Search results for "Reflection"
showing 10 items of 645 documents
Benign — A typical nevi discrimination using diffuse reflectance and fluorescence multispectral imaging system
2015
Early diagnostics of skin cancer is of interest for dermatologists. Atypical nevi are not considered to be malignant, but are suspects that should be detected and monitored over time. The multispectral imaging system Nuance operating in spectral range 450–950 nm was adapted for clinical in vivo measurements in diffuse reflectance and fluorescence mode. Mean and standard deviation values of optical density and fluorescence intensity were extracted from segmented pigmented lesions (21 benign and 26 atypical nevi) and used for further analysis. It was possible to achieve 62% sensitivity and 67% specificity for discrimination between atypical and benign lesions using averaged fluorescence mean …
Studentu rakstiskās refleksijas pašizglītošanas veicināšanai angļu valodas stundās 11. klasē
2017
Studentu pašvirzība tiek noteikta pēc tādiem faktiem, kā studentu spēja domāt kritiski, vēlme mācīties patstāvīgi un viņiem piemīt ieradums un tieksme uz pašrefleksiju. Ar pašmācībām tiek pieņemts, ka audzēkņi ir motivēti mācīties un iekarot jaunās virsotnes kāres, izaugsmes nepieciešamības, personīgā gandarījuma no sasniegta un ziņkāres dēļ. Kad skolnieki sāk uzdot jautājumus par viņu mācību procesu, par ieradumiem un mērķiem tajā, viņi kļūst vairāk orientēti uz mērķu sasniegšanu un tādējādi vairāk iesaistīti refleksijas procesā. Refleksijas mērķis ir nodrošināt vairāk atbalsta studentiem, lai tie labāk zinātu viņu stiprās un vājās puses mācībās un tādējādi būtu vairāk pašvirzīti uz sevi m…
Recent Exploits of the ISOLTRAP Mass Spectrometer
2013
Abstract The Penning-trap mass spectrometer ISOLTRAP, located at the isotope-separator facility ISOLDE (CERN), is presented in its current form taking into account technical developments since 2007. Three areas of developments are presented. The reference ion sources have been modified to guarantee a sufficient supply of reference ions for mass measurements and systematic studies. Different excitation schemes have been investigated for manipulation of the ion motion in the Penning trap, to enhance either the purification or measurement process. A multi-reflection time-of-flight mass separator has been implemented and can now be routinely used for purification and as a versatile tool for bea…
Accurate determination of the complex permittivity of materials with transmission reflection measurements in partially filled rectangular waveguides
2003
An enhanced transmission reflection technique for the precise determination of the complex permittivity of dielectric materials partially filling the cross section of a rectangular waveguide is described. Dielectric properties are determined by an iterative procedure from two-port S-parameter measurements and a numerically generated propagation constant obtained from the analysis of a partially filled waveguide. Convergence of the solution is ensured from perturbational approximations. Unlike previous approaches, an uncertainty investigation is performed, taking into account all the parameters involved in the dielectric characterization. Permittivity accuracy values are presented and, hence…
Análisis sobre la personalidad eficaz en alumnado de didáctica de la educación física a través de aprendizaje-servicio
2016
El presente artículo tiene como finalidad mostrar los resultados de una investigación centrada en el Aprendizaje Servicio (en adelante ApS) y la Personalidad Eficaz aplicado a alumnos del Grado de Maestro/a de Educación Infantil, desarrollado durante el curso 2014-2015 en la Universitat Jaume I de Castellón. This article has like finality toshow the results of a research focused on the Learning Service (hereinafter ApS ) and Effective Personality applied to students of Grade Teacher of Early Childhood Education , developed during the course of 2014-2015 at the Universitat Jaume I de Castellón.
Structural modulations and phase transitions in β-eucryptite: an in-situ TEM study
1999
Beta-eucryptite as grown by the flux method has been investigated by in-situ cold- and hot-stage transmission electron microscopy (TEM). Using electron diffraction and dark-field TEM imaging, we found no evidence for the merohedral twinning that accompanies structural collapse at the β-to-α-quartz transition, suggesting a true hexagonal symmetry for the aluminosilicate framework of β-eucryptite. Selected-area electron diffraction (SAED) patterns exhibited a variety of incommensurate structures along the three a axes with an average modulation period of about 6.5 a. These modulated structures arise from superperiodic stacking parallel to (100) of two structural units with different Li config…
Low temperature structural transformations on the (001) surface of SrTiO 3 single crystals
2020
This work was supported by the Ministry of Education and Science of Ukraine under the contract M/51–2019 within the framework of the Program of Ukrainian–Latvian Scientific and Technical Cooperation and Latvian–Ukranian Grant LV-UA/2018/2. Authors are indebted to L.L. Rusevich, G. Zvejnieks, V.P. Gnezdilov and A. Glamazda for stimulating discussions.
Integrated experimental and theoretical study on the phase transition and photoluminescent properties of ZrO2:xTb3+ (x=1, 2, 4 and 8 mol %)
2021
Abstract Zirconia (ZrO2) has been intensively studied as an important ceramic material, and numerous technological applications have been found. The present work deals with synthesizing and characterizing the phase transition (cubic vs tetragonal) and photoluminescence emissions of ZrO2:xTb3+ (x = 1,2,4 and 8 mol%). The samples formed by the complex polymerization were thoroughly characterized for physicochemical properties such powder by X-ray diffraction (XRD), and Raman and diffuse reflectance spectroscopies. First-principle calculations at the density functional theory level were performed to complement and rationalize the experimental results. An energy transfer mechanism which promote…
Social Aesthetics and Moral Judgment: Pleasure, Reflection and Accountability
2019
Social Aesthetics and Moral Judgment is a stimulating collection of essays that seeks to emphasize and explicate the socially situated nature of aesthetic-moral judgment. The socially accentuated a...
El doble rechazo de la reflexión en Ser y tiempo
2021
The objective of this article is to clarify the Heideggerian rejection of the idea of reflection as the method of philosophy. The need for such explanation lies on the counterintuitive nature of this philosophical thesis and on the interpretive problems that this criticism presents in Being and Time. In order to solve them, a brief historical-conceptual examination of the reflection is realized, leading to two different meanings of the concept, a psychological and a transcendental one. Thanks to this distinction, it is possible to expose systematically the double criticism presented in Being and time and, therefore, clarify the ultimate reasons underling the Heideggerian rejection of the …