bluuebunny/crossref_metadata_2025 huggingface dataset:
Using Asynchronous Activities to Promote Sense of Community and Learning in an Online Course
Authors: Trespalacios Jesús , Rand Jennifer
Published: June 2015

The purpose of this case study was to explore three asynchronous communication activities with graduate students in an online course. Asynchronous discussions transcripts, a sense of community survey, and a course evaluation questionnaire were used to collect and analyze data. The results of this study may have implications for an effective design of asynchronous communication and interactions between student and instructor, student and student, and students and content. Results indicate that well-designed asynchronous activities can help to promote sense of community among online students. Implications and challenges in implementing asynchronous activities to foster sense of community and learning in an online learning environment are also discussed.
Students' Joint Reasoning about Gas Solubility in Water in Modified Versions of a Virtual Laboratory
Authors: Karlsson Göran
Published: June 2015

Laboratory work in science education is essential for students' conceptual understanding of natural phenomena. Computer-simulated laboratory experiments have been proposed to facilitate traditional laboratory work. A virtual laboratory was designed to enable students to collaboratively discover the concept of gas solubility in water at different physiological conditions. The virtual laboratory was developed through a design experiment involving three successive versions with different guiding structures. Analysis of 12 dyads' reasoning about gas solubility in water revealed that the problem was not primarily for the students to realise how the volume of gas changed, but rather to understand the concept of solubility of gases. It was also observed how the guiding structures within the three different versions influenced the students' reasoning about the concept. The analysis indicates that the affordances of virtual laboratories might, to a certain extent, enhance joint discovery of a scientific concept.
Intra-ocular pressure measurements using the Ocular Response Analyser and ICare tonometer: A comparison
Authors: Gillan Wayne D.H.
Published: June 2015

The accurate measurement of intra-ocular pressure (IOP) is an important procedure in the detection and treatment of glaucoma. The Ocular Response Analyser (ORA) and the ICare rebound tonometer are two recent additions to the instruments available to eye care practitioners for the measurement of IOP. The present study investigated whether the ORA and the ICare tonometer can be used interchangeably. Twenty-eight subjects had three measures of IOP taken using the two instruments. The ORA provides two different measures of IOP – Goldmann and cornea compensated IOP – whilst the ICare tonometer provides IOP only. The results of this study suggest that only the ORA Goldmann and ICare IOP measures are comparable. In general, it is advisable not to use the ORA and ICare tonometers interchangeably.
Assessing employability capacities and career adaptability in a sample of human resource professionals
Authors: Coetzee Melinde , Ferreira Nadia , Potgieter Ingrid L.
Published: June 2015

Orientation: Employers have come to recognise graduates’ employability capacities and their ability to adapt to new work demands as important human capital resources for sustaining a competitive business advantage.Research purpose: The study sought (1) to ascertain whether a significant relationship exists between a set of graduate employability capacities and a set of career adaptability capacities and (2) to identify the variables that contributed the most to this relationship.Motivation for the study: Global competitive markets and technological advances are increasingly driving the demand for graduate knowledge and skills in a wide variety of jobs. Contemporary career theory further emphasises career adaptability across the lifespan as a critical skill for career management agency. Despite the apparent importance attached to employees’ employability and career adaptability, there seems to be a general lack of research investigating the association between these constructs.Research approach, design and method: A cross-sectional, quantitative research design approach was followed. Descriptive statistics, Pearson product-moment correlations and canonical correlation analysis were performed to achieve the objective of the study. The participants (N = 196) were employed in professional positions in the human resource field and were predominantly early career black people and women.Main findings: The results indicated positive multivariate relationships between the variables and showed that lifelong learning capacities and problem solving, decision-making and interactive skills contributed the most to explaining the participants’ career confidence, career curiosity and career control.Practical/managerial implications: The study suggests that developing professional graduates’ employability capacities may strengthen their career adaptability. These capacities were shown to explain graduates’ active engagement in career management strategies deemed important for their sustained employability in the contemporary career environment.Contributions: The results of the study offered empirical evidence in support of theoretical views on the self-regulatory capacities underpinning individuals’ career adaptability and how these are influenced by their employability capacities.
Numerical Simulation of Rarefied Gas Flows with Specified Heat Flux Boundary Conditions
Authors: Meng Jianping , Zhang Yonghao , Reese Jason M.
Published: June 2015

We investigate unidirectional rarefied flows confined between two infinite parallel plates with specified heat flux boundary conditions. Both Couette and force-driven Poiseuille flows are considered. The flow behaviors are analyzed numerically by solving the Shakhov model of the Boltzmann equation. We find that a zero-heat-flux wall can significantly influence the flow behavior, including the velocity slip and temperature jump at the wall, especially for high-speed flows. The predicted bimodal-like temperature profile for force-driven flows cannot even be qualitatively captured by the Navier-Stokes-Fourier equations.
Golden Section Search Based Optimization of Road Vehicle Suspension System
Authors: Bali Prasad , Chandrashekara C.V.
Published: June 2015

