A novel hand strength assessment method integrated into haptic knob for stroke rehabilitation

2013 ◽  
Author(s):  
Longjiang Zhou ◽  
Kai Keng Ang ◽  
Chuanchu Wang ◽  
Kok Soon Phua ◽  
Cuntai Guan
Keyword(s):  
Stroke Rehabilitation ◽  
Assessment Method ◽  
Hand Strength ◽  
Strength Assessment

Assessment of Free Spanning Pipeline Strength

2013 ◽  
Vol 310 ◽  
pp. 194-197
Author(s):  
Hong Jun Zhu ◽  
Xing Qi ◽  
Yong Chuang Yang ◽  
Ming Yang Wang ◽  
Xiao Xu Liu ◽  
...  
Keyword(s):  
Yield Strength ◽  
Fatigue Failure ◽  
Assessment Method ◽  
Submarine Pipeline ◽  
Strength Assessment ◽  
Buckling Strength ◽  
Safety Design ◽  
Pipeline Failures

Submarine pipeline failures usually occur at free span part, and free spanning pipeline is easily induced vibration by vortex, which accelerates the fatigue failure of pipe. Therefore, it is necessary to assess the strength of free spanning pipeline at regular intervals. In this paper, considering the effects of VIV, resonance assessment and yield strength assessment as well as buckling strength assessment are enumerated. And an illustration is calculated to verify the reliability of assessment method. This research may provide a guide for safety design, installation and maintenance of submarine pipeline.

Open-source 3D printed sensors for hand strength assessment: Validation of low-cost load cell and fabric sensor-based systems

2018 ◽  
Vol 65 (5) ◽  
pp. 412-419 ◽  
Author(s):  
Claudia R. Cutler ◽  
Anita L. Hamilton ◽  
Emma Hough ◽  
Cheyenne M. Baines ◽  
Ross A. Clark
Keyword(s):  
Open Source ◽  
Low Cost ◽  
Load Cell ◽  
Hand Strength ◽  
Strength Assessment ◽  
Assessment Validation ◽  
Printed Sensors ◽  
3D Printed

Study on the Wave Loads and Strength Assessment Method on Semi-Submersible Platform

2009 ◽  
Author(s):  
Hui Li ◽  
Huilong Ren ◽  
Tao Wei ◽  
Guoqing Feng
Keyword(s):  
Fatigue Strength ◽  
Assessment Method ◽  
Wave Method ◽  
Wave Loads ◽  
Strength Assessment ◽  
Buckling Strength ◽  
Comprehensive Comparison ◽  
Comparison Of The Results ◽  
Classification Society

In this paper, the wave loads of a semi-submersible platform is calculated by the deterministic design wave method and the stochastic design wave method based on the rules established by ABS and DNV classification society respectively. Then, the yielding strength, buckling strength and fatigue strength of important members are assessed according to these different rules. Through the comprehensive comparison of the results of wave loads and strength assessment, the differences between these rules are summarized. Then some significant suggestions are given.

scholarly journals Development and evaluation of a novel flex sensor-based glenohumeral subluxation degree assessment for wearable shoulder sling

2021 ◽  
Author(s):  
Shuangyuan Huang ◽  
Jiaming Zhou ◽  
Yude Yang ◽  
Zhonghua Chen ◽  
Shiman He ◽  
...  
Keyword(s):  
Gold Standard ◽  
Stroke Rehabilitation ◽  
Glenohumeral Joint ◽  
Assessment Method ◽  
Strongly Correlated ◽  
Radiographic Assessment ◽  
Valuable Method ◽  
Relationship Of ◽  
The Relationship ◽  
Shoulder Sling

