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This paper is devoted to the precise and fast performance assessment of high-order modulation quadrature amplitude schemes used for a terrestrial microwave radio which uses optimum diversity combining and decision-feedback equalization at the receiver. The equalizer using a few taps can not yield perfect equalization and would result in significant residual ISI. For such a case, the bit error rate...
Many e-health portal systems are implemented using off-the-shelf software components. The security features provided by such components are usually insufficient. This paper addresses the issue from the access control perspective. More specifically, we first propose a two-tier approach to access control for e-health portals. The approach supplements existing role based access control (RBAC) capabilities...
In applications such as e-Health systems, a user's consent should usually be obtained before his/her private information can be disclosed. For this purpose, users need to specify their privacy preferences about what data are to be disclosed to which recipients for what purposes. However, this may become a daunting task in a complicated application that involves potentially a large number of combinations...
Content addressable memory (CAM) is widely used in many applications that require fast table lookup. Due to the parallel comparison feature and high frequency of lookup, however, the power consumption of CAM is usually significant. In this paper we propose a decoupled match line scheme which combines the performance advantage of the traditional NOR-type CAM and the power efficiency of the traditional...
The paper studies "equality" in XML model decomposition. XML IFD, TFD, AFD and MVD are proposed. According to complexity of these FDs, four XML normal forms are presented. FD maintenance and lossless join decomposition of DTD are defined to analyze "equality" of decomposition. Four lossless algorithms are proposed to decompose DTD into some XML normal form and validity of these...
Virtual private network (VPN) services are getting important due to the expansion of enterprises and the requirement for securely transferring confidential data. The populations using VPN services include service provider administrators, local enterprise device managers, and end users. Service provider administrators provide interconnectivity among separated local devices, while local enterprise device...
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