نتایج جستجو برای: generations mean analysis
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The factors most often cited as the causes of the California crisis are the scarcity of generation capacity, a flawed market design, and the venality of electricity producers. However, many of these attributes were present in other electricity markets, none of which have suffered through anything like the California crisis. The only factor not seen in other markets in the world is the lack of c...
A cross-temporal meta-analysis found that narcissism levels have risen over the generations in 85 samples of American college students who completed the 40-item forced-choice Narcissistic Personality Inventory (NPI) between 1979 and 2006 (total n=16,475). Mean narcissism scores were significantly correlated with year of data collection when weighted by sample size (beta=.53, p<.001). Since 1982...
What is the true rate of social mobility? Modern one-generation studies suggest considerable regression to the mean for all measures of status – wealth, income, occupation and education across a variety of societies. The β that links status across generations is in the order of 0.2-0.5. In that case inherited surnames will quickly lose any information about social status. Using surnames this pa...
the objective of the present study was to evaluate the genetic structure and diversity of 16 generations of native fowls of west azerbaijan province, iran using the pedigree data collected between 1994 and 2012. inbreeding coefficient (f), pedigree completeness index (pci), parameters of the probability of gene origin and other parameters related to the genetic structure were estimated using th...
The purposes of this study are (1) to make scales of relationships between grandchildren in adolescence and grandparents, and (2) to clarify functions of grandparents perceived by grandchildren and functions of grandchildren perceived by grandparents. Subjects were 517 students in junior high schools, high schools and universities (mean of age: 17 years old), and 107 elderly persons at home (me...
OBJECTIVE Previous experiments showed that caffeine blocks the development of Aedes aegypti (Diptera, Culicidae) in the larval stage, consequently inhibiting the production of adults. This study aimed at obtaining data suggestive of caffeine resistance by these mosquitoes. METHODS Experiments were carried out in successive generations to assess adult production from eggs laid in previous gene...
An age-cohort decomposition applied to panel data identifies how the mean, overall inequality and income-related inequality of self-assessed health evolve over the life cycle and differ across generations in 11 EU countries. There is a moderate and steady decline in mean health until the age of 70 or so and a steep acceleration in the rate of deterioration thereafter. In southern Europe and Ire...
A strain of mice (S1) was successfully selected for large litter size for 31 generations, increasing the mean by 4.2 young per litter. After generation 31, there was no further progress and it was concluded that a selection plateau had been reached. Realized heritability decreased during the course of the experiment from 0.16+/-0.06 for the first 15 generations to 0.00+/-0.03 for generations 30...
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