We present a sound and automated approach to synthesize safe digital feedback controllers for physical plants represented as linear, time invariant models. Models are given as dynamical equations with inputs, evolving over a continuous state space and accounting for errors due to the digitalization of signals by the controller. Our approach has two stages, leveraging counterexample guided induc...

An arbitrated quantum signature (AQS) scheme is demonstrated via the improved quantum chaotic encryption algorithm with the quantum one-time pad based on chaotic operation string. In this scheme, the signatory signs the message and the receiver verifies the signature's validity with the aid of the arbitrator who plays a crucial role when a dispute arises. Analysis shows that the signature can n...

Workflow management systems are being increasingly used by many organizations to automate business processes and decrease costs. Audit trails from workflow management systems include significant amounts of information that can be used to analyze and monitor the performance of business processes in order to improve the efficiency. Traditional approaches for using workflow audit trail for decisio...

In recent days, the amount of functions has increased significantly in embedded products so that systems development methodologies play an important role to ensure the product’s quality, cost, and time. Furthermore, this complexity coupled with constantly evolving specifications, has led to propose a semiformal development methodology to support the building of embedded real-time systems. A pla...

We investigate symbolic approaches to Bounded Model Checking (BMC) for the Linear Temporal Logic extended with epistemic components (LTLK), interpreted over Interleaved Interpreted Systems. We propose two BMC translations for LTLK one is based on SAT and the other is based on BDD which we have implemented and tested on several benchmarks. We report on our experimental results that reveal advant...

We present the optimization of a transmission grating to be used as a phase mask in photolithography. The electromagnetic fields diffracted by the structure are computed with MMP (Multiple Multipole Method). With this simple procedure a high accuracy and low computation time are achieved.

We describe a reconfigurable baseband platform capable of processing WCDMA FDD 2Mbps, 802.11b, GPS, and GSM/GPRS communications systems in real-time without requiring special purpose hardware accelerators. In addition, the processor may also perform multimedia functions and Java acceleration without special purpose hardware. Processing is performed completely in software and executes in real-ti...

Current Trusted Platform Modules (TPMs) are illsuited for use in mobile services because they hinder sharing data across multiple devices seamlessly, they lack access to a trusted real-time clock, and their nonvolatile storage performs poorly. This paper presents cloud TPM (cTPM), an extension of the TPM’s design to address these problems. cTPM includes two features: 1) a cloud seed shared betw...

This paper discusses experimental results and design issues arising from a project to implement a distributed, platform-independent GUI framework. Four different approaches for distributed-object communication are presented. Each approach is evaluated according to its execution time and engineering cost.

Object composition is often advocated as a more flexible alternative to standard class inheritance since it takes place at run-time, thus permitting the behavior of objects to be specialized dynamically. In this paper we present I-Java, an extension of the Java language with a form of incomplete objects, i.e., objects with some missing methods which can be provided at run-time by composition wi...