Artigos em revistas internacionais
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- O projecto Interfruta II e os problemas fitossanitários que afectam as fruteiras na ilha Terceira, AçoresPublication . Lopes , D. J. H.; Cabrera, R.; Aguin-Pombo, D.; Aguin-Pombo, Dora; Borges, P.; Pimentel, R.; Zorman, M.; Macedo, N.; Carvalho., M. C. F.; Ornelas, L.; Martins, J. T.; Mumford, J. D.; Mexia, A. M. M.O Projecto Interfruta II é um projecto apoiado pelo programa Interreg III-B, desenvolvido nas Ilhas da Madeira, Tenerife (Canárias) e Terceira (Açores) destinado a contribuir para a promoção da fruticultura e viticultura nestas três regiões insulares, aplicando técnicas que contribuam decisivamente para o conhecimento e procura de soluções, numa vertente de prospecção das pragas-chave, fauna auxiliar, doenças e vírus que afectam essas culturas. Dentro dos problemas fitossanitários que afectam as culturas estudadas, através da identificação das pragas-chave de cada cultura foi utilizada a observação visual e a monitorização através de armadilhas com feromona sexual e placas cromotrópicas. Na prospecção da fauna auxiliar foi utilizada a técnica das pancadas e a armadilha Malaise. Após a identificação das pragas-chave, centrou-se a investigação sobre as mais importantes. Na mosca-do-Mediterrâneo (C. capitata Wied.), usando os SIG, foi montada uma rede de armadilhas em toda a ilha. Na bananeira, centrou-se a investigação no gorgulho-da-bananeira (Cosmopolitus sordidus Germar) e nas tripes. No castanheiro, o bichado-da-castanha (Cydia splendana Hubner) procedeu-se à sua monitorização utilizando armadilhas com feromona sexual e a quantificação dos prejuízos que causa nos frutos. Nas macieiras, os principais problemas decorrem da presença de aranhiço vermelho (Panonychus ulmi Koch), traça-oriental (Cydia molesta Busck), bichado (Cydia pomonella L.), afídeos e tripes. Os resultados obtidos permitiram construir uma base de dados fitossanitários de diagnóstico da Macaronésia (PROFITOMAC) que se encontra disponível on-line em www.interfruta.net Neste trabalho apenas se apresentam os resultados obtidos nos estudos realizados sobre as pragas e fauna auxiliar.
- O desenho da figura humana na Ilha da Madeira: evidências de validadePublication . Pocinho, Margarida; Wechsler, Solange Muglia; Neves, GeorginaResumo O desenho da figura humana (DFH) é uma das formas mais utilizadas para avaliar o desenvolvimento intelectual infantil. Este estudo investigou as evidências da validade e precisão do sistema Wechsler de correção do DFH para as crianças da Madeira. A amostra incluiu 489 crianças (49% meninas), com entre 5 e 13 anos de idade, de escolas do 1º e 2º ciclos do sistema educativo. Os instrumentos foram: DFH, teste de Matrizes Progressivas Coloridas de Raven (MPCR) e notas escolares (Português e Matemática). Existem diferenças por idade, sexo e da figura desenhada. As correlações entre DFH, MPCR e notas escolares foram significativas. A precisão foi satisfatória (>0,80). Concluindo, este teste DFH possui evidências de validade e precisão, indicando a possibilidade de utilização após obtenção de normas portuguesas.
- The drawing of the human figure in Madeira Island: evidence of validityPublication . Pocinho, Margarida; Solange Muglia Wechsler; Neves, Georgina; Pocinho, MargaridaAbstract Human figure drawing (HFD) is one of the most widely tests used to assess children's intellectual development. This study investigated the evidence of the validity and reliability of HFD for children in Madeira using Wechsler`s scoring system. The sample included 489 children (49% girls), 5-13 years old, from schools in the 1st and 2nd cycles of the education system. The instruments were: HFD, Raven's Colored Progressive Matrices (CPM) test, and school grades (Portuguese and Mathematics). There were differences by age, gender, and the figure drawn. The correlations between HFD, CPM, and school grades were significant. Reliability was satisfactory (>0.80). In conclusion, the Wechsler’s scoring system for HFD has evidence of validity and reliability for children in Madeira indicating the possibility of its use after obtaining Portuguese norms.
- Validação da escala de Mobbing docente: análise fatorial exploratória e confirmatóriaPublication . Agrela, Sara; Pocinho, Margarida; Sales, Sofia; Garcês, Soraia; Agrela, Sara; Pocinho, Margarida; Garcês, SoraiaO mobbing é um fator de risco para a saúde mental dos docentes. Entidades internacionais têm realizado recomendações com vista à adoção de estratégias de prevenção e promoção da saúde mental nos contextos profissionais. Esta investigação objetivou validar a Escala de Mobbing Docente (EMB), através da análise fatorial exploratória (AFE) e da fatorial confirmatória (AFC). A amostra foi de 196 docentes, com idades entre os 21 e os 66 anos, sendo 79% do género feminino. A AFE revelou três fatores que explicam 65% da variância do construto. A consistência interna obteve valores muito bons (α >.80). A análise fatorial confirmatória (AFC) apresentou uma qualidade de ajuste adequada e confirmou a estrutura fatorial da AFE de três fatores: F 1=“desvalorização social”; F2=“manipulação perversa das tarefas e funções” e F3=“humilhação pessoal e familiar”). Conclui-se que a Escala de Mobbing Docente é adequada para avaliação do mobbing em professores portugueses.
