Article
Multidisciplinary Sciences
Yan Yan, Yonghong Liu, Haining Wang
Summary: This study presents an accurate method for evaluating the fit of earphones, which establishes a connection between interference/gap values and human perception. Seven commercial CAD software tools were explored for analyzing the deviation between earphone and ear, but the current deviation analysis method needs improvement due to various issues in calculation and evaluation. Therefore, a precise deviation analysis algorithm is proposed, which calculates the deviation between earphone and ear and accurately classifies interference and gap. This algorithm proves to be appropriate for earphone fit evaluation and its indexes are related to subjective comfort scores, making it meaningful for the analysis, design, and development of ear-worn products.
SCIENTIFIC REPORTS
(2023)
Article
Neurosciences
Elsa Matthias, Helen Ann Banwell, John Bradley Arnold
Summary: The study found that wearing shoes that are too small restricts foot motion in children aged 8-12, but does not affect jumping performance. Children are able to recognize ill-fitting shoes, emphasizing the importance of comfort in the fitting process.
Article
Engineering, Geological
N. Guo, F. Yang, Z. X. Yang, S. Zhao
Summary: The cardioid-shaped loading path induced by moving traffic was replicated using the discrete element method in a virtual element test of granular media. The study examined the mechanical responses of the material under repeated traffic loading and considered factors such as bedding plane angle, fabric evolution, cyclic vertical stress ratio (CVSR), and initial density.
Article
Engineering, Geological
Gangfeng Yao, Bingyi Li, Xueyu Xiong
Summary: In this paper, a test database of 110 steel reinforced concrete columns was established. An analytical method to predict the yield rotation was developed and the influences of various factors on the ultimate rotation were discussed. Machine learning methods were used to evaluate the accuracy of the proposed model, and some useful recommendations were provided for the seismic evaluation of SRC columns.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Mechanical
Li-Hui Zhao, Qi-Chen Li, Jin-Zhi Feng, Song-Lin Zheng
Summary: This paper addresses the issue of current bearing life evaluation and proposes a new method for predicting wheel-hub-bearing service life under multi-axial wheel loading. By utilizing experimental data and calculation models, the study successfully calculates the life of wheel-hub-bearing under multi-axial random road load, and verifies the accuracy of the results and the rationality of the method through bench testing.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Yun Miao, Xudong Wang
Summary: Coal rock is rarely used as a foundation bearing strata. Field tests were conducted to obtain the vertical bearing characteristics of coal rock. Design parameters for the vertical bearing capacity of shallow and deep foundations were obtained through plate load and bi-directional load tests. Results showed that the deformation modulus of coal rock decreases with increasing pressure.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Marine
Weixin Zhou, Yao Zhao, Hua Yuan, Zhaoxin Ren
Summary: In this paper, an integrated hull-bearing-shaft model is designed and built for a cantilever beam loading test. Displacement sensors are utilized to determine the change in displacement of the hull, bearings, and shaft. The pressure distribution at the bow and stern ends of the bearing is measured using a new type of thin-film pressure sensor. The results show that the rotation angle of the shaft and bearing varied differentially during hull deformation, and the change pattern of the shaft and bearing attitude remains unchanged regardless of the initial state of the shaft. The study also reveals that the bearing condition cannot be determined solely by the bearing reaction force, and the thin-film pressure sensor can be used to determine the status of the shaft-bearing angle.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Mechanics
Jianan Ni, Jihui Yin, Dandan Li, Jiuqing Liu, Zhijie Xie
Summary: A study on the axial static stiffness model of planetary threaded roller bearings (PTRB) was conducted to calculate the contact load distribution. The validity of the proposed mathematical model was verified through finite element simulation, and the effects of external load, pitch, and number of threaded teeth on the contact load distribution were analyzed.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Construction & Building Technology
Qibin Li, Hong Liu, Yuxin Wu, Risto Kosonen, Baizhan Li
Summary: This study compared the effects of fluctuating foot heating and traditional constant heating on thermal responses. The results showed that foot heating significantly improved thermal sensation and overall thermal comfort. In cold environments, constant heating was more effective in increasing skin temperature and thermal sensation. However, heating the foot alone could not effectively improve overall thermal comfort. In cold environments above 13 degrees C, fluctuating heating could better avoid local overheating and ensure a thermal acceptance rate greater than 90%. The optimal fluctuating foot heating mode was recommended for application in cold environments above 13 degrees C.
BUILDING AND ENVIRONMENT
(2023)
Article
Construction & Building Technology
Richard E. Darlington, Tracy C. Becker
Summary: The study investigated the impact of flexible boundary conditions on design assumptions by conducting experiments on rubber bearings installed at column tops, showing that flexible boundary conditions reduce horizontal stiffness, with the rotation-induced decrease dependent on the sum of rotation at the ends. Additionally, the reduction in stiffness due to rotation was found to be dependent on axial load, with larger axial load leading to a higher dependency on rotation.
