A Rapid Adaptation Approach for Dynamic Air‑Writing Recognition Using Wearable Wristbands with Self‑Supervised Contrastive Learning

Wearable wristband systems leverage deep learning to revolutionize hand gesture recognition in daily activities.Unlike existing approaches that often focus on static gestures and require extensive labeled data,the proposed wearable wristband with selfsupervised contrastive learning excels at dynamic motion tracking and adapts rapidly across multiple scenarios.It features a four-channel sensing array composed of an ionic hydrogel with hierarchical microcone structures and ultrathin flexible electrodes,resulting in high-sensitivity capacitance output.Through wireless transmission from a Wi-Fi module,the proposed algorithm learns latent features from the unlabeled signals of random wrist movements.Remarkably,only few-shot labeled data are sufficient for fine-tuning the model,enabling rapid adaptation to various tasks.The system achieves a high accuracy of 94.9%in different scenarios,including the prediction of eight-direction commands,and air-writing of all numbers and letters.The proposed method facilitates smooth transitions between multiple tasks without the need for modifying the structure or undergoing extensive task-specific training.Its utility has been further extended to enhance human–machine interaction over digital platforms,such as game controls,calculators,and three-language login systems,offering users a natural and intuitive way of communication.

Prevalence and Disinfection of Bacteria Associated with Various Types of Wristbands

The potential role of personal items in the transmission of pathogens is poorly understood. In this study, we cultured bacteria of public health importance found on wristbands, determined whether there is a correlation between wristband material and prevalence, and tested three household disinfectants for efficacy in reducing bacteria on wristbands made of plastic, rubber, metal, and cloth, using standard microbiological assays. Total cultivable bacteria, Staphylococci, Enterobacteria (Escherichia coli), and Pseudomonas on 20 smartwatch wristbands were cultured from randomly recruited subjects. Nearly all wristbands (95%) were contaminated, with the highest average numbers of 3.46E+4 cfu/cm2 and 1.52E+4 cfu/cm2 on rubber and plastic bands respectively. Metallic gold and silver wristbands had zero to 18 cfu/cm2. While the high prevalence of Staphylococcus spp (85% of wristbands)—skin microbiota;was not unexpected, the occurrence of Pseudomonas spp (30%), and enteric bacteria (60%), even at relatively low numbers is of public health significance. Bacterial load on individual subjects varied remarkably with males and females harboring average total bacteria of 4.045 and 3.42 log10cfu/cm2 of wristband, respectively. The most important predictor of wristband bacteria load was the texture of wristband material and activity (hygiene) of the subject at sampling time. Potential pathogens—Staphylococcus aureus (8143 cfu/cm2) and Pseudomonas spp. (1126 cfu/cm2) were most abundant on cloth and rubber wristbands, respectively, while the presence of the E. coli group was associated with animal handling activity by a veterinarian. Lysol Disinfectant Spray and 70% Ethanol were highly effective regardless of wristband material with >99.99% kill rate and a log cfu/cm2 reduction of 3 - 4.0 and 3 - 4.5 respectively within 30 seconds. Apple Cider Vinegar (ACV) was not as potent. Only 2 - 3.5 log cfu/cm2 drop was obtained after 120 seconds of exposure. Further susceptibility assays with standard reference bacteria showed that Lysol and 70% alcohol effectively killed > 99.99% (>8 log CFU drop) of Escherichia coli strain 7001, Staphylococcus aureus strain 6538, and Pseudomonas aeruginosa strain 10662 within 30 seconds of contact. Vinegar had a similar efficacy on the gram negatives but little or no effect on Staph aureus (only a 2-log CFU/ml reduction in 5 minutes!) The high prevalence of potential pathogens, some of which could be reservoirs of antibiotic resistance reveals a weak link in infection control and underscores the need for regular cleaning of personal and hand-held accessories with adequate considerations of their texture.

