TOWARD AN OPTIMAL ANALYSIS OF HYPERSPECTRAL DATA

In hyperspectral data materials of practical interest usually exist in a number of states and are observed in a number of conditions of illumination. It is thus necessary to characterize them not with a single spectral response but with a family of responses. One of the most versatile means for representing such a family of responses quantitatively is to model each by a normal distribution, as this makes possible classification by assigning the class to a sample based on Bayes rule. This leads to competitive performance only under special circumstances. The purpose of this dissertation is to improve the quantitative definitions of classes by replacing the classical normal model with more flexible and powerful alternatives and thereby investigate the relationship between class definition precision and classification accuracy. One other factor that directly affects the precision of class definitions is the number of labeled samples available for training. Characterizing class data with a limited set of labeled samples may have severe consequences. In a typical setting a remote sensing analyst should either sacrifice from the classifier performance by confining himself to the already available labeled data set or commit more time and effort to acquire more labeled samples both of which comes at a price. The present study also addresses this problem by proposing a semi-supervised binary classifier which seeks to incorporate unlabeled data into the training in order to improve the quantitative definitions of classes and hence improve the classifier performance at no extra cost

Crystal structure of methyl (6-(2-fluorobenzoyl)-5-chloro-2-benzoxazolinon-3-yl)-acetate, C17H11CIFNO5

C17H11CIFNO5, monoclinic, P12(1)/cl (no. 14), a = 7.489(5) angstrom, b = 18.367(5) angstrom, c = 11.752(5) angstrom, beta = 94.222(5)degrees. V = 1612.1 angstrom(3), Z = 4, R-gt(F) = 0.032, wR(ref)(F-2) = 0.083, T = 293 K

Methyl [6-(2-chlorobenzoyl)-2-oxo-2,3-dihydro,3-benzoxazol-3-yl]acetate

In the molecular structure of the title compound, C17H12ClNO5, the 1,3-benzoxazole ring system makes a dihedral angle of 72.96 (7)degrees with the benzene ring of the 2-chlorobenzoyl group. In the crystal structure, two intramolecular C-H center dot center dot center dot O hydrogen bonds influence the molecular conformation

A Customized Zirconia Abutment Design Combined with a CAD/CAM Laminate Veneer: A Clinical Report

WOS: 000351884800006PubMed ID: 25738340An alternative prosthetic treatment approach for single implants in the maxillary esthetic zone with an improper implant axis, limited interocclusal distance, inadequate abutment retention, and screw holes located at the labial surface is presented in this clinical report. The gingiva and soft tissues were contoured with provisional composite restorations to mimic the emergence profile of lateral incisors. Prefabricated zirconia abutments were customized with laminate veneer preparations by appropriate ceramic build-up with reference from the reshaped gingiva to avoid labiolingual overcontour. The laminate veneers were fabricated by computer-aided design/computer-assisted manufacture to cover the screw hole of the angulated abutment at the labial surface. Preliminary results revealed improvement in esthetics; however, long-term clinical follow-up should be performed

Effect of Veneering Methods on Zirconia Framework-Veneer Ceramic Adhesion and Fracture Resistance of Single Crowns

WOS: 000367471900004PubMed ID: 25319017Purpose: The aim of this study was to evaluate the fracture resistance (FR) and shear bond strength (SBS) via finite element analysis (FEA) of zirconia framework veneered with different methods. Materials and Methods: Zirconia frameworks were prepared as crowns for FR and cubic blocks for SBS (N = 60, n = 10). The specimens were veneered with one of the following veneering methods: (a) overcemented file-splitting (OCF), (b) layering (L), or (c) overpressing (P). For crowns, stainless steel dies (N = 30; chamfer: 1 mm) were scanned using a contrast spray. Bilayered design for OCF and reduced design (1 mm) for both L and P were performed by computer-aided design and manufacturing. For the SBS test, zirconia blocks were sectioned (4 x 4 x 4 mm(3)) under water cooling and sintered. Frameworks were veneered with compatible ceramics for each veneering method and subjected to mechanical tests. The milled suprastructures were bonded to zirconia frameworks using a resin composite in Group OCF and photopolymerized. Crowns were cemented to the metal dies with resin modified glass-ionomer cement. All specimens were stored at 37 degrees C, 100% humidity for 48 hours prior to mechanical tests. Data were statistically analyzed (ANOVA, Bonferroni tests, alpha = 0.05). Fractured specimens were examined under scanning electron microscopy (SEM), and FEA modeling of the crowns was performed. Results: Mean FR values (N) were significantly higher with L (6102 +/- 1519) and P (4117 +/- 1083) than with of OCF (1900 +/- 254) (p = 0.01). The mean SBS (MPa) in OCF (24 +/- 4) was significantly lower (p 0.05). For crown restorations, while only adhesive failures were found in OCF, cohesive failures within veneering ceramic were more frequent in P and L. FEA verified these findings. Conclusion: Veneering methods based on layering or pressing may reduce ceramic chipping but the overcemented file-splitting method does not seem to prevent this failure. Clinical Significance: Layering and overpressing veneering methods on zirconia frameworks with reduced design might decrease chipping compared to overcemented file-splitting, where in the latter, zirconia framework and feldspathic suprastructure are combined using a resin cement.Ege University Scientific Research Project DepartmentEge University [2011-DIS-006]This research was supported in part by the Ege University Scientific Research Project Department (Project no. 2011-DIS-006)

Tuning of narrow-bandwidth photonic crystal devices etched in InGaAsP planar waveguides by Liquid Crystal infiltration

Photonic crystal (PC) devices in the InP/InGaAsP/InP planar waveguide system exhibiting narrow bandwidth features were investigated for use as ultrasmall and tunable building blocks for photonic integrated circuits at the telecom wavelength of 1.55 μm.