Suspension system is an important part of a vehicle which connects the road wheels and vehicle body. The major function of suspension is to isolate vehicle body from road disturbances. The design of suspension system is generally a compromise between many design requirements that aim to provide a comfortable ride and good vehicle handling. An optimization technique is used to choose the suspension parameters that meet these design requirements. In this present work a two degree of freedom quarter car vehicle vibration model is considered for optimization. Sprung mass acceleration and relative displacement of quarter car are considered as the measure of ride comfort and vehicle handling respectively. Golden section search optimization technique is used for single objective optimization of quarter car considering sprung mass acceleration as objective function and relative displacement as constraint. It is noticed that the accuracy level in getting the optimized value using this approach is comparatively high and reliable..
Design Evolution of Drive Booster Configuration for Terrain Vehicles
Authors: Janardhana Raju G. , Srinivasulu Reddy K. , Venkatachalapathi N
Published: June 2015

This paper presents the design evolution of drive booster configuration for terrain vehicle to manoeuvre over the roads covered with mud or snow. The proposed design of booster consisted small number of parts whose sizing is accomplished through design calculations. The intended system will take power from engine to do so but in petite proportion. The booster increases the moment of inertia through increment in angular speed of terrain vehicle. Structural design adequacy is assessed using ANSYS commercial finite element analysis software. Available safety margin is extracted through static analysis. The severance of first natural frequency of the intended booster system is ascertained from that of engine by carrying out modal analysis.
Remote sensing the sea surface CO2 of the Baltic Sea using the SOMLO methodology
Authors: Parard G. , Charantonis A. A. , Rutgerson A.
Published: June 2015

Abstract. Studies of coastal seas in Europe have noted the high variability of the CO2 system. This high variability, generated by the complex mechanisms driving the CO2 fluxes, complicates the accurate estimation of these mechanisms. This is particularly pronounced in the Baltic Sea, where the mechanisms driving the fluxes have not been characterized in as much detail as in the open oceans. In addition, the joint availability of in situ measurements of CO2 and of sea-surface satellite data is limited in the area. In this paper, we used the SOMLO (self-organizing multiple linear output; Sasse et al., 2013) methodology, which combines two existing methods (i.e. self-organizing maps and multiple linear regression) to estimate the ocean surface partial pressure of CO2 (pCO2) in the Baltic Sea from the remotely sensed sea surface temperature, chlorophyll, coloured dissolved organic matter, net primary production, and mixed-layer depth. The outputs of this research have a horizontal resolution of 4 km and cover the 1998–2011 period. These outputs give a monthly map of the Baltic Sea at a very fine spatial resolution. The reconstructed pCO2 values over the validation data set have a correlation of 0.93 with the in situ measurements and a root mean square error of 36 μatm. Removing any of the satellite parameters degraded this reconstructed CO2 flux, so we chose to supply any missing data using statistical imputation. The pCO2 maps produced using this method also provide a confidence level of the reconstruction at each grid point. The results obtained are encouraging given the sparsity of available data, and we expect to be able to produce even more accurate reconstructions in coming years, given the predicted acquisition of new data.
Late Viséan (late Mississippian) ammonoids from the Barnett Shale, Sierra Diablo Escarpment, Culberson County, Texas, USA
Authors: Titus A. L. , Korn D. , Harrell J. E. , Lambert L. L.
Published: June 2015

Abstract. Mid-Carboniferous strata of the Barnett Shale in the Sierra Diablo region are deep water, offshore sediments deposited in the Marathon Foreland Basin. These strata contain a remarkably complete ammonoid record spanning from the Late Viséan to the middle Atokan (Moscovian). Late Viséan strata are referred to as the "Folks Member" of the Barnett Shale and locally yield numerous ammonoids. Three assemblages can be recognized, which contain, from oldest to youngest, Goniatites eganensis and Girtyoceras hamiltonense (Goniatites eganensis Zone), Goniatites multiliratus and Girtyoceras meslerianum (Goniatites multiliratus Zone), and Choctawites cumminsi and Pachylyroceras cloudi (Choctawites cumminsi Zone). We erect the new genera Choctawites and Uralyroceras to accommodate, respectively, the North American species "Goniatites choctawensis Shumard, 1863", "G. kentuckiensis Miller, 1889" and "G. cumminsi Hyatt, 1893", and Uralian species formerly attributed to Pachylyroceras. For the material of "Pachylyroceras cloudi" of the South Urals, the new species name Uralyroceras arquatum is proposed.
ICON–ART 1.0 – a new online-coupled model system from the global to regional scale
Authors: Rieger D. , Bangert M. , Bischoff-Gauss I. , Förstner J. , Lundgren K. , Reinert D. , Schröter J. , Vogel H. , Zängl G. , Ruhnke R. , Vogel B.
Published: June 2015

Abstract. We present the first stage of a new online-coupled global to regional-scale modeling framework for the simulation of the spatiotemporal evolution of aerosols and trace gases. The underlying meteorological model is the new nonhydrostatic model system ICON (ICOsahedral Nonhydrostatic) which allows a local grid refinement with two-way interactions between the grids. We develop the extension ART (Aerosol and Reactive Trace gases) with the goal of simulating interactions between trace substances and the state of the atmosphere. Within this paper, we present the basic equations and give an overview of the physical parameterizations as well as numerical methods we use. First applications of the new model system for trace gases, monodisperse particles and polydisperse particles are shown. The simulated distribution of two very short-lived substances (VSLS), bromoform (CHBr3) and dibromomethane (CH2Br2) reflecting the fast upward transport shows a good agreement with observations and previous model studies. Also, the shape of the simulated tropical profiles is well reproduced. As an example for the treatment of monodisperse particles we present the simulated ash plume of the Eyjafjallajökull eruption in April 2010. Here, a novel approach for the source function is applied. The pattern of the simulated distribution of volcanic ash particles shows a good agreement with previous studies. As an example for the treatment of a polydisperse aerosol, where number densities and mass concentrations are accounted for, we simulated the annual emissions of sea salt. We obtain a total emission flux of 26.0 Pg yr−1 and an emission flux of particles with diameter less than 10 μm of 7.36 Pg yr−1.
Changes in the occurrence of rainfall-induced landslides in Calabria, Southern Italy, in the 20th century
Authors: Gariano S. L. , Petrucci O. , Guzzetti F.
Published: June 2015

