The balance between births and deaths in an age-structured population is strongly influenced by the spatial distribution of sub-populations. Our aim was to describe the demographic process of a fish population in an hierarchical dendritic river network, by taking into account the possible movements of individuals. We tried also to quantify the effect of river network changes (damming or channelling) on the global fish population dynamics. The Salmo trutta life pattern was taken as an example for.We proposed a model which (...) includes the demographic and the migration processes, considering migration fast compared to demography. The population was divided into three age-classes and subdivided into fifteen spatial patches, thus having 45 state variables. Both processes were described by means of constant transfer coefficients, so we were dealing with a linear system of difference equations. The discrete case of the variable aggregation method allowed the study of the system through the dominant elements of a much simpler linear system with only three global variables: the total number of individuals in each age-class. (shrink)

The focus of this study was to analyze the content, distribution, and comparative genome relationships of 996 chromosome bin-mapped expressed sequence tags accounting for 2266 restriction fragments on the homoeologous group 3 chromosomes of hexaploid wheat. Of these loci, 634, 884, and 748 were mapped on chromosomes 3A, 3B, and 3D, respectively. The individual chromosome bin maps revealed bins with a high density of mapped ESTs in the distal region and bins of low density in the proximal region of the (...) chromosome arms, with the exception of 3DS and 3DL. These distributions were more localized on the higher-resolution group 3 consensus map with intermediate regions of high-mapped-EST density on both chromosome arms. Gene ontology classification of mapped ESTs was not significantly different for homoeologous group 3 chromosomes compared to the other groups. A combined analysis of the individual bin maps using 537 of the mapped ESTs revealed rearrangements between the group 3 chromosomes. Approximately 232 of the consensus mapped ESTs matched sequences on rice chromosome 1 and revealed large- and small-scale differences in gene order. Of the group 3 mapped EST unigenes ∼21 and 32% matched the Arabidopsis coding regions and proteins, respectively, but no chromosome-level gene order conservation was detected. (shrink)

The book provides a comprehensive state-of-the-art overview of current research on cognitive and applied aspects of eye movements. The contents include peer-reviewed chapters based on a selection of papers presented at the 11th European Conference on Eye Movements (Turku, Finland 2001), supplemented by invited contributions. The ECEM conference series brings together researchers from various disciplines with an interest to use eye-tracking to study perceptual and higher order cognitive functions. The contents of the book faithfully reflect the scope and diversity of (...) interest in eye-tracking as a fruitful tool both in basic and applied research. It consists of five sections: visual information processing and saccadic eye movements; empirical studies of reading and language production; computational models of eye movements in reading; eye-tracking as a tool to study human-computer interaction; and eye movement applications in media and communication research. Each section is concluded by a commentary chapter by one of the leading authorities in the field. These commentaries discuss and integrate the contributions in the section and provide an expert view on the most significant present and future developments in the respective areas. The book is a reference volume including a large body of new empirical work but also principal theoretical viewpoints of leading research groups in the field. (shrink)

Les principaux problèmes que Bultmann a posés au plan de l’exégèse historique des textes évangéliques étaient commandés par des positions théologiques et continuent pour ce motif à interroger les théologiens catholiques, qui parfois le rejettent dans le camp tantôt du scientisme tantôt du dogmatisme.Contre la théologie libérale des « vies de Jésus », il élève une double protestation, d’ordre christologique : il revendique le caractère historique de la foi chrétienne, et historique : il prend au sérieux la visée eschatologique de (...) la prédication de Jésus. Marquée en ses origines par un rationalisme dogmatique, l’exégèse historico-critique travaille à son tour la théologie, l’oblige à assumer sa propre historicité et à sortir ainsi de son propre positivisme dogmatique.Réservant – à juste titre – à la foi de dire le sens de la Croix, Bultmann semble séparer le fait et le sens et mettre l’historiographie et la théologie en rapport contradictoire de double vérité. Nous savons mieux aujourd’hui qu’il n’y a de faits qu’interprétés ; la foi atteint la vérité historique des faits, mais doit renoncer à demander de les établir « scientifiquement » à une historiographie censée « objectivement neutre ». En soutenant que le sens de la Croix relève d’une décision de foi, Bultmann nous rappelle utilement, ainsi que l’a reconnu R. Marlé, qu’on ne peut jamais évacuer le skandalon de la foi.The principal problems that Bultmann presented as regards the historical exegesis of evangelical texts were guided by theological positions and continued, for this reason, to question Catholic theologians, who sometimes put him in the camp of scientism and sometimes in that of dogmatism.Against the liberal theology of the “lives of Jesus”, he raised a double protest : of a christological nature and of a historical nature . Marked in its origins by dogmatic rationalism, historical-critical exegesis works in its turn on theology, obliges it to assume its own historicity and this to escape from its own dogmatic positivism.Allowing faith – and for good reason – to decide the meaning of the Cross, Bultmann seems to separate the fact and the meaning and to put historiography and theology in contradictory rapport of a double truth. We know better today that there are only interpreted facts ; faith attains the historical truth of facts, but must renounce the demand to establish them “scientifically” to a historiography believed to the “objectively neutral”. In holding that the meaning of the Cross depends on a decision of faith, Bultmann helpfully reminds us, as R. Marlé recognized, that one can never escape the skandalon of faith. (shrink)

From the 5th edition of Beauchamp and Childress' Principles of Biomedical Ethics, the problem of common morality has been given a more prominent role and emphasis. With the publication of the 6th and latest edition, the authors not only attempt to ground their theory in common morality, but there is also an increased tendency to identify the former with the latter. While this stratagem may give the impression of a more robust, and hence stable, foundation for their theoretical construct, we (...) fear that it comes with a cost, namely the need to keep any theory in medical ethics open to, and thereby aware of, the challenges arising from biomedical research and clinical practice, as well as healthcare systems. By too readily identifying the moral life of common morality with rule-following behaviour, Beauchamp and Childress may even be wrong about the nature of common morality as such, thereby founding their, by now, classic theory on quicksand instead of solid rock. (shrink)