the conventional tunneling procedures for example drilling, charging, blasting, loading and supporting, are highly developed. new tunneling machines have recently come into operation and others are under construction or development. impactors are used in large numbers in the coal mining industry. face-heading machines are successfully used in new tunneling procedures in both soft and medium-har...

Introduction. Adolescent use of indoor tanning facilities is associated with an increased risk in later development of melanoma skin cancers. States that have imposed age restrictions on access to indoor tanning generally show lower self-reported rates of indoor tanning than states with no restrictions, but currently no studies have assessed indoor tanning use before and after such restrictions...

_____..._._______._ Introduction. _________________ Basic concepts......______________ The population_____._____._ Restrictions due to limited access. Other basic concepts. ___....__ Mathematical models and sampling error. Face

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A competitive market for individual health insurance tends to risk-adjusted premiums. Premium rate restrictions are often considered a tool to increase access to coverage for high-risk individuals in such a market. However, such regulation induces selection which may have several adverse effects. As an alternative approach we consider risk-adjusted premium subsidies. Empirical results of simula...

introduction: the perceived lean services are definite type of the therapy services that patients’ needs are responded based on information about how to receive services in hospitals and medical centers. the present study aimed to determine the relationship between availability of patients’ therapy information management infrastructures and perceived lean services to find suitable model. method...