Stress-relieving heat treatment is reported to accelerate the elastic memory process in order that the configuration of cold-worked orthodontic wires becomes more stable. In this experiment, 3 methods of stress-relieving O.036-inch cobaltchromium orthodontic wires used in the fabrication of spacemaintaining appliances were evaluated. The results showed that stress relief in a dental oven, by th...

This paper describes the development and evaluation of neural network-based systems for industrial welding process control and weld quality assessment. The developed systems utilize recurrent neural networks for process control and both recurrent networks and static networks for quality prediction. The first section describes a system capable of both welding process control and real-time weld q...

Media coverage was vital in establishing the popular reputation of Abstract Expressionists. Reporting regularly relied on photographic portraits to present these artists as modernist innovators who were an extension (or even a replacement for) work art. Jackson Pollock came epitomize Expressionist artist, with “action” photographs capturing his radical painting method. Pollock’s contemporary, A...

Abstract Plant turnarounds are one of the most critical events in Saudi Arabian oil and gas industries. Shutdowns have potential to affect plant’s cash flow objectives either a constructive nor bad way. A heat exchanger is an essential equipment for some procedures refineries plant it will decide shutdown span. In exchanger, welded tube tubesheet joint basic factor which requires different qual...

Electrical welding arcs emit an intense and extended spectrum of radiation ranging from infrared to ultraviolet. The cornea and lens absorb the ultraviolet range giving rise to painful keratoconjuntivitis.1-3 Radiation in the visible and near infrared range (400-1400 nm wavelength) penetrates deep into the eye and, if sufficient in intensity, may damage the retina. Although welding induced phot...

*Correspondence: Alfonso Maffezzoli , Materials Science and Technology Group, Department of Engineering for Innovation, University of Salento, via per Monteroni, Lecce 73100, Italy e-mail: alfonso.maffezzoli@ unisalento.it Thermoplastic matrix composites are finding new applications in different industrial area, thanks to their intrinsic advantages related to environmental compatibility and pro...

Welding processes that generate fumes containing toxic metals, such as hexavalent chromium (Cr(VI)), manganese (Mn), and nickel (Ni), have been implicated in lung injury, inflammation, and lung tumor promotion in animal models. While federal regulations have reduced permissible worker exposure limits to Cr(VI), this is not always practical considering that welders may work in confined spaces an...

OBJECTIVES The aim of this study was to evaluate the coexisting factors and usefulness of diagnostic methods in metal-induced asthma in Polish welders. MATERIALS AND METHODS Examination of 50 welders occupationally exposed to metals and with suspicion of metal-induced asthma (group A), 100 welders occupationally exposed to metals but without suspicion of metal-induced asthma (group B), and tw...