Abstract. We exploit a catalogue of 1466 rainfall events with landslides in the 90 year period 1921–2010 to study temporal and geographical variations in the occurrence of landslides in Calabria, Southern Italy. We use daily rainfall records obtained by a network of 318 rain gauges to reconstruct 448 493 rainfall events. Combining the rainfall and the landslide information, we obtain a catalogue of 1466 rainfall events with landslides (REL) in Calabria from 1921 to 2010, where a REL is the occurrence of one or more landslide during or immediately after a rainfall event. We find that the geographical and the temporal distributions of the rainfall-induced landslides have changed in the observation period. The average and the maximum values of the cumulated event rainfall that have resulted in landslides in the recent-most 30 year period 1981–2010 are lower than the values necessary to trigger landslides in previous periods, whereas the duration of the rainfall events that triggered landslides has remained the same. This can be considered evidence of variations in rainfall conditions, but also an increase in the vulnerability of the territory. We further find that the yearly distribution of rainfall-induced landslides has changed in the observation period, analysing the variations in the number of rainfall events with landslides occurred in each month in three 30 year periods. To investigate variations in the impact of REL on the population, we compared the number of REL in each of the 409 municipalities in Calabria, with the size of the population in the municipalities, measured by national Censuses conducted in 1951, 1981, and 2011. For the purpose, we adopted two strategies. The first strategy considered impact as IREL = #REL/P and the second strategy measured impact as RREL = #REL × P, where #REL is the total number of REL in a period, and P is the size of the population in the same period and geographical area. Considering the entire observation period, IREL and RREL have both increased in Calabria. However, considering the changes between the recent period 1981–2010 and the previous period 1951–1980, results are more variegated with a number of municipalities where IREL and RREL have increased, or decreased. Municipalities where IREL has increased are mainly in the mountains, and municipalities where RREL has increased are mainly along the coasts.
Seeking for key meteorological parameters to better understand Hector
Authors: Gentile S. , Ferretti R.
Published: June 2015

Abstract. Twelve Hector events, a storm developing in the northern Australia, are analyzed to the aim of identifying the main meteorological parameters involved in the convective development. Based on Crook's ideal study \\citep{Crook} wind speed and direction, wind shear, water vapor, Convective Available Potential Energy and type of convection are the parameters used for this analysis. Both European Centre for Medium-Range Weather Forecasts (ECMWF) analysis and high resolution simulations from the Fifth-Generation Mesoscale Model (MM5) are used. The MM5 simulations are used to connect the mean vertical velocity to the total condensate at the maximum stage and to study the dynamics of the storms. The ECMWF analysis are used to evaluate the initial conditions and the environmental fields contributing to Hector development. The analysis suggests that the strength of convection is largely contributing to the vertical distribution of hydrometeors. The role of total condensate and mean lifting vs. low level moisture, Convective Available Potential Energy, surface wind and direction is analyzed for shear and no-shear conditions to evaluate the differences between type A and B for real events. Results confirm the tendency suggested by Crook's analysis. On the other hand, Crook's hypothesis of low level moisture as the only parameter that differentiates between type A and B can be applied only if the events develop in the same meteorological conditions. Crook's tests also helped to asses how the the meteorological parameters contribute to Hector development in terms of percentage.
Dynamics of turbulence under the effect of stratification and internal waves
Authors: Druzhinin O. A. , Ostrovsky L. A.
Published: June 2015

Abstract. The objective of this paper is to study the dynamics of small-scale turbulence near a pycnocline, both in the free regime and under the action of an internal gravity wave (IW) propagating along a pycnocline, using direct numerical simulation (DNS). Turbulence is initially induced in a horizontal layer at some distance above the pycnocline. The velocity and density fields of IWs propagating in the pycnocline are also prescribed as an initial condition. The IW wavelength is considered to be larger by the order of magnitude as compared to the initial turbulence integral length scale. Stratification in the pycnocline is considered to be sufficiently strong so that the effects of turbulent mixing remain negligible. The dynamics of turbulence is studied both with and without an initially induced IW. The DNS results show that, in the absence of an IW, turbulence decays, but its decay rate is reduced in the vicinity of the pycnocline, where stratification effects are significant. In this case, at sufficiently late times, most of the turbulent energy is located in a layer close to the pycnocline center. Here, turbulent eddies are collapsed in the vertical direction and acquire the "pancake" shape. IW modifies turbulence dynamics, in that the turbulence kinetic energy (TKE) is significantly enhanced as compared to the TKE in the absence of IW. As in the case without IW, most of the turbulent energy is localized in the vicinity of the pycnocline center. Here, the TKE spectrum is considerably enhanced in the entire wave-number range as compared to the TKE spectrum in the absence of IW.
Assessment of an ensemble system that assimilates Jason-1/Envisat altimeter data in a probabilistic model of the North Atlantic ocean circulation
Authors: Candille G. , Brankart J.-M. , Brasseur P.
Published: June 2015

