Using satellite-derived normalized difference vegetation index (NDVI) data, several previous studies have indicated that vegetation growth significantly increased in most areas of China during the period 1982–99. In this letter, we extended the study period to 2010. We found that at the national scale the growing season (April–October) NDVI significantly increased by 0.0007 yr−1 from 1982 to 20...

Remarks prepared for a session on “Recent Changes in Trend and Cycle” at the Structural Change and Monetary Policy Conference hosted by the Stanford Institute for Economic Policy Research and the Federal Reserve Bank of San Francisco, March 3-4, 2000. Financial support from the Stanford Institute for Economic Policy Research, the National Science Foundation (SBR-9818911), and the Sloan Foundati...

Projections of future populations are integral to many planning applications, yet are often poorly understood. This analysis focuses on the implications of the choices planners make when they construct projections. Specifically, it examines the impact of length of base period, analyzes the error structure of projection techniques for counties in the aggregate and by size and growth rates, inves...

An alternative speci¢cation for the trend component of crop yield growth is developed and applied to maize yield data for Zimbabwe's large-scale farming sector. This accounts for permanent regime shifts as new technologies are discovered but allows gradual absorption as adoption follows a di¡usion path. Econometric methods are used to estimate the timing and importance of innovations, as well a...

Currently, the general trend of global fishing industry is to increase production fish food products not only due development aquaculture, but also biological characteristics body sturgeon. The aim study was theoretical justification and practical implementation assessment growth beluga juveniles their hybrids with sterlet aged 0+ 2+ (three-year-olds) in industrial Krasnodar Territory. determin...

To visualise the morphologic changes of a growing spiral pyramid, a mathematical model was developed and implemented in an algorithm that can loop through the sequential time-frames in a growth sequence. The algorithm simulates growth of spiral pyramids with geometries reflecting variation in the step velocity ratio and critical lengths of inequivalent steps. We have developed a new mathematica...

background:growth is one of the most important indices in child health. the best and most effective way to investigate child health is measuring the physical growth indices such as weight, height and head circumference. among these measures, weight growth is the simplest and the most effective way to determine child growth status. weight trend at a given age is the result of cumulative growth e...