Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Institution
-
- Prairie View A&M University (639)
- Selected Works (458)
- Illinois State University (368)
- Taylor University (345)
- SelectedWorks (304)
-
- University of New Mexico (284)
- University of Nebraska - Lincoln (233)
- Virginia Commonwealth University (230)
- Claremont Colleges (226)
- Louisiana State University (225)
- Old Dominion University (219)
- Air Force Institute of Technology (167)
- University of Texas at El Paso (161)
- Wright State University (157)
- Wayne State University (156)
- University of Dayton (144)
- Technological University Dublin (143)
- Western University (134)
- Western Kentucky University (121)
- Portland State University (116)
- Clemson University (114)
- Embry-Riddle Aeronautical University (107)
- University of Tennessee, Knoxville (106)
- Montclair State University (105)
- Association of Arab Universities (98)
- Rose-Hulman Institute of Technology (90)
- City University of New York (CUNY) (86)
- Utah State University (76)
- COBRA (73)
- University of Nevada, Las Vegas (72)
- Keyword
-
- Mathematics (135)
- Stability (95)
- Differential equations (70)
- Epidemiology (61)
- Optimization (58)
-
- Finite element method (55)
- Machine learning (51)
- Neutrosophic logic (49)
- Mathematical modeling (47)
- Simulation (47)
- Modeling (45)
- Medicine (43)
- Generalized differentiation (42)
- Variational analysis (42)
- Machine Learning (40)
- Optimal control (38)
- Numerical analysis (36)
- Other (36)
- Solitons (36)
- Statistics (36)
- Algorithms (35)
- Applied sciences (35)
- Applied Mathematics and Computations (33)
- Mathematics and Statistics (30)
- Partial differential equations (30)
- Probability (30)
- COVID-19 (29)
- Ecology (28)
- Graph theory (28)
- Inverse problems (28)
- Publication Year
- Publication
-
- Applications and Applied Mathematics: An International Journal (AAM) (639)
- Annual Symposium on Biomathematics and Ecology Education and Research (326)
- Theses and Dissertations (276)
- Mathematics Faculty Publications (184)
- LSU Doctoral Dissertations (182)
-
- Biology and Medicine Through Mathematics Conference (177)
- Branch Mathematics and Statistics Faculty and Staff Publications (177)
- Department of Mathematics: Faculty Publications (171)
- Electronic Theses and Dissertations (139)
- Mathematics and Statistics Faculty Publications (132)
- Dissertations (122)
- Departmental Technical Reports (CS) (114)
- Electronic Thesis and Dissertation Repository (113)
- Articles (106)
- Mathematics & Statistics Faculty Publications (105)
- Doctoral Dissertations (103)
- Mathematics & Statistics ETDs (100)
- Mathematics Research Reports (93)
- Mathematics and Statistics Faculty Publications and Presentations (86)
- All HMC Faculty Publications and Research (82)
- Publications (76)
- Journal of Engineering Research (73)
- All Dissertations (71)
- Mathematical Sciences Technical Reports (MSTR) (71)
- Masters Theses (66)
- Department of Applied Mathematics and Statistics Faculty Scholarship and Creative Works (64)
- Summer Conference on Topology and Its Applications (62)
- Tian-Xiao He (60)
- Faculty Publications (56)
- Xiao-Jun Yang (56)
- Publication Type
Articles 7651 - 7680 of 7987
Full-Text Articles in Physical Sciences and Mathematics
Stability Of A Viscoelastic Burgers Flow, D. Glenn Lasseigne, W. E. Olmstead
Stability Of A Viscoelastic Burgers Flow, D. Glenn Lasseigne, W. E. Olmstead
Mathematics & Statistics Faculty Publications
The system of equations proposed by Burgers to model turbulent flow in a channel is extended to include viscoelastic affects. The stability and bifurcation properties are examined in the neighborhood of the critical Reynolds number. For highly elastic fluids, the bifurcated state is periodic with a shift in frequency.
