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Liu, Q. (author), Ghodrat, S. (author), Jansen, K.M.B. (author)Conventional hinge actuators often face limitations including excessive weight, large size and unpleasant noise. Shape memory alloys (SMAs) offer a solution to address these issues due to their favorable characteristics, such as lightweight, high actuation force and small form factor. However, most existing SMA-based hinge actuators rely on...journal article 2024
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Liu, Q. (author), Ghodrat, Dr. Sepideh (author), Jansen, K.M.B. (author)We developed a shape-changing constructive kit, named Mimosa1. A key component of the toolkit is the modular hinges, each of which is equipped with two antagonistic shape memory alloy (SMA) wires. One wire deforms the hinge to approach its predetermined angle at high temperature, and another wire drives the hinge back when it cools down....conference paper 2024
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El Ali, Abdallah (author), Stepanova, Ekaterina R. (author), Palande, Shalvi (author), Mader, Angelika (author), Cesar, Pablo (author), Jansen, K.M.B. (author)Sharing breathing signals has the capacity to provide insights into hidden experiences and enhance interpersonal communication. However, it remains unclear how the modality of breath signals (visual, haptic) is socially interpreted during collaborative tasks. In this mixed-methods study, we design and evaluate BreatheWithMe, a prototype for...conference paper 2023
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Bozali, B. (author), Ghodrat, S. (author), Jansen, K.M.B. (author)As an emerging technology, smart textiles have attracted attention for rehabilitation purposes to monitor heart rate, blood pressure, breathing rate, body posture and limb movements. Compared with traditional sensors, knitted sensors constructed from conductive yarns are breathable, stretchable and washable, and therefore, provide more...journal article 2023
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Liu, Q. (author), Ghodrat, S. (author), Huisman, G. (author), Jansen, K.M.B. (author)Devices delivering sophisticated and natural haptic feedback often encompass numerous mechanical elements, leading to increased sizes and wearability challenges. Shape memory alloys (SMAs) are lightweight, compact, and have high power-to-weight ratios, and thus can easily be embedded without affecting the overall device shapes. Here, a review...review 2023
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Alkemade, Puck (author), Eijsvogels, Thijs M.H. (author), Janssen, Thomas W.J. (author), Jansen, K.M.B. (author), Kingma, Boris R.M. (author), Daanen, Hein A.M. (author)PURPOSE: For wheelchair users with a spinal cord injury, the lower body may be a more convenient cooling site than the upper body. However, it remains unknown if leg cooling reduces thermal strain in these individuals. We compared the impact of upper-body versus lower-body cooling on physiological and perceptual outcomes during submaximal arm...journal article 2023
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Bozali, B. (author), Ghodrat, Dr. Sepideh (author), Jansen, K.M.B. (author)As an emerging technology, smart textiles have attracted attention for rehabilitation purposes or to monitor heart rate, blood pressure, breathing rate, body posture, as well as limb movements. Traditional rigid sensors do not always provide the desired level of comfort, flexibility, and adaptability. To improve this, recent research focuses...journal article 2023
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Pereira Espíndola, S. (author), Norder, B. (author), Jansen, K.M.B. (author), Zlopasa, J. (author), Picken, S.J. (author)Tailoring the order in hierarchical structures is a key goal of bioinspired nanocomposite design. Recently, nacre-like materials have been developed by solvent evaporation methods that are scalable and attain advanced functionalities. However, understanding the alignment mechanisms of 2D fillers, nanosheets, or platelets remains challenging....journal article 2023
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Jansen, K.M.B. (author), Teunissen, L.P.J. (author)Cooling vests containing phase change materials (PCMs) are used to reduce heat stress in hot environments and maintain the body core temperature within a safe range. The performance of such cooling vests depends in a complicated way on the PCM material and mass, the insulation value of the clothing layers and heat loss to the environment....journal article 2022
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Buso, A. (author), McQuillan, H.L. (author), Jansen, K.M.B. (author), Karana, E. (author)Designers of textile-based interactive systems tend to treat woven fabrics as static materials and lack deeper understandings of how the textile can be designed for responsive behaviours in artefacts. As a result, in most studies across design and HCI, textiles are employed as substrates for computational, biological, or smart materials. This...conference paper 2022
