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11.
Nuno Gil 《Research Policy》2007,36(7):980-999
This study defines a project safeguard as the design and physical development work needed to ensure, or enhance, the embedding of a real option in complex products and systems (CoPS). Safeguards operationalize optionlike strategic thinking at implementation. I examine safeguarding investments through an in-depth multiple-case study of 12 options embedded across 5 projects encompassed by an airport expansion programme. This includes options to phase out delivery (stage-option), grow capacity (growth-option), and switch operational regime (switch-option). Passive safeguards only involve design work, whereas active safeguards involve both design and physical execution. The analysis shows how the confluence between the uncertainty of option exercising and the modularity of the relevant functional elements in relation to the CoPS architecture affects the attractiveness of safeguarding. High uncertainty makes safeguarding less attractive as it can lead to sunk costs that may not pay off over the CoPS operating life. Conversely, high modularity increases the attractiveness of safeguarding because (1) safeguards can be limited to marginal investments at the interfaces between the functional elements with other CoPS subsystems, and (2) the stability of modular design rules increases the likelihood that safeguards remain valid over time. Safeguards build options into integrative CoPS. This flexibility and redundancy makes them resilient to change stemming from option exercising if uncertainties resolve favourably in the future. 相似文献
12.
Joana Cadima Carla Peixoto Teresa Leal 《European Journal of Psychology of Education - EJPE》2014,29(1):139-158
The observation and assessment of quality of teacher–child interactions in elementary school settings are increasingly recognized as important; however, research is still very limited in European countries. In this study, we examined the quality of the interactions between teacher and children in first-grade classrooms in Portugal and the extent to which structural features at teacher-, classroom-, and school-level explained variation in this quality. One hundred fifteen classrooms participated in the study. Classrooms were observed through a standardized rating scale concerning emotional, organizational, and instructional support. Results indicated that the levels of emotional and organizational support in most classrooms were of moderate quality, but the levels of instructional support were low, suggesting that most observed activities did not encourage students’ higher-order thinking skills. An examination of the associations between teacher and classroom characteristics and the quality of teacher–child interactions indicated a small effect for teacher education. Teachers with an advanced degree were more likely to be more emotionally sensitive and to have better instructional interactions in the classroom. For school-level characteristics, findings showed that the classrooms in private and smaller schools were likely to provide higher levels of emotional, organizational, and instructional quality. The results suggest that focusing on the interactions between teacher and children can provide valuable information to enhance classroom quality. 相似文献
13.
Barbara E. Moely Silvia S. Hart Linda Leal Kevin A. Santulli Nirmala Rao Terry Johnson Libby Burney Hamilton 《Child development》1992,63(3):653-672
The efforts of 69 elementary school teachers to instruct children in cognitive processing activities were observed. Although the teaching of such activities was relatively infrequent, it varied by grade (occurring more often in grades 2-3 than in higher or lower grades) and by the content of instruction. Teachers of grade 4 and above more often provided rationales for the use of cognitive strategies than did teachers of younger children. In a second study, children of three achievement levels were selected from classrooms in which teachers varied in their use of suggestions regarding cognitive processes. Subsequent to training in the use of a memory strategy, children's performance on a maintenance trial was evaluated: Among average and low achievers, those whose teachers were relatively high in strategy suggestions showed better maintenance and more deliberate use of the trained strategy than did children whose teachers rarely made strategy suggestions. The role of school experience in the development of children's memory skills is discussed. 相似文献
14.
ABSTRACTThe present study intends to analyze older adult perspectives on what determines sexual satisfaction in old age. Four hundred and twenty-one non-institutionalized older parti- 10 cipants from three different nationalities aged 65 to 97 years were interviewed. All narratives were submitted to content analysis. This study’s outcome originated five themes: positive communication (k =.94, p <.01); supportive partner (k =.82, p <.01); feeling attractive (k = 81, p <.01); good sexual activity (k =.97, p <.01); and eroticism (k =.98, p <.01). 15 This study highlighted different determinants of sexual satisfaction in old age and emphasized the importance of positive communication and a supportive partner for older adults. 相似文献
15.
