25 research outputs found
Azimuthal and polar anchoring energies of aligning layers structured by nonlinear laser lithography
In spite of the fact that there are different techniques in the creation of
the high-quality liquid crystals (LCs) alignment by means of various surfaces,
the azimuthal and polar anchoring energies as well as the pre-tilt angle are
important parameters to all of them. Here, the modified by a certain manner
aligning layers, previously formed by nonlinear laser lithography (NLL), having
high-quality nano-periodic grooves on Ti surfaces, recently proposed for LC
alignment was studied. The change of the scanning speed of NLL in the process
of nano-structured Ti surfaces and their further modification by means of
ITO-coating, and deposition of polyimide film has enabled different aligning
layers, whose main characteristics, namely azimuthal and polar anchoring
energies, were measured. For the modified aligning layers, the dependencies of
the twist and pre-tilt angles for LC cells filled by nematic E7
({\Delta}{\epsilon} > 0) and MLC-6609 ({\Delta}{\epsilon} < 0) were obtained.
Also the contact angle for droplets of isotropic liquid (glycerol), and nematic
LCs was measured for the various values of the scanning speed during the laser
processing.Comment: 49 pages, 18 figure
Multiatlas Segmentation Using Robust Feature-Based Registration
This paper presents a pipeline which uses a multiatlas approach for multiorgan segmentation in whole-body CT images. In order to obtain accurate registrations between the target and the atlas images, we develop an adapted feature-based method which uses organ-specific features. These features are learnt during an offline preprocessing step, and thus, the algorithm still benefits from the speed of feature-based registration methods. These feature sets are then used to obtain pairwise non-rigid transformations using RANSAC followed by a thin-plate spline refinement or NiftyReg. The fusion of the transferred atlas labels is performed using a random forest classifier, and finally, the segmentation is obtained using graph cuts with a Potts model as interaction term. Our pipeline was evaluated on 20 organs in 10 whole-body CT images at the VISCERAL Anatomy Challenge, in conjunction with the International Symposium on Biomedical Imaging, Brooklyn, New York, in April 2015. It performed best on majority of the organs, with respect to the Dice index
Partial trisomy 18q11.2-->qter due to de novo unbalanced translocation of chromosomes 15 and 18 analyzed by fluorescence in situ hybridization.
This report presents a case with partial trisomy 18q resulting from de novo unbalanced translocation of chromosomes 15 and 18 displaying the features of pure trisomy. This is the first reported case with partial trisomy 18q due to unbalanced translocation between chromosomes 15 and 18. Clinical findings of our case have been compared with the reported cases' had partial trisomy 18q and the importance to recognize the cases with chromosome abnormalities to give genetic counseling and prenatal diagnosis for subsequent pregnancies has emphasized
of chromosomes 15 and 18 analyzed by fluorescence in situ hybridization
This report presents a case with partial trisomy 18q resulting from de novo unbalanced translocation of chromosomes 15 and 18 displaying the features of pure trisomy. This is the first reported case with partial trisomy 18q due to unbalanced translocation between chromosomes 15 and 18. Clinical findings of our case have been compared with the reported cases' had partial trisomy 18q and the importance to recognize the cases with chromosome abnormalities to give genetic counseling and prenatal diagnosis for subsequent pregnancies has emphasized. (C) 2004 Elsevier SAS. All rights reserved