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1985

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Articles 1081 - 1091 of 1091

Full-Text Articles in Physical Sciences and Mathematics

Viscosity Measurements In Dilute Helium-3-Helium-4 Mixtures, George Schmiedeshoff Dec 1984

Viscosity Measurements In Dilute Helium-3-Helium-4 Mixtures, George Schmiedeshoff

George Schmiedeshoff

We have measured the viscosity of a dilute mixture of 3He in 4He at temperatures from 5 to 100 mK and in magnetic fields of 0.35, 2.01 and 8.76 T using a vibrating wire viscometer. Subject to our choice of calibration function, the data at 0.35 T is in good agreement with theory. Due to an interaction of our viscometer with the magnetic field the motion of the wire at 2.01 and 8.76 T is not understood; however, the 2.01 T data can be brought into agreement with the 0.35 T data by adjusting a geometrical constant. An increase in …


Quantitative Evaluation Of Enhancement Techniques, B. L. Deekshatulu, Arun D. Kulkarni, G. Kashipati Rao Dec 1984

Quantitative Evaluation Of Enhancement Techniques, B. L. Deekshatulu, Arun D. Kulkarni, G. Kashipati Rao

Arun Kulkarni

Enhancement techniques are often used in image processing. In this paper, a quantitative measure of the image quality through evaluation of the coefficient of information content and the entropy has been suggested to evaluate the effect of enhancement. The image has been assumed to be a sample function of a homogeneous random field and the pixel values are estimated from the ‘past’ pixel values. The difference between the estimated value and the actual value of the pixel has been used as the criterion for defining the coefficient of information content. Also, the entropy obtained using the co-occurrance matrix of the …


Existence Of Global Solutions With Prescribed Asymptotic Behavior For Nonlinear Differential Equations, William F. Trench Dec 1984

Existence Of Global Solutions With Prescribed Asymptotic Behavior For Nonlinear Differential Equations, William F. Trench

William F. Trench

No abstract provided.


On The Eigenvalue Problem For Toeplitz Matrices Generated By Rational Functions, William F. Trench Dec 1984

On The Eigenvalue Problem For Toeplitz Matrices Generated By Rational Functions, William F. Trench

William F. Trench

We give formulas for the characteristic polynomial and eigenvectors of of $n\times n$ Toeplitz matrices generated by a formal Laurent series of a rational function $R(z)$. The formulas are in terms of a certain fixed polynomial with coefficients that are simple functions of $\lambda$ and the coefficients of $R(z)$. The complexity of the formulas is independent of $n$.


Cognitive Coordinate Systems: Accounts Of Mental Rotation And Individual Differences In Spatial Ability, Marcel Adam Just, Patricia A. Carpenter Dec 1984

Cognitive Coordinate Systems: Accounts Of Mental Rotation And Individual Differences In Spatial Ability, Marcel Adam Just, Patricia A. Carpenter

Marcel Adam Just

No abstract provided.


Functional Perturbations Of Second Order Differential Equations, William F. Trench Dec 1984

Functional Perturbations Of Second Order Differential Equations, William F. Trench

William F. Trench

No abstract provided.


Explicit Inversion Formulas For Toeplitz Band Matrices, William F. Trench Dec 1984

Explicit Inversion Formulas For Toeplitz Band Matrices, William F. Trench

William F. Trench

No abstract provided.


Linear Perturbations Of General Disconjugate Equations, William F. Trench Dec 1984

Linear Perturbations Of General Disconjugate Equations, William F. Trench

William F. Trench

No abstract provided.


Eventual Disconjugacy Of A Linear Differential Equation Ii, William F. Trench Dec 1984

Eventual Disconjugacy Of A Linear Differential Equation Ii, William F. Trench

William F. Trench

No abstract provided.


On $T_\Infty$ Quasi-Similarity Of Linear Systems, William F. Trench Dec 1984

On $T_\Infty$ Quasi-Similarity Of Linear Systems, William F. Trench

William F. Trench

No abstract provided.


On The Eigenvalue Problem For Toeplitz Band Matrices, William F. Trench Dec 1984

On The Eigenvalue Problem For Toeplitz Band Matrices, William F. Trench

William F. Trench

No abstract provided.