this study is focused on investigating the parameters of laser percussion drilling process of nickel-base super alloy inconel 718 with thickness of 1 mm. fiber laser with the power of 500 watts was used as the laser source. laser pulse frequency, duty cycle, laser power, focal point position, were assumed as the laser drilling process variables. the hole geometry features, i.e. entrance hole di...

The Diagnodent device is based on principles of caries detection by laser fluorescence which were developed in Sweden in the mid-1980s. Since that time, several lasers have been employed for caries detection (such as the argon, carbon dioxide, and excimer lasers). These systems are however more complex to use and more expensive than the visible red diode laser system upon which Diagnodent® is b...

Silicon photovoltaic cells have design and material requirements different from those of most other silicon electronic devices. Not only are nearly ideal silicon surfaces required, but also the bulk properties must be of uniform high quality for high-energy conversion efficiency. In this paper, emission spectra of laser-generated plasmas from titanium dioxide antireflection coatings in solar ce...

Introduction: The aim of this study was to compare the functional outcomes of swallowing act detected by videofluoroscopy of two different techniques in the treatment of laryngeal carcinoma.   Materials and Methods: This study was conducted on 41 patients undergoing two supraglottic laryngectomy techniques. The research population was assigned into two groups of open and laser supraglottic lary...

Fractional resurfacing may be used in the management of melasma, striae/stretch marks, acne scars, pearly penile papule, syringoma, burn scar, verrucous epidermal naevus and skin tightening. In 20-30% of the patients with melasma, fractional resurfacing may not be effective or may even cause an exacerbation. Treatment effects may also be temporary. When compared with traditional carbon dioxide ...