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Found 6273 publications

New energy management of capacitive energy storage in metro railcar by simulation

I. Szenasy

Publication Name: 5th IEEE Vehicle Power and Propulsion Conference Vppc 09

Publication Date: 2009-12-23

Volume: Unknown

Issue: Unknown

Page Range: 181-187

Description:

This paper focuses on the use of modeling and simulation of a renewable energy. The capacitive energy storages contribute to the rapid energy recovery associated with regenerative braking in electric vehicles. This power system allows the acceleration and deceleration of the vehicle with a lower loss of energy. Short-distance passenger traffic on electrified lines is a domain where brake energy recuperation might reduce the total energy consumption significantly. In this paper the results of simulation models by Matlab-Simulink for an urban-metro railcar and some methods for reducing the needed value of capacitance are presented. The aim of the new management of the energy storage system for decreasing the needed value of capacitance and improving the system performance is presented. © 2009 IEEE.

Open Access: Yes

DOI: 10.1109/VPPC.2009.5289852

Effect of Thymus vulgaris L. essential oil and thymol on the microbiological properties of meat and meat products: A review

E. Lakatos V. Kapcsándi Babett Greff Miklós Posgay

Publication Name: Heliyon

Publication Date: 2022-10-01

Volume: 8

Issue: 10

Page Range: Unknown

Description:

Since foodborne diseases are often considered as one of the biggest public health threats worldwide, effective preservation strategies are needed to inhibit the growth of undesirable microorganisms in food commodities. Up to now, several techniques have been adopted for the production of safe and high-quality products. Although the traditional methods can improve the reliability, safety, and shelf-life of food, some of them cannot be applied without rising health concerns. Thereby, the addition of various phytochemicals has gained much attention during the last decades, especially for meat products that may be contaminated with pathogenic and spoilage organisms. Thyme (Thymus vulgaris L.), as an important medicinal and culinary herb, is a promising source of bioactive compounds that have a great impact on the microbiological stability of meat by suppressing the undesirable microflora. However, the use of these antimicrobials is still facing difficulties due to their aromatic properties and variable efficacy against targeted species. In this paper, we provide an overview on the potential effects of thyme essential oil (EO) and thymol as bio-preservative agents in meat products. Furthermore, this paper provides insights into the limitations and current challenges of the addition of EOs and their constituents to meat commodities and suggests viable solutions that can improve the applicability of these phytochemicals.

Open Access: Yes

DOI: 10.1016/j.heliyon.2022.e10812

Complex oncologic therapy for loco-regionally advanced breast cancer associated with long-lasting SARS-CoV-2 PCR-positivity

István Sipőcz Tamás Kullmann Márta Knausz Dániel Kollár András Drozgyik F. Tamás Molnár

Publication Name: Orvosi Hetilap

Publication Date: 2021-04-01

Volume: 162

Issue: 16

Page Range: 611-614

Description:

Mortality of COVID-19 is increased when certain co-morbidities, among others advanced malignancies are present. Deleterious effect of cytotoxic therapy, related to its immunosuppressive effect, may also be hypothesised. However, postponing or cancelling oncologic treatment, especially in younger patients with advanced and more aggressive tumors may worsen the prognosis. The case of a 39-year-old female patient is presented, who was diagnosed with loco-regionally advanced breast cancer during the pandemic. Primary systemic chemotherapy was started. The patient presented with acute respiratory tract symptoms during the fifth cycle and subsequently SARS-CoV-2 infection was diagnosed. Chemotherapy was cancelled. Symptoms resolved in three days after diagnosis. SARS-CoV-2 PCR remained positive up to day 43. Antihormonal therapy was introduced on day 19 and she underwent mastectomy with axillary lymph node dissection on day 51. Chemotherapy was reset postoperatively on day 82 with prophylactic G-CSF protection. No adverse event was observed throughout the treatment. Cytotoxic chemotherapy and surgery can be successfully delivered in breast cancer patients with prolonged asymptomatic SARS-CoV-2 PCR positivity, even without negative swab result. Individual optimisation of the therapy may require deviations from standard protocols. Closer multidisciplinary cooperation may contribute to the minimisation of both oncologic and infectious risks.

