On one hand we present below some examples of uid networks control which illustrate the general method for optimally emptying networks with linear holding costs proposed in Avram, Bertsimas and Ricard(95). On the other hand we attempt to study the changes in the optimal policies for uid models caused by stochasticity e ects. In the case of the usual expected total emptying cost objective, we fo...

In the food production, operating environment, personnel, equipment and many other factors may introduce microbiological hazards into food, which makes consumers face health and safety risk. Effective implementation of risk management is essential to ensure food safety. In order to search, assess, prevent and control of varieties of risk factors, modular process risk modeling method is improved...

Risk-aware access control systems grant or deny access to resources based on the notion of risk. It has many advantages compared to classical approaches, allowing for more flexibility, and ultimately supporting for a better exploitation of data. We propose and demonstrate a risk-aware access control framework for information disclosure, which supports run-time risk assessment. In our framework ...

Recently the optimal reinsurance strategy concerning the insurer’s risk attitude and the reinsurance premium principle is an interesting topic. This paper discusses the optimal reinsurance problem with the insurer’s risk measured by distortion risk measure and the reinsurance premium calculated by a general principle including expected premium principle and Wang’s premium principle as its speci...

Background: Acne vulgaris has a multifactorial pathogenesis; however, the exact role of genetic predisposition is not clear. Some studies have reported an association between familiy historyof acne and moderate to severe acne. In this study, we investigated the relationship between familiy history and prevalence of acne vulgaris in girls 8 to 13 years of age.Methods: This case-control study enr...

Original scientific paper New generation electricity network called Smart Grid is a recently conceived vision for a cleaner, more efficient and cheaper electricity system. One of the major challenges of electricity network is that generation and consumption should be balanced at every moment. This paper introduces a new concept for controlling the demand side by the means of automatically enabl...

This document reports on progress made towards DITTO Project Deliverable 3.1, on the development and testing of a rail network simulation model and the use of the resulting model to examine the traffic management and optimal control strategies for ERTMS Level 3. Whilst the advanced technologies employed by ERTMS Level 3, moving away from trackbased detection and line-side signalling of the curr...

We present a new model for optimal dynamic pricing of perishable services or products that incorporates a simple risk measure permitting control of the probability that total revenues fall below a minimum acceptable level. The formulation assumes that sales must occur within a finite time period, that there is a finite—possibly large—set of available prices, and that demand follows a price-depe...

A data warehouse stores secret data about the privacy of individuals and important business activities. This makes access to this source a risk of disclosure of sensitive data. Hence the importance of implementing security measures which guarantee the data confidentiality by establishing an access control policy. In this direction, several propositions were made, but none are considered as a st...