Zobrazeno 1 - 10
of 35
pro vyhledávání: '"L B, Sorensen"'
Publikováno v:
Journal of Rehabilitation Medicine. 17:173-182
The prevalence of back and joint impairments was studied in a representative subsample of 77 women and 57 men aged 79. Forty-six per cent of the subjects had no history of back or joint complaints. Thirty-two per cent reported current back pains whil
Publikováno v:
Physical Review Letters. 83:2741-2744
Publikováno v:
Physical Review Letters. 54:920-923
Autor:
E. Chason, Peter S. Pershan, L. B. Sorensen, A.L. Greer, Alex H. Weiss, Kenneth F. Kelton, Frans Spaepen
Publikováno v:
Physical Review B. 32:3399-3408
Publikováno v:
Physical Review Letters. 52:356-359
The phase diagram of freely suspended thin films of heptyloxybenzylidene-heptylaniline shows dramatic changes for thicknesses below 22 layers. The most surprising feature of the phase diagram is the inclusion of two phases lacking long-range crystall
Publikováno v:
Physical Review Letters. 54:1694-1697
X-ray scattering measurements are reported for critical smectic-${A}_{2}$ fluctuations along a line of second-order transitions between the smectic-${A}_{1}$ and smectic-${A}_{2}$ phases in mixtures of hexylphenyl cyanobenzoyloxy benzoate (D${\mathrm
Publikováno v:
Physical Review Letters. 47:43-46
Light scattered from the driven free surface of the smectic-$A$ phase of octyloxy cyanobiphenyl (8OCB) provides a low-frequency measurement of second sound. This yields an absolute measurement of the smectic elastic constant, $B$. There is no dispers
Autor:
J. Collett, J. D. Litster, Robert J. Birgeneau, L. B. Sorensen, Jens Aage Als-Nielsen, Peter S. Pershan
Publikováno v:
Physical Review Letters. 49:553-556
This paper reports an x-ray diffraction study of structures and restacking transitions within the $B$ phases of heptyloxybenzylidene-heptylaniline. The system evolves from a hexagonal close-packed structure, through intermediate orthorhombic and mono
Publikováno v:
Physical Review A. 29:2741-2750
A new technique which provides an absolute measurement of the smectic elastic constant $B$ is presented. This technique measures second sound on samples whose top surface is an air---liquid-crystal interface. The free surface of the sample is electri
Publikováno v:
Molecular Crystals and Liquid Crystals. 67:165-175
A new technique for studying the second sound mode in smectic liquid crystals has been developed. Preliminary measurements for the smectic A phase of 4-n-octyloxy-4'-cyanobiphenyl (80CB) are described. We have developed a technique to prepare well al