converting rangelands to arable land such as dry farming is widely practiced in many places in iran. this activity could possibly contribute to the increase in downstream sedimentation. the effects of this activity on downstream watersheds are not well documented for many strategic areas in the country. one such area which is proposed for this study is the kardeh drainage basin, located in the ...

Introduction Conclusions References

A critical cue for figure-ground assignment in humans is area: smaller regions are more likely to be perceived as figures than are larger regions. To see if pigeons are similarly sensitive to this cue, we trained birds to report whether a target appeared on a colored figure or on a differently colored background. The initial training figure was either smaller than (Experiments 1 and 2) or the s...

Long-range regional projections of the changes in forest type areas are important in public and private forest resources planning. The combination of natural forces and human activities, which are shaped by socioeconomic forces such as population and income trends, has led to striking changes in forest cover types for the three major types of private owners. A model for the U.S. Southeast is pr...

The species-area relationship (SAR) has been used successfully to predict extinction from extent of habitat reduction. These extinction estimates assume that species have uniformly distributed range requirements and a minimum abundance level required for persistence; how many species are lost depends solely on how much habitat is removed, not on where it is removed. We consider another limiting...

1011 NMDA and Sleep-Wakefulness in HCRT-KO Mice—Kostin et al. INTRODUCTION The hypocretins (HCRT-1 and 2), also called orexins, are unique hypothalamic peptides that have been implicated in many physiological functions including sleep-wake regulation.1-4 In the brain, HCRT-expressing neurons are predominantly localized in the perifornical, dorsomedial, and lateral hypothalamic area (PF-LHA).5-8...

Due to its open characteristic, the Web is being posted with vast amount of new information, or Changes continuously. Consequently, at any time, it is conceivable that there will be hot issues (emerging topics) being discussed in any information area on the Web. However, it is not practical for the user to browse the Web manually all the time for the Changes. Thus, we need this Information Area...

Animals can flexibly change their behavior in response to a particular sensory stimulus; the mapping between sensory and motor representations in the brain must therefore be flexible as well. Changes in the correlated firing of pairs of neurons may provide a metric of changes in functional circuitry during behavior. We studied dynamic changes in functional circuitry by analyzing the noise corre...