Digital Commons Network^™

Northern Harrier Hatches Mallard Nest, Jeffery W. Stackhouse, Benjamin A. Geaumont

The Prairie Naturalist

The northern harrier (Circus cyaneus) is a widespread raptor commonly found nesting throughout the Northern Great Plains. Northern harriers forage primarily on small mammals and passerines with the males providing the majority of prey to nestlings until 14–28 days of age (Redpath et al. 2006, Vukovich and Ritchison 2006). Although the genus Circus is known to predate eggs from nest of many nesting birds (Hiraldo et al. 1975, Donaszar et al. 1996, Opermanis et al. 2000), few have been recorded commandeering nests of different species (Laine 1928, Fleskes 1992). In June 2010, we observed a northern harrier that …

Late Seasonal Captures Of The Plains Pocket Mouse (Perognathus Flavescens) In Iowa, Hans W. Otto, Jeremy A. White

The Prairie Naturalist

The plains pocket mouse, Perognathus flavescens, is a nocturnal granivore that inhabits friable soils in sparsely vegetated areas (Monk and Jones 1996). In the United States, the distribution of the plains pocket mouse extends from Arizona, New Mexico, and Texas through the Great Plains to North Dakota and Minnesota (Hall 1981). This species reaches its easternmost limits in Iowa, where it has been documented from a limited number of grassland sites in eastern, central, and western parts of the state (Bowles 1975, Wilson et al. 1996). Due to loss of grassland habitat, the plains pocket mouse is currently listed …

Rainbow: An R Package For Visualizing Functional Time Series, Han Lin Shang

The R Journal

Recent advances in computer technology have tremendously increased the use of functional data, whose graphical representation can be infinite-dimensional curves, images or shapes. This article describes four methods for visualizing functional time series using an R add-on package. These methods are demonstrated using age-specific Australian fertility data from 1921 to 2006 and monthly sea surface temperatures from January 1950 to December 2006.

Using The Google Visualisation Api With R, Markus Gesmann, Diego De Castillo

The R Journal

The googleVis package provides an interface between R and the Google Visualisation API to create interactive charts which can be embedded into web pages. The best known of these charts is probably the Motion Chart, popularised by Hans Rosling in his TED talks. With the googleVis package users can easily create web pages with interactive charts based on R data frames and display them either via the local R HTTPhelp server or within their own sites.

Ckmeans.1d.Dp: Optimal K-Means Clustering In One Dimension By Dynamic Programming, Haizhou Wang, Mingzhou Song

The R Journal

The heuristic k-means algorithm, widely used for cluster analysis, does not guarantee optimality. We developed a dynamic programming algorithm for optimal one-dimensional clustering. The algorithm is implemented as an R package called Ckmeans.1d.dp. We demonstrate its ad vantage in optimality and runtime over the standard iterative k-means algorithm.

Implementing The Compendium Concept With Sweave And Docstrip, Michael Lundholm

The R Journal

This article suggests an implementation of the compendium concept by combining Sweave and the LATEX literate programming environment DOCSTRIP.

Content-Based Social Network Analysis Of Mailing Lists, Angela Bohn, Ingo Feinerer, Kurt Hornik, Patrick Mair

The R Journal

Social Network Analysis (SNA) provides tools to examine relationships between people. Text Mining (TM) allows capturing the text they produce in Web 2.0 applications, for example, however it neglects their social structure. This paper applies an approach to combine the two methods named “content-based SNA”. Using the R mailing lists, R-help and R-devel, we show how this combination can be used to describe people’s interests and to find out if authors who have similar interests actually communicate. We find that the expected positive relationship between sharing interests and communicating gets stronger as the centrality scores of authors in the communication …

Watch Your Spelling!, Kurt Hornik, Duncan Murdoch

The R Journal

We discuss the facilities in base R for spell checking via Aspell, Hunspell or Ispell, which are useful in particular for conveniently checking the spelling of natural language texts in package Rd files and vignettes. Spell checking performance is illustrated using the Rd files in package stats. This example clearly indicates the need for a domain-specific statistical dictionary. We analyze the results of spell checking all Rd files in all CRAN packages and show how these can be employed for building such a dictionary.

