Scaling laws in bacterial genomes: A side-effect of selection of mutational robustness?

In the past few years, numerous research projects have focused on identifying and understanding scaling properties in the gene content of prokaryote genomes and the intricacy of their regulation networks. Yet, and despite the increasing amount of data available, the origins of these scalings remain an open question. The RAevol model, a digital genetics model, provides us with an insight into the mechanisms involved in an evolutionary process. The results we present here show that (i) our model reproduces qualitatively these scaling laws and that (ii) these laws are not due to differences in lifestyles but to differences in the spontaneous rates of mutations and rearrangements. We argue that this is due to an indirect selective pressure for robustness that constrains the genome size

Is critique possible in the study of lived religion? Anthropological and feminist reflections

This article, based on the author’s fieldwork in a Catholic context, aims to theorise the dilemmas of taking seriously religious worlds at precisely those moments when they may be in tension with academic worldviews in terms of epistemology and ontology. The lived religion approach has emerged as a critical enterprise which serves as a corrective to more text-based or macro-sociological approaches, developing a form of radical non-reductionism and a preference for ethnographic approaches. This article aims to explore this critical edge of the lived religion approach further to address the modernist legacy in the study of religion. It will do so by bringing two anthropological approaches into the conversation that both challenge, albeit in different ways, the modernist underpinnings of studying religion within anthropology: phenomenological anthropology and what is called ‘the ontological turn’. The second part of the article centres on the question whether critique is possible in the pursuit of a non-reductionist approach to studying lived religion, taking up the question ‘is critique secular?’ posed by Talal Asad et al. This article suggests ways to take the impossibility of critique forward by following up some directions within the anthropological approaches already presented and linking this with feminist thinking on the status and role of academic knowledge

Introduction: Theorizing Lived Religion

The introduction to this special issue describes the emergence of the lived religion approach in relation to other approaches within the study of religion and sociology of religion as a way of going beyond the emphasis on texts and institutions, on the one hand, and the focus on the fate of religion in modern times, on the other hand. It also introduces the aim of this special issue, namely ‘theorizing’ lived religion. To do this, the authors summarize how the founders of this approach have conceptualized the topic of ‘lived religion’, adjacent approaches, and the theoretical underpinnings of their work. The authors propose three directions to develop the contribution a lived religion approach might make to theorizing: 1) explicating what is meant by ‘religion’ by drawing on work that studies religion as a category; 2) explicating how concepts and theories are developed based on lived religion research, with particular emphasis on the way tensions between modernist, disenchanting epistemologies and the enchanted, supernatural worlds of practitioners may inform theory and methodological reflection; 3) anchoring the doing of research, emphasizing the full research cycle in religious studies programs so that students have a solid basis for learning how to move back and forth between carrying out original research and conceptual/theoretical work

Why the Dutch (Think They) Break Taboos:Challenging Contemporary Presentations of the Role of Religious Actors in Narratives of Sexual Liberation

In contemporary approaches to sexual health in the Netherlands, religion and culture are often framed as a source of taboos that need to be broken in order to create more openness around sexuality. This view is often projected onto migrants with a religious background and onto other parts of the world that are ‘still’ religious. In this article, we suggest that one element to developing a more inclusive approach is to question existing narratives of ‘sexularism’ and to acknowledge that both religious and secular actors have historically been involved in the search for better ways of approaching sexual health and sexuality in the Netherlands. In contemporary characterizations of Dutch culture, the sexual revolution is referenced as a time in Dutch history when religious small-mindedness around sexuality was dismantled through a series of transgressive media events. Iconic moments in the sexual revolution have become ingrained in a collective memory of the 1960s as liberation from the firm grip of religion on peoples’ intimate lives. In this article we argue that the contemporary Dutch equation of secularization with openness around sexuality obscures a more complex dynamic between conservative and progressive forces within Dutch religious history. Based on existing research, we show that openness around sexuality was taking shape from within Catholic and Protestant communities and being materialized in new discourses, services and practices around sexuality in the 1950s and 1960s. Frictions between Protestants and Catholics, the clergy and the people, and liberal and conservative circles were part and parcel of some of the iconic moments that are now considered to have shaped Dutch culture

Pioneer Venus polarimetry and haze optical thickness

The Pioneer Venus mission provided us with high-resolution measurements at four wavelengths of the linear polarization of sunlight reflected by the Venus atmosphere. These measurements span the complete phase angle range and cover a period of more than a decade. A first analysis of these data by Kawabata et al. confirmed earlier suggestions of a haze layer above and partially mixed with the cloud layer. They found that the haze exhibits large spatial and temporal variations. The haze optical thickness at a wavelength of 365 nm was about 0.06 at low latitudes, but approximately 0.8 at latitudes from 55 deg poleward. Differences between morning and evening terminator have also been reported by the same authors. Using an existing cloud/haze model of Venus, we study the relationship between the haze optical thickness and the degree of linear polarization. Variations over the visible disk and phase angle dependence are investigated. For that purpose, exact multiple scattering computations are compared with Pioneer Venus measurements. To get an impression of the variations over the visible disk, we have first studied scans of the polarization parallel to the intensity equator. After investigating a small subset of the available data we have the following results. Adopting the haze particle characteristics given by Kawabata et al., we find a thickening of the haze at increasing latitudes. Further, we see a difference in haze optical thickness between the northern and southern hemispheres that is of the same order of magnitude as the longitudinal variation of haze thickness along a scan line. These effects are most pronounced at a wavelength of 935 nm. We must emphasize the tentative nature of the results, because there is still an enormous amount of data to be analyzed. We intend to combine further polarimetric research of Venus with constraints on the haze parameters imposed by physical and chemical processes in the atmosphere