3D-analysis of spatial anisotropy for linear electro-optic effect in crystal materials: Geometry determination of the most efficient electro-optic coupling

2008 ◽  
Author(s):  
Anatoliy Andrushchak ◽  
Bohdan Mytsyk ◽  
Natalya Demyanyshyn ◽  
Andriy Lavinskyy ◽  
Oleg Yurkevych ◽  
...  
Keyword(s):  
3D Analysis ◽  
Spatial Anisotropy ◽  
Electro Optic

Direct phase determination in electron crystallography: small organic molecules

1992 ◽  
Vol 50 (2) ◽  
pp. 1166-1167
Author(s):  
Douglas L. Dorset
Keyword(s):  
Organic Molecules ◽  
Data Sets ◽  
Temperature Structure ◽  
3D Analysis ◽  
Intensity Data ◽  
Electron Crystallography ◽  
Phase Determination ◽  
Measured Intensity ◽  
3D Data

The quantitative use of electron diffraction intensity data for the determination of crystal structures represents the pioneering achievement in the electron crystallography of organic molecules, an effort largely begun by B. K. Vainshtein and his co-workers. However, despite numerous representative structure analyses yielding results consistent with X-ray determination, this entire effort was viewed with considerable mistrust by many crystallographers. This was no doubt due to the rather high crystallographic R-factors reported for some structures and, more importantly, the failure to convince many skeptics that the measured intensity data were adequate for ab initio structure determinations.We have recently demonstrated the utility of these data sets for structure analyses by direct phase determination based on the probabilistic estimate of three- and four-phase structure invariant sums. Examples include the structure of diketopiperazine using Vainshtein's 3D data, a similar 3D analysis of the room temperature structure of thiourea, and a zonal determination of the urea structure, the latter also based on data collected by the Moscow group.

Experimental Determination of the Electro-Optic Coefficients in BaTiO 3 :Rh at 633 nm and 850 nm

2003 ◽  
Vol 296 (1) ◽  
pp. 47-56
Author(s):  
A. Maillard ◽  
S. Bahsine ◽  
G. Kugel ◽  
D. Rytz ◽  
R. S. Klein
Keyword(s):  
Experimental Determination ◽  
Electro Optic

Spatial anisotropy of linear electro-optic effect in crystal materials: II. Indicative surfaces as efficient tool for electro-optic coupling optimization in LiNbO3

2009 ◽  
Vol 47 (1) ◽  
pp. 24-30 ◽  
Author(s):  
A.S. Andrushchak ◽  
B.G. Mytsyk ◽  
N.M. Demyanyshyn ◽  
M.V. Kaidan ◽  
O.V. Yurkevych ◽  
...  
Keyword(s):  
Efficient Tool ◽  
Spatial Anisotropy ◽  
Electro Optic

Evaluation of web reinforcements in prestressed concrete box girders through shear-transverse bending domains

2020 ◽  
pp. 136943322098170
Author(s):  
Michele Fabio Granata ◽  
Antonino Recupero
Keyword(s):  
Analytical Model ◽  
Prestressed Concrete ◽  
3D Analysis ◽  
Box Girders ◽  
Element Analysis ◽  
Cross Sectional ◽  
Interaction Domains ◽  
Global And Local ◽  
Resultant Forces

In concrete box girders, the amount and distribution of reinforcements in the webs have to be estimated considering the local effects due to eccentric external loads and cross-sectional distortion and not only the global effect due to the resultant forces of a longitudinal analysis: shear, torsion and bending. This work presents an analytical model that allows designers to take into account the interaction of all these effects, global and local, for the determination of the reinforcements. The model is based on the theory of stress fields and it has been compared to a 3D finite element analysis, in order to validate the interaction domains. The results show how the proposed analytical model allows an easy and reliable reinforcement evaluation, in agreement with a more refined 3D analysis but with a reduced computational burden.

Determination of Ethnic Variation in Infant Nasolabial Anthropometry Using 3D Photographs: Implications for Bilateral Cleft Lip Nasal Correction

2021 ◽  
pp. 105566562110244
Author(s):  
Diana S. Jodeh ◽  
Jacqueline M. Ross ◽  
Maria Leszczynska ◽  
Fatima Qamar ◽  
Rachel L. Dawkins ◽  
...  
Keyword(s):  
African American ◽  
Interrater Reliability ◽  
Cleft Lip ◽  
Pearson Correlation ◽  
Statistical Significance ◽  
3D Analysis ◽  
Pediatric Clinic ◽  
Bilateral Cleft Lip ◽  
Post Hoc

Objective: We aimed to assess significant ethnic variabilities in infants’ nasolabial anthropometry to motivate variations in surgical correction of a synchronous bilateral cleft lip/nasal anomaly, specifically whether a long columella is a European feature, therefore accepting a short columella and/or delayed columellar lengthening suitable for reconstruction in ethnic patients. Methods: Thirty-three infants without craniofacial pathology (10 African American [AA], 7 Hispanic [H], and 16 of European descent [C]), ages 3 to 8 months, presenting to the Johns Hopkins All Children’s general pediatric clinic were recruited. Four separate 3D photographs (2 submental and frontal views each) were taken using the Vectra H1 handheld camera (Canfield Imaging). Eighteen linear facial distances were measured using Mirror 3D analysis (Canfield Imaging Systems). Difference between ethnicities was measured using analysis of variance with the Bonferroni/Dunn post hoc comparisons. Pearson correlation was employed for interrater reliability. All statistical analyses were carried out using SPSS version 21.0 (IBM Corp), with statistical significance set at P < .05. Results: Nasal projection (sn-prn) and columella length (sn-c) did not differ significantly between groups ( P = .9). Significant differences were seen between ethnic groups in nasal width (sbal-sbal [C-AA; P = .02]; ac-ac [C-AA; P = .00; H-AA; P = .04]; al-al [C-AA; P = .00; H-AA; P = .001]) and labial length (sn-ls [C-AA; P = .041]; sn-sto [C-AA; P = .005]; Cphs-Cphi L [C-AA; P = .013]; Cphs-Cphi R [C-AA; P = .015]). Interrater reliability was good to excellent and significantly correlated for all measures. Conclusions: African American infants exhibited wider noses and longer lips. No difference was noted in nasal projection or columella length, indicating that these structures should be corrected during the primary cleft lip and nasal repair for all patients and should not be deferred to secondary correction.

scholarly journals Polarization-sensitive dual-comb spectroscopy with an electro-optic modulator for determination of anisotropic optical responses of materials

2019 ◽  
Vol 27 (24) ◽  
pp. 35141 ◽  
Author(s):  
Kana A. Sumihara ◽  
Sho Okubo ◽  
Kenichi Oguchi ◽  
Makoto Okano ◽  
Hajime Inaba ◽  
...  
Keyword(s):  
Optical Responses ◽  
Electro Optic ◽  
Electro Optic Modulator

scholarly journals Determination of the electric field and its Hilbert transform in femtosecond electro-optic sampling

2020 ◽  
Vol 101 (3) ◽  
Author(s):  
P. Sulzer ◽  
K. Oguchi ◽  
J. Huster ◽  
M. Kizmann ◽  
T. L. M. Guedes ◽  
...  
Keyword(s):  
Electric Field ◽  
Hilbert Transform ◽  
Electro Optic
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