A computer based vertical force monitoring and analysis system for gait evaluation

2002 ◽  
Author(s):  
I. Lackovic ◽  
V. Bilas ◽  
A. Santic
Keyword(s):  
Vertical Force ◽  
Force Monitoring ◽  
Computer Based ◽  
Analysis System

Development and Application of Graphics Displays for a Mini-Computer Based Vibration Analysis System

1992 ◽  
Author(s):  
Bill Trevillion
Keyword(s):  
Three Dimensional ◽  
Large Data ◽  
Electric Utility ◽  
Chemical Processing ◽  
Acoustic Data ◽  
Interactive Display ◽  
Computer Based ◽  
Data Files ◽  
Vibration Problems ◽  
Analysis System

Abstract Radian Corporation has developed extensive data display capabilities to analyze vibration and acoustic data from structures and rotating equipment. The Machinery Interactive Display and Analysis System (MIDAS) displays data collected through the acquisition functions of MIDAS. The graphics capabilities include displaying spectra in three-dimensional waterfall and in X-Y formats. Both types of plots can relate vibrations to time, equipment speed, or process parameters. Using menu-driven parameter selection, data can be displayed in formats that are the most useful for analysis. The system runs on a popular mini-computer, and it can be used with a great variety of graphics terminals, workstations, and printer/plotters. The software was designed and written for interactive display and plotting. Automatic plotting of large data files is facilitated by a batch plotting mode. The user can define display formats for the analysis of noise and vibration problems in the electric utility, chemical processing, paper, and automotive industries. This paper describes the history and development of graphics capabilities of the MIDAS system. The system, as illustrated in the examples, has proven efficient and economical for displaying large quantities of data.

Crankshaft Stress Analysis—Combination of Finite Element and Classical Analysis Techniques

1990 ◽  
Vol 112 (3) ◽  
pp. 268-275 ◽  
Author(s):  
A. R. Heath ◽  
P. M. McNamara
Keyword(s):  
Stress Analysis ◽  
Concept Design ◽  
Low Friction ◽  
Failure Investigation ◽  
Engine Design ◽  
Computer Based ◽  
Analysis System ◽  
High Level ◽  
Engine Components ◽  
Oil Films

The conflicting legislative and customer pressures on engine design, for example, combining low friction and a high level of refinement, require sophisticated tools if competitive designs are to be realized. This is particularly true of crankshafts, probably the most analyzed of all engine components. This paper describes the hierarchy of methods used for crankshaft stress analysis with case studies. A computer-based analysis system is described that combines FE and classical methods to allow optimized designs to be produced efficiently. At the lowest level simplified classical techniques are integrated into the CAD-based design process. These methods give the rapid feedback necessary to perform concept design iterations. Various levels of FE analysis are available to carry out more detailed analyses of the crankshaft. The FE studies may feed information to or take information from the classical methods. At the highest level a method for including the load sharing effects of the flexible crankshaft within a flexible block interconnected by nonlinear oil films is described. This method includes the FE modeling of the complete crankshaft and the consideration of its stress field throughout an engine cycle. Fatigue assessment is performed to calculate the distribution of fatigue safety factor on the surface of the crankshaft. This level of analysis can be used for failure investigation, or detailed design optimization and verification. The method is compatible with those used for vibration and oil film analysis.

scholarly journals Insole optical fiber Bragg grating sensors network for dynamic vertical force monitoring

2017 ◽  
Vol 22 (9) ◽  
pp. 091507 ◽  
Author(s):  
Maria Fátima Domingues ◽  
Cátia Tavares ◽  
Cátia Leitão ◽  
Anselmo Frizera-Neto ◽  
Nélia Alberto ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Vertical Force ◽  
Fiber Bragg Grating Sensors ◽  
Force Monitoring ◽  
Optical Fiber Bragg Grating

