This paper presents a novel wearable walking assistance device for the elderly to provide physical gait assistance. The device, be worn invisibly underneath clothes, not only fits tightly wearer's lower body, but also comfortably transmits assistive torque hip/knee joint. To overcome deficiencies in usability of conventional devices, two features are proposed: 1) unique flexible support frame that withstands vertical loads while maintaining natural curvature body; and 2) kinematically...

This paper presents a novel wearable walking assistance device for the elderly, designed to aid them in their physical gait. In compliance with human motion and body, not only fits tightly lower body of wearer, but also transmits assisting torque hip/knee joint efficiently comfortably. To overcome poor wearability assistive performance conventional devices, three mechanisms are proposed: first, dual reduction actuator, which makes mechanism more compact minimal resistance, second, compliant...

This study explores the profound impact of varying oxygen content on microstructural and mechanical properties in specimens HO LO. The higher concentration specimen is found to significantly influence alpha lath sizes, resulting a size 0.5-1 μm, contrasting with 1-1.5 μm observed Pore fraction, governed by concentration, high HO, registering value 0.11%, whereas LO exhibits lower pore fraction (0.02%). Varied types each further underscore role shaping morphology. Despite these variations,...

This paper presents a novel self-aligning knee mechanism for walking assistance devices the elderly to provide physical gait assistance. Self-aligning joints can assist in flexion/extension motions of joint and compensate knee's transitional movements sagittal plane. In order center rotation, which moves with motion human joint, is proposed that adds redundant degrees freedom (i.e., 2-DoF) 1-DoF revolute joint. The key idea decouple rotations translations use lower-extremity wearable...

Background: Cytological diagnosis of pleural effusion plays an important role in the early detection and lung cancers. Recently, attempts have been made to overcome low diagnostic accuracy interobserver variability using artificial intelligence-based image analysis. However, such analysis is primarily performed at image-patch level not whole-slide (WSI) level. This study aims develop a WSI-level classification malignant effusions metastatic cancer based on fluid cytology quality-controlled,...

This paper proposes a new concept called "a flexible exoskeleton" and presents the design of wearable walking assistance device to provide physical gait for elderly. To overcome some limitations previous devices, 3 novel mechanisms are proposed: 1) thigh frames that withstand designated load direction, 2) an adjustable hip brace surrounding wearer's body, 3) slim backdrivable actuators minimize maximum height resistance. The proposed has reduced metabolic energy consumption by 13.2±4%...

This paper presents a novel flexible sliding thigh frame for gait enhancing mechatronic system. With its two-layered unique structure, the is in certain locations and directions, stiff at other locations, so that it can fît well to wearer's transmit assisting torque without joint loading. The describes basic mechanics of this 3D stiffness characteristics. We implemented on system conducted experiments. performance proposed mechanism verified by simulation

In this paper, tension propagation analysis of a newly designed multi-DOF robotic platform for single-port access surgery (SPS) is presented. The based on instantaneous kinematics the proposed 6-DOF surgical instrument, and provides decision criteria estimating payload instrument according to its pose changes specifications driving-wire. Also, wire-tension number reduction ratio manage such can be estimated, quantitatively. begins with derivation power transmission efficiency through...

Large-scale data sources, remote sensing technologies, and superior computing power have tremendously benefitted to environmental health study. Recently, various machine-learning algorithms were introduced provide mechanistic insights about the heterogeneity of clustered pertaining symptoms each asthma patient potential risk factors. However, there is limited information on performance these machine learning tools. In this study, we compared ten techniques. Using an advanced method...

The demand for autonomous nasopharyngeal swab sampling robot systems is increasing owing to the recent outbreak of respiratory virus pandemic. To protect medical staff from infection, automatic upper sample collecting robotic are needed. proposed in this study composed a unique force restriction mechanism, precise 3-axis sensor, and compact remote center motion (RCM) which designed enhance safety efficiency. mechanism has constant repulsive finely adjustable using specially leaf spring...

