This paper discusses a production-inventory system under random machine breakdown. Holding safety stock is the common way to mitigate effect of breakdown on shortages that may occur during repair time. Since holding can be costly, especially for expensive products, this investigates an alternative strategy in which it assumed production manager purchase same products from supplier order meet de...

T construction of a probabilistic model is a key step in most decision and risk analyses. Typically this is done by defining a single joint distribution in terms of marginal and conditional distributions. The difficulty of this approach is that often the joint distribution is underspecified. For example, we may lack knowledge of the marginal distributions or the underlying dependence structure....

Within the EU FP6 Integrated Project WINNER, adaptive transmission is investigated as a key technology for boosting the spectral efficiency of a new radio interface for 4G systems. Adaptive allocation of timefrequency bins in an OFDM-based system offers a significant potential, but also poses challenges. Within work package 2 of WINNER, we study critical issues such as the feasibility of adapti...

This paper describes work done in response to a commission from the Ministry of Defence DEC ISTAR office, on behalf of the MoD Directorate of Targeting and Information Operations. The overall requirement was to provide guidance to Information Operations staff both in the UK and in theatre. The objectives of the particular work package discussed in this paper were: to assess the suitability of a...

The work breakdown structure (WBS) is a vehicle for breaking an engineering project down into subproject, tasks, subtasks, work packages, and so on. It is an important planning tool which links objectives with resources and activities in a logical framework. It becomes an important status monitor during the actual implementation as the completions of subtasks are measured against the project pl...

We show that it is possible to obtain spontaneous CP violation in the minimal SU(2)L × SU(2)R ×U(1)B−L, i.e. in a left right symmetric model containing a bidoublet and two triplets in the scalar sector. For this to be a natural scenario, the non-diagonal quartic couplings between the two scalar triplets and the bidoublet play a fundamental role. We analyze the corresponding Higgs spectrum, the ...