Open Access: Yes

DOI: 10.1556/650.2021.32192

A block-circulant preconditioner for domain decomposition algorithm for the solution of the elliptic problems by second order finite elements

Béla Kiss G. Y. Molnarka

Publication Name: Computing Systems in Engineering

Publication Date: 1995-01-01

Volume: 6

Issue: 4-5

Page Range: 369-376

Description:

A preconditioned conjugate gradient domain decomposition method was given Refs 1 and 2 for the solution of a system of linear equations arising in the finite element method applied to the elliptic Dirichlet, Neumann and mixed boundary value problems. We have proved that the construction can be generalized2 for higher order finite element method. Here we give a construction and theoretical investigation of preconditioners for second order finite elements. A method and the the results of calculation is given. The presented numerical experiments show that this preconditioner works well. © 1995.

Open Access: Yes

DOI: 10.1016/0956-0521(95)00039-9

Integrating the Internet of Things in the halal food supply chain: A systematic literature review and research agenda

Horst Treiblmaier Karen J. Hand Suhaiza Zailani Abderahman Rejeb Karim Rejeb

Publication Name: Internet of Things Netherlands

Publication Date: 2021-03-01

Volume: 13

Issue: Unknown

Page Range: Unknown

Description:

To address consumers’ concerns regarding food integrity, halal food businesses need to rethink their conventional supply chains and leverage new technologies. The emergence and proliferation of the Internet of Things (IoT) - the use of interconnected devices, sensors, and technologies to orchestrate, monitor, and optimize supply chain processes - holds innovative potentials for the halal food supply chain (HFSC). Despite the growing popularity in supply chain management and logistics, the potentials and challenges of IoT in the HFSC remain – unexplored and further research is required. Therefore, the goal of this paper is to address this knowledge gap and review IoT research within the context of HFSCs. To begin, over seventy-three (73) papers were analyzed using both bibliometric techniques and in-depth content analysis. The results reveal that IoT offers five major benefits for the HFSC; namely, traceability of products, enhancement of supply chain efficiencies, facilitation of livestock management, authentication of foods’ halal status, and monitoring of halal certifications. Several challenges were identified, including the technical limitations of IoT devices, technological immaturity, lack of user acceptance, and cost and regulatory barriers. The study's findings provide deeper insight into the current state of IoT research in the halal food literature, its development, challenges and future research avenues for scholars, policy makers and the HFSC community.

Open Access: Yes

DOI: 10.1016/j.iot.2021.100361

Experimental Investigation of Vibroacoustic Behaviour of an Automotive Turbocharger with Semi-floating Bearing

Balázs Rácz Péter Sass Márk Pesthy J. Rohde-Brandenburger

Publication Name: Lecture Notes in Mechanical Engineering

Publication Date: 2021-01-01

Volume: 22

Issue: Unknown

Page Range: 245-255

Description:

Due to the strict European emission standards and the constant aspiration for the higher power density, turbochargers became essential components of the modern internal combustion engines. Turbochargers are high-speed operating machines thus the design of the rotor and the bearing system requires special attention. The motions of the rotor are affected by several parameters, such as bearing design, clearances, structure of the surface and also the quality and the physical properties of the used lubricant. If the motions of the rotor are intensive in a wide rotational speed range, the bearing load increases, resulting in a reduced lifespan. The motion of the rotor induces vibrations, which leads to audible noise emission to the environment. In this article, the vibrations of a four-cylinder spark ignition engine’s turbocharger are presented, based on component test-bench experiments. Furthermore, the main vibration components and their influencing factors are briefly introduced. During the experiments, the noise and vibrations of the turbocharger have been measured with different viscosity grade oils from 20 °C to 140 °C inlet temperature. The results showed that the amplitudes of both the synchronous and subsynchronous vibrations changed significantly and the volumetric flow is highly dependent on the temperature. The effect of the changing oil temperature will be analyzed with an emphasis on the subsynchronous vibrations and the possible cause of the phenomenon will be presented. Finding the optimal parameters with the lowest possible vibration response could result in an extended lifetime and provides important information for the balancing process during production.

