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Surveys were made to determine whether susceptibility to depressive illness and to myocardial infarction of people living in Wolverhampton was related to the intensity of 50 Hz magnetic field outside their homes. Comparing case with control addresses it was found that the field strength was significantly higher for depressive illness (P = 0.033) but not for(More)
Rats were exposed twice daily for 6 weeks to diluted smoke derived from cigarettes with a range of deliveries of particulate matter. The inhaled smoke reached the alveolar surface, increased the size and number of free macrophages and provoked epithelial metaplasia but did not appear to alter the lymphoid reaction to spontaneous infection. The hypertrophy(More)
Rats were exposed twice daily for 6 weeks to diluted smoke derived from cigarettes with a range of deliveries of particulate matter. The inhaled smoke caused squamous metaplasia and keratinising hyperplasia in the larynx and goblet cell hyperplasia in the nasal cavity, trachea and intrapulmonary bronchus. Squamous metaplasia occurred in the larynx of almost(More)
This paper describes a dosimetry experiment on rats which was designed to make a contribution towards the optimisation of exposure conditions for inhalation toxicology studies with smoke aerosols. The main conclusions drawn from the work are: (i) Under continuous exposure conditions the deposition of total particulate matter (TPM) in the respiratory system(More)
This article introduces the concept of output observer to chaos synchronisation applications. Here output observer is understood as a low order system designed to estimate a single measured variable of a higher order system only. In this work we show how this notion can be used to evaluate nonlinear systems with single output, being a chaotic state variable(More)
Calculations of total particulate matter (TPM) dose applied to the lungs of animals are made from experimental dosimetry data. TPM dose levels achieved in a number of species following exposure to smoke are related to body weight, lung weight and alveolar surface areas of these animals. The dosage levels achieved in animals are compared with estimate of TPM(More)
—Control of molten steel delivery through the pouring nozzle is critical to ensure an optimum laminar flow pattern in continuous casting, which influences the surface quality, cleanliness , and hence the value of the cast product. A nonintrusive and nonhazardous visualization technique, which uses rugged and noninvasive sensors, would be highly desirable in(More)