]Komogeneous wave guide theory is used to derive dispersion curves, vertical pressure distributions, and synthetic baregrams for atmospheric waves. A complicated mode structure is found involving both gravity and acoustic waves. Various models of the atmosphere are studied to explore seasonal and geographic effects on pulse propagation. The influence of different zones in the atmosphere on the ...

With sound level meters the measurement uncertainty is fixed and transparent, depending on the class of the instrument. The counterpart of the measurement, the noise simulation, has many more uncertainties. The uncertainties stem from the calculation standard used, the application of the model’s theoretical basis in a computer program and the construction of the data model. The uncertainty of t...

Editorial In both recent and forthcoming issues of EHP, an increasing number of papers and news articles feature applications of statistical and mathematical modeling in environmental health. My comments focus on applications of mathematical models, which have become increasingly popular as tools for organizing and conducting the analysis of complex problems, partially because of easy access to...

The purpose of this research is to examine the role of information technology (IT) in the adoption of human resources (HR) and environmental management activities, a research topic that has not received much attention in prior literature. Drawing on the theory of operational and dynamic capabilities, we propose a model in which IT infrastructure leveraging enables the firm to create value from ...

The role of human resource management in learning organizations has been discussed by a number of researchers. It is suggested that some of the more traditional personnel functions of HR practitioners may be tailored to encourage a focus on learning and thus to help achieve organizational goals. However, there is a lack of empirical studies that explore the relationship between human resource m...

Recent works about the activity-oriented approach et educational modeling languages ask questions about the pedagogical scenario concept. The aim of this paper is to define the foundations of a new engineering approach based on scenarios. We propose a conceptual framework, a precise vocabulary and a taxonomy of scenarios, and we focus on relationships between activities and resources. We also g...

We analyze the effects of free trade on environmental policies in a strategic setting with transboundary pollution. Trade liberalization can result in a race to the bottom in environmental outcomes, making both countries worse off. With command and control policies (quotas), there is no race to the bottom. However, with internationally tradable permits, unless pollution is a pure global public ...

in today's dynamic and uncertain environment, knowledge is a strategic source for organizations to gain the competitive advantage and innovation. in this research, we have investigated mediating role of knowledge management between environmental uncertainty and organizational innovation. data was collected through questionnaire from 89 large and medium sized manufacturing companies in suburb ma...