نتایج جستجو برای: weisberg
تعداد نتایج: 213 فیلتر نتایج به سال:
Age of <i>Eucalyptus</i> plantations differentially affects assemblages of surface‐active arthropods
Microhabitats and environmental conditions in eucalypts vary depending on the growth phase. Response of surface-active arthropods to eucalypt phases is unclear; yet, it can be an important contribution forest management. Thus, we investigated response three age groups. We collected a 7-month-old, 18-month-old, 53-month-old since planting. Eucalyptus did not affect species richness. However, ass...
Chondrule textures depend on the extent of melting of the chondrule precursor material when cooling starts. If viable nuclei remain in the melt, crystallization begins immediately, producing crystals with shapes that approach equilibrium. If not, crystallization does not occur until the melt is supersaturated, resulting in more rapid growth rates and the formation of skeletal or dendritic cryst...
In 2009, TNTP’s The Widget Effect documented the failure to recognize and act on differences in teacher effectiveness. We revisit these findings by compiling teacher performance ratings across 24 states that adopted major reforms to their teacher evaluation systems. In the vast majority of these states, the percentage of teachers rated Unsatisfactory remains less than 1%. However, the full dist...
Six previous studies of the variables affecting anagram solution are reexamined for the evidence that number of syllables contributes to solution difficulty. It was shown that the number of syllables in a solution word was confounded with imagery for one study and with digram frequency for another. More importantly it was shown that the number of syllables has a large effect on anagram solution...
Research Findings: Evolution by natural selection is often relegated to the high school curriculum on the assumption that younger students cannot grasp its complexity. We sought to test that assumption by teaching children ages 4–12 (n = 96) a selection-based explanation for biological adaptation and comparing their success to that of adults (n = 30). Participants provided explanations before a...
Four experiments investigated transformation problems with insight characteristics. Experiment 1 examined two versions of the six-coin problem with different solution properties. Performance on one version with a concrete and visualizable solution followed predictions derived from assuming a hill-climbing heuristic. The determinant of performance on the second version, in which the solution pot...
Reliable fish condition estimates help managers better understand ecosystem population dynamics. Therefore, our study objectives were to measure seasonal changes in percent dry weight and energy density (physiological-based measures of condition) of stream-dwelling Appalachian Brook Trout Salvelinus fontinalis, field-validate bioelectrical impedance analysis (BIA) models, and compare reliabilit...
Transcript elongation and termination in Escherichia coli is modulated, in part, by the nusA gene product, an acidic protein that interacts not only with RNA polymerase itself but also with ancillary factors, namely the host termination protein Rho and phage X antitermination protein, N. The E. coli nusAl mutant fails to support X development due to a specific defect in N-mediated antiterminati...
Moose (Alces alces [L]) droppings were sampled in June-August, 2007, in Isle Royale National Park, a remote wilderness island in Lake Superior, to characterize biodiversity of the park’s moose dung fauna. Twelve Diptera and nine Coleoptera species were obtained, for a total of 21 insect taxa. Twenty of the taxa are newly recorded colonists or visitors to moose dung. The Diptera were Psychodidae...
Coastal margins are of enormous economic, environmental, and societal value. However, coastal margin growth, land-use practices, and deleterious anthropogenic and natural processes impact overall coastal margin health. Events such as storms, accidental oil spills, and harmful algal blooms lead to increased water column particle suspension and ecological degradation. An anthropogenic oil spill s...
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