نتایج جستجو برای: population inversion

تعداد نتایج: 736537  

2007
Erik Corona Benjamin J. Raphael Eleazar Eskin

Numerous efforts are underway to catalog genetic variation in human populations. While the majority of studies of genetic variation have focused on single base pair differences between individuals, i.e. single nucleotide polymorphisms (SNPs), several recent studies have demonstrated that larger scale structural variation including copy number polymorphisms and inversion polymorphisms are also c...

Journal: :American Journal of Modern Physics 2018

Journal: :Journal of Physics: Condensed Matter 2015

Journal: :Optics express 2015
Wen-Xing Yang Ai-Xi Chen Ziwen Huang Ray-Kuang Lee

We study ultrafast excitonic population inversion resulting from the interaction of a semiconductor quantum dot (SQD) with localized surface plasmons. The plasmonic enhanced fields are generated when a metallic nanoparticle (MNP) is subject to a nonlinear chirped few-cycle pulse train. By numerically solving the time-dependent Bloch equations beyond the rotating-wave approximation, we show that...

2005
Anna M. Michalak Adam Hirsch Lori Bruhwiler Kevin R. Gurney Wouter Peters Pieter P. Tans

[1] This paper introduces a Maximum Likelihood (ML) approach for estimating the statistical parameters required for the covariance matrices used in the solution of Bayesian inverse problems aimed at estimating surface fluxes of atmospheric trace gases. The method offers an objective methodology for populating the covariance matrices required in Bayesian inversions, thereby resulting in better e...

2011
S. G. Suguna S. C. Tewari T. R. Mani J. Hiriyan

Cytogenetic observations on an extensive material of the Anopheles culicifacies complex from the Thenpennai river area, Tamil N adu, South India show that the populations are made up of four cytologically distinct species. Three of these, labeled A, B and C have already been described. A fourth .one, monomorphic for the inversion arrangement + a + b in the X chromosome and il + hI in the second...

2008
Shelly Sharma N. K. Sharma Larry Zamick

We study the population inversion and Q-function of a two-level atom, interacting with single-mode laser light field, in a q-analog harmonic oscillator trap for increasing q. For τ = .003(q = e ) the collapses and revivals of popu∗email:[email protected] 1 lation inversion become well defined facilitating experimental observation but for large τ ∼ 0.1 the time dependence of populatio...

2007
Tiago H. Degrandi Daniela C. De Toni Vera L. S. Valente

A first case of polymorphism of a pericentric inversion on X-chromosome was detected in six wild populations of Drosophila willistoni from islands and the mainland of Santa Catarina State, southern Brazil. The high representativeness of this inversion, with frequencies between 10 to 42 % in samples of wild populations from Santa Catarina State, suggests that it could be adaptive and that the es...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید