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Microsystems & Nanoengineering 2023年第6期9卷 309-320页

作者： Hui Xia Lin Wang Hao Zhang Zihu Wang Liang Zhu Haolin Cai Yanhua Ma Zhe Yang Dongzhi Zhang College of Control Science and Engineering China University of Petroleum(East China)Qingdao 266580China State Key Laboratory of Chemical Safety SINOPEC Research Institute of Safety Engineering Co.LtdQingdao 266071China

The combination of flexible sensors and deep learning has attracted much attention as an efficient method for the recognition of human postures.In this paper,an in situ polymerized MXene/polypyrrole(PPy)composite is dip-coated on a polydimethylsiloxane(PDMS)sponge to fabricate an MXene/PPy@PDMS(MPP)piezoresistive sensor.The sponge sensor achieves ultrahigh sensitivity(6.8925 kPa^(−1))at 0-15 kPa,a short response/recovery time(100/110 ms),excellent stability(5000 cycles)and wash resistance.The synergistic effect of PPy and MXene improves the performance of the composite materials and facilitates the transfer of electrons,making the MPP sponge at least five times more sensitive than sponges based on each of the individual single materials.The large-area conductive network allows the MPP sensor to maintain excellent electrical performance over a large-scale pressure range.The MPP sensor can detect a variety of human body activity signals,such as radial artery pulse and different joint movements.The detection and analysis of human motion data,which is assisted by convolutional neural network(CNN)deep learning algorithms,enable the recognition and judgment of 16 types of human postures.The MXene/PPy flexible pressure sensor based on a PDMS sponge has broad application prospects in human motion detection,intelligent sensing and wearable devices.

关键词： sponge posture network

posture Maintenance Control of 2-Link Object By Nonprehensile Two-Cooperative-Arm Robot Without Compensating Friction

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IEEE/CAA Journal of Automatica Sinica 2019年第6期6卷 1397-1403页

作者： Changan Jiang Satoshi Ueno Department of Mechanical Engineering Ritsumeikan University1-1-1 Noji-higashiKusatsuShiga 525-8577Japan

In this paper, a method to posture maintenance control of 2-link object by nonprehensile two-cooperative-arm robot without compensating friction is proposed. In details, a mathematical model of the 2-link object is firstly built. Based on the model, stable regions for holding motion of nonprehensile two-cooperative-arm robot are obtained while the 2-link object is kept stable on the robot arms with static friction. Among the obtained stable regions, the robust pairs of orientation angles of the 2-link object are found. Under the robust orientation angles, a feedback control system is designed to control the arms to maintain the 2-link object's posture while it is being held or lifted up. Finally, experimental results are shown to verify the effectiveness of the proposed method.

关键词： Nursing care nonprehensile robot posture maintenance static friction two-cooperative-arm robot

Lumbar interspinous pressure pain threshold values for healthy young men and women and the effect of prolonged fully flexed lumbar sitting posture:An observational study

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World Journal of Orthopedics 2020年第3期11卷 158-166页

作者： Martin Petersson Allan Abbott Department of Physiotherapy Gripen Värmland Country CouncilKarlstad SE-65224Sweden Department of Medical and Health Sciences Division of PhysiotherapyFaculty of Health SciencesLinköping UniversityLinköping SE-58183Sweden

BACKGROUND Low back pain(LBP)is a common condition with large burden worldwide.Exposure to prolonged sitting with a flexed lumbar posture has been suggested in the literature to be a potential risk factor for self-reported LBP.No study has previously investigated whether exposure to prolonged flexed sitting posture provokes discomfort/pain and decreased interspinous pressure pain thresholds for healthy young men and women without back pain,despite this being a suggested risk factor for LBP.AIM To investigate whether sitting in a prolonged flexed lumbar posture provokes discomfort and lowers interspinous pressure pain thresholds in the lumbar spine for healthy young men and women without previous LBP.METHODS This is a an observational before and after study of 26 participants(13 men,13 women)between 20-35 years old.Algometry was used to examine the pain threshold for pressure applied between spinous processes of the lumbar spine L1-L5.Pressure algometer measures were performed in prone before and after participants were instructed to sit in a fully flexed posture for a maximum of 15 min or until discomfort was experienced in the low back(Borg CR10=7/10).Wilcoxon signed-rank test was used for analyze values from the before and after test conditions.Mann-Whitney U test was used to investigate potential gender difference.RESULTS Fully flexed lumbar spine sitting posture up to 15 min provoked temporary discomfort but the proportion of participants experiencing discomfort 7/10 in the low back was 62%.For all pain pressure threshold locations tested,there was a significant difference for the study population with moderate-large decreased(r=-0.56)pressure pain threshold after exposure to prolonged flexed sitting posture(Pposture for up to 15 min produced temporary discomfort in the low back in young healthy adults with no previous history of LBP and significantly reduced lumb