Boundary Value Problems In Elasticity And Thermoelasticity, Stuart Davidson
Boundary Value Problems In Elasticity And Thermoelasticity, Stuart Davidson
Mathematics & Statistics Theses & Dissertations
In this dissertation the author solves a series of mixed boundary value problems arising from crack problems in elasticity and thermoelasticity. Using integral transform techniques and separation of variables appropriately, it is shown that the solutions can be found by solving a corresponding set of triple or dual integral equations in some instances, while in others the solutions of triple or dual series relations are required. These in turn reduce to various singular integral equations which are solved in closed form, in two cases, or by numerical methods. The stress intensity factors at the crack tips, the physical parameters of …
The Truncated Cauchy Distribution: Estimation Of Parameters And Application To Stock Returns, Paul G. Staneski
The Truncated Cauchy Distribution: Estimation Of Parameters And Application To Stock Returns, Paul G. Staneski
Mathematics & Statistics Theses & Dissertations
The problem addressed in this dissertation is the existence and estimation of the parameters of a truncated Cauchy distribution. It is known that when a number of distributions with infinite support are truncated to a finite interval that the maximum likelihood estimator of the scale parameter fails to exist with positive probability. In particular, necessary and sufficient conditions which give rise to instances of non-existence have been found for the exponential (Deemer and Votaw (1955)), gamma (Broeder (1955), Hegde and Dahiya (1989)), Weibull (Mittal and Dahiya (1989)) and normal distribution (Barndorff-Nielsen (1978), Mittal and Dahiya (1987), Hegde and Dahiya (1989)). …
Graphs, Maneuvers, And Turnpikes, Arthur T. Benjamin
Graphs, Maneuvers, And Turnpikes, Arthur T. Benjamin
All HMC Faculty Publications and Research
We address the problem of moving a collection of objects from one subset of Zm to another at minimum cost. We show that underfairly natural rules for movement assumptions, if the origin and destination are far enough apart, then a near optimal solution with special structure exists: Our trajectory from the originto the destination accrues almost all of its cost repeatingat most m different patterns of movement. Directions for related research are identified.
More Information About Cbdistillery Oil !, Mason James
More Information About Cbdistillery Oil !, Mason James
Mason James
On The Optimal Reward Function Of The Continuous Time Multiarmed Bandit Problem, José Luis Menaldi, Maurice Robin
On The Optimal Reward Function Of The Continuous Time Multiarmed Bandit Problem, José Luis Menaldi, Maurice Robin
Mathematics Faculty Research Publications
The optimal reward function associated with the so-called "multiarmed bandit problem" for general Markov-Feller processes is considered. It is shown that this optimal reward function has a simple expression (product form) in terms of individual stopping problems, without any smoothness properties of the optimal reward function neither for the global problem nor for the individual stopping problems. Some results relative to a related problem with switching cost are obtained.
Remarks On Estimates For The Green Function, Jose Luis Menaldi
Remarks On Estimates For The Green Function, Jose Luis Menaldi
Mathematics Faculty Research Publications
No abstract provided.
