Correlated and Decorrelated Positional and Orientational Order in the Nucleosomal Core Particle Mesophases

We investigate the orientational order of transverse polarization vectors of long columns of nucleosomal core particles and their coupling to positional order in high density mesophases discovered recently. Inhomogeneous polar ordering of these columns precipitates crystalization of the 2D sections with different orientations of the transverse polarization vector on each column in the unit cell. We propose possible scenarios for going from the 2D hexagonal phase into distorted lamellar and related phases observed experimentally.Comment: 4 pages and 2 figure

Influence of anchoring in AFLC cells: Electro optical scanning

Antiferroelectric liquid crystals have gained a lot of interest in the last few years. In the case of ferroelectric liquid crystals, it is generally assumed that in a confined geometry the surface only has a minimal influence on the bulk when the thickness of the cell is much larger than the pitch of the helix. Some studies have shown that this rule doesn’t apply in the antiferroelectric liquid crystals case. In this contribution we study an antiferroelectric liquid crystal (MHPOBC) in a confined geometry by electro-optical scanning measurements

Cytoskeleton influence on normal and tangent fluctuation modes in the red blood cells

We argue that the paradoxal softness of the red blood cells (RBC) in fluctuation spectra experiments is apparent. We show that the effective surface shear modulus $\mu_s$ of the RBC obtained from fluctuation data and that measured in static deformation experiments have the same order of magnitude. A simple micromechanical model of the RBC developped for this purpose accounts for the influence of a finite-thickness cytoskeleton on the fluctuations of the composite membrane-cytoskeleton system. The spectrin network cytoskeleton with the bulk shear modulus estimated as $\mu\approx105\div 165$ Pa contributes to both normal and tangent fluctuations of the system and confines the fluctuations of the lipid membrane. The ratio of mean square amplitudes of the RBC normal and tangent fluctuations $/$ calculated in the frame of the model is 2-3 orders of magnitude smaller that it is in the free membrane with the same bending and shear moduliComment: 14 pages, 4 figure

The Doctrine of Justification by Faith the Leimotif of the Apology of the Augsburg Confession

The purpose of this thesis is not to present Catholic doctrine and refute it, but, self-evidently, to show that the Doctrine of Justification by Faith is the Leitmotif of the Apology. We make no claim that we have accomplished our purpose, or that we have done justice to this great Christ centered Confession of the Evangelical Lutheran Church. We have only scratched the surface of this document so rich in Christian doctrine. Melanchthon was a master-mind, and it takes a master-mind to follow him

Real Johnson-Wilson Theories and Computations

Our main result is a computation of ER(n)^*(CP^\infty), the Real Johnson-Wilson cohomology of CP^\infty, for all n. We apply techniques from equivariant stable homotopy theory to the Bockstein spectral sequence. We produce permanent cycles, compute differentials, and solve extension problems to give an explicit description of the ring ER(n)^*(CP^\infty). In the case n=1, our results reproduce KO^*(CP^\infty) as computed by Sanderson, Fujii, Yamaguchi, and Bruner and Greenlees. In the case n=2, our result yields the TMF_0(3)-cohomology of CP^\infty after a suitable completion. This thesis forms part of a program to compute the ER(n)-cohomology of basic spaces. We conclude with a discussion of work in progress with Kitchloo and Wilson on the ER(n)-cohomology of CP^k, classifying spaces of various groups, and Eilenberg-MacLane spaces, as well as future directions and possible applications to topology and geometry. We include an appendix which proves some lemmas in equivariant stable homotopy theory used in our computations