Digital Commons Network^™

Three-Dimensional Microfluidic Devices Fabricated In Layered Paper And Tape, Andres W. Martinez, Scott T. Phillips, George M. Whitesides

Chemistry and Biochemistry

This article describes a method for fabricating 3D microfluidic devices by stacking layers of patterned paper and double-sided adhesive tape. Paper-based 3D microfluidic devices have capabilities in microfluidics that are difficult to achieve using conventional open-channel microsystems made from glass or polymers. In particular, 3D paper-based devices wick fluids and distribute microliter volumes of samples from single inlet points into arrays of detection zones (with numbers up to thousands). This capability makes it possible to carry out a range of new analytical protocols simply and inexpensively (all on a piece of paper) without external pumps. We demonstrate a prototype 3D …

Down River By John Hart - Reviewed By Judi Morrel, Judi Morrel

LAS Faculty Book Reviews

No abstract provided.

Advancing Pre-Service Teachers’ Mathematical Sophistication Via Mathematical Tasks, Kien Lim

Selected Works Temporary Series

This article is based on the seminar that the author presented for the Hong Kong Association for Mathematics Education at the Hong Kong Baptist University on May 22, 2008. In this article, the author differentiates (a) between institutionalized mathematics and school mathematics, (b) between ways of understanding and ways of thinking as two complementary subsets of mathematics that students should develop, (c) between sophisticated learners and passive learners, and (d) between knowledge dissemination and knowledge engagement as two modes of instructions. Harel’s (2007) pedagogical principles are discussed in relation to the design of mathematical tasks and their use in classrooms. …

Saari’S Homographic Conjecture Of The Three-Body Problem, Florin Diacu, Toshiaki Fujiwara, Ernesto Pérez-Chavela, Manuele Santoprete

Mathematics Faculty Publications

Saari’s homographic conjecture, which extends a classical statement proposed by Donald Saari in 1970, claims that solutions of the Newtonian n-body problem with constant configurational measure are homographic. In other words, if the mutual distances satisfy a certain relationship, the configuration of the particle system may change size and position but not shape. We prove this conjecture for large sets of initial conditions in three-body problems given by homogeneous potentials, including the Newtonian one. Some of our results are true for n ≥ 3.

The Application Of Electrical Resistivity And Microgravity To Locate Tunnels Along The U.S.-Mexico Border At Calexico, Gina Lee Cesin

Masters Theses & Specialist Projects

No abstract provided.

Water Quality Impacts From Agricultural Land-Use In The Karst Groundwater Basin Of Qingmuguan, Chongqing, China, Ted W. Baker

Masters Theses & Specialist Projects

Karst regions are composed of soluble rock, often limestone, which leads to the formation of fissures, sinkholes and water flow conduits such as caves. Pollutants in karst waters tend to be quickly directed and concentrated into these subsurface conduits. As a result of this and other factors, water resources are especially sensitive to contamination and pollution in karst areas. Pollutant concentrations going into fluvial systems travelling through the subsurface in karst areas are often very similar to the concentrations arriving at outlets such as springs. Areas connected by karst conduit flows must be distinctly determined and special attention should be …

Mathematical Models Of Zea Mays: Grain Yield And Aboveground Biomass Applied To Ear Flex And Within Row Spacing Variability, Todd Curtis Ballard

Masters Theses & Specialist Projects

Field studies were conducted during the summers of 2007 and 2008 at the Agricultural Research and Education Complex, Western Kentucky University, Warren County, KY and commercial production fields in Caldwell County, KY, Warrick County IN, and Vanderburgh County, IN. The goals of these studies were to further validate the Duncan grain yield model, the Russell aboveground biomass model, and to study the effect of inconsistent spacing within rows on Zea mays L. yield. Plant spacing other than uniform decreases grain yield and profitability. The population experiments conducted at the Warren County location were a randomized complete block design with three …

Atrazine Contamination And Suspended Sediment Transport Within Logsdon River, Mammoth Cave, Kentucky, Julie Eileen Schenck Brown

Masters Theses & Specialist Projects

Understanding the potential for karst aquifer contamination by sediment-sorbed pesticides is important for cave conservation efforts in agricultural landscapes. Flow rate, water quality parameters and suspended sediment concentrations were measured in Logsdon River, a ~10km karst conduit within the Turnhole Spring Groundwater Basin of Mammoth Cave National Park to determine characteristics of storm-period transport of sediment-sorbed atrazine through a conduit-flow karst aquifer.