Coincidence Orientations Of Crystals In Tetragonal Systems, With Applications To Yba2cu3o7, Abha Singh, N. Chandrasekhar, Alexander H. King
Coincidence Orientations Of Crystals In Tetragonal Systems, With Applications To Yba2cu3o7, Abha Singh, N. Chandrasekhar, Alexander H. King
Alexander H. King
We have developed a method for the characterization of coincidence-site lattices (CSL's) in tetragonal or near-tetragonal orthorhombic structures, by suitable modifications to the method of Grimmer & Warrington [Acta Cryst. (1987), A43, 232-243]. We have applied our method to determine coincidence rotations and the associated information appropriate for forming constrained CSL's in the high-To superconductor YBazCu307-n. The unit cell is orthorhombic with lattice parameters a = 3.82, b = 3"89 and c = 11.67 A for the nominal composition. We present tables of coincidence rotation angles, .Z, CSL, DSCL and associated step vectors up to ,~ = 50. We find …
Asymptotic Optimality Of Experimental Designs In Estimating A Product Of Means, Kamel Rekab
Asymptotic Optimality Of Experimental Designs In Estimating A Product Of Means, Kamel Rekab
Mathematics and System Engineering Faculty Publications
In nonlinear estimation problems with linear models, one difficulty in obtaining optimal designs is their dependence on the true value of the unknown parameters. A Bayesian approach is adopted with the assumption the means are independent apriori and have conjuguate prior distributions. The problem of designing an exper- iment to estimate the product of the means of two normal populations is considered. The main results determine an asymptotic lower bound for the Bayes risk, and a necessary and sufficient condition for any sequential procedure to achieve the bound.
Existence And Uniqueness Of Solutions Of Nonlocal Problems For Hyperbolic Equation Uxt=F(X, T, U, Ux), L. Byszewski
Existence And Uniqueness Of Solutions Of Nonlocal Problems For Hyperbolic Equation Uxt=F(X, T, U, Ux), L. Byszewski
Mathematics and System Engineering Faculty Publications
The aim of the paper is to give two theorems about existence and uniqueness of continuous solutions for hyperbolic nonlinear differential problems with nonlocal conditions in bounded and unbounded domains. The results obtained in this paper can be applied in the theory of elasticity with better effect than analogous known results with classical initial conditions.
Strong Maximum Principles For Parabolic Nonlinear Problems With Nonlocal Inequalities Together With Integrals, Ludwik Byszewski
Strong Maximum Principles For Parabolic Nonlinear Problems With Nonlocal Inequalities Together With Integrals, Ludwik Byszewski
Mathematics and System Engineering Faculty Publications
In [4] and [5], the author studied strong maximum principles for nonlinear parabolic problems with initial and nonlocal inequalities, respectively. Our purpose here is to extend results in [4] and [5] to strong maximum principles for nonlinear parabolic problems with nonlocal inequalities together with integrals. The results obtained in this paper can be applied in the theories of diffusion and heat conduction, since considered here integrals in nonlocal inequalities can be interpreted as mean amounts of the diffused substance or mean temperatures of the investigated medium.
Best Quasi-Convex Uniform Approximation, S. E. Weinstein, Yuesheng Xu
Best Quasi-Convex Uniform Approximation, S. E. Weinstein, Yuesheng Xu
Mathematics & Statistics Faculty Publications
No abstract provided.
On The Lie Curvature Of Dupin Hypersurfaces, Thomas E. Cecil
On The Lie Curvature Of Dupin Hypersurfaces, Thomas E. Cecil
Mathematics and Computer Science Department Faculty Scholarship
A hypersurface M in a standard sphere Sn is said to be Dupin if each of its principal curvatures is constant along its corresponding curvature surfaces. If the number of distinct principal curvatures is constant, then M is called a proper Dupin hypersurface. There is a close relationship between the class of compact proper Dupin hypersurfaces and the class of isoparametric hypersurfaces. Miinzner [11] showed that the number g of distinct principal curvatures of an isoparametric hypersurface must be 1, 2, 3, 4 or 6. Thorbergsson [15] then showed that the same restriction holds for a compact proper Dupin …
Bivariate C1 Quadratic Finite Elements And Vertex Splines, Tian-Xiao He
Bivariate C1 Quadratic Finite Elements And Vertex Splines, Tian-Xiao He
Scholarship
No abstract provided.