THE DEVELOPMENT OF A COMPUTER-ASSISTED TOOL FOR THE ASSESSMENT OF NEUROPSYCHOLOGICAL DRAWING TASKS

2008 ◽  
Vol 07 (04) ◽  
pp. 751-767 ◽  
Author(s):  
STEPHANIE GLENAT ◽  
LAURENT HEUTTE ◽  
THIERRY PAQUET ◽  
RICHARD GUEST ◽  
MICHAEL FAIRHURST ◽  
...  
Keyword(s):  
Software Engineering ◽  
Computer Assisted ◽  
Computer Based ◽  
Design Requirements ◽  
Drawing Tasks ◽  
Analysis System ◽  
Clinician Support ◽  
Flow Of Information ◽  
Modular Framework ◽  
Actual Test

In a previous paper, we highlighted the design requirements of a computer-based system for the automated assessment of neuropsychological drawing tasks. In this paper, we shall examine the implementation of an analysis system specifically with reference to the software engineering principles utilized and the modular framework within with a flexible implementation can be realized. We shall highlight some of the implemented modules and, using two actual test batteries as examples, demonstrate the flow of information between each module. We shall also show the additional reporting and analysis features implemented for clinician support and describe how the framework can be utilized for more generic applications of handwriting/drawing analysis.

A computer-based data analysis system for enzyme-linked immunosorbent assays

1983 ◽  
Vol 65 (1-2) ◽  
pp. 83-95 ◽  
Author(s):  
Thomas R. Slezak ◽  
Martin Vanderlaan ◽  
Ronald H. Jensen
Keyword(s):  
Data Analysis ◽  
Computer Based ◽  
Immunosorbent Assays ◽  
Analysis System ◽  
Data Analysis System

scholarly journals Identification of Stable Asymptotic Performance on Computer-Based Cognitive Tests

1998 ◽  
Vol 42 (11) ◽  
pp. 826-830 ◽  
Author(s):  
Byeong-Cheol Hwang ◽  
Robert E. Schlegel ◽  
Randa L. Shehab
Keyword(s):  
Statistical Analysis ◽  
Cognitive Performance ◽  
Graphical Analysis ◽  
Performance Measure ◽  
Learning Curves ◽  
Cognitive Tests ◽  
Performance Tasks ◽  
Computer Based ◽  
Analysis System ◽  
The Stability

Examining whether human cognitive performance is affected by environmental conditions requires stable performance measures prior to stressor exposure. This study evaluated the stability and reliability of six computer-based cognitive performance tasks. A Microsoft Excel Visual Basic for Applications (VBA) macro program, the Stability and Reliability Analysis System (SRAS), was developed to evaluate performance of the cognitive tests using three approaches for identifying stability: Graphical Analysis, Learning Curve Fitting, and Statistical Analysis. The results of the comparative evaluation indicated that the SRAS macro program was effective in determining differential stability for the various tasks and measures. Across all tasks, the use of a compound graphical analysis approach was better than a single graph method in terms of providing a more reliable estimation of task stability. Learning curves were fit to each performance measure. For most tasks, the best-fit models were power and logarithmic models. The statistical analysis methods provided conservative estimates of task stability.

A Computer‐based image analysis system for biocide screening

Biofouling ◽  
1996 ◽  
Vol 10 (1-3) ◽  
pp. 225-237 ◽  
Author(s):  
B Wigglesworth‐Cooksey ◽  
K E Cooksey
Keyword(s):  
Image Analysis ◽  
Image Analysis System ◽  
Computer Based ◽  
Analysis System

scholarly journals The Development of a Repetition-Load Scheme for the Eccentric- Only Bench Press Exercise

2013 ◽  
Vol 38 ◽  
pp. 23-31 ◽  
Author(s):  
Gavin L. Moir ◽  
Kyle F. Erny ◽  
Shala E. Davis ◽  
John J. Guers ◽  
Chad A. Witmer
Keyword(s):  
Linear Function ◽  
Bench Press ◽  
Three Dimensional ◽  
Load Condition ◽  
Vertical Force ◽  
Starting Point ◽  
Stretch Shortening Cycle ◽  
Analysis System ◽  
Repetitions To Failure

