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Publications - 6342

Geopolitical instability and environmental sustainability

Leila Dagher Muneza Kagzi Ángel Acevedo-Duque Vishal Dagar Amar Rao

Publication Name: Environmental Economics and Policy Studies

Publication Date: 2026-01-01

Volume: 28

Issue: 1

Page Range: 445-471

Description:

Geopolitical instability significantly impacts environmental sustainability, yet its role remains underexplored. This study investigates how geopolitical risk affects ecological footprints and carbon emissions, key proxies for environmental sustainability, using panel data from 27 countries (1990–2020). Panel quantile regression results show a significant relationship between increased geopolitical risk, ecological footprints, and carbon emissions, with coefficients ranging from 0.357 to 0.785 across quantiles in the case of ecological footprints and 0.939–1.961 for carbon emissions. We control the estimation for inflows of foreign direct investment, economic growth, environmental patents, stringency, trade, and population. Economic growth correlates with a decrease in environmental sustainability, while environmental sustainability demonstrates an inverse relationship with ecological footprint and carbon emissions. The findings have policy implications because they can guide policymakers to take risks emanating from geopolitical uncertainty, while formulating environmental policies. Moreover, addressing increased environmental innovation and enhancing coverage of carbon taxes can help maintain environmental sustainability.

Open Access: Yes

DOI: 10.1007/s10018-025-00451-6

A Human-Aided Evaluation Based on Distance from Average Solution Method for the Diagnosis of Skin Disease Using T-Spherical Fuzzy Information

Dragan Pamucar Khalida Jabeen Qaisar Khan Kifayat Ullah

Publication Name: Contemporary Mathematics Singapore

Publication Date: 2025-01-01

Volume: 6

Issue: 5

Page Range: 6689-6713

Description:

Disorders of the skin have been identified as skin diseases. These medical disorders may involve severe skin manifestations, including allergic reactions, frustration, and itching. Numerous skin disorders may be inherited, while other aspects may be caused by lifestyle. To diagnose the various skin disorders based on the symptoms of skin diseases, we introduce the novel idea of Interval-Valued T-Spherical Fuzzy Set (IV-TSFS) that significantly enhances the ability to handle vagueness and unpredictability in the data being gathered. The IV-TSFS takes the concept of T-SFS by incorporating Interval Values (IVs). This innovation greatly improves the capacity to represent and manage uncertainty because they offer a structured and flexible framework that captures real-world ambiguity, vagueness, and unpredictability as compared to other classical fuzzy models. In this article, we construct the extended conventional IV-TSF Evaluation based on Distance from Average Solution (EDAS) approach by using the conventional Evaluation based on Distance from Average Solution (EDAS) method and also identifying a wide range of possibilities and understanding the potential variability in outcomes, which is especially useful in Decision-Making (DM) scenarios. This method provides a balanced view of each alternative’s performance, helping decision-makers to rank and select the most suitable option effectively. It is the most powerful way to visualize and compare the performance of various alternatives in a structured and quantitative manner. Firstly, we briefly review the description of T-SFSs and IV-TSFSs and discuss the score function Ṩcr(₮), accuracy function Ἇcr(₮), and the basic Operational Laws (OLs) of IV-TSFVs. Next, we explain the extensive interventions of the extended conventional Interval-Valued T-Spherical Fuzzy (IV-TSF) EDAS method to cope with uncertain and unreliable information, which is especially useful in DM scenarios. Finally, a numerical example is provided to effectively diagnose the favorable skin disease based on the symptoms of skin diseases by using the IV-TSF EDAS approach, and several comparative results of our proposed model with other existing Aggregation Operators (AOs) are carried out to demonstrate the invaluable benefits associated with this strategy.