Abstract. A realistic circulation model of the North Atlantic ocean at 0.25° resolution (NATL025 NEMO configuration) has been adapted to explicitly simulate model uncertainties. This is achieved by introducing stochastic perturbations in the equation of state to represent the effect of unresolved scales on the model dynamics. The main motivation for this work is to develop ensemble data assimilation methods, assimilating altimetric data from past missions Jason-1 and Envisat. The assimilation experiment is designed to provide a description of the uncertainty associated with the Gulf Stream circulation for years 2005/2006, focusing on frontal regions which are predominantly affected by unresolved dynamical scales. An ensemble based on such stochastic perturbations is first produced and evaluated using along-track altimetry observations. Then each ensemble member is updated by a square root algorithm based on the SEEK (singular evolutive extended Kalman) filter (Brasseur and Verron, 2006). These three elements – stochastic parameterization, ensemble simulation and 4-D observation operator – are then used together to perform a 4-D analysis of along-track altimetry over 10-day windows. Finally, the results of this experiment are objectively evaluated using the standard probabilistic approach developed for meteorological applications (Toth et al., 2003; Candille et al., 2007). The results show that the free ensemble – before starting the assimilation process – correctly reproduces the statistical variability over the Gulf Stream area: the system is then pretty reliable but not informative (null probabilistic resolution). Updating the free ensemble with altimetric data leads to a better reliability with an information gain of around 30% (for 10-day forecasts of the SSH variable). Diagnoses on fully independent data (i.e. data that are not assimilated, like temperature and salinity profiles) provide more contrasted results when the free and updated ensembles are compared.
Metodologias que estimulam o compartilhamento de conhecimento: a experiência do Global Forum América Latina - GFAL
Authors: Drago Isabela , Sato Karoline Aparecida Scroch , Ribeiro Maxiliano , Silva Helena de Fátima Nunes
Published: June 2015

Introdução. Investiga a contribuição das metodologias utilizadas no Global Forum America Latina (GFAL) como forma de compartilhamento de conhecimento, empregando a Investigação Apreciativa (IA) e a Facilitação Gráfica. Identifica a importância do ambiente para o compartilhamento, a importância da externalização do conhecimento e os fatores que facilitam o compartilhamento. Método. Realiza uma pesquisa descritiva com abordagem qualitativa, a partir de questionários aplicados aos coordenadores da área de Desenvolvimento Organizacional da Federação das Indústrias do Estado do Paraná, promotora do evento no Brasil, e da análise da documentação relativa às metodologias utilizadas. Resultados. Caracterizou-se o ambiente de pesquisa e, com base na tabulação dos dados obtidos pelo questionário, procedeu-se a análise sob as seguintes categorias: importância do ambiente, externalização do conhecimento, fatores facilitadores e as metodologias como facilitadoras do compartilhamento de experiências. Conclusões. A Investigação Apreciativa (IA) pode ser considerada uma metodologia que facilita a construção de ambiente favorável (ba) para a criação de conhecimento assim como a Facilitação Gráfica contribui diretamente no processo de compartilhamento, pois facilita a explicitação dos conhecimentos.
Plano estratégico para o ambiente acadêmico: estudo de caso em grupo de pesquisa da Universidade Federal do Paraná
Authors: Greef Ana Carolina , Costa Francisco Daniel De Oliveira , Castilho Junior Newton Corrêa de
Published: June 2015

Introdução. A competição entre concorrentes atuantes no ambiente acadêmico tem características distintas daquela entre agentes inseridos no mercado competitivo organizacional. Os objetivos estratégicos da primeira categoria de concorrentes referem-se à visibilidade e ao posicionamento no mercado de pesquisadores, grupos de pesquisa, Universidades. Assim, a aplicação de um plano estratégico ao Grupo de Pesquisa Aplicada em Ciência, Informação e Tecnologia (GP-CIT), poderá - potencialmente - agregar valor a processos e decisões neste ambiente. Método. Pesquisa aplicada envolvendo os seguintes passos: caracterização do ambiente; identificação da principal demanda em relação tipo de planejamento e voltada para a definição do foco; síntese do posicionamento do ambiente frente a seu mercado de atuação; diagnóstico de fatores internos e externos; detalhamento da competência central; definição de direcionamento estratégico; esboço da estratégia nos níveis de negócios, colaboração e crescimento. Resultados. As características da cultura interna e externa do GP-CIT são favoráveis à realização do planejamento estratégico com vistas a reforçar o potencial de recursos, competências e oportunidades. Tais aspectos fundamentaram o delineamento da direção estratégica a ser seguida pelo Grupo no ambiente acadêmico, com foco em uma visão de longo prazo e apoio em missão, objetivos e valores de negócio. Estratégias de diferenciação, colaboração e crescimento foram formuladas conforme objetivos de atuação do GP-CIT no ambiente acadêmico, considerando-se a dinâmica competitiva a ele inerente. Conclusões. A implementação das estratégias deve seguir passos cautelosos e decisões bem fundamentadas, agregando perspectivas sólidas e competitivas à atuação. O pensamento estratégico, enquanto visão holística, passa a ser inserido na cultura do Grupo de maneira a modificar não apenas processos a ele relacionados, mas todo o paradigma de atividades e competições no ambiente acadêmico.
A difusão vertical na web social: o caso de "Heaven Can Wait" no Antville
Authors: Costa João Pedro da
Published: June 2015

