Play the impulse game -- Involve them -- The experiential imperative -- Incentivize intelligently -- Sell with scarcity -- Build consistency -- Reciprocity rules -- Social validation -- Arm yourself with authority -- Like and be loved -- Drive discovery -- Be purpose driven -- Deliver zmots -- Flip the funnel -- Interest pays -- Sell shovels -- Shopping first, social second -- Sell to niche markets -- Get rated. get reviewed -- Go mobile
This paper argues that despite 50 years of empirical research, the phenomenon of social contagion is still poorly understood. Social contagion research has produced an eclectic, largely confused and jumbled body of evidence that lacks any comprehensive organising principle or conceptual framework. Whilst the great majority of this empirical research has identified and confirmed existence of the social contagion phenomenon, results have been undermined because the phenomenon itself has been variously and ambiguously defined and operationalised. This has meant that the potential radical implications of social contagion research findings for an orthodox understanding of the human individual as a rational Cartesian agent, have been largely ignored. It is suggested that the emerging evolutionary paradigm of memetics may providea novel conceptual framework for understanding and explaining the empirical phenomenon of social contagion, by understanding it as the observable action of selfish memes replicating through a population. The article concludes by proposing a memetic theory of social contagion, and ends with a call for the synthesis of the two bodies to create a comprehensive body of theoretically informed research.
Quality control (QC) of medical imaging devices is essential to ensure their proper function and to gain accurate and quantitative results. Therefore, several international bodies have published QC guidelines and recommendations for a wide range of imaging modalities to ensure adequate performance of the systems. Hybrid imaging systems such as positron emission tomography/computed tomography (PET/CT) or PET/magnetic resonance imaging (PET/MRI), in particular, present additional challenges caused by differences between the combined modalities. However, despite the increasing use of this hybrid imaging modality in recent years, there are no dedicated QC recommendations for PET/MRI. Therefore, this work aims at collecting information on QC procedures across a European PET/MRI network, presenting quality assurance procedures implemented by PET/MRI vendors and achieving a consensus on PET/MRI QC procedures across imaging centers. Users of PET/MRI systems at partner sites involved in the HYBRID consortium were surveyed about local frequencies of QC procedures for PET/MRI. Although all sites indicated that they perform vendor-specific daily QC procedures, significant variations across the centers were observed for other QC tests and testing frequencies. Likewise, variations in available recommendations and guidelines and the QC procedures implemented by vendors were found. Based on the available information and our clinical expertise within this consortium, we were able to propose a minimum set of PET/MRI QC recommendations including the daily QC, cross-calibration tests, and an image quality (IQ) assessment for PET and coil checks and MR image quality tests for MRI. Together with regular checks of the PET–MRI alignment, proper PET/MRI performance can be ensured. ; This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 764458. The work reflects only the author's view, and the Agency is not responsible for any use ...
