30 research outputs found
Combinatorial microfluidic droplet engineering for biomimetic material synthesis
Get PDFAlthough droplet-based systems are used in a wide range of technologies, opportunities for systematically customizing their interface chemistries remain relatively unexplored. This article describes a new microfluidic strategy for rapidly tailoring emulsion droplet compositions and properties. The approach utilizes a simple platform for screening arrays of droplet-based microfluidic devices and couples this with combinatorial selection of the droplet compositions. Through the application of genetic algorithms over multiple screening rounds, droplets with target properties can be rapidly generated. The potential of this method is demonstrated by creating droplets with enhanced stability, where this is achieved by selecting carrier fluid chemistries that promote titanium dioxide formation at the droplet interfaces. The interface is a mixture of amorphous and crystalline phases, and the resulting composite droplets are biocompatible, supporting in vitro protein expression in their interiors. This general strategy will find widespread application in advancing emulsion properties for use in chemistry, biology, materials and medicine
Study of intrinsic / extrinsic piezoelectric contributions in La-doped BiFeO<inf>3</inf> - PbTiO<inf>3</inf> ceramics using the Rayleigh method
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Piezoelectric properties of BiFeO – PbTiO ceramics
No full textCeramics of type (BiFeO (PbTiO have been fabricated using conventional mixed oxide synthesis. The
strain field (E)/polarisation field (PE) behaviour of compositions x =
0.80, 0.70, 0.65 and 0.60 have been studied. At high field strengths,
piezoelectricity can be instilled in these materials. The composition
x = 0.70 is observed to be the most active of those studied, with a total
strain of 0.22% and a d of 160 pm V using an electric
field strength of 18 MV m. It is not possible to determine the
magnitude of the coercive field using the PE data in these materials. The
most active composition is observed to lie outside the mixed phase region
La naturaleza cambiante de la recuperación de información en construcción (Arquitectura e Ingeniería)
Get PDFA brief analysis of the development of the Building Bibliographic Information, task in which the author worked during near 40 years is described. Outstanding Data Bases in Building are mentioned.Se hace un breve análisis de la información bibliográfica en Construcción a través del tiempo, tarea en la que participa el autor a lo largo de cerca de 40 años. Se enumeran algunas bases de datos actuales de mayor relevancia en este campo
Flux growth and characterisation of rhombohedral BiFeO<inf>3</inf>-PbTiO<inf>3</inf> single crystals
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Bar constructions for topological operads and the Goodwillie derivatives of the identity
Get PDFThesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 2005.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Includes bibliographical references (p. 105-106).We describe a cooperad structure on the simplicial bar construction on a reduced operad of based spaces or spectra and, dually, an operad structure on the cobar construction on a cooperad. Further, we show that if the homology of the original operad (respectively, cooperad) is Koszul, then the homology of the bar (respectively, cobar) construction is the Koszul dual. We use our results to construct an operad structure on the partition poset models for the Goodwillie derivatives of the identity functor on based spaces and show that this induces the 'lie' operad structure on the homology groups of these derivatives. Finally, we extend the bar construction to modules over operads (and, dually, to comodules over cooperads) and show that based spaces naturally give rise to modules over the operad formed by the derivatives of the identity.by Michael Ching.Ph.D
Opium - An Advanced Debugging System
No full textviews of executions are the basis for a trace browser. 2.1 A trace query language based on Prolog We model an execution into a trace which is a stream of events. Execution events have a uniform representation, and can be analysed by programs. At a conceptual level, only two tracing primitives are necessary to retrieve trace information on the fly: one to retrieve the information related to the current event, another one to retrieve ? in, G. Comyn and N. Fuchs editors, Proceedings of the Second Logic Programming Summer School, September 1992, Zurich. Springer-Verlag, Lecture Notes in Artificial Intelligence 636. ??? Author's current address: IRISA/INSA, Campus Universitaire de Beaulieu, F-35042 Rennes, email: [email protected] information related to the next event. A trace can be considered as a history of execution events, and the two primitives can be matched on the notions of today (current event) and tomorrow (next event). These two primitives, plus Prolog, make a powerful tra..
