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Found 6334 publications

Innovative Thermal Insulations from Cornstalk and Cereal Straw for Sustainable Architecture

David Bozsaky

Publication Name: Chemical Engineering Transactions

Publication Date: 2024-01-01

Volume: 114

Issue: Unknown

Page Range: 841-846

Description:

Nowadays, architects are increasingly prioritising sustainability, leading to the rise in the popularity of construction products made from renewable raw materials. Using thermal insulation materials has become crucial to ensure the energy-efficient operation of buildings. In the building materials market, especially in the field of thermal insulation products, there is a growing interest in products made from natural, renewable raw materials. This is because their use can reduce the energy consumption of buildings but also the CO2 emissions of the construction industry. There is an urgent need to utilise various industrial and agricultural by-products. In Hungary, a large amount of cereal straw and cornstalks are not used or are burned, which increases CO2 emissions. Using them as a construction product would be an excellent alternative solution for reducing the greenhouse gas emissions of the construction industry. In recent years, there have been two attempts to produce building insulation materials from cornstalks and cereal straws. As part of comprehensive research, a laboratory qualification test of both products was carried out. Based on the evaluation of the results, both thermal insulation products seem promising. Their material properties support their applicability in building construction, although some limitations should be considered. This paper aims to present the two experimental products mentioned above, analyse their material properties, and evaluate their applicability in the construction industry.

Open Access: Yes

DOI: 10.3303/CET24114141

Examination of the Load’s Effect on Fuel Consumption and CO2 Emissions, in the Case of a Diesel and LNG Powered Tractor †

Gergő Sütheö Marton Jagicza Gabor Laszlo Toth Balázs Baráth

Publication Name: Engineering Proceedings

Publication Date: 2024-01-01

Volume: 79

Issue: 1

Page Range: Unknown

Description:

This study compares the environmental impacts of diesel and LNG-powered tractors under varying loads, by utilizing a cost-effective measurement system on the ZalaZONE Proving Ground. The same test cycles and scenarios were conducted with both trucks simultaneously on the closed test track modules and the research highlights LNG’s advantages in reducing CO2 emissions, particularly under lower load conditions. This innovative approach, based on the fuel consumption rather than expensive exhaust gas analyzers, underscores LNG’s potential in meeting EU emission targets. The results support LNG as a competitive and sustainable alternative to diesel, promoting greener freight transport solutions for the future.

Open Access: Yes

DOI: 10.3390/engproc2024079017

Storage Location Assignment in Indirect-Access Storage Systems

Tamás Hartványi Zoltan Andras Nagy Miklós Szabó

Publication Name: Lecture Notes in Logistics

Publication Date: 2024-01-01

Volume: Part F3450

Issue: Unknown

Page Range: 172-185

Description:

A common solution in warehouses is to provide direct access to products due to various service policies. The construction of such warehouses is quite expensive due to the extensive service roads required, but at the same time, in accordance with the Pareto principle, most of the variety of materials does not justify the provision of direct access. We believe that similar dynamics could be achieved on a smaller area with the right operation of an indirect access storage system, as if direct access were provided to all stored units. Meanwhile, the high variety of products and the low accessibility make it a challenge in selecting and implementing the right operation method. The efficiency is influenced by the layout of the warehouse, the assignment of stored units to storage locations, and the operating processes. We conducted simulations to examine these; the results will be presented here. The design of the warehouse and the stochastic material flow was not changed during the examinations; the initial arrangements of the stored materials and the procedures for their movement were built according to several aspects. This revealed how these factors affect efficiency, the computational capacity needed, and the mutual influence they exert.

Open Access: Yes

DOI: 10.1007/978-3-031-70977-7_10

Perspective of Created Value in Consumer Choice: Comparison of Economic and Ecological Dimensions

Jakub Kubiczek Bartłomiej Hadasik Dominika Krawczyńska Kornelia Przedworska Aleksandra Ryczko Erika Zsuzsanna Madarász

Publication Name: Sage Open

Publication Date: 2024-01-01

Volume: 14

Issue: 1

Page Range: Unknown

Description:

This paper aims to identify and categorize the factors influencing consumer goods’ value into ecological and economic dimensions and subsequently compare them. The analysis employs the Allegro Reviews (AR) dataset, comprising post-purchase product reviews, with a focus on a sample of 1,400 randomly selected reviews from a pool of 10,615 comments. Through this examination, distinct influencing factors are identified, categorized as either ecological or economic, and their frequency of reference in online reviews was compared. The research findings show that consumers consistently address economic dimensions in their reviews. Notably, emphasis is placed on goods’ quality, pricing, and the price-quality relationship. On the other hand, ecological aspects receive limited attention in reviews, suggesting their lesser significance to consumers compared to economic considerations. This study’s implications for theory and practice indicate that companies should prioritize economic aspects in their value creation endeavors, relegating ecological factors to a secondary role. However, from a global standpoint, enterprises must incorporate ecological dimensions during the value creation process to avert environmental degradation, which could otherwise undermine overall societal quality of life. In terms of originality and value, this research diverges from typical consumer choice studies that rely on questionnaires. Instead, it analyzes actual post-purchase product reviews, providing insights into tangible elements contributing to goods’ value, thus bypassing reliance on mere declarations. JEL Classification: D11, D12, L25, L26.