JOURNAL OF STRUCTURAL ENGINEERING
(2021)
Article
Orthopedics
Evgenia Manousaki, Hanneke Andriesse, Gunnar Hagglund, Axel Strom, Anna-Clara Esbjornsson
Summary: This study evaluated the reliability of the foot drawing method for tracking relapse in clubfoot treatment. The results showed that the method is applicable in clinical practice and research, but caution is needed when interpreting changes in foot rotation in feet with higher degrees of rotation.
BMC MUSCULOSKELETAL DISORDERS
(2022)
Article
Materials Science, Multidisciplinary
Xiaojiao You, Jian Yang, Chengyi Dan, Han Chen, Yuchi Cui, Haowei Wang, Mingliang Wang, Zhe Chen
Summary: The mechanism of deformation banding in cold rolling Al-Mg alloy was investigated with a focus on local lattice rotation and related dislocation slip. It was found that the formation of deformation bands is orientation dependent, with a strong presence in grains close to certain crystallographic directions. The activation of secondary slips and their associated lattice rotation contribute to the formation of deformation bands.
MATERIALS CHARACTERIZATION
(2022)
Article
Sport Sciences
Mako Fukano, Kento Nakagawa, Takayuki Inami, Ayako Higashihara, Satoshi Iizuka, Takaya Narita, Toshihiro Maemichi, Akane Yoshimura, Shota Yamaguchi, Shigeo Iso
Summary: Long-distance running can cause a decrease in foot arch height and increase in asymmetry, as observed in collegiate runners who completed a full marathon. Factors such as pre-race foot arch asymmetry were found to predict post-race asymmetry and displacement of navicular height. Overall, full marathon running induced increased asymmetry and lowered the medial longitudinal arch in runners.
JOURNAL OF SPORTS SCIENCES
(2021)
Article
Multidisciplinary Sciences
Masahiro Kuramochi, Hiroki Omata, Masaki Ishihara, Sander O. Hanslin, Masaichiro Mizumaki, Naomi Kawamura, Hitoshi Osawa, Motohiro Suzuki, Kazuhiro Mio, Hiroshi Sekiguchi, Yuji C. Sasaki
Summary: A new in situ diffracted X-ray blinking method was developed to monitor high-resolution diffraction patterns of single-crystal grains with a 50 ms time resolution. The analysis of diffraction spots revealed differences in the motions of single grains between silver halides. The rotational diffusion coefficients for silver halides were accurately estimated, providing a useful tool for evaluating physical properties in various fields such as physics, chemistry, and materials science.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Multidisciplinary
T. P. Romanova, A. P. Yankovskii
Summary: This study investigates the upper limit of load-bearing capacity for ellipsoidal fiber-reinforced shells of rotation. The structures are fixed along the lower contour and have a rigid polar plate. The material is rigid-plastic with asymmetry in tension and compression, with an orthotropic matrix. The study uses a two-layer shell model and refined relations for the two-dimensional stress state in the components. The extreme problem is formulated and numerically solved for spherical and two different ellipsoidal shells, examining the influence of reinforcement parameters on the limit load.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Computer Science, Interdisciplinary Applications
Woojoo Kim, Jaeho Sung, Shuping Xiong
Summary: This study proposed a WIP technique for omnidirectional VR locomotion based on a single RGB camera, utilizing an open-source 2D human pose estimation system called OpenPose. Experimental results showed that the proposed OpenPose-based technique performed well when the user faced the front of the camera, and had lower variation of virtual walking speed and higher subjective evaluation ratings at non-forward directions compared to other techniques.
Article
Engineering, Electrical & Electronic
Xiang Yu, Xiangdong Chen, Xinglin Yu, Xinpeng Chen, Xing Ding, Xuan Zhao, Kung Tang
Summary: In this study, a Nafion/MoS2 hybrid thin film was developed for humidity detection, and it was found that the hybrid film exhibited a higher shift frequency compared to other sensors. This was attributed to the enhanced water channel formation ability of the composite film due to the dispersion of MoS2 nanosheets.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Engineering, Industrial
Qi Zhang, Qiurong Xie, Hong Liu, Bo Sheng, Shuping Xiong, Yanxin Zhang
Summary: The objective of this pilot study was to identify risk factors in physical therapy by quantitatively analyzing ergonomic postures and biomechanical movements. The study found that the low back compression forces of different patient handling tasks exceeded the safety threshold, indicating high risk.
INTERNATIONAL JOURNAL OF INDUSTRIAL ERGONOMICS
(2022)
Article
Computer Science, Interdisciplinary Applications
Woojoo Kim, Shuping Xiong
Summary: This study proposes a new technique called ViewfinderVR for improved selection of distant objects in VR, which outperforms traditional raycasting in terms of task performance and perceived workload. It enables faster and more accurate target selection, with touch interaction being superior to ray-based interaction.
Article
Public, Environmental & Occupational Health
Taekyoung Kim, Shuping Xiong
Summary: This study developed a Kinect-based tailored interactive fall intervention system that effectively improved physical and cognitive abilities in older people. The system showed excellent usability for both computer-experienced and computer-inexperienced older individuals. This innovative system will help older people and health professionals proactively manage the risk of falls.
