Mode content analysis from intensity measurements in a few cross sections of oversized waveguides

1997 ◽  
Vol 18 (8) ◽  
pp. 1505-1516 ◽  
Author(s):  
N. L. Aleksandrov ◽  
A. V. Chirkov ◽  
G. G. Denisov ◽  
S. V. Kuzikov
1970 ◽  
Vol 25 (11) ◽  
pp. 1617-1626 ◽  
Author(s):  
H. Frank ◽  
M. Neiger ◽  
H.-P. Popp

Abstract A wall stabilized low-current cylindric arc was used to produce the radiation of the negative Bromine-ions. The radiation consists of an affinity-continuum with a long-wave threshold of 3682 Å, yielding an electron affinity for Bromine of 3.366 eV, and of an intense electron-atom Bremsstrahlung in the visible. Intensity measurements of the continua allow the determination of the photo-detachment-and attachment-cross-sections of Bromine and also the determination of the mean elastic cross-section of electrons against Bromine atoms.


1978 ◽  
Vol 56 (7) ◽  
pp. 891-896 ◽  
Author(s):  
M. K. Wade ◽  
M. Czajkowski ◽  
L. Krause

The transfer of excitation from excited mercury atoms to ground-state thallium atoms was investigated using techniques of sensitized fluorescence. A Hg–Tl vapor mixture contained in a quartz cell was irradiated with Hg 2537 Å resonance radiation which caused the mercury atoms to become excited to the 63P1, state. Subsequent collisions between the Hg(63P1) and Tl(62P1/2) atoms resulted in the population of the 82S1/2, 62D, and 72S1/2 thallium states, whose decay gave rise to sensitized fluorescence of wavelengths 3231, 3520, 3776, and 5352 Å. Intensity measurements on the sensitized fluorescence and on the Hg 2537 Å resonance fluorescence, observed at right angles to the direction of excitation, yielded cross sections of 3.0, 0.3, and 0.05 Å2 for collisional excitation transfer from Hg(63P1) to the 82S1/2, 62D, and 72S1/2 states in thallium, respectively. The results are fully consistent with previously determined cross sections for excitation transfer in other binary metallic vapor systems.


2012 ◽  
Vol 62 (3) ◽  
pp. 389-402 ◽  
Author(s):  
K. Ohkubo ◽  
S. Kubo ◽  
T. Shimozuma ◽  
Y. Yoshimura ◽  
H. Igami ◽  
...  

2018 ◽  
Vol 124 (1) ◽  
pp. 40-51 ◽  
Author(s):  
Yuan Wen ◽  
Kevin A. Murach ◽  
Ivan J. Vechetti ◽  
Christopher S. Fry ◽  
Chase Vickery ◽  
...  

Analysis of skeletal muscle cross sections is an important experimental technique in muscle biology. Many aspects of immunohistochemistry and fluorescence microscopy can now be automated, but most image quantification techniques still require extensive human input, slowing progress and introducing the possibility of user bias. MyoVision is a new software package that was developed to overcome these limitations. The software improves upon previously reported automatic techniques and analyzes images without requiring significant human input and correction. When compared with data derived by manual quantification, MyoVision achieves an accuracy of ≥94% for basic measurements such as fiber number, fiber type distribution, fiber cross-sectional area, and myonuclear number. Scientists can download the software free from www.MyoVision.org and use it to automate the analysis of their own experimental data. This will improve the efficiency and consistency of the analysis of muscle cross sections and help to reduce the burden of routine image quantification in muscle biology. NEW & NOTEWORTHY Scientists currently analyze images of immunofluorescently labeled skeletal muscle using time-consuming techniques that require sustained human supervision. As well as being inefficient, these techniques can increase variability in studies that quantify morphological adaptations of skeletal muscle at the cellular level. MyoVision is new software that overcomes these limitations by performing high-content analysis of muscle cross sections with minimal manual input. It is open source and freely available.


2014 ◽  
Vol 42 (10) ◽  
pp. 3358-3364 ◽  
Author(s):  
Sudheer K. Jawla ◽  
Michael A. Shapiro ◽  
Hiroshi Idei ◽  
Richard J. Temkin

1973 ◽  
Vol 51 (3) ◽  
pp. 334-342 ◽  
Author(s):  
M. Czajkowski ◽  
G. Skardis ◽  
L. Krause

Collisional transfer of excitation from mercury to sodium was investigated using methods of sensitized fluorescence. A mixture of mercury and sodium vapors at low pressure was irradiated with Hg 2537 Å resonance radiation, producing a population of Hg(63P1) atoms whose inelastic collisions with ground-state sodium atoms resulted in a transfer of excitation energy to close-lying S, P, and D states in sodium. The subsequent decay of these states manifested itself in the emission of a sensitized fluorescent spectrum. Absolute intensity measurements on the components of the spectrum yielded 21 cross sections whose magnitudes range from 0.02 to 38.5 Å2 and which exhibit a pronounced resonance with ΔE, the energy defect between Hg (63P1) and the appropriate level in sodium.


2003 ◽  
Vol 51 (12) ◽  
pp. 2402-2408 ◽  
Author(s):  
P.V. Nikitin ◽  
D.D. Stancil ◽  
A.G. Cepni ◽  
A.E. Xhafa ◽  
O.K. Tonguz ◽  
...  

Author(s):  
P.V. Nikitin ◽  
D.D. Stancil ◽  
A.G. Cepni ◽  
A.E. Xhafa ◽  
O.K. Tonguz ◽  
...  

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