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Metrics that aggregate the state of neighboring nodes are frequently used in wireless sensor networks. In this paper, we present two primitives that exploit simultaneous communications in 802.15.4 radios to enable a polling node to calculate with low power the number (or set) of its neighbors where some state predicate of interest holds. In both primitives,(More)
This paper deals with challenges in federating wireless sensing fabrics. Federations of this sort are currently being developed in next generation global end-to-end experimentation infrastructures, such as GENI, to support rapid prototyping and hi-fidelity validation of protocols and applications. On one hand, federation should support access to diverse(More)
This chapter describes an architecture for slicing, virtualizing, and federating wireless sensor network (WSN) resources. The architecture, which we call KanseiGenie, allows users—be they sensing/networking researchers or application developers—to specify and acquire node and network resources as well as sensor data resources within one or more facilities(More)
As a first step towards predictable, repeatable WSN experimentation, we propose the resource specification language LENS (a.k.a. Language for Embedded Networked Sensing) for WSN experimentation infrastructures. Using the Resource Description Framework (RDF) and the Web Ontology Language (OWL), LENS defines a semantic ontology for WSN resources; LENS enables(More)
In Escherichia coli cell division is driven by the tubulin-like GTPase, FtsZ, which forms the cytokinetic Z-ring. The Z-ring serves as a dynamic platform for the assembly of the multiprotein divisome, which catalyzes membrane cleavage to create equal daughter cells. Several proteins effect FtsZ assembly, thereby providing spatiotemporal control over cell(More)
The energy efficiency of the widely used convergecast pattern depends substantially on the choice of medium access control (MAC) and routing protocol. In this paper, we formalize the maximization of convergecast energy efficiency with respect to its MAC and routing as a resource constrained optimization problem. We then analytically show that this(More)
Cell division in most prokaryotes is mediated by FtsZ, which polymerizes to create the cytokinetic Z ring. Multiple FtsZ-binding proteins regulate FtsZ polymerization to ensure the proper spatiotemporal formation of the Z ring at the division site. The DNA-binding protein SlmA binds to FtsZ and prevents Z-ring formation through the nucleoid in a process(More)
Few reports have explored laparoscopic adnexal tumorectomy as a treatment for large and symptomatic ovarian leiomyomas during pregnancy. The current study presents the case of a patient with a large and symptomatic ovarian leiomyoma at 14 weeks of pregnancy. A laparoscopic adnexal tumorectomy was performed without complications. The laparoscopic management(More)
This paper is an attempt to provide a language front-end to synthesise asynchronous control circuits using NCL technology. The target implementation being delay insensitive (DI), the specification language should be DI as well. Delay Insensitive Sequential Processes (DISP) is a process algebra where the behaviour of asynchronous control logic blocks is(More)
Wireless sensor network (WSN) applications vary widely in their traffic and node density patterns. Conventional wisdom says that a medium access control (MAC) protocol that performs well for one application can perform poorly for another. Perhaps as a result of this view, a large number of MAC protocols have been proposed, often with specific performance(More)