适用于老年人旅游的智能腕带设计——以南山国家公园为例

随着我国人口老龄化程度加深,银发旅游成为热潮,老年人群体对旅游体验的要求也日益提高。因此,提升银发旅游体验的可穿戴设备也成为新宠,智能腕带便是可穿戴设备最为常见的种类之一。如可穿戴设备在迪士尼主题公园已广泛使用,其独特的体验方式可以提升游客旅游的满意度。针对南山国家公园旅游的老年人智能腕带,是以情感化设计理论为基础,对老年人的行为特点进行分析和对可穿戴设备的各种产品功能进行比较后,结合南山国家公园的特点设计而成的,在智能腕带的设计与应用上,更加注重产品的符号表达、用户体验和情感感受。

基于RFID的医用腕带读写器系统的设计与开发

随着医疗技术的不断发展,射频识别(RFID)技术被广泛应用于医疗领域。文章主要探讨了射频识别技术在医用腕带领域的发展,同时设计了一款基于RFID读写器的医疗腕带应用系统,该系统可以准确、快速识别病人信息。文章根据医疗领域的应用场景,对硬件和软件系统进行需求分析、概要设计、详细设计,最终选择了合适型号的RFID医用腕带、合适的阅读器选型、合适的技术方案,并在此基础上进行实验设计和开发,最终实现一个可用的整体解决方案。

复杂的情景收益:智能腕带用户的隐私决策研究

[目的/意义]智能腕带在给人们日常生活提供便利的同时,也产生了更加隐蔽且难以感知的隐私问题,本文旨在研究各种因素如何影响智能腕带用户的隐私披露意愿。[方法/过程]采用量化研究方法,依据隐私计算理论构建理论模型,围绕智能腕带用户的隐私决策过程,对影响其隐私披露意愿的因素进行探讨。通过对超过300名智能腕带用户进行问卷调查,再基于回收的304份有效问卷进行数据分析。[结果/结论]隐私计算理论在智能腕带场景下同样适用,复杂的情景收益导致非理性的隐私披露;主观规范和设备信任正向影响感知隐私决策收益,感知被动性正向影响感知隐私决策风险。

Design of a Biomedical Device to Reduce Anxiety Experienced by Patients Diagnosed with Parkinson’s Disease

Parkinson’s disease (PD) is a neurodegenerative disease that occurs due to loss of nerve cells that produce dopamine in the brain, affecting approximately 4 million people worldwide. PD patients often feel an increase in anxiety levels daily. While there are medications/exercises to help relieve anxiety, there are limited methods to reduce anxiety without the help of a caretaker. As a result, MEDIC Foundation, a non-profit organization in British Columbia, Canada, is designing an automated system that consists of a wristband and an application which uses vi-bration therapy to help reduce anxiety of PD patients. Literature reviews were conducted to document the project’s needs. Phase I of the project focused on de-veloping a prototype for the application and phase II on developing the wrist-band. The team developed prototypes of a wristband that automatically applies vibration near the median nerve as the heart rate variability (HRV) deviates away from the normal threshold of the user, and an application that displays real-time heart rate variability signals as well as provides for relaxation. The development of the prototype is still in early progress. By creating this automated system, we aim to provide a solution to senior PD patients to relieve anxiety independently. .

老年人智能手环控制系统的设计与实现

为方便照顾老年人日常健康和出行安全,本文开发适合老年人使用的智能手环控制系统。系统包括硬件端、服务器端和手机端监控软件端三大部分,以STM32F103作为开发主板,并配置了MPU6050六轴加速度、定位导航、心血氧监测、语音等传感器以及网络模块,具有心率查看、定位导航和摔倒警报等功能。测试的结果表明,该系统基本实现了所设计的各项功能,且运行稳定,有益于子女对老年人的智能化守护。

基于STM32的适老化健康检测手环

近年来,人口老龄化加剧,老人空巢现象越来越显著。一旦老人发生意外情况,其家人很难保证及时发现并予以抢救。因此,解决老人因突发状况遭遇不测的问题迫在眉睫。文章采用STM32系列的微控制器、温度传感器、GPS定位等设计并实现了一款适老化健康检测手环系统,它能够实时将老人的身体数据传输到终端,并在发生异常情况时自动进行报警。

基于单片机的可穿戴智能手环设计

为保障老年人健康安全,文章设计了一种基于STM32单片机的可穿戴智能手环。手环具有健康监测和危险警报系统,可实时监测老年人身体健康状况,以及发生危险情况时自动报警。手环还具有GPS定位功能,方便家人实时了解佩戴者的位置信息。该设计具有较高的实用性,可为老年人健康安全提供有力支持。