Nonparametric Goodness-Of-Fit Tests For Discrete Null Distributions, Taylor B. Arnold, John W. Emerson

The R Journal

Methodology extending nonparametric goodness-of-fit tests to discrete null distributions has existed for several decades. However, modern statistical software has generally failed to provide this methodology to users. We offer a revision of R’s ks.test() function and a new cvm.test() function that fill this need in the R language for two of the most popular nonparametric goodness-of-fit tests. This paper describes these contributions and provides examples of their usage. Particular attention is given to various numerical issues that arise in their implementation.

Portable C++ For R Packages, Martyn Plummer

The R Journal

Package checking errors are more common on Solaris than Linux. In many cases, these errors are due to non-portable C++ code. This article reviews some commonly recurring problems in C++ code found in R packages and suggests solutions.

Glm2: Fitting Generalized Linear Models With Convergence Problems, Ian C. Marschner

The R Journal

The R function glm uses step-halving to deal with certain types of convergence problems when using iteratively reweighted least squares to fit a generalized linear model. This works well in some circumstances but non-convergence remains a possibility, particularly with a non standard link function. In some cases this is be cause step-halving is never invoked, despite a lack of convergence. In other cases step-halving is invoked but is unable to induce convergence. One remedy is to impose a stricter form of step halving than is currently available in glm, so that the deviance is forced to decrease in every iteration. …

Creating And Deploying An Application With (R)Excel And R, Thomas Baier, Erich Neuwirth, Michele De Meo

The R Journal

We present some ways of using R in Excel and build an example application using the package rpart. Starting with simple interactive use of rpart in Excel, we eventually package the code into an Excel-based application, hiding all details (including R itself) from the end user. In the end, our application implements a service oriented architecture (SOA) with a clean separation of presentation and computation layer

Grapher: A Multiplatform Gui For Drawing Customizable Graphs In R, Maxime Hervé

The R Journal

This article presents GrapheR, a Graphical User Interface allowing the user to draw customizable and high-quality graphs without knowing any R commands. Six kinds of graph are available: histograms, box-and-whisker plots, bar plots, pie charts, curves and scatter plots. The complete process is described with the examples of a bar plot and a scatter plot illustrating the legendary puzzle of African and European swallows’ migrations.

Program Committee Report December 2011, Regenstrief Center For Healthcare Engineering

RCHE Reports

No abstract provided.

Evaluation Of Fastt Math, Krystal Clawson, Valerie Grier, Amanda Iocoangeli

Graduate Capstone Projects

FASTT Math is an online, computer-based program that helps students develop fluency with basic math facts. FASTT Math can be used by students in second grade and up. Monroe Public Schools implemented this program in 2008 as a way to help improve fact fluency in the elementary grades. An evaluation of the effectiveness of the program was conducted and recommendations for future use are provided.

Effects Of Nitrogen Deposition And Empirical Nitrogen Critical Loads For Ecoregions Of The United States, Linda H. Pardo, Mark E. Fenn, Christine L. Goodale, Linda H. Geiser, Charles T. Driscoll, Edith B. Allen, Jill S. Baron, Roland Bobbink, William D. Bowman, Christopher M. Clark, Bridget Emmett, Frank S. Gilliam, Tara L. Greaver, Sharon J. Hall, Erik A. Lilleskov, Lingli Liu, Jason A. Lynch, Knute J. Nadelhoffer, Steven S. Perakis, Molly J. Robin-Abbott, John L. Stoddard, Kathleen C. Weathers, Robin L. Dennis

