An electrical probe is constructed of a small capacitor in contact with the circuit node under test so as not to load this circuit node and cause distortion of the input signal. The small capacitor is then placed in series with the small input resistance of a terminated coaxial signal line. The voltage signal at the output of the coaxial line will be approximately the product of the small capac...

Photocatalytic self-cleaning textile fibers have been created using coaxial electrospinning. This is accomplished by electrospinning cellulose acetate as the core phase and a dispersion of nanocrystalline TiO2, a well-known photocatalyst, in the sheath phase. A simple deacetylation step after the initial electrospinning yields self-cleaning textile fibers. Self-cleaning activity is exhibited at...

An all-dielectric coaxial waveguide that can overcome problems of polarization rotation and pulse broadening in the transmission of optical light is presented here. It consists of a coaxial waveguiding region with a low index of refraction, bounded by two cylindrical, dielectric, multilayer, omnidirectional reflecting mirrors. The waveguide can be designed to support a single mode whose propert...

To decrease the risk of iatrogenic thromboembolic complications during interventional procedures with coaxial catheter systems, aspirin and systemic heparinization were used in 57 consecutive cases. No thromboembolic complications occurred. This group was compared with a second group of 25 patients who also had interventional procedures with coaxial systems but who had only a continuous heparin...

The Direct Simulation Monte Carlo (DSMC) method is used to numerically simulate and design a micronozzle with improved performance. Thrust calculations using the DSMC method demonstrate that the coaxial micronozzles can achieve milli-Newton thrust levels with specific impulses on the order of 45 s using argon in a cold gas expansion. Improved micronozzle designs of coaxial microthrusters are al...

Using an asymptotic formalism we developed in an earlier paper, we compare the dispersion properties of the air-core Bragg fiber with those of the coaxial Bragg fiber. In particular we are interested in the way the inner core of the coaxial fiber influence the dispersion relation. It is shown that, given appropriate structural parameters, large single-mode frequency windows with a zero-dispersi...

Background: Lens surgery with multifocal IOL implantation for presbyopia correction is performed by femtosecond laser-assisted lens or conventional phacoemulsification. Objective: To compare the clinical results of low-energy pulse phacoemulsification intraindividually. Methods: Charts from patients who underwent Refractive Exchange (RLE) in a single center, Femtosecond Laser-Assisted Surgery (...

Phacoemulsification is the technique of choice for most cataract surgeons worldwide. This technique can have complications at any of its stages, including intra or post-operative stages. The frequency of the presentation of intraoperative complications varies according to the surgeon’s experience [1], the type of cataract and whether suitable instruments are used [2]. Capsular blockage syndrome...

by pseudoexfoliation syndrome, uveitis, posterior synechiae, trauma or previous intraocular surgery . A significant number of patients who present for phacoemulsification cataract surgery have pupils that do not respond adequately despite several pharmacological attempts with different mydriatic agents. Inadequate pupil dilation can decrease visualization during all stages of the phacoemulsific...