Analysis of two independent precipitation events occurring in the Spring of 2008 from May 2-4 and May 27-29 demonstrated the rapid response of the Logsdon River to precipitation events with detections of atrazine increasing during the initial turbidity …

Numerical Modeling Of A Stenosed Artery Using Mathematical Model Of Variable Shape, S. Mukhopadhyay, G. C. Layek

Applications and Applied Mathematics: An International Journal (AAM)

The intention of the present work is to carry out a systematic analysis of flow behavior in a two-dimensional tube (modeled as artery) with a locally variable shaped constrictions. The simulated artery, containing a viscous incompressible fluid representing the flowing blood, is treated to be complaint as well as rigid tube. The shape of the stenosis in the arterial lumen is chosen to be symmetric as well as asymmetric about the middle cross section perpendicular to the axis of the tube in order to improve resemblance to the in-vivo situation. The constricted tube is transformed into a straight tube and …

Timss 2007: Taking A Closer Look At Mathematics And Science In Australia, Sue Thomson, Nicole Wernert, Catherine Underwood, Marina Nicholas

TIMSS 2007

The Trends in Mathematics and Science Study (TIMSS 2007) is the latest in a series of international studies of mathematics and science, conducted under the aegis of the International Association for the Evaluation of Educational Achievement (IEA). The goal of TIMSS is to provide comparative information about educational achievement across countries to improve teaching and learning in mathematics and science. TIMSS measures trends in mathematics and science achievement at Year 4 and Year 8, as well as monitoring curricular implementation. Conducted on a regular four-year cycle, TIMSS has assessed mathematics and science in 1995, 1999, 2003, and 2007. In addition …

Highlights From Timss 2007 From Australia’S Perspective: Highlights From The Full Report, Taking A Closer Look At Mathematics And Science In Australia, Sue Thomson, Nicole Wernert, Catherine Underwood, Marina Nicholas

TIMSS 2007

In 2007, Australia participated in the Trends in International Mathematics and Science Study (TIMSS 2007). TIMSS 2007 is the fourth in a cycle of internationally comparative assessments conducted under the aegis of the International Association for the Evaluation of Educational Achievement (IEA) dedicated to improving teaching and learning in mathematics and science for students around the world. Carried out every four years at Year 4 and Year 8, TIMSS provides data about trends in mathematics and science achievement over time. In Australia, TIMSS is part of MCEETYA’s National Assessment Program. To inform educational policy in the participating countries, this world-wide …

Steganography In Ipv6, Barret Miller

Computer Science and Computer Engineering Undergraduate Honors Theses

Steganography is the process of hiding a secret message within another message such that it is difficult to detect the presence of the secret message. In other words, the existence of the secret message is hidden. A covert channel refers to the actual medium that is used to communicate the information such as a message, image, or file. This honors thesis uses steganography within the source address fields of Internet Protocol Version 6 (IPv6) packets to create a covert channel through which clandestine messages are passed from one party to another. A fully functional computer program was designed and written …

Over S$17 Million Raised For The Sim Kee Boon Institute For Financial Economics At Singapore Management University, Singapore Management University

SMU Press Releases and News

No abstract provided.

Hydraulic Actuated Automotive Cooling Systems - Nonlinear Control And Test, John Wagner, M H. Salah, P M. Frick, D M. Dawson

Publications

The replacement of traditional automotive mechanical cooling system components with computer controlled servo-motor driven actuators can improve temperature tracking and reduce parasitic losses. The integration of hydraulic actuators in the engine cooling circuit offers greater power density in a smaller package space when compared with electric actuators. In this paper, a comprehensive nonlinear backstepping robust control technique is developed to regulate the engine coolant temperature by controlling a hydraulic coolant pump and radiator fan. An experimental test bench has been assembled to investigate the hydraulic automotive thermal system performance. Representative numerical and experimental results are presented and discussed. Overall, the …

Direct Extraction Of Normal Mapped Meshes From Volume Data, Mark Barry, Zoë J. Wood

Computer Science and Software Engineering

We describe a method of directly extracting a simplified contour surface along with detailed normal maps from volume data in one fast and integrated process. A robust dual contouring algorithm is used for efficiently extracting a high-quality "crack-free" simplified surface from volume data. As each polygon is generated, the normal map is simultaneously generated. An underlying octree data structure reduces the search space required for high to low resolution surface normal mapping. The process quickly yields simplified meshes fitted with normal maps that accurately resemble their complex equivalents.

Watershed Condition Assessment For Little River Canyon National Preserve, Alabama, Nathan Demille Rinehart

Masters Theses & Specialist Projects

No abstract provided.

A Hybrid Marine Protection System As A Model For The Marine Conservation Efforts Of The United States, Jessica D'Ardenne

Colorado Environmental Law Journal

No abstract provided.

Renormalization And Non-Rigidity, Vasu Venkata Mohana Sarma Chandramouli

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

[to be added]

Automatic Incrementalization Of Queries In Object-Oriented Programs, Thomas Michael Rothamel

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

[to be added]

Shape Registration And Analysis Framework For Computer Vision And Graphics, Sen Wang

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

[to be added]

The Effects Of Racial And Extracurricular Friendship Diversity On Achievement, Anil Nathan

Economics Department Working Papers

This paper finds the effect of having friends of a similar race and who are involved in similar activities. It explores data which allows a peer group to be defined openly through self nominations. Using a strategy that corrects for the endogeneity of peer effects by instrumenting using variables at the "grade within school" level, it is shown that friendship diversity can help whites increase achievement. Although not much significance was found with other races, most of the strategies pushed towards the direction of racial diversity aiding achievement. Regarding extracurricular activities, it is found that there is a benefit in …

On A-Ary Subdivision For Curve Design Ii. 3-Point And 5-Point Interpolatory Schemes, Jian-Ao Lian

Applications and Applied Mathematics: An International Journal (AAM)

The a-ary 3-point and 5-point interpolatery subdivision schemes for curve design are introduced for arbitrary odd integer a greater than or equal to 3. These new schemes further extend the family of the classical 4- and 6-point interpolatory schemes.

