Digital Commons Network^™

Can Transportation Researchers Reuse Project Datasets And Programs?, Tyler Hayes, Lois Delcambre, Leonard Shapiro

Computer Science Faculty Publications and Presentations

Data users involved in research and analysis typically invest a lot of eort cleaning and manipu- lating their data as they work. Based on this observation, we have investigated two hypotheses: 1) reuse of datasets and procedures is difficult, and 2) the inability to reuse datasets and procedures is primarily due to a lack of documentation. To test these hypotheses we conducted structured interviews with data users asking questions regarding the struggles in their work pertaining to data, their documentation habits, and the importance of documentation. The interviews revealed that the data users rarely reused data or procedures, frequently encountered …

Advocacy Revalued, Geoffrey C. Hazard, Jr., Dana A. Remus

Faculty Scholarship

No abstract provided.

Polynomial Extension Operators. Part Iii, Leszek Demkowicz, Jay Gopalakrishnan, Joachim Schöberl

Mathematics and Statistics Faculty Publications and Presentations

In this concluding part of a series of papers on tetrahedral polynomial extension operators, the existence of a polynomial extension operator in the Sobolev space H(div) is proven constructively. Specifically, on any tetrahedron K, given a function w on the boundary ∂K that is a polynomial on each face, the extension operator applied to w gives a vector function whose components are polynomials of at most the same degree in the tetrahedron. The vector function is an extension in the sense that the trace of its normal component on the boundary ∂K coincides with w. Furthermore, the extension operator is …

Commuting Smoothed Projectors In Weighted Norms With An Application To Axisymmetric Maxwell Equations, Jay Gopalakrishnan, Minah Oh

Mathematics and Statistics Faculty Publications and Presentations

We construct finite element projectors that can be applied to functions with low regularity. These projectors are continuous in a weighted norm arising naturally when modeling devices with axial symmetry. They have important commuting diagram properties needed for finite element analysis. As an application, we use the projectors to prove quasioptimal convergence for the edge finite element approximation of the axisymmetric time-harmonic Maxwell equations on nonsmooth domains. Supplementary numerical investigations on convergence deterioration at high wavenumbers and near Maxwell eigenvalues and are also reported.

Symmetric Nonconforming Mixed Finite Elements For Linear Elasticity, Jay Gopalakrishnan, Johnny Guzmán

Mathematics and Statistics Faculty Publications and Presentations

We present a family of mixed methods for linear elasticity that yield exactly symmetric, but only weakly conforming, stress approximations. The method is presented in both two and three dimensions (on triangular and tetrahedral meshes). The method is efficiently implementable by hybridization. The degrees of freedom of the Lagrange multipliers, which approximate the displacements at the faces, solve a symmetric positive-definite system. The design and analysis of this method is motivated by a new set of unisolvent degrees of freedom for symmetric polynomial matrices. These new degrees of freedom are also used to give a new simple calculation of the …

Balance Systems And The Variational Bicomplex, Serge Preston

Mathematics and Statistics Faculty Publications and Presentations

In this work we show that the systems of balance equations (balance systems) of continuum thermodynamics occupy a natural place in the variational bicomplex formalism. We apply the vertical homotopy decomposition to get a local splitting (in a convenient domain) of a general balance system as the sum of a Lagrangian part and a complemental "pure non-Lagrangian" balance system. In the case when derivatives of the dynamical fields do not enter the constitutive relations of the balance system, the "pure non-Lagrangian" systems coincide with the systems introduced by S. Godunov [Soviet Math. Dokl. 2 (1961), 947–948] and, later, asserted as …

Explicit Constructions Of Rip Matrices And Related Problems, Jean Bourgain, S J. Dilworth, Kevin Ford, Sergei Konyagin, Denka Kutzarova

Faculty Publications

We give a new explicit construction of n×N matrices satisfying the Restricted Isometry Property (RIP). Namely, for someε > 0, largeN, and any n satisfyingN1−ε ≤ n ≤ N, we construct RIP matrices of order k ≥ n1/2+ε and constant δ = n−ε. This overcomesthe natural barrier k = O(n1/2) for proofs based on small coherence, which areused in all previous explicit constructions of RIP matrices. Key ingredients in ourproof are new estimates for sumsets in product sets and for exponential sums with theproducts of sets possessing special additive structure. We also give a construction ofsets of n complex numbers whose …

Phenomenology As Eschatological Materialism, Neal Deroo

Faculty Work Comprehensive List

No abstract provided.

