October 2024
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Publications (115)
October 2024
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10 Reads
August 2024
Valgus angles during knee movements are a measure of interest both for rehabilitation and injury prevention applications. Soft, garment-like movement-sensing devices can improve patient experience with enhanced donning and comfort while supporting rehabilitation regimens and collecting valuable recovery metrics. However, textile-based sensing is generally less accurate than traditional methods for measuring joint angles. This study (n=3 participants) tested medial knee sensor responses during optical motion capture with prototype variants with and without circumferential anchors. Test participants performed non-valgus and valgus-induced squats. Correlation coefficients and regression were used to understand the relationships between knee valgus and sensor responses. Findings included mixed effects from anchoring, affected by participant and type of squat. Crosstalk from large flexion angles could be a primary contributor to the variability in medial sensor response. The ability to effectively sense and disambiguate these out-of-plane rotational effects remains a primary challenge for sensing complex movements with garment-integrated textile sensors.
January 2024
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28 Reads
October 2023
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8 Reads
October 2023
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15 Reads
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1 Citation
October 2023
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22 Reads
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2 Citations
October 2023
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13 Reads
International Journal of Fashion Design Technology and Education
June 2023
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93 Reads
Compression devices are widely used in fields such as astronautics, cosmetics, and medical therapy for treatment of various diseases such as Postural orthostatic tachycardia syndrome (POTS) and Orthostatic Hypotension (OH). Unlike traditional compression devices that apply static pressure on the body, there have been some efforts to integrate smart materials such as shape memory alloys (SMAs) to make compression garments active and controllable. SMA-based compression systems can be made in tourniquet (band) and knit (larger area) forms. SMA Knits are typically activated through direct heating approaches that may not be accessible in real-life applications. Unlike other forms of SMA actuators, due to the complexity of SMA wire interconnections in the knit, Joule heating has not been investigated yet. Hence, this paper presents an experimental protocol to electrically activate the SMA-knits through Joule heating. The designed protocol, include measurement of generated force, electrical properties, and temperature in a displacement control condition. The results of this study indicate that connecting the power leads to the middle of a knitted SMA sample along the course direction, can contribute to a better wide-reaching electrical pathway, and subsequently achieves better force generation through Joule heating.
December 2022
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59 Reads
Citations (80)
... Developing electronic textile (E-textile) involves repeated disassembly of integrated electronic devices to find the optimal device position in the field of activity recognition and healthcare [6,9,19]. For example, monitoring lower-limb rehabilitation requires the precise placement of sensors at different patients' injured joints and muscles [33]. E-textile prototyping tools provide means to quickly test and evaluate the proof-of-concept e-textiles [8,24,29]. ...
- Citing Conference Paper
October 2023
... The smart material actuation system (e.g., conductive polymers), often an integral actuator and mechanism, is relatively specialized in applications [140][141][142]. Though they are lightweight and have a quick response, they generally provide a lower output power and a more limited range of motion than other types of actuation systems. ...
- Citing Article
- Full-text available
November 2022
IEEE Reviews in Biomedical Engineering
... Specifically, interconnection and hardware-textile integration remain a major challenge for e-textile production. Research has examined various interconnection designs to improve e-textile durability [31,32,59,63] and stretchability [60], as well as surface-mount assembly on textiles [6,44,45]. ...
