Functional organic materials for electronics industries

Topics closely related with organic, high molecular weight material synthesis are discussed. These are related to applications such as display, recording, sensors, semiconductors, and I.C. correlation. New materials are also discussed. General principles of individual application are not included. Materials discussed include color, electrochromic, thermal recording, organic photoconductors for electrophotography, and photochromic materials

Bayesian Estimation of DSGE Models: Is the Workhorse Model Identified?

Koop, Pesaran and Smith (2011) suggest a simple diagnostic indicator for the Bayesian estimation of the parameters of a DSGE model. They show that, if a parameter is well identified, the precision of the posterior should improve as the (artificial) data size T increases, and the indicator checks the speed at which precision improves. It does not require any additional programming; a researcher just needs to generate artificial data and estimate the model with different T. Applying this to Smets and Wouters'(2007) medium size US model, we find that while exogenous shock processes are well identified, most of the parameters in the structural equations are not.Bayesian Estimation, Dynamic stochastic general equilibrium models, Identification.

Circular dichroism study on the early folding events of β-lactoglobulin entrapped in wet silica gels

Abstractβ-Lactoglobulin is a predominantly β-sheet protein that folds by forming excess α-helices within milliseconds. In this study, the refolding of β-lactoglobulin was dramatically decelerated by entrapping in wet nanoporous silica gel matrices, and monitored on a time scale of minutes or hours by far-UV circular dichroism spectroscopy. Analysis of kinetics and transient spectra allowed to define the sequence of folding events that consist of α-helical formation, β-sheet core formation, and α-to-β transition. The results suggest that the initially formed α-helices, presumably including the native α-helix, help to guide the formation of the adjacent β-sheet core

Variational Construction of Orbits Realizing Symbolic Sequences in the Planar Sitnikov Problem

Using the variational method, Chenciner and Montgomery (2000 Ann. Math. 52 881–901) proved the existence of an eight-shaped orbit of the planar three-body problem with equal masses. Since then a number of solutions to the N-body problem have been discovered. On the other hand, symbolic dynamics is one of the most useful methods for understanding chaotic dynamics. The Sitnikov problem is a special case of the three-body problem. The system is known to be chaotic and was studied by using symbolic dynamics (J. Moser, Stable and random motions in dynamical systems, Princeton University Press, 1973). In this paper, we study the limiting case of the Sitnikov problem. By using the variational method, we show the existence of various kinds of solutions in the planar Sitnikov problem. For a given symbolic sequence, we show the existence of orbits realizing it. We also prove the existence of periodic orbits