In this paper, we study the two-tiered wireless sensor network (WSN) architecture and propose the optimal cluster association algorithm for it to maximize the overall network lifetime. A two-tiered WSN is formed by number of small sensor nodes (SNs), powerful application nodes (ANs), and base-stations (BSs, or gateways). SNs capture, encode, and transmit relevant information to ANs, which then ...

We propose Mote Herding, a new system architecture for large scale, heterogeneous sensor networks. Mote herding uses a mix of many 8-bit sensor nodes (motes) and fewer but more powerful 32-bit sensor nodes (microservers). Mote herding groups motes into flocks that are connected via a multihop network to a microserver acting as a shepherd. Shepherds exploit their greater communications and compu...

The current healthcare delivery paradigm is defined by integrative care delivery across disparate providers and services. Therefore the ability to deliver efficient and effective healthcare services is dependent on designing and implementing interoperable systems. However, the notion of interoperability is multifaceted and complex. Although the exchange of data is often described as analogous w...

A team of experts in biology, chemistry, and toxicology has developed a protocol to help industrial scientists detect endocrinedisrupting tendencies early in the chemical development process. What sets the Tiered Protocol for Endocrine Disruption (TiPED) apart from the protocols typically used to assess product safety is its incorporation of what the authors believe to be the best assays for de...

Nearly all personal computer and workstation processors, and virtually all high-performance embedded processor cores, now embody instruction level parallel (ILP) processing in the form of superscalar or very long instruction word (VLIW) architectures. ILP processors put much more of a burden on compilers; without “heroic” compiling techniques, most such processors fall far short of their perfor...