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Articles 1561 - 1590 of 1925

Full-Text Articles in Mathematics

Dynamics Of A Stochastic Predator-Prey Model With The Beddington-Deangelis Functional Response, Ta Viet Ton, Atsushi Yagi Jun 2011

Dynamics Of A Stochastic Predator-Prey Model With The Beddington-Deangelis Functional Response, Ta Viet Ton, Atsushi Yagi

Communications on Stochastic Analysis

No abstract provided.


Evolution Systems Of Measures For Non-Autonomous Ornstein-Uhlenbeck Processes With Lévy Noise, Robert Wooster Jun 2011

Evolution Systems Of Measures For Non-Autonomous Ornstein-Uhlenbeck Processes With Lévy Noise, Robert Wooster

Communications on Stochastic Analysis

No abstract provided.


Characterization Of Mass-Stationarity By Bernoulli And Cox Transports, Günter Last, Hermann Thorisson Jun 2011

Characterization Of Mass-Stationarity By Bernoulli And Cox Transports, Günter Last, Hermann Thorisson

Communications on Stochastic Analysis

No abstract provided.


A General Theorem For Portfolio Generating Functions, Olivier Menoukeu Pamen Jun 2011

A General Theorem For Portfolio Generating Functions, Olivier Menoukeu Pamen

Communications on Stochastic Analysis

No abstract provided.


Stochastic Jacobians In Affine Term-Structure Models: A Local Property, Cody Blaine Hyndman Jun 2011

Stochastic Jacobians In Affine Term-Structure Models: A Local Property, Cody Blaine Hyndman

Communications on Stochastic Analysis

No abstract provided.


Stability And Change In Self-Reported Sexual Orientation Identity In Young People: Application Of Mobility Metrics, Miles Q. Ott, Heather L. Corliss, David Wypij, Margaret Rosario, S. Bryn Austin Jun 2011

Stability And Change In Self-Reported Sexual Orientation Identity In Young People: Application Of Mobility Metrics, Miles Q. Ott, Heather L. Corliss, David Wypij, Margaret Rosario, S. Bryn Austin

Statistical and Data Sciences: Faculty Publications

This study investigated stability and change in self-reported sexual orientation identity over time in youth. We describe gender- and age-related changes in sexual orientation identity from early adolescence through emerging adulthood in 13,840 youth ages 12–25 employing mobility measure M, a measure we modified from its original application for econometrics. Using prospective data from a large, ongoing cohort of U.S. adolescents, we examined mobility in sexual orientation identity in youth with up to four waves of data. Ten percent of males and 20% of females at some point described themselves as a sexual minority, while 2% of both males and …


Set: The Probabilities And Possibilities, Tabitha K. Bollinger May 2011

Set: The Probabilities And Possibilities, Tabitha K. Bollinger

Undergraduate Theses and Capstone Projects

The card game SET involves finding groups o f three cards called SETs. Choices are based upon the individual card characteristics, including shape, pattern, number, and color. Previously, the maximum number o f cards that can be played without creating a SET has been determined as 20 cards by extensive computer work. This report further explored the probabilities and possibilities o f the game. Using discrete mathematics and probability, we explored how many SETs are possible and what strategies led to the most points. Additionally, this project exercised undergraduate logic and reasoning to generalize the results in order to be …


Group Actions And Divisors On Tropical Curves, Max B. Kutler May 2011

Group Actions And Divisors On Tropical Curves, Max B. Kutler

HMC Senior Theses

Tropical geometry is algebraic geometry over the tropical semiring, or min-plus algebra. In this thesis, I discuss the basic geometry of plane tropical curves. By introducing the notion of abstract tropical curves, I am able to pass to a more abstract metric-topological setting. In this setting, I discuss divisors on tropical curves. I begin a study of $G$-invariant divisors and divisor classes.


