Results 311 to 320 of about 1,105,625 (354)
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BIT, 1993
This article investigates the performance of (explicit) one-step methods applied to stiff linear differential equations. The effects of ``freezing'' the coefficients and of diagonalizing the matrix is studied. By a series of interesting numerical experiments, it is shown that the scalar test equation \(y' = \lambda y\) does not correctly explain the ...
Desmond J. Higham +2 more
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This article investigates the performance of (explicit) one-step methods applied to stiff linear differential equations. The effects of ``freezing'' the coefficients and of diagonalizing the matrix is studied. By a series of interesting numerical experiments, it is shown that the scalar test equation \(y' = \lambda y\) does not correctly explain the ...
Desmond J. Higham +2 more
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On the stiffness and stiffness control of redundant manipulators
Proceedings 2002 IEEE International Conference on Robotics and Automation (Cat. No.02CH37292), 2003An analysis of the stiffness of redundant manipulators is undertaken in this paper. First, the matrix of the force-dependent stiffness is derived and its basic properties are analyzed. In particular, in the planar case the stability conditions for the force dependent stiffness (and gravity-dependent stiffness) are obtained in the analytical form. Next,
Z.W. Luo +3 more
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Journal of Hypertension, 1999
Arterial stiffness is an important determinant of pulse pressure, and of left ventricular load and coronary perfusion pressure.Precise quantification is elusive, since stiffness is different in different arteries and even in the same artery at different pressures.
M F, O'Rourke, G, Mancia
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Arterial stiffness is an important determinant of pulse pressure, and of left ventricular load and coronary perfusion pressure.Precise quantification is elusive, since stiffness is different in different arteries and even in the same artery at different pressures.
M F, O'Rourke, G, Mancia
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Hand Clinics, 2010
The stiff finger is a frequently encountered entity in hand surgical practice. It stems from a myriad of causes, may have multiple components, and requires a variety of solutions. A true understanding of the ideal treatments for the stiff finger requires a basic understanding of the local milieu that arises from injury and the anatomic features that ...
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The stiff finger is a frequently encountered entity in hand surgical practice. It stems from a myriad of causes, may have multiple components, and requires a variety of solutions. A true understanding of the ideal treatments for the stiff finger requires a basic understanding of the local milieu that arises from injury and the anatomic features that ...
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Arthroscopy: The Journal of Arthroscopic & Related Surgery, 2008
Shoulder stiffness is commonly encountered in clinical practice but varies greatly in severity and etiology. Loss of shoulder range of motion can be a patient's primary complaint or may be a secondary finding. Possible causes of stiffness include guarding due to pain or secondary gain issues (nonanatomic), true mechanical blockage due to acute or ...
Joseph C, Tauro, Melyssa, Paulson
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Shoulder stiffness is commonly encountered in clinical practice but varies greatly in severity and etiology. Loss of shoulder range of motion can be a patient's primary complaint or may be a secondary finding. Possible causes of stiffness include guarding due to pain or secondary gain issues (nonanatomic), true mechanical blockage due to acute or ...
Joseph C, Tauro, Melyssa, Paulson
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Leg Stiffness and Quasi-Stiffness
2019Human locomotion is similar to the motion of a bouncing ball. Therefore, the term “bouncing gait” has been used to describe locomotion in which the lower limbs perform the role of “springs” responsible for the movement of the general centre of mass. “Spring-mass model” is used to describe a bouncing gait and contains a material point that represents a ...
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Algebra Universalis, 1995
The article is concerned with the consistency of the existence of atomic Boolean algebras which are close to rigid. A BA is Hopfian if every onto endomorphism is 1-1; dual Hopfian if every 1-1 endomorphism is onto; almost rigd if no automorphism moves infinitely many atoms; stiff if it satisfies all of these properties; tree-like if mod finite it is a ...
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The article is concerned with the consistency of the existence of atomic Boolean algebras which are close to rigid. A BA is Hopfian if every onto endomorphism is 1-1; dual Hopfian if every 1-1 endomorphism is onto; almost rigd if no automorphism moves infinitely many atoms; stiff if it satisfies all of these properties; tree-like if mod finite it is a ...
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Applied Numerical Mathematics, 1985
The author presents a way of refinement of traditional measures of stiffness for the initial value problem (*) \(y'(x)=f(x,y(x))\), \(x\in [a,b]\), y(a) is given, where \(y(x)\in {\mathbb{R}}^ n\). The measure of stiffness introduced is more precise and easier to evaluate numerically.
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The author presents a way of refinement of traditional measures of stiffness for the initial value problem (*) \(y'(x)=f(x,y(x))\), \(x\in [a,b]\), y(a) is given, where \(y(x)\in {\mathbb{R}}^ n\). The measure of stiffness introduced is more precise and easier to evaluate numerically.
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Stiffness‐Adaptive Taylor method for the integration of non‐stiff and stiff kinetic models
Journal of Computational Chemistry, 1992AbstractA systematic derivation procedure that greatly facilitates the application of the Taylor method to the integration of kinetic models is developed. In addition, an algorithm that gives the integration step as a function of the required level of accuracy is proposed.
J. J. Baeza Baeza +2 more
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STIFF PERSON SYNDROME PRESENTING AS ‘STIFF EYES’
Journal of Neurology, Neurosurgery & Psychiatry, 2015A 47-year previously fit and well lady presented with 6 weeks history of generalised lethargy, weight loss and neck pain. Her examination revealed left supra-clavicular lymph nodes. Subsequent investigations revealed left grade 2 invasive ductal carcinoma of her left breast.
Priya Shanmugarajan +2 more
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