Given the increased interest in animal emotional reactions for assessing welfare, indicators for such reactions are sought. Ear postures and movements have been found to be promising indicators of emotional states in sheep and other animals. The manual recording of ear postures, however, is very time consuming and possibly prone to a degree of inaccuracy due to the subtle and fast nature of ear movements that have to be identified. Therefore, a number of previous studies have analysed the frequency of certain ear postures relative to all ear posture changes rather than measuring the relative duration spent with different ear postures. Here, we present an automated, continuous tracking system that keeps track of small and lightweight marker balls attached to the head and ears of sheep. We measured ear postures and movements when the animals were confronted with three physical stimuli thought to differ in valence (from negative to intermediate to positive). We then compared new ear-posture definitions reflecting the real time spent with certain ear postures during stimulation with previous definitions used for video-based analyses that assessed ear-posture changes in relation to the total number of observed ear postures. In the analysis, we correlated new and previous measures both between and within experimental stimuli using residuals from mixed-effects models. We found that the new and previous definitions of ear postures and movements correlated highly. Given these high correlations and the discussed theoretical and practical advantages of the automated tracking, the new recording system can be recommended highly for assessing reactions in animals that may indicate emotional states.

Although previous scholars have used image data to answer important political science questions, less attention has been paid to video-based measures. In this study, I use motion detection to understand the extent to which members of Congress (MCs) literally cross the aisle, but motion detection can be used to study a wide range of political phenomena, like protests, political speeches, campaign events, or oral arguments. I find not only are Democrats and Republicans less willing to literally cross the aisle, but this behavior is also predictive of future party voting, even when previous party voting is included as a control. However, this is one of the many ways motion detection can be used by social scientists. In this way, the present study is not the end, but the beginning of an important new line of research in which video data is more actively used in social science research.

The demands for Smart City are growing in the context of the rapid urbanization in the world. In the public safety domain, law enforcement agencies are facing new challenges to protect people and properties in the cities, and they are shifting their focus from the traditional crime investigation towards preventive actions that prevent accidents and incidents before it occurs, and inter-agency collaboration that brings the situation under control swiftly when it occurs. In this paper, we discuss new challenges that cities are facing, and describe NEC's solution based on intelligent multimedia surveillance architecture for Safe Cities to tackle these challenges.

Parasites place their hosts under strong selection for adaptive traits that increase parasite resistance. The initial impact of invasive parasites has rarely been observed and can be particularly strong on naïve hosts with limited prior exposure to parasites. Philornis downsi is an introduced fly to the Galapagos Islands whose parasitic larvae cause high mortality in nestlings of Darwin's finches. We used a within-nest camera system and nest monitoring data to examine this new host–parasite interaction in the wild. Many P. downsi flies entered finch nests with incubated eggs or nestlings but only when parent finches were not present. Parasitic P. downsi larvae were observed to emerge from the nest base at night to feed both internally and externally on nestlings. Adult and nestling Darwin’s finches exhibit grooming and avoidance behaviours in the presence of P. downsi parasites. Specifically, in nests with high parasite intensity, nestlings increased self-preening behaviour, ate larvae and stood on top of one another. Female finches probed into their nestling’s nares (first instar larvae reside in the nares) and probed into the nest base (second and third larvae reside in the nest base during the day). These findings shed light on the emergence of anti-parasite behaviour as well as host–parasite relationships after recent parasitism in a naïve host.

Referential practice – the variety of ways in and through which speakers refer to things in social interaction – involves a range of very different methods. When referring to physical objects or processes in face-to-face interaction, people may choose from a variety of resources, including verbal categories, names, pointing, verbal descriptors, depictive gestures, and prop demonstrations. This raises the question: Under what circumstances do speakers choose particular resources over others? To address this question, this study examines referential practice in a particular kind of face-to-face workplace setting, the service counter of a quick print shop. At the service counter, not only do customers use alternative resources in referring to the document services they want, but these resources appear to be ordered relative to one another in terms of a preference for minimization. In referring to document services, customers first try the most minimal form, the official name, but if that fails or is unknown, customers fall back on more expanded forms of reference, such as pointing or depicting.