The Design of a semi-prefabricated LVL-concrete composite floor

This paper describes the design of a novel semi-prefabricated LVL-concrete composite floor that has been developed in New Zealand. In this solution, the floor units made from LVL joists and plywood are prefabricated in the factory and transported to the building site. The units are then lifted onto the supports and connected to the main frames of the building and to the adjacent units. Finally, a concrete topping is poured on top of the units in order to form a continuous slab connecting all the units. Rectangular notches cut from the LVL joists and reinforced with coach screws provide the composite action between the concrete slab and the LVL joists. This system proved to be an effective modular solution that ensures rapid construction. A design procedure based on the use of the effective flexural stiffness method, also known as the “gamma method” is proposed for the design of the composite floor at ultimate and serviceability limit states, in the short and long term. By comparison with the experimental results, it is shown that the proposed method leads to conservative design. A step-by-step design worked example of this novel semi-prefabricated composite floor concludes the paper

Anteon ephippiger (Dalman, 1818) (Hymenoptera, Dryinidae) : a new dryinid record for the Maltese entomofauna

Short correspondence article about the Dryinidae family of wasps. The article mentions the only 3 records of this dryinid for the Maltese Islands.peer-reviewe

Understanding Power-related Strategies and Initiatives:The Case of the European Commission Green Paper on CSR

Purpose The purpose of this paper is to provide a theoretically informed analysis of a struggle for power over the regulation of corporate social responsibility (CSR) and social and environmental accounting and reporting (SEAR) within the European Union. Design/methodology/approach The paper combines insights from institutional theory (Lawrence and Buchanan, 2017) with Vaara et al.’s (2006) and Vaara and Tienar’s (2008) discursive strategies approach in order to interrogate the dynamics of the institutional “arena” that emerged in 2001, following the European Commission’s publication of a Green Paper (GP) on CSR policy and reporting. Drawing on multiple sources of data (including newspaper coverage, semi-structured interviews and written submissions by companies and NGOs), the authors analyse the institutional political strategies employed by companies and NGOs – two of the key stakeholder groupings who sought to influence the dynamics and outcome of the European initiative. Findings The results show that the 2001 GP was a “triggering event” (Hoffman, 1999) that led to the formation of the institutional arena that centred on whether CSR policy and reporting should be voluntary or mandatory. The findings highlight how two separate, but related forms of power (systemic and episodic power) were exercised much more effectively by companies compared to NGOs. The analysis of the power initiatives and discursive strategies deployed in the arena provides a theoretically informed understanding of the ways in which companies acted in concert to reach their objective of maintaining CSR and SEAR as a voluntary activity. Originality/value The theoretical framework outlined in the paper highlights how the analysis of CSR and SEAR regulation can be enriched by examining the deployment of episodic and systemic power by relevant actors.PostprintPeer reviewe

Independent circuits in basal ganglia and cortex for the processing of reward and precision feedback

In order to understand human decision making it is necessary to understand how the brain uses feedback to guide goal-directed behavior. The ventral striatum (VS) appears to be a key structure in this function, responding strongly to explicit reward feedback. However, recent results have also shown striatal activity following correct task performance even in the absence of feedback. This raises the possibility that, in addition to processing external feedback, the dopamine-centered reward circuit might regulate endogenous reinforcement signals, like those triggered by satisfaction in accurate task performance. Here we use functional magnetic resonance imaging (fMRI) to test this idea. Participants completed a simple task that garnered both reward feedback and feedback about the precision of performance. Importantly, the design was such that we could manipulate information about the precision of performance within different levels of reward magnitude. Using parametric modulation and functional connectivity analysis we identified brain regions sensitive to each of these signals. Our results show a double dissociation: frontal and posterior cingulate regions responded to explicit reward but were insensitive to task precision, whereas the dorsal striatum - and putamen in particular - was insensitive to reward but responded strongly to precision feedback in reward-present trials. Both types of feedback activated the VS, and sensitivity in this structure to precision feedback was predicted by personality traits related to approach behavior and reward responsiveness. Our findings shed new light on the role of specific brain regions in integrating different sources of feedback to guide goal-directed behavior

Long-lasting, kin-directed female interactions in a spatially structured wild boar social network

We thank W. Jędrzejewski for his support and logistical help in trapping wild boar. We are grateful to R. Kozak, A. Waszkiewicz and many students and volunteers for their help with fieldwork as well as to A. N. Bunevich, T. Borowik and local hunters for providing genetic samples. Genetic analyses were performed in the laboratory of the Department of Science for Nature and Environmental Resources, University of Sassari, Italy, with the help of L. Iacolina and D. Biosa. We are grateful to K. O’Mahony who revised English and to A. Widdig, K. Langergraber and one anonymous reviewer for valuable comments on the earlier version of the manuscript.Peer reviewedPublisher PD