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Found 6374 publications

Measurement and analysis of logistic stresses in packaging with a carrying handle

No authors available

Publication Name: 18th IAPRI World Packaging Conference

Publication Date: 2012-12-01

Volume:

Issue:

Page Range: 347-354

Description:

Carrying handles of packagings have a great importance in the comfortable and safe handling of packed products. Producers and consumers have to face occasionally damaged carrying handles that considerably increase the possibility of the damage of the product. These carrying handles are of a wide variety, depending on the package size, packaging material, weight, etc. The main reason for frequent product damages is due to the fact that producers lack the sufficient knowledge of stresses. In this paper we analyze the stresses and propose a measurement process for packaging with a carrying handle. We measure the stresses via a range of standard equipment (cameras, accelerometers, shaker table). In addition, we provide a general framework and the description of a test environment for the accurate reproduction of the logistic stresses appearing in packaging with a carrying handle.

Open Access: No

DOI: DOI not available

Adjacent-Channel Compatibility Analysis of International Mobile Telecommunications Downlink and Digital Terrestrial Television Broadcasting Reception in the 470–694 MHz Frequency Band Using Monte Carlo Simulation

Péter Vári Hussein Taha Szilvia Nagy

Publication Name: Electronics Switzerland

Publication Date: 2024-02-01

Volume: 13

Issue: 3

Page Range: Unknown

Description:

This paper delves into the imperative need for coexistence and compatibility in the 470–694 MHz frequency band, as mandated by the World Radiocommunication Conference 2015 (WRC-15) and the WRC-23. It focuses on challenges in the coexistence of Digital Terrestrial Television Broadcasting (DTTB) and International Mobile Telecommunications-2020 (IMT-2020) services in downlink-only mode, particularly in adjacent-channel scenarios. Using Monte Carlo simulations, the study evaluates the probability of interference from IMT base stations with DTTB reception. The analysis thoroughly investigates the impact of the IMT transmitter’s Adjacent Channel Leakage Ratio (ACLR) and the DTTB receiver’s Adjacent-Channel Selectivity (ACS) on the probability of interference. The results demonstrate a significant degradation in the DTTB reception probability at the edge of coverage based on standard assumptions. To address these challenges, this paper provides recommendations for mitigating interference. These include defining enhanced ACLR regulations for IMT base stations, implementing antenna discriminations, providing specialized filters, and establishing national coordination procedures. The research provides valuable insights for informed decision making in spectrum management within the 470–694 MHz band, aiming to facilitate the coexistence of DTTB and IMT-2020 services, in line with international regulations and best practices.

Open Access: Yes

DOI: 10.3390/electronics13030575

The Method of Fundamental Solutions Combined with a Multi-level Technique

Csaba Gáspár

Publication Name: Lecture Notes in Computer Science Including Subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics

Publication Date: 2019-01-01

Volume: 11386 LNCS

Issue: Unknown

Page Range: 241-249

Description:

A traditional idea of the Method of Fundamental Solutions is to use some external source points where the fundamental solution should be shifted to. However, the proper definition of the locations of the sources can hardly be performed in an automated way. To circumvent this difficulty, in this paper, the source points defined along the boundary, and the collocation points are shifted to the interior of the domain together with a proper modification of the boundary conditions. Thus, the problem of singularity is avoided. The modified boundary conditions are defined on the basis of the tools of the classical finite difference methods. Several schemes are presented. The schemes can be embedded in a multi-level context in a natural way. The proposed method avoids the computational difficulties due to ill-conditioned matrices and also reduces the computational complexity of the Method of Fundamental Solutions.

Open Access: Yes

DOI: 10.1007/978-3-030-11539-5_26

New energy management and hybrid energy storage for metro railcar

No authors available

Publication Name: 26th Electric Vehicle Symposium 2012, EVS 2012

Publication Date: 2012-12-01

Volume: 4

Issue:

Page Range: 2734-2742

Description:

This paper focuses on the use of model and simulation one of renewable energy. In this paper the results of simulation models by Matlab-Simulink for an urban-metro railcar and some newer methods for reducing the need value of capacitance for energy storage in cooperation by a Li-ion battery are presented. In this research was been investigated the Li-ion battery and the supercapacitor as hybrid energy storing device for the same task and its effectivness under operation of a suitable energy control system. The available decreasing ratio of the needed energy storage at case SCAP is 25 % to 40 % with this improved energy control method, which are significant values as decreasing in volume, mass and price. Mass reduction of our hybrid storage system is significant, about 60%.

Open Access: No

DOI: DOI not available

The application of fuzzy connectives and inverse operations on R-fuzzy descriptors of the static conditions of residential buildings

Adam Bukovics Laszlo T. Koczy

Publication Name: Cinti 2012 13th IEEE International Symposium on Computational Intelligence and Informatics Proceedings

Publication Date: 2012-12-01

Volume: Unknown

Issue: Unknown

Page Range: 433-437

Description:

A considerable part of the current stock of residential buildings in Budapest was built at the end of the 19th and in the beginning of the 20th century (Figure 1). In the course of our research work a great many detailed technical and static expert reports on residential buildings in Budapest built in this time period were available. On the basis of these expert reports a database was created for the purpose of analysis of the structure of the buildings and of building diagnostics (Figure 2), and in order to prepare a fuzzy signautre-based status defining and ranking model. The database was created by processing a reliable set of data, which, in this way is a large representative pattern, the analysis whereof enables us to draw scientific conclusions. So far nobody has processed the expert reports from the scientific point of view, so no synthetised results were available to date. © 2012 IEEE.

