Hajem A. Daham

Hajem A. Daham
Al-Muthanna University

Ph.D. in Operational Research

About

9
Publications
10,344
Reads
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80
Citations
Citations since 2016
9 Research Items
80 Citations
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201620172018201920202021202201020304050
201620172018201920202021202201020304050

Publications

Publications (9)
Article
Full-text available
Given a (0, 1) −matrix, the Consecutive Ones Submatrix (C1S) problem which aims to find the permutation of columns that maximizes the number of columns having together only one block of consecutive ones in each row is considered here. A heuristic approach will be suggested to solve the problem. Also, the Consecutive Blocks Minimization (CBM) proble...
Article
Full-text available
Healthcare systems efficiency is a ratio of service delivery system outputs to inputs to achieve optimal strategy for decision makers. In this paper, we investigated the efficiency of Eastern Mediterranean health observatory systems. For this purpose, a data envelopment analysis model formulated to evaluate the efficiency of healthcare systems resp...
Article
Discrete facility location problems are classified as types of facility location problems, wherein decisions on choosing facilities in specific locations are made to serve the demand points of customers, thus minimizing the total cost. The covering- and median-based problems are the common classified types of discrete facility location problems, wh...
Chapter
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Outliers in multivariate data is an intractable problem. In statistics, the Minimum Volume Ellipsoid (MVE) estimator is an essential tool in outlier detection and robust regression. Given a set of points \(C=\{x_{1}, x_{2},..., x_{m}\} \subseteq \,\, R^{n}\). If it required only that at least k of m points, \(k < m\) be enclosed in the minimum volu...
Article
Full-text available
In reality, the flipped classroom has gained popularity as a modern way of structuring teaching, where lectures move from in-class procedures to digitally-based assignments, freeing up the debate, and practice exercises class time. Therefore, it is essential to implement and analyze a way of teaching that will improve student performance. The paper...
Article
Full-text available
Inland transportation of containers contributes significantly to the total cost of container intermodal transportation. For this reason, it has received a lot of attention in the last few decades. While there are many reports of attempts to solve the problem out there, the variants considered are all simpler than the form addressed in this paper. H...
Article
Full-text available
A significant portion of the total cost of the intermodal transportation is generated from the inland transportation of containers. In this paper, we design a mixed integer linear programming (MILP) model for combining orders in the inland, haulage transportation of containers. The pickup and delivery process of both 20 and 40 foot containers from...
Article
Full-text available
The inland transportation takes a significant portion of the total cost that arises from intermodal transportation. In addition, there are many parties (shipping lines, haulage companies, customers) who share this operation as well as many restrictions that increase the complexity of this problem and make it NP-hard. Therefore, it is important to c...

Questions

Question (1)
Question
What is the difference between logistics and transportation ?

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