scholarly journals The F1 ledge: density, height and slope

1996 ◽  
Vol 39 (4) ◽  
Author(s):  
B. W. Reinisch ◽  
X. Huang
Keyword(s):  
Diurnal Variations ◽  
Ledge Density

Diurnal variations of the F1 region ionization at 170 km altitude and the slope ?170 = dN/dh at this height are analyzed for mid-latitude and equatorial stations: Millstone Hill, Ramey, Puerto Madryn and Jicamarca. Both the density N(t) and the slope ?(t)at 170 km show well defined diurnal variations with day-to-day variabilities of less than 10%. The heights of the F1 ledge, hmF1, are spread over ± 20 km and are therefore of limited value for modeling purposes.

Metallurgical Effects of Grain Boundary Ledges

1977 ◽  
Vol 35 ◽  
pp. 126-129
Author(s):  
L.E. Murr
Keyword(s):  
Grain Boundary ◽  
Quantitative Data ◽  
Mechanical Treatment ◽  
Unit Length ◽  
Physical And Mechanical Properties ◽  
Direct Observations ◽  
Transmission Electron ◽  
Properties Of Materials ◽  
Thermo Mechanical Treatment ◽  
Ledge Density

Ledges in grain boundaries can be identified by their characteristic contrast features (straight, black-white lines) distinct from those of lattice dislocations, for example1,2 [see Fig. 1(a) and (b)]. Simple contrast rules as pointed out by Murr and Venkatesh2, can be established so that ledges may be recognized with come confidence, and the number of ledges per unit length of grain boundary (referred to as the ledge density, m) measured by direct observations in the transmission electron microscope. Such measurements can then give rise to quantitative data which can be used to provide evidence for the influence of ledges on the physical and mechanical properties of materials.It has been shown that ledge density can be systematically altered in some metals by thermo-mechanical treatment3,4.

DIURNAL VARIATIONS IN THE EXCRETION PATTERNS OF FREE AND CONJUGATED CATECHOLAMINES IN URINE.

1983 ◽  
Vol 104 (2_Supplb) ◽  
pp. S177-S187
Author(s):  
J. Odink ◽  
H. Sandman ◽  
A.J. Speek ◽  
W.H.P. Schreurs
Keyword(s):  
Diurnal Variations ◽  
Catecholamines In Urine

0870 Percentages of milk fat, lactose, and protein are affected by diurnal variations in dairy goats

2016 ◽  
Vol 94 (suppl_5) ◽  
pp. 418-418
Author(s):  
F. Rosa ◽  
J. S. Osorio ◽  
J. Lohakare ◽  
M. Moridi ◽  
A. Ferrari ◽  
...  
Keyword(s):  
Milk Fat ◽  
Diurnal Variations ◽  
Dairy Goats

Radiocarbon (14C) Diurnal Variations in Fine Particles at Sites Downwind from Tokyo, Japan in Summer

2011 ◽  
Vol 45 (16) ◽  
pp. 6784-6792 ◽  
Author(s):  
Akihiro Fushimi ◽  
Rota Wagai ◽  
Masao Uchida ◽  
Shuichi Hasegawa ◽  
Katsuyuki Takahashi ◽  
...  
Keyword(s):  
Fine Particles ◽  
Diurnal Variations

Normal range of blood colony-forming cells (CFU-C) in humans: Influence of experimental conditions, age, sex, and diurnal variations

1979 ◽  
Vol 39 (4) ◽  
pp. 257-263 ◽  
Author(s):  
A. Ponassi ◽  
L. Morra ◽  
F. Bonanni ◽  
A. Molinari ◽  
G. Gigli ◽  
...  
Keyword(s):  
Diurnal Variations ◽  
Normal Range ◽  
Experimental Conditions

scholarly journals Seasonal and diurnal variations of black carbon and organic carbon aerosols in Bangkok

2011 ◽  
Vol 116 (D15) ◽  
Author(s):  
L. K. Sahu ◽  
Y. Kondo ◽  
Y. Miyazaki ◽  
Prapat Pongkiatkul ◽  
N. T. Kim Oanh
Keyword(s):  
Organic Carbon ◽  
Black Carbon ◽  
Diurnal Variations ◽  
Seasonal And Diurnal Variations ◽  
Carbon Aerosols
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