Materials Literature
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Spherical and one-dimensional fibrillar nanostructures based on the donor acceptor conjugated polymer poly[4,4-bis(2-ethylhexyl)-cyclopenta[2,1-b;3,4-b′]dithiophene-2,6-diyl-alt-2,1,3-benzoselenadiazole-4,7-diyl] (PCPDTBSe) were synthesized by Christopher M. MacNeill, Elizabeth G. Graham, and Nicole H. Levi-Polyachenk…
There have been fascinating breakthroughs in organic thermoelectric (TE) materials/composites during the last several years, some of which are reaching the marketplace. On page 737 (DOI: 10.1002/polb.23482), Qinglin Jiang, Congcong Liu, Jingkun Xu, Baoyang Lu, Haijun Song, Hui Shi, Yuanyuan Yao, and Long Zhang present…
This document describes the development and approach for the radiological characterization of Cf-252 sealed sources for shipment to the Waste Isolation Pilot Plant. The report combines information on the nuclear material content of each individual source (mass or activity and date of manufacture) with information and…
A weekly roundup of information on newly offered instrumentation, apparatus, and laboratory materials of potential interest to researchers.
The 32nd Electrical Insulation Conference will be held in Philadelphia, PA, between the 8th and 11th of June 2014 (see sites.ieee.org/eic) and will feature, as is tradition, an invited lecture by the recipient of the Thomas W. Dakin Award. The award is made biannually, and the recipient for 2014 is Professor John Foth…
In this work we present a new model for the form factor of a star polymer consisting of self-avoiding branches. This new model incorporates excluded volume effects and is derived from the two point correlation function for a star polymer.. We compare this model to small angle neutron scattering (SANS) measurements fro…
By introducing the second organic N-heterocyclic ligands 2,2 0 -bipyridine (2,2 0 -bipy)/1,10-phenanthroline (phen), two mono-/bi-nuclear examples of Cu(II)-diphosphonate coordination polymers based on 1- hydroxyethylidenediphosphonic acid (H5 L=C H 3C(OH)(PO3H2)2), (Cu(H4L)2(2,2 0 -bipy))� H2O 1 and (Cu(H3- L)(phen))…
En esta memoria se recogen los resultados sobre preparacion y caracterizacion de las propiedades fisicas de sistemas magneticos nanoestructurados. Para la fabricacion de las nanoestructuras se han empleado dos estrategias diferentes: la estrategia ascendente (bottom?up), que se basa en el autoensamblaje de componentes…
The modern intertial navigation devices often utilize elastic suspension based sensitive elements. In general elastic suspension has a complicated structure, and its optimization requires numerous calculations for various parameters, such as stiffness characteristics. The major contribution to the solution of the abov…
Engenharia Metalurgica, Materiais e de Minas Com a tendencia de aumento da complexidade geometrica dos paineis de cobertura dos automoveis, aumento de resistencia mecânica e diminuicao da espessura dos materiais, a estampagem dessas pecas tem tornado cada vez mais dificil. Neste contexto, dois graus de acos que exibem…
Adenosine is found throughout the brain and is an important signaling molecule. Fast-scan cyclic voltammetry (FSCV) at carbon-fiber microelectrodes is an electrochemical technique which allows rapid detection of neurotransmitters in vivo, and has become increasingly popular for adenosine detection in the brain.
Superstructure ~ can be defined as all structure above substructure both internally and externally. Primary Elements ~ basically components of the building carcass above the substructure excluding secondary elements, finishes, services and fittings.
A mathematical model has been developed to study the impact of nozzle-catalyst distance and bulk gas temperature on the conversion and hydrogen evolution rate in a spray pulse reactor. The effects of reactor configuration and operating parameters on conversion and evolution rate were predicted with more than 90% accur…
Este trabalho apresenta um estudo para a obtenção de filmes finos obtidos com um polieletrólito natural e sintético, tal como o ácido húmico (AH) e o híbrido formado pela encapsulação de nanopartículas de platina na matriz de cloreto de 3-n-propilpiridínio silsesquioxano (Pt-SiPy+Cl-). Mesmo se tratando de moléculas d…
This thesis deals with the spectral theory of Schroedinger and CMV operators. Specifically, it concentrates on regularity properties of the spectrum, and on operators that arise from irrational rotations of the circle. Joint work with David Damanik, Darren Ong, and William Yessen is contained herein.
EIT shows potential for monitoring fast changing conductivity profiles, such as heart and lung physiology and chemical processes. In such cases, the measurements which constitute an EIT frame are not taken simultaneously. Several approaches have been proposed to interpret such data, but have not been systematically co…
Cellulose nanocrystals (CNCs) are frequently prepared by sulfuric acid hydrolysis of a purified cellulose starting material. CNC yields, however, are generally low, often below 20%. This study employs response surface methodology to optimize the hydrolysis conditions for maximum CNC yield. Two experimental designs wer…
Implementation of efficient methods to handle calculations in EIT is a key issue to address 3D electrical property reconstructions. Following a transport back-transport method, we develop in this work an adjoint approach and define explicit forward and back-projection operators. It allows reducing the size of matrices…
A recente popularizacao das passarelas estaiadas de madeira no mundo motivou o desenvolvimento dopresente trabalho, onde e dado destaque aos materiais utilizados, a tipologia adotada e os principaisparâmetros geometricos usados nos projetos. Apresenta-se, tambem, uma serie de exemplos de passarelasconstruidas em diver…
The article investigates the forced oscillation of plate on an elastic foundation, taking into account the creep of the material. The solution of this problem is obtained by the Bubnov - Galerkin method based on a several waveforms.To investigate the stability of complex oscillation of plate-shell structures, which ar…