Physiological responses in different intensities of resistance exercise – Critical load and the effects of aging process

Aim was to identify critical load (CL) in young and elderly apparently healthy male cohorts. To contrast the metabolic, cardiovascular and perceptual responses on CL according to age. We evaluated 12 young (23 ± 3 years) and 10 elderly (70 ± 2 years) apparently healthy active males, who underwent: (1) 1 repetition maximum (1RM) test on a 45° Leg Press; (2) on different days, three high-intensity resistance exercise constant load tests (60%, 75% and 90% 1RM) until fatigue (Tlim). Absolute values of both the CL asymptote and curvature constant (kg) were significantly lower in elderly subjects (P < 0.05). In contrast, elderly subjects demonstrated a significantly higher number of repetitions at CL when compared with young subjects (P < 0.05). As expected, oxygen uptake (VO₂) and heart rate (HR) during maximal aerobic exercise testing were significantly reduced in older subjects. However, percent-predicted aerobic capacity were higher in older subjects (P < 0.05). In addition, blood lactate ([La^?]) corrected to Tlim and rating of perceived exertion values were greater in younger subjects at all intensities (P < 0.05). These findings, despite reduced force production in older subjects, endurance-related parameters are well preserved according to age-adjusted percent-predicted values in apparently healthy males.     

Critical thinking,executive functions and their potential relationship

The central issue of this paper is to review the possible relationships between the constructs of critical thinking and executive functions. To do this, we first analyse the essential components of critical thinking from a psychological and neurological point of view. Second, we examine the scope of the cognitive and neurological nature of executive functions. Third, we propose a model for comparing or mapping between the most important processes of both constructs. Fourth, we offer some conclusions on the relational path between the two concepts based on the studies reviewed and suggest possible lines of investigation that will undoubtedly facilitate the understanding of shared features and key differences between critical thinking and executive functions.     

走向历史的诗学研究——乔依斯和鲁迅比较研究之七

乔依斯和鲁迅的小说都被传统历史批评家指责为缺乏历史。但按照新历史主义的理论，乔依斯和鲁迅在其文本中凸显了历史规则、历史因素，两人有意识地对传统的大写历史进行倒转和颠覆：揭示官方的历史下掩藏的卡列班主义，为读者提供了边缘化了的历史、“他者”的历史。他们强调历史的心理情感性，保持边缘意识，质询了大写历史。两人都从神话传说、历史故事中大量汲取文学素材、创作方法大胆地进行小说的文体实验。应用新历史主义文学理论去分析两人的文本，读者可以透过历史文化的深层去把握文学的本质。     

Trusting Virtual Trust

Can trust evolve on the Internet between virtual strangers? Recently, Pettit answered this question in the negative. Focusing on trust in the sense of ‘dynamic, interactive, and trusting’ reliance on other people, he distinguishes between two forms of trust: primary trust rests on the belief that the other is trustworthy, while the more subtle secondary kind of trust is premised on the belief that the other cherishes one’s esteem, and will, therefore, reply to an act of trust in kind (‘trust-responsiveness’). Based on this theory Pettit argues that trust between virtual strangers is impossible: they lack all evidence about one another, which prevents the imputation of trustworthiness and renders the reliance on trust-responsiveness ridiculous. I argue that this argument is flawed, both empirically and theoretically. In several virtual communities amazing acts of trust between pure virtuals have been observed. I propose that these can be explained as follows. On the one hand, social cues, reputation, reliance on third parties, and participation in (quasi-) institutions allow imputing trustworthiness to varying degrees. On the other, precisely trust-responsiveness is also relied upon, as a necessary supplement to primary trust. In virtual markets, esteem as a fair trader is coveted while it contributes to building up one’s reputation. In task groups, a hyperactive style of action may be adopted which amounts to assuming (not: inferring) trust. Trustors expect that their virtual co-workers will reply in kind while such an approach is to be considered the most appropriate in cyberspace. In non-task groups, finally, members often display intimacies while they are confident someone else ‘out there’ will return them. This is facilitated by the one-to-many, asynchronous mode of communication within mailing lists.     

