Assessment of respirable dust, personal exposures of miners and free silica contents in dust were undertaken to find out the associated risk of coal workers' pneumoconiosis in 9 coal mines of Eastern India during 1988-91. Mine Research Establishment (MRE), 113A Gravimetric Dust Sampler (GDS) and personal samplers (AFC 123), Cassella, London, approved by Director General of Mines Safety (DGMS) w...

LEDERBERG, J. 1950 Isolation and characterization of biochemical mutants of bacteria. Methods in Med. Research, 3, 5-22. NEWCOMBE, H. B. 1953 The delayed appearance of radiationinduced genetic change in bacteria. Genetics, 38, 134151. NEWCOMBE, H. B. 1955 Mechanisms of mutation production in microorganisms. In BACQ, Z. M., AND ALEXANDER, P. Radiobiol. Symposium, Proc. Li6ge, 1954. PONTECORVO, G...

In this paper, we propose a methodology to sample sequentially from a sequence of probability distributions known up to a normalizing constant and defined on a common space. These probability distributions are approximated by a cloud of weighted random samples which are propagated over time using Sequential Monte Carlo methods. This methodology allows us to derive simple algorithms to make para...

RETTGER, L. F. 1910 A new and improved method of enumerating air bacteria. J. Med. Research, 22, 461-468. ROSEBURY, T. 1947 Experimental air-borne infection. In Microbiological Monographs. The Williams & Wilkins Co., Baltimore, Maryland. SHIPE, E. L., TYLER, M. E., AND CHAPMAN, D. M. 1959 Bacterial aerosol samplers. II. Development and evaluation of the Shipe sampler. Appl. Microbiol., 7, 349-3...

We consider various versions of adaptive Gibbs and Metropoliswithin-Gibbs samplers, which update their selection probabilities (and perhaps also their proposal distributions) on the fly during a run, by learning as they go in an attempt to optimise the algorithm. We present a cautionary example of how even a simple-seeming adaptive Gibbs sampler may fail to converge. We then present various pos...

A comparison of Terylene and cotton overalls has been made in the lead-acid electric accumulator industry. Six hand pasters wore personal lead-in-air samplers for two weeks. Three of the men wore cotton overalls the first week and Terylene overalls the second; the other three men wore Terylene overalls the first week and cotton overalls the second. The mean lead-in-air concentration in the brea...

We consider various versions of adaptive Gibbs and Metropoliswithin-Gibbs samplers, which update their selection probabilities (and perhaps also their proposal distributions) on the fly during a run, by learning as they go in an attempt to optimise the algorithm. We present a cautionary example of how even a simple-seeming adaptive Gibbs sampler may fail to converge. We then present various pos...

The incremental health risk for workers of the road-paving sector using rubberized asphalt was assessed based on the outcome of monitoring campaigns carried out during paving operations where both rubberized and standard asphalt were used. The exposure of workers to Polycyclic Aromatic Hydrocarbons (PAHs) released in the asphalt fumes were measured by means of personal samplers and dermal sampl...