Introdução: Procede a uma análise textual da fruição participativa do Antville, a mais antiga e maior comunidade virtual de fãs do formato videomusical, à Heaven Can Wait de Charlotte Gainsbourg & Beck (2009). Método: Utiliza uma aplicação da teoria fundamentada em dados ao método etnográfico. Resultados: Os resultados principais da análise passam pelo enquadramento da referida praxis dos membros do Antville num tipo de fruição participativa “forense” geradora de uma forma eloquente de inteligência coletiva que, motivada por características producentes do texto videomusical. Conclusões: A estrutura verificada desencadeia um tipo de difusão passível de ser conceptualizada como “vertical”, isto é, como uma forma complementar das práticas difusoras “horizontais” mais comuns na Web Social (disseminação e propagação).
Metodologia design thinking no projeto de software para mobilidade urbana: relato de aplicação
Authors: Lima Adailton Magalhaes , Alves Antonia Tamires , Costa Anderson Jorge Serra da , Sales Ernani De Oliveira
Published: June 2015

Introdução: Apresenta um relato da condução de um estudo onde se aplicou a metodologia Design Thinking no contexto do projeto de uma solução de software ao contexto de mobilidade urbana. Método: Dentre as técnicas sugeridas pela metodologia Design Thinking, este trabalho utilizou entrevistas, surveys, brainstorming e prototipação. O foco do estudo foram os transportes públicos e os processos intrínsecos a esse contexto. Resultados: Tem-se um projeto de solução aderente aos problemas identificados nas pesquisas de campo, e também uma avaliação conduzida com os usuários alvo sobre o projeto de solução proposto. Conclusão: A aplicação de Design Thinking pode ser eficiente no desenvolvimento de software, pois se tem nessa metodologia um direcionamento na elaboração de projetos centrada na construção de produtos voltados para atender as necessidades de seus usuários, ou seja, projeta-se a solução com base no quão usual o produto será para o usuário final.
A PERCEPÇÃO DOS PRATICANTES DE ATIVIDADE FÍSICA SOBRE A QUALIDADE AMBIENTAL SONORA DOS PARQUES PÚBLICOS DE CURITIBA-PARANÁ
Authors: Szeremeta Bani , Zannin Paulo Henrique
Published: June 2015

O objetivo desta pesquisa foi analisar a percepção dos praticantes de atividade física sobre a qualidade ambiental sonora dos parques públicos de Curitiba – Paraná. Foram selecionados quatro parques: três destes localizados muito próximos e/ou cercados por vias de intenso tráfego de veículos e um situado em região mais tranquila, o qual foi considerado como área controle.  Foram realizadas 328 entrevistas com os usuários destas áreas (82 em cada parque), medições acústicas e mapeamento acústico. Confirmou-se a grande influência do ruído do tráfego intenso de veículos no ambiente sonoro dos parques, onde a maioria dos pontos e regiões que apresentam níveis sonoros que excederam o limite imposto pela lei municipal de Curitiba (55 dB[A]) estão no perímetro dos parques, próximos das vias de grande movimentação. Como esperado apenas a área controle apresentou valor médio de nível de pressão sonora de acordo com a legislação local e uma boa qualidade do ambiente sonoro conforme a percepção dos usuários. Também foram identificadas outras condições no ambiente, além dos níveis de pressão sonora e forma urbana do entorno, que interferem conjuntamente na paisagem sonora dos parques e na sua percepção pelos frequentadores, tais como: o grau de incômodo ao ruído de trânsito, os tipos de sons que integram a paisagem sonora, a paisagem visual, as expectativas dos usuários aos sons, e os locais das estruturas dos equipamentos de lazer e atividade física.
AS PINTURAS RUPESTRES NA REGIÃO DE PIRAÍ DA SERRA, PARANÁ
Authors: Oliveira Fernanda Cristina Pereira de , Oka-Fiori Chisato , Melo Mário Sérgio de , Parellada Claudia Inês
Published: June 2015

O presente trabalho desenvolveu-se na região de Piraí da Serra. Essa área está localizada na região fitogeográfica dos Campos Gerais do Paraná, que devido à sua geologia e geomorfologia peculiar, proporcionou em tempos passados a ocupação de muitos abrigos, onde diferentes populações fizeram pinturas rupestres. Os registros das pinturas são fontes inesgotáveis de informações arqueológicas que podem e devem ser estudados sob diversos aspectos (antropológico, cronológico, de comunicação, como processos artísticos e estéticos e do imaginário humano; além de estudos paleoclimáticos e paleoambientais). As tradições rupestres constatadas são a Planalto, com predominância de representações de cervídeos e figuras humanas em movimento, figuras de prováveis pés de milho, e representações relacionadas à Tradição Geométrica. É extremamente necessário pesquisar o contexto histórico-geográfico dos abrigos com pinturas rupestres para que se possam identificar os diversos grupos culturais que habitaram a região de Piraí da Serra ao longo do tempo e em determinadas condições ambientais. Devido à sua abundancia são necessários maiores estudos e uma adequada gestão desse patrimônio arqueológico, pois parte se encontra degradado por ação natural e depredado por ações humanas. O estudo buscou aprofundar os conhecimentos ambientais e históricos para adequada gestão do patrimônio arqueológico, caracterizando e espacializando os abrigos com pinturas rupestres por meio de um SIG (Sistemas de Informação Geográfica). O tratamento dos dados levantados possibilitou a organização de um banco de dados que dinamizará a conservação da área.
Some Remarks on Gombrowicz’s Kronos
Authors: Fiut Aleksander
Published: June 2015