FRONTIERS IN PUBLIC HEALTH
(2022)
Article
Engineering, Industrial
Woojoo Kim, Shuping Xiong
Summary: Despite the lack of haptic feedback, two-finger typing is still commonly used in virtual reality. To compensate for this limitation, researchers investigated the effects of pseudo-haptics and thumb-to-finger pinch self-haptics on virtual keyboards. The findings showed that the pseudo-haptic and pinch keyboards performed comparably to the normal keyboard in typing performance and workload, but were more beneficial in terms of user experience and preference.
APPLIED ERGONOMICS
(2022)
Article
Engineering, Multidisciplinary
Xiaoqun Yu, Bummo Koo, Jaehyuk Jang, Youngho Kim, Shuping Xiong
Summary: This study compared the accuracy and practicality of threshold-based, traditional machine learning, and deep learning algorithms for pre-impact fall detection. It found that ConvLSTM outperformed other algorithms in detecting young subjects and had low latency on embedded devices, showing potential for application in older subjects.
Article
Engineering, Industrial
Xiaoqun Yu, Seonghyeok Park, Shuping Xiong
Summary: This study aims to propose a convenient test protocol to assess trunk range of motion (TROM) using a single wearable sensor and investigate its relationship with fall risk in older people. The optimal sensor position was found to be T12, which had the smallest error compared to the golden reference. The non-faller group had significantly higher TROMs than the faller group, suggesting that TROM can be a promising indicator of fall risk in older people.
APPLIED ERGONOMICS
(2023)
Article
Engineering, Industrial
Taekyoung Kim, Xiaoqun Yu, Shuping Xiong
Summary: Falls among older people are a major health concern. This study developed a low-cost, markerless Kinect-based fall risk assessment system for older people. The system successfully screened out 'at risk' individuals and identified potential risk factors for effective fall intervention.
Article
Chemistry, Analytical
Myeonghoon Ko, Tiejun Ma, Shuping Xiong
Summary: Carbon fiber insole (CFI), which is lightweight and stiff, has been shown to improve sports performance in terms of power generation and agility. However, it also activates more lower extremity muscles and is perceived as stiffer and less comfortable compared to the benchmark insole.
Article
Computer Science, Information Systems
Xiaoqun Yu, Tiejun Ma, Jaehyuk Jang, Shuping Xiong
Summary: This paper proposes a novel application of data augmentation to address rotation errors of wearable sensors for robust pre-impact fall detection. The results show that the augmented models can significantly improve the accuracy of the validation dataset without increasing the errors of the original dataset. The normal strategy of data augmentation has advantages over the uniform strategy in the typical error range for practical applications.
IEEE JOURNAL OF BIOMEDICAL AND HEALTH INFORMATICS
(2023)
Review
Engineering, Industrial
Tiejun Ma, Yanxin Zhang, Sang D. Choi, Shuping Xiong
Summary: The development of industrial exoskeletons aims to reduce physical demands and ergonomic issues in the workplace. Modelling is considered a powerful tool for the design and evaluation of these exoskeletons, providing a safe and economical alternative to empirical methods. This systematic review demonstrates that existing modelling methods can evaluate the biomechanical and physiological effects of industrial exoskeletons, but fail to cover certain evaluation metrics supported by experimental assessments.
APPLIED ERGONOMICS
(2023)
Article
Engineering, Biomedical
Xiaoqun Yu, Seonghyeok Park, Doil Kim, Eungjin Kim, Jaewon Kim, Woosub Kim, Yechan An, Shuping Xiong
Summary: Falls are a major public health problem in an aging society. This study proposes a small convolutional neural network (TinyCNN) for automatic fall detection and achieves high accuracy and practicality. The TinyCNN has been evaluated on large-scale public fall datasets and shows promising results, leading to the development of a practical wearable prototype system for real-life fall detection applications.
BIOMEDICAL SIGNAL PROCESSING AND CONTROL
(2023)
Article
Chemistry, Analytical
Bummo Koo, Xiaoqun Yu, Seunghee Lee, Sumin Yang, Dongkwon Kim, Shuping Xiong, Youngho Kim
Summary: In this study, the researchers aimed to lightweight the state-of-the-art ConvLSTM model for preimpact fall detection in microcomputer units. By leveraging features from image-classification models VGGNet and ResNet, they proposed a TinyFallNet model based on ResNet, which exhibited higher accuracy and lower memory requirement compared to ConvLSTM. They also validated the model by analyzing fall data and activities of daily living data.
Review
Engineering, Industrial
Mariam Bader, Jiju Antony, Raja Jayaraman, Vikas Swarnakar, Ravindra S. Goonetilleke, Maher Maalouf, Jose Arturo Garza-Reyes, Kevin Linderman
Summary: This study examines the critical failure factors (CFFs) of various process improvement projects and proposes a mitigation framework. Through a literature review, the authors identify factors such as resistance to cultural change, lack of top management support, inadequate training and education, poor communication, and lack of resources as primary causes of project failures. The study provides practical implications for researchers and project managers and introduces a novel approach based on change management theory to minimize the risk of failure associated with process improvement.
INTERNATIONAL JOURNAL OF LEAN SIX SIGMA
(2023)