- The experiences of intimacy, commitment and passion throughout life: a qualitative study of older gay and bisexual menPublication . Gonçalves, José Alberto Ribeiro; Pocinho, Margarida; Costa, Pedro Alexandre; Leal, Isabel; Pocinho, MargaridaAbstract Romantic relationships during aging can have diverse implications for reducing mental health problems, mortality rates, and the prevention and management of chronic diseases in older adults. However, little is known about the relational dynamics of gay and bisexual (GB) older men. The experiences of romantic relationships throughout the life cycle of Portuguese GB older people and their relationship with identity development were evaluated using Sternberg’s triangular theory of love. A total of 23 semi-structured interviews were carried out with older community-dwelling Portuguese GB (60 + years old) using the lifeline, which were later analyzed using thematic analysis. The results suggested that experiences of greater relational maturity in older GB people corresponded to phases of greater identity integrity. These older adults gradually experienced more complex levels of love, starting from more passionate love relationships (confusion/comparison phase) to romantic love relationships (tolerance/acceptance phase) and later companionate love relationships (synthesis phase). These relational changes accompanied broader psychosocial changes in gaining rights and freedoms in Portugal. Older gay and bisexual men are capable of experiencing complex forms of love, just like their heterosexual counterparts. However, they tend to reach these stages later in life due to the significant obstacles imposed by the psychosocial context on the development of their identities.
- Creativity and resilience in higher education: a study in the Autonomous Region of MadeiraPublication . Agrela, Sara; Garcês, Soraia Fernandes; Pocinho, Margarida; Agrela, Sara; Garcês, Soraia; Pocinho, MargaridaNa Psicologia Positiva, tanto a criatividade como a resiliência são consideradas utensílios cruciais para o desenvolvimento saudável dos indivíduos (Seligman & Csikszentmihalyi, 2000; Yunes, 2003). Neste estudo, pretende-se explorar as variáveis criatividade e resiliência na comunidade do ensino superior. A amostra é constituída por 326 participantes com 17 anos ou mais. No que respeita aos instrumentos utilizados, foi aplicada a Escala de Personalidade Criativa – Forma Reduzida, de Pocinho et al. (2020) e a Measuring State Resilience, adaptada para a população portuguesa por Martins, em 2005 (Teixeira, 2014). Os resultados indicam que existe uma associação/correlação positiva entre a criatividade e a resiliência; os indivíduos do género feminino são mais resilientes; os indivíduos mais velhos são mais resilientes e tendencialmente mais criativos; os indivíduos que possuem o ensino superior são mais criativos; os docentes são mais resilientes do que os estudantes e do que os investigadores; os docentes são mais criativos do que os estudantes. Implicações práticas são também apresentadas e discutidas.
- Effect of nickel on the mechanical properties of spray-formed Al-15Si-2Cu alloy at elevated temperaturesPublication . Goudar, Dayanand M.; Alavandi, Mehabubsubahani R.; Bhat, Subraya Krishna; Bommenahalli, Raghukumar; Kurahatti, Rajashekar V.; Pinto, Deesy G.; Raju, K.; Pinto, Deesyat different temperatures was examined and evaluated with that of the as-cast (AC) alloy. The microstructure of SF alloys revealed uniformly distributed spherical shaped primary silicon and eutectic silicon phases along with fine Ni and Cu intermetallic particles dispersed throughout the equiaxed Al matrix. The microstructure of AC alloys consisted of coarse primary Si, flake-type eutectic phase, Cu-rich intermetallics with a complex branched morphology and a network of short strips. The mechanical properties of the alloys were assessed at temperatures of 30◦C, 100◦C, 200◦C and 300◦C. The SF alloys exhibited higher hardness than AC alloys at all temperatures with a maximum increase of 74 % at 30◦C. The hardness of alloys showed a decreasing trend with increasing temperature. The mechanical strength of SF alloys was higher than that of the AC alloys across the entire temperature range from 30◦C to 300◦C with a decrease in ultimate tensile strength (UTS) by 4–6 % at 250◦C. The SF alloys demonstrated a significant increase in UTS (25 % at 30◦C and 40 % at 300◦C) compared to the AC alloys. The Al-15Si-2Cu-2Ni alloy showed highest increase (14.3–18.6 %) and Al-15Si-2Cu-6Ni alloy showed the lowest increase (10.5 % to 14 %) in percent elongation between 30◦C and 300◦C.
