scholarly journals Effects of modulation of atomic injection and exit rate on spatial evolution of phase-dependent lasing without inversion gain and intensity in an open V-type system

2012 ◽  
Vol 61 (18) ◽  
pp. 184207
Author(s):  
Liang Ying ◽  
Jia Ke-Ning ◽  
Liu Zhong-Bo ◽  
Tong Dian-Min ◽  
Fan Xi-Jun
Keyword(s):  
Type System ◽  
Spatial Evolution ◽  
Exit Rate ◽  
Lasing Without Inversion

Enhancement of lasing without inversion induced by spontaneously generated coherence in an open ladder-type system

2006 ◽  
Vol 2 (6) ◽  
pp. 474-476
Author(s):  
Ai-yun Li ◽  
Xi-jun Fan ◽  
Fan-ge Bu ◽  
Hong-xia Qiao ◽  
Zhi-zhan Xu
Keyword(s):  
Type System ◽  
Spontaneously Generated Coherence ◽  
Lasing Without Inversion

Lasing without inversion in an open Λ-type system: self-pulse and continuous wave

2005 ◽  
Vol 37 (1) ◽  
pp. 129-133 ◽  
Author(s):  
X. J. Fan ◽  
N. Cui ◽  
H. Ma ◽  
A. Y. Li ◽  
H. Li
Keyword(s):  
Continuous Wave ◽  
Type System ◽  
Lasing Without Inversion

Effects of the upper level coupling field on lasing without inversion in a V-type system

2007 ◽  
Vol 42 (3) ◽  
pp. 489-493 ◽  
Author(s):  
D. G. Han ◽  
Y. G. Zeng ◽  
H. Guo ◽  
W. Chen ◽  
H. Lu ◽  
...  
Keyword(s):  
Type System ◽  
Coupling Field ◽  
Lasing Without Inversion ◽  
Upper Level

Space and Time Distribution of Hard X-Ray Emission in a Loop at the Beginning of a Flare

1994 ◽  
Vol 144 ◽  
pp. 275-277
Author(s):  
M. Karlický ◽  
J. C. Hénoux
Keyword(s):  
Time Distribution ◽  
Electron Bombardment ◽  
Spatial Evolution ◽  
Superthermal Electrons ◽  
Flare Loop ◽  
X Ray ◽  
Superthermal Electron ◽  
Flare Loops ◽  
Chromospheric Evaporation ◽  
Temporal And Spatial

AbstractUsing a new ID hybrid model of the electron bombardment in flare loops, we study not only the evolution of densities, plasma velocities and temperatures in the loop, but also the temporal and spatial evolution of hard X-ray emission. In the present paper a continuous bombardment by electrons isotropically accelerated at the top of flare loop with a power-law injection distribution function is considered. The computations include the effects of the return-current that reduces significantly the depth of the chromospheric layer which is evaporated. The present modelling is made with superthermal electron parameters corresponding to the classical resistivity regime for an input energy flux of superthermal electrons of 109erg cm−2s−1. It was found that due to the electron bombardment the two chromospheric evaporation waves are generated at both feet of the loop and they propagate up to the top, where they collide and cause temporary density and hard X-ray enhancements.

Ultrastructural characteristics of sporidia of Ustilago

1989 ◽  
Vol 47 ◽  
pp. 786-787
Author(s):  
Patricia N. Hackney
Keyword(s):  
Electron Microscope ◽  
Type System ◽  
Tube Formation ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
University Of Wisconsin ◽  
Transmission Electron ◽  
Ustilago Hordei ◽  
Silene Alba ◽  
The University

Ustilago hordei and Ustilago violacea are yeast-like basidiomycete pathogens ofHordeum vulgare and Silene alba respectively. The mating type system in both species of Ustilago is bipolar, with alleles, A,a, (U.hordei) and a1, a2 (U.violacea) at a single locus. Haploid sporidia maintain the asexual phase by budding, while the sexual phase is initiated by conjugation tube formation between the mating types during budding and conjugation.For observation of budding, sporidia were prepared by culturing the four types on YEG (yeast extract glucose) broth for 24 hours. After centrifugation at 5000g cells were either left unmated or mated in a1/a2,A/a combinations. The sporidia were then mixed 1:1 with 4% agar and the resulting 1mm cubes fixed in 8% gluteraldehyde and post fixed in osmium tetroxide. After dehydration and embedding cubes were thin sectioned with a LKB ultratome and photographed in a Zeiss 9s transmission electron microscope or in an AE1 electron microscope of MK11 1MEV at the High Voltage Electron Microscopy Center of the University of Wisconsin-Madison.

Thermal comfort conditions in a classroom conditioned by a split-type system

2017 ◽  
Author(s):  
Rogério Vilain ◽  
Marcelo Pereira ◽  
Nathan Mendes ◽  
katia cordeiro ◽  
anastacio da silva junior
Keyword(s):  
Thermal Comfort ◽  
Type System
Sign in / Sign up

Export Citation Format

Share Document