İBRAHİM GÜRLER | BORA GÜNDÜZYELİ | Ozan Çakır

Makale | 2022 | systems

Distance metrics and their extensions are widely accepted tools in supporting distancebased decision making, consensus building, and preference aggregation systems. For several models of this nature, it may be necessary to elucidate the problem output in the original input domain. When a particular parameter of interest is desired to be produced in this original domain, i.e., the scale, the decision makers simply resort to constraints that function in parallel with this goal. However, there exist some cases where such a membership is guaranteed by the mathematical properties of the distance metric utilized. In this paper, we argue . . . that the scale constraints utilized in this manner under the distance-metric optimization framework are, in some cases, completely redundant. We provide necessary mathematical proofs and illustrate our arguments through an abstract physical system, examples, a case study, and a brief computational experiment Daha fazlası Daha az

Ozan Çakır | İBRAHİM GÜRLER | BORA GÜNDÜZYELİ

Makale | 2022 | International Journal of Contemporary Economics and Administrative Sciences

In this manuscript, with grounding in Liu–Lin axioms of greyness degree and information content, we provide new results that relate to these concepts in consideration of a number of mathematical operations over a sequence of grey numbers. In particular, we derive greyness degree results of summation, conic combination, and convex combination of a sequence, as well as inverse of a number and normalization of a number over a sequence. Then, we turn our attention to prove information content results for the union and intersection of a sequence. We illustrate our results by using a simple Monte Carlo simulation in the multi-attribute de . . .cision-making context, and by using an interesting dice-rolling experiment. Through our analysis, we also provide some new definitions, such as for conic combination, convex combination, normalization, and union and intersection operations. The novelty of the derived results in this study is that they can help researchers and practitioners of grey systems in tracking probable intensifications and reductions in the greyness degree in successive application steps of their working methods. Moreover, researchers are provided with two results to calculate information content for the union and intersection of grey numbers in an uncomplicated manner Daha fazlası Daha az

MEZİYET UYANIK | İBRAHİM GÜRLER

Makale | 2022 | International Journal of Contemporary Economics and Administrative Sciences

This study examines the effects of users' perceived usefulness and ease of use of mobile sites in their mobile purchasing processes on customer satisfaction and purchase intentions, according to users' perceived trustworthiness towards the vendor with the Technology Acceptance Model perspective.As a result of the analysis made with the data obtained through the survey from 460 active mobile shopping participants over 18, it was concluded that the perceived usefulness and perceived ease of use affect the participants' satisfaction with the mobile site. This satisfaction has a positive effect on the purchase intentions of the customer . . .s.In addition, it was concluded that the perceived trustworthiness of the vendor has a moderating effect on the effect of the satisfaction of the participants from the use of the mobile site on their purchase intention.The positive relationship between participants' satisfaction with mobile site usage and purchase intentions is stronger under conditions of higher perceived trustworthiness towards the vendor Daha fazlası Daha az

İBRAHİM GÜRLER | BORA GÜNDÜZYELİ | Ozan Çakır

Makale | 2022 | mathematics

In the current account, we present an analysis of a non-discriminating criterion under simple additive weighting synthesis, considering a deep decision hierarchy. A non-discriminating criterion describes a criterion where all decision alternatives under consideration perform equally. We question eliminating such a criterion from the decision hierarchy in search of simpler problem representation and computational efficiency. Yet, we prove such an approach may result in order misrepresentations between decision alternatives. This analysis is performed in the form of four research questions that relate to the detection of certain condi . . .tions under which such distortions in the order integrity of decision alternatives will occur, calculating the change in their final performances, distinguishing the alternatives whose performances are consistent, and examining the role of the normalization procedure adopted in averting such distortions when the non-discriminating criterion is ignored. Along these lines, this study provides clear inferences which are of interest to researchers and decision makers, using simple additive weighting and similar methods that rely on additive synthesis Daha fazlası Daha az