaviour of artificial granular materials

No authors available

Publication Name: fib Symposium

Publication Date: 2020-01-01

Volume:

Issue:

Page Range: 86-93

Description:

Numerical models for the simulation of the micro-mechanical behaviour of granular assemblies have a wide range of applications, for instance in material science, process engineering, environmental engineering, railway engineering and geotechnical engineering (in this study we examined one macro-grain but what important is behaviour of granular assemblies). In this examination, experimental tests and numerical computations using the discrete element method (DEM) are carried out to evaluate the micro-mechanical behviour of the granular materials. For this purpose, artificial materials are taken into consideration for experimental Brazilian laboratory tests, and then according to the experimental results the DEM model is calibrated. Artificial crushable materials are produced by mixing cement and silt according to their mass ratio, in which cement can provide bonding and silt is the main filling material. In the DEM model, a 3D crushable granular material ‘macro-grain’ is built up from a large number of micro-grains which are associated according to crushable parallel bond properties. The behaviour of the single crushable grains and the fragmentation patterns under different contact configuration and load position are studied. The DEM simulation results show that the contact configuration type and load position affect the fragmentation patterns and loading capacity.

Open Access: No

DOI: DOI not available

A new assessment methodology for fair-faced concrete surfaces based on digital image processing

No authors available

Publication Name: fib Symposium

Publication Date: 2020-01-01

Volume:

Issue:

Page Range: 288-295

Description:

Fair-faced concrete elements have become even more popular in architecture because of their pure aesthetics and favourable material properties. The europian standards and guidelines are usually specifying four classes regarding to the surface quality. However, the strandard assessment methodologies are based only on manual methods and they are very subjective in some cases. In order to increase the efficiency and accuary of the evaluation a new methodology is proposed using digital image processing. In this paper the basis of the evaluation method made by using the Python 3.6 software is presented by focusing on the surface void ratio which is one of the most common surface defects of fair-faced concrete structures.

Open Access: No

DOI: DOI not available

Numerical plastic analysis of non-prismatic reinforced concrete beams strengthened by carbon fiber reinforced polymers

No authors available

Publication Name: fib Symposium

Publication Date: 2020-01-01

Volume:

Issue:

Page Range: 208-215

Description:

The non-prismatic reinforced concrete (RC) beam considered a unique case in structural engineering as it has variable depth all over beam section and it doesn’t have sufficient information in structural codes, this can put structural engineers in a challenge to predict how this beam will react under specific types of loads or with different geometrical variables and strengthening existence. In this research, concrete plastic damage constitutive model developed and used to explore the shear strength of non-prismatic RC beam structure. Furthermore, in order to improve the shear strength of existent RC beams, Carbon Fiber Reinforced Polymers (CFRP) strips are attached to the surface of the critical sections. For this aim, initially numerical model was calibrated according to the data obtained from laboratory tests then a series of numerical simulations with different variables are carried out to investigate the shear behavior and these variables were: haunch angle α value and CFRP strips existence (composite status). The numerical results show that changing beams geometry (haunch angle α value) can have an influence over shear strength, in addition, using CFRP strips has an obvious effect on the failure behavior of the non-prismatic RC beam structure. Finite element simulations are executed by using ABAQUS.

Open Access: No

DOI: DOI not available

Navigation power of MaxWhere: A unique solution

Borbála Berki

Publication Name: 11th IEEE International Conference on Cognitive Infocommunications Coginfocom 2020 Proceedings

Publication Date: 2020-09-23

Volume: Unknown

Issue: Unknown

Page Range: 509-514

Description:

Precise and accurate navigation is an elementary expectation in desktop virtual realities. In this paper, the navigation method of MaxWhere VR is presented, furthermore, it is analyzed in terms of interaction fidelity and controller mapping. The MaxWhere VR platform offers different navigational operations, that are optimized for an external mouse with a scroll wheel. Besides moving forward and backward, rotating the camera view and lifting, another navigation type is available, the spherical orbit. This navigational operation is known from engineering software, and its role is to look around a selected object and observe it from each side. This function can be useful in educational and exhibition spaces where 3D models are located. These navigational operations are considered low-fidelity interactions, compared to human motions, although with the directionally mapped general control devices, such as a mouse, high perceived naturalness can be achieved that can relate to a higher sense of spatial presence.