A Characterization Of The Solution Of A Fredholm Integral Equation With L∞ Forcing Term, Hideaki Kaneko, Richard Noren, Yuesheng Xu
A Characterization Of The Solution Of A Fredholm Integral Equation With L∞ Forcing Term, Hideaki Kaneko, Richard Noren, Yuesheng Xu
Mathematics & Statistics Faculty Publications
In this paper we investigate the regularity properties of the Fredholm equation (Formula Presented) . The kernel is the product of the smooth function k and the singular function gα (Formula Presented). The forcing function f is in L∞. We obtain a decomposition of the solution as the sum of two functions—one with a discontinuity reflecting that of the forcing function—and the other a regular function. Our results extend those of C. Schneider [6], who assumes a condition that is stronger than f ∈ C[a, b] ∩ Cm(a,b) (for some integer m). © 1990 …
Wings And Perfect Graphs, Stephan Olariu
Wings And Perfect Graphs, Stephan Olariu
Computer Science Faculty Publications
An edge uv of a graph G is called a wing if there exists a chordless path with vertices u, v, x, y and edges uv, vx, xy. The wing-graph W(G) of a graph G is a graph having the same vertex set as G; uv is an edge in W(G) if and only if uv is a wing in G. A graph G is saturated if G is isomorphic to W(G). A star-cutset in a graph G is a non-empty set of …
A Generalization Of Linear Multistep Methods, Leon Arriola
A Generalization Of Linear Multistep Methods, Leon Arriola
Mathematics & Statistics Theses & Dissertations
A generalization of the methods that are currently available to solve systems of ordinary differential equations is made. This generalization is made by constructing linear multistep methods from an arbitrary set of monotone interpolating and approximating functions. Local truncation error estimates as well as stability analysis is given. Specifically, the class of linear multistep methods of the Adams and BDF type are discussed.
Management Information Sources And Corporate Intelligence Systems, Robert F. Gordon Ph.D.
Management Information Sources And Corporate Intelligence Systems, Robert F. Gordon Ph.D.
Faculty Works: MCS (1984-2023)
In this book the word “intelligence” is used in several different contexts. Intelligence can refer to the process of gathering data; it can refer to the data itself; and it can refer to the application of knowledge to product useful information from the data. We will see in this chapter how the computer can be used in business to further all three aspects of intelligence: capturing the data, storing the data in an accessible form, and adding value to the data by transforming it into useful information for decision making. This chapter is organized according to these three areas of …
Bivariate C1 Quadratic Finite Elements And Vertex Splines, Tian-Xiao He
Bivariate C1 Quadratic Finite Elements And Vertex Splines, Tian-Xiao He
Tian-Xiao He
No abstract provided.
Spectral Evolution Of A One-Parameter Extension Of A Real Symmetric Toeplitz Matrix, William F. Trench
Spectral Evolution Of A One-Parameter Extension Of A Real Symmetric Toeplitz Matrix, William F. Trench
William F. Trench
No abstract provided.
A Note On A Toeplitz Inversion Formula, William F. Trench
A Note On A Toeplitz Inversion Formula, William F. Trench
William F. Trench
No abstract provided.
Spatial Critical Points Of Solutions Of A One-Dimensional Nonlinear Parabolic Problem, Larry Turyn
Spatial Critical Points Of Solutions Of A One-Dimensional Nonlinear Parabolic Problem, Larry Turyn
Mathematics and Statistics Faculty Publications
The number of spatial critical points is nonincreasing in time, for positive, analytic solutions of a scalar, nonlinear, parabolic partial differential equation in one space dimension. While proving this, we answer the question: What happens to a critical point which loses simplicity?
The Chromatic Sum And Efficient Tree Algorithms, Ewa Kubicka
The Chromatic Sum And Efficient Tree Algorithms, Ewa Kubicka
Dissertations
In Chapter I this concept is introduced. It is shown that computing the chromatic sum is NP-complete. For every natural k the smallest tree which needs k colors to attain its chromatic sum is constructed. It is demonstrated that asymptotically, for each k, almost all trees require more than k colors to achieve their chromatic sums. Also a linear algorithm for a single tree is presented.
