It is well known that TCP experiences performance problems (unfairness and starvation) in multi-hop wireless networks. Such problems are often traced to the misbehavior of dynamic routing protocols in case of link failure. However, in this paper we show, through simulations, that unfairness and starvation of flows also take place with static routing; thus competition between TCP flows in a mult...

We report on a four-year investigation of how information flows affect white-collar productivity. For this research, we developed software to track all e-mail activity within a midsize executive recruiting firm. We also negotiated access to three separate data sets including: (1) project level accounting measures of revenues, (2) surveys of individual perceptions of information technology and i...

The problem of fair distribution of available bandwidth among traffic flows or aggregates remains an essential issue in computer networks. This paper introduces a novel approach, called the Exact Bandwidth Distribution Scheme (X-BDS), for dynamic and fair distribution of available bandwidth among individual flows. In this approach, the edge routers keep per-flow information, while the core rout...

Optimizing traffic signal control in real-time to respond to changing vehicle flows is a challenging problem. As the size of the road network increases, the exponential growth in joint signal timing and traffic states presents a difficult computational barrier to determining effective traffic light signalization. Furthermore, the dynamic nature of traffic flows makes reliable prediction possibl...

Today’s competitive business environment has resulted in increasing cooperation among individual companies as members of a supply chain. Accordingly, third party logistics providers (3PLs) must operate supply chains for a number of different clients who want to improve their logistics operations for both forward and reverse flows. As a result of the dynamic environment in which these supply cha...

We propose a dynamic QoS, or D-QoS, model where QoS settings can be automatically reconfigured based upon requests from authorized users. Different levels of privilege can be assigned to users enabling higher privileged users to interrupt the network flows belonging to those of lower privileged levels. To request for a special QoS treatment, a user can issue an active packet to interrupt any ac...

Introduction Increasing numbers of mobile computing devices form dynamic networks in daily life. In such environments, nodes (i.e. laptops, PDAs, smart phones) are sparsely distributed, forming a network which is often partitioned due to geographical separation or node movement. We envision a new communication paradigm using dynamic interconnectedness between people leading towards a world wher...

In this paper we study two basic problems related to dynamic flows: maximum multicommodity flow and the minimum cost multicommodity flow problems. We consider these problems on dynamic networks with time-varying capacities of edges. For minimum cost multicommodity flow problem we assume that cost functions, defined on edges, are nonlinear and depending on time and flow, and the demand function ...

Flood routing has many applications in engineering projects and helps designers in understanding the flood flow characteristics in river flows. Floods are taken unsteady flows that vary by time and location. Equations governing unsteady flows in waterways are continuity and momentum equations which in case of one-dimensional flow the Saint-Venant hypothesis is considered. Dynamic wave model as ...