Pedro Nuno Teixeira Vera Rocha Ricardo Biscaia Margarida Fonseca Cardoso 《Higher Education》2012,63(3):337-352
The expansion of higher education systems has often been associated with the need for increasing diversification, namely at
the program level, based on the pressures to adapt more general programmes to a more diverse student population and multiple
regional, social, and economic needs. This paper explores empirically the question of programme diversity by drawing on the
Portuguese higher education’ experience, which presented massive expansion during the last decades and significant institutional
competition in recent years. The study provides a longitudinal approach and analyzes in detail the evolution of diversification
and specialization of the public and private sectors, as well as the university and polytechnic subsectors. The analysis aims
at helping to illustrate the relevance of analysing diversity from an empirical point of view and its contribution to our
understanding of the complex relationships between competition and diversity in contemporary higher education. 相似文献
16.
Wolfgang Tietze Joaquim Bairrão Teresa Barreiros Leal Hans-Guenther Rossbach 《European Journal of Psychology of Education - EJPE》1998,13(2):283-298
Based on the knowledge that direct assessment of the quality of early childhood educational environments is becoming more and more important, this article deals with a coordinated adaptation of the Early Childhood Environment Rating Scale (ECERS) in Germany and Portugal. The ECERS, developed by Harms and Clifford (1980), is a complex rating scale, comprising 37 items, which is implemented to assess major quality characteristics of early childhood classrooms and has been used quite extensively in the US as well as in other countries. In this article we describe how the scale was adapted and we report selected results of a jointly coordinated comparative study on a sample of 103 early childhood classrooms in Germany and 88 in Portugal. The classrooms were classified according to three different types in each country. In particular, we report the item characteristics of the adapted versions, reliabilities and intercorrelations of the total scale and the apriori-subscales, and results of factor analyses. A one-way ANOVA indicates group differences between the six types of classrooms which can be meaningfully interpreted. 相似文献
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Hosting sporting mega-events involve considerable investment in and significant engagement with local communities. This paper contributes to the burgeoning literature about sporting mega event’s socio-geographical impacts on tourism, employment, urban regeneration, and socio-economic and cultural benefits. Within the context of 2014 FIFA World Cup in Brazil, we assess, utilizing interview data from local communities, the impact of the construction of the 2014 World Cup’s opening venue, ‘Arena Corinthians’ soccer stadium, in Itaquera, as well as other infrastructure developments more widely in the East Zone of São Paulo. The results point to the diversity of opinions among the resident community about the real legacies resulting from this sport mega-event. 相似文献
19.
The aim of this study was to build a structural model to explore the predictors of adjustment to aging (AtA) in a community-dwelling older population. A community-dwelling sample of 1,270 older adults aged between 75 and 102 years answered a questionnaire to determine sociodemographic (sex, age, professional and marital status, education, household, adult children, family's annual income, living setting, and self-reported spirituality), lifestyle, and health-related characteristics (perceived health, recent disease, medication, and leisure). Several instruments were used to assert psychological variables, namely AtA, sense of coherence, and subjective well-being. Structural equation modeling was used to explore a structural model of the self-reported AtA, encompassing all variables. Significant predictors are self-reported spirituality (β = .816, p < .001); perceived health (β = .455, p < .001); leisure (β = .322, p < .001); professional status (β = .283, p < .001); income (β = .230, p = .035); household (β = –.208, p = .007); sense of coherence (β = ?.202, p = .004); and adult children (β = .164, p = .011). The variables explain, respectively, 60.6% of the variability of AtA. Self-reported spirituality is the strongest predictor of AtA. Other predictors are perceived health, leisure, professional status, income, household, sense of coherence, and adult children. This study emphasizes the need for deepening the variables that influence older adults’ AtA—in particular, perceived health and further lifestyle-related characteristics—as being relevant for promoting aging well in later life, within a salutogenic context for health care. 相似文献
20.
Ainara Zornoza-Indart Paula Lopez-Arce Karima Zoghlami Nuno Leal Joaquim Simão 《文物保护研究》2013,58(2):73-89
ABSTRACTCalcarenite stone samples from a historic building (Bizerte, Tunisia) were collected and treated under different environmental conditions with several consolidating products: alkoxysilane (ethyl silicate), a surfactant-templated novel sol–gel, Ca(OH)2, and SiO2 nanoparticles. These were subjected to marine aerosol accelerated aging cycles and studied by several non-destructive tests and techniques to assess the stability of the products. Results show that weathering caused by salt crystallization is not inhibited but it is slowed down due to the enhancement of superficial mechanical properties (surface cohesion and micro-hardness) achieved after one month of treatments application. A high or low relative humidity of the consolidation environment significantly affects the final mechanical and aesthetical physical properties and therefore conditions the durability of the treated substrates, even producing higher damage than observed in the blank specimens, depending on the product. 相似文献