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About 6,405 papers for “device aging”

Smart Cushion Device for Elderly Aging in Place

Dion, Anna, Colley, Nate, Bravo, Leonardo · DigitalCommons - CalPoly (California State Polytechnic University) · 2024

Our task at hand is to develop a consumer-focused solution for improving elder care to provide additional peace of mind for seniors and caregivers using technology to extend independent living. We intend to create a device that will improve the quality of life of elderly individuals living alone by encouraging periodical movement throughout the day, along with monitoring pressure distribution and alerting when pressure concentration is potentially harmful. It will also alert users to the presence of moisture which can arise from spills or incontinence. The key stakeholders of this project include elderly adults over the age of 65 who live alone, along with their loved ones, supporters, and Apple Health Technologies, the sponsor of this project. This report will provide information pertaining to pressure ulcer formation and the effects of sedentary lifestyles in elderly, current research, patents, and on-market devices that aim to alleviate these conditions, and requirements set by Apple. It will then detail other objectives, including indications for use, customer requirements, engineering specifications and measurement methods, including high-risk details, and a discussion of our house of quality. Next, it will cover the project timeline, key deliverables, prototyping plans, the project’s critical path, morphology, the concept evaluation process, conceptual modeling, and the failure modes and effects analysis process. After that, it will address the detailed design process and prototype manufacturing plans. Then, it will cover detailed test plans for each engineering specification, including a summary table, detailed testing protocol, personnel, and expected outcomes. Finally, it will outline the results of each test, discuss the project as a whole, and address goals moving forward and conclusions. The device’s main functionalities are demonstrated in testing outcomes. The pressure localization test showed high accuracy in pressure recording among pixels with row and column standard deviations of 0.2 and 0.29 V respectively. It also showed short access times for data, with every row and column coming in under the 30-second threshold. The humidity test demonstrated the capability to sense moisture at multiple locations within the device, with each sensor registering an increase of at least 40% when exposed. The stationary time test showed the ability to detect high pressures, triggering every time the voltage went above the threshold value. It also showed the ability to detect extended periods of sitting, triggering within the time threshold two out of three times. The alert test demonstrated the ability to warn users with different sensory issues, with every alert scenario being recognized by the test subject.

Cited by 0

A Pragmatic Model to Predict Future Device Aging

James Brown, Kean Hong Tok, Rui Gao et al. · IEEE Access · 2023

To predict long term device aging under use bias, models extracted from voltage accelerated tests must be extrapolated into the future. The traditional model uses a power law, to linearly fit the test data on a log-log plot, and then extrapolates aging kinetics. The challenge is that the measured data do not always follow a straight line on the log-log plot, calling the accuracy of such prediction into question. Although there are models that can fit test data well in this case, their prediction capability for future aging is typically not verified. The key advance of this work is the development of a methodology for extracting models that can verifiably predict future aging over a wide (Vg, Vd) bias space, when aging kinetics do not follow a simple power law. This is achieved by experimentally separating aging into four types of traps and modelling each of them by a straight line individually. The applicability of this methodology is verified on 3 different CMOS processes where it can predict aging at least 3 orders of magnitude into the future. The contributions of each type of traps across the (Vg, Vd) space are mapped. It is also shown that good fitting with test data does not warrant good prediction, so that good fitting should not be used as the only criterion for validating a model.

Cited by 2Open access

Study on Clamping Way of Crankshaft Aging Device

LI Yan-zho · 2014

In order to solve the present situation of vibration aging whose result is bad, the vibration model and harmonic response characteristics of crankshaft in different holding cases were analyzed using ANSYS. It can achieve the best crankshaft vibration aging effect and provide references for the design.

Cited by 0

Concurrent Device/circuit Aging for General Reliability Simulations

Rare & Special e-Zone (The Hong Kong University of Science and Technology) · 2017

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Cited by 0

Multi-dimensional Parameter Fitting Method for Device Aging Modeling

Qianqian Sang, Xinhuan Yang, Chuanzheng Wang et al. · 2022

As semiconductor devices become smaller and smaller, device aging simulation plays an increasingly important role in the overall circuit design. In recent years, the research of device aging modeling has gradually become the focus of researchers. Most of the current aging modeling methods only consider the degradation of one parameter, resulting in inaccurate simulation of the model in actual testing. In response to this problem, this paper establishes an HCI(Hot Carrier Injection) aging model on NMOS devices, focusing on the simultaneous degradation of multiple parameters (drain current in saturation region <tex>$(I_{dsat})$</tex> and threshold voltage <tex>$(v_{th})$</tex> in the process of extracting model parameters. Simulation results show that this method can improve the fitting accuracy of aging model.

