introduction: occupational exposure to excessive noise is commonly encountered in a large number of industries in iran. this study evaluated the hearing threshold and hearing loss in meybod tile factory workers. methods: this cross-sectional study included 371 tile factoryworkers during summer and autumn of 2005. current noise exposure was estimated using sound level meter .a specially formatte...

  Background & Aims of the Study: Dust is one of the detrimental factors in workplace of tile industry. Exposure to excessive amount of dust can create various hazards to the workers. Therefore, the present study aimed to measure the concentration of environmental and respirable dust in air of Birjand Niloofar tile Industry. Materials & Methods: In the present study, using personal...

Tile responses of artificial neural networks to experimental and model generated inputs are compared for detection of damage in twisted fan blades using electronic holography. Tile training set inputs, for this work, are experimentally generated cllaracteristic pattenls of tile vibrating blades. Tile outputs are damage flag indicators or second derivatives of tile sensitivity vector projected d...

Buyer cooperatives, buyer alliances, and horizontal mergers are often perceived as attempts to increase buyer power. While prior theoretical and empirical work has emphasized that buyer size can increase buyer surplus, I show that even a small group of buyers with heterogeneous preferences can increase price competition among rival sellers by forming a buyer group and committing to buy exclusiv...

We show that the Tile Assembly Model exhibits a strong notion of universality where the goal is to give a single tile assembly system that simulates the behavior of any other tile assembly system. We give a tile assembly system that is capable of simulating a very wide class of tile systems, including itself. Specifically, we give a tile set that simulates the assembly of any tile assembly syst...

background: respiratory diseases cause a considerable amount of morbidity and mortality in the world. pulmonary function tests are important measures for the diagnosis and management of respiratory disorders. workers in tile and ceramic industry are exposed to high amounts of respiratory pollutants. objective: to identify the changes in spirometric parameters in a 2-year period among tile and c...

While the theoretical implications of models of DNA tile self-assembly have been extensively researched and such models have been used to design DNA tile systems for use in experiments, there has been little research testing the fundamental assumptions of those models. In this paper, we use direct observation of individual tile attachments and detachments of two DNA tile systems on a mica surfa...