PMDs及手环血氧仪在阻塞性睡眠呼吸暂停低通气综合征诊断中的应用

目的:分析便携式睡眠监测仪(PMDs)及手环血氧仪在阻塞性睡眠呼吸暂停低通气综合征(OSAHS)诊断中的应用价值。方法:选取2020年8月至2022年3月石狮市医院因夜间睡眠时打鼾就诊的128例患者为研究对象,所有患者均行多导睡眠图(PSG)、PMDs、手环血氧仪诊断,以PSG检查结果为标准,比较PMDs、手环血氧仪的诊断特异度、灵敏度、准确度。结果:PSG监测阳性患者111例,阴性患者17例;以PSG监测结果为标准进行分析,PMDs监测、手环血氧仪监测之间特异度、灵敏度、准确度比较,差异均无统计学意义(P>0.05)。三种监测方式的睡眠呼吸暂停低通气指数(AHI)、平均血氧饱和度、最低血氧饱和度、动脉血氧饱和度<90%时间比较,差异均无统计学意义(P>0.05)。结论:PMDs及手环血氧仪诊断OSAHS均具有较高的诊断效能,且携带、操作简便,可用于患者临床及日常诊断。

Validity and Reliability of the Wristband Activity Monitor in Free-living Children Aged 10-17 Years

Objective In this study we aimed to examine the reliability and validity of the wristband activity monitor against the accelerometer for children.Methods A total of 99 children(mean age = 13.0 ± 2.5 y) wore the two monitors in a free-living context for 7 days. Reliability was measured by intraclass correlation to evaluate consistency over time.Repeated-measures analyses of variance was used to detect differences across days. Spearman’s correlation coefficient(rho), median of absolute percentage error, and Bland-Altman analyses were performed to assess the validity of the wristband against the Acti Graph accelerometer. The optimal number of repeated measures for the wristband was calculated by using the Spearman-Brown prophecy formula.Results The wristband had high reliability for all variables, although physical activity data were different across 7 days. A strong correlation for steps(rho: 0.72, P < 0.001), and moderate correlations for time spent on total physical activity(rho: 0.63, P < 0.001) and physical activity energy expenditure(rho: 0.57, P < 0.001) were observed between the wristband and the accelerometer. For different intensities of physical activity, weak to moderate correlations were found(rho: 0.38 to 0.55, P < 0.001).Conclusion The wristband activity monitor seems to be reliable and valid for measurement of overall children’s physical activity, providing a feasible objective method of physical activity surveillance in children.

探索小儿腕带佩戴依从性影响因素及腕带改良应用效果

目的:探究影响小儿腕带佩戴依从性的因素并分析腕带改良方法的应用效果。方法:选取2020年6月至2021年6月本院收治患儿206例,按照随机数字表法分为研究组与对照组,各103例。结果:研究组患儿住院当天、第3天及出院时的腕带佩戴依从率均高于对照组(P<0.05)。二元Logistic回归分析显示,年龄>12个月、腕带周长>12cm及使用改良腕带为小儿腕带佩戴依从性的保护因素(P<0.05)。结论:患儿的年龄、腕带周长及腕带类型为小儿腕带佩戴依从性的主要影响因素。

脉象采集腕带系统设计

针对传统中医脉诊存在主观性过强、无定量描述的问题,根据中医脉诊理论,结合现代传感技术,设计了一种脉象采集腕带系统。该系统采用充气式腕带缠绕于受试者腕部,通过控制腕带压力模拟不同的取脉压力,采用气压传感器采集受试者的脉搏信号,并通过设计上位机软件实现了系统控制、脉搏信号处理、可视化及数据存储。测试结果显示,系统能够准确地采集受试者的脉搏信号,并能够对最佳取脉压力进行计算。

智“表”随行——智慧养老服务平台

研究了现有养老模式,提出以小区为单位,手环为依托,建立起家人、物管、医院、商家紧密围绕老年人的智慧养老服务平台。该平台能够降低智慧养老模式的实现成本、简化使用难度、提供完善的健康保障服务、推动实现医疗与生活服务结合的目标。