Cited by 0

Natural Aging Characteristics of Electro-Mechanical Arm Fire Device

Myunggeun Ahn, Dong‐Seong Kim, Seung‐gyo Jang · Journal of the Korean Society of Propulsion Engineers · 2024

This investigation undertakes a comprehensive analysis of the life extension and performance attributes of Electro-Mechanical Arm Fire Device(AFD) systems, manufactured between 2002 and 2006, that have undergone a natural aging process spanning approximately two decades.Aging characteristics were meticulously evaluated through a series of environmental tests, Closed Boom Tests(CBT), and Electromagnetic Compatibility(EMC) tests, all conducted in adherence to US military standards.Following disassembly, a thorough examination of internal components for aging and corrosion was performed.The combustion performance test, particularly the CBT, indicated that 90% of the targeted devices demonstrated passable performance.The system achieved certification for compliance in accidental ignition scenarios during EMC testing.Upon post-disassembly analysis, no evidence pertaining to moisture penetration was observed, and all AFDs exhibited normal operational functionality.Nevertheless, a subset of AFDs manifested component defects during a 30-day high-temperature storage test, specifically designed for accelerated aging simulations.While the Electro-Mechanical AFD showed no defects after its natural aging over two decades, minor discrepancies surfaced during additional accelerated aging tests.These discrepancies did not compromise arming and ignition performance, affirming the feasibility of extending the life extension by an additional three years.

Cited by 0Open access

Influence of Battery Aging on Converter Switching Device Degradation

Martijn Deckers, Silvia Colnago, Johan Driesen et al. · Lirias (KU Leuven) · 2023

In this work, a methodology to examine the influence of battery degradation on the converter semiconductor switching devices is presented. A PV-battery case study is used to demonstrate the methodology and show possible results. Initially, the results indicate a very limited influence of the battery on converter lifetime of 1 %. This is due to counteracting effects during battery degradation, which both decreases the power flow through the converter but increases the losses. A second simulation with constant power flow, isolating the effect of the reduced energy flow, showed an 9 % converter lifetime decrease using a degrading battery, demonstrating the underlying effect. The paper shows the battery model, converter model and case study results including battery degradation profiles, converter losses and reliability distributions.

Cited by 1Open access

Design and Research of Aging Device based on Ergonomics

Weiyi Wang · Frontiers in Science and Engineering · 2023

At present, the elderly over 65 years old occupy a high proportion of the population in China, and the aging trend is still increasing. The products used in the market to help the elderly stand and squat are developing rapidly and widely used, but they are uneven, which can not solve the problem of getting up at home for the elderly living alone. In this paper, a seat is designed for the elderly in China, and the structural module and control module of the seat are optimized. The main research contents are as follows: 1) The basic physiological characteristics of the elderly are analyzed based on ergonomics, and the related factors affecting the seat design of the elderly are analyzed in combination with physiology. According to the physiological conditions of human spine, intervertebral disc and hip compression, the basic parameters of seat basic form design are determined. The basic size of the seat for the elderly is constructed by using the parameters of the human body size model, and then combined with the literature, the correction value with higher comfort of the seat is selected to correct the size, and finally the basic shape size of the seat is determined; 2) Using proe software to carry out three-dimensional modeling. With reference to China's adult human body data standards, optimize the structure and parameter design of the elderly seat, determine the size and load-bearing of each component, and select the motor, ball screw and other components. The research shows that the elderly seat can help the elderly to complete the actions of getting up, sitting down and squatting, and the split gear design can be applied to the elderly of different heights.

Cited by 1Open access

CMOS reliability: From discrete device degradation to circuit aging

T. Nigam · 2013

Summary form only given. As we continue scaling towards 14 nm and beyond, reliability is becoming an integral part of the complete technology offering. Building in reliability is critical to the success of future scaling. As we marched towards the sub 100 nm technologies material changes have been necessary to meet the power, performance and reliability requirements. In sub 45 nm regime SiOx based dielectrics have been replaced by HK MG leading to new degradation mechanisms such as PBTI and also changed the understanding of existing mechanisms such as TDDB. As we scale further we need to comprehend interaction between device level variability pre and post stress and circuit functionality. In this talk I will address some of the challenges and correlation of device level reliability learning to simple circuits such ring oscillator and SRAM cells.

Cited by 2

Drug-Device Combinations: Are They Appropriate for the Aging Population?

Christine Kubus, Jeannette Y. Wick · The Consultant Pharmacist · 2016

Hundreds of marketed products combine drugs with delivery devices. Experts estimate that these drug-device combinations (DDCs) generated nearly $24 billion in sales in 2014. DDCs appeal to clinicians and consumers for several reasons. Drugs delivered with a technology-assist may cause fewer side effects, avoid systemic exposure, result in a higher degree of efficacy, or create consistent blood levels. When physicians prescribe a DDC, consultant pharmacists have a unique role: ensuring patients can use the DDC appropriately. Available DDCs require some degree of eye-hand coordination, and older individuals often have difficulty with vision, dexterity, and grip strength. This review primarily discusses three types of DDC: those designed for diabetics, inhalers, and transdermal DDCs, and the characteristics that can challenge older patients.

