Section efficace de la réaction Penning pour les atomes

1985 ◽  
Vol 63 (12) ◽  
pp. 1506-1512 ◽  
Author(s):  
J. M. Gagné ◽  
P. Bouchard ◽  
A. Gleizes
Keyword(s):  
Comparative Study ◽  
Cross Section ◽  
Hollow Cathode ◽  
Section Efficace ◽  
Average Cross Section ◽  
Cross Section Formula

The average cross section [Formula: see text] for the Penning reaction between Kr (1s5) and [Formula: see text] atoms has been obtained from a comparative study of Kr–U and Kr–Th gas combinations in a hollow-cathode-type generator. The experimental value obtained is 2,8 × 10−15 cm2 ± 50%.

scholarly journals THE CHIRAL COLOR SYMMETRY OF QUARKS AND G′-BOSON CONTRIBUTIONS TO CHARGE ASYMMETRY IN $t \bar t$-PRODUCTION AT THE LHC AND TEVATRON

2013 ◽  
Vol 28 (10) ◽  
pp. 1350035 ◽  
Author(s):  
I. V. FROLOV ◽  
M. V. MARTYNOV ◽  
A. D. SMIRNOV
Keyword(s):  
Cross Section ◽  
Charge Asymmetry ◽  
Mixing Angle ◽  
Color Symmetry ◽  
Text Production ◽  
Cross Section Formula ◽  
Free Parameters ◽  
The Cross

The contributions of G′-boson predicted by the chiral color symmetry of quarks to the charge asymmetry [Formula: see text] in [Formula: see text]-production at the LHC and to the forward–backward asymmetry [Formula: see text] in [Formula: see text]-production at the Tevatron are calculated and analyzed in dependence on two free parameters of the model, the G′ mass mG′ and mixing angle θG. The mG′ - θG regions of 1 σ consistency with the CMS data on the cross-section [Formula: see text] and on the charge asymmetry [Formula: see text] are found and compared with those resulted from the CDF data on the cross-section [Formula: see text] and on the forward–backward asymmetry [Formula: see text] of [Formula: see text]-production at the Tevatron with account of the current SM predictions for [Formula: see text].

The use of the cutaneous saphenous nerve as a source of nerve graft material in the dog (the use of the CSN as a graft)

2001 ◽  
Vol 14 (02) ◽  
pp. 84-89 ◽  
Author(s):  
O. Vigneron ◽  
Y. Duchossoy ◽  
P. Moissonnier
Keyword(s):  
Peripheral Nerve ◽  
Cross Section ◽  
Surgical Approach ◽  
Nerve Graft ◽  
Saphenous Nerve ◽  
Graft Material ◽  
Femoral Length ◽  
Average Cross Section ◽  
Peripheral Nerve Graft ◽  
Multiple Levels

This paper analyses the feasibility of using the cutaneous saphenous nerve (CSN) as a source of peripheral nerve graft (PNG). In 34 fresh dog cadavers, the PNG length (PNGL) was measured, pattern of collateralization was studied, fascicles diameter and number were assessed at multiple levels along the length of the CSN (levels of section A, B, C and D) and surgical approach was described. The PNGL was correlated to femoral length. The pattern of CSN collateralization was consistent for all but 2 of the dogs. The average cross section diameter and fascicle number of the CSN was 2.0 to 0.1 mm (1 to 7 fascicles). CSN provides a large-sized, easily accessible nerve graft that could be used to bridge nerve gaps in the dog.

COMPARATIVE STUDY OF THE STRUCTURAL AND ELECTRONIC PROPERTIES OF BN(5, 5) AND C(5, 5) NANOTUBES UNDER PRESSURE

2010 ◽  
Vol 24 (24) ◽  
pp. 4851-4859
Author(s):  
KAIHUA HE ◽  
GUANG ZHENG ◽  
GANG CHEN ◽  
QILI CHEN ◽  
MIAO WAN ◽  
...  
Keyword(s):  
High Pressure ◽  
Comparative Study ◽  
Charge Density ◽  
Band Gap ◽  
Electronic Properties ◽  
Cross Section ◽  
First Principles ◽  
First Principles Calculations ◽  
Zinc Blende ◽  
Structural And Electronic Properties

The structural and electronic properties of BN(5, 5) and C(5, 5) nanotubes under pressure are studied by using first principles calculations. In our study range, BN(5, 5) undergoes obvious elliptical distortion, while for C(5, 5) the cross section first becomes an ellipse and then, under further pressure, is flattened. The band gap of BN(5, 5) decreases with increasing pressure, which is inverse to that of zinc blende BN, whereas for C(5, 5) the metallicity is always preserved under high pressure. The population of charge density indicates that intertube bonding is formed under pressure. We also find that BN(5, 5) may collapse, and a new polymer material based on C(5, 5) is formed by applying pressure.

Left and right regular elements of the semigroups of transformations preserving an equivalence relation and a cross-section

2019 ◽  
Vol 12 (04) ◽  
pp. 1950058
Author(s):  
Nares Sawatraksa ◽  
Chaiwat Namnak ◽  
Ronnason Chinram
Keyword(s):  
Cross Section ◽  
Equivalence Relation ◽  
Regular Semigroups ◽  
Completely Regular ◽  
Regular Elements ◽  
Left Regular ◽  
Completely Regular Semigroups ◽  
Cross Section Formula ◽  
Left And Right

Let [Formula: see text] be the semigroup of all transformations on a set [Formula: see text]. For an arbitrary equivalence relation [Formula: see text] on [Formula: see text] and a cross-section [Formula: see text] of the partition [Formula: see text] induced by [Formula: see text], let [Formula: see text] [Formula: see text] Then [Formula: see text] and [Formula: see text] are subsemigroups of [Formula: see text]. In this paper, we characterize left regular, right regular and completely regular elements of [Formula: see text] and [Formula: see text]. We also investigate conditions for which of these semigroups to be left regular, right regular and completely regular semigroups.

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