نتایج جستجو برای: river spacing

تعداد نتایج: 105005  

2001
W. Kern Dieter Sperling

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ژورنال: علوم زمین 2015
بهروز آریافر بهمن سلیمانی حسین اصیلیان مهابادی داریوش باغبانی سید علی آقانباتی محمد جودکی

برای مطالعه زیست‎چینه‎نگاری و تعیین روابط میان زیست‎زون‎های تفکیک شده نهشته‎های الیگوسن ومیوسن زیرین در حوضه‎های پیش‎بوم و کمربند چین خورده و راندگی زاگرس ، 10 مقطع چینه‎شناسی (شامل 7 مقطع زیرسطحی و 3 مقطع سطحی) در امتداد یک برش ناحیه‎ای از چاه A در خلیج فارس تا برش سمیرم در زاگرس مرتفع مورد بررسی قرار گرفته است. مطالعه بیش از 1500 مقطع نازک از برش های یادشده سبب شناسایی 32 جنس و 54 گونه از روز...

Journal: :Journal of experimental psychology. Learning, memory, and cognition 2010
Lisa K Son

This study investigates whether the use of a spacing strategy absolutely improves final performance, even when the learner had chosen, metacognitively, to mass. After making judgments of learning, adult and child participants chose to mass or space their study of word pairs. However, 1/3 of their choices were dishonored. That is, they were forced to mass after having chosen to space and forced ...

Journal: :Population studies 2006
Alicia Adsera

Since the transition to democracy in Spain in 1975, both total fertility and rates of church attendance of Catholics have dropped dramatically. In this study the 1985 and 1999 Spanish Fertility Surveys were used to investigate whether the significance of religion for fertility behaviour -- current family size and the spacing of births -- changed between the survey dates. In the 1985 survey, fam...

Journal: :Applied optics 2006
Ling Qing Wu Gang Liu Bin Wang Qiuping

Uniform line spacing plane gratings are introduced into a recording system to generate aspherical wavefronts for recording varied line spacing plane holographic gratings. Analytical expressions of groove parameters are derived to the fourth order. A ray-tracing validation algorithm is provided based on Fermat's principle and a local search method. The recording parameters are optimized to recor...

Journal: :Magnetic resonance in medicine 2007
Krishna S Nayak Hsu-Lei Lee Brian A Hargreaves Bob S Hu

Balanced steady-state free precession (SSFP) imaging is limited by off-resonance banding artifacts, which occur with periodicity 1/TR in the frequency spectrum. A novel balanced SSFP technique for widening the band spacing in the frequency response is described. This method, called wideband SSFP, utilizes two alternating repetition times with alternating RF phase, and maintains high SNR and T(2...

Journal: :Ecological applications : a publication of the Ecological Society of America 2012
Shane A Blowes Sean R Connolly

Two important processes determining the dynamics of spatially structured populations are dispersal and the spatial covariance of demographic fluctuations. Spatially explicit approaches to conservation, such as reserve networks, must consider the tension between these two processes and reach a balance between distances near enough to maintain connectivity, but far enough to benefit from risk spr...

Journal: :Journal of vision 2011
Fabien Vinckier Emilie Qiao Christophe Pallier Stanislas Dehaene Laurent Cohen

Identifying letters and their relative positions is the basis of reading in literate adults. The Local Combinations Detector model hypothesizes that this ability results from the general organization of the visual system, whereby object encoding proceeds through a hierarchy of neural detectors that, in the case of reading, would be tuned to letters, bigrams, or other letter combinations. Given ...

2008
Michael J. Kahana Robert L. Greene Robert Crowder David Elmes Arthur Glen

The spacing effect refers to the advantage in memory for information repeated at separate points of time over information repeated in massed fashion. Three experiments showed that no spacing effect was found in free recall of lists containing items of high interstimulus semantic similarity. However, spacing effects were found when recognition or frequency-discrimination tests were given on thes...

Journal: :Ecology 2009
Eric P Palkovacs David M Post

Studies of adaptive divergence have traditionally focused on the ecological causes of trait diversification, while the ecological consequences of phenotypic divergence remain relatively unexplored. Divergence in predator foraging traits, in particular, has the potential to impact the structure and dynamics of ecological communities. To examine the effects of predator trait divergence on prey co...

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