Open Access: Yes

DOI: 10.37256/cm.6520257503

The impact of covid-19 on the economy and sustainable e-commerce

Laszlo Vasa Judit Oláh Nicodemus M. Kitukutha

Publication Name: Forum Scientiae Oeconomia

Publication Date: 2021-01-01

Volume: 9

Issue: 2

Page Range: 47-72

Description:

This study aims to examine the impact of COVID-19 and sustainable e-commerce in Hungary and Kenya. COVID-19 has devastated the global economy, resulting in financial and job losses. Routine changes in spending have moved the focus from non-essential to essential items, due to the impact of COVID-19, the associated economic meltdown, and the deterioration of people’s physical and mental health. However, e-commerce can be a better option to stop the spread of COVID-19 due to its real benefits and usefulness in solving the challenges faced. The methodology used in this paper is the collection of primary data from an online survey questionnaire, and secondary data from several databases,e.g.,the World Health Organisation (WHO) and Johns Hop-kins Centre websites. The results show the negative impact of COVID-19 on society and the economy, as well as the positive and significant effects ofthe growth of e-commerce during COVID-19, where most of the goods being purchased are medical supplies: masks, medicines, and food. This has been made possibleby the rise of e-commerce platforms as a link in sustainable e-commerce after the significant disruption to the worldwide supply chain due to total lockdown. E-commerce has shown growth during the COVID-19 pandemic period as a sustainable platform. In conclusion, this study proposes policies that support e-commerce in developing countries during and after COVID-19. Furthermore, theoretical, and managerial implications are proposed in the study. It is high time to warn businesses to adopt information and communications technology (ICT) to flourish and thrive during times of financial and economic hardship, such as the use of e-commerce with the right policies enacted to support sustainable e-commerce.

Open Access: Yes

DOI: 10.23762/FSO_VOL9_NO2_3

Hierarchical fuzzy decision support methodology for dangerous goods packaging design

Péter Böröcz Kata Vöröskoi Gergő Fogarasi Ĺaszĺo T. Ḱoczy

Publication Name: Studies in Computational Intelligence

Publication Date: 2020-01-01

Volume: 819

Issue: Unknown

Page Range: 1-7

Description:

In the field of logistics packaging (industrial-, or even customer packaging), companies have to take decisions on determining the optimal packaging solutions and expenses. The decisions often involve a choice between one-way (disposable) and reusable (returnable) packaging solutions. Even nowadays, in most cases the decisions are made based on traditions and mainly consider the material and investment costs, but many other aspects are important as well. Traditional (two-valued) logic is not suitable for modeling this problem, so the application of a fuzzy signature approach was considered. In a previous paper a fuzzy signature modeling the packaging decision was suggested, based on logistics expert opinions, in order to support the decision making process of choosing the right packaging system. The aim of this study is to improve the model and apply it for dangerous goods packaging.

Open Access: Yes

DOI: 10.1007/978-3-030-16024-1_1

The determination of the bitrate on twisted pairs by mamdani inference method

Ferenc Lilik Ĺaszĺo T. Ḱoczy

Publication Name: Studies in Computational Intelligence

Publication Date: 2014-02-03

Volume: 530

Issue: Unknown

Page Range: 59-74

Description:

There are several methods for predicting the available maximal data transfer rate on dedicated telecommunication connections. This chapter presents some generally used techniques for prediction and some results of a Mamdani-type fuzzy reasoning system that is used in a telecommunication research aimed to create new predicting methods. At the end of the article the results of various methods are compared. All presented techniques are used for evaluation of the twisted-pair based local loops of the telecommunication access networks. © Springer International Publishing Switzerland 2014.

Open Access: Yes

DOI: 10.1007/978-3-319-03206-1_5

Development of PA6/HDPE nanocomposite blends

Tamás Ibriksz János Stifter Endre Andersen Hajnalka Hargitai

Publication Name: Materials Science Forum

Publication Date: 2013-01-01

Volume: 729

Issue: Unknown

Page Range: 216-221

Description:

In our experiments polyamide 6/high density polyethylene blends (25/75 wt%) were produced and maleic anhydride grafted polyethylene was used as chemical coupling agent. To get finer microstructure and enhance the mechanical properties the blends were compounded by different nanostructured reinforcements. Two kinds of nanosilicate, the layered structure montmorillonite and the needle like sepiolite were applied in different concentrations and their effect on the mechanical and melting properties were examined. © (2013) Trans Tech Publications, Switzerland.