Is it a rough draft or a finished text? Are these private notes that should never have been published or an important work by Witold Gombrowicz? Do we now have—at long last—a portrait of the real Gombrowicz, without masks or mystifications? The discussion that has raged in various journals since the publication of Kronos has continually returned to these questions
Razonamientos basados en el concepto de límite finito de una función en un punto
Authors: Fernández Plaza José Antonio , Ruiz-Hidalgo Juan Francisco , Rico Luis
Published: June 2015

Este artículo analiza las concepciones de los estudiantes de bachillerato acerca del concepto de límite finito de una función en un punto a partir de su representación gráfica. Las concepciones emergen de los argumentos que los estudiantes expresan cuando aplican sus definiciones individuales a una selección de modelos gráficos del concepto. La bondad de los razonamientos observados se caracteriza en términos de tres niveles de coherencia entre los argumentos de cada estudiante y una definición individual elaborada previamente. Los resultados muestran concepciones reconocidas en estudios previos. También este estudio detecta concepciones particulares, tales como la necesidad de que exista la imagen de una función en un punto para discutir acerca de su límite en dicho punto. Asimismo, detectamos un equilibrio entre argumentos plenamente coherentes y los incoherentes con la definición personal.
Aprendizaje de competencias científicas versus aprendizaje de contenidos específicos. Una propuesta de evaluación
Authors: Benarroch Benarroch Alicia , Núñez Graciela Inés
Published: June 2015

En este trabajo se realiza una propuesta para el estudio del aprendizaje experimentado por estudiantes de 12-13 años tras la aplicación de una propuesta de enseñanza sobre el Modelo Corpuscular de la Materia (MCM). En el marco teórico se plantea la distinción entre aprendizaje de competencias y de contenidos específicos, y se asocia el primero al cambio de nivel de esquemas explicativos puestos en juego por el estudiante, mientras que el segundo se asocia al cambio de los rendimientos totales. El tratamiento estadístico de los datos se realizó con un método multivariable usando el paquete SPSS 20.0. Los resultados muestran que el aprendizaje de competencias científicas conlleva una dificultad bastante mayor que el de contenidos específicos.
Les flashmobs et le rôle des réseaux sociaux numériques : une étude exploratoire d’un flashmob écologique
Authors: Cissé-Depardon Karine , Papetti Catherine
Published: June 2015

Cet article étudie l’influence des réseaux sociaux numériques (RSN) sur l’organisation et la participation à une forme de buycott appelée carrotmob qui peut être défini comme un flashmob écologique. A l’issue d’une étude qualitative exploratoire réalisée auprès de 26 participants à des carrotmobs , il semblerait que les RSN n’ont pas l’influence espérée et attendue. Notre recherche met alors en évidence les caractéristiques et spécificités de l’action et du participant qui pourraient expliquer l’impact limité et l’inefficacité partielle des RSN. Nous proposons un certain nombre d’implications managériales visant à renforcer l’efficacité des RSN dans le cadre d’actions collectives.
Légitimité et stratégies de légitimation des associations de consommateurs dans le paysage consumériste actuel
Authors: Nabec Lydiane , Chevalier Corinne , Briat Eric , Roux Dominique
Published: June 2015

Depuis plusieurs années, la position des associations de consommateurs, acteurs historiques du mouvement consumériste, s’est fragilisée. Légitimer leur rôle auprès de leurs publics est pourtant un enjeu majeur de la protection des intérêts des consommateurs. L’objectif de cet article est d’identifier les stratégies de légitimation qui peuvent les y aider. Une étude qualitative permet de dresser un diagnostic sur leur légitimité au travers des représentations et des pratiques de cinquante et un répondants pour s’informer sur les caractéristiques de l’offre et se défendre en cas de litige. Quatre stratégies de légitimation sont présentées, avec les risques inhérents à leur mise en œuvre : accroitre la visibilité des associations de consommateurs, sélectionner des cibles prioritaires, se spécialiser pour gagner en expertise et soutenir les actions collectives.
Cycle de vie d’un contexte expérientiel : une approche exploratoire du parcours artistique du tramway de Strasbourg
Authors: Roederer Claire , Schwarzberg Mickaelle
Published: June 2015

A partir d’un protocole ethnomarketing, cette recherche explore la contribution du parcours jalonné d’œuvres d’art le long des lignes du tramway de Strasbourg, à l’expérience de consommation des usagers/voyageurs. Les résultats indiquent une forte rupture dans les perceptions des usagers entre la mise en place du contexte et la perception actuelle, et permettent d’identifier un cycle de vie du contexte formé de trois phases (mise en œuvre, réaction, dilution). Ces phases suggèrent des stratégies de pilotage, pour réamorcer la capacité du contexte à surprendre et intéresser les usagers/voyageurs ce contexte.
Gamme de produits et fidélisation des consommateurs dans les catégories d’achat fréquent : proposition d’un cadre conceptuel et d’un modèle diagnostic
Authors: Aurier Philippe , Mejía Victor
Published: June 2015

