207,782 research outputs found
A school reentry program to help student and teacher reengagement after the Covid lockdown
No full textStudent and Teacher Evaluation of a School Reentry Programme Following the Initial Covid19 Lockdown in Italy.
The Covid19 pandemic raised concerns regarding millions of children’s mental health. For schools, the real challenge has been how to manage the situation in terms of continuing education and development. This investigation was carried out to evaluate a school reentry programme that supported teachers and students with activities aimed at processing emotions and lockdown experiences in their classrooms.
In September 2020, after the first lockdown in Italy was over, the programme was delivered by 54 different teachers (90% female) to 911 students (mean age 7.8, SD 3.5, 48.8% female, 72 % primary school, 28% middle school) in the Umbria region in Italy.
To evaluate the activities, we employed a descriptive study design with data collection at two points in time: T0, before commencing the activities, and T1, after finishing them. To assess their anxiety and emotional state, students completed the PANAS-C and the STAI-C questionnaire. Additionally, students and teachers retrospectively completed an ad hoc appreciation questionnaire, comprised of Likert-type and open-ended questions.
Wilcoxon tests showed that the programme was significantly associated with a concomitant decrease in STAI (Z = -3.57; p < .001; r = .16) and PANAS-C negative emotions (Z = -5.95; p < .001; r = .27). No statistical significative differences in positive emotions were detected.
Qualitative results showed that teachers appreciated the chances to emotionally listen to their students and provide them with coping and community empowerment activities, while children liked and welcomed the chance to draw and tell about their lockdown experience. Taken together, these results show that a tailored school reentry programme can play an important role in fostering resilience and development in schools during a crisis
Perspectives on institutional change - water management in Europe
No full textCONTENTS: Mapping institutional change... 3, Insa Theesfeld, Frauke Pirscher; Affordability as an institutional obstacle to water-related price reforms... 9, Erik Gawel, Wolfgang Bretschneider; Analysing the shortcomings of the Ukrainian urban waste water sector - Institutional options for modernisation ... 35, Herwig Unnerstall, Nina Hagemann; Gemeinschaftsgüter und Gemeinwohl - Theoretischer Erkenntnisgehalt und praktische Relevanz für die Regionalentwicklung am Beispiel von Wasserinfrastrukturen und Kulturlandschaften ... 55, Andreas Röhring, Timothy Moss, Ludger Gailing, Rita Gudermann; Explaining top-down institutional design: The introduction of River Basin Management in Portugal... 85, Andreas Thiel, Catrin Egerton; Decentralization failures in post-socialist fishery management ... 107, Insa Theesfeld, Oscar Schmidt --
Epoxy–amine/metal interphases: Influences from sharp needle-like crystal formation
No full textWhen epoxy–amine liquid mixtures are applied onto metallic oxide layer, concomitant amine chemical sorption and metallic surface dissolution appear leading to the organo-metallic complex formation. We studied the interphase formation and used two different amines as hardener (isophoronediamine (IPDA) and diethylenetriamine (DETA)). If the complex concentration within the liquid amine or epoxy–amine prepolymer is higher than its solubility limit, complexes crystallize. Sharp needle-like crystals are observed only with modified IPDA. For Al-IPDA crystals, the melting point is about 78°C, but as the network is formed at this temperature, crystals remain present at the end of the polymerization cycle
Precipitation of niobium carbonitrides in ferrite: chemical composition measurements and thermodynamic modelling
No full textHigh-resolution transmission electron microscopy and electron-energy loss spectroscopy have been used to characterize the structure and chemical composition of niobium carbonitrides in the ferrite of a Fe–Nb–C–N model alloy at different precipitation stages. Experiments seem to indicate the coexistence of two types of precipitates: pure niobium nitrides and mixed substoichiometric niobium carbonitrides. In order to understand the chemical composition of these precipitates, a thermodynamic formalism has been developed to evaluate the nucleation and growth rates (classical nucleation theory) and the chemical composition of nuclei and existing precipitates. A model based on the numerical solution of thermodynamic and kinetic equations is used to compute the evolution of the precipitate size distribution at a given temperature. The predicted compositions are in very good agreement with experimental results
Effect of surfactants on liquid side mass transfer coefficients
No full textIn the present paper, the effect of liquid properties (surfactants) on bubble generation phenomenon, interfacial area and liquid side mass transfer coefficient was investigated. The measurements of surface tension (static and dynamic methods), of Critical Micelle Concentration (CMC) and of characteristic adsorption parameters such as the surface coverage ratio at equilibrium (se) were performed to understand the effects of surfactants on the mass transfer efficiency. Tap water and aqueous solutions with surfactants (cationic and anionic) were used as liquid phases and an elastic membrane with a single orifice as gas sparger. The bubbles were generated into a small-scale bubble column. The local liquid side mass transfer coefficient (kL) was obtained from the volumetric mass transfer coefficient (kLa) and the interfacial area (a) was deduced from the bubble diameter (DB), the bubble frequency (fB) and the terminal bubble rising velocity (UB). Only the dynamic bubble regime was considered in this work (ReOR = 150 - 1000 and We = 0.002 - 4). This study has clearly shown that the presence of surfactants affects the bubble generation phenomenon and thus the interfacial area (a) and the different mass transfer parameters, such as the volumetric mass transfer coefficient (kLa) and the liquid-side mass transfer coefficient (kL). Whatever the operating conditions, the new kLa determination method has provided good accuracy without assuming that the liquid phase is perfectly mixed as in the classical method. The surface coverage ratio (se) proves to be crucial for predicting the changes of kL in aqueous solutions with surfactants
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
Alterações fenotípicas e genéticas do metabolismo do ferro numa população portuguesa com doença de Alzheimer: potenciais implicações no conhecimento da fisiopatologia e no diagnóstico desta demência
No full textFundação Astrazeneca e INSA, I.P
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
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
Grape cane extracts: an opportunity for the development of novel additives for food Chilean industry
No full textPodeu consultar el III Workshop anual INSA-UB complet a: http://hdl.handle.net/2445/118993Sessió 2. Pòster núm. 1
- …