Abstract Background: Glenohumeral subluxation (GHS) is reported in as many as 81% of patients with stroke, which presents considerable challenges for individuals involved in stroke rehabilitation. During rehabilitation, the joint head of the glenohumeral joint was maintained in the socket by wearing a GHS shoulder sling. To ensure that the glenohumeral joint head is in the socket, an orthosis is required to automatically adjust the degree of orthosis according to the degree of GHS. However, there is currently no wearable method for assessing the degree of GHS. This study aims to develop a GHS assessment method for patients with stroke that has the potential to be integrated into a wearable shoulder sling.Methods: To that end, we developed a GHS assessment method for patients with stroke based on a flex sensor, which has the potential to be integrated into a wearable shoulder sling. Seventeen patients with stroke in a diverse degree of GHS were recruited for the study. The curvature difference of the affected shoulder in the subluxation and reduction states was collected by flex sensor to calculate the degree of GHS (AGTD). Meanwhile, the GHS degree, calculated as the acromion–greater tuberosity distance di.fference (AGTD) of the affected and unaffected shoulder, was measured by the gold-standard radiographic assessment.Results: The GHS degree measurement by flex sensor and radiographic assessment has strongly correlated (r = 0.92, p < 0.01). The relationship of GHS degree measured by radiographic assessment (AGTD) and flex sensor (AGHS) is linear according to an interpolating curve with an equation: AGHS = 0.767AGTD + 1.781 (R2 = 0.84, RMSE = 1.61). The method has excellent reliability with R = 0.87, CI = 95% for assessment of GHS degrees.Conclusions: The proposed method demonstrates good performance, is wearable, easy to use, and allows automatic measurements, so as to be a valuable method to assessment of GHS.

Fitness for Purpose Assessment of Girth Weld Defect Based on In-Line Inspection

2016 ◽  
Vol 853 ◽  
pp. 524-528
Author(s):  
Jian Chen ◽  
Zheng Qiang Lei ◽  
Fu Xiang Wang ◽  
Ting Wang ◽  
Ming Fei Li
Keyword(s):  
Oil And Gas ◽  
Assessment Method ◽  
Assessment Procedure ◽  
Defect Characterization ◽  
Strong Impact ◽  
Plastic Collapse ◽  
Fitness For Purpose ◽  
Strength Assessment ◽  
Weld Defects ◽  
Weld Defect

The girth weld defect is one of the most common types of defects on oil and gas pipelines, which can have a strong impact on the operation safety. Several girth weld failure accidents have occurred on PetroChina’s pipelines in recent years. In this paper, PetroChina’s current work on inspection and fitness for purpose assessment of girth weld defects is summarized. The in-line inspection has been proved to be the best practice for oil and gas pipeline defect inspection, but there are still some technical issues such as defect characterization and parameter selection. Fitness for purpose assessment methods for girth weld defects include strength assessment method based on plastic collapse, FAD method based on both plastic collapse and fracture, simplified factor method and numerical analysis method based on finite element. It is critical to identify the actual type of defects detected in in-line inspection to select an appropriate assessment method. The identification of various loads and the selection of appropriate material parameters are also important issues in assessment procedure. The key techniques to be developed include defect characterization, load identification, assessment of defects on high grade steel pipes, reliability-based assessment, etc.

Fatigue Yield of Ship Structures

2009 ◽  
Author(s):  
Kalman Zˇiha ◽  
Branko Blagojevic´
Keyword(s):  
Fatigue Strength ◽  
Fatigue Damage ◽  
Fatigue Analysis ◽  
Assessment Method ◽  
Rule Based ◽  
Strength Assessment ◽  
Variable Amplitude ◽  
Damage Progression ◽  
Double Hull ◽  
Fatigue Endurance

The paper on the first place summarizes the fatigue yield approach as a cause-effect interaction between fatigue damage progression and fatigue endurance. Secondly it investigates the fatigue strength worsening on experimental S-N data and the load variability effects in shipbuilding. Next it applies the Classification Society’s rule-based procedure for fatigue analysis of ship’s structure that uses a simplified fatigue strength assessment method. The example elaborates fatigue yield effect on the seagoing operation of a double hull 47400 tdw tanker. At the end the paper recommends the procedure for assessment of ship lifetime shortening due to the fatigue yielding under constant and variable amplitude block loadings.

Study on the Residual Strength Assessment Method on Corroded Subsea Pipeline Based on Reference Stress Method

2009 ◽  
Author(s):  
Hui Li ◽  
Xiaobing Pan ◽  
Huilong Ren ◽  
Guoqing Feng
Keyword(s):  
Residual Strength ◽  
Assessment Method ◽  
Von Mises Stress ◽  
Strength Assessment ◽  
Subsea Pipeline ◽  
Reference Stress ◽  
Minimum Cross Section ◽  
Input Pressure ◽  
Von Mises ◽  
The Relationship

In this paper, the reference stress method is adopted in the residual strength assessment of corroded subsea pipeline. Through the monitoring of the von Mises stress σlocal in the minimum cross section, the relationship between the stress response and input pressure is found. Then, based on this relationship, a simple and effective method to assess the residual strength of corroded subsea pipeline is proposed. Through the comparison with experimental results, the accuracy and reliability of this method is confirmed.

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