Open Access: Yes

DOI: 10.1109/CINTI.2012.6496805

Calibration of Two Novel Segmentation Approaches by Synthetic Road Vehicle Vibrations

Peter Foldesi László Róbert Hári

Publication Name: Tehnicki Vjesnik

Publication Date: 2024-01-01

Volume: 31

Issue: 6

Page Range: 2094-2101

Description:

Simulation of non-stationary random vibrations has motivated Packaging vibration testing for decades. Often, an event-detection algorithm decomposes Road vehicle vibrations when analyzing the recorded series. However, heuristics and subjective justifications are often in the papers, whereby the foremost concern is the validation of the non-stationarity of simulated signals. Furthermore, if a changepoint detection is inherent to the procedure, it is recommended to calibrate the detector. The current paper concerns the Receiver operating characteristics (ROC) of two novel algorithms and provides contextual support by Segment length distributions (SLD).

Open Access: Yes

DOI: 10.17559/TV-20220114115149

Analysis of the WRC-23 Agenda Item Concerning the Future Use of the 470-694 MHz Band in Europe

Péter Vári Hussein Taha Szilvia Nagy

Publication Name: Infocommunications Journal

Publication Date: 2023-01-01

Volume: 15

Issue: 3

Page Range: 2-10

Description:

The upcoming World Radiocommunication Conference 2023 (WRC-23), according to the preliminary agenda item 1.5, will decide the long-term use of the 470-694 MHz band in International Telecommunication Union Region 1 and consider regulatory actions for the rest of the decade. This article attempts to inform the debate on the future use of spectrum in the 470- 694 MHz band and the status of broadcasting services at the European level and in many individual member states. This article highlights the role WRCs played by allocation of the previous digital dividend bands for mobile services. It provides an overview of the most recent trends and developments of existing services in the sub-700 MHz band. The article also explores and analyzes options for future use of the 470-694 MHz band in Europe and discusses the benefits and implications of adopting each option. Based on this analysis, it is recommended to introduce a secondary allocation to mobile service in the downlink-only mode alongside traditional broadcasting services in the sub-700 MHz band at the upcoming WRC-23.

Open Access: Yes

DOI: 10.36244/ICJ.2023.3.1

Beyond land use: Understanding variations in topsoil bulk versus recalcitrant organic matter

Tibor Filep Gabriella Darabos Csaba Centeri Zsuzsanna Angyal Balázs Madarász András Bidló Viktoria Vona Ákos Bede-Fazekas Gábor Szatmári Dóra Zacháry Csilla Király Máté Karlik Anna Vancsik Thulfiqar Al-Graiti Malihe Masoudi Zoltán Dévény Zoltán Szalai Gergely Jakab

Publication Name: Catena

Publication Date: 2024-09-01

Volume: 244

Issue: Unknown

Page Range: Unknown

Description:

Soil organic matter (SOM) concentration and composition are essential properties that affect most functions and ecosystem services. The relationship between soil and environmental covariates regarding SOM concentration and composition in various pools is not completely understood. This study aimed to identify the most influential drivers of SOM stabilization, focusing on arable lands in Hungary. Hungary is an ideal area for investigating SOM variability because it is at the meeting point of the three main climate effects that trigger a wide range of soil, land use, and topographical conditions. Overall, 87 soil samples were taken from the topsoil (2–20 cm) and fractionated (<20 µm) to separate the mineral phase-associated organic carbon (MAOC) and bulk pools. MAOC concentration varied on a wide range (0.5–14.1 %) and was the function of bulk SOM aromaticity and slope steepness, rather than land use, climatic conditions, or soil properties, indicating that MAOC is also affected by decomposition if the bulk OM is less available for the microbiome. Land use, especially in forest topsoils, reflects the elemental composition of the OM, focusing on the variations of residue composition. In contrast, aromaticity is rather related to soil and climate properties, suggesting increased relevance of transformation processes. As a consequence, SOM composition varies on a wide range in the topsoil, however, the lack of a definite trend at the county level suggests the complexity of the system and highlights the role of local circumstances.

Open Access: Yes

DOI: 10.1016/j.catena.2024.108232

Modeling the intuitive decision-maker’s mindset

Beatrix Bókayné Andráskó Jolán Velencei Ágnes Szeghegyi Zoltán Baracskai

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2019-01-01

Volume: 16

Issue: 3

Page Range: 227-240

Description:

Today, the term, Working Memory, is closely associated with intelligence. We propose that in addition to improving and speeding-up analysis, Artificial Intelligence (AI) can also be useful as a supplement to Working Memory. It is generally accepted that working memory plays a crucial role in cognition and models by computers, can help us understand the human mind. Building an artificial working memory can bring further benefits; for example, it can separate retrieval from reasoning and therefore, can acquire new concepts. The aim of this research is to solve the capacity shortage problem of Working Memory, by using AI as a supplement. In order to develop our argument, we characterize the ID3 algorithm as a way of looking for a consistent solution in the existing Case Based Graph; as the ID3 algorithm builds it from an empty graph, to an increasingly complex one. Methodologically, our study is based on observation of several Digital Natives (DNs) playing different games at Mobilis Interactive Exhibition Center in Gyor, Hungary. The aim is to explore the behavior of the DN generation. By identifying the different mindset patterns of DNs, we will be able to observe how different DNs can be facilitated, to enjoy the games, rather than being bored, anxious or even, becoming addicted.

Open Access: Yes

DOI: 10.12700/APH.16.3.2019.3.12