Open Access: Yes

DOI: 10.1109/CogInfoCom50765.2020.9237904

Investigation of the relationship between cryptocurrency acceptance points and tourism in EU regions

Marcell Kupi

Publication Name: Journal of Infrastructure Policy and Development

Publication Date: 2024-01-01

Volume: 8

Issue: 8

Page Range: Unknown

Description:

This study examined the role of cryptocurrencies in tourism and their acceptance across EU regions, with particular attention to the digital transformation precipitated by the COVID-19 pandemic. The analysis focuses on the relationship between cryptocurrency acceptance points and the intensity of tourism, highlighting that the acceptance of cryptocurrencies is significantly correlated with tourism services. The literature review highlighted that Web 3.0, especially blockchain technology and decentralized applications, opens new possibilities in tourism, including secure and transparent transactions, and more personalized travel experiences. The research investigated cryptocurrency acceptance points and the intensity of tourism within the EU. The study illuminates that the acceptance of cryptocurrencies significantly correlates with tourism services. The data and methodology demonstrated the analysis methods for examining the relationship between cryptocurrency acceptance points and tourism intensity, including the use of clustering neural networks and Eurostat data utilization. The results showed a positive correlation between the number of cryptocurrency acceptance points and tourism intensity in the EU, affirming the research hypothesis. According to the regression analysis results, each additional cryptocurrency acceptance point is associated with an increase in tourism intensity. The significance of the research lies in highlighting the growing role of digital payment solutions, especially cryptocurrencies, in tourism, and their potential impacts on the EU economy. The analysis supports that the intertwining of tourism and digital financial technologies opens new opportunities in the sector for both providers and tourists.

Open Access: Yes

DOI: 10.24294/jipd.v8i8.4637

GEOSPATIAL PATTERNS IN WOMEN’S TOURISM MANAGEMENT: ANALYSIS OF MANAGERIAL TRENDS AND GENDER IMPACT IN HUNGARIAN TOURISM SECTORS

Botond Géza Kálmán Gábor Szábo-Szentgróti Zsolt Sándor Kőmüves

Publication Name: Geojournal of Tourism and Geosites

Publication Date: 2025-01-01

Volume: 59

Issue: 2

Page Range: 608-627

Description:

Gender composition in tourism management plays a critical role in shaping operational efficiency, decision-making processes, and industry growth—particularly in geosites and tourist-dependent regions. This study investigates global geospatial patterns in women’s involvement in tourism leadership, analyzing how gender dynamics influence managerial trends across various tourism sectors.Employing geospatial mapping and statistical techniques, the research draws on a comprehensive dataset that spans multiple countries and tourism contexts. It examines the regional variation in gender representation in managerial roles and its correlation with tourism performance, with a special focus on geosites—natural and cultural landmarks that attract high tourist traffic.The results reveal a marked geospatial disparity in the inclusion of women in tourism management. Regions with higher gender diversity in leadership demonstrate stronger tourism outcomes, including increased visitor engagement at geosites, more adaptive decision-making structures, and improved organizational performance. In contrast, regions with low female representation often lag in tourism growth and service quality. The study identifies cultural norms, institutional frameworks, and policy environments as key drivers of these regional differences. It underscores the importance of inclusive leadership in fostering innovation, resilience, and sustainable tourism development.The findings advocate for targeted policy measures and institutional reforms to promote gender-inclusive management structures. Ultimately, the study concludes that empowering women in tourism leadership not only addresses equity goals but also enhances sectoral dynamism, especially in geosite-rich regions—offering a strategic path toward more sustainable and resilient tourism industries.

Open Access: Yes

DOI: 10.30892/gtg.59209-1441