Dans une catégorie, les marques proposent souvent des gammes composées de nombreux produits. Or, la plupart des recherches considèrent la fidélité comportementale au niveau « marque », sans considérer les produits de sa gamme. De plus, seule la fidélité longitudinale est considérée, négligeant ainsi la fidélité instantanée. Nous proposons ici une décomposition de la fidélité comportementale en fonction de l’unité de choix achetée (un produit spécifique / différents produits de la gamme) et de la perspective temporelle (instantanée / longitudinale). Le modèle Logit proposé permet de diagnostiquer la performance des gammes des marques de la catégorie et d’émettre des préconisations managériales.
Des voix du silence. Variations de la narration indécidable dans le roman de mémoire contemporain1
Authors: Kühn Marion
Published: June 2015

Par la mise en scène de la fiabilité problématique de tentatives d’appropriation du passé, le roman de mémoire interroge souvent la subjectivité et la sélectivité de la mémoire. Présentant trois variations de la narration indécidable, l’article vise à démontrer l’apport supplémentaire de cette forme de narration problématique à la réflexion sur la mémoire par la fiction, notamment sur la formation collective de la mémoire individuelle. Pour ce faire, l’article analyse trois romans de mémoire québécois, allemand et français publiés après 2000, et qui exploitent de différentes manières le contraste entre voix narratives individualisées et voix narratives dont l’attribution pose problème. Ce faisant, Hunter s’est laissé couler de Judy Quinn, Spione de Marcel Beyer et Des hommes de Laurent Mauvignier suscitent des questions sur la mise en récit d’une mémoire passée sous silence. Si Hunter s’est laissé couler interroge surtout les enjeux de la mise en fiction d’une vie quasi inconnue, Spione se penche sur le vide mémoriel et identitaire que provoque un passé tu chez ceux qui viennent après. Quant au roman Des hommes, il repose sur la mise en récit paradoxale d’un passé indicible qui occasionne le silence auquel se heurtent les personnages des romans de Quinn et de Beyer.
Hétérogénéisation de l’énonciation dans l’oeuvre de Tanguy Viel
Authors: Richir Alice
Published: June 2015

La question « qui parle ? » dans les romans de Tanguy Viel a tendance à être éludée par l’identification d’un narrateur homodiégétique qui est, de surcroît, le personnage principal de l’histoire. Cette réponse spontanée ne résiste toutefois pas à une lecture plus attentive de l’oeuvre de cet auteur. Chez Viel, l’énonciation n’est jamais transparente, l’identification jamais unilatérale. Toute tentative pour déterminer l’identité de l’instance en charge de la narration met bien vite au jour les traces linguistiques d’une présence subjective autre que celle du narrateur identifié. En effet, l’univocité de la voix narrative est rapidement mise en doute par le caractère indéterminé du narrateur qui l’assume, ainsi que par le fait que la parole de celui-ci est constamment hantée par d’autres voix dont l’origine demeure incertaine. Il s’agira dans cet article de déplier progressivement cette question de l’attribution de la narration, en commençant par interroger la nature de la figure en charge de celle-ci pour, ensuite, identifier les procédés déployés au service d’une telle entreprise de subversion de la mise en récit.
The secret lives of Drosophila flies
Authors: Markow Therese Ann
Published: June 2015

Flies of the genus Drosophila, and particularly those of the species Drosophila melanogaster, are best known as laboratory organisms. As with all model organisms, they were domesticated for empirical studies, but they also continue to exist as wild populations.

Decades of research on these flies in the laboratory have produced astounding and important insights into basic biological processes, but we have only scratched the surface of what they have to offer as research organisms. An outstanding challenge now is to build on this knowledge and explore how natural history has shaped D. melanogaster in order to advance our understanding of biology more generally.
'Ser' focalizador como mezcolanza sintactica
Authors: Vázquez-Larruscaín Miguel
Published: June 2015

ABSTRACT. This paper recovers the point of view that ser focalizador constructions C-SF are syntactic blends, in opposition to two other contending views, according to which ser focalizador is either a focal proyection within a monoclausal structure or a reduced pseudo-cleft. It is also claimed that a merely constructionist analysis of C-SF is insufficient to account for the distributional properties of these hybrid constructions. Among the syntactic options, the monoclausal claim is chosen. Finally, it is shown that there are better alternatives, with a simpler syntax, than focal syntactic projections. Thus, complications are sent back to the study of rules projecting focus upwards in the syntactic tree, as a fundamental aspect of the interface between grammar, interpretation, and sound.
Negation of resultative and progressive periphrases
Authors: González Rodríguez Raquel
Published: June 2015

This paper focuses on resultative and progressive periphrases in Spanish: <estar ‘to be’ + participle> and <estar ‘to be’ + gerund>, respectively. These periphrases have been associated with several negated constructions. On the one hand, the negative particle no ‘not’ can precede the auxiliary verb (<no estar ‘not to be’ + participle> and <no estar ‘not to be’ + gerund>); on the other hand, we have the structure <estar sin ‘to be without’ + infinitive>. Contrary to what has been suggested in the literature, I will show that these negative constructions have a different interpretation and develop a semantic analysis of them. Furthermore, I will offer new evidence in favor of the existence of negative events.
Disproportionality Analysis From World Health Organization Data on Semaglutide, Liraglutide, and Suicidality
Authors: Schoretsanitis Georgios , Weiler Stefan , Barbui Corrado , Raschi Emanuel , Gastaldon Chiara
Published: August 2024

Importance

Glucagon-like peptide-1 receptor agonists (GLP-1 RAs) have gained use primarily due to their weight-reduction effects, although a regulatory review was undertaken for potential suicidality concern.