智能家居就寝模式的手环设计

智能手环作为一种可穿戴式设备逐渐大众化。文章针对智能家居触发就寝模式的自动化实现,设计了一款智能手环,结合物联网技术,实现对智能家居产品的一体化控制。文章通过硬件设计、软件设计、外观设计以及App交互设计,实现了智能家居就寝模式,为智能家居技术的发展提供了参考。

气相色谱法检测驱蚊环、驱蚊贴中的化学驱蚊成分

旨在建立一种分析方法,以测定近年来市场上出现的驱蚊环、驱蚊贴等新型驱蚊产品中可能存在的避蚊胺、驱蚊酯、羟哌酯等化学驱蚊成分。确定了超声萃取的前处理方法、气相色谱法(火焰离子化检测器)的色谱条件,以邻苯二甲酸二戊酯为内标物的内标定量方法。该方法前处理过程简便、线性和重复性良好,检出限<0.01%,能够满足检测要求。通过对94个实际样品的测定,证明该方法具有较好的实用性。

运用品管圈降低儿童病房腕带佩戴缺陷率的实践

目的:探讨品管圈管理工具在提高儿童病房腕带佩戴率中的作用。方法:运用品管圈对儿童病房腕带佩戴缺陷进行质量分析、改进,并对实施品管圈活动前、后状况进行比较。结果:儿童病房腕带佩戴缺陷率由实施品管圈活动前的89.2%降低至实施后的34.4%。结论:应用品管圈质量改进工具可提高患儿腕带佩戴的依从性及佩戴率,同时能保障医疗安全、提高圈员运用品管圈管理工具解决临床实际问题的能力,该方法值得儿童病房推广应用。

护理人员对患者身份核对的现状与对策

目的了解护理人员对患者身份核对的认知程度、临床上对患者身份核对的现状以及质量控制检查的情况,为更有效地实施医院患者身份核对提供依据。方法研究者自行设计问卷,对159名护理人员进行患者身份核对知识及相关问题的调查。结果 91.2%的护理人员知道正确的患者身份确认方式。在临床实践中,81.8%的研究对象使用正确的方式确认患者身份。护士未能规范核对的原因有多种,护士核对过程缺乏管理者的督导,约1/5的护士认为因为没有规范核对而导致过差错发生。结论护理人员患者身份核对的现状不容乐观,应积极采取措施强化护士的核对意识和行为,以保障患者安全。

临床检验标本采集识别系统的开发与应用

目的应用无线网络技术和掌上电脑的方便、快捷功能,将"临床检验标本采集识别系统"集成在移动护士工作站中。方法通过在床旁扫描病人佩戴的腕带条码,系统自动通过无线网络从医院信息系统获取病人的相关信息和医嘱,并从临床检验信息系统获取病人的检验项目、试管类型、标本类型等;护士根据系统提示为病人采集标本,扫描试管条码后,系统对试管的条码进行确认,并将试管和该病人的信息通过临床检验信息系统进行对应。结果减少了临床检验标本采集过程中的中间环节及人工标识等繁杂重复工作,简化了工作程序,缩短了间接护理时间,降低了由于护理操作产生的危险因素和差错发生率,提高了护理工作的准确性和实效性。结论护士采集的标本能够实时地进入检验信息系统,检验科通过系统可直接获取检验信息并及时将检验结果反馈给临床科室。

儿科有陪病房标识腕带佩戴依从性调查及护理对策

目的调查儿科有陪病房患儿标识腕带佩戴情况,探讨影响儿科有陪病房标识腕带佩戴依从性的相关因素,为提高儿科住院患儿佩戴标识腕带的依从性提供科学方法。方法采用自制问卷对552例住院患儿及家长进行随机调查,分析影响患儿标识腕带佩戴的因素。结果本组住院患儿未佩戴标识腕带者占24.3%,未佩戴的主要原因有医务人员腕带识别制度未落实、健康教育落实不到位、标识腕带佩戴不方便、不舒适,腕带大小不合适易脱落等。结论提高医护人员对使用标识腕带的认识,规范患儿腕带的使用流程,落实相关健康宣教,使佩戴标识腕带人性化,加强督查,可有效提高患儿佩戴标识腕带的依从性。