نتایج جستجو برای: phenotypic trend
تعداد نتایج: 181942 فیلتر نتایج به سال:
THEWORK OF DIVERSITY IN LIBRARIES BEGINS at the crossroad where superiority, inaction, and denial become intolerable. Yet in working toward true diversity, we work without the familiar construct of a mainstream. We respond to, or ignore, repetitive critique of being too exclusive or not inclusive enough. We decide whether it is appropriate to quantify the existence of a people or to trust what ...
The problem of estimating underlying trends in time series data arises in a variety of disciplines. In this paper we propose a variation on Hodrick-Prescott (H-P) filtering, a widely used method for trend estimation. The proposed l1 trend filtering method substitutes a sum of absolute values (i.e., an l1-norm) for the sum of squares used in H-P filtering to penalize variations in the estimated ...
The study traces the likely route of the movement of fertility through the demographic transition. The information is critical for construction of population projections as well as for monitoring and evaluating action programmes The original P/F ratio method and modified versions, one through the intermediary of relational Gompertz model , for analysing birth history data, are employed in asses...
A model with leisure production and endogenous retirement is used to explain the declining labor force participation rates of elderly males. The model is calibrated to cross-sectional data on the labor force participation rates of elderly US males by age, their median drop in market consumption and leisure good expenditure share in the year 2000. Running the calibrated model for the period 1850...
One morphological variant of chromosome 1 in man differs from the more usual form of this chromosome in being longer and more submetacentric. This is due to increased length of the long arm and because there is apposition of chromatids in the paracentromeric region of the long arm (q). This variant, or similar appearing variants ofchromosome 1, have been found in 1 per 100 to 1 per 1000 newborn...
Nanotechnology has had a great impact on science, technology, and society since 2000, and its applications in medicine are also progressing in the diagnosis, treatment, and prevention of disease. In this review, international trends in nanomedicine regulation are introduced, including the definition of nanomedicines and the evaluation of liposomes and iron nanoparticles.
Collocation is a popular method in geodesy for combining heterogeneous data of different kind. It comprises adjustment, interpolation and extrapolation as special cases. Current methods of collocation apply however only if the trend parameters are real valued. In the present contribution we will generalize the theory of collocation by permitting the trend parameters to be integer valued. It wil...
Abstract Intraspecific morphological variation may reflect phenotypic plasticity or adaptive divergence. While shape divergence occur more likely among isolated populations with reduced gene flow, responses to heterogeneous environments, even in spatially connected populations. We evaluated both processes while examining variations seven wild of snakehead fish ( Parachanna obscura ) along clima...
As the number of resources on the web exceeds by far the number of documents one can track, it becomes increasingly difficult to remain up to date on ones own areas of interest. The problem becomes more severe with the increasing fraction of multimedia data, from which it is difficult to extract some conceptual description of their contents. One way to overcome this problem are social bookmark ...
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