Perturbation versus Differentiation Indices

2001 ◽  
pp. 323-337 ◽  
Author(s):  
Marcus Hausdorf ◽  
Werner M. Seiler
Keyword(s):  
Perturbation Versus ◽  
Differentiation Indices

Polymorphism and Differentiation Indices Preferred for Genetic Analysis Among Cattle, Goats, and Sheep

2014 ◽  
Vol 52 (3-4) ◽  
pp. 209-224
Author(s):  
Lanhui Li ◽  
Xianglong Li ◽  
Rongyan Zhou ◽  
Yuhong Ren
Keyword(s):  
Genetic Analysis ◽  
Differentiation Indices

scholarly journals Estimate of surface direct radiative forcing of desert dust from atmospheric modulation of the aerosol optical depth

2013 ◽  
Vol 13 (11) ◽  
pp. 5647-5654 ◽  
Author(s):  
A. di Sarra ◽  
D. Fuà ◽  
D. Meloni
Keyword(s):  
Water Vapour ◽  
Aerosol Optical Depth ◽  
Optical Depth ◽  
Spectral Range ◽  
Radiative Forcing ◽  
Oscillation Amplitude ◽  
Aerosol Layer ◽  
Surface Irradiance ◽  
Perturbation Versus ◽  
Direct Radiative Forcing

Abstract. Measurements carried out on the island of Lampedusa, in the central Mediterranean, on 7 September 2005, show the occurrence of a quasi-periodic oscillation of aerosol optical depth, column water vapour, and surface irradiance in different spectral bands. The oscillation has a period of about 13 min and is attributed to the propagation of a gravity wave able to modify the vertical structure of the planetary boundary layer, as also confirmed by satellite images. The wave occurred during a Saharan dust event. The oscillation amplitude is about 0.1 for the aerosol optical depth, and about 0.4 cm for the column water vapour. The modulation of the downward surface irradiances is in opposition of phase with respect to aerosol optical depth and water vapour column variations. The perturbation of the downward irradiance produced by the aerosols is determined by comparing the measured irradiances with estimated irradiances at a fixed value of the aerosol optical depth, and by correcting for the effect of the water vapour in the shortwave spectral range. The direct radiative forcing efficiency, i.e., the radiative perturbation of the net surface irradiance produced by a unit of optical depth aerosol layer, is determined at different solar zenith angles as the slope of the irradiance perturbation versus the aerosol optical depth. The estimated direct surface forcing efficiency at about 60° solar zenith angle is −(181 ± 17) W m−2 in the shortwave, and −(83 ± 7) W m−2 in the photosynthetic spectral range. The estimated daily average forcing efficiencies are of about −79 and −46 W m−2 for the shortwave and photosynthetic spectral range, respectively.

Influence of historical events and contemporary estuarine circulation on the genetic structure of the banded killifish (Fundulus diaphanus) in the  St. Lawrence River (Quebec, Canada)

2007 ◽  
Vol 85 (8) ◽  
pp. 891-901 ◽  
Author(s):  
O. Rey ◽  
J. Turgeon
Keyword(s):  
Isolation By Distance ◽  
Secondary Contact ◽  
Clinal Variation ◽  
Allele Size ◽  
Frequency Distributions ◽  
Factors Influencing ◽  
River Stretch ◽  
St Lawrence River ◽  
Differentiation Indices ◽  
Fundulus Diaphanus

Eight microsatellite markers were used to examine the historical and contemporary factors influencing the distribution of genetic variation within and among populations of Fundulus diaphanus (Lesueur, 1817) in the St. Lawrence River. Our results show that the contemporary hydrodynamics of the river affect levels of diversity and differentiation in this species. Genetic diversity increased towards downstream sites and levelled off at the upstream end of the tidal section, in the vicinity of Lake St-Pierre outlet. Likewise, differentiation and isolation-by-distance were most pronounced in the upstream, strictly fluvial section of the river. Surprisingly, however, we did not detect any significant intershore differentiation in this riparian fish species. Historical influence was also clearly detected and transcended the contemporary pattern, as revealed by an extremely strong isolation-by-distance pattern along the entire river stretch. This pattern likely results from the historical, postglacial secondary contact between two glacial races, as indicated by the clinal variation of constrasting allele size frequency distributions along the river and the significantly greater values of differentiation indices considering mutational information.

Perturbation versus variation treatment of regular relativistic Hamiltonians

1996 ◽  
Vol 252 (1-2) ◽  
pp. 51-61 ◽  
Author(s):  
Jaap G. Snijders ◽  
Andrzej J. Sadlej
Keyword(s):  
Perturbation Versus

Induction of osteoblast differentiation indices by statins in MC3T3-E1 cells

2004 ◽  
Vol 92 (3) ◽  
pp. 458-471 ◽  
Author(s):  
Toyonobu Maeda ◽  
Ayako Matsunuma ◽  
Izuru Kurahashi ◽  
Toru Yanagawa ◽  
Hiroshi Yoshida ◽  
...  
Keyword(s):  
Osteoblast Differentiation ◽  
Differentiation Indices

A modified norm calculation

1980 ◽  
Vol 17 (10) ◽  
pp. 1342-1350 ◽  
Author(s):  
K. L. Currie
Keyword(s):  
Sodium Carbonate ◽  
Sodium Metasilicate ◽  
Igneous Rocks ◽  
Good Representation ◽  
Differentiation Indices

The CIPW norm gives results which closely resemble the mode for basalt and many other quartz-saturated igneous rocks, but which depart widely from the mode for alkaline and peralkaline assemblages. A modified norm, deleting halite, thenardite, sodium metasilicate, potassium metasilicate, sodium carbonate, and larnite, and substituting sodalite, enigmatite, eudialyte, riebeckite, andradite, and Ca-tschermaks molecule (CaAl2SiO6), gives a good representation of most alkaline and peralkaline igneous rocks while giving results identical to the CIPW system for common rocks. Estimates of silica saturation, differentiation indices, and disposition of alkalies are substantially improved.

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