scholarly journals PT-axisymmetric VCSELs with linear central defect

Author(s):  
Waqas W. Ahmed ◽  
Muriel Botey ◽  
Ramon Herrero ◽  
Kestutis Staliunas
Keyword(s):  
Author(s):  
C. Goessens ◽  
D. Schryvers ◽  
J. Van Landuyt ◽  
A. Verbeeck ◽  
R. De Keyzer

Silver halide grains (AgX, X=Cl,Br,I) are commonly recognized as important entities in photographic applications. Depending on the preparation specifications one can grow cubic, octahedral, tabular a.o. morphologies, each with its own physical and chemical characteristics. In the present study crystallographic defects introduced by the mixing of 5-20% iodide in a growing AgBr tabular grain are investigated. X-ray diffractometry reveals the existence of a homogeneous Ag(Br1-xIx) region, expected to be formed around the AgBr kernel. In fig. 1 a two-beam BF image, taken at T≈100 K to diminish radiation damage, of a triangular tabular grain is presented, clearly showing defect contrast fringes along four of the six directions; the remaining two sides show similar contrast under relevant diffraction conditions. The width of the central defect free region corresponds with the pure AgBr kernel grown before the mixing with I. The thickness of a given grain lies between 0.15 and 0.3 μm: as indicated in fig. 2 triangular (resp. hexagonal) grains exhibit an uneven (resp. even) number of twin interfaces (i.e., between + and - twin variants) parallel with the (111) surfaces. The thickness of the grains and the existence of the twin variants was confirmed from CTEM images of perpendicular cuts.


2013 ◽  
pp. 139-166
Author(s):  
Benedikt Lorenz Proffen ◽  
Martha M. Murray

2021 ◽  
Vol 17 (3) ◽  
pp. 51-57
Author(s):  
E.N. Soldatenkova

The article is devoted to the problem of the functional structure of communicative action. Based on theoretical analysis and many years of pedagogical experience of working with children with affective pathology (autism spectrum disorders), the author recreates and refines the studies of cultural-historical theory and answers its main question — a method problem: the influence of holistic interfunctional analysis on overcoming semantic bias (central defect and syndrome-forming factor of psychopathology) and the development of a more universal communication form — verbal communication in non-speaking children with autism spectrum disorders in preschool age (by means of restructuring the way the impaired function is realized). The described conditions can be taken into account when constructing an intermediary (lively communicative action) both in the practice of general education (to prevent the occurrence of motivational disorders and increase the age limit) and in working with children with affective pathology (especially with children with autism spectrum disorders).


2020 ◽  
Vol 93 (4) ◽  
Author(s):  
Thiago Nunes Jorge ◽  
Cristhian Aguirre ◽  
Alberto de Arruda ◽  
José Barba-Ortega
Keyword(s):  

The Lancet ◽  
1951 ◽  
Vol 257 (6647) ◽  
pp. 171-172
Author(s):  
M.P. Curwen
Keyword(s):  

2015 ◽  
Vol 10 (1) ◽  
Author(s):  
Bekir Karakilic ◽  
Emin Taskiran ◽  
Basak Doganavsargil ◽  
Bora Uzun ◽  
Salih Celik ◽  
...  

1998 ◽  
Vol 65 (1) ◽  
pp. 24-27
Author(s):  
M. Pennisi

Urogenital prolapse and urinary incontinence secondary to multiple defects of the pelvic floor (cystocele caused by lateral and central defect of the pubocervical fascia, hysterocele, rectocele) may also be successfully treated by vaginal approach only. From October ‘95 to September ‘97, 78 women underwent colpohysterectomy, Lahodny bladder suspension and perineoplasty and in 15 of them the vaginal cupola was anchored to the right sacrospinous ligament. In another 3 women Lahodny's procedure was associated with just perineoplasty, since there was a cystocele caused by lateral and central defect of the pubocervical fascia and a rectocele, while the uterus was fixed in place. Prior to operation the 81 patients underwent a colpocytological exam, pelvic ultrasound, a urodynamic exam with flow pressure study and assessment of the leak pressure with Valsalva manoeuvre, and in the cases of constipation or fecal incontinence, coloproctological investigation. The suprapubic catheter that was always positioned at the end of the operation was on average removed on the 10th day, upon the disappearance of significant post-micturitional residue. There is no micturitional difficulty in any patient. Given the short follow-up, the results are given of the 44 women observed for at least one year, 40 of whom are continent. Recurrent prolapse was found in 8 cases, 2 involving the anterior, 40 the rear and 2 the central wall. No patient has had a return of stress incontinence.


AIAA Journal ◽  
2021 ◽  
pp. 1-6
Author(s):  
Ke Wang ◽  
Qiang Tao ◽  
Changguo Wang
Keyword(s):  

2010 ◽  
Vol 322 (9-12) ◽  
pp. 1452-1455 ◽  
Author(s):  
Son-Hsien Chen ◽  
Ivo Klik ◽  
Ching-Ray Chang

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