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Found 6374 publications

Robot edutainment on walking motion of multi-legged robot

János Botzheim Noriko Takase Naoyuki Kubota

Publication Name: Proceedings 2013 2nd International Conference on Robot Vision and Signal Processing Rvsp 2013

Publication Date: 2013-01-01

Volume: Unknown

Issue: Unknown

Page Range: 229-233

Description:

In this paper we present a short-term robot edutainment for junior high school students. The theme of this robotic course is the walking motion of multi-legged robot. We provided the students with the robot educational material that contains assembled leg parts. The students devised the configuration and motion of the robot using given constraints. We conducted a robot contest for the students to present their results in this robot course. As a result, by using limited materials, the students were able to produce a robot that shows their ingenuity. We could observe from a questionnaire about the course that the students were interested in science and robots. © 2013 IEEE.

Open Access: Yes

DOI: 10.1109/RVSP.2013.59

Ranking of beef cattle sires by their breeding value on progeny performance

Szabolcs Bene J. Péter Polgár Márton Szűcs Ferenc Szabó

Publication Name: Journal of Central European Agriculture

Publication Date: 2020-01-01

Volume: 21

Issue: 4

Page Range: 697-706

Description:

The objective of this study was to rank Limousin sires by their different breeding values based on the weaning weight of their progeny. 205-day weaning weight record of altogether 18746 purebred and crossbred calves sired by breeding bulls of the mentioned breed were used for the estimation. Calves were belonging to three different groups by their genotype. Three different BLUP animal models were used for the estimation. According the results the direct heritability (h2) estimates of 205-day weight ranged between 0.49 and 0.59, while that of the maternal heritabilityd(h2) between m 0.24 and 0.45. The estimated breeding value of the given sires differed by the genotype (purebred or crossbred) of their progeny calves and the method of estimation. Also, there were differences in the rank of the sires depending on the genotype of their progeny, as well as the estimation methods.

Open Access: Yes

DOI: 10.5513/JCEA01/21.4.2821

Teaching coaching using 3D/VR technology in the light of intercultural knowledge

Judit Sipos Attila Pongracz

Publication Name: 8th IEEE International Conference on Cognitive Infocommunications Coginfocom 2017 Proceedings

Publication Date: 2017-07-02

Volume: 2018-January

Issue: Unknown

Page Range: Unknown

Description:

Teaching Coaching using 3D/VR Technological background may offer novel experience to learners regarding visual impact and content, which makes both imparting and learning new materials more efficient. Coaching, which is an individual and group-oriented human developing methodology, has become a widely recognized and applied methodology all over the world. Hence, intercultural knowledge has a special focus in teaching and in the practice of coaching.

Open Access: Yes

DOI: 10.1109/CogInfoCom.2017.8268292

Performance Analysis of Encryption Capabilities of ARM-based Single Board Microcomputers

Sándor Répás

Publication Name: Infocommunications Journal

Publication Date: 2023-06-01

Volume: 15

Issue: 2

Page Range: 8-13

Description:

In the few years since the Raspberry Pi was released in 2012, countless microcomputers based on the ARM architecture have been introduced. Their small size, high performance relative to their power consumption, and the ability to run the popular Linux operating system make them ideal for a wide range of tasks. Information security is an area of particular importance. Different encryption and encoding algorithms play an important role in almost all areas of information security. However, these algorithms are very computationally intensive, so it is important to investigate which microcomputers can be used for these tasks, and under which trade-offs. The performance of ten different microcomputers is investigated and presented for the application of common symmetric and public-key encryption and decryption, digest creation and message authentication protocols, such as RSA, AES, HMAC, MD5, SHA. Reliable encryption requires the generation of reliable (pseudo)random numbers (Cryptographically Secure Random Numbers, CSRN), and microcomputers based on ARM SoCs usually have hardware implemented (pseudo)random number generators. The applicability of the random number generators of different microcomputers are investigated and presented; test methods are described, and recommendations are made.

Open Access: Yes

DOI: 10.36244/ICJ.2023.2.6

Hierarchical spiral discovery networks for multi-layered exploration-exploitation tradeoffs

Adam Csapo

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2019-01-01

Volume: 16

Issue: 1

Page Range: 63-76

Description:

The Spiral Discovery Network (SDN) was recently proposed as a tool for automated parametric optimization based on the Spiral Discovery Method. SDN can be seen as a heuristic optimization approach that offers tradeoffs between exploration and exploitation without hav- ing recourse to explicit gradient-based feedback information (unlike classical neural networks) and without requiring hand-coded representations of metaheuristic constructs such as genotypes (unlike genetic algorithms). In this paper, the properties of the SDN model are further explored, and two extensions to the model are proposed. The first extension corrects a shortcoming of the original model and has to do with the assignment of credit among different output components based on the most recent performance of the model at any given time. The second extension con- sists of using multiple SDN cells in a hierarchical architecture, which enables a fuller and more effective exploration of the parametric space. The improvements provided by the two extensions are validated on the same set of simulations discussed in earlier work.

