BASEL, Switzerland, Sept. 23 -- The International Journal of Environmental Research and Public Health, a peer-reviewed scientific journal from the International Society Doctors for the Environment and the Italian Society of Environmental Medicine that says it focuses on environmental health sciences and public health, published research articles on the following topics in its Vol. 19, No. 19 edition: Articles: * HMM-Based Action Recognition System for Elderly Healthcare by Colorizing Depth Ma more PR