نتایج جستجو برای: strata control
تعداد نتایج: 1337218 فیلتر نتایج به سال:
OBJECTIVES To evaluate the effectiveness of educational counselling programmes aimed at increasing parents' practice of childhood safety in Monterrey, Mexico, and to provide information aimed at helping to improve the effectiveness of future efforts in this field. METHODS Three different counselling programmes were designed to meet the needs of the upper, middle and lower socioeconomic strata...
In 1991, the National Marine Fisheries Service, as mandated by the U.S. Driftnet Impact Monitoring,. Assessment, and Control Act of 1987 and U.S. Public Law 101-627, developed methods to estimate the incidental catches (bycatch) of salmonids in the North Pacific squid driftnet fisheries of Japan, the Republic of Korea (ROK), and Taiwan. Two analytical approaches were used for the Japanese fishe...
Investigators often meta-analyze multiple genome-wide association studies (GWASs) to increase the power to detect associations of single nucleotide polymorphisms (SNPs) with a trait. Meta-analysis is also performed within a single cohort that is stratified by, e.g., sex or ancestry group. Having correlated individuals among the strata may complicate meta-analyses, limit power, and inflate Type ...
OBJECTIVE To estimate the vaccination coverage in children born in the city of Salvador, analyzing these coverages by socioeconomic conditions. METHOD A household survey on vaccination coverage was conducted with children born in 2005, in Salvador, Bahia, northeastern Brazil, who were aged between 18 to 36 months at the time of this study. Cluster sampling was performed in multiple stages. Ce...
The almond bark beetle, Scolytus amygdali Geurin-Meneville, is responsible for significant loss of fruit production in almond orchards throughout the world. Here, we studied the damage and the incidences of S. amygdali attack on two different scales: (1) at the level of a single tree; and (2) in an entire orchard. Our results revealed no differences in attack level among four orientations (east...
some researches made in the field of agency problem issue, deal with the role of control systems regarding owners and managers. in this research the relationship between the two control mechanisms, namely the voluntary disclosure (external control mechanism) and outside directors (internal control mechanism), which are reductive of agency problems, has been studied. for this reason, a sample ...
We describe an entanglement witness for N -qubit mixed states based on the properties of N -point correlation functions. As the degree of violation increases beyond different threshold values, or strata, this witness can guarantee that no more than M qubits are separable from the rest of the state for any M 6 N , or that there is some genuine M-party or greater multipartite entanglement present...
1. Let Zk~ be the manifold of all nondegenerate complex k × n-matrices, k < n , let Gkn be the Grassmannian of k-dimensional subspaces in C~', and let ~r: Zkn -~ Gk, be the na tura l projection (7~(z) for z E Zk~ is the k-dimensional subspace of C ~ generated by the rows of z). For a matr ix z E Zkn denote by px(z) = pil...ik(z) the minor of z composed by the columns with indices from the set I...
This paper deals with a question of Fontaine and Rapoport which was posed in [FR]. There they asked for the determination of the index set of the Harder-Narasimhan vectors of the filtered isocrystals with fixed Newtonand Hodge vector. The aim of this paper is to give an answer to their question.
Mammalian sex chromosomes arose from a pair of homologous autosomes that differentiated into the X and Y chromosomes following a series of recombination suppression events between the X and Y. The stepwise recombination suppressions from the distal long arm to the distal short arm of the chromosomes are reflected as regions with distinct X-Y divergence, referred to as evolutionary strata on the...
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