Open Access: Yes

DOI: 10.12700/APH.16.1.2019.1.4

Enhancing Stormwater Management in Érd, Hungary, through Nature-Based Solutions for Sustainability and Resilience

Katalin Bene Attila Kálmán Gergely Ámon Csaba Szél

Publication Name: Chemical Engineering Transactions

Publication Date: 2024-01-01

Volume: 114

Issue: Unknown

Page Range: 1027-1032

Description:

Traditionally, stormwater management strategies were designed to evacuate water swiftly and efficiently to mitigate flood risks. However, water conservation has become a crucial concern with growing environmental awareness, raising damage costs due to climate change and sustainability goals. Urban stormwater capture and utilization are essential for maintaining soil moisture levels, irrigating green spaces, reducing urban heat islands, supporting diverse wildlife, fostering ecological balance, and improving living conditions. This study focuses on a dynamically growing Hungarian city, Érd, with rapidly changing land use and utilizes the numerical Storm Water Management Model to simulate various water resources management scenarios. The simulations revealed multiple vulnerabilities in the channel network, leading to a comprehensive reevaluation and redesign. This redesign integrates nature-based solutions, enhancing the system's effectiveness and climate resilience with limited territorial possibilities. By comparing various design approaches, this research demonstrates that incorporating nature-based infrastructure at residential and subwatershed levels substantially improves flood mitigation and increases precipitation retention capabilities, making traditional infrastructure developments unnecessary. The findings underscore the need for innovative, adaptive infrastructure solutions. Implementing nature-based solutions mitigates flooding and contributes to resilient, sustainable urban water management systems that are better prepared to handle the challenges of a changing climate. This study underscores the critical importance of innovative infrastructure solutions and the positive benefits of nature-based solutions in fostering resilient and climate-adaptive urban water management systems in cities with small open spaces, rapid population growth, and scarce financial resources.

Open Access: Yes

DOI: 10.3303/CET24114172

Sensitivity Analysis of SAC 305 Solder Polycrystal Mechanical Parameters and Predicted Fatigue Lifetime with Different Grain Structures

Ambrus Zelei Antal Bakonyi Levente Bodnár

Publication Name: Applied Sciences Switzerland

Publication Date: 2026-01-01

Volume: 16

Issue: 2

Page Range: Unknown

Description:

The microstructural behaviours of solder joints during thermomechanical stresses are still not fully understood, and the thermomechanical reliability of solder joints remains a research area for scientists. In many cases, the solder material is modelled as a homogeneous material in Finite Element-based lifetime estimation calculations, while the microstructural effects are neglected. The development of virtual lifetime estimation methods is required; these methods should involve grain structure and therefore provide accurate results for a variety of test cases under thermomechanical loading. This paper presents a meso-scale analysis of lead-free SAC305 solder polycrystals using DAMASK modelling of the grain structure of the solder material and emulating mechanical loading while investigating the mechanical response of the polycrystal. Our finding is that the orientations and grain sizes of the solder polycrystal have significant effects on the mechanical parameters, and these microstructural parameters could not be neglected, because the impact of these also has a very relevant impact on the estimated lifetimes.

Open Access: Yes

DOI: 10.3390/app16020704

DNA extraction and STR profiling from histological slides

Viktor Soma Poór Gabor Kovacs Vivien Fejes Marah Alhabahbeh Zsolt Pádár

Publication Name: Forensic Science International Genetics Supplement Series

Publication Date: 2022-12-01

Volume: 8

Issue: Unknown

Page Range: 176-177

Description:

Formalin-fixed paraffin-embedded (FFPE) tissue blocks are commonly used in the field of pathology and forensic pathology as a source of histological slides. For postmortem kinship analysis or identification, DNA can be extracted from blocks with specialized kits. However, when an STR profile should be generated from single microscope slides, the removal of the coverslip and the limited sample size poses unique challenges. We aimed to test the effectivity of agitated xylene incubation to dissolve the mounting material to facilitate the coverslip removal. DNA extraction tests were performed on 5- to 7-year-old histological slides. Xylol was used to dissolve the mounting medium to facilitate cover slide removal, one set of samples was shaken during incubation, and the other set was left still. It was found that shaking the sample while bathed in xylol decreased the incubation time from three days to two days. Agitation not just reduced the processing time but increased the quality of acquired STR profiles: on average 30% more alleles were detected from the shaken samples compared to the still bathed ones.

Open Access: Yes

DOI: 10.1016/j.fsigss.2022.10.026

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