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An AI-empowered indoor digital contact tracing system for COVID-19 outbreaks in residential care homes

Infectious Disease Modelling 2024年第2期9卷 474-482页

作者： Jiahui Meng Justina Yat Wa Liu Lin Yang Man Sing Wong Hilda Tsang Boyu Yu Jincheng Yu Freddy Man-Hin Lam Daihai He Lei Yang Yan Li Gilman Kit-Hang Siu Stefanos Tyrovolas Yao Jie Xie David Man David H.K.Shum School of Nursing The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina Electronic and Information engineering The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina Research centre of Textiles for Future Fashion The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina Department of Land Surveying and Geo-Informatics The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina Department of Applied Mathematics The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina The jockey club School of Public Health and Primary Care The Chinese University of Hong KongHong Kong Special Administrative RegionChina Department of rehabilitation Sciences The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina Department of Computing The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina Department of Health Technology and Informatics The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina Department of Nutrition and Food Studies George Mason UniversityUSA Tung Wah College Hong Kong Special Administrative RegionChina Mental Health Research centre The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina

An AI-empowered indoor digital contact-tracing system was developed using a centralized architecture and advanced low-energy Bluetooth technologies for indoor positioning,with careful preservation of privacy and data *** analyzed the contact pattern data from two RCHs and investigated a COVID-19 outbreak in one study *** evaluate the effectiveness of the system in containing outbreaks with minimal contacts under quarantine,a simulation study was conducted to compare the impact of different quarantine strategies on outbreak containment within *** significant difference in contact hours between weekdays and weekends was observed for some pairs of RCH residents and staff during the two-week data collection *** significant difference between secondary cases and uninfected contacts was observed in a COVID-19 outbreak in terms of their demographics and contact *** results based on the collected contact data indicated that a threshold of accumulative contact hours one or two days prior to diagnosis of the index case could dramatically increase the efficiency of outbreak containment within RCHs by targeted isolation of the close *** study demonstrated the feasibility and efficiency of employing an AI-empowered system in indoor digital contact tracing of outbreaks in RCHs in the post-pandemic era.

关键词： COVID-19 Indoor contact tracing Contact pattern Outbreak containment Artificial intelligence

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Dynamic Investigation of Interface Stress on Below-Knee Residual Limb in a Prosthetic Socket

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Tsinghua Science and Technology 2004年第6期9卷 680-683页

作者：贾晓红张明王人成金德闻 Division of Intelligent and Biomechanical System State Key Laboratory of Tribology Tsinghua University Beijing 100084 China jockey club rehabilitation engineering Center hong kong polytechnic university Hong Kong China

The dynamic effects of inertial loads on the interface stresses between a residual limb and the trans-tibial prosthetic socket were investigated. A 3-D nonlinear finite element model, based on the actual geometry of the residual limb, including internal bones and socket liner, was developed to study the mechanical interaction between the socket and the residual limb during walking. To simulate the friction/slip boundary conditions between the skin and liner, automated surface-to-surface contact was used. The results show that interface pressure and shear stress have a similar double-peaked waveform shape in the stance phase. The average difference in interface stresses between the cases with and without consideration of inertial forces is 8.4% in the stance phase and 20.1% in the swing phase. The results suggest that the dynamic effects of inertial loads on interface stress distribution during walking must be considered in prosthetic socket design.

关键词： prosthetic socket interface stress finite element analysis inertial load dynamic effect

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Virtual reality based multiple life skill training for intellectual disability:A multicenter randomized controlled trial

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Engineered Regeneration 2022年第2期3卷 121-130页

作者： James Chung-Wai Cheung Ming Ni Andy Yiu-Chau Tam Tim Tin-Chun Chan Alyssa Ka-Yan Cheung Ocean Yu-hong Tsang Chi-Bun Yip Wing-Kai Lam Duo Wai-Chi Wong Department of Biomedical engineering Faculty of EngineeringThe Hong Kong Polytechnic UniversityHong Kong 999077China Research Institute for Smart Ageing The Hong Kong Polytechnic UniversityHong Kong 999077China jockey club Smart Ageing Hub Department of Biomedical EngineeringFaculty of EngineeringThe Hong Kong Polytechnic UniversityHong Kong 999077China Department of Orthopaedics Pudong New Area People’s Hospital Affiliated to Shanghai Jiaotong UniversityShanghai 201299China Social Service Department Yan Chai HospitalHong Kong 999077China C2 Innovations and Research Limited Hong Kong 999077China Department of Kinesiology Shenyang Sport UniversityShenyang 110102China Sports Information and External Affairs centre Hong Kong Sports InstituteHong Kong 999077China

