A photonic crystal fiber (PCF) with embedded coupler is demonstrated for strain measurement. The embedded coupler is constructed by the selective filling of one of the air holes in the PCF. Light propagated in the fiber core can be efficiently coupled to the liquid-filled rod waveguide under phase-matching conditions, resulting in sharp decreasing of resonant wavelength intensity. The highest s...

N previous papers (JINKS 19544,1956) the analysis of the parents, F,’s, F2’s and I backcross generations of an 8 x 8 diallel between inbred varieties of Nicotiana rustica using the method of diallel analysis described by JINKS and HAYMAN (1953) , and extended by SINKS (1954) , HAYMAN (1954) , DICKINSON and JINKS (1956) and JINKS (1956) have been presented. They showed that nonallelic interactio...

In a family study of all patients with multiple sclerosis (MS) in Orkney, the number of inbred among patients, although high for Britain, is not higher than the number among controls, and the inbreeding coefficients appear to eliminate recessive involvement of rare genes from the aetiology. The kinship coefficients show that the ancestries of patients and controls are closely enmeshed, and elim...

Young mice of a selected line of the dilute brown strain of mice exhibit over the range 15-25 degrees C. (body temperature) a relation of frequency of breathing movements to temperature such that when fitted by the Arrhenius equation the data give a value for the constant micro of 24,000+/- calories or, less frequently, 28,000+/-. Young mice of an inbred albino strain show over the range 15-20 ...

EASUREMENT of population change resulting from selection has been one of the useful approaches in the study of quantitative inheritance (see, for example, MATHER and HARRISON 1949; MACARTHUR 1949; LERNER and DEMPSTER 1951; BELL, MOORE and WARREN 1955; FALCONER 1955; ROBERTSON 1955; CLAYTON, MORRIS, and ROBERTSON 1957; MARTIN and BELL 1960; FRASER and KINDRED 1960; THODAY and BOAM 1960; WOLFE 19...

We fit a two-parameter Weibull regression model by maximum likelihood estimation (MLE) to filtered surface roughness data. These data were acquired with scanning confocal laser microscopy performed on aluminium alloy AA 5754-O surfaces that were subjected to a range of plastic strain intensities in three different in-plane strain modes. Noting that one of the two Weibull regression parameters i...

Raman spectroscopy is used to measure the strain in individual single-wall carbon nanotubes, strained by manipulation with an atomic-force-microscope tip. Under strains varying from 0.06%-1.65%, the in-plane vibrational mode frequencies are lowered by as much as 1.5% (40 cm(-1)), while the radial breathing mode (RBM) remains unchanged. The RBM Stokes/anti-Stokes intensity ratio remains unchange...

The strain sensitivity of a two-mode birefringent side-hole fiber is measured in the spectral domain. In a simple experimental setup comprising a broadband source, a polarizer, a two-mode birefringent side-hole fiber under varied elongations, an analyzer and a compact spectrometer, the spectral interferograms are resolved. These are characterized by the equalization wavelength at which spectral...

The effect of stitching on mode I and mode II strain energy release rates for debond configurations is studied using an analysis based on plate finite elements and the virtual crack closure technique. The stitches were modeled as discrete nonlinear fastener elements with a compliance determined by experiment. The axial and shear behavior of the stitches was considered with both the compliances ...