Open Access: Yes

DOI: 10.1007/978-981-15-9529-5_21

Humane-oriented CSR on social media: The roles of other-praising emotions and social justice values

Laszlo Vasa Tamas Sneider Sarah Mohammad Suleiman Alsyoof

Publication Name: Journal of International Studies

Publication Date: 2025-01-01

Volume: 18

Issue: 3

Page Range: 46-67

Description:

Despite their potential to enhance CSR communication effectiveness, research on customer responses to humane-oriented CSR appeals on social media remains limited. In particular, little attention has been paid to the role of otherpraising emotions-gratitude, elevation, admiration, and awe-in shaping the impact of online humane CSR initiatives. Thus, this paper aims to investigate how humane orientation in CSR posts predicts other-praising emotions and how these emotions mediate the relationship between CSR and customer behavioral intentions, including purchasing and social media engagement. Moreover, the moderating roles of social justice values and self-construal are examined. Data were collected via survey from Jordanian Facebook users and analyzed using moderation and mediation techniques. Results revealed that humane orientation positively affected other-praising emotions, which mediated the relationship between humane CSR and consumer behavior. Social justice values moderated emotional responses to CSR, while self-construal had no significant moderation effect on the emotion–behavior links. Addressing gaps in CSR communication literature, these findings emphasize the importance of humane CSR and moral emotions in driving successful CSR discourse on social media. They also provide practical insights to help firms select and communicate CSR practices that effectively achieve their business goals.

Open Access: Yes

DOI: 10.14254/2071-8330.2025/18-3/3

Integration of data-driven T-spherical fuzzy mathematical models for evaluation of electric vehicles: Response to electric vehicle market demands

Uttam Kumar Bera Dragan Pamucar Pinki Majumder Anirban Tarafdar Azharuddin Shaikh Dipayan Bhowmik Vladimir Simic

Publication Name: Renewable and Sustainable Energy Reviews

Publication Date: 2025-11-01

Volume: 223

Issue: Unknown

Page Range: Unknown

Description:

The rapid growth of the electric vehicle (EV) market necessitates advanced multi-criteria decision-making (MCDM) frameworks capable of integrating diverse quantitative and qualitative factors under uncertainty. Traditional MCDM approaches often struggle to capture the complexity and imprecision inherent in EV evaluations, particularly in dynamic contexts like India. To address this gap, this study proposes the T-Spherical Fuzzy (T-SF) MARCOS and T-SF MOORA methods, which utilize T-Spherical Fuzzy Numbers (T-SFNs) to enhance decision precision. T-SFNs extend conventional fuzzy models by independently incorporating degrees of membership, non-membership, and hesitation, enabling a more granular and realistic modeling of expert judgments. In the methodological construction, numerical criteria (e.g., battery capacity, charging time) are directly incorporated, while qualitative criteria (e.g., safety, comfort) are initially evaluated by four domain experts through linguistic assessments, subsequently transformed into T-SFNs for integrated evaluation and accurate criteria weighting. The developed models are then employed to rank ten EV alternatives across 21 comprehensive technical and consumer-centric criteria. Comparative analysis shows that T-SF MARCOS and T-SF MOORA achieve superior ranking accuracy, with a high mutual Pearson correlation of 0.71, while traditional SF methods like SF-WSM and SF-WASPAS exhibit negative correlations of −0.43 and −0.42, respectively. Sensitivity analyses—covering variations in criteria weights and additional criteria integration—confirm the robustness and stability of the frameworks, with rank reversal rates remaining below 10 % across all scenarios. This study presents a technically resilient, uncertainty-aware evaluation framework, offering strategic insights for advancing consumer-centric EV development.

Open Access: Yes

DOI: 10.1016/j.rser.2025.116008

Integrating nonlinear pile behavior with standard structural engineering software

János Szép Richard 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: 4

Issue: Unknown

Page Range: 2869-2872

Description:

It is common in the practice of bridge design to analyze the superstructure, substructure, and foundation components separately. Applying this kind of modeling, soil-structure interaction effects can only be approximated with moderate accuracy. The foundation stiffness can greatly influence the internal forces, stresses, and displacements of superstructure. This is especially true for portal frame and integral bridges. Better modeling of soil-structure interaction can use three-dimensional geotechnical FEM programs, where the true soil-stucture environment can be analyzed. It is possible to use nonlinear constitutive models; capable of modeling soil behavior accurately, however it is difficult, time consuming, and costly in day-to-day practice.

Open Access: Yes

DOI: DOI not available