פרסומים

This article presents a transnational study of the classification and evaluation of social media content. We conducted a large-scale survey (N = 4770) in five countries (Germany, Italy, Japan, South Korea, and the United States) with open-ended questions about the types of content people like and dislike. Through iterative and inductive coding, we identified 29 topics, or broad areas of interest, and 213 recurrent genres, or narrower categories that share elements of form and content. We compared the results according to country, gender, age, and education level, identifying patterns of cultural difference and commonality. While we found significant differences in the prominence and preferentiality of content, these distictions were less pronounced for disliked topics around which social media users tended to converge. Finally, we discuss genre imaginaries as normative maps that reflect ideas about morality in general and the purpose of social media in particular.

Fluorescence emitted by light-harvesting pigments responds to the physiological state of phytoplankton. We developed a time resolved system to monitor fluorescence from single cells. It captures multiple spectral channels and fluorescence lifetimes, eliminating ensemble averaging of bulk experiments. Tracking the diurnal cycles of three phytoplankton species, we uncover each species segregation into multiple distinct cell states, a feature previously hidden in bulk measurements. We also tested their response to light-intensity perturbations, and determined each species unique acclimation strategy involving transition between distinct cell subpopulations. This approach will be useful for characterizing natural phytoplankton population responses to environmental conditions, aiming for a better understanding of their acclimation strategies and the effects of global climate changes.