In this paper, a reliability approach on reconfiguration decisions in a supply chain network is studied based on coupling the simulation concepts and artificial neural network. In other words, due to the limited budget for warehouse relocation in a supply chain, the failure probability is assessed for determining the robust decision for future supply chain configuration. Traditional solving ...

Some servers are to be located at nodes of a network. Demand for services of these servers is located at each node and a subset of the nodes is to be chosen to locate one server in each. Each customer selects a server with a probability dependent on distance and a certain amount of benefit is achieved after giving service to the customer. Customers may waive receiving service with a known prob...

In nature, fluids often show stochastic and disordered behaviors both in time and space. These phenomena are inclusively called the “turbulent flows”. In various circumstances in the real world such that the Reynolds number exceeds some thousands or millions, fluid turbulence plays important roles; it promotes the mixing of the fuel and air in engines, it enhances the drag force on the surfaces...

Early statistical methods focused on pre-data probability statements (i.e., data as random variables) such as P values; these are not really inferences nor are P values evidential. Statistical science clung to these principles throughout much of the 20th century as a wide variety of methods were developed for special cases. Looking back, it is clear that the underlying paradigm (i.e., testing a...

We study the structure of an optimal management for innovative activities. The top management of a buyer hires a supplier for production. The production e¢ ciency can be enhanced by investing in R&D before production. The buyer chooses between using its own subunit for the R&D, or outsourcing the task to the supplier (integration of R&D and production). Our analysis reveals that (i) when the R&...

to begin with and be bloody-minded about continuing this specific interest. You should always enjoy biology, even when some aspects of doing research are tedious or even unsuccessful. If you don’t enjoy what you are doing, then you might as well be in business and be paid well to do boring things! Beyond that it is a matter of personal style; my advice depends upon where you are on the personal...

The n-dimensional binary hypercube is the graph whose vertices are the binary n-tuples {0,1}n and where two vertices are connected by an edge if they differ at exactly one coordinate. We prove that if the edges are assigned independent mean 1 exponential costs, the minimum length Tn of a path from (0,0, . . . ,0) to (1,1, . . . ,1) converges in probability to ln(1 +√2)≈ 0.881. It has previously...