In this paper, we tackle the problem of opportunistic spectrum access in large-scale cognitive radio networks,where the unlicensed Secondary Users (SU) access the frequency channels partially occupied by the licensedPrimary Users (PU). Each channel is characterized by an availability probability unknown to the SUs. We applyevolutionary game theory to model the spectrum access proble...

In this paper, we present a new block replacement policy in which we proposed a new efficient algorithm for combining two important policies Least Recently Used (LRU) and Least Frequently Used (LFU). The implementation of the proposed policy is simple. It requires limited calculations to determine the victim block. We proposed our models to implement LRU and LFU policies. The new policy gives e...

Administrative role-based access control (ARBAC) is the first comprehensive administrative model proposed for role-based access control (RBAC). ARBAC has several features for designing highly expressive policies, but current work has not highlighted the utility of these expressive policies. In this report, we present a case study of designing an ARBAC policy for a bank comprising 18 branches. U...

We establish that the Fluctuation Smoothing Policies for Mean Cycle Time (FSMCT) are stable for stochastic re{entrant lines. These constitute the rst analytical results for stochastic systems on this class of scheduling policies, which were proposed in 1] and 2], and shown to substantially reduce the mean and variance of cycle times semiconductor plant models. A special case is the Last Buuer F...

The aim of this paper is to discuss the modelling and optimization of condition-based maintenance policies for systems is submitted to usage profile changes. The considered system undergoes a monotone deterioration (gamma process) and its is impacted by the usage conditions (covariates) via the proportional hazards model. Four different policies are proposed and the optimal maintenance paramete...

Advances in sarcoma treatment are largely based on investigator-initiated, multicentric and interdisciplinary clinical trials. The EU’s Good Clinical Practice Directive 2001/20/EC, effective since 2004, was meant to harmonize the conditions for clinical trials across Europe, but, instead, the challenge of initiating and running multinational, noncommercial clinical trials has become greater tha...

Article 4 of Council Directive 81/851/EEC requires that a Member State shall not authorise the placing on the market of a veterinary medicinal product intended for administration to food producing animals [...] unless the active substance [...] contained in the product: a) were authorised for use in other veterinary medicinal products in the Member State concerned on the day of entry into force...

Subsidies have become increasingly important tools of industrial policy due to the gradual liberalization of trade and finance since the 1960s. Still, there is considerable variation in subsidy levels in industrialized countries. In this paper, I seek to explain the variation in the levels of industrial subsidies among OECD countries in the period 1989-1995. I test the impact of both domestic p...

In 2014, at latest in 2015, extensive changes in the legal environment for patents in Europe are to be expected, having considerable impact on monopolizing inventions e.g. from the nanotechnology environment: With establishing the "European patent with unitary effect”, for the very first time the grant of single patents with uniform coverage of (almost) the entire territory of the European Unio...

European Institutions, especially the European Parliament, are venues of access for digital activist networks wishing to influence policymaking on issues of intellectual property rights, internet regulation and the respect of civil rights in digital environments. We refer to these networks as “digital activism”. They are more or less loosely rooted in hacker culture and are intensively making u...