Abstract The purpose of the present study was to develop a repetition-load scheme for the eccentric-only bench press exercise. Nine resistance trained men (age: 21.6 ± 1.0 years; 1-repetition maximum [RM] bench press: 137.7 ± 30.4 kg) attended four testing sessions during a four week period. During the first session each subject’s 1-RM bench press load utilizing the stretch-shortening cycle was determined. During the remaining sessions they performed eccentric-only repetitions to failure using supra-maximal loads equivalent to 110%, 120% and 130% of their 1-RM value with a constant cadence (30 reps·min-1). Force plates and a three dimensional motion analysis system were used during these final three sessions in order to evaluate kinematic and kinetic variables. More repetitions were completed during the 110% 1-RM condition compared to the 130% 1-RM condition (p=0.01). Mean total work (p=0.046) as well as vertical force (p=0.049), vertical work (p=0.017), and vertical power output (p=0.05) were significantly greater during the 130% 1-RM condition compared to the 110% 1-RM condition. A linear function was fitted to the number of repetitions completed under each load condition that allowed the determination of the maximum number of repetitions that could be completed under other supra-maximal loads. This linear function predicted an eccentric-only 1-RM in the bench press with a load equivalent to 164.8% 1-RM, producing a load of 227.0 ± 50.0 kg. The repetition-load scheme presented here should provide a starting point for researchers to investigate the kinematic, kinetic and metabolic responses to eccentric-only bench press workouts.

scholarly journals Chest CT Images for COVID-19: Radiologists and Computer-based detection

2020 ◽  
Author(s):  
Qingli Dou ◽  
Jiangping Liu ◽  
Wenwu Zhang ◽  
Yanan Gu ◽  
Wan-Ting Hsu ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Image Analysis ◽  
Ct Images ◽  
Chest Ct ◽  
Image Analysis System ◽  
Ct Image ◽  
Chest Computed Tomography ◽  
Computer Based ◽  
Analysis System ◽  
Novel Coronavirus

ABSTRACTBackgroundCharacteristic chest computed tomography (CT) manifestation of 2019 novel coronavirus (COVID-19) was added as a diagnostic criterion in the Chinese National COVID-19 management guideline. Whether the characteristic findings of Chest CT could differentiate confirmed COVID-19 cases from other positive nucleic acid test (NAT)-negative patients has not been rigorously evaluated.PurposeWe aim to test whether chest computed tomography (CT) manifestation of 2019 novel coronavirus (COVID-19) can be differentiated by a radiologist or a computer-based CT image analysis system.MethodsWe conducted a retrospective case-control study that included 52 laboratory-confirmed COVID-19 patients and 80 non-COVID-19 viral pneumonia patients between 20 December, 2019 and 10 February, 2020. The chest CT images were evaluated by radiologists in a double blind fashion. A computer-based image analysis system (uAI system, Lianying Inc., Shanghai, China) detected the lesions in 18 lung segments defined by Boyden classification system and calculated the infected volume in each segment. The number and volume of lesions detected by radiologist and computer system was compared with Chi-square test or Mann-Whitney U test as appropriate.ResultsThe main CT manifestations of COVID-19 were multi-lobar/segmental peripheral ground-glass opacities and patchy air space infiltrates. The case and control groups were similar in demographics, comorbidity, and clinical manifestations. There was no significant difference in eight radiologist identified CT image features between the two groups of patients. There was also no difference in the absolute and relative volume of infected regions in each lung segment.ConclusionsWe documented the non-differentiating nature of initial chest CT image between COVID-19 and other viral pneumonia with suspected symptoms. Our results do not support CT findings replacing microbiological diagnosis as a critical criterion for COVID-19 diagnosis. Our findings may prompt re-evaluation of isolated patients without laboratory confirmation.

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