Lumber grade recovery in a circular-saw mill in California

Scientific Research in the Saw-Mill Industry

A comparative study of lung functions in rice mill and saw mill workers.

A lung function study was carried out to determine the relative effect of rice husk and saw dust on mill workers. The study consisted of 195 subjects of which 56 rice mill workers, 71 saw mill workers and 68 controls of similar age, sex and socio-economic condition. FVC was significantly reduced in saw-mill workers compared to both the controls and rice mill workers. Both FEV1 and PEFR/min were...

Cutting Out Polygons with a Circular Saw

Given a simple (cuttable) polygon Q drawn on a piece of planar material R, we cut Q out of R by a (small) circular saw with a total number of cuts no more than twice the optimal. This improves the previous approximation ratio of 2.5 obtained by Demaine et al. in 2001.

Polygons Cuttable by a Circular Saw

We introduce and characterize a new class of polygons that models wood, stone, glass, and ceramic shapes that can be cut with a table saw, lapidary trim saw, or other circular saw. In this model, a circular saw is a line segment (in projection) that can move freely in empty space, but can only cut straight into a portion of material. Once a region of material is separated from the rest, it can ...

Pulmonary function tests in saw mill factory workers.

The prevalence of pneumoconiosis varies from 15–30% in various parts of India (1). Occupational asthma may account for about 10% of adult asthma (2). Asthma associated with work is being recognized with increased f requency in carpenters , saw mi l l workers and furn i tu re makers . The cause for occupa t iona l as thma i s wood/saw dus t . Ear l ie r s tud ies have documented increased incide...