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<div><span style="font-family: 'Times New Roman', serif; orphans: 2; widows: 2; line-height: 1.6;">**********************************************************************</span></div><div><span style="font-family: 'Times New Roman', serif; orphans: 2; widows: 2; line-height: 1.6;">Personal and Ubiquitous Computing Theme Issue on </span></div><div><b style="font-family: 宋体, arial, Verdana, sans-serif; orphans: 2; widows: 2; line-height: 1.6;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Device-Free Sensing for Human Behavior Recognition (Part II)</span></b></div><div><span style="font-family: 'Times New Roman', serif; orphans: 2; widows: 2; line-height: 1.6; text-decoration: none; color: rgb(56, 148, 193);"><a href="https://www.facebook.com/personalubicomp" target="_blank" style="font-family: 宋体, arial, Verdana, sans-serif; orphans: 2; widows: 2; line-height: 1.6; text-decoration: none; color: rgb(56, 148, 193);">https://www.facebook.com/personalubicomp</a></span></div><div><b style="font-family: 宋体, arial, Verdana, sans-serif; orphans: 2; widows: 2; line-height: 1.6;"><span lang="EN-US" style="font-family: "Times New Roman", serif; color: red;">Manuscript Submission: Oct. 31, 2019</span></b></div><div><span style="font-family: 'Times New Roman', serif; orphans: 2; widows: 2; line-height: 1.6;">**********************************************************************</span></div></div><div class="J-cc" style="color:black;margin-top:45px;margin-bottom:10px;font-size:14px;" id="ntes-pcmail-forward-content"><div style="font-family:微软雅黑,Verdana,"Microsoft Yahei",SimSun,sans-serif;font-size:14px; line-height:1.6;"><div><div><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;"> INTRODUCTION<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Human behavior recognition and understanding is the core technology that enables a wide variety of human-machine systems and applications, e.g., health care, smart homes, and fitness tracking. Traditional approaches mainly use cameras and wearable sensors. However, all these approaches have certain disadvantages. For example, camera-based approaches have the limitations of requiring line of sight with enough lighting and breaching human privacy potentially. Wearable sensor-based approaches are inconvenient sometimes as users usually need to wear certain sensor-rich devices. Recently, device-free human behavior recognition approaches (e.g., Wi-Fi based and acoustic based) are attracting increasing attentions. For instance, compared with traditional approaches, Wi-Fi based approaches have a set of advantages, e.g., they do not require lighting, provide better coverage as they can operate through walls, preserve user privacy, and do not require users to carry any devices as they rely on the Wi-Fi signals reflected by humans. As a result, the recognition of quite a number of behaviors that are difficult based on traditional approaches have now become possible, e.g., fine-grained movements (e.g., gesture and lip language), keystrokes, drawings, gait patterns, vital signals (e.g., breathing rate and heart rate), etc. However, device-free behavior recognition still faces a number of challenges: How to build device-free behavior recognition models and algorithms that are robust for different humans? How to overcome the impact of noise and ensure the performance of device-free systems? How to simultaneously recognize the behavior of multiple users? How the device-free system can adapt and evolve according to the environment change?<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">This special issue of ACM/Springer Journal of Personal and Ubiquitous Computing provides the opportunity for researchers and product developers to review and discuss the state-of-the-art and trends of device-free behavior recognition techniques and systems.<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">In the light of the above, the main purpose of this special issue is threefold:<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">(1) To promote unprecedented approaches and techniques in signal processing, feature extraction, data mining and model construction for device-free human behavior recognition;<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">(2) To identify open issues which remain a challenge towards the convergence of computation theories and technologies for device-free behavior recognition;<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">(3) To exploit novel application areas and demonstrate the benefits of device-free behavior recognition in contrast with more traditional sensing approaches.<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;"> <o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Topics may include (but are not limited to):<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">- Device-free Human Behavior Recognition Algorithms<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">- Signal Processing Techniques for Device-free Human Behavior Recognition<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">- Data Mining Techniques for Device-free Human Behavior Recognition<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">- New Device-free Sensing Modes for Human Behavior Recognition<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">- Novel Human Behavior Recognition Applications/Systems based on Device-free Sensing<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">- Evaluation Metrics and Empirical Studies of Device-free Human Behavior Recognition<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">- Deployment Experiences for Device-free Human Behavior Recognition<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;"> </span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Submissions<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Papers must be tailored to the problems of device-free behavior recognition and explicitly consider the above issues. The Guest Editors reserve the right to reject papers they deem to be out of scope of this SI. Only originally unpublished contributions and invited articles will be considered for this SI.<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;"> </span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Guest Editors<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Bin Guo, </span><span lang="EN-US"><a href="mailto:guob@nwpu.edu.cn" target="_blank" style="text-decoration: none; color: rgb(56, 148, 193);"><span style="font-family: 'Times New Roman', serif;">guob@nwpu.edu.cn</span></a></span><span lang="EN-US" style="font-family: 'Times New Roman', serif;">, Northwestern Polytechnical University (China)<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Yanyong Zhang, </span><span lang="EN-US"><a href="mailto:yyzhang@winlab.rutgers.edu" target="_blank" style="text-decoration: none; color: rgb(56, 148, 193);"><span style="font-family: 'Times New Roman', serif;">yyzhang@winlab.rutgers.edu</span></a></span><span lang="EN-US" style="font-family: 'Times New Roman', serif;">, Rutgers University (USA)<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Daqing Zhang, </span><span lang="EN-US"><a href="mailto:dqzhang@sei.pku.edu.cn" target="_blank" style="text-decoration: none; color: rgb(56, 148, 193);"><span style="font-family: 'Times New Roman', serif;">dqzhang@sei.pku.edu.cn</span></a></span><span lang="EN-US" style="font-family: 'Times New Roman', serif;">, Peking University (China) / Institute Mines-Telecom (France)<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Zhu Wang, </span><span lang="EN-US"><a href="mailto:wangzhu@nwpu.edu.cn" target="_blank" style="text-decoration: none; color: rgb(56, 148, 193);"><span style="font-family: 'Times New Roman', serif;">wangzhu@nwpu.edu.cn</span></a></span><span lang="EN-US" style="font-family: 'Times New Roman', serif;">, Northwestern Polytechnical University (China)<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;"> </span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Important Dates<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Manuscript Submission: Oct. 31, 2019<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Decision Notification: Feb. 28, 2020<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Final Manuscript Due Date: Mar. 31, 2020<o:p></o:p></span></p><p class="MsoNormal" style="font-family: 宋体, arial, Verdana, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Publication Date (tentative): Autumn 2020</span></p></div><div style="font-family:'微软雅黑'">
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