The paper provides a comparative analysis of the influence ring concentrator shape in ultrasonic systems on their amplitude-frequency characteristics. Devices are known which elastic elements used either as resonators or working tools technological systems. However, use concentrators vibrations is insufficiently studied and requires comprehensive research development recommendations for practic...

Electrical discharge machining (EDM) process is one of the most commonly used nonconventional precise material removal processes. Electrical discharge machining (EDM) is a process for shaping hard metals and forming deep complex shaped holes by arc erosion in all kinds of electroconductive materials. Erosion pulse discharge occurs in a small gap between the work piece and the electrode. This re...

Abstract Increasing demands on component properties are leading to the development of high-performance materials for which conventional production methods reaching their limits from an economic and ecological point view. In recent years, two technologies have been developed that show great potential compared machining processes, particularly in such as titanium alloy Ti-6Al-4V. Ultrasonic-assis...

A b st ra ct Purpose: The esophageal Doppler monitoring (EDM) has emerged as an alternative to the pulmonary artery catheter (PAC). The purpose of this study is to better deÞ ne its role in the ICU. Materials and Methods: Retrospective review of Hemosonic™ 100 EDM probe use between 2003 and 2005. Patientand EDM-related characteristics, indications, complications, resuscitation end points (lacta...

Electro Discharge Machining (EDM) is a noticeable machining practice among created unconventional machining procedures for intricate, complex profiles in "hard to machine" materials, similar to heat-treated steels, composites, superalloys, ceramics, composites, carbides, and so on. In EDM, the material expulsion of the cathode is accomplished through precise controlled electric discharge (the s...

Electro Discharge Machining (EDM) is a very efficient machining process widely used in manufacturing components of complicated geometry. Based on its nature, i.e. material removal by electric discharge, the process induces thermal stresses that in turn result in generation of wide spread micro-cracks on the surface of the machined part. In this paper the influence of EDM characteristic paramete...

PURPOSE The purpose of this study was to compare intraoperative parameters between femtosecond laser-assisted cataract surgery (FLACS) and conventional phacoemulsification using Centurion® Vision System with Active Fluidics. SETTING This study was performed at Brasília Ophthalmologic Hospital, Brasília, Federal District, Brazil. PATIENTS AND METHODS This was a prospective randomized compara...