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Liu, Q. (author), Ghodrat, S. (author), Jansen, K.M.B. (author)Shape memory alloy (SMA) wires are excellent candidates for wearable actuators since they are thin, low weight and have a high actuation force. The main drawbacks are that the wire should be kept straight and needs to be relatively long to enable a large enough actuation stroke. Embedding the SMA wire in a flexible tube largely enhances its...journal article 2022
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Li, Xueliang Sean (author), Rozendaal, M.C. (author), Vermetten, Eric (author), Jansen, K.M.B. (author), Jonker, C.M. (author)Smart wearables are increasingly used to help people deal with stress. Still, a less explored area of research in this field concerns the partnerships that smart wearables can take on when engaging people in stress-coping activities. To facilitate further understanding of the human-wearable partnerships, we designed Grippy, a smart wearable...journal article 2022
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Cuperman, Rafael (author), Jansen, K.M.B. (author), Ciszewski, M.G. (author)Action statistics in sports, such as the number of sprints and jumps, along with the details of the corresponding locomotor actions, are of high interest to coaches and players, as well as medical staff. Current video-based systems have the disadvantage that they are costly and not easily transportable to new locations. In this study, we...journal article 2022
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Roelofsen, C.P.G. (author), Jansen, K.M.B. (author)Purpose: The purpose of this study is to analyze the question “In what order of magnitude does the comfort and performance improvement lie with the use of a cooling vest for construction workers?”. Design/methodology/approach: The use of personal cooling systems, in the form of cooling vests, is not only intended to reduce the heat load, in...journal article 2022
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Roelofsen, C.P.G. (author), Jansen, K.M.B. (author), Vink, P. (author)This paper has the objective to initiate a discussion on potential improvements or extension of the validity of the original equation of the Predicted Percentage of Dissatisfied (PPD), according to (NEN-)EN-ISO 7730. This paper is to be regarded as a supplement to a paper on a re-derivation of the PMV equation in the Fanger model (Roelofsen,...journal article 2022
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Bozali, B. (author), Ghodrat, Dr. Sepideh (author), Plaude, L. (author), van Dam, J.J.F. (author), Jansen, K.M.B. (author)In recent years, knitted strain sensors have been developed that aim to achieve reliable sensing and high wearability, but they are associated with difficulties due to high hysteresis and low gauge factor (GF) values. This study investigated the electromechanical performance of the weft-knitted strain sensors with a systematic approach to...journal article 2022
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Roelofsen, C.P.G. (author), Jansen, K.M.B. (author)In this study, using construction activities as an example, a proposal is made for the time-dependent prediction of the thermal sensation and the performance loss using a cooling vest, under transient conditions. The approach presented here can, mutatis mutandis, be used for any work activity and the use of a cooling vest, whether or not in a...journal article 2022
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Steijlen, A.S.M. (author), Jansen, K.M.B. (author), Bastemeijer, J. (author), French, P.J. (author), Bossche, A. (author)Sweat sensors allow for new unobtrusive ways to continuously monitor an athlete's performance and health status. Significant advances have been made in the optimization of sensitivity, selectivity, and durability of electrochemical sweat sensors. However, comparing the in situ performance of these sensors in detail remains challenging because...journal article 2022
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Teunissen, L.P.J. (author), Jansen, K.M.B. (author), Janssen, E.S. (author), Kingma, Boris R.M. (author), De Korte, Johannus Q. (author), Eijsvogels, Thijs M.H. (author)Objectives To evaluate how separate and combined climatic parameters affect peak core temperature during exercise in the heat using computer simulations fed with individual data. Methods The impact of eight environmental conditions on rectal temperature (T re) was determined for exercise under heat stress using the Fiala-thermal-Physiology...journal article 2022
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van Manen, T. (author), Janbaz, S. (author), Jansen, K.M.B. (author), Zadpoor, A.A. (author)Shape-shifting materials are a powerful tool for the fabrication of reconfigurable materials. Upon activation, not only a change in their shape but also a large shift in their material properties can be realized. As compared with the 4D printing of 2D-to-3D shape-shifting materials, the 4D printing of reconfigurable (i.e., 3D-to-3D shape...journal article 2021