Verification Of Solutions To The Sensor Location Problem, Chandler May May 2011

Verification Of Solutions To The Sensor Location Problem, Chandler May

HMC Senior Theses

Traffic congestion is a serious problem with large economic and environmental impacts. To reduce congestion (as a city planner) or simply to avoid congested channels (as a road user), one might like to accurately know the flow on roads in the traffic network. This information can be obtained from traffic sensors, devices that can be installed on roads or intersections to measure traffic flow. The sensor location problem is the problem of efficiently locating traffic sensors on intersections such that the flow on the entire network can be extrapolated from the readings of those sensors. I build on current research …


Results In Lattices, Ortholattices, And Graphs, Jianning Su Apr 2011

Results In Lattices, Ortholattices, And Graphs, Jianning Su

Doctoral Dissertations

This dissertation contains two parts: lattice theory and graph theory. In the lattice theory part, we have two main subjects. First, the class of all distributive lattices is one of the most familiar classes of lattices. We introduce "π-versions" of five familiar equivalent conditions for distributivity by applying the various conditions to 3-element antichains only. We prove that they are inequivalent concepts, and characterize them via exclusion systems. A lattice L satisfies D0π, if a ✶ (b ✶ c) ≤ (a ✶ b) ✶ c for all 3-element antichains { a, b, c}. We consider …


Age-Gaps In Sexual Partnerships: Seeing Beyond ‘Sugar Daddies’, Miles Q. Ott, Till Bärnighausen, Frank Tanser, Mark N. Lurie, Marie-Louise Newell Mar 2011

Age-Gaps In Sexual Partnerships: Seeing Beyond ‘Sugar Daddies’, Miles Q. Ott, Till Bärnighausen, Frank Tanser, Mark N. Lurie, Marie-Louise Newell

Statistical and Data Sciences: Faculty Publications

We examine for the first time age-mixing in sexual relationships in a population with very high HIV incidence and prevalence in rural South Africa. The highest levels of age assortativity (the pairing of like with like) were casual partnerships reported by men, the lowest levels were spousal relationships reported by women. Given the age–sex distribution of HIV prevalence in this population, interventions to decrease age-gaps in spousal relationships may be effective in reducing HIV incidence.


Three Channel Polarimetric Based Data Deconvolution, Kurtis G. Engelson Mar 2011

Three Channel Polarimetric Based Data Deconvolution, Kurtis G. Engelson

Theses and Dissertations

A three channel polarimetric deconvolution algorithm was developed to mitigate the degrading effects of atmospheric turbulence in astronomical imagery. Tests were executed using both simulation and laboratory data. The resulting efficacy of the three channel algorithm was compared to a recently developed two channel approach under identical conditions ensuring a fair comparison amongst both algorithms. Two types of simulations were performed. The first was a binary star simulation to compare resulting resolutions between the three and two channel algorithms. The second simulation measured how effective both algorithms could deconvolve a blurred satellite image. The simulation environment assumed the key parameters …


Comparison Of Development Test And Evaluation And Overall Program Estimate At Completion, William R. Rosado Mar 2011

Comparison Of Development Test And Evaluation And Overall Program Estimate At Completion, William R. Rosado

Theses and Dissertations

Historically, cost growth regression models analyze aggregate, program-level information. Initiatives by the Office of Secretary of Defense, Cost Assessment and Program Evaluation (OSD CAPE) require direct, centralized reporting of the complete Work Breakdown Structure (WBS) Earned Value (EV) data. Centralized reporting allows access to unfiltered, unaltered, EV data for multiple programs. Using regression, we evaluate if WBS element Development Test and Evaluation (DT&E) EV data is related to program estimate at completion (EAC). Identifying a relationship provides evidence validating pertinence and reliability of low level EV data. Additionally, a relationship between a specific WBS element and program EAC establishes a …


On Zeros And Local Infima Of Brownian Motion, Michel Weber Mar 2011

On Zeros And Local Infima Of Brownian Motion, Michel Weber

Communications on Stochastic Analysis

No abstract provided.


Packing Dimension Results For Anisotropic Gaussian Random Fields, Anne Estrade, Dongsheng Wu, Yimin Xiao Mar 2011

Packing Dimension Results For Anisotropic Gaussian Random Fields, Anne Estrade, Dongsheng Wu, Yimin Xiao

Communications on Stochastic Analysis

No abstract provided.


Permanental Processes, Hana Kogan, Michael B Marcus, Jay Rosen Mar 2011

Permanental Processes, Hana Kogan, Michael B Marcus, Jay Rosen

Communications on Stochastic Analysis

No abstract provided.


Efficient Estimation Of Spectral Functionals For Gaussian Stationary Models, Mamikon S Ginovyan Mar 2011

Efficient Estimation Of Spectral Functionals For Gaussian Stationary Models, Mamikon S Ginovyan

Communications on Stochastic Analysis

No abstract provided.