关键词： Low back pain Pain pressure threshold Algometer posture Spine Pain mechanism

Dynamic testing of volleyball players’body posture using a formetric 3D device

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Biosurface and Biotribology 2020年第4期6卷 114-117页

作者： Jianhua Ying Feng Ren Gusztáv Fekete College of Science&Technology Ningbo UniversityNingboPeople’s Republic of China Faculty of Sports Science Ningbo UniversityNingboPeople’s Republic of China Faculty of Informatics Eötvös Loránd UniversityBudapestHungary

Volleyball activities involve several factors such as asymmetrical movements,muscle imbalance,and continual overloading that damage body posture.This study aimed to determine postural changes of volleyball players in spike overhand front set,overhand pass ball,and mat ball motions,and if there is any postural variation difference between short training and long training volleyball players.Methods:Fifteen long training and short training male volleyball players aged 21-23 years were recruited in this study.The upper-thoracic angle,thoracic-lumbar segment angle,lower lumbar-sacral segment,pelvic inclination,and inclination of the acromion were measured using DIERS formetric 3D device in a dynamic way.During the overhand pass motion,long training participants showed a significant larger peak upper-thoracic and peak thoracic-lumbar angles than short training participants.During the mat ball motion,the long training volleyball players demonstrated a significant higher peak upper-thoracic angle,but a smaller peak inclination of the acromion than short trainers.During the spike overhand front set motion,long trainers showed a significant smaller peak upper-thoracic angle than short trainers.Athletes should consider developing an appropriate dynamic trunk stabilization to reduce posture imbalance during volleyball activities.

关键词： thoracic lumbar posture

Technological advancements in the analysis of human motion and posture management through digital devices

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World Journal of Orthopedics 2021年第7期12卷 467-484页

作者： Federico Roggio Silvia Ravalli Grazia Maugeri Antonino Bianco Antonio Palma Michelino Di Rosa Giuseppe Musumeci Department of Psychology Educational Science and Human MovementUniversity of PalermoPalermo 90144Italy Department of Biomedical and Biotechnological Sciences Human Anatomy and Histology SectionSchool of MedicineUniversity of CataniaCatania 95123Italy Department of Biology College of Science and TechnologyTemple UniversityPhiladelphiaPA 19122United States

Technological development of motion and posture analyses is rapidly progressing,especially in rehabilitation settings and sport biomechanics.Consequently,clear discrimination among different measurement systems is required to diversify their use as needed.This review aims to resume the currently used motion and posture analysis systems,clarify and suggest the appropriate approaches suitable for specific cases or contexts.The currently gold standard systems of motion analysis,widely used in clinical settings,present several limitations related to marker placement or long procedure time.Fully automated and markerless systems are overcoming these drawbacks for conducting biomechanical studies,especially outside laboratories.Similarly,new posture analysis techniques are emerging,often driven by the need for fast and non-invasive methods to obtain high-precision results.These new technologies have also become effective for children or adolescents with non-specific back pain and postural insufficiencies.The evolutions of these methods aim to standardize measurements and provide manageable tools in clinical practice for the early diagnosis of musculoskeletal pathologies and to monitor daily improvements of each patient.Herein,these devices and their uses are described,providing researchers,clinicians,orthopedics,physical therapists,and sports coaches an effective guide to use new technologies in their practice as instruments of diagnosis,therapy,and prevention.

关键词： Motion capture Gait analysis Inertial measurement unit Wearable devices Rasterstereography posture

Low-Cost posture Recognition of Moving Hands by Profile-Mold Construction in Cluttered Background and Occlusion

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Journal of Signal and Information Processing 2018年第4期9卷 258-265页

作者： Din-Yuen Chan Guan-Hong Lin Xi-Wen Wu Department of Computer Science and Information Engineering National Chiayi University Taiwan

In this paper, we propose a low-cost posture recognition scheme using a single webcam for the signaling hand with nature sways and possible oc-clusions. It goes for developing the untouchable low-complexity utility based on friendly hand-posture signaling. The scheme integrates the dominant temporal-difference detection, skin color detection and morphological filtering for efficient cooperation in constructing the hand profile molds. Those molds provide representative hand profiles for more stable posture recognition than accurate hand shapes with in effect trivial details. The resultant bounding box of tracking the signaling molds can be treated as a regular-type object-matched ROI to facilitate the stable extraction of robust HOG features. With such commonly applied features on hand, the prototype SVM is adequately capable of obtaining fast and stable hand postures recognition under natural hand movement and non-hand object occlusion. Experimental results demonstrate that our scheme can achieve hand-posture recognition with enough accuracy under background clutters that the targeted hand can be allowed with medium movement and palm-grasped object. Hence, the proposed method can be easily embedded in the mobile phone as application software.

