In this paper, we provide an overview of important transmission protocols for a certain class of challenged heterogeneous networks commonly termed delayor disruptiontolerant networks (DTN). We outline basic requirements and limitations for these protocols, including the Bundle Protocol and the LTP and Saratoga convergence layer protocols, sketch their respective solution approaches and provide ...

In the present paper we develop a stochastic (Markov chain) model for a mathematical description of the decision making (DM) process and we apply principles of fuzzy logic (FL) in representing the DM process in a fuzzy environment. Further, we develop an innovative approach for studying the step of verification of a chosen decision, which is based on principles of FL (a special form of the COG ...

Construction project delays emanates from multiplicity of different sources of risk events. This, combined with high uncertainty in cause-effect relationships between the events and their impacts on project completion dates, have created immense difficulties in apportioning project delay responsibilities amongst contracting parties. This challenge is now dealt with by various delay analysis app...

This paper describes a study of a large design and manufacture engineering project, undertaken as part of a Delay and Disruption litigation. Design changes and delays in design approval would have caused delay to the project; in order to fulfil a tight time-constraint, management had to increase parallel development in the network logic, reducing delay but setting up feed-back loops that marked...

The purpose of this research was to study the recognition, application and quantification of the risks associated in managing projects. In this research, the management of risks in an oil and gas project is studied and implemented within a case company in Oman. In this study, at first, the qualitative data related to risks in the project were identified through field visits and extensive interv...

Utilization is one of the main managerial factors that is applied for construction process analysis well. It directly affects the project duration and construction costs. Therefore, a utilization study in tunneling projects is essential. In this work, the utilization of an earth pressure balance Tunnel Boring Machine (TBM) in Tabriz urban railway project was studied using the Monte Carlo simula...

Sociotechnical systems theory (STS), a theory that originated in studies of mechanization in British coal mines, holds that work processes consist of two separate dimensions, one social, the other technical. The main tenant of STS is the principle of joint optimization – that is, the dimensions are reciprocally interdependent and must be designed conjointly. Although it has been intuitively app...