This paper addresses a variation of the role-based access control (RBAC) model with a classification mechanism for objects and a notion of class hierarchies. In the proposed model, the authorization tasks are performed based on the classes instead of the individual objects. This results in more flexibility in terms of security administrative tasks such as downgrading or upgrading individual obj...

The present research develops a model to treat the organization, growth, and contraction of network elements. The components of the model include travel demand, revenue, cost, and investment. Revenue earned by links in excess of maintenance costs is invested on the link until all revenue is consumed. After upgrading (or downgrading) each link in the network, the time period is incremented and t...

This paper deals with downgrading the 1-median, i.e., changing values of parameters within certain bounds such that the optimal objective value of the location problem with respect to the new values is maximized. We suggest a game-theoretic view at this problem which leads to a characterization of an optimal solution. This approach is demonstrated by means of the Downgrading 1-median problem in...

Consumers of resources in realistic applications (e.g., web, multimedia) typically derive diminishing-return utilities from the amount of resource they receive. A resource provider who is deriving an equal amount of revenue from each satisfied user (e.g., by online advertising), can maximize the number of users by identifying a satisfaction threshold for each user, i.e., the minimal amount of r...

It is axiomatic that the potential of FDI to act as a catalyst for economic development varies by its motivation, and the competence level and scope of foreign-owned affiliates. This chapter seeks to examine the effect of regional integration (RI) on MNE strategies while acknowledging other globalisation-related developments. We examine MNE strategies in developing countries in four scenarios; ...

a r t i c l e i n f o JEL classification: F13 F42 F51 Keywords: Trade war out of fear Risk-dominant equilibrium Global game in trade policies Strategic complementarity Trade retaliation strategies This paper examines why the recent efforts to arrange free trade regimes have failed repeatedly focusing on the increased uncertainties in economic fundamentals and the asymmetric political economic c...

Japan has experienced a deep and prolonged banking crisis in the 1990s. In this paper we attempt to identify the characteristics of companies which have the most to lose from the banks’ malaise. Using stock price data, we calculate abnormal returns of non-financial companies around significant dates in the history of the banking crisis, starting in 1995. The events we study include various gove...

Using data on all corporate bond loans by one of the world’s largest custodian banks, we study the main determinants of shorting costs as measured by rebate rate specialness. We find that 3.0% of corporate bonds are on loan, and 11% of loaned bonds have substantial shorting costs above 50 basis points. In the cross section, specialness is higher for bonds that are of worse credit rating, higher...

This work presents an analysis of the buffer features of an access router, especially the size, the impact on delay and the packet loss rate. In particular, we study how these features can affect the Quality of Service (QoS) of multimedia applications when generating traffic bursts in local networks. First, we show how in a typical SME (Small and Medium Enterprise) network in which several mult...

Introduction Jet pumps are static components that can be used in closed-loop, traveling wave thermoacoustic devices to suppress a time-averaged mass flux (Gedeon streaming) that can exist [2]. The minimization of convective heat transport caused by this mass flux is of vital importance due to the detrimental effect it has on the device’s efficiency. Jet pumps have an asymmetric shape, resulting...