In femtosecond laser ophthalmic surgery tissue dissection is achieved by photodisruption based on laser induced optical breakdown. In order to minimize collateral damage to the eye laser surgery systems should be optimized towards the lowest possible energy threshold for photodisruption. However, optical aberrations of the eye and the laser system distort the irradiance distribution from an ide...

Transcranial magnetic stimulation (TMS) is a non-invasive brain stimulation technique that allows for in vivo examination of cortical processes. In 1985, Barker et al. introduced TMS as a tool for investigating the functional state of the motor pathways in patients with neurological disorders as well as in healthy human subjects (Barker et al., 1985). It was shown that a single TMS pulse applie...

In a positron-sensitive probe composed of a plastic scintillator and a bismuth germanate (BGO), scattered annihilation photons in the plastic scintillator become background counts. Although these scattered annihilation photons can be rejected by higher threshold level settings for the scintillation pulse of the plastic scintillator and for that of the BGO, the system sensitivity is reduced. We ...

BACKGROUND AND OBJECTIVE Laser-assisted tissue repair is often accompanied by a high dehiscence rate, which may be due to alterations in suture material after laser exposure. The goal of this study was to investigate the effect of CO2 laser irradiation on the tensile strength of microsurgical suture material. STUDY DESIGN/MATERIALS AND METHODS 10-0 nylon and 25 microns stainless steel threads...

objective: electroporation is the most common method used for the transfection of dna. although this method has been attributed for various cell using different buffer compositions, the effects of dna concentration on the transfection efficiency has not yet been studied. here the correlation between the efficiency of electroporation reaction and increments of dna concentration has been investig...

Abstract We present the temporal characterization of infrared pulses with spectra extending from 0.55 to 2.5 μ m by using frequency resolved optical switching (FROSt) technique. The are obtained broadening femtosecond at 1.75 central wavelength in a two-stage hollow core fiber setup. This work demonstrates capability FROSt technique temporally characterize ultra-broadband spectra. Being free ph...

in this paper, the effect on the strength properties of high strength concrete (hsc) manufactured with silica fume (sf) and ground pumice (gp) is investigated. portland cement was replaced with sf, gp and combination of sf and gp up to 25%. 22 different concrete mixtures with these replacement ratios were produced by using 0.25 water-binder ratio. the ultrasound pulse velocity, compressive, spl...

   Micro-electroactive polymers have wide applications from industry to healthcare. Artificial muscles, microvalves, microswitches, haptic sensing, blood pressure and pulse monitoring are some potential applications for micro-electroactive polymers. The most advantage of micro-electroactive polymers as sensors and actuators is bio-compatibility and low power threshold for large deformations...

Ultrasonic pulse velocity technique is one of the most popular non-destructive techniques used in the assessment of concrete properties. However, it is very difficult to accurately evaluate the concrete compressive strength with this method since the ultrasonic pulse velocity values are affected by a number of factors, which do not necessarily influence the concrete compressive strength in the ...