Kevin G. Brady

PWB warpage analysis and verification using an AP210 standards-based engineering framework and shadow moire

Thermally induced warpage of printed wiring boards (PWB) and printed wiring assemblies (PWAs) is an increasingly important issue in managing the manufacturing yield and reliability of electronic devices. In this paper, we introduce complementary simulation and experimental verification procedures capable of investigating warpage at the local feature level as well as the global PWB level. Simulation within a standards-based engineering framework allows efficient introduction of detailed feature information into warpage models of varying fidelity. Experimental results derived from temperature-dependent shadow moire provide a rapid high resolution picture of local warpage in critical regions. We describe initial results for two unpopulated PWB test cases which indicate a promising outlook for the methodology.

Testing the Nation's Healthcare Information Infrastructure: NIST Perspective

The National Institute of Standards and Technology is enabling the development of an integrated healthcare information infrastructure by developing test tools and techniques that will facilitate seamless exchange of information across the healthcare enterprise.

A general conformance testing framework for IEEE 11073 PHD's communication model

ISO/IEEE 11073 Personal Health Data (IEEE 11073 PHD) is a set of standards that addresses the interoperability of personal healthcare devices. As an important part of IEEE 11073 PHD, ISO/IEEE 1107-20601 optimized exchange protocol (IEEE 11073-20601) defines how personal healthcare devices communicate with computing resources like PCs and set-top boxes. In this paper, we propose a general conformance testing framework for IEEE 11073-20601 protocol stack. This framework can be used to ensure that different implementations of the protocol stack conform to the specification and are thus able to interoperate with each other. We are developing a prototype research tool that applies the proposed framework to Antidote, an open-sourced IEEE 11073-20601 protocol stack. We report some preliminary testing results.