Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “Estimation Technics”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 523 records · Page 29Linked to original sources
PubMed1977

[Protein assay by immunoprecipitation with Centrifichem centrifugal analyser].

The authors present an automatic technic of estimation of ten serum proteins (albumin, alpha-antitrypsin, orosomucoid, alpha-1-macroglobulin, haptoglobin, C'3 complement, transferrin, IgM, IgG, IgA) by immunoopacimetry on a Centrifichem centrifugal analyser. This technic is derived from an immunonephelometric method, with the following differences: --the use of two concentrations of polyethylene glycol permitting one to obtain for all proteins, a constant levelling-out of the reaction within 3 minutes; --by a first reading at 3 seconds avoiding the prior determination of blank reagents and sera; --by the use of two dilutions of serum permitting calculation of all concentrations. The results are reproducible and are satisfactory: 95% of the coefficients of variation are less than +/- 5% in the case of all the proteins. The correlation with IDR is good. The coefficients vary from 0.91 to 0.99.

Autoanalysis↗
PubMed1987

Forecasting the reorganization of the settlement pattern in a region of formation of a territorial-production complex.

The author investigates the formation and development of territorial-production complexes (TPCs) in the USSR. "The main issue in preliminary studies for a TPC is to determine the long-term industrial and territorial structure of the TPC, as well as to set the sequence of priorities for the construction and start-up of plants in specialized sectors complementing and serving the various industries making up the TPC. Forecasts [must be] made for the size of the population and the dimensions of the industrial and social infrastructure subserving the industrial units in the TPC to be expected by the end of a specified period of time. Our purpose is to determine the dynamics of the above-enumerated elements of the system, as well as the main population growth parameters of all cities and rural areas in a specified region."

Demography↗
PubMed1983

[The natural increase of the Catholic population of Quebec before 1850: historiographic and quantitative perspectives].

"The author presents a critical evaluation of the different estimates of birth, death, and marriage rates in French Canada before 1850. He examines critically the sensitivity of these estimates to changes in the nature of the prevailing conceptual framework. In particular, the impact of the 'natalist' tradition and of the 'demographic transition hypothesis' on these estimates is noted." (summary in ENG)

Americas↗
PubMedDate not supplied

[Prehistoric population studies].

Studies concerning prehistoric populations in the Americas are discussed. "A review is made of research conducted in America focusing...on indigenous populations prior to contacts with Europeans, and those which, employing archaeological and historical sources, seek to evaluate the population and establish depopulation indexes for the said societies." (SUMMARY IN ENG)

Americas↗
PubMed1992

Asymptotic worst-case mixing in simple demographic models of HIV/AIDS.

The majority of published modeling work regarding the impact of mixing patterns among subgroups on the spread of HIV infection assumes either that the overall population size remains constant, the aggregate immigration to the population occurs at a constant annual rate, or that no immigration occurs and the population in question declines due to HIV or other causes. In this paper, immigration rates are modeled as simple functions of population size and may be interpreted as aggregate birth rates. This assumption implies asymptotic exponential growth in the disease-free population as long as per capita birth rates exceed per capita mortality rates. The introduction of HIV infection to such a population may change this situation, and the asymptotic population growth rate can be reduced substantially as a result. The specific manner in which this occurs depends in part upon difficult to observe mixing patterns among those with different sexual activity rates. Rather than attempting to explicitly model a variety of mixing patterns, a bound on the impact of worst-case mixing is produced, where "worst case" refers to the mixing pattern that maximizes the asymptotic prevalence of infection, which is equivalent to minimizing the asymptotic population growth rate. These new techniques are illustrated with a numerical example.

Acquired Immunodeficiency Syndrome↗