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Dynamic Testing (dynamic + testing)

Distribution by Scientific Domains

Medical Sciences	50%

Selected Abstracts

Executive Summary: The International Consultation on Incontinence 2008,Committee on: "Dynamic Testing"; for urinary incontinence and for fecal incontinence. part 1: Innovations in Urodynamic Techniques and Urodynamic Testing for signs and symptoms of urinary incontinence in female patients,,

NEUROUROLOGY AND URODYNAMICS, Issue 1 2010
Peter F.W.M. Rosier
Abstract Aims The members of The International Consultation on Incontinence 2008 (Paris) Committee on Dynamic Testing' provide an executive summary of the chapter ,Dynamic Testing' that discusses (urodynamic) testing methods for patients with signs and or symptoms of urinary incontinence. Testing of patients with signs and or symptoms of faecal incontinence is also discussed. Methods Evidence based and consensus committee report. Results The chapter ,Dynamic Testing' is a continuation of previous Consultation-reports added with a new systematic literature search and expert discussion. Conclusions, based on the published evidence and recommendations, based on the integration of evidence with expert experience and discussion are provided separately, for transparency. Conclusion This first part of a series of three articles summarizes the committees recommendations about the innovations in urodynamic study techniques ,in general', about the test characteristics and normal values of urodynamic studies as well as the assessment of female with signs and or symptoms of incontinence and includes only the most recent and relevant literature references. Neurourol. Urodynam. 29: 140,145, 2010. © 2009 Wiley-Liss, Inc. [source]

Real-time hybrid testing using the unconditionally stable explicit CR integration algorithm

EARTHQUAKE ENGINEERING AND STRUCTURAL DYNAMICS, Issue 1 2009
Cheng Chen
Abstract Real-time hybrid testing combines experimental testing and numerical simulation, and provides a viable alternative for the dynamic testing of structural systems. An integration algorithm is used in real-time hybrid testing to compute the structural response based on feedback restoring forces from experimental and analytical substructures. Explicit integration algorithms are usually preferred over implicit algorithms as they do not require iteration and are therefore computationally efficient. The time step size for explicit integration algorithms, which are typically conditionally stable, can be extremely small in order to avoid numerical stability when the number of degree-of-freedom of the structure becomes large. This paper presents the implementation and application of a newly developed unconditionally stable explicit integration algorithm for real-time hybrid testing. The development of the integration algorithm is briefly reviewed. An extrapolation procedure is introduced in the implementation of the algorithm for real-time testing to ensure the continuous movement of the servo-hydraulic actuator. The stability of the implemented integration algorithm is investigated using control theory. Real-time hybrid test results of single-degree-of-freedom and multi-degree-of-freedom structures with a passive elastomeric damper subjected to earthquake ground motion are presented. The explicit integration algorithm is shown to enable the exceptional real-time hybrid test results to be achieved. Copyright © 2008 John Wiley & Sons, Ltd. [source]

Sonographic evaluation of the normal hypothenar compartment musculature

JOURNAL OF CLINICAL ULTRASOUND, Issue 8 2001
Wolfgang Grechenig MD
Abstract Purpose We propose a standardized sonographic examination technique to evaluate the muscles of the hypothenar region and describe their normal sonographic appearance. Methods The hypothenar region was studied with sonography in 20 healthy volunteers using 5,12-MHz linear-array transducers. The assessment included dynamic testing. Results All hypothenar muscles could be identified in all subjects and their courses followed entirely. In addition, their function could be assessed by scanning during active and passive movements. Conclusions Knowledge of the normal sonographic anatomy of the hypothenar region is essential for evaluation of pathologic conditions. © 2001 John Wiley & Sons, Inc. J Clin Ultrasound 29:441,448, 2001. [source]

Contribution of Cellular Structure to the Large and Small Deformation Rheological Behavior of Kiwifruit

JOURNAL OF FOOD SCIENCE, Issue 6 2002
A.M. Rojas
ABSTRACT: The relative contribution of turgor pressure, cell wall and middle lamellae to the rheology of kiwifruit was studied by performing large deformation assays and using an empirical model proposed by our group. Results were compared with those obtained previously through dynamic testing. Initial (,0) and residual relaxation (,,) stresses determined under 14% constant deformation correlated significantly with complex moduli (G*) and they allowed to detect incipient plasmolysis but not to determine the individual contributions of cell wall and middle lamellae to tissue elasticity. Firmness (Fm) showed no correlation with G* because measurement of failure stress required tissue damage but it was affected by ripening allowing to determine the individual contributions of cell wall and middle lamellae to its value. [source]

Application of a Depth Sensing Indentation Hardness Test to Evaluate the Mechanical Properties of Food Materials

JOURNAL OF FOOD SCIENCE, Issue 5 2002
N. ÖZkan
ABSTRACT: A depth sensing indentation hardness test with an associated analysis is described as a convenient and simple technique for characterizing mechanical properties of food materials, such as hardness (H), elastic modulus (E), and an elasticity index (IE), which represents the ratio of elastic to total deformation. Storage modulus (G,) and loss tangent (tan§) of the selected model food material, a whey protein concentrate (WPC) gel, have also been determined using an oscillatory dynamic testing. Fractal dimension (D) and strain rate (or frequency) exponent (n) of the WPC gels were determined using both the indentation and dynamic test results. A good correlation between the results from the indentation and the dynamic tests was established. The effects of protein concentration, deformation rate, and chemical treatment on the mechanical properties of the WPC gels were clearly illustrated using the indentation test. [source]