Mortality dynamics are characterized by changes in mortality regimes. This paper describes a Markov regime switching model which incorporates mortality state switches into mortality dynamics. Using the 1901-2005 US population mortality data, we illustrate that regime switching models can perform better than well-known models in the literature. Furthermore, we extend the Lee-Carter (1992) model ...

Restricted water resources are a limiting factor for irrigation applications throughout the world. The effects of irrigation regimes (amount) on cotton lint yield are known, but there is little information on the effect of irrigation regimes on seed quality of cotton. In this study, the effects of deficit irrigation after the onset of flowering on lint yield and seed quality of cotton (Gossypiu...

Background: The exposure of cell lines to low-dose irradiation leads to changes at molecular level, which may induce adaptive response. We examined radio-adaptive doses effect on human colorectal adenocarcinoma cell line (HT29) and human fetal fibroblasts (MRC5) cell line followed by hyper and hypo fractionation regimes, with main purpose to decrease cell viability in HT29, and at the same time...

Temperature is one of the most important climate variables that many economic and social plans related to its changes. Because of The importance of this issue, this study investigated the changes of it in the province Khuzestan. Meteorological data that used in this study is mean temperature in annual and seasonal timescale. The study area is Abadan, Ahwaz, Dezful and Omidiye stations. For anal...

Topics covered: 1. What is disturbance? 2. Characteristics of disturbances and disturbance regimes 3. Role of disturbance in ecosystems and landscapes 4. Factors affecting disturbances 5. Feedback mechanisms affecting disturbance regimes 6. Interactions among the physical template, biotic processes and disturbance regimes 7. Human effects on disturbance regimes 8. Resource management implications.

Topics covered: 1. What is disturbance? 2. Characteristics of disturbances and disturbance regimes 3. Role of disturbance in ecosystems and landscapes 4. Factors affecting disturbances 5. Feedback mechanisms affecting disturbance regimes 6. Interactions among the physical template, biotic processes and disturbance regimes 7. Human effects on disturbance regimes 8. Resource management implications.