Supply contracts are a medium for coordinating materials and information flows in supply chains aiming at reducing uncertainties, order variances, delivery lead times, and inventory risks with increased fill rates. Practitioners were always up-front involved in designing and negotiating clauses of so called quantity flexibility contracts. Meanwhile researchers have proved the advantage of such ...

We propose a class of nonparametric tests on the Pareto tail index of the innovation distribution in the linear autoregressive model. The simulation study illustrates a good performance of the tests. Such tests have various applications in a study of flood flows, rainflow data, behavior of solids, atmospheric ozone layer and reliability analysis, in communication engineering, in stock markets a...

After the exponential growth phase, variability in the scattering efficiency of phytoplankton cells over their complete life cycle is not well characterised. Bulk measurements are impacted by senescent cells and detritrus. Thus the analysis of the evolution of the optical properties thanks to their morphological and/or intra-cellular variations remains poorly studied. Using the Cytosense flow c...

In this paper we analyse the effects of different spatial input data resolution on water balance simulation using a simple distributed hydrological model: PCRXAJ model. A data set consisting of land use and digital elevation model at 25 m resolution of Xitiaoxi catchment in South China is used for investigation. The model was first calibrated and validated at 50m cell size, thereafter an aggreg...

In this work, the design of supply chains with reverse flows is studied in a multiobjective context. A MILP model is developed for the optimization of the supply chain structures where both environmental impacts and costs are considered. An optimal Pareto front is obtained that plays an important role in evaluating the best locations of all the entities in the supply chain while accounting for ...

We use laboratory experiments to test three different water market institutions designed to incorporate instream flow values into the allocation. The institutions are (1) a baseline with fixed minimum flow constraints, (2) an environmental agent contributing to the cost of providing instream flows, and (3) creating an instream flow right in which an environmental agent can sell the right to red...

In this paper, we consider a network of rate proportional processor sharing servers in which sessions with long-tailed duration arrive as Poisson processes. In particular, we assume that a session of type n transmits at a rate rn bits per unit time and lasts for a random time τn with a generalized Pareto distribution given by IP{τn > x} ∼ αnxn for large x, where αn, βn > 0. The weights are take...

Businesses are aching under the burdens entailed by public reporting duties while public administrations are faced with rising cost pressures. Fostered by the diffusion and maturation of information technology, businesses put forth growing demands in regard to the quality, integration and usability of public services. An effective means of meeting these challenges is through the identification ...

A heat-driven thermoacoustic refrigerator has been designed and tested. A detailed thermal model of the device is presented. Energy balances within the system are discussed using external, heat exchanger, and stack control volumes in order to clarify the relationships of work and heat fluxes below and above onset. Thermal modeling is discussed as a tool for performance analysis as well as for d...