Browsing by Author "Chen, Y."

Now showing 1 - 4 of 4

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The lived experience of child-owned wearables: Comparing children's and parents’ perspectives on activity tracking
(Association for Computing Machinery, Inc, 2021) İlhan, Işıl Oygür; Su, Z.; Epstein, D. A.; Chen, Y.; Industrial Design; OYGÜR İLHAN, Işil
Children are increasingly using wearables with physical activity tracking features. Although research has designed and evaluated novel features for supporting parent-child collaboration with these wearables, less is known about how families naturally adopt and use these technologies in their everyday life. We conducted interviews with 17 families who have naturally adopted child-owned wearables to understand how they use wearables individually and collaboratively. Parents are primarily motivated to use child-owned wearables for children's long-term health and wellbeing, whereas children mostly seek out entertainment and feeling accomplished through reaching goals. Children are often unable to interpret or contextualize the measures that wearables record, while parents do not regularly track these measures and focus on deviations from their children's routines. We discuss opportunities for making naturally-occurring family moments educational to positively contribute to children's conceptual understanding of health, such as developing age-appropriate trackable metrics for shared goal-setting and data refection.
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Raising the responsible child: collaborative work in the use of activity trackers for children
(Association for Computing Machinery, Inc, 2020-10-14) İlhan, Işıl Oygür; Epstein, D. A.; Chen, Y.; Industrial Design; OYGÜR İLHAN, Işil
Commercial activity trackers are increasingly being designed for children as young as 3 years old. However, we have limited understanding of family use practices around these trackers. To provide an overall view of how families naturally use activity trackers towards collaborative management of family health, we systematically identified 9 trackers designed for children available on 4 consumer electronics retailers. Our data is composed of 2,628 user reviews both from the consumer retailers (for the wearables) and mobile application stores (for the associated apps). Our findings indicate children's and parents' collaborative use of these technologies beyond health and wellness. Parents state that their children enjoy practicing independence and rewards while contributing to family health management and daily life requirements. Parents expect these devices to ease their life and to teach their children to become more responsible for their health, daily tasks, and schedule. However, the current designs give limited agency on child's side and require parents' active participation for wearable-app coordination. For these reasons, they do not fully address parents' expectations in decreasing their workload. On the other hand, they have the potential to facilitate family interaction with challenges structured around the data reported through trackers.
Open Access
Social media metrics - A framework and guidelines for managing social media
(Elsevier, 2013-11) Peters, K.; Chen, Y.; Kaplan, A. M.; Ognibeni, B.; Pauwels, Koen Hendrik; Business Administration; PAUWELS, Koen Hendrik
Social media are becoming ubiquitous and need to be managed like all other forms of media that organizations employ to meet their goals. However, social media are fundamentally different from any traditional or other online media because of their social network structure and egalitarian nature. These differences require a distinct measurement approach as a prerequisite for proper analysis and subsequent management. To develop the right social media metrics and subsequently construct appropriate dashboards, we provide a tool kit consisting of three novel components. First, we theoretically derive and propose a holistic framework that covers the major elements of social media, drawing on theories from marketing, psychology, and sociology. We continue to support and detail these elements — namely ‘motives,’ ‘content,’ ‘network structure,’ and ‘social roles & interactions’ — with recent research studies. Second, based on our theoretical framework, the literature review, and practical experience, we suggest nine guidelines that may prove valuable for designing appropriate social media metrics and constructing a sensible social media dashboard. Third, based on the framework and the guidelines we derive managerial implications and suggest an agenda for future research.
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Technical note: Application of an optical hydrophone to ionoacoustic range detection in a tissue-mimicking agar phantom
(Wiley, 2023-12) Sueyasu, S.; Kasamatsu, K.; Takayanagi, T.; Chen, Y.; Kuriyama, Y.; Ishi, Y.; Uesugi, T.; Rohringer, W.; Ünlü, Mehmet Burçin; Kudo, N.; Yokokawa, K.; Takao, S.; Natural and Mathematical Sciences; ÜNLÜ, Mehmet Burçin
Background: Ionoacoustics is a promising approach to reduce the range uncertainty in proton therapy. A miniature-sized optical hydrophone (OH) was used as a measuring device to detect weak ionoacoustic signals with a high signal-to-noise ratio in water. However, further development is necessary to prevent wave distortion because of nearby acoustic impedance discontinuities while detection is conducted on the patient's skin.Purpose: A prototype of the probe head attached to an OH was fabricated and the required dimensions were experimentally investigated using a 100-MeV proton beam from a fixed-field alternating gradient accelerator and k-Wave simulations. The beam range of the proton in a tissue-mimicking phantom was estimated by measuring gamma-waves and spherical ionoacoustic waves with resonant frequency (SPIRE).Methods: Four sizes of probe heads were fabricated from agar blocks for the OH. Using the prototype, the gamma-wave was detected at distal and lateral positions to the Bragg peak on the phantom surface for proton beams delivered at seven positions. For SPIRE, independent measurements were performed at distal on- and off-axis positions. The range positions were estimated by solving the linear equation using the sensitive matrix for the gamma-wave and linear fitting of the correlation curve for SPIRE; they were compared with those measured using a film.Results: The first peak of the gamma-wave was undistorted with the 3 x 3 x 3-cm(3) probe head used at the on-axis and 3-cm off-axis positions. The range positions estimated by the gamma-wave agreed with the film-based range in the depth direction (the maximum deviation was 0.7 mm), although a 0.6-2.1 mm deviation was observed in the lateral direction. For SPIRE, the deviation was <1 mm for the two measurement positions.Conclusions: The attachment of a relatively small-sized probe head allowed the OH to measure the beam range on the phantom surface.