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American Journal of Operations Research (AJOR) is an international scientific journal dedicated to the publication and public discussion of high quality, original papers that contribute to the methodology of operational research and to the practice of decision making. AJOR contains the following types of papers: (1)In…
Vincent C. Asogwa, Adoo D. Wombo, Charles U. Ugwuoke
The study investigated challenges encountered and coping strategies adopted by postgraduate students of agricultural education in writing thesis in Nigerian universities. Two research questions and two hypotheses guided the study. The study was conducted in N…
Nguyen Khac Minh, Nguyen Khac Minh, Pham Van Khanh
This study develops the approach by Minh & Khanh [1] to the classic Barro and Sala-i-Martin method [2], [3] named “expanded Barro regression method”, and applies this approach in analyzing the convergence of provincial per capita GDP in Vietnam over the perio…
Orkia Derkaoui, Ahmed Lehireche
Efficient solvers for optimization problems are based on linear and semidefinite relaxations that use floating point arithmetic. However, due to the rounding errors, relaxation thus may overestimate, or worst, underestimate the very global optima. The purpose…
Shilpi Gupta, Upena Dalal, Vishnu Narayan Mishra
The system performance has been analyzed for π/4 DQPSK mapping scheme, which is differential in nature and hence adding additional advantage. Performance evaluation with random data as well as some images has been taken. Channel modeling has been performed in…
William P. Fox, Sean F. Everton
A Dark Network is a network that cannot be accessed through tradition means. Once uncovered, to any degree, dark network analysis can be accomplished using the SNA software. The output of SNA software includes many measures and metrics. For each of these meas…
Can Öztürker, İbrahim Şahbaz, Zeynep Karaarası Öztürker, Mehmet Tolga Taner, Şükrü Bayraktar, Gamze Kağan
The aim of this article is to show how an eye clinic of a Turkish public hospital initiated Six Sigma principles to reduce the number of complications encountered during and after trabeculectomy surgeries. Data were collected for ten years. To analyse the pro…
Jamal Ouenniche, Bing Xu, Kaoru Tone
With the increasing number of quantitative models available to forecast the volatility of crude oil prices, the assessment of the relative performance of competing models becomes a critical task. Our survey of the literature revealed that most studies tend to…
Irinel Dragan
In the theory of cooperative transferable utilities games, (TU games), the Efficient Values, that is those which show how the win of the grand coalition is shared by the players, may not be a good solution to give a fair outcome to each player. In an earlier…
Wei Song, Renwen Wang, Yelin Fu, Xiaobao Peng
The expanding role of the Internet in consumer purchasing activities has created substantial new opportunities accessing to end-consumers. More and more manufacturers are beginning to sell products to potential consumers directly online while continuing to se…
Virgílio José Martins Ferreira Filho, Antônio Orestes de Salvo Castro
Hydraulic fracturing is widely used to increase oil well production and to reduce formation damage. Reservoir studies and engineering analyses are carried out to select the wells for this kind of operation. As the reservoir parameters have some diffuse charac…
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American Journal of Operations Research (AJOR) is an international scientific journal dedicated to the publication and public discussion of high quality, original papers that contribute to the methodology of operational research and to the practice of decision making. AJOR contains the following types of papers: (1)In… All articles are open access under a CC BY 4.0 licence, with authors retaining copyright.
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