Different Neural Mechanisms for the Comparison and Priming Distance Effects: An fMRI Study

Using functional magnetic resonance imaging, the present study examined whether the comparison distance effect (CDE) and the priming distance effect (PDE) in number processing had the same underlying neural mechanisms. 24 healthy participants completed a number comparison task and a number priming task in the scanner. Imaging data were examined for brain regions selected based on a meta-analysis of previous studies of number processing. Results revealed robust CDE and PDE at both behavioral and neural levels. The CDE had a significant hemodynamic signature in the right parietal cortex but not in the left parietal cortex, although a direct test of this hemispheric laterality did not reach statistical significance. In contrast, the PDE showed significant left-hemisphere laterality with a significant hemodynamic signature in the left parietal cortex but not in the right parietal cortex. These results suggested that the CDE and PDE had different underlying neural mechanisms

Proceedings of ACUN-5 Developments in Composites: Advanced, Infrastructural, Natural, and Nano-Composites

The topics of ACUN-5 will cover all aspects of the science and technology of composite materials, from materials fabrication, processing, manufacture, structural and property characterisation, theoretical analysis, modelling and simulation, materials design to a variety of applications, such as aerospace, automotive, infrastructure, packaging, ship-building, and recreational products. ACUN-5 will bring together the latest research and developments of the complete range of composite materials, including biocomposites, medical-composites, functional and smart composites, gradient and layered composites, nanocomposites, structural composites and mimicking natural materials. The reinforcements will range from nano-, micro-, meso- to macro-scale in polymer, metal, ceramic and cementitious matrices

Data from: Horizontal and vertical diversity jointly shape food web stability against small and large perturbations

The biodiversity of food webs is composed of horizontal (i.e. within trophic levels) and vertical diversity (i.e. the number of trophic levels). Understanding their joint effect on stability is a key challenge. Theory mostly considers their individual effects and focuses on small perturbations near equilibrium in hypothetical food webs. Here, we study the joint effects of horizontal and vertical diversity on the stability of hypothetical (modelled) and empirical food webs. In modelled food webs, horizontal and vertical diversity increased and decreased stability, respectively, with a stronger positive effect of producer diversity on stability at higher consumer diversity. Experiments with an empirical plankton food-web, where we manipulated horizontal and vertical diversity and measured stability from species interactions and from resilience against large perturbations, confirmed these predictions. Taken together, our findings highlight the need to conserve horizontal biodiversity at different trophic levels to ensure stability.,small_largeone6two3one6two3three1one6two4one6two4three1one6two5one6two5three1one7two3one7two4one7two4three1one7two3three1one7two5one7two5three1

Politics at the Boundary

In this conceptual essay, the authors argue that one way to understand the Chinese state is to view it from below, from the perspective of people advocating change. The authors' "state reflected in society" approach is illustrated with accounts of Chinese lawyers, journalists, and NGO leaders who operate at the boundary of the acceptable and are attentive to signals about what the authorities will tolerate. Their experiences suggest that mixed signals about the limits of the permissible is a key feature of the Chinese state. Beyond a number of well-patrolled "forbidden zones," the Chinese state speaks with many voices and its bottom line is often unclear. At the border of the uncontroversial and the unacceptable, the Chinese state is both a highcapacity juggernaut capable of demarcating no-go zones and a hodgepodge of disparate actors ambivalent about what types of activism it can live with. Whether mixed signals are deliberate or accidental is hard to determine, but they do offer the authorities certain advantages by providing a low-cost way to contain dissent, gather information, and keep options open. © 2012 SAGE Publications