Do we observe ultra high energy cosmic rays above the Greisen-Zatsepin-Kuzmin cutoff due to violation of Lorentz invariance? Abstract Violation of Lorentz invariance has been suggested by Coleman and Glashow as a possible explanation of observing ultra high energy cosmic ray events above the Greisen Zatsepin Kuzmin cutoff. Earlier some of the ultra high energy cosmic ray events have been correl...

the wide availability of data on air pollutant emissions, the knowledge already achieved on theset of chemical and photochemical reactions in the troposphere, the ability to access real time weatherconditions at the local scale that determine the transport and transformation of gases and aerosol, now make it possible to obtain credible and reliable predictions, retrospective analyses and/or fut...

Cloud computing is providing IT services to its customer based on Service level agreements (SLAs). It important for cloud service providers provide reliable Quality of (QoS) and maintain SLAs accountability. need predict possible violations before the emergence an issue perform remedial actions it. users’ major concerns; factors reliability are response time, accessibility, availability, speed....

Modern studies in the field of environment science and engineering show that deterministic models struggle to capture the relationship between the concentration of atmospheric pollutants and their emission sources. The recent advances in statistical modeling based on machine learning approaches have emerged as solution to tackle these issues. It is a fact that, input variable type largely affec...

1. introduction: increasing urbanization and industrialization rate in developed and developing countries cities, such as tehran, has led to increased air pollution. todays, the prediction and estimation of air quality parameters in urban regions are important topics in environmental studies due to their effect on human health. measurement of air quality are widely used in air quality control p...