To optimize combustion efficiency, the structural characteristics of the zoned and staged double P-type gas-fired radiant tube were improved.The corresponding experimental and numerical studies were performed here on the new radiant tube and the results show that deviations in the monitoring parameters are less than 1%, except for a NOx concentrati

Abstract Background Recreational use of prescription drugs is widespread.We describe acute poisonings related to the recreational use of prescription drugs.Methods Retrospective observational study.We retrospectively registered all patients presenting from October 2013 through March 2015 at a primary care emergency outpatient clinic in Oslo, Norway

This article discusses the concept of a customer as an asset of business in the accommodation industry.The purpose of this article is to examine the value of guests as a firm asset and to propose a model for managing guests as an asset in the context of accommodation services.A guest is considered an asset due to its role in providing revenue to th