منابع مشابه
[Pulmonary siderosis in an arc welder].
An arc welder of 32 years of age is presented with a random finding of miliar reticulonodular shadows in the plain film of the thorax. Subjectively and objectively the patient appears healthy. The presence of a pneumoconiosis is confirmed by biopsy. Differential diagnosis had to consider sarcoidosis and pulmonary siderosis in view of the known professional anamnesis. This case report underlines...
متن کاملMacular degeneration in an arc welder.
A male welder who had been working in an industrial machine plant for more than 20 years experienced acute intense pain in his left eye with continuous lacrimation while performing arc welding in 1997. Later in 1997, at the age of 39 yr, macular edema was found in his left eye. He was diagnosed with macular degeneration (MD) of the left eye in 2002, and with right eye MD in 2004. Radiation in t...
متن کاملAmount and distribution of fume contaminants in the lungs of an arc welder post mortem.
This study describes various post-mortem examinations of the lungs of a shipyard arc welder. These investigations comprised morphological methods, including gross pathology and radiography, histological and ultrastructural examinations, chemical analysis of lung tissue, and sensitive magnetic measurements, which can now be used to detect magnetic contaminants, such as welding fume, in human tis...
متن کاملH2/H∞ Robust Controller of the Arc Welding Inverter Power
There are a lot of interference sources in the system of the arc welding inverter power. In this paper, a small-signal model which was built by the method of statespace average was quoted. A control system which comprised an interference of load resistance and an interference of power supply fluctuation was built. A H2/H∞ state -feedback controller was designed in the method of LMI. The simulat...
متن کاملA Resonant Inverter as a Controlled Reactance
A new type o f a control led ac t ive reactance based on a h i g h frequency resonant inverter with bidirect ional swi tches i s proposed and examined. I t s important advantages over o ther approaches are: lower energy stored in react ive elements and lower harmonic distort ion.
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ژورنال
عنوان ژورنال: Journal of the Japan Welding Society
سال: 1986
ISSN: 0021-4787,1883-7204
DOI: 10.2207/qjjws1943.55.419