منابع مشابه
a study on rate making and required reserves determination in reinsurance market: a simulation
reinsurance is widely recognized as an important instrument in the capital management of an insurance company as well as its risk management tool. this thesis is intended to determine premium rates for different types of reinsurance policies. also, given the fact that the reinsurance coverage of every company depends upon its reserves, so different types of reserves and the method of their calc...
Sex Determination: Sex on the Brain?
Five newly identified sex-biased transcripts in Drosophila are full of surprises: although they are found in fly heads, and manipulating two of them affects mating behaviors, their genes are expressed sex-specifically in non-neural tissues. The way these genes are regulated suggests new complexities in the sex determination pathway.
متن کاملA note on 'A generalized two-sex logistic model'.
We re-visit the recently published paper on a generalization of the two-sex logistic model by Maxin and Sega [A generalized two-sex logistic model, J. Biol. Dyn. 7(1) (2013), pp. 302-318]. We show that the logistic assumption of a non-increasing birth rate can be replaced by a more general assumption of a non-increasing ratio between the female/male birth and mortality rate. In this note we ind...
متن کاملA note on the sex ratio in anencephalus.
While exploring the association of the sex ratio of stillbirths with cause and duration of gestation, McKeown and Lowe (1951) noted that for anencephalus sex ratio increased with duration of gestation. No explanation was offered for this observation, which is here considered briefly. In Birmingham, during the years 1940-51, 454 stillbirths and 28 infant deaths were attributed to anencephalus (4...
متن کاملA note on the sex distribution of sibs.
It is remarkable that little attention has been given to the variation of the sex distribution of birth in the accountancy of housing policy in the present context of low fertility. When families are large, gross discrepancies between the number of girls and boys in a sibship will be rare; and the problem of providing separate accommodation for the sexes does not commonly assume a formidable as...
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ژورنال
عنوان ژورنال: Science
سال: 1914
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.39.997.215