Papers by Dimitri Konstantas
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The continuous technological advances in networking and multimedia systems stimulate the integrat... more The continuous technological advances in networking and multimedia systems stimulate the integration of real-time interactive telelectures as an imponant service of a telelearning environment. Real-time interactivity is a key technological factor for the success and dissemination of telecourses. CUI (Centre Universitaire lnformatique) at the University of Geneva and GMO (the German National lnstitute for lnformation Technology) at Bonn run real-time interactive telelectures on a regular basis for one academic year. In this paper we describe the experience we gained out of the experiment, design issues we investigated and technical problems we had to deal with
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University of Tampere eBooks, 2007
This volume contains all accepted papers of the ERCIM Workshop on eMobility, which has been held ... more This volume contains all accepted papers of the ERCIM Workshop on eMobility, which has been held in Coimbra, Portugal, on May 21, 2007. Papers from three main areas have been selected for the workshop. The workshop papers discuss several topics of the ERCIM eMobility working group, namely – Traffic engineering and mobility management – Wireless (sensor) networks – Pervasive computing and mobile applications. The goal of the ERCIM workshop is to foster collaborative work within the European research community and to increase co-operation with European industry. Current progress and future developments in the area of eMobility should be discussed and the gap between theory and application should be closed.
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Journal of Ambient Intelligence and Humanized Computing, Jun 11, 2018
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Procedia Computer Science, 2017
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Technological and Economic Development of Economy
Supply chain management (SCM) has gradually evolved beyond the straightforward logic of benefits ... more Supply chain management (SCM) has gradually evolved beyond the straightforward logic of benefits and economic viewpoints. Supplier selection and performance evaluation are the crucial strategic components of any SCM system with a substantial economic impact and risk reduction. Several conflicting factors make supplier selection a challenging multi-criteria decision-making problem. This paper introduces a method called alternative ranking with the elected nominee (ARWEN) to select suppliers in Iran’s dairy product chain store. The primary principle of ARWEN is to choose the best alternative based on the lowest change rate rather than the elected nominee. Four extensions of the ARWEN method are proposed depending upon the nature and level of information available to the decision-makers. A fifth extended version termed E-ARWEN is also recommended to consider the negative form of the elected nominee. Two novel statistical tools, the ranking performance index and the Zakeri-Konstantas di...
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Scientific Reports
A large number of materials and various criteria fashion material selection problems as complex m... more A large number of materials and various criteria fashion material selection problems as complex multi-criteria decision-making (MCDM) problems. This paper proposes a new decision-making method called the simple ranking process (SRP) to solve complex material selection problems. The accuracy of the criteria weights has a direct impact on the outcomes of the new method. In contrast to current MCDM methods, the normalization step has been eliminated from the SRP method as a potential source of producing incorrect results. The application of the method is appropriate for situations with high levels of complexity in material selection because it only considers the ranks of alternatives in each criterion. The first scenario of vital-immaterial mediocre method (VIMM) is used as a tool to derive criteria weights based on expert assessment. The result of SRP is compared with a number of MCDM methods. In order to evaluate the findings of analytical comparison, a novel statistical measure know...
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2023 15th International Conference on Computer and Automation Engineering (ICCAE)
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Information
In this paper, a new multicriteria decision-making (MCDM) method, called a measure for informatio... more In this paper, a new multicriteria decision-making (MCDM) method, called a measure for information values connected to the equilibrium points (IVEP) method, and a new statistical measure for measuring the similarities of performances of MCDM algorithm outputs in a comparison process, called the Zakeri–Konstantas performance correlation coefficient, are introduced. The IVEP method uses Shannon’s entropy as the primary tool to measure the information embedded in the decision matrix in order to evaluate the decision’s options/alternatives for complex decision-making problems with a large number of criteria and alternatives. The second concept that drives the IVEP method is the equilibrium points, which signify the points in a vector space where scores for the decision’s options/alternatives are equilibrated. Instead of using linear functions to compute similarities between the data sets generated by the MCDM algorithms by the calculation of the distance using different methods, the Zak...
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Journal of the Operational Research Society
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During the past few years many projects and initiatives were undertaken deploying and testing aut... more During the past few years many projects and initiatives were undertaken deploying and testing automated vehicles for public transportation and logistics. However in spite of their ambition, all of these deployments stayed on the level of elaborated experimentation deploying no more than 4 maximum 5 AVs in rather small sites (few Kms of roads) and never really reached the level of large scale “commercial” deployment of transport services. The reasons for this are many, but the most important being the lack of economically viability and commercially realistic models, the lack of scalability of the business and operating models, and the lack of inclusive citizen/user centric services required for the large end-user acceptation and adoption of the solutions. In this paper, based on the experience gained in the H2020 AVENUE project, we present the missing pieces of the puzzle, ad which will be addressed in the Horizon Europe project ULTIMO.
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SSRN Electronic Journal
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Processes
Supply chain management begins with supplier evaluation and selection. The supplier selection dea... more Supply chain management begins with supplier evaluation and selection. The supplier selection deals with various criteria with different contexts which makes it a complex multi-criteria decision-making (MCDM) method. In this paper, a novel MCDM method, called the alternative ranking process by alternatives’ stability scores (ARPASS), is proposed to solve supplier selection problems. ARPASS considers each alternative as a system that is constructed on integrated components. To perform properly, a system requires high integrity and stability. ARPASS utilizes the stability of alternatives as an effective element for ranking the alternatives. The ARPASS is developed in two forms, ARPASS and ARPASS*. The new method utilizes standard deviations and Shannon’s entropy to compute the alternatives’ stabilities. In this paper, in addition to the new MCDM methods, a new method called the grey equilibrium product (GEP) is introduced to convert grey linguistic variables into crisp values, using d...
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2018 First International Conference on Artificial Intelligence for Industries (AI4I), 2018
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Multiple Criteria Decision Making, 2022
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Mathematics, 2022
In this paper, a new strategic analysis method is introduced, called the ten-element analysis (TE... more In this paper, a new strategic analysis method is introduced, called the ten-element analysis (TEA) method to determine the firm’s strategic position in the market. The new method is grounded on the computation of the reflections of the external factors on the firm’s internal factors through the changes of the values of the internal factors throughout the time when a lack of complete information regarding the environmental factors exists. The TEA method takes ten effective key elements of the firm into account and investigates their changes through a maximum of nine periods and a minimum of two periods. To conduct the model, the paper is mainly focused on four main rubrics, including the detection of the reflection of the firm’s environmental factors on the internal factors, deriving the strategic position of the firm from the reflections, the capability of the existing strategic models in determining the strategic position from the reflections in presence of uncertainty and incompl...
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Expert Systems with Applications, 2022
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2017 IEEE SmartWorld, Ubiquitous Intelligence & Computing, Advanced & Trusted Computed, Scalable Computing & Communications, Cloud & Big Data Computing, Internet of People and Smart City Innovation (SmartWorld/SCALCOM/UIC/ATC/CBDCom/IOP/SCI), 2017
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Papers by Dimitri Konstantas