In this paper, we address the problem of determining an optimal topology for Bluetooth Wireless Personal Area Networks (BT-WPANs). In BT-WPANs, multiple communication channels are available, thanks to the use of a frequency hopping technique. The way network nodes are grouped to share the same channel, and which nodes are selected to bridge traffic from a channel to another, has a significant i...

Real options literature commonly assumes that, either the investment opportunity is directly managed by the owners, or the managers are perfectly aligned with them. However, agency conflicts occur and managers reveal interests not totally in line with those of the shareholders. This may have a major impact on the value maximizing decisions, namely, on the optimal timing to invest. This paper co...

It has recently been shown that distributed queuebased adaptation of CSMA’s contention aggressiveness can provably optimize network utility. However, such an approach is fragile, and was shown to suffer high performance degradation under conditions of frequent occurrence, namely; asymmetric channels, heterogeneous traffic, and packet collisions. In this work, we address the main sources of perf...

When experiments are performed on social networks, it is difficult to justify the usual assumption of treatment-unit additivity, due to the connections between actors in the network. We investigate how connections between experimental units affect the design of experiments on those experimental units. Specifically, where we have unstructured treatments, whose effects propagate according to a li...

Joint design of routing and Resource allocation algorithms in cognitive radio based wireless mesh networks. The mesh nodes utilize cognitive overlay mode to share the spectrum with primary users. Prior to each transmission, mesh nodes sense the wireless medium to identify available spectrum resources. Depending on the primary user activities and traffic characteristics, the available spectrum r...

The operations number was evaluated for different design strategies to select the optimal or quasioptimal strategy that has the minimal computer time. The general methodology for the system design was elaborated by means of the optimal control theory approach. The problem of the time-optimal system design has been formulated as the classical problem of the optimal control for the some functiona...

Joint design of routing and Resource allocation algorithms in cognitive radio based wireless mesh networks. The mesh nodes utilize cognitive overlay mode to share the spectrum with primary users. Prior to each transmission, mesh nodes sense the wireless medium to identify available spectrum resources. Depending on the primary user activities and traffic characteristics, the available spectrum r...

This paper formulates a continuous model of a grid road network for determining the optimal hierarchical system of road networks. The hierarchical system is represented as the proportions of area taken up by roads at each level of the hierarchy. The objective is to derive the optimal ratio of road areas that minimizes the total travel time. The model explicitly takes into account inward, outwar...

Setting traffic light signals is a classical topic in engineering, and important heavy-traffic conditions when green times become scarce longer queues are inevitably formed. For the fixed-cycle traffic-light queue, an elementary queueing model for one with cyclic signaling, we obtain limits that capture long-term queue behavior. We leverage limit theorems to sharp performance approximations hea...