Advancing Pre-Service Teachers’ Mathematical Sophistication Via Mathematical Tasks, Kien Lim

Departmental Papers (Math)

This article is based on the seminar that the author presented for the Hong Kong Association for Mathematics Education at the Hong Kong Baptist University on May 22, 2008. In this article, the author differentiates (a) between institutionalized mathematics and school mathematics, (b) between ways of understanding and ways of thinking as two complementary subsets of mathematics that students should develop, (c) between sophisticated learners and passive learners, and (d) between knowledge dissemination and knowledge engagement as two modes of instructions. Harel’s (2007) pedagogical principles are discussed in relation to the design of mathematical tasks and their use in classrooms. …

The Connection, Winter 2008, Lindenwood University

The Connection (1989-2017)

Lindenwood University alumni magazine.

Simulation Modeling Of Karst Aquifer Conduit Evolution And Relations To Climate, John D. Broome

Masters Theses & Specialist Projects

ABSTRACT Karst regions of the world that receive relatively similar amounts of precipitation display a wide variety of landscapes. It has been suggested (Groves and Meiman, 2005) that climates exhibiting larger discrete storm events have more dissolving power and consequently higher rates of conduit growth than climates with more uniform precipitation distributions. To study this concept, a computer program “Cave Growth” was developed that modeled the growth of a cross-section of a cave passage under dynamic flow and chemical conditions. A series of 46 simulation datasets were created to represent different climatic conditions. These simulations had the same total annual …

Evidence Of A Novel Rna Secondary Structure In The Coding Region Of Hiv-1 Pol Gene., Qi Wang, Ian Barr, Feng Guo, Christopher Lee

Natural Sciences and Mathematics | Faculty Scholarship

RNA secondary structures play several important roles in the human immunodeficiency virus (HIV) life cycle. To assess whether RNA secondary structure might affect the function of the HIV protease and reverse transcriptase genes, which are the main targets of anti-HIV drugs, we applied a series of different computational approaches to detect RNA secondary structures, including thermodynamic RNA folding predictions, synonymous variability analysis, and covariance analysis. Each method independently revealed strong evidence of a novel RNA secondary structure at the junction of the protease and reverse transcriptase genes, consisting of a 107-nucleotide region containing three stems, A, B, and C. First, …

Calibrating Function Point Backfiring Conversion Ratios Using Neuro-Fuzzy Technique, Justin Wong, Luiz Fernando Capretz, Danny Ho

Electrical and Computer Engineering Publications

Software estimation is an important aspect in software development projects because poor estimations can lead to late delivery, cost overruns, and possibly project failure. Backfiring is a popular technique for sizing and predicting the volume of source code by converting the function point metric into source lines of code mathematically using conversion ratios. While this technique is popular and useful, there is a high margin of error in backfiring. This research introduces a new method to reduce that margin of error. Neural networks and fuzzy logic in software prediction models have been demonstrated in the past to have improved performance …

Peer Effects And The Indigenous/ Non‐Indigenous Early Test‐Score Gap In Peru, Chris Sakellariou

Aboriginal Policy Research Consortium International (APRCi)

This paper assesses the magnitude of the non-indigenous/indigenous test-score gap for third-year and fourth-year primary school pupils in Peru, in relation to the main family, school and peer inputs contributing to the test-score gap using the estimation method of feasible generalized least squares. The article then decomposes the gap into its constituent components using the traditional Oaxaca–Blinder decomposition method, as well as a modified decomposition method based on the estimation of a cognitive achievement production function. The decomposition results from both decomposition methods suggest that almost all of the test-score gap is explained by various peer, student, family and school …

"George Bush Doesn't Care About Black People": Hip Hop, Public Discourse And Black Politics In The Early 21st Century, Hazel Bell James Cole

Dissertations

Recently, more scholars are examining hip hop as a powerful cultural, communicative force, yet hip hop's political orientation goes unnoticed. This study highlights the politics found in hip hop culture and in rap music since 2000 by exploring hip hop as a social movement. This study utilizes a critical, cultural approach by applying ideological case study and textual analyses methods. Song lyrics, activist efforts and black politics prove the political orientation of hip hop culture, which revealed that rap music in general is limited by capitalistic, hegemonic restraints juxtaposed to rappers serving as the legitimate voice of the marginalized and …

Hydrochemistry Of Wetlands Along The Platte River Near Ashland, Nebraska, Carrie L. Wiese

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.