- Enhancing the interfacial adhesion and mechanical strength of pultruded ECR–glass fiber composites with nanofiller-infused epoxy resinPublication . Chandra, Poorna; Venkatarayappa, Ravikumar; Chandrashekar, Savitha D.; Raveendra, Kiran; Bhaskararao, Asha P.; Bheemappa, Suresha; Goudar, Dayanand M.; Kurhatti, Rajashekhar V.; Raju, K.; Pinto, Deesy G.; Pinto, DeesyThe effect of the interaction between silica (nS) and hydroxyapatite (nHap) nanomaterials on the characteristics of unidirectional glass-fiber-reinforced epoxy (GF/Ep) composite systems is investigated in this work. The goal of the study is to use these nanofillers to improve the microstructure and mechanical characteristics. Pultrusion was used to produce hybrid nanocomposites while keeping the GF loading at a consistent 75% by weight. The hybrid nanocomposites were made with a total filler loading of 6 wt.%, including nHap, and a nS loading ranging from 2 to 4 wt.%. The mechanical performance of the composite was greatly improved by the use of these nanofillers. Compared to neat GF/Ep, hybrid nanocomposites with 6 wt.% combined fillers exhibited increased hardness (14%), tensile strength (25%), interlaminar shear strength (21.3%), and flexural strength (33%). These improvements are attributed to efficient filler dispersion, enhanced fiber-matrix adhesion, and crack propagation resistance. Incorporating 4 wt.% nS alone improved hardness (6%), tensile strength (9%), tensile modulus (21%), interlaminar shear strength (11.4%), flexural strength (12%), and flexural modulus (14%). FTIR analysis indicated Si-O-Si network formation and increased hydrogen bonding, supporting enhanced interfacial interactions. Ultraviolet reflectance measurements showed increased UV reflectivity with nS, especially in hybrid systems, due to synergistic effects. Impact strength also improved, with a notable 11.6% increase observed in the hybrid nanocomposite. Scanning and transmission electron microscopy confirmed that the nanofillers act as secondary reinforcements within the matrix. These hybrid nanocomposites present a promising material choice for various industries, including marine structural applications and automotive components.
- Effect of cenosphere fillers on mechanical strength and abrasive wear resistance of carbon–glass polyester compositesPublication . Pulikeshi, K. H.; Goudar, Dayanand M.; Kurahatti, R. V.; Pinto, Deesy G.; Pinto, DeesyFabric-reinforced hybrid polymer composites are present in almost every sector of modern life, and most essential areas of research in recent years have focused on glass–carbon fabric with filler material composites. Fabric and fillers are employed in strengthening polymer composites with the aim of improving their mechanical and tribological properties. The primary objective of this investigation was to investigate thetribological and mechanical properties of unfilled and cenosphere-filled carbon–glass-reinforced polyester composite systems, utilizing two types of fabric (glass and carbon) with cenosphere filler in varying weight fractions (0, 2.5, 5, 7.5, 10, and 12.5 wt.%) for both carbon fabric and the cenosphere. The abrasive wear characteristics were evaluated using a stainlesssteel wheel abrasion tester, utilizing silica sand as the abrasive material. Tests were performed at various distances (360–1800 m) and loads (12 N and 24 N). The results show that the wear rate of carbon–glass fabric-reinforced polyester composites differs significantly, with and without cenosphere fillers. Notably, the unfilled composites exhibit the highest wear volume loss, indicating a substantial improvement in wear resistance with the addition of cenospheres. The results reveal that in carbon–glass fabric-reinforced polyester composites, specific wear rate decreases when more cenospheres are loaded. The wear rate was successfully reduced by cenospheresunder silica sand as an abrasive. Compared to unfilled composites, the mechanical properties of filled composites exhibit superior performance. These variations were explained by examining the worn-out surfaces under an SEM and correlating the features observed with the mechanical properties.
- Effect of sintering temperature on the physical and mechanical characteristics of fabricated ZrO2–Cr–Ni–Ce–Y compositePublication . Saini, Brajesh Chandra; Jain, Naman; Rao, Dinesh Kumar; Singhal, Varun; Verma, Akarsh; Goudar, Dayanand M.; Raju, Kandavalli; Pinto, Deesy G.; Pinto, DeesyThe present study investigates the synthesis and characterization of a zirconium oxide (ZrO2)-based metal composite doped with cerium (Ce) and yttrium (Y), using chromium (Cr) and nickel (Ni) as base metals. These constituents were selected for their superior mechanical properties and compatibility with the ceramic phase. High-purity powders were homogenized via high-energy ball milling, followed by cold pressing and sintering in a controlled atmosphere of hydrogen. The sintering process was conducted at temperatures ranging from 850 °C to 1350 °C to examine the evolution of microstructure, grain growth, and densification. Scanning electron microscopy (SEM) revealed a homogeneous distribution of phases, with distinct microstructural features attributed to each element at different sintering temperatures. The experimental results revealed that the composite’s density was increased by 30% and porosity was reduced by 61% at a sintering temperature of 1350 °C. The hardness and flexural strength of composite were found to be 23% and 60% higher at 1350 °C, respectively, compared to that at 850 °C, suggesting enhanced mechanical properties due to cerium and yttrium reinforcement within matrix and efficient doping and phase transformation. Overall, incorporation of cerium and yttrium significantly improved mechanical behavior and phase stability of ZrO2–Cr–Ni composite, highlighting its potential for advanced engineering applications.