Elaboração e validação da Escala de Depressão para Idosos Elaboration and validation of the Depression Scale for the Elderly

O objetivo deste estudo foi desenvolver e validar a Escala de Depressão para Idosos (EDI). Foi elaborado um modelo teórico explicativo da depressão, composto por três categorias: cognitiva, afetiva e somático-motora. Os itens elaborados foram submetidos à análise semântica e de juizes. O instrumento piloto foi aplicado a 340 sujeitos, sendo 88% do sexo feminino, com ensino fundamental completo (67,9%) e idade média de 63,74 (DP = 6,87) anos. A amostra respondeu também ao Inventário de Depressão de Beck (BDI). Para a validação da escala, foram realizadas análises fatoriais e análise da consistência interna dos itens (alfa de Cronbach). Regressões múltiplas avaliaram o poder de predição dos fatores da EDI sobre o escore final do BDI. A validação da escala demonstrou que a EDI é composta por dois fatores: cognitivo-afetivo e somático-motor, que explicam 53% do BDI (validade convergente). Pode-se afirmar, portanto, que a EDI é formada por fatores que avaliam diferentes aspectos do constructo depressão (validade fatorial), os quais apresentam índices de consistência interna dentro dos padrões psicométricos.<br>The objective of this study was to develop and validate the Depression Scale for the Elderly. An explanatory theoretical model was developed for depression, consisting of three categories: cognitive, affective, and somato-motor. The items elaborated thusly were submitted to semantic analysis and judges. The pilot instrument was applied to 340 subjects, 88% of whom were females, mostly with complete primary education (67.9%), and a mean age of 63.74 (SD = 6.87) years. The sample also responded to the Beck Depression Index (BDI). Validation of the scale was based on factor analyses (Principal Axis Factoring) and analysis of the items' internal consistency (Cronbach's alpha). Multiple regressions evaluated the predictive power of the factors in the depression scale for the elderly on the final BDI score. Scale validation demonstrated that the depression scale for the elderly is composed of two factors: cognitive-affective and somato-motor, which explain 53% of the BDI (convergent validity). One can thus state that the depression scale for the elderly consists of factors that assess different aspects of the depression construct (factor validity), which present internal consistency indices within the psychometric standards

Biological Invasions in South Africa's Urban Ecosystems: Patterns, Processes, Impacts and Management

This chapter provides an overview of the researchers and research initiatives relevant to invasion science in South Africa over the past 130 years, profiling some of the more recent personalities, particularly those who are today regarded as international leaders in the field. A number of key points arise from this review. Since 1913, South Africa has been one of a few countries that have investigated and implemented alien plant biological control on a large scale, and is regarded as a leader in this field. South Africa was also prominent in the conceptualisation and execution of the international SCOPE project on the ecology of biological invasions in the 1980s, during which South African scientists established themselves as valuable contributors to the field. The development of invasion science benefitted from a deliberate strategy to promote multi-organisational, interdisciplinary research in the 1980s. Since 1995, the Working for Water programme has provided funding for research and a host of practical questions that required research solutions. Finally, the establishment of a national centre of excellence with a focus on biological invasions has made a considerable contribution to building human capacity in the field, resulting in advances in all aspects of invasion science—primarily in terms of biology and ecology, but also in history, sociology, economics and management. South Africa has punched well above its weight in developing the field of invasion science, possibly because of the remarkable biodiversity that provided a rich template on which to carry out research, and a small, well-connected research community that was encouraged to operate in a collaborative manner

A novel rpotein-mineral interface

Transferrins transport Fe3+ and other metal ions in mononuclear-binding sites. We present the first evidence that a member of the transferrin superfamily is able to recognize multi-nuclear oxo-metal clusters, small mineral fragments that are the most abundant forms of many metals in the environment. We show that the ferric ion-binding protein from Neisseria gonorrhoeae (nFbp)readily binds clusters of Fe3+, Ti4+, Zr4+ of Hf4+ in solution. The 1.7A resolution crystal structure of Hf-nFbp reveals three distinct types of clusters in an open, positively charged cleft between two hinged protein domains. A di-tyrosol cluster nucleation motif (Tyr195-Tyr196) is situated at the bottom of this cleft and binds either a trinuclear oxo-Hf cluster, which is capped by phosphate, or a pentanuclear cluster, which in turn can be capped with phosphate. This first high-reesolution structure of a protein-mineral interface suggests a novel metal-uptake mechanism and provides a model for protein-mediated mineralization/dissimilation, which plays a critical role in geochemical processes

Students in Mass Higher Education: Effects of Student Engagement in Taiwan

[[abstract]]With the massification of higher education, the pursuit of university teaching excellence has become a global concern. Numerous studies report that student learning is still a public concern. This chapter explores whether, after the massification of higher education in Taiwan, efforts to improve instruction have improved student engagement. This study examines the measurement of student engagement, learning-related experiences, performance, and satisfaction, while considering gender, students’ major public or private education, and differences in the year of study. Student engagement has been classified into behavioral, cognitive, and emotional types. The related statistical analyses were used to present the current status and identify key learning issues on the campus. The findings may prove useful in ameliorating problems of student learning in current higher education