Mobile sensing and mapping applications are becoming more prevalent because sensing hardware is becoming more portable and more affordable. However, most of the hardware uses small numbers of fixed sensors that report and share multiple sets of environmental data which raises privacy concerns. Instead, these systems can be decentralized and managed by individuals in their public and private spaces. This paper describes a robust system called MobGeoSens which enables individuals to monitor their local environment (e.g. pollution and temperature) and their private spaces (e.g. activities and health) by using mobile phones in their day to day life.The MobGeoSen is a combination of software components that facilitates the phone's internal sensing devices (e.g. microphone and camera) and external wireless sensors (e.g. data loggers and GPS receivers) for data collection. It also adds a new dimension of spatial localization to the data collection process and provides the user with both textual and spatial cartographic displays. While collecting the data, individuals can interactively add annotations and photos which are automatically added and integrated in the visualization file/log. This makes it easy to visualize the data, photos and annotations on a spatial and temporal visualization tool. In addition, the paper will present ways in which mobile phones can be used as noise sensors using an on-device microphone. Finally, we present our experiences with school children using the above mentioned system to measure their exposure to environmental pollution.

Pervasive sensing has opened up new opportunities for measuring our feelings and understanding our behavior by monitoring our affective states while mobile. This review paper surveys pervasive affect sensing by examining and considering three major elements of affective pervasive systems, namely ''sensing,'' ''analysis,'' and ''application.'' Sensing investigates the different sensing modalities that are used in existing real-time affective applications, analysis explores different approaches to emotion recognition and visualization based on different types of collected data, and application investigates different leading areas of affective applications. For each of the three aspects, the paper includes an extensive survey of the literature and finally outlines some of challenges and future research opportunities of affective sensing in the context of pervasive computing.

With the increasing popularity of mobile video games, game designers and developers are starting to integrate geolocation into video games. Popular location-based games such as Ingress or Pokémon Go have millions of users, yet little is known about how the use of such games influences the nature of a user's interaction with other users and their physical surroundings. To investigate how location-based games are integrated into a player's daily life, how they influence a player's mobility through the city, their perception of places and the role of human territoriality in this context, we have developed a location-based mobile multiplayer game called CityConqueror. In this paper, we present CityConqueror and the results of a study, which has focused on participants playing the game over a period of two weeks. The findings show that locationbased games can be designed to give the player the illusion of playing in the context of the "real" world rather than a virtual or hybrid game reality. Our findings also suggest that location-based games can have a strong influence on a player's mobility and perception of urban space and that human territoriality can be expressed through location-based games. Based on our findings we propose a series of design implications for the design of mobile location-based games.

We explore how physical artefacts can be connected to digital records of where they have been, who they have encountered and what has happened to them, and how this can enhance their meaning and utility. We describe how a travelling technology probe in the form of an augmented acoustic guitar engaged users in a design conversation as it visited homes, studios, gigs, workshops and lessons, and how this revealed the diversity and utility of its digital record. We describe how this record was captured and flexibly mapped to the physical guitar and proxy artefacts. We contribute a conceptual framework for accountable artefacts that articulates how multiple and complex mappings between physical artefacts and their digital records may be created, appropriated, shared and interrogated to deliver accounts of provenance and use as well as methodological reflections on technology probes.

This paper reflects on the dynamics and practices of building a maker community around a new hardware platform. We examine the factors promoting the successful uptake of a maker platform from two perspectives: first, we investigate the technical and user experience considerations that users identify as the most important. Second, we explore the specific activities that help attract a community and encourage sustained participation. We present an inductive approach based on the case study of Bela, an embedded platform for creating interactive audio systems. The technical design and community building processes are detailed, culminating in a successful crowdfunding campaign. To further understand the community dynamics, the paper also presents an intensive three-day workshop with eight digital musical instrument designers. From observations and interviews, we reflect on the relationship between the platform and the community and offer suggestions for HCI researchers and practitioners interested in establishing their own maker communities.

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We are starting to see a paradigm shift within the field of HCI. We are witnessing researchers leaving the safety and security of their controlled, lab-based environments and moving their research out into 'the wild'. Their studies are carrying out in-situ development and extended engagement, sampling experiences and working with communities in their homes and on the streets. This research has initially focused upon understanding the impacts that technological intervention has upon our day-to-day life and is leading us to explore the ways in which in-situ design, development and evaluation can be used to understand and explore these technological interventions. Is it the case that lab-based studies, taking people out of their natural environment and designing in the lab without long term user engagement are no longer appropriate to properly understand the impacts of technology in the real world?

Standardised tools to assess a user’s satisfaction with the experience of using chatbots and conversational agents are currently unavailable. This work describes four studies, including a systematic literature review, with an overall sample of 141 participants in the survey (experts and novices), focus group sessions and testing of chatbots to (i) define attributes to assess the quality of interaction with chatbots and (ii) the designing and piloting a new scale to measure satisfaction after the experience with chatbots. Two instruments were developed: (i) A diagnostic tool in the form of a checklist (BOT-Check). This tool is a development of previous works which can be used reliably to check the quality of a chatbots experience in line with commonplace principles. (ii) A 15-item questionnaire (BOT Usability Scale, BUS-15) with estimated reliability between .76 and .87 distributed in five factors. BUS-15 strongly correlates with UMUX-LITE by enabling designers to consider a broader range of aspects usually not considered in satisfaction tools for non-conversational agents, e.g. conversational efficiency and accessibility, quality of the chatbot’s functionality and so on. Despite the convincing psychometric properties, BUS-15 requires further testing and validation. Designers can use it as a tool to assess products, thus building independent databases for future evaluation of its reliability, validity and sensitivity.