Life skill-based training is essential for intellectual disabled individuals to regain autonomy and social *** reality(VR)could deliver a nascent application that is more engaging and *** objective of this study was to evaluate the training effects of the VR-based multiple life skill training program on life skill perfor-mance,self-efficacy,memory,cognitive and behavioral functions via a multicenter randomized controlled trial.A total of 145 intellectual disabled participants were recruited for a randomized controlled trial with three in-tervention arms:VR(n=42);traditional(n=53);and control(n=50).The life skill tasks for the interventions included 1)grocery shopping,2)cooking,and 3)kitchen *** measures were performance scores for the three tasks,self-efficacy scale,digit span score,and Frontal Assessment Battery score,graded by blinded ***-after effects of each group were evaluated using separated Wilcoxon Signed-rank *** sig-nificantly improved cooking,cleaning performance,and memory span,while traditional training significantly improved shopping,cooking,and cleaning *** generalized estimating equation evaluated effects between groups adjusted for age,gender and intelligence quotient(IQ).VR had significantly larger improvement effects in cooking and cleaning than the control group and memory span compared to traditional training and controls *** appeared to be a significant confounder on the training *** work may consider developing artificial intelligence to customize programs depending on IQ level.

关键词： Mental retardation Intellectual development X-reality Immersive rehabilitation Metaverse

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Joint Biomechanics—Tissues, Structures and Functions

Joint Biomechanics—Tissues, Structures and Functions

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第三届全国康复医学青年学术会议

作者： Arthur F．T．MAK Eric W．C．TAM Alan C．Y．TANG Terry K．K．KOO jockey club rehabilitation engineering Center The hong kong polytechnic university jockey club rehabilitation engineering Center The hong kong polytechnic university jockey club rehabilitation engineering Center The hong kong polytechnic university jockey club rehabilitation engineering Center The hong kong polytechnic university

＜正＞Joints are anatomical linkages designed to facilitate relative motions between skeletal elements. An overview will be given on how the principles of mechanics can be applied to the study of joint functions at the tissue and structure levels. Examples will be drawn from the literature as well as from our recent research work on cartilage tissue mechanics, biomechanics of shoulder reconstruction after brachial plexus injury, and biomechanics of the human elbow. Topics to be covered in this lecture include- （1） Biomechanics of articular cartilage （2） Joint stability （3） Joint loading （4） Musculoskeletal simulations

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A Three - Dimensional Finite Element Model of the Foot and Ankle for Foot Support Design

A Three - Dimensional Finite Element Model of the Foot and A...

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第七届全国生物力学学术会议

作者： Jason Tak-Man CHEUNG jockey club rehabilitation engineering centre The Hong Kong Polytechnic University Hong Kong

＜正＞ Understanding of the biomechanics of human foot and ankle complex can help in designing a better foot support. Experimental approaches are limited to interfacial pressure measurement between the foot and supporting surface and gross motion tracking of major foot joints. The measurement of internal stress/strain and individual bony movement of the foot and ankle, which is essential in enhancing knowledge on the biomechanics of the foot, is still sparse due to experimental difficulties. Computer simulation provides an efficient alternative to acquire those important clinical parameters. In this study, a 3D finite element model of the human foot and ankle, incorporating realistic geometrical properties of both bony and soft tissue components was developed to quantify the biomechanical interaction among bones, ligaments, interaction

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高牢度、柔性超疏水织物用于超宽带高效微波吸收（英文）

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engineering 2024年第10期 161-171页

作者：张仲孟雅鑫方新锐王庆王训该牛海涛周华 Laboratory for Manufacturing Low Carbon and Functionalized Textiles in the Universities of Shandong Province College of Textiles & Clothing Qingdao University Collaborative Innovation Center for Eco-Textiles of Shandong Province and the Ministry of Education Collaborative Qingdao University Research centre of Textiles for Future Fashion JC STEM Lab of Sustainable Fibers and Textiles School of Fashion and Textiles The Hong Kong Polytechnic University

Microwave absorption（MA） materials are essential for protecting against harmful electromagnetic *** this study,highly efficient and ultrawide-band microwave-absorbing fabrics with superhydrophobic surface features were developed using a facile dip-coating method involving in situ graphene oxide（GO） reduction,deposition of TiO2nanoparticles,and subsequent coating of a mixture of polydimethylsiloxane（PDMS） and octadecylamine（ODA） on polyester *** to the presence of hierarchically structured surfaces and low-surface-energy materials,the resultant reduced GO（rGO）/TiO2-ODA/PDMS-coated fabrics demonstrate superhydrophobicity with a water contact angle of 159° and sliding angle of 5°.Under the synergistic effects of co nduction loss,interface polarization loss,and surface roughness topography,the optimized fabrics show excellent microwave absorbing performances with a minimum reflection loss(RLmin) of-47.4 dB and a maximum effective absorption bandwidth(EABmax) of 7.7 GHz at a small rGO loading of 6.9 wt%.In addition,the rGO/TiO2-ODA/PDMS coating was robust,and the coated fabrics could withstand repeated washing,soiling,long-term ultraviolet irradiation,and chemical attacks without losing their superhydrophobicity and MA properties,Moreover,the coating imparts self-healing properties to the *** study provides a promising and effective route for the development of robust and flexible materials with microwave-absorbing properties.

