By photographing the corneal reflex in two positions of gaze and measuring the radius of curvature of the cornea it is possible to calculate the radius of rotation of the eye. The measurements obtained in this way showed a high correlation with refraction in a series of 80 eyes. The axial length obtained by this method was about 3 mm greater than that obtained by ultrasonographic or x-ray metho...

INDEX OF SYMBOLS A Area enclosed by coil a Coil mean radius b Coil axial thickness c Coil radial thickness D Side length of square coil d Wire-to-wire spacing K Nagoaka coil constant l Coil length p Perimeter enclosed by coil P, F Grover disk coil constants R Circular wire radius s Side length of generic polygon w Trace width x, y Mean side lengths of rectangular coil μo Magnetic permeability o...

In the title mol-ecule, C18H21Cl2N3, the tri-aza-cyclo-hexane ring adopts a chair conformation with both 4-chloro-phenyl substituents in axial positions and the propyl group in an equatorial site. The dihedral angle between the planes of the benzene rings is 49.5 (1)°. In the crystal, mol-ecules are arranged in a head-to-tail fashion, forming columns along [010], and pairs of weak C-H⋯π inter-a...

This paper proposes a method for determining the optimum antenna weights needed to improve the radiation efficiency in the distributed-feed method for mobile handsets. A test signal from a random wave source embedded in a phantom is employed to optimize the weights. In order to eliminate the affects of polarized waves, the test signal source employs a tri-axial antenna and a random function. We...

In this work, we show that the magneto-inductive (MI) indoor localization using tri-axial coils possesses unique advantages over the RF-based techniques. The spatial distribution of a generated magnetic field strength can be easily predicted using simple linear models. In addition, the field strength is very stable over time, even in the presence of moving people, which makes MI localization a ...

The DENIS/ISOGAL near/mid-IR survey of the Milky Way for the first time probes stellar populations in the innermost obscured regions of our galaxy. Ages, metallicities and extinction-corrected luminosities are derived for these stars individually. An old metal-rich population dominates in the inner galactic Bulge, but there are also indications for the presence of a younger population. The inne...

Recently introduced surface nanoscale axial photonics (SNAP) makes it possible to fabricate high-Q-factor microresonators and other photonic microdevices by dramatically small deformation of the optical fiber surface. To become a practical and robust technology, the SNAP platform requires methods enabling reproducible modification of the optical fiber radius at nanoscale. In this Letter, we dem...

Through laboratory simulation experiments, this paper studies the influence of different temperature and stress conditions on strain changes raw coal samples induced by CO2 adsorption with tri-axial creep-seepage adsorption-desorption experimental system. Comparing analyzing results, study shows that: (1) within a certain time, axial radial sample both show growing trend as time increases for i...