Open Access: Yes

DOI: 10.1177/21582440241238516

Investigation of Tooth Friction Conditions of Electric Vehicle Gearbox with Plastic Gears †

József Polák

Publication Name: Engineering Proceedings

Publication Date: 2024-01-01

Volume: 79

Issue: 1

Page Range: Unknown

Description:

Earlier, I created a mathematical model of the gear unit, in which the value of the tooth friction was determined during precalculation and then entered into the model as a constant parameter. In this paper, I investigate how much viscosity oil is required at different operating points for a single-stage gear unit with plastic gears to function properly and how this affects the tooth friction and, hence, the loss of energy in the gear unit. Once the investigations are complete, the tooth friction is determined using an automated MATLAB function, which allows the tooth friction to be re-determined at each operating point. This allows for a more accurate strength dimensioning of the plastic gears in the gear unit and a more accurate model describing the gear unit’s behaviour.

Open Access: Yes

DOI: 10.3390/engproc2024079085

Combined Effect of Nano Ferrite and Nano Silica on Properties of Cement Mortar

Rasha R. Rawdhan Azhar J. Bohan Ghaed K. Salman Muhanad Al-Jubouri

Publication Name: International Journal of Integrated Engineering

Publication Date: 2024-01-01

Volume: 16

Issue: 1

Page Range: 350-360

Description:

This study investigates the effects of adding nano-ferrite (N.F.) and nano-silica (N.S.) on the mechanical and biological properties of mortar. By assessing four water-to-cement ratios (1–4%), the ideal nanoparticle doses were determined. Results indicated that both N.F. and N.S. significantly increased the mortar’s strength at ratios between 1% and 4%, while combinations of N.F. and N.S. improved strength up to 3% and 4% substitution, respectively. The mechanisms of strength enhancement were attributed to nanoparticles acting as fillers and hydration accelerators, which densify the mortar microstructure and promote the production of calcium silicate hydrate (C-S-H) gels. In terms of biological properties, the study examined the antibacterial effects of nano-silica and nano-ferrite. Nano-silica demonstrated greater antibacterial potency against all bacterial strains assessed. Both materials exhibited a stronger antibacterial impact on Gram-positive bacteria (Staphylococcus aureus) compared to Gram-negative bacteria (Escherichia coli), due to differences in cell wall structures. The study emphasizes the importance of optimal nanoparticle dosages and identifies limitations that warrant further research, such as durability and potential downsides at higher concentrations. Despite these challenges, the findings underscore the potential of nanoparticles to enhance mortar performance and suggest promising applications in construction and the development of antibacterial materials. Future research should focus on overcoming these constraints and exploring the practical applications of nanoparticle-enhanced mortar in real-world scenarios.

Open Access: Yes

DOI: 10.30880/IJIE.2024.16.01.030

Parliaments in Europe-International Conference on the Occasion of Day of Parliamentarianism

László Tóth Viktória Verebélyi

Publication Name: International Journal of Parliamentary Studies

Publication Date: 2024-01-01

Volume: 4

Issue: 2

Page Range: 268-273

Description:

The Centre for Parliamentary Research at the Ferenc Deák Faculty of State and Law of Széchenyi István University organized between 9-10. May 2024 for the ninth time this year an overview of Hungarian and international parliamentary research within the framework of the Day of Parliamentarianism conference series. On the first day of the two-day international conference "Parliaments in Europe", researchers shared their research results in Hungarian, while on the second day, attendants could listen to lectures in English.

Open Access: Yes

DOI: 10.1163/26668912-bja10092

A Novel, Three-Stage Intelligent Fuzzy Traffic Signal Control System

Tamrat Delessa Chala Ĺaszĺo T. Ḱoczy

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2024-01-01

Volume: 21

Issue: 8

Page Range: 189-209

Description:

Traffic congestion is a serious issue for cities and urban areas, owing to the increasing usage of vehicles. This phenomenon results in several negative consequences, such as high fuel consumption and loss of time. To address this problem, several countries have implemented optimal traffic signal control systems. However, these systems have some drawbacks, such as the need for expensive hardware and maintenance difficulties. Because the sensors are buried under the road surface, the system often cannot account for the full length of the vehicular queue. This, among several issues, inhibits the full potential of the technology’s effectiveness and sustainability. In addition, there is much uncertainty in traffic conditions, which points to the need for a model that includes vagueness in the control system. This study proposes a novel hierarchical structure for a three-stage fuzzy traffic control system. This new system assesses the vehicle queue, identifies heavy traffic, detects emergency cars, and adjusts the duration of traffic lights according to the traffic flow and waiting times of vehicles using fuzzy inference rules. This controller was evaluated and validated using a micro-simulation model of an isolated intersection. The obtained results revealed the increased adaptability and flexibility of the proposed system owing to its potential to differentiate a random number of traffic directions. It is also able to handle emergency vehicles and can decrease waiting times, stalling fewer cars, if there is a high traffic flow in the conflicting direction(s) and is a robust and scalable system with lower computational costs.

Open Access: Yes

DOI: 10.12700/APH.21.8.2024.8.10

Performance Comparison of the General, the Dual, and the Joint Sigma Point Kalman Filters on State Estimation of Li-Ion Battery Cells for BMSs †

Tamás Horváth Denes Fodor

Publication Name: Engineering Proceedings

Publication Date: 2024-01-01

Volume: 79

Issue: 1

Page Range: Unknown

Description:

Li-ion batteries, known for high energy and power density, are widely used in electromobility and stationary applications. In these applications a Battery Management System (BMS) ensures safety and longevity by performing functions like cell balancing and protecting against overcharge and over-discharge. Advanced BMSs estimate the battery’s State of Charge (SOC), crucial for determining remaining operating time and safe range. This study compares three Kalman Filter (KF)-based SOC estimation techniques: the general Sigma Point KF (SPKF), the joint SPKF, and the dual SPKF, for state and parameter estimation of a Samsung 18650INR13L Li-ion battery.

Open Access: Yes

DOI: 10.3390/engproc2024079045