Bank customer churn prediction is one of the key businesses for modern commercial banks. Recently, various methods have been investigated to identify customers who would leave away. This paper proposed a new framework based on feature clustering and classification technique help banks make an effective decision problem. The method benefits from result data explorations, clusters features, makes with state-of-the-art classifier. When facing large amount missing items, it does not directly...

This paper presents an adjustable knee mechanism for walking assistance devices the elderly to provide physical gait assistance. The can assist in flexion/extension motions of joint and compensate transitional movements sagittal plane as well aligning frontal plane. In order center rotation, proposed is implemented by connecting several rolling cams with unique precisely calculated contact geometries. key idea realize linear motion accurate torque transmission a pulley method using which...

An empirical predictive relationship correlating bracketed duration to earthquake magnitude, site-to-source distance, and local site conditions (i.e. rock vs. stiff soil) for stable continental regions of North America is presented herein. The correlation was developed from data 620 horizontal motions central eastern (CENA), consisting 28 recorded 592 scaled motions. comprised nonzero zero durations. non-linear mixed-effects regression technique used fit a model the data. To account data,...

This paper presents an adjustable knee joint for a wearable robot the elderly, to provide physical gait assistance. In order compensate translational and rotational movements of in sagittal plane as well aligning frontal plane, proposed is implemented with rolling joint, two passive joints, four-bar linkage, sliding mechanism. Because mechanism, exist between actuator rotation angle flexion do not change equally due kinematic characteristics. define respect flexion/extension motion knee,...

An innovative single-port surgical robot has recently been developed by the Samsung Advanced Institute of Technology (SAIT). The can reach various sites inside abdominal cavity from a single incision on body. It two 7-DOF tools, 3-DOF endoscope, flexible hyper-redundant 6-DOF guide tube, and manipulator. This paper primarily focuses manipulator, called slave arm, which is capable setting location Remote Center Motion (RCM) point. Because tools explore area through small point when RCM...

In this study, we develop a nonlinear mixed modeling for the luminance degradation of flexible OLED, enabling precise lifetime prediction even with limited data obtained from 48h aging tests. A 4-parameter exponential model is employed, and its parameter estimated by NLME (nonlinear effect model)and NLS least square)method respectively. Considering time-dependent random behaviors an emissive layer deterioration, better fitted to empirical set than stretched decay (SED), examined...

For an advanced flexible mobile display, the elucidation of charge transfer mechanism emissive layer (EL) in organic light-emitting diode (OLED) is crucial to ensure performance and reliability. To determine long-term lifetime characteristics, two different ELs were exposed accelerated stress test on cell level then characterized by luminance-current-voltage (L-I-V), capacitance-voltage (C-V), impedance measurements. In addition, LDI-TOF analysis was employed for physical characterization....

The equivalent uniform cycle concept was originally developed for evaluating metal fatigue and has its roots in the macro cumulative damage hypothesis posed by Palmgren Miner. premise of is that a random load can be represented an equivalently damaging number cycles, which greatly facilitates testing specimens laboratory. proven to very useful geotechnical earthquake engineering, variant Palmgren-Miner been adopted compute strain cycles seismic compression unsaturated fills. Inherent assumed...

Nasopharyngeal swab is the most widely used diagnostic test for COVID-19 detection. However, enormous tests have posed a high risk of infection to medical professionals due close contact with patients and substantial health burden. While automation nasopharyngeal regarded as potential solution address these problems, quantitative study force safe effective control has not been performed yet. Hence, this presents applied during standard sampling procedure using handheld sensorized instrument....

We focus on the effects of process variation pixel definition layer (PDL) luminance degradation following a 2-parameter stretched exponential decay (SED) model. It is found that when shape parameter (β) > 1.1 in blue pixel, predicted lifetime can meet target reliability. also exhibited scale (τ) somewhat sensitive to an active area size. As long as varies within 3σ, reliability exists target. Using model 2-parameters (β, τ) and acceleration factor (n) extracted from long-term test, expected...