Student teachers' perceptions of the Internet: Motivation, influences, and use

The Internet's rapid growth and diffusion, both worldwide and in Portugal, as well as its importance for teacher education, made the authors feel the need to reflect on how their student teachers integrate themselves in such quite novel environmental conditions and teaching communities This paper reports on one specific Portuguese university's student teachers' Internet usage during their teaching practice and what reasons motivated them to do so. It also looks into student teachers' perceptions about Internet discussion and usage by other teachers in their schools and, in particular, in their own disciplinary groups. The data was collected using a questionnaire which was anonymously answered by 189 of the entire 360-student teacher 2000/2001 population from all 9 different preservice programs

Identification of gifted students by teachers: reliability and validity of the Cognitive Abilities and Learning Scale

Teachers play a relevant role in screening and identifying gifted and talented students. However, many times teacher´s assessments may be biased by personal beliefs about giftedness. In these cases, the quality of screening and identification can be enhanced through the use of measurement devices that present good psychometric properties of validity and reliability. This study presents the examination of the precision and factor validity of the Cognitive Abilities and Learning Scale (CALS: Escala de Habilidades Cognitivas e de Aprendizagem – EHC/A; Almeida, Olivira &Melo, 2000), with a sample of 262 students from fourth and fifth grades. Results suggest the existence of only one factor, not confirming the theoretical model of three factors (intellectual ability, motivation and creativity) that supports the scale. Principal components analysis for three factors shows some problems with item specification for ability and creativity. These problems contrast with high reliability coefficients obtained when arranging items according to the dimension they would theoretically be linked to. These findings suggest the need to include new items with more specificity in terms of the cognitive dimensions of giftedness

Potential inundation of Lisbon downtown by a 1755-like tsunami

In this study, we present 10 m resolution tsunami flooding maps for Lisbon downtown and the Tagus estuary. To compute these maps we use the present bathymetry and topographic maps and a reasonable estimate for the maximum credible tsunami scenario. Tsunami modeling was made with a non-linear shallow water model using four levels of nested grids. The tsunami flood is discussed in terms of flow depth, run-up height and maximum inundation area. The results show that, even today, in spite of the significant morphologic changes in the city river front after the 1755 earthquake, a similar event would cause tsunami flow depths larger than one meter in a large area along the Tagus estuary and Lisbon downtown. Other areas along the estuary with a high population density would also be strongly affected. The impact of the tide on the extent of tsunami inundation is discussed, due to the large amplitude range of the tide in Lisbon, and compared with the historical descriptions of the 1755 event. The results presented here can be used to identify the potential tsunami inundation areas in Lisbon; this identification comprises a key element of the Portuguese tsunami emergency management system

A DFT approach to the surface-enhanced raman scattering of 4-cyanopyridine adsorbed on silver nanoparticles

A Surface-Enhanced Raman Scattering (SERS) spectrum of 4-cyanopyridine (4CNPy) was recorded on silver plasmonic nanoparticles and analyzed by using Density Functional Theory (DFT) calculations. Two simple molecular models of the metal\u20134CNPy surface complex with a single silver cation or with a neutral dimer (Ag+ \u20134CNPy, Ag2 \u20134CNPy), linked through the two possible interacting sites of 4CNPy (aromatic nitrogen, N, and nitrile group, CN), were considered. The calculated vibrational wavenumbers and intensities of the adsorbate and the isolated species are compared with the experimental Raman and SERS results. The analysis of the DFT predictions and the experimental data indicates that 4CNPy adsorbs preferentially on neutral/charged active sites of the silver nanoparticles through the nitrogen atom of the aromatic ring with a perpendicular orientation

"Es necesario secar (δέον αὐχμεῖν) las emociones” (Rep. 606d). Desafíos de/a Platón

This article investigates a few passages from Plato’s Republic in order to uncover certain assumptions and consequences of the philosopher’s argument about the status of emotions, which culminates in the incisive and radical statement in book X, “It is necessary to dry the emotions” (Rep.606d). According to Plato, emotions lead men to act irrationally and in a cowardly manner, especially citizens who become accustomed to poetry, particularly drama, which arouses the passions. Rather than analyzing the philosopher’s criticism of the value of theater and the expression of pain (such as lamentation and crying), I shall examine a contemporary case: the funeral of actor Jean-Paul Belmondo which was held by the French government amidst the SARSCoV-2 pandemic crisis. Through this approach I shall reassess the role of emotion in the education of citizens and the political strengthening of a city or a group.Este artículo investiga algunos pasajes de la República de Platón para comprender algunos presupuestos y consecuencias de la argumentación del filósofo sobre el estatus de las pasiones, que culmina con la incisiva y radical afirmación, en el libro X, de que “es necesario secar las emociones” (Rep. 606d). Ello se debe a que, según Platón, ellas conducen a los hombres a actuar de forma irracional y cobarde, especialmente a aquellos ciudadanos que se acostumbran a la poesía, especialmente la dramática, que incita a las pasiones. Frente a la crítica del filósofo al valor del teatro y a las expresiones de dolor (como el lamento y el llanto), propongo revalorizar el papel de la emoción en la formación del ciudadano y el fortalecimiento político de un grupo, tomando un caso contemporáneo: la ceremonia fúnebre realizada por el gobierno francés con motivo de la muerte del actor Jean-Paul Belmondo, en el contexto de la crisis pandémica de SARS-CoV-2

