منابع مشابه
Dev115493 1305..1314
The genetic control of mammalian epithelial polarity and dynamics can be studied in vivo at cellular resolution during morphogenesis of the mouse neural tube. Themouse neural plate is a simple epithelium that is transformed into a columnar pseudostratified tube over the course of ∼24 h. Apical F-actin is known to be important for neural tube closure, but the precise roles of actin dynamics in t...
متن کاملTemporal dynamics of online petitions
Online petitions are an important avenue for direct political action, yet the dynamics that determine when a petition will be successful are not well understood. Here we analyze the temporal characteristics of online-petition signing behavior in order to identify systematic differences between popular petitions, which receive a high volume of signatures, and unpopular ones. We find that, in lin...
متن کاملDmd052258 1300..1305
Acrolein is an electrophilic a,b-unsaturated aldehyde of industrial, pharmaceutic, and toxicologic importance to which we are exposed in environmental, occupational, and therapeutic situations. Acrolein is known to exert different biologic effects through reactions with cellular macromolecules such as DNA, certain proteins, or glutathione. In many situations (such as in tobacco smoke or other f...
متن کاملModeling the Rise in Internet-based Petitions
Collective action taking place on Internet platforms leaves a digital imprint which may be harvested to better understand the dynamics of mobilization. This ‘big data’ offers social science researchers the potential for new forms of analysis, using real-time transactional data based on entire populations, rather than sample-based surveys of what people think they did or might do. This paper use...
متن کاملBroadening Participation Through E-Petitions? An Empirical Study of Petitions to the German Parliament
Petitioning is a well established form of political participation in most liberal democracies, but little is known about petitioners, their socio-demographics, motivations and assessments of petitioning processes. In 2005, the German parliament introduced public e-petitions which are submitted, signed and discussed on the Internet. This article reports a 2007 survey of 571 traditional and 350 e...
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ژورنال
عنوان ژورنال: The English Historical Review
سال: 1921
ISSN: 0013-8266,1477-4534
DOI: 10.1093/ehr/xxxvi.cxliv.554