Objectives

To evaluate potential signals for suicidal and self-injurious adverse drug reactions (ADRs) associated with the GLP-1 RAs semaglutide and liraglutide.

Design, Setting, and Participants

Disproportionality analysis through the case-control design using the World Health Organization (WHO) global database of suspected ADRs. Participants were clinical patients worldwide experiencing an ADR suspectedly attributable to semaglutide or liraglutide in the database from inception to August 30, 2023. Data were analyzed from September to December 2023.

Exposure

Treatment with semaglutide or liraglutide regardless of indication or treatment duration.

Main Outcomes and Measures

Reporting odds ratio (ROR) and the bayesian information component (IC) with 95% CIs were calculated as measures of disproportionate reporting of suicidal and self-injurious ADRs associated with semaglutide and liraglutide compared with all other medications. Sensitivity analyses were conducted including patients with coreported use of antidepressants and benzodiazepines and using dapagliflozin, metformin, and orlistat as comparators. A disproportionality signal was considered when the lower limits of the ROR and IC were above 1 and 0, respectively.

Results

A total of 107 (median [IQR] age 48 [40-56] years; 59 female patients [55%]) and 162 (median [IQR] age 47 [38-60] years; 100 female patients [61%]) cases of suicidal and/or self-injurious ADRs were reported between November 2000 and August 2023 with semaglutide and liraglutide, respectively. Significant disproportionality was detected only for semaglutide-associated suicidal ideation (ROR, 1.45; 95% CI, 1.18-1.77; IC, 0.53; 95% CI, 0.19-0.78), which remained significant in patients with coreported use of antidepressants (ROR, 4.45; 95% CI, 2.52-7.86; IC, 1.96; 95% CI, 0.98-2.63) and benzodiazepines (ROR, 4.07; 95% CI, 1.69-9.82; IC, 1.67; 95% CI, 0.11-2.65), when compared with dapagliflozin (ROR, 5.56; 95% CI, 3.23-9.60; IC, 0.70; 95% CI, 0.36-0.95), metformin (ROR, 3.86; 95% CI, 2.91-5.12; IC, 1.20; 95% CI, 0.94-1.53) and orlistat (ROR, 4.24; 95% CI, 2.69-6.69; IC, 0.70; 95% CI, 0.36-0.95).

Conclusions and Relevance

This study using the WHO database found a signal of semaglutide-associated suicidal ideation, which warrants urgent clarification.
New Nitrate Additive Enabling Highly Stable and Conductive SEI for Fast‐Charging Lithium Metal Batteries
Authors: Su Kexin , Luo Piao , Wu Yuanlong , Song Xin , Huang Lianzhan , Zhang Shaocong , Song Huiyu , Du Li , Cui Zhiming
Published: August 2024

Polyester‐based electrolytes formed via in situ polymerization, have been regarded as one of the most promising solid electrolyte systems. Nevertheless, it is still a great challenge to address the issue of their high reactivity with metallic lithium anode by optimizing the components and properties of solid electrolyte interphase (SEI). Herein, a new class of N‐containing additive, isopropyl nitrate (ISPN) that can be miscible with ester solvents is demonstrated, and a chemically stable and ion‐conductive LiF‐Li3N composite SEI is constructed. In addition, ISPN can induce the formation of anion‐enriched solvation structures and reduces the desolvation barrier of Li+, resulting in fast transport of Li+. With the addition of ISPN, ionic conductivity of the electrolyte has nearly doubled, reaching as high as 5.3 × 10−4 S cm−1. What's more, the LiFePO4 (LFP)|ISPN‐PTA|Li cell exhibits exceptional cycle stability and fast charging capabilities, maintaining stable cycling for 850 cycles at 10 C rate. Even when paired with the high‐voltage cathode, the LiNi0.6Co0.2Mn0.2O2 (NCM622)|ISPN‐PTA|Li cell achieves an impressive capacity retention of 97.59% after 165 cycles at 5 C. This study offers a novel approach for ester‐based polymer electrolytes, paving the way toward the development of stable and high‐energy Li metal battery technologies.
Carbon Dots for Anti‐Corrosion
Authors: Xiang Tengfei , Wang Jiaqi , Liang Yanli , Daoudi Walid , Dong Wei , Li Ruiqian , Chen Xuxin , Liu Shengjun , Zheng Shunli , Zhang Kui
Published: August 2024

Carbon dots (CDs) have garnered extensive attention owing to their excellent biocompatibility, elevated specific surface area, and facile functionalization, as well as their diverse methods of preparation. In recent times, CDs have been applied for anti‐corrosion and obtained some significant results. In this work, the preparation methods of CDs are first briefly introduced, and the relative merits of different approaches are highlighted. Subsequently, the application of CDs in the realm of corrosion inhibitors is discussed, and the corrosion inhibition effects and mechanism of nitrogen‐doped CDs, nitrogen and sulfur‐co‐doped CDs, as well as CDs functionalized with other elements and nitrogen‐co‐doped are summarized. Finally, the application of CDs and functionalized CD‐modified coatings for anti‐corrosion and their protective mechanism is analyzed in detail. This review summarizes recent progress in research related to CDs and heteroatom‐doped CDs in anti‐corrosion applications and anticipates the prospects and applications of CDs in corrosion protection. With their unique properties and versatile applications, CDs are expected to assume a progressively pivotal role in the advancement of cutting‐edge corrosion protection technologies.