The popularity of service-oriented architectures (SOA) lives on the promise of dynamic IT-supported interbusiness collaborations. Yet the programming models in use today are a poor match for the distributed, looselycoupled, document-based SOA; and the gap widens: interoperability across organizations needs contracts to reduce risks. Thus, high-level contract models are making their way into SOA...

Video Surveillance as a Service provides service to users using Cloud technology. The DRAGON-Lab supports an opportunity for researchers to use Cloud technology on an open platform, but the services utilize schemes have not been defined. This paper proposed two VSaaS working models, market model and tender/contract model. A comparision testing are given and proven the proposed models are applic...

We illustrate how equilibrium screening models can be used to evaluate the economic consequences of insurance market regulation. We calibrate and solve a model of the United Kingdom's compulsory annuity market and examine the impact of gender-based pricing restrictions. We find that the endogenous adjustment of annuity contract menus in response to such restrictions can undo up to half of the r...

The article discusses problems of model based test construction and ways of their solution using different kinds of models (operational, contract, axiomatic, and historybased specifications). The main idea is that the integration of model based techniques having different underlying formalisms can give valuable practical results in test construction. The idea is illustrated by successful applic...

considered supply chain in this article consists of one vendor and multiple retailers where the vendor applies vendor managed inventory. considering vendor as a leader and retailers as followers, stackelberg game theory is applied for modeling and analyzing this system. a general mixed integer nonlinear model is developed which can optimizes the performance of the system under revenue sharing c...

Contract farming has gained in importance many developing countries. Previous studies analysed effects of contracts on smallholder farmers’ welfare, yet mostly without considering that different types contractual relationships exist. Here, we examine associations between contract and farm household income the oil palm sector Ghana, explicitly differentiating two contracts, namely simple marketi...