This book presents Tocqueville’s vision of the European continent, exploring his ideas of liberty, virtue, religion, patriotism, civic participation and democracy. Although Tocqueville is often revered as a classic writer on the subject of American democracy, this book focuses on the multifaceted importance of his ideas within a European context.

Development of the nematode Caenorhabditis elegans has been described completely on a cell‐by‐cell basis. In an invariant pattern five somatic founder cells and the primordial germ cell are generated within the first hour after the onset of cleavage. Using a laser microbeam for manipulation of individual blastomers several aspects of early embryogenesis have been investigated, including the expression of cellular polarity, the localization of lineage‐specific cleavage potential, the necessity for early cell–cell interaction, and the control of differential cell‐cycle timing. The (...) experiments demonstrate the central importance of a correct partitioning of cytoplasmic components during early embryogenesis and suggest a stepwise, binary segregation mechanism associated with the unequal cleavages in the germline. (shrink)

Comparative analysis of nematode development has revealed considerable variations in how the fates of embryonic cells are specified. Such early variations seem enigmatic as they do not influence the resultant structure or performance of the emerging animal. Three different nematode species are used to consider why alternative ways to reach the same goal may have been established during evolution and why early steps of embryogenesis are particularly variable. A scenario is sketched with a shift from late to early cell specification, (...) along with an increase in maternal contribution and developmental tempo and a decrease in regulative potential expressing different developmental strategies. Future studies of larger numbers of species are needed to assess the extent of such variations and to understand more fully the under lying mechanisms, rules and driving forces. BioEssays 23:841–847, 2001. © 2001 John Wiley & Sons, Inc. (shrink)

Ein christlich-religiöses Verständnis des Lebens ist eng verbunden mit dem Bewusstsein der Grenzen eigener Möglichkeiten bzw. einer spezifischen Verarbeitung des Scheiterns am Vollkommenheitsideal. Dieses Wissen ist nicht nur eine Überzeugung, sondern es wird in der Gestalt vielfältiger Praktiken inkorporiert und verinnerlicht. Der Aufsatz entfaltet diesen Zusammenhang am Beispiel der protestantischen Bestattungskultur in Geschichte und Gegenwart.

I show that quantum theory is the only probabilistic framework that permits arbitrary processes to be emulated by sequences of local measurements. This supports the view that, contrary to conventional wisdom, measurement should not be regarded as a complex phenomenon in need of a dynamical explanation but rather as a primitive—and perhaps the only primitive—operation of the theory.

The leitmotif of the German contribution to the 12th Architecture Biennial in Venice, “desire“, is at the same time the topic of a survey among architects ; answers are given through drawings. What are you longing for? The response drawings are highly individual, diversity becomes programme: both in picture language and in the presentation in terms of content, reactions are quite different. But there is one thing they all have in common: the burning desire of something concrete. Sometimes it spreads (...) lightning-like on the observer, sometimes time is required for a contemplative involvement with form and content. The architectural sketch, as it may seem, degenerated into a side product of architectural work within the last years, is back! (shrink)

Vida y obra de cuatro ilustres pensadores norteños: Hildebrando Castro Pozo, Mariano Iberico Rodríguez, Antenor Orrego Espinoza y Víctor Raúl Haya de la Torre. Con énfasis en el pensamiento filosófico, sociológico y político de cada uno.

Conceptual understanding of representations and fluency in using representations are important aspects of expertise. However, little is known about how these competencies interact: does representational understanding facilitate learning of fluency, or does fluency enhance learning of representational understanding? We analyze log data obtained from an experiment that investigates the effects of intelligent tutoring systems support for understanding and fluency in connection-making between fractions representations. The experiment shows that instructional support for both representational understanding and fluency are needed for students to (...) benefit from the ITS. In analyzing the ITS log data, we contrast the understanding-first hypothesis and the fluency-first hypothesis, testing whether errors made during the learning phase mediate the effect of experimental condition. Finding that a simple statistical model does not the fit data, we searched over all plausible causal path analysis models. Our results support the understanding-first hypothesis but not the fluency-first hypothesis. (shrink)