due to business and environmental issues, the efficient design of an integrated forward/reverse logistics network has recently attracted more attention from researchers. the significance of transportation cost and customer satisfaction spurs an interest in developing a flexible network design model with different delivery paths. this paper proposes a flexible mixed-integer programming model to ...

In this document, a brief overview of my doctoral research is presented. In model-driven engineering (MDE), most problems are solved using model transformation. An efficient process to solving these problems is to apply reusable patterns while solving them. Finding reusable design patterns to specific subsets of problems helps to decrease the time and cost needed to solve them. My doctoral rese...

With the rise of digital publishing and open access it has become increasingly important for publishers to store information about ownership and licensing of published works in a robust way. In a fast moving environment Elsevier, a leading science publisher, recognizes the importance of sound models underlying its data. In this paper, we describe a data model for copyright and licensing used by...

In this work, a new drilling and blasting design methodology is introduced and applied at a case study mine to improve productivity. For the case study copper mine, a blast diameter of 203 mm is proposed to be used in the ore zone to meet the new required production rate of 90mtpa from 75mtpa. Currently, the Konya and Walter’s model is used to generate drilling and blasting design at a bl...

Taking a process research approach, we have followed a government agency in the railroad industry over a six-year-period as they have engaged in an IT-based innovation project. Providing empirical insights into this process and using path creation theory to analyse our case, we further our understanding of how IT-based innovations evolve over time by highlighting its multi-dimensional nature. W...

Abstract The concept of spin model is due to V. F. R. Jones. The concept of nonsymmetric spin model, which generalizes that of the original (symmetric) spin model, is defined naturally. In this paper, we first determine the diagonal matrices T satisfying the modular invariance or the quasi modular invariance property, i.e., (PT) = s/rnP or (PT) = m%I (respectively), for the character table P of...

Camera models are essential infrastructure in computer graphics, visualization, and vision. The most frequently used model is the planar pinhole camera, because it approximates the human eye well, producing familiar images, and because it is simple, enabling efficient software and hardware implementations. However, the requirement that all rays pass through a common point is restrictive and rel...

The paper presents a Construction Database Model (CDM) used for the conceptual level modelling of design objects. A primary intention of the CDM model is modelling hierarchically structured objects and construction dependencies among objects. CDM is an attribute based data model. The CDM model represents various abstractions identiied in the semantic database models GSM, IFO, SAM* and FDM by me...

The U.S. Army Corps of Engineers has developed a tool called the Modular Design System (MDS) to assist design professionals in the processes of planning, design, and construction document preparation for repetitive facility types. The use of early versions of MDS has demonstrated a reduction in time by nearly two-thirds typically required to design and award a construction contract. Initially d...