In this paper, we analyze the performance of one-hop network coding in multi-hop networks and optimize it by two solutions. One is evaluating cost-delay tradeoff of opportunistic network coding in a two-way relay network with asymmetric arrival rates, we first formulate the variance of the queue into a Markov chain and derive the transition probability and the stable distribution. Then we analy...

The design of a supply chain network (SCN) should address two conflicting objectives, i.e. inexpensive yet reliable operation. This paper presents models to choose facilities and determine distribution options while considering the expected risk not serving customers attributed shortages. goal is with lower cost under traditional objectives. We formulate stochastic mixed-integer biobjective pro...

A tradeoff is a situation that involves losing one quality or aspect of something in return for gaining another quality or aspect. Speaking about the tradeoff between performance and security indicates that both, performance and security, can be measured, and that to increase one, we have to pay in terms of the other. While established metrics for performance of systems exist this is not quite ...

Despite the benefits of resistance, susceptibility to infectious disease is commonplace. Although specific susceptibility may be considered an inevitable consequence of the co-evolutionary arms race between parasite and host, a more general constraint may arise from the cost of an immune response. This "cost" hypothesis predicts a tradeoff between immune defense and other components of fitness....

This paper describes a new framework for a planning of vision and motion for a mobile robot. For a planning in a real world, the uncertainty and the cost of visual recognition are important issues. A robot has to consider a tradeoff between the cost of visual recognition and the effect of information obtained by recognition. A problem is to generate a sequence of vision and motion operations ba...

The purpose of this paper is to present the possibility of replacing physical unit cost in transportation or distribution problems by an aggregate coefficient, getting qualitative and subjective considerations involved. The model for constructing aggregate cost is a two stage multiple attribute decision-making problems. In the first stage supply points, demand points and routes of transportatio...

In this paper, we consider heterogeneous distributed storage systems (DSSs) having flexible reconstruction degree, where each node in the system has dynamic repair bandwidth and dynamic storage capacity. In particular, a data collector can reconstruct the file at time t using some arbitrary nodes in the system and for an arbitrary node failure the system can be repaired by some set of arbitrary...

Condition-based protocols are implementations of relaxed agreement problems in which termination is guaranteed in predefined scenarios. In a previous work, a tradeoff between communication cost and convergence ratio is identified in the shared memory model. This paper investigates the extremal problem of solving consensus with only a single write operation. We show that this problem has a condi...