The Influence of Hygroscopic Materials on the Fluctuation of Relative Humidity in Museums Located in Historical Buildings

ABSTRACT

The preservation of artefacts in museum collections is profoundly affected by fluctuations in temperature and, especially, relative humidity (RH). Since the late nineteenth century, many studies have been carried out on the best way to control hygrothermal conditions. In old buildings located in maritime temperate climate zones (such as Portugal) with strong thermal inertia, and which have low ventilation rate (relative to the volume and number of visitors), daily and seasonal hygroscopic inertia may help to assure the maintenance of RH stabilization conditions. The use of expensive active systems may be minimized through the passive behaviour of internal finishing building materials. This work presents the results of an experimental laboratory study conducted in a flow chamber to demonstrate the enormous potential of hygroscopic materials in stabilizing interior relative humidity. Based in these results and in-situ monitoring in a museum housed in a building, located in Porto, with a typical construction of the 1950s (granite masonry and reinforced concrete slabs), a numerical analysis was done to quantify the influence of hygroscopic materials in stabilizing the interior relative humidity.     

Knowing everything from soup to dessert: an exploratory study to describe what characterises students’ vocational knowledge

Students’ vocational knowledge can be defined as all knowledge students require performing within occupational practice. In the context of vocational education and training, students’ vocational knowledge is often discussed from a perspective of either what should be taught and learned in schools or different kinds of knowledge students should gain in occupational practice. Much less focus is on students’ vocational knowledge itself. This exploratory in-depth study aims to describe what characterises students’ vocational knowledge. To explore students’ vocational knowledge, an analytic framework is used to describe vocational knowledge characteristics specifying: (1) occupation-specific knowledge components, and (2) qualities. Results show the framework provides a structure to gain insight into the nature and meaning of vocational knowledge, and is valuable to describe characteristics in terms of knowledge components such as technical procedures or the social and occupational environment, and qualities such as richness, complexity and specificity. Additionally, to use an existing framework – originally developed in the contexts of ICT and Social Work – its usefulness is explored in a new context, namely, the hospitality industry. Recommendations about the framework serving as a potential tool to support students’ learning processes are provided.     

Spread or Sacrifice: Dilemma for Lighting Policies

ABSTRACT

Light sensitive objects will fade on display. Collection managers and curators face the dilemma whether to spread fading over several similar objects or sacrifice one. This paper describes an experiment in which participants were asked how they would want to pass on a collection of seventeenth century hand-coloured maps to coming generations. Results show that while colour changes are hardly visible, both public and professionals do not perceive them as damage and prefer to spread fading. Once fading becomes clearly visible in all maps, the preference shifts to sacrificing one map. The tipping point lies around five just noticeable changes. This information can be used when selecting objects for exhibition. The outcome also implies it would be prudent to assess the degree of fading of much exhibited objects and consider whether and when to choose for a sacrifice strategy.     

Within and Across Language Predictors of Word Learning Processes in Dual Language Learners

This study investigated the relation between Dual Language Learners’ (N = 90) vocabulary and grammar comprehension and word learning processes in preschool (aged 3-through-5 years). Of interest was whether: (a) performance in Spanish correlated with performance in English within each domain; and (b) comprehension predicted novel word learning within and across languages. Dual-language experience was evaluated as a potential moderator. Hierarchical linear modeling revealed stronger predictive associations within each language than across languages. Across languages, results varied by experience and domain. Structural sensitivity theory suggests exposure to two languages heightens awareness of parameters along which languages vary and provides a framework for interpreting complex associations within and across languages. Knowledge from one language may influence learning in both.     

体育产业概念理解及分类的研究

体育产业概念及分类在国内外都有很大的争议，通过对体育产业进行分析，且根据我国国情对体育产业概念及分类进行科学的界定。