Rammed earth: feasibility of a global concept applied locally

Rammed earth is an ancient building technique that has been continuously reinvented in the dynamic movement of people all over the world, where it has been used to build from dwellings to enormous fortresses and city walls. In the particular case of Portugal, the inhabitants have been closely related to earth construction. From one region to another, rammed earth, adobe and wattle-and-daub buildings are frequently found. The rammed earth construction is mainly found in the southern part of Portugal and is almost absent from the north. However, the relatively low seismic hazard of the north of Portugal plus the sustainability of earth as a building material encourages the development of this technique in the region. The suitability of the typical granite residual soils from the Minho region for rammed earth construction was assessed by means of an experimental program, in which three representative soils were subjected to expeditious and laboratory tests that evaluated the characteristics of the soils and the performance of rammed earth built with them. The results showed that the granite residual soils tested fulfil most of the requirements needed for rammed earth construction, being the low compressive strength its main limitation. In this way, an innovative and sustainable stabilization technique based on alkaline activation of fly ash is proposed

Boreholes plans optimization methodology combining geostatistical simulation and simulated annealing

Nowadays, the prospection plans have the difficult task of ensuring a more complete and rich characterization of the rock mass for the purpose of optimizing costs and increasing safety in geotechnical projects. Currently, boreholes location and depth are mainly defined based on experience and know-how of professionals, as such, it is user-dependent. Hence, there is a lack of methodologies to help the decision-makers in defining the optimal location of boreholes (with relevant information). Therefore, this paper presents a methodology based on the use of geostatistical conditional simulation allied to a stochastic global optimization algorithm (Simulated Annealing) to develop optimized boreholes plans comparing a uni-objective and a multi-criteria optimization approaches. In this work, the optimized location is considered the one that minimizes uncertainty translated by either the average local variance or the average width of 95% probability intervals of simulated values at unsampled locations. This methodology was applied using preliminary information obtained from previously executed boreholes using as variable the empirical rock mass classification system, Rock Mass Rating, in a Chilean deposit.This research is inserted in LNEC project named P2I-RockGeoStat and was partially funded by FCT (Fundação para a Ciência e Tecnologia, Portugal) in the scope of project PEst-UID/CEC/00319/2013, included in ISISE project UID/ECl/04029/2013 as well as the PhD grant SFRH/BD/89627/2012, and by the Chilean Commission for Scientific and Technological Research, through Project CONICYT PIA Anillo ACT1407.info:eu-repo/semantics/publishedVersio

Tsunami vulnerability assessment of Casablanca-Morocco using numerical modelling and GIS tools

Earthquakes and tsunamis along Morocco's coasts have been reported since historical times. The threat posed by tsunamis must be included in coastal risk studies. This study focuses on the tsunami impact and vulnerability assessment of the Casablanca harbour and surrounding area using a combination of tsunami inundation numerical modelling, field survey data and geographic information system. The tsunami scenario used here is compatible with the 1755 Lisbon event that we considered to be the worst case tsunami scenario. Hydrodynamic modelling was performed with an adapted version of the Cornell Multigrid Coupled Tsunami Model from Cornell University. The simulation covers the eastern domain of the Azores-Gibraltar fracture zone corresponding to the largest tsunamigenic area in the North Atlantic. The proposed vulnerability model attempts to provide an insight into the tsunami vulnerability of building stock. Results in the form of a vulnerability map will be useful for decision makers and local authorities in preventing the community resiliency for tsunami hazards

Borehole plan optimization in rock masses using geostatistical simulation

The economical and safety aspects related with geotechnical engineering, in detail with prospecting works, are significant and increasingly complex. Therefore, optimizing costs that simultaneously guarantee the quantity and quality of information to characterize the rock mass are, nowadays, one of the most important factors in underground works. The borehole plans, normally defined using the knowhow of a professional, imply large costs in the geotechnical industry, thus this paper presents a new methodology allowing the optimization of such plans. This methodology allies geostatistical techniques (turning bands simulation to model rock mass properties like the Rock Mass Rating or RMR) with a stochastic global optimization algorithm, Simulated Annealing (SA). It relies on sparse information about RMR and randomly generates new points that intend to represent possible locations for additional boreholes. Furthermore, SA is adapted to perform the optimization of a set of points with different depth coordinates in order to represent the reality of the mechanical boreholes, where the information is obtained along the hole. Considering the number of additional boreholes to drill, SA finds a global solution minimizing an objective function, which aims at quantifying the uncertainty on RMR at locations without information. An application to a gold mine deposit located in Chile is finally presented in order to illustrate and validate the methodology.Agência de Desenvolvimento Económico do Chile através do projeto Innova Chile-CORFO 11IDL2-10630Comissão Científica e Tecnológica de Investigação chilena através dos projetos CONICYT / FONDECYT / REGULAR / N°1130085 e CONICYT PIA Anillo ACT 1407P2I-RockGeoStat do LNE