Abstract Securing distributed device communication is critical because the private industry and military depend on these resources. One area that adversaries target middleware, which medium connects different systems. This paper evaluates a novel security layer, DDS-Cerberus (DDS-C), protects in-transit data improves efficiency data-first distribution research contributes robotics operating sys...

Frequency synthesizers come in a variety of forms ranging from tiny PLL chips and moderate-size modules to bench-top signal generators [1-5]. Single-chip synthesizers are available in a die form or as surface-mount integrated circuits. They include key elements (such as RF and reference dividers, phase detector, lock indicator, etc.) required to build a simple single-loop PLL synthesizer. More ...

This paper describes the design and implementation of a ROM-Less Direct Digital Frequency Synthesizer (DDS) using Bezier curve approximation. With Bezier curve approximation, phase values between 0 to π are mapped to sine amplitudes. Then, half wave symmetry of sine wave is exploited to construct full sine wave. The proposed approximation introduces maximum error of 7.9×10, which is equivalent ...

Assuring end-to-end QoS in enterprise distributed real-time and embedded (DRE) systems is hard due to the heterogeneity and transient behavior of communication networks, the lack of integrated mechanisms that schedule communication and computing resources holistically, and the scalability limits of IP multicast in wide-area networks (WANs). This paper makes three contributions to research on ov...

The paper presents a prototype of the NSLS-II high level application environment including key middle layer servers, such as Machine, Online Model and Virtual Accelerator. The proposed environment is developed and evaluated on top of EPICS-DDS, an open source implementation of the DDS standard interface based on the EPICS Channel Access protocol.