In Chapter II three constructions of graphs that require t colors beyond their chromatic number k to achieve their chromatic sum are presented, depending on the ratio ${\rm t}\over{\rm k}$. The order of the …
Measures Of Partial Association Based On Rank Estimates, Sudhakar H. Rao
Measures Of Partial Association Based On Rank Estimates, Sudhakar H. Rao
Dissertations
No abstract provided.
Greatest Common Subgraphs, Grzegorz Kubicki
Nonnegative Solutions For A Class Of Radially Symmetric Nonpositone Problems, Alfonso Castro, Ratnasingham Shivaji
Nonnegative Solutions For A Class Of Radially Symmetric Nonpositone Problems, Alfonso Castro, Ratnasingham Shivaji
All HMC Faculty Publications and Research
We consider the existence of radially symmetric non-negative solutions for the boundary value problem
\begin{displaymath}\begin{array}{*{20}{c}} { - \Delta u(x) = \lambda f(u(x))\qua... ...\\ {u(x) = 0\quad \left\Vert x \right\Vert = 1} \\ \end{array} \end{displaymath}
where $ \lambda > 0,f(0) < 0$ (non-positone), $ f' \geq 0$ and $ f$ is superlinear. We establish existence of non-negative solutions for $ \lambda $ small which extends some work of our previous paper on non-positone problems, where we considered the case $ N = 1$. Our work also proves a recent conjecture by Joel Smoller and Arthur Wasserman.
On The Dimension Of Bivariate Superspline Spaces, Tian-Xiao He
On The Dimension Of Bivariate Superspline Spaces, Tian-Xiao He
Scholarship
A bivariate piecewise polynomial function of total degree d on some grid partition △ that has rth order continuous partial derivatives everywhere may have higher-order partial derivatives at the vertices of the grid partition. In finite element considerations and in the construction of vertex splines, it happens that only those functions with continuous partial derivatives of order higher than r at the vertices are needed to give the same full approximation order as the entire space of piecewise polynomials. This is certainly the case for d > 4r + 1. Such piecewise polynomial functions are called supersplines. This paper is devoted …
Mathematical Models Of Prevascular Tumor Growth By Diffusion, Sophia A. Maggelakis
Mathematical Models Of Prevascular Tumor Growth By Diffusion, Sophia A. Maggelakis
Mathematics & Statistics Theses & Dissertations
A study of several complementary mathematical models that describe the early, prevascular stages of solid tumor growth by diffusion under various simplifying assumptions is presented. The advantage of these models is that their degree of complexity is relatively low, which ensures fairly straightforward comparisons with experimental or clinical data (as it becomes available), yet they are mathematically sophisticated enough to capture the main biological phenomena of interest.
The tumor growth and cell proliferation rate are assumed to depend on the local concentrations of nutrients and inhibitory factors. The effects of geometry and spatially non-uniform inhibitor production and non-uniform nutrient consumption …
On The Dimension Of Bivariate Superspline Spaces, Tian-Xiao He
On The Dimension Of Bivariate Superspline Spaces, Tian-Xiao He
Tian-Xiao He
A bivariate piecewise polynomial function of total degree d on some grid partition △ that has rth order continuous partial derivatives everywhere may have higher-order partial derivatives at the vertices of the grid partition. In finite element considerations and in the construction of vertex splines, it happens that only those functions with continuous partial derivatives of order higher than r at the vertices are needed to give the same full approximation order as the entire space of piecewise polynomials. This is certainly the case for d > 4r + 1. Such piecewise polynomial functions are called supersplines. This …
Beauty In Mathematics: Some Theological Implications, David L. Neuhouser
Beauty In Mathematics: Some Theological Implications, David L. Neuhouser
ACMS Conference Proceedings 1989
It may come as a surprise to some that science or mathematics could be considered beautiful, but many prominent sciences and mathematicians from around the world have made such claims. Furthermore, the beauty of mathematics and order of the universe inspired some of the greatest developments in science and mathematics. This paper examines the beauty of mathematics and what scientists and other individuals have said about the subject.