Our Voices: A Descriptive Account Of African American Parental Involvement In An Urban Elementary School, Charletta D. Sudduth

Dissertations and Theses @ UNI

Parent involvement may have implications for student achievement (Epstein, 1986; Hoover-Dempsey, Bassler, & Brisse, 1987; Lopez, Scribner, & Mahitivanichcha, 2001). Today African-American parents are frequently criticized for not being involved enough in their students' education (Dearing, Kreider, Simpkins, & Weiss, 2006). African-American parent involvement can be limited due to a lack of time, monetary resources, or transportation; past negative experiences with school; a non-welcoming school environment; or a different definition of parent involvement (Epstein, 2001, Hamre & Pianta, 2001; Hill, Castellino, Lansford, Dodge, Bates, et al., 2004; Hughes & Kwok, 2007). Missing from the research of both Hoover Dempsey and …

Maggie And Her Students: Talking And Reasoning In A Reform-Based Mathematics Classroom, Debra Louise Semm Rich

Dissertations and Theses @ UNI

In this qualitative case study, I explored how Maggie, the teacher, and her students used language to advance students' conceptual understanding of mathematics in a reform-based mathematics classroom. Specifically I sought to describe how Maggie's reform-based mathematics classroom environment impacted the quantity and quality of mathematical language spoken by her students. Maggie's eighth-grade mathematics classroom was observed during a course of study on data and statistics. Three semi-structured interviews with Maggie, artifacts provided by her, and fourteen 52-minute classroom lessons, supported with field notes, were analyzed.

Environmental themes were revealed as they related to Maggie, her beliefs, goals, knowledge, and …

Effective Professional Development For Teachers Of Students With Autism, Erin Marie Torruella

Dissertations and Theses @ UNI

The number of students with autism is on the rise. The main treatment for children with autism is their education. It is essential that teachers are prepared to work with students with autism. The purpose of this study was to determine the effectiveness of a teacher training workshop held by Area Education Agency 267. Fifty-one participants of the workshop training responded to a survey regarding their implementation of strategies learned, their understanding of the content and strategies learned, the change in their planning and delivery of instruction, and the impact on their students' achievement.

The study found that the training …

The United States Of The World: Human Rights, Political Entrepreneurship, And U.S. Foreign Policy Via Affective And Rational Politics, Marriah Star

Dissertations, Theses, and Capstone Projects

This study examines how Political Entrepreneurs in the United States Congress responded to human rights abuses in six countries during the 1970s and 1980s: Cambodia, El Salvador, South Africa, the Soviet Union, Taiwan, and Uganda. It presents a four-point model for approaching the study of United States human rights policy. The key element in all the cases is bonding social capital, also called affective politics. American policy towards the Soviet Union and Uganda both demonstrate the integration of international, transnational, and domestic politics. Taiwan receives special attention because U.S. Taiwan policy continues to exemplify the integration of international relations, transnational …

An Analysis Of Managing Waste And Decreasing Lead Time In A Medium Sized Manufacturing Company, Tahir Murgic

Dissertations and Theses @ UNI

The importance of managing waste and reducing lead time in manufacturing cannot be denied. This study provides knowledge about both topics in a medium sized manufacturing company. The methodology that is used in this research is mixed methodology. Interviews were done with managers, and they were analyzed qualitatively. The next part is the quantitative research part that is done by asking employees via questionnaire. This study provided the close concepts of JIT (Just in Time) and waste management. Management must be committed to change, to train everyone to the new culture, to ensure that the organization's culture fosters employee participation, …

Examining The Use Of Collocations In Natural Language Processing, Patrick Anthony Burke

Dissertations and Theses @ UNI

Studies in Natural Language Processing are often dedicated to defining the lexicon and grammar rules of individual languages. It is a common understanding that virtually all statements that a language user encounters are unique constructions that have never been seen before. Because of this, there has been very little modem research regarding the use of repeated language when attempting to provide computers with language processing functionality. It seems reasonable that most statements we use on a daily basis are completely new when they are evaluated in their entirely. However, it is possible that smaller portions of these statements are reused. …

Management Of Wind Power Generation With The Attachment Of Wind Tunnel, Ulan Dakeev

Dissertations and Theses @ UNI

This study presents a new approach in which a wind tunnel apparatus is used to identify the efficiency of power output by a wind turbine with a 400W rating. Moreover, the study addresses a significant issue concerning the turbulence formed by a natural wind which can be eliminated or reduced with the use of the proposed wind tunnel. Wind power characteristics that indicate power output versus wind velocity are obtained by performing a number of case studies. The case studies include normal operation of the experimental wind turbine at variable wind velocity values with and without proposed wind tunnel. A …