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Gait Analysis in Lower-limb Prosthetic fitting

Gait Analysis in Lower-limb Prosthetic fitting

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中国康复医学会第四届会员代表大会暨第三届中国康复医学学术大会

作者： Dr.MingZhang jockey club rehabilitation engineering centre the hong kong polytechnic university hong kong China

A well-developed gait analysis can be advantageous in the prosthetic fitting to optimise the prosthe-sis design and to monitor an amputee’s rehabilitation progress. Skilled prosthetists can evaluate prostheticfitting by observation and comparison of an amputee’s gait with the normal gait. Advanced instrumentalgait systems make it possible to quantitatively and systematically assess subtle and rapid deviations ofgait. Gait analyses, including qualitative observation, quantitative measurement and biomechanicalanalysis, have been widely used in prosthetic fitting.

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水凝胶在多相离子溶液中的力电化学行为

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清华大学学报（自然科学版） 2003年第2期43卷 230-233页

作者：何智江陆明万 MAK A F T SUN Shan HON Y C 清华大学工程力学系北京100084 jockey club rehabilitation engineering Center Hong Kong Polytechnic University Department of Mathematics City University of Hong Kong

为分析多相离子溶液中智能材料水凝胶的力电化学耦合行为,提出了一种简单耦合分析方法。该方法将多相混合介质理论的基本方程分解为具有简单耦合关系的两个问题:电化学平衡问题和两相流动问题。以稳态压差下的渗透问题为算例,对生物软... 详细信息

为分析多相离子溶液中智能材料水凝胶的力电化学耦合行为,提出了一种简单耦合分析方法。该方法将多相混合介质理论的基本方程分解为具有简单耦合关系的两个问题:电化学平衡问题和两相流动问题。以稳态压差下的渗透问题为算例,对生物软组织材料和水凝胶的力电化学响应进行了数值分析。计算结果表明,该方法能有效地分析生物软组织材料的响应并对水凝胶的响应提出预测。

关键词：多相离子溶液智能材料多相混合介质水凝胶力-电-化学耦合行为人造肌网网格结构

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The Bimechanics of Wheelchair Maneuvers

The Bimechanics of Wheelchair Maneuvers

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中国康复医学会第四届会员代表大会暨第三届中国康复医学学术大会

作者： Arhtur FT Mak WN LAM jockey club rehabilitation engineering Center The hong kong polytechnic university

Wheelchair maneuvers are daily activities for many people with disabilities, just likewalking for those who can. lmproper wheelchair maneuvers, either due to inappropriate wheelchair pre-scriptions or inappropriate propulsion habits, could lead to secondary injuries to joints in the upper *** presentation would review the current literatures on the kinematics and kinetics of wheelchairpropulsion and present recent work in our Center on the biomechanics of wheelchair *** is a frequent indoor routine, but very few studies on wheelchair turning have not been re-ported so far. We have studied wheelchair turning with both non-disabled subjects and spinal cord in-jured subuects. Special instrumented smart wheels were used to measure the reaction forces acting on thehands by the push-rims. VICON motion analysis system was used to monitor the movements of both up-per extremities. Subjects were instructed to go through a simple protocol of wheelchair maneuvers that in-volved forward propulsion, left and right turing. Joint forces in the turning side and the pivtal side will becompared. Comparisons will also be made between joint forces in the dominant arms and the non-domi-nant *** will be made on the implications of these results on the consequences of inappropriatewheelchair maneuver habits and of inappropriate wheelchair prescriptions.

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MUTUAL INFORMATION BASED 3D NON-RIGID REGISTRATION OF CT/MR ABDOMEN IMAGES

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Journal of Shanghai Jiaotong university(Science) 2001年第2期6卷 171-175页

作者：胡海波刘聚卑 CHARLIE S.J.Xiao 庄天戈 Dept. of Biomedical Eng. Shanghai Jiaotong Univ. jockey club rehabilitation Eng. centre Hong Kong Polytechnic Univ

A mutual information based 3D non-rigid registration approach was proposed for the registration of deformable CT/MR body abdomen images. The Parzen Windows Density Estimation (PWDE) method is adopted to calculate the mutual information between the two modals of CT and MRI abdomen images. By maximizing MI between the CT and MR volume images, the overlapping part of them reaches the biggest, which means that the two body images of CT and MR matches best to each other. Visible Human Project (VHP) Male abdomen CT and MRI Data are used as experimental data sets. The experimental results indicate that this approach of non-rigid 3D registration of CT/MR body abdominal images can be achieved effectively and automatically, without any prior processing procedures such as segmentation and feature extraction, but has a main drawback of very long computation time.

关键词： medical image registration multi-modality mutual information non-rigid Parzen window density estimation

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