Cited by 5

Age Estimation Using Aging/Rejuvenation Features With Device-Edge Synergy

Mingxing Duan, Aijia Ouyang, Guanghua Tan et al. · IEEE Transactions on Circuits and Systems for Video Technology · 2020

Estimating human age is a challenging task in computer vision and most researchers are trying to make age estimation via a static facial image. However, it ignores the fact that the age of a person is the specific representation of aging. In this paper, we attempt to explore the aging/rejuvenation (AR) characteristics of faces for age estimation and we called the whole network as AR-Net. Firstly, we use GAN model for learning a manifold of the aging/rejuvenation process to a face dataset with preserving personalized face features ( <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">e.g.,</i> gender, race). Secondly, we seek the correlated aging/rejuvenation characteristics from a narrow age interval, ( <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">e.g.,</i> ((0-100) <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\rightarrow $ </tex-math></inline-formula> (0-5), (5-10),…, (90-100)). Thirdly, the fine-tuned GAN is used to generate aging/rejuvenation features of all age groups and these features are applied to train corresponding ELM regressors. AR-Net is deployed on every edge server, and all AR-Nets are trained offline. Afterwards, our AR-Net is constantly updated based on the face dataset collected by the edge sensors. Finally, enormous experiments on Morph-II, CACD, and captured facial dataset have been conducted to verify the performance of our fine-tuned AR-Net and the experimental results show that the approach enhanced than the current state of the art methods.

Cited by 21

Organic Current Mirror PUF for Improved Stability Against Device Aging

Zhaoxing Qin, Michihiro Shintani, Kazunori Kuribara et al. · IEEE Sensors Journal · 2020

Physically unclonable functions (PUFs) are important primitives in the field of hardware security. Their applications can be further broadened if PUFs are fabricated using organic thin-film transistors (OTFTs). Examples include smart packaging that proves authenticity of a contained product and privacy protection for information gathered by organic sensors. This paper proposes an organic current mirror PUF (OCM-PUF) that can be fabricated on a flexible substrate. The proposed OCM-PUF adapts a current mirror structure to achieve self-compensation of the device performance degradation of OTFTs, which is unavoidable in most organic materials. Two types of OCM-PUFs were designed using a low supply voltage OTFT to evaluate the metrics as a PUF. The fabricated OCM-PUFs maintained a reliability of nearly 95% over few weeks, thereby showing that the proposed PUF achieved a high tolerance against response changes caused by device aging.

Cited by 22

A Reliable and Economical Test Method for Semiconductor Device Aging

Xinhuan Yang, Qianqian Sang, Chuanzheng Wang et al. · 2022

The introduction of new energy vehicles has increased the demand for highly reliable chips, which makes chip aging analysis more and more important. Yet characterization of aging effects usually requires a large amount of test data, which consumes both device and test time. Therefore, a dependable aging test method is proposed in this paper. By determining the stress voltage for accelerated aging and corresponding test time according to the median degradation of device electrical indicators in the pretest. Conclusively, the aging model obtained by fitting the NMOS device test data is simulated and compared with the results of traditional test method based on the same aging time. It proves that the accuracy of this method and its practicality while reducing the cost of aging test.

Cited by 0

Understanding and Negotiating Aging: Older Women in Medical Device Experience Centers

Ji Hong Lim · Journal of Korean Women s Studies · 2025

이 연구는 ‘의료기 체험관’을 일상적으로 다니는 노년 여성들의 경험을 통해 노년 여성들의 생애 과정으로서 나이 듦을 분석한다. 흔히 의료기 체험관에 가는 노년 여성들은 나이 들어 외롭고 판단이 어려운 ‘사기당하는 무지한 노인’으로 표상되고, 무성적 존재로 여겨지며 여성으로서의 경험이 소거되는 중첩적 곤란을 겪는다. 그러나 이들의 체험관 경험에서 드러나는 바와 같이 노년 여성의 나이 듦에 대한 풍부한 해석이 요구된다. 70대 여성 연구참여자들은 아픈 몸을 나이 들어 당면한 결과로 받아들이지 않고 가족 부양을 위한 노동경험과 연결 지어 이해한다. 만성적으로 아픈 몸을 다스리는 기술은 자신과 가족을 돌봐온 경험으로부터 터득했으며, 병원과 다르게 여러 치료를 시도해 볼 수 있는 의료기 체험관에서 효능감을 얻는다. 또한 체험관의 유입 전략으로 나눠주는 생활용품을 가계의 책임자로서 유용하다고 여기고, 근면하게 살았던 삶의 방식이 매일의 체험관 출근 지속으로 유지되며 가족 부양으로 인해 접하지 못한 새로운 경험들로 즐거움을 느낀다. 그러나 체험관의 사기 담론을 의식해 체험관의 무지한 여성들과 다른 합리적 소비자인 나를 구분하며 긴장을 유지한다. 연구참여자들의 체험관 경험은 노년 여성의 생애와 밀접한 여성의 나이 듦의 영역으로 해석할 수 있었다. 이 같은 발견을 통해 노년 여성의 나이 듦을 단일하고 고정적으로 구축되지 않는, 삶의 연속선상에 있는 끊임없이 변화하는 과정으로 이해하기를 요청한다.

Cited by 0