- Citing Article
- Full-text available
January 2022
Flexible and Printed Electronics
... However, DEAs usually require high voltage for their actuation [120]. These materials are generally activated by using high DC and AC voltages (higher than 1 kV), which could pose serious damages to the body when discharging, such as deep skin, tissue burns, and cardiovascular injuries such as ventricular [70], [71] • Hysteresis [48], [73]- [77] • Nonlinearity [78]- [85] • Sensitivity to mechanical deformation and curvature [42], [63], [86]- [89] • Sensor multiplexing challenges [63], [90] • Manufacturing challenges [48], [93] • Size, weight, and stiffness [91], [94] On-body Soft Actuation Challenges • Dynamics modelling and control challenges [27], [95]- [101] • Material properties Pneumaticbased actuator • Bulky and requires heavy rigid equipment [102] • Slow actuation frequency [63], [64] • Infeasible actuator multiplexing • Leak risk (causing discomfort and safety risk) SMA • High activation temperature • Slow actuation (phase transformation) [122] • Electrical insulation [103], [104] • Actuation creep over time [106] • Sensitive to ambient conditions [27] • Hysteresis phase transformation (force generation curve) • Lack of effective wearable cooling system SMP • Relatively low force amounts • Rigidity in lower temperature (causing discomfort and safety risks) [31] • One-way actuation [31] EAP • High voltage electrical discharge [35], [68] • Relatively short lifetime and less durable [35], [68] • Relatively complicated and costly manufacturing [35], [68] Body Condition Challenges • Inter-and intra-personal anthropometric variabilities [107]- [111] • Migration/slippage of soft components on soft tissue [63], [112] • Biocompatibility, comfort, and safety concerns [113], [115]- [117], [120] • Lack of standard method for in-situ and in-vivo testings [63], [123] fibrillation [121]. ...
- Citing Conference Paper
- Full-text available
September 2021
... Such design approach allows for easy actuator repair and/or replacement without the need to take off the entire exosuit; instead, only the pocket needs to be removed and fixed. We note that during preliminary experimentation, we also explored the use of snap buttons similar to Golgouneh et al. (2021) as an alternative way of attachment which, compared to our selected method, demonstrated two key limitations. First, the pocket was attached to the substrate based on a few distinctive points, which led to undesired actuator relative motion and/or deformation during inflation/deflation. ...
- Citing Conference Paper
September 2021
... For example, Russel and Barrett's valence-arousal model (Russell and Barrett, 1999) describes each emotional state in terms of its valence (positive or negative) and arousal (arousing or calm), whereas Ekman's work (1992b;1992a) identifies basic emotions that are commonly experienced and universally understood across cultures. While previous affective designs have been assessed based on ei-ther discrete (Lan et al., 2022;Chen et al., 2021a;Foo et al., 2021), or dimensional (Aoki et al., 2022;An et al., 2022) views of emotion, in this research, we evaluated our designed affective animations by assessing both affect category recognizability (discrete) and valencearousal properties (dimensional) to have a comprehensive understanding of the affective affordance of the animated chat balloons. ...
- Citing Article
March 2021
Proceedings of the ACM on Interactive Mobile Wearable and Ubiquitous Technologies
... [3] This paper proposes a deep learning-based approach for fashion recommendation and design, utilizing convolutional neural networks and generative adversarial networks to generate personalized fashion designs. "An Ensemble-Based Hybrid Fashion Recommendation System" by Zhang et al. (2021) [4] This study proposes an ensemble-based hybrid fashion recommendation system, combining content-based and collaborative filtering approaches to improve the accuracy of recommendations. [5] This paper presents a personalized fashion recommendation system based on social media data, utilizing deep learning techniques to analyze user preferences and generate personalized recommendations. ...
- Citing Chapter
March 2021
Lecture Notes in Electrical Engineering
... But beyond that, fashion recommendation may also need to consider fashionability or compatibility in different situations. The purpose of recommendation in fashion is not only to help consumer over-choice [201], but also to provide styling or dressing advice for the users [6,21,40,41]. For example, for the complementary recommendation task, the main research problem is to model the compatibility between fashion items. ...
- Citing Chapter
March 2021
Lecture Notes in Electrical Engineering
... Indeed, e-textile fabrication combines apparel and hardware manufacturing processes, integrating soft goods (slim soft circuitry) and hard goods (printed circuit boards and electronics). While both industries have wellestablished standards and protocols, scaling them remains a challenge [18,29,43]. ...
- Citing Conference Paper
- Full-text available
December 2020
... However, e-textile components risk introducing more error into the electronic system, particularly when worn due to the confounding variables that are introduced when worn close to the human body. Many e-textile sensing components have been wellcharacterized for wearable applications [1]- [4], but the effects of introducing textile-type interconnects in addition to soft sensor compontents are not as well understood. Here, we investigate the effects of three textile-like interconnection materials on two e-textile force sensors, under an array of simulated body-worn conditions, in order to assess the effects of each wearability variable individually. ...
- Citing Conference Paper
- Full-text available
December 2020