Bu çalışmada iş güvenliği risklerinin değerlendirilmesi için yeni bir hata türü ve etkileri analizi (HTEA) modeli önerilmiştir. Klasik HTEA’ya göre risk öncelik sayıları (RÖS), olabilirlik, şiddet ve ...fark edilebilirlik puanlarının çarpılmasıyla hesaplanır. Bununla birlikte, klasik HTEA tarafından oluşturulan RÖS değerleri literatürde ağır eleştirilere konu olmuştur. Bu çalışma klasik HTEA’nın dezavantajlarını aşmak için yeni bir Çok Kriterli Karar Verme (ÇKKV) modeli önermektedir. Önerilen risk değerlendirme modeli, tam tutarlılık yöntemini (FUCOM) ve çizge teorisi-matris yaklaşımını (ÇTMY) bulanık ortamda birleştirmektedir. Bulanık FUCOM yöntemi kullanılarak hata türlerinin risk puanları ve risk faktörlerinin ağırlıkları elde edilmiştir. Öte yandan, her hata modunun RÖS değeri bulanık ÇTMY kullanılarak hesaplanmıştır. Bulanık ÇTMY, risk faktörleri arasındaki tüm olası etkileşimleri göz önünde bulundurmakta ve böylece daha doğru sıralamalar üretmektedir. Karar vericilerin bulanık değerlendirmeleri en küçük kareler mesafe yöntemi kullanılarak toplanmıştır. Önerilen model, gerçek hayattaki bir vaka çalışmasında uygulanmış ve hata modları sıralanmıştır.
A systematic and efficient multimodal transfer-matrix approach is proposed for the comprehensive Bloch analysis of general 1-D/2-D/3-D periodic structures. We provide a linearization procedure for ...transforming the original nonlinear eigenvalue problem associated with 2-D/3-D structures to a standard one that can easily be solved without the need of a zero-searching algorithm in the complex plane. The proposed approach has been validated with bounded/open structures with complex geometries and/or inhomogeneous lossless/lossy materials. It demonstrates a significantly reduced computational time and leverages the strengths of full-wave simulators to deal with general problems and ad hoc quasi-analytical methods to give a fundamental understanding of the behavior of the structure. Also, it allows for an accurate evaluation of the imaginary part of the wavenumber, which offers information of material dissipation, stopband rejection, leakage, and complex modes.
Abstract
Ultrafast spin dynamics on femto- to picosecond timescales is simulated within a density-operator approach for a Co/Cu bilayer. The electronic structure is represented in a tight-binding ...form; during the evolution of the density operator, optical excitation by a femtosecond laser pulse, coupling to a bosonic bath as well as dephasing are taken into account. Our simulations corroborate the importance of interfaces for ultrafast transport phenomena and demagnetisation processes. Moreover, we establish a reflow from Cu
d
orbitals across the interface into Co
d
orbitals, which shows up prominently in the mean occupation numbers. On top of this, this refilling manifests itself as a minority-spin current proceeding several layers into the Cu region. The present study suggests that the approach captures essential ultrafast phenomena and provides insight into microscopic processes.
•Identify the primary challenges related to Industry 5.0 cybersecurity.•Determine the ranking among the challenges using GTMA.•Provide recommendations regarding critical aspects of Industry 5.0 ...cybersecurity.•Display the efficacy of the GTMA approach in the Context of Industry 5.0 related challenges.
The world is adopting the Industry 5.0 paradigm to increase human centricity, sustainability, and resilience in efficient, optimized, and profitable manufacturing systems. With benefits, however, come increased risks of economic and physical loss, driving the need for continuous improvement of Industry 5.0 cybersecurity. Implementation and advancement of adequate cybersecurity have created challenges that have been identified in the literature. In this study, key Industry 5.0 cybersecurity challenges and related sub-challenges are highlighted based on a literature review. Graph Theory and Matrix Approach (GTMA) is employed to analyze the challenges and determine relative importance based on permanent values of the variable permanent matrix (VPM). The results identify the most important Industry 5.0 cybersecurity challenges and reveal Industry 5.0 firms should primarily concentrate on supply chain vulnerabilities to decrease data loss and hacking in the organization's supply chain network. This study also recommends that executives and lawmakers acquire knowledge regarding cybersecurity challenges and prepare to deal with them. Addressing these and other subsequently prioritized challenges—the top five rounded out with emergent cybersecurity trends, non-availability of cybersecurity curriculum in education, embedded technical constraints, and absence of skilled employees and training—will lead the methodical development of holistic, robust cybersecurity programs. Firms accepting of this reality may implement such programs to mitigate evolving cyber-risk towards harnessing and sustaining the benefits of novel Industry 5.0 technologies.
