Formal semantic treatments of nominal reference have focused on natural kind nouns (Carlson 1980, Krifka et al. 1995), yet as has been widely recognized by anthropologists, cognitive scientists, philosophers, and others, artifacts (cup, furniture, chair) and natural kinds (dog, water, flower) differ critically in nature. We argue that these differences have important consequences for how artifa...

BACKGROUND Wood furniture manufacturing factory workers are at high risk of exposure to wood dust in wood working processes. Wood dust exposure could cause respiratory symptoms, such as reduce lung function, chronic bronchitis, and asthma. The Northeast region of Thailand has many wood furniture manufacturing factories. However, limited studies were carried out to explore the effect of wood dus...