Technological approach to ceramic manufacture in the Pre-Halaf in Tell Halula (Syria)

El objetivo principal de este artículo es el de realizar una primera aproximación a las soluciones tecnológicas asociadas a las primeras producciones cerámicas del período Pre-Halaf (VII milenio cal BC) en el yacimiento de Tell Halula (Siria). Se analiza el conjunto desde una nueva perspectiva metodológica, priorizando los aspectos vinculados al proceso de modelaje de los recipientes cerámicos.The main objective of this paper is to approach for the first time the technological solutions associated with the first ceramic production from the Pre-Halaf culture (VII millennium cal BC) in the Tell Halula settlement (Syria). The set is analysed from a new methodological perspective, prioritizing the aspects related with the manufacturing processes of the pottery vessels

Journal of Physics: Conference Series

Lightweight designs and demanding safety requirements in automotive industry are increasingly promoting the use of Advanced High Strength Steel (AHSS) sheets. Such steels present higher strength (above 800 MPa) but lower ductility than conventional steels. Their great properties allow the reduction of the thickness of automobile structural components without compromising the safety, but also introduce new challenges to parts manufacturers. The fabrication of most cold formed components starts from shear cut blanks and, due to the lower ductility of AHSS, edge cracking problems can appear during forming operations, forcing the stop of the production and slowing down the industrial process. Forming Limit Diagrams (FLD) and FEM simulations are very useful tools to predict fracture problems in zones with high localized strain, but they are not able to predict edge cracking. It has been observed that the fracture toughness, measured through the Essential Work of Fracture (EWF) methodology, is a good indicator of the stretch flangeability in AHSS and can help to foresee this type of fractures. In this work, a serial production automotive component has been studied. The component showed cracks in some flanged edges when using a dual phase steel. It is shown that the conventional approach to explain formability, based on tensile tests and FLD, fails in the prediction of edge cracking. A new approach, based on fracture mechanics, help to solve the problem by selecting steel grades with higher fracture toughness, measured by means of EWF. Results confirmed that fracture toughness, in terms of EWF, can be readily used as a material parameter to rationalize cracking related problems and select AHSS with improved edge cracking resistance.Peer ReviewedPostprint (published version

A biografia linguística visual como instrumento de pesquisa multimodal sobre o desenvolvimento da competência plurilingue

Respondendo ao atual “visual turn” nos estudos em Linguística Aplicada, em geral, e no estudo da relação dos sujeitos com as línguas, mais especificamente, o presente artigo reflete acerca do uso de biografias linguísticas visuais como recurso de investigação na Didática do Plurilinguismo. Os autores partem de um estudo de caso na Universidade Federal do Paraná (Brasil) em que 30 estudantes do Programa de Pós-graduação em Letras foram convidados a desenhar suas biografias linguísticas. Os investigadores analisam que atores sociais, espaços, tempos e eventos são representados pelos estudantes como chave no processo de ser e de se tornar plurilingue, assim como que representações sociais acerca desse processo emergem da combinação dos elementos visuais desenhados. Finalmente, são discutidas algumas vantagens do recurso ao desenho como método de investigação em Didática de Línguas

Identification of fracture toughness parameters to understand the fracture resistance of advanced high strength sheet steels

The fracture toughness of four advanced high strength steel (AHSS) thin sheets is evaluated through different characterization methodologies, with the aim of identifying the most relevant toughness parameters to describe their fracture resistance. The investigated steels are: a Complex Phase steel, a Dual Phase steel, a Trip-Aided Bainitic Ferritic steel and a Quenching and Partitioning steel. Their crack initiation and propagation resistance is assessed by means of J-integral measurements, essential work of fracture tests and Kahn-type tear tests. The results obtained from the different methodologies are compared and discussed, and the influence of different parameters such as specimen geometry or notch radius is investigated. Crack initiation resistance parameters are shown to be independent of the specimen geometry and the testing method. However, significant differences are found in the crack propagation resistance values. The results show that, when there is a significant energetic contribution from necking during crack propagation, the specific essential work of fracture (we) better describes the overall fracture resistance of thin AHSS sheets than JC. In contrast, energy values obtained from tear tests overestimate the crack propagation resistance and provide a poor estimation of AHSS fracture performance. we is concluded to be the most suitable parameter to describe the global fracture behaviour of AHSS sheets and it is presented as a key property for new material design and optimization.Peer ReviewedPostprint (author's final draft

Apresentação: Métodos visuais na investigação com públicos plurilíngues - Visões multidisciplinares

Apresentação do dossiê especial "Métodos visuais na investigação com públicos plurilíngues"

Differences in Drug Use among Persons Experiencing Homelessness According to Gender and Nationality

