172,057 research outputs found
The Stolz-Cesàro theorem and its applications
No full textThinking about the need to enhance knowledge about criteria
for the study of numerical sequences efficiently, this work aims to present, in a clear and coherent way, definitions and concepts of convergences already known. Furthermore, complement with the Stolz-Cesàro Theorem and its applications
which are invested in sequence convergence criteria as a further test.
sophisticated and very useful in the analysis of sequence behaviors,
much explored in Mathematics Olympiads. Among the specific objectives
stand out: analyze Stolz's theorem; look for your most usual applications and
extend the study of sequences with a numerical and effective method.Pensando na necessidade de engrandecer o conhecimento acerca de critérios
para o estudo de sequências numéricas com eficiência, este trabalho visa apresen tar de maneira clara e coerente definições e conceitos de convergências já conheci dos. Além disso, complementar com o Teorema de Stolz-Cesàro e suas aplicações
que são investidas a critérios de convergência de sequências como um teste mais
sofisticado e com muita utilidade nas análises de comportamentos de sequências,
muito explorado em Olimpíadas de Matemática. Dentre os objetivos específicos
destacam-se: analisar o teorema de Stolz; buscar suas aplicações mais usuais e
ampliar o estudo de sequências com um método numérico e eficaz
Sur le problème d'évolution de fissure en élastoplasticité : approches primale et duale
No full textAbstract We study the rate boundary value problem concerning crack propagation in an elastoplastic material. The formulation is given when the criterium of propagation is based on a energy release rate. Primal and dual approaches of the boundary value problem of evolution are proposed. To cite this article: C. Stolz, C. R. Mecanique 336 (2008). Résumé La formulation du problème en vitesse de fissure et de déplacement est discutée lorsque le critère de propagation est fondé sur l'analyse de la dissipation. On se place alors dnas le cas de critère énergétique comme proposé (Nguyen, 1985) et généralisé récemment au cas des matériaux élastoplastiques (Stolz, 2008). On obtient alors les formulations primale et duale du problème d'évolution de la propagation de la fissure en élastoplasticité. Pour citer cet article : C. Stolz, C. R. Mecanique 336 (2008). Mots-clés
Spatial dimensions and orientation of objects in Yucatec Maya
No full textStolz C, Boretzky N. Spatial dimensions and orientation of objects in Yucatec Maya. Bochum-Essener Beiträge zur Sprachwandelforschung ; 29. Bochum: Brockmeyer; 1996
The effect of long-wavelength stiffness variation on wear pattern generation
No full textIn many systems with moving contacts spatially periodic wear patterns related to structural resonances emerge. Often, however, the structural properties of file sliding system vary periodically with position. Based on a generic minimal model the present work investigates the effect of a spatially periodic structural stiffness on wear pattern generation. Linear stability of the resulting wear dynamics is analysed using spatial Floquet analysis. It turns out that the emergence of wear patterns by instability can in general not be evaluated through stability analysis based oil spatially local parameters alone. A spatially periodic stiffness can stabilize file system, depending on the wavelength and the amplitude of file spatially periodic parameter variation. The relevance of the effect is discussed and open points are addressed. (C) 2008 Elsevier Ltd. All rights reserved
Stolz (F.), Debrunner (Α.) et Schmid (W. P.). Storia delta lingua latina, trad. ital. de Benedikter (C)
No full textLoicq Jean. Stolz (F.), Debrunner (Α.) et Schmid (W. P.). Storia delta lingua latina, trad. ital. de Benedikter (C). In: Revue belge de philologie et d'histoire, tome 52, fasc. 1, 1974. Antiquité - Oudheid. p. 156
Modeling Reward Learning Under Placebo Expectancies: A Q-Learning Approach
No full textThis repository includes code and data necessary for reproducing the analyses presented in the attached pre-print of the paper "Augustat, N., Chuang, L.-C., Panitz, C., Stolz, C., Müller, E. M., Endres, D.: Modeling Reward Learning Under Placebo Expectancies: A Q-Learning Approach" to appear in the proceedings of CogSci 2022.DFG SFB-TRR 289 "Treatment Expectation", project A07 (project number 422744262
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Mitomycin C in highly myopic eyes - Author reply
No full textOphthalmology. 2005 Feb;112(2):208-18; discussion 219.
Mitomycin C modulation of corneal wound healing after photorefractive keratectomy in highly myopic eyes.
Gambato C, Ghirlando A, Moretto E, Busato F, Midena E.
SourceRefractive Surgery Service and Antimetabolite Therapy Research Unit, Department of Ophthalmology, University of Padova, Padova, Italy.
Abstract
PURPOSE: To evaluate the role of topical mitomycin C in corneal wound healing (CWH) after photorefractive keratectomy (PRK) in highly myopic eyes.
DESIGN: Prospective, double-masked, randomized clinical trial.
PARTICIPANTS: Seventy-two eyes of 36 patients affected by high (>7 diopters) myopia.
METHODS: In each patient, one eye was randomly assigned to PRK with intraoperative topical 0.02% mitomycin C application, and the fellow eye was treated with a placebo. Postoperatively, mitomycin C-treated eyes received artificial tears (3 times daily, tapered in 3 months), whereas the fellow eye was treated with fluorometholone sodium 2% and artificial tears (3 times daily, tapered in 3 months).
MAIN OUTCOME MEASURES: Uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA), contrast sensitivity, manifest refraction, and biomicroscopy. Contrast sensitivity was determined using the Pelli-Robson chart. Corneal confocal microscopy documented CWH.
RESULTS: Mean follow-up was 18 months (range, 12-36). No side effects or toxic effects were documented. At 12-month follow-up examination, UCVAs (logarithm of the minimum angle of resolution) were 0.4+/-0.48 and 0.5+/-0.53 (P = .03) in mitomycin C-treated eyes and corticosteroid-treated eyes, respectively. At 1 year, corneal haze developed in 20% of corticosteroid-treated eyes, versus 0% of mitomycin C-treated eyes. At 12, 24, and 36 months, corneal confocal microscopy showed activated keratocytes and extracellular matrix significantly more evident in untreated eyes (Ps = 0.004, 0.024, and 0.046, respectively).
CONCLUSION: Topical intraoperative application of 0.02% mitomycin C can reduce haze formation in highly myopic eyes undergoing PRK.
Comment in
Ophthalmology. 2006 Feb;113(2):357; author reply 357-8
A set of essential requirements towards standardising the numerical simulation of blast-loaded windows and facades
No full textThe determination of the blast protection level of laminated glass windows and facades is of crucial importance, and it is normally done by using experimental investigations. In recent years numerical methods have become much more powerful also with respect to this kind of application. This report attempts to give a first idea of a possible standardisation concerning such numerical simulations.
Attention is drawn to the representation of the blast loading and of the behaviour of the material of the mentioned products, to the geometrical meshing, as well as to the modelling of the connections of the glass components to the main structure. The need to validate the numerical models against reliable experimental data, some of which are indicated, is underlined
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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