•Priority areas that safeguard biodiversity and ecosystem services were identified.•A spatial prioritisation of biodiversity was done based on Marxan software.•The potential supply of ecosystem ...services was also identified in spatial design.•Results assisted in the design of a legally binding spatial planning instrument.•Practical recommendations were devised for in situ governance.
Securing biodiversity values alongside ecosystem services and other socio-economic assets, is a priority in the European policy and territorial planning. Here, we design a landscape planning approach that identifies priority conservation areas and informs on their ecosystem services’ potential in the context of a legally binding spatial planning instrument in central Portugal. Our approach included a spatial prioritisation approach of biodiversity, a literature review on the potential supply of ecosystem services, the participation of political stakeholders, and expert-based field validation in the Municipality of Alvaiázere. Firstly, we used the decision-support software Marxan to help prioritising biodiversity conservation efforts. Then, we evaluated the potential supply of multiple ecosystem services from a systematic literature review. Finally, we selected priority areas for landscape planning and management through a participatory approach with local politicians, considering the relevance of those areas to safeguard biodiversity assets alongside ecosystem services’ potential supply for the region. A total of nine priority areas, with both high biodiversity values and potential for ecosystem services’ supply, were identified. For the first time in the country, those areas have been considered in the design of the main spatial planning instrument for the region, together with practical recommendations for in situ management. Our approach represents a first step to engage local administration in the EU Biodiversity Strategy for 2030, focused on the protection and restoration of biodiverse areas with ecosystem services’ potential through legally binding landscape planning.
Recently, mapping a signal/image into a low rank Hankel/Toeplitz matrix has become an emerging alternative to the traditional sparse regularization, due to its ability to alleviate the basis mismatch ...between the true support in the continuous domain and the discrete grid. In this paper, we introduce a novel structured low rank matrix framework to restore piecewise smooth functions. Inspired by the total generalized variation to use sparse higher order derivatives, we derive that the Fourier samples of higher order derivatives satisfy an annihilation relation, resulting in a low rank multi-fold Hankel matrix. We further observe that the SVD of a low rank Hankel matrix corresponds to a tight wavelet frame system which can represent the image with sparse coefficients. Based on this observation, we also propose a wavelet frame analysis approach based continuous domain regularization model for the piecewise smooth image restoration. Finally, numerical results on image restoration tasks are presented as a proof-of-concept study to demonstrate that the proposed approach is compared favorably against several popular discrete regularization approaches and structured low rank matrix approaches.
Due to climate change and declining fossil fuel reserves, electric vehicles (EVs) are widely used for transportation. India, with its large population and limited fossil fuel storage, has a great ...opportunity for success in the electric car supply chain. The purpose of this study is to find out and analyze the challenges facing the lithium-ion batteries (LIBs) supply chain for EVs in India. In accordance with suggestions from Indian industrialists, academic experts, and non government organization (NGOs), a combined Multi Attribute Decision Making (MADM) technique of Delphi and Graph Theory and Matrix Approach (GTMA) is introduced to analyze the challenges for a sustainable LIB supply chain in EVs, where the novelty of the study lies. Experts reach a consensus using the Delphi method to select the main challenges, and the challenges are ordered according to their priority based on the single numeric index created by GTMA, a graph-theoretic approach. Sensitivity analysis is performed to validate the proposed model. The order of the challenges in the proposed model is compared with the other methods, namely weighted sum method (WSM), multi-objective optimization on the basis of ratio analysis (MOORA), and technique of order performance by similarity to ideal solution (TOPSIS) to check the authenticity of the result. The findings can be applied to developing nations with comparable technology and technical restrictions. It will assist decision-makers in formulating policies for sustainable transportation networks.
•A fuzzy GTMA approach is proposed for ranking renewable energy sources (RES).•Finalize 21 barriers to adopting RES from the literature and expert opinion.•Rank the RES based on the impact of the barriers to adopting them in India.•Perform sensitivity analysis to check the consistency of the order of importance.•Managerial implications and suggestions are provided as research direction.
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