On Fractional Ornstein-Uhlenbeck Processes, Terhi Kaarakka, Paavo Salminen Mar 2011

On Fractional Ornstein-Uhlenbeck Processes, Terhi Kaarakka, Paavo Salminen

Communications on Stochastic Analysis

No abstract provided.


Itô'S Formula For A Sub-Fractional Brownian Motion, Litan Yan, Guangjun Shen, Kun He Mar 2011

Itô'S Formula For A Sub-Fractional Brownian Motion, Litan Yan, Guangjun Shen, Kun He

Communications on Stochastic Analysis

No abstract provided.


Self-Similarity Parameter Estimation And Reproduction Property For Non-Gaussian Hermite Processes, Alexandra Chronopoulou, Ciprian A Tudor, Frederi G Viens Mar 2011

Self-Similarity Parameter Estimation And Reproduction Property For Non-Gaussian Hermite Processes, Alexandra Chronopoulou, Ciprian A Tudor, Frederi G Viens

Communications on Stochastic Analysis

No abstract provided.


The Long-Range Dependence Of Linear Log-Fractional Stable Motion, Joshua B Levy, Murad S Taqqu Mar 2011

The Long-Range Dependence Of Linear Log-Fractional Stable Motion, Joshua B Levy, Murad S Taqqu

Communications on Stochastic Analysis

No abstract provided.


A Review Of Some Methods To Estimate The Tail Of The Distribution Of The Maximum Of A Gaussian Field, Mario Wschebor Mar 2011

A Review Of Some Methods To Estimate The Tail Of The Distribution Of The Maximum Of A Gaussian Field, Mario Wschebor

Communications on Stochastic Analysis

No abstract provided.


A Model Of Continuous Time Polymer On The Lattice, David Márquez-Carreras, Carles Rovira, Samy Tindel Mar 2011

A Model Of Continuous Time Polymer On The Lattice, David Márquez-Carreras, Carles Rovira, Samy Tindel

Communications on Stochastic Analysis

No abstract provided.


On Local Times Of Anisotropic Gaussian Random Fields, Dongsheng Wu, Yimin Xiao Mar 2011

On Local Times Of Anisotropic Gaussian Random Fields, Dongsheng Wu, Yimin Xiao

Communications on Stochastic Analysis

No abstract provided.


Undamped Harmonic Oscillator Driven By Additive Gaussian White Noise: A Statistical Analysis, N Lin, S V Lototsky Mar 2011

Undamped Harmonic Oscillator Driven By Additive Gaussian White Noise: A Statistical Analysis, N Lin, S V Lototsky

Communications on Stochastic Analysis

No abstract provided.


Preface Mar 2011

Preface

Communications on Stochastic Analysis

No abstract provided.


Two Triangles With The Same Orthocenter And A Vectorial Proof Of Stevanovic's Theorem, Florentin Smarandache, Ion Patrascu Mar 2011

Two Triangles With The Same Orthocenter And A Vectorial Proof Of Stevanovic's Theorem, Florentin Smarandache, Ion Patrascu

Branch Mathematics and Statistics Faculty and Staff Publications

In this article we'll emphasize on two triangles...


Curd, Spencer, 1788-1832 (Sc 966), Manuscripts & Folklife Archives Feb 2011

Curd, Spencer, 1788-1832 (Sc 966), Manuscripts & Folklife Archives

Manuscript Collection Finding Aids

Finding aid and full text (click on "Additional Files" below) for Manuscripts Small Collection 966. Ciphering book (94 p.), focusing chiefly on surveying and navigating rules for solving problems as well as giving specific problems, of Spencer Curd, Logan County, Kentucky, with accompanying genealogical data.


Solutions To Dynamic Equations On Varying Times Scales, Sher B. Chhetri Jan 2011

Solutions To Dynamic Equations On Varying Times Scales, Sher B. Chhetri

Theses, Dissertations and Capstones

Note: The mathematical symbols could not be represented. See the abstract in the thesis for complete text.


Towards Nominal Formal Languages, Alexander Kurz, Tomoyuki Suzuki, Emilio Tuosto Jan 2011

Towards Nominal Formal Languages, Alexander Kurz, Tomoyuki Suzuki, Emilio Tuosto

Engineering Faculty Articles and Research

We introduce formal languages over infinite alphabets where words may contain binders.We define the notions of nominal language, nominal monoid, and nominal regular expressions. Moreover, we extend history-dependent automata (HD-automata) by adding stack, and study the recognisability of nominal languages.