Human traces scattered across urban landscapes can signify our everyday lives and societal vibrancy in subtle and poetic forms. In this paper, we explore how designed technology can engage biodata as evocative traces. To this end, we present the design, implementation, and evaluation of HeartSway, an interactive hammock that captures a user's heart rate and micro-movements as traces and replays them as an embodied experience for the next visitor. Through a qualitative field study (N=10), we find that HeartSway evokes feelings of connection, curiosity about prior users, and appreciation for shared human vitality. Our work contributes to understanding anonymous archival biodata as a design material for experiential urban traces. We offer design considerations for intimate asynchronous encounters between strangers in public spaces and for reimagining public amenities.

翻译：散布于城市景观中的人类痕迹能以微妙而诗意的方式展现我们的日常生活与社会活力。本文探讨了如何通过技术设计将生物数据转化为具有感染力的痕迹。为此，我们展示了互动吊床HeartSway的设计、实现与评估——该装置能捕捉用户的心率与微幅运动作为痕迹，并以具身化体验的方式回放给下一位访客。通过定性田野研究（N=10），我们发现HeartSway引发了情感联结、对先前用户的好奇心以及对共享人类生命力的赞赏。本研究为将匿名归档生物数据作为体验式城市痕迹的设计材料做出了贡献，并提出了在公共空间中搭建陌生人之间私密异步相遇的设计考量，以及重新构想公共设施的可能路径。