Biological Sciences Faculty Research

Human activity in the last century has led to a significant increase in nitrogen (N) emissions and atmospheric deposition. This N deposition has reached a level that has caused or is likely to cause alterations to the structure and function of many ecosystems across the United States. One approach for quantifying the deposition of pollution that would be harmful to ecosystems is the determination of critical loads. A critical load is defined as the input of a pollutant below which no detrimental ecological effects occur over the long-term according to present knowledge. The objectives of this project were to synthesize …

Inventing Norms, William Hubbard

All Faculty Scholarship

Patent law strives to promote the progress of technology by encouraging invention. Traditionally, scholars contend that patent law achieves this goal by creating financial incentives to invent in the form of exclusive rights to new technology. This traditional view of invention, however, fails to recognize that inventors are motivated by more than money. Like most people, inventors are also motivated by social norms, that is, shared normative beliefs favoring certain actions while disfavoring others. This Article argues that many Americans embrace social norms that favor and encourage successful invention. Because of these "inventing norms" inventors enjoy enhanced personal satisfaction and …

Government By Contract And The Structural Constitution, Kimberly L. Wehle

All Faculty Scholarship

Although private parties have performed government functions throughout most of Western history, mainstream administrative law scholarship is dotted with concerns over the extent to which modern federal government activities are outsourced to private contractors. Federal contractors routinely exercise authority that is classically “executive” in nature. They write regulations, interpret laws, administer foreign aid, manage nuclear weapons sites and intelligence operations, interrogate detainees, control borders, design surveillance systems, and provide military support in combat zones. Administrative law places few constraints on private contractors, and prevailing constitutional principles — the state action and private delegation doctrines, in particular — are either inept …

Visual And Media Literacy, The Overlooked Competencies: How We Are Influenced By What We See, Frances A. May

LOEX Conference Proceedings 2009

We are often taught to analyze verbal and written communication, but the analysis of visual communication, (for example, in advertising, art, media, and film,) is often neglected or ignored. This presentation is intended to show attendees the ways in which pictures and videos affect them, and how to analyze and decode images in order to construct meaning from the visuals. They can then pass this information on to their students.

Patricia Senn Breivik argues that information literacy should incorporate multiple types of literacy, including computer, library, media, network, and visual literacy (2005). In an era of massive exposure to visual …

The Savvy Researcher: Teaching Information Management Skills To Graduate Students, Merinda Kaye Hensley

LOEX Conference Proceedings 2009

Who better to teach information management skills than librarians? Run-of-the-mill library instruction rarely leaves time to cover topics such as current awareness tools, copyright concerns or scholarly communication education. The Savvy Researcher asks us to reconsider the drop-in workshop as a venue for the inquisitive graduate student. In this interactive session, we’ll demonstrate several active learning techniques including PowerLearn, a form of speed dating for instruction. You will develop a lesson plan to implement a workshop/module customized for the needs of your institution. At the end of this session, don't miss the Pecha Kucha, “Every path has its puddle: We …

Doing It Right: Collaboration, Shared Workspaces, Syndication And Broadcasting At The Animated Tutorial Sharing Project, Carmen Kazakoff-Lane, Paul Betty

LOEX Conference Proceedings 2009

In Information Literacy, collaboration is a catch phrase for librarians working together with others within their institutions - but important collaboration must occur across institutions as well, if we are to meet increasing user demands for 24/7, point-of-need, instruction.

Learn how the ANimated Tutorial Sharing Project (ANTS) facilitates inter-institutional collaboration and enables libraries to build a critical mass of open source tutorials (aka Open Educational Resources) that can be uploaded, downloaded, customized, subscribed to, embedded, or syndicated via sites like Facebook, iTunes or Libguides. Also learn:

- How ANTS works to eliminate duplication of effort across institutions,

- How ANTS …

Save A Horse, Ride A New Train Of Thought: Using Threshold Concepts To Teach Information Literacy, Lori Townsend, Korey Brunetti