Open Access: Yes

DOI: 10.4028/www.scientific.net/MSF.729.216

Halal food supply chains: A literature review of sustainable measures and future research directions

John G. Keogh Abderahman Rejeb Karim Rejeb Kevin Dean

Publication Name: Foods and Raw Materials

Publication Date: 2021-01-01

Volume: 9

Issue: 1

Page Range: 106-116

Description:

Introduction. Although sustainability represents a high-profile topic in supply chain management, it remains an unexplored research area for Halal food supply chains (HFSCs). Hence, to bridge this knowledge gap, we conducted a systematic literature review to identify the measures necessary for the development of sustainable HFSCs and potential research gaps at the nexus of sustainability and Halal food literature. Study objects and methods. We carefully analyzed forty (40) papers selected from leading, highly-ranked journals to answer the following research question: “What are the measures necessary for the development of sustainable Halal food supply chains?” Results and discussion. The findings revealed that the improvement of Halal processes through the implementation of quality management systems, the effectiveness of Halal labeling, and the use of technology could enhance the economic performance of HFSCs. Furthermore, HFSC’s sustainability efforts are strengthened by enhancing trust and transparency benefitting human resource skills development, promoting animal welfare issues, and increasing regulatory compliance. The implementation of environmental protection measures is a primary driving factor for environmental sustainability activities. Environmental sustainability could be fostered by a shift to the application of greening practices and the support of environmentalism in the Halal food industry. Conclusion. The findings of this study provide critical managerial implications for Halal food practitioners as they can have a summary of the previous studies and thus use it as a benchmark for introducing sustainable measures in their Halal food firms.

Open Access: Yes

DOI: 10.21603/2308-4057-2021-1-106-116

Services of economic development organisations in GyŐr

Adrienn Reisinger Petra Kecskés Katalin Czakó

Publication Name: Deturope

Publication Date: 2017-01-01

Volume: 9

Issue: 3

Page Range: 85-100

Description:

Economic development of a municipality is highly depended on organizations and institutions, which services target local entrepreneurs and other economic actors. In the summer of 2015 we have collected and mapped the services of organizations with the function of economic development in the Hungarian city, Gyor. Through our research we could identify the services and the characteristics of linkages and cooperation of the economic development organizations (EDOs). Most important findings of the study are the followings: activity of the organizations has a wide range. Some of them are presented in more organizations at the same time. Level of diversification is quite low. Directions of cooperation are mainly based on personal or ad hoc relations. We conducted that EDOs know about each other, despite of this fact the number of linkages is low. In this paper we provide findings about Gyor, but the results can be used for other settlements' economic development, too.

Open Access: Yes

DOI: DOI not available

Robust reconfigurable control for in-wheel motor vehicles

Timea Fülep Péter Gáspár Andras Mihaly Zoltán Szabó Ferenc Szauter József Bokor

Publication Name: 2014 IEEE International Electric Vehicle Conference Ievc 2014

Publication Date: 2014-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

The paper deals with reconfigurable control of in-wheel electric vehicles. Basically the vehicle is controlled alone by the four electric engines mounted in the wheels of the vehicle. The goal is to design a control system with velocity and trajectory tracking ability realized by separate torque generation of the in-wheel motors. In critical driving situations when the yaw moment cannot be established with the four in-wheel engine alone, the high-level controller reconfigures the actuator inputs, thus steering intervention helps to stabilize the vehicle. Moreover, a multi-layer supervisory architecture for integrated control systems is also proposed. The operation of the vehicle is illustrated through a CarSim simulation example.

Open Access: Yes

DOI: 10.1109/IEVC.2014.7056232