The comprehension of living organisms in all their complexity poses a major challenge to the biological sciences. Recently, systems biology has been proposed as a new candidate in the development of such a comprehension. The main objective of this paper is to address what systems biology is and how it is practised. To this end, the basic tools of a systems biological approach are explored and illustrated. In addition, it is questioned whether systems biology ‘revolutionizes’ molecular biology and ‘transcends’ its (...) assumed reductionism. The strength of this claim appears to depend on how molecular and systems biology are characterised and on how reductionism is interpreted. Doing credit to molecular biology and to methodological reductionism, it is argued that the distinction between molecular and systems biology is gradual rather than sharp. As such, the classical challenge in biology to manage, interpret and integrate biological data into functional wholes is further intensified by systems biology’s use of modelling and bioinformatics, and by its scale enlargement. (shrink)

A vast stream of empirical work has revealed that coach and athlete leadership are important determinants of sport teams’ functioning and performance. Although coaches have a direct impact on individual and team outcomes, they should also strive to stimulate athletes to take up leadership roles in a qualitative manner. Yet, the relation between coach leadership behavior and the extent of high-quality athlete leadership within teams remains underexposed. Based on organizational justice theory and the social identity approach, the present research tested (...) whether perceived justice of the coach positively predicts the quality of athlete leadership. Furthermore, we examined the role of group dynamic processes within this relation. Belgian volleyball and basketball players were asked to rate the justice of their coach, their team identification, the task cohesion, and the athlete leadership quality in the team. Structural equation modeling indicated that coaches’ perceived justice positively predicted the quality of athletes’ leadership, and that this relation was established through three intermediate steps. These results suggest that fair coach behavior does not only bridge the gap between leadership and followership, it also has the potential to improve the quality of athletes’ leadership within sport teams. More specifically, findings suggest that coaches’ perceived justice cultivates a shared social identity characterized by high levels of players’ identification with their team, which in turn increased their perceptions of the team’s task cohesion. Finally, this increased task cohesion encouraged the athlete leaders to demonstrate high-quality leadership. (shrink)

Food media have become a formidable part of adolescents’ food environments. This study sought to explore how and why adolescents use food media by focusing on selectivity and motives for consumption. We conducted in-depth, semi-structured interviews with 31 Flemish adolescents aged 12 to 16. Food media were both incidentally consumed and selectively sought for education, social utility, and entertainment. The levels of selectivity and motives for consumption varied among the different food media platforms. Incidental consumption was more prevalent with TV (...) cooking shows compared to online food media. The dominant motives for TV cooking show consumption were companionship and entertainment, while online food media were used for a more diverse range of motives dominated by information/inspiration and social interaction. Some participants consumed food media to get motivation and inspiration to improve health and fitness while others consumed food media to watch appetizing and aesthetically pleasing food content. The social environment in the form of friends and family as well as existing food preferences were dominant psychosocial factors for both traditional and online food media use. Future research is warranted to explore how incidental exposure and the identified motives for use relate to food media effects. (shrink)

What determines if the first interaction between strangers will be a pleasant experience? We conducted an experiment to investigate the extent to which the perceived quality of an interaction is influenced by conversation content and context, and we document the physiological changes that are likely to play a role in establishing rapport. Females who did not know each other met in pairs and conducted a gossip- or creativity task, either face-to-face or online. The conversation content had no effect on the (...) quality of online interactions. However in the face-to-face condition gossip was associated with better interaction quality. Tonic electrodermal activity steadily declined throughout the interaction, while phasic electrodermal activity first peaked and then returned to baseline. Neither were related to perceived interaction quality. Heart rate variability dropped at first but then remained stable. A smaller drop in HRV drop corresponded to higher ratings of rapport and liking. Together these results suggest that gossip can improve the quality of a face-to-face interaction between strangers, and support the conjecture that parasympathetic activity is a marker of human openness to social engagement. (shrink)

Parents play an important part in adolescents’ life and significantly contribute to youngsters’ academic success. However, parents’ and students’ perceptions regarding parental involvement may diff...

In this paper we present two compatible hypotheses to explain interest in celebrity gossip. The Learning Hypothesis explains interest in celebrity gossip as a by-product of an evolved mechanism useful for acquiring fitness-relevant survival information. The Parasocial Hypothesis sees celebrity gossip as a diversion of this mechanism, which leads individuals to misperceive celebrities as people who are part of their social network. Using two preliminary studies, we tested our predictions. In a survey with 838 respondents and in-depth interviews with 103 (...) individuals, we investigated how interest in celebrity gossip was related to several dimensions of the participants’ social lives. In support of the Learning Hypothesis, age proved to be a strong predictor of interest in celebrities. In partial support of the Parasocial Hypothesis, media exposure, but not social isolation, was a strong predictor of interest in celebrities. The preliminary results support both theories, indicate that across our life span celebrities move from being teachers to being friends, and open up a list of future research opportunities. (shrink)

Report of the symposium 'Towards a Philosophy of Systems Biology' held at the Vrije Universiteit of Amsterdam (VUA), the Netherlands, from 2 to 3 June 2005.

This study aims to understand how and why emerging adults come into contact with food media messages, and what they perceive as positive and negative outcomes related to food literacy. Seven focus groups, stratified by gender and socio-economic status, with 37 emerging adults aged between 18 and 25 were conducted. Photovoice was used to reflect on participants’ real-life food media experiences. Findings reveal that food media consumption is a combination of actively searching and incidentally encountering. The results suggest that food (...) media messages attract emerging adults’ attention by bringing content in an entertaining, engaging, and appealing way, and featuring popular food personalities. Finally, food media messages were perceived to both enhance and distort food literacy. The results show how food media messages for food literacy interventions can be designed in order to attract emerging adults’ attention and fulfill their specific needs. (shrink)

Keine ausführliche Beschreibung für "Die falsche Objektivität" verfügbar.

In his dialogues Plato has frequently expanded ideas that he considered wrong from the start into new and interesting theories, only to throw them, it seems, demonstratively into his waste paper basket. Some of them have been taken out again only much later and have been declared, without mentioning their originator, to be milestones of progress. The paper illustrates Plato's intriguing play with theories by the example of the Cratylus, and then proceeds to two further examples that at the same (...) time display the fundamental difference between Plato's view of human nature, and that of philosophers who have adopted his discarded thoughts after over 2000 years: the hedonistic calculus in the Protagoras, and the rationalistic foundation of law in the Republic. (shrink)

Keine ausführliche Beschreibung für "Die großen Fragen" verfügbar.

There is a strange contrast between, on the one hand, the prominent place generally assigned to Parmenides in the history of Greek philosophy, and on the other hand, the persistent uncertainty in the understanding of his teachings, as demonstrated by the large number of conflicting interpretations. In particular, there is no consent on the question whether Parmenides, in spite of the obvious weaknesses of his arguments, ought to be seen as the first proponent of a purely rational metaphysics, or whether, (...) in view of his assertion of the unreality of change and plurality and of the identity of thinking and being, we should first of all view him as a precursor of Plotinus, or even as a mediator between Indian Advaita-philosophy and Neo- Platonism. That question is the central issue considered in this paper. For it, only the first part of Parmenides’ poem is relevant: his “way of truth”. (shrink)