关键词： Bounding Box Hand Profile Mold Motion-Hand posture Recognition

Change in Impedance with Change in posture during Spinal Cord Stimulator Placement

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Pain Studies and Treatment 2014年第2期2卷 70-72页

作者： Samer Abdel-Aziz Ahmed Ghaleb Department of Anesthesiology and Pain Medicine University of Arkansas for Medical Sciences Little Rock USA

In this article we discuss the effect of posture on impedance during the placement of a spinal cord stimulator. Although, according to several studies, there appears not to be a specific and consistent change in impedance with change in posture, we noticed on multiple occasions that if the impedance remains very high during spinal cord stimulator (SCS) lead placement, asking the patient to sit up from the prone position may drop the impedance down. This could be explained by having air around the lead, from using loss of resistance to air technique in finding the epidural space, which moves up when sitting the patient up, or having the lead immersed in epidural fat. Sitting the patient up from the prone position should be tried if the impedance remains very high before aborting the procedure and taking the lead out.

关键词： Impedance Spinal Cord Stimulator Change in posture

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震惊·姿势·免疫：本雅明论“文明综合症”

The Impact of Footwear on posture, Gait and Balance

文艺理论 2024年第4期

作者：黄念然王子铭

本雅明认为现代社会患上了“文明综合症”，并将“文明综合症”视为人们遭遇震惊的后果，这使得作为由震惊体验而引发的身体姿势成为“文明综合症”的突出症候所在。“震惊的姿势”分为显性的身体颤动和隐性的惯常行为，二者都是非自然... 详细信息

本雅明认为现代社会患上了“文明综合症”，并将“文明综合症”视为人们遭遇震惊的后果，这使得作为由震惊体验而引发的身体姿势成为“文明综合症”的突出症候所在。“震惊的姿势”分为显性的身体颤动和隐性的惯常行为，二者都是非自然的姿势。“震惊的姿势”实际上是真正姿势的丧失。面对“文明综合症”，本雅明不仅深入揭示了现代社会中人的身体姿势所呈示出的身心困境，而且以其精准而独到的眼光发掘、展示了现代艺术中对病毒震惊具有抗体的“现代性英雄”图谱，并为现代文明发展之路开出了免疫学药方：以“姿势的震惊”对抗“震惊的姿势”。他对“姿势的震惊”的解放潜力的发掘，以及对权力和资本侵袭下“文明综合症”的形成之因和治愈之路的思考都有重要的理论意义和现实价值。

关键词：本雅明震惊姿势免疫文明综合症　　Benjamin Shock posture Immunity Civilization syndrome

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Health 2022年第2期14卷 209-218页

作者： Saori Karasawa Munetaka Yamamoto Junko Sakurai Shiori Kawasaki Hiroyuki Kobayashi Department of Hospital Administration Juntendo Graduate School of Medicine Tokyo Japan Patient Safety Management Section Juntendo University Hospital Tokyo Japan Faculty of Health and Nursing Juntendo University Chiba Japan

Background: The objective of this study was to investigate the effects of footwear on posture and balance while walking. The types of footwear investigated in this study were open back shoes, commonly worn by hospitalized patients, and closed back shoes. Previous studies have shown that open back shoes, or slippers, increase the risk of falling (among elderly). We hypothesized that our findings would suggest that open back shoes negatively affect gait mechanics in healthy individuals. Methods: Healthy individuals (n = 12) participated in a walking test while wearing closed back shoes and open back shoes. The explanatory variables in this study were the analysis of gait, posture, and balance before and after walking. The objective variable was footwear (closed back shoes vs. open back shoes). A paired t-test was performed to detect significant differences between the two conditions. Results: Among the test items measured, we found a significant difference in minimum wide tilt angle and left-right differences in step length and intensity while walking between the conditions of closed back shoes and open back shoes. These results suggest that open back shoes could negatively impact posture and balance while walking, even in healthy subjects. Conclusion: It is imperative to improve patient awareness of the risk of falling. We believe that the inclusion of our findings in educational pamphlets and in-house notices could help improve patient awareness and more effectively prevent falls among patients.

关键词： Footwear posture Walking Test Health Fall

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《姿posture》

美苑 2015年第S1期 181-页

作者：李玲杜海滨丁剑鲁迅美术学院