The main aims of this article are to update the data related to drug and alcohol use in persons experiencing homelessness (PEH) who use shelters, and to see if there are significant differences in their drug use depending on their gender and nationality. The article presents an analysis of the interconnections between the results of drug dependence detection tools (Alcohol Use Disorders Identification Test (AUDIT), Drug Abuse Screening Test (DAST-10), Severity of Dependence Scale (SDS)) according to gender and nationality with the intention of identifying specific needs that lead to new lines of research into better approaches to homelessness. A cross-sectional, observational and analytical method was used to analyse the experiences of persons experiencing homelessness who use various shelters in the cities of Madrid, Girona, and Guadalajara (Spain). The results show that there are no gender differences in the risks of using drugs and drug addiction, but there are differences in terms of nationality for drug addiction, with Spanish nationals showing a greater tendency to develop drug addiction. These findings have significant implications, as they highlight socio-cultural and socio-educational influence as risk factors in drug addiction behaviours

Implementing Pedagogical Approaches for ESD in Initial Teacher Training at Spanish Universities

Within the framework of the United Nations 2030 Agenda for Sustainable Development, four case studies of the degree in Primary Education at three Spanish universities are analyzed. The aim is to study the suitability of three di erent active teaching-learning strategies: problem-based learning (PBL), project-oriented learning (POL), and a cross-disciplinary workshop. Another goal is to promote the integration of education for sustainable development (ESD) and measure the level of acquisition of several competencies of sustainability and the change in consumption habits of future teachers after implementing those pedagogical approaches. Initial and final ecological footprint (EF) as well as a rubric to measure the level of acquisition of competencies of sustainability were used as data collection instruments. The conclusions related to the research objectives show that when sustainability is implemented in the curriculum through active teaching-learning strategies, future teachers acquire competencies of sustainability. They also reveal that said strategies contribute to a change in consumption habits as a reduction in the EF is observed. There exists a relation between EF reduction and high levels of acquisition of competency in sustainability

Morfologia do intestino delgado de capivara - Hydrochoerus hydrochaeris (Linnaeus, 1766)

O alto potencial zootécnico para a exploração da capivara implica no aporte de informações sobre a morfofisiologia do trato digestório para adequada implementação do manejo nutricional. O intestino delgado foi investigado em seus aspectos macro e microscópico e as correlações entre os comprimentos dele e do corpo foram averiguados. Os valores absolutos, mínimo e máximo foram, respectivamente, para fêmeas e machos de 441 cm e 1734 cm e de 355 cm e 1123 cm, dimensões intestinais que alocaram a espécie entre as do canino e do suíno. A correlação entre comprimento corpóreo e intestinal revelou que o comprimento do intestino delgado corresponde a aproximadamente 12 vezes o comprimento corpóreo do animal, não havendo diferenças significativas quanto ao sexo. Cada segmento do intestino não mostrou diferenças estatisticamente significativa entre os sexos. A correlação entre o comprimento desses segmentos e o comprimento corpóreo foi positiva e estatisticamente significativa somente para o duodeno. O intestino delgado era formado pela mucosa, submucosa, muscular e serosa. A mucosa possuía glândulas intestinais e duodenais, respectivamente, do tipo serosa e mucosa. A lâmina muscular da mucosa era composta por duas camadas bastante evidentes no jejuno e no íleo, e delgada e única, no duodeno. A submucosa de tecido conjuntivo moderadamente denso não apresentava glândulas. Os feixes de fibras da camada interna da túnica muscular estavam dispostos de forma helicoidal. Macroscopicamente, o intestino delgado na capivara assemelhou-se ao dos caninos e suínos, embora microscopicamente sutis diferenças puderam ser identificadas na tela submucosa e muscular interna.The high potential for the exploitation of capybara requires information about its digestory morphophysiology, to improve nutritional handling. In the present study, gross anatomy, light microscopy and body and intestine lengths of 25 capybaras were evaluated. The minimum and maximum small intestine lengths for females and males were, respectively, 441 cm and 1734 cm, and 355 cm and 1123 cm. These values position the capybara between canine and swine intestinal lengths. The ratio between small intestine and body length was 12:1, without differences between sexes. There were no statistically significant differences between sexes for each part of small intestine. Correlation between length of each small intestine segment and body length was positive, and statistically significant only for the duodenum. The small intestine wall was formed by mucosa, submucosa, muscular and serosa. The mucosa presented intestinal and duodenal glands, of mucosal and serosal types, respectively. The mucosa muscular layer consisted of two distinct layers in the jejunum and ileum, and a thin and single layer in the duodenum. The submucosa, formed by moderate dense connective tissue, didn't show glands. The fiber bundles of the internal layer of muscular tunic were helicoidally arranged. The gross anatomy of the capybara small intestine was similar to canine and swine intestines. Microscopically, however, subtle differences can be identified in the submucosa and internal muscular tunics