Search results for "Coherence"
showing 10 items of 905 documents
Microwave surface impedance of proximity-coupled superconducting (Nb)/spin-glass (CuMn) bilayers
1998
The surface impedance of Nb/CuMn (superconducting/spin-glass) bilayers has been measured at 10 GHz with the parallel plate resonator technique to obtain information about the exotic behavior of the order parameter in superconducting/magnetic proximity systems. The data strongly differs from the superconducting/normal-metal case, showing the magnetic nature of the CuMn layer, which acts as a weak ferromagnet. The results are described in the framework of two models for the electrodynamics of superconducting/ferromagnetic (S/M) bilayers characterized by a proximity-coupling length scale which is independent of temperature.
Agreement of predicted intraocular lens power using swept-source optical coherence tomography and partial coherence interferometry
2021
PURPOSE To analyze the agreement of the predicted intraocular lens (IOL) power obtained with ANTERION, IOLMaster 700 and Pentacam AXL biometers. METHODS We calculated the monofocal and trifocal IOL power using the SRK/T, Haigis, Barrett Universal II and Hoffer Q formulas for 106 eyes. IOL power agreement between devices was evaluated using the Bland-Altman method. RESULTS We found significant differences between biometers comparisons (p 0.05), with the same outcomes for medium- and long-eyes. No significant differences were found using the SRK/T, Haigis, or Hoffer Q formulas for short-eyes (p > 0.1). However, Barrett Universal II formula produced significant differences (p < 0.05) and thes…
Graphic representation of data resulting from measurement comparison trials in cataract and refractive surgery.
2003
* BACKGROUND AND OBJECTIVES: The evaluation of new diagnostic measurement devices allows intraindividual comparison with an established standard method. However, reports in journal articles often omit the adequate incorporation of the intraindividual design into the graphic representation. * PATIENTS AND METHODS: This article illustrates the drawbacks and the possible erroneous conclusions caused by this misleading practice in terms of recent method comparison data resulting from axial length measurement in 220 consecutive patients by both applanation ultrasound and partial coherence interferometry. * RESULTS: Graphic representation of such method comparison data should be based on boxplots…
Lexical cohesion revisited. A combined corpus and systemic-functional analysis
2018
In this chapter I argue for a refinement of the classic SFL approach to lexical cohesion. First, a literature overview is provided in which key principles and related categories are examined. In addition, the connection of cohesion and discourse co-herence is addressed and an overview is provided of the wide range of applications that the former has in such fields as genre studies, language teaching and learning, psycholinguistics and computational linguistics, among others. The core SFL models of cohesion are then revisited in order to propose a modified taxonomy of lexical co-hesion, involving five distinct types (repetition, synonymy, opposition, inclusion and association) that are cross…
Student-initiated multi-unit questions in EMI classrooms
2021
This conversation analytic study investigates student-initiated multi-unit questions (MUQs) in whole class interaction. Based on a corpus of 30 hours of videotaped interactions from teacher education classrooms in an English-medium instruction university, we demonstrate that students use MUQs to introduce topics, either by recontextualizing some aspect of the prior topic, or alternatively, without these cohesive ties, which requires more interactional work to achieve intersubjectivity. Findings reveal that MUQs render student professional concerns more relevant and salient, foregrounding those inquiries as a space for launching topics. Students bring up issues such as ways of handling parti…
Coherence in Spoken and Written Discourse
1982
The article discusses two types of discourse coherence, propositional coherence and interactional coherence. These two types are related to the mode of discourse as well as to the level of style in the discourse. It takes up the concept of frame as an organised subsystem of knowledge shared by human beings, and suggests ways in which this concept could be used in studies of coherence in everyday conversations, prose texts and lyrical poetry. The article also suggests a way of describing discourse coherence in terms of the discourse topic and considers the relationship of the two types in different kinds of texts.
The novel structure of the core oligosaccharide backbone of the lipopolysaccharide from the Plesiomonas shigelloides strain CNCTC 8089 (serotype O13)
2013
The new structure of the core oligosaccharide of Plesiomonas shigelloides CNCTC 80/89 (serotype O13) lipopolysaccharide has been investigated by chemical methods, (1)H and (13)C NMR spectroscopy and matrix-assisted laser-desorption/ionization time of flight (MALDI-TOF). It was concluded that the core oligosaccharide of P. shigelloides CNCTC 80/89 is a nonasaccharide with the following structure: The position of glycine was determined by MALDI-TOF MS/MS analyses.
La alegoría en Baudelaire
2020
Interpreto Les fleurs du mal de Baudelaire a partir principalmente de los conceptos ofrecidos por la teoría del arte de Adorno, en un diálogo que busca la coherencia hermenéutica del poeta con las aportaciones para su comprensión de Benjamin, Jauss y Gadamer. Con el horizonte puesto en la relación entre lo artístico y el saber, distingo cuatro constelaciones de sentido en los poemas baudelairianos: la construcción alegórica de la realidad, el poeta autointerpretado como arquitecto, la poética del recuerdo y el spleen, desde cuyos marcos interpretativos esbozo materiales para una posible historia de la belleza en la modernidad. I interpret Les fleurs du mal de Baudelaire mainly from the conc…
Optimized adiabatic passage with dephasing
2008
We study adiabatic population transfer with dephasing in two-level models driven by a chirped driving field. We show that the population transfer is maximized when the dynamics follows specific ellipses as trajectories in the parameter space. We determine the optimal parameters and estimate the losses in a closed form. These estimates show a similar robustness as for the standard lossless adiabatic processes with respect to variations of the parameters.
A wavelet analysis of US fiscal sustainability
2015
Abstract In this paper, we reassess the relationship between primary deficit and lagged debt to GDP ratio (Bohn, 1998), to test for US debt sustainability over the period 1795–2012. Our analysis is rooted in the wavelet domain enabling the detection of interesting patterns and otherwise hidden information. We find evidence of long term fiscal sustainability but only up until 1995 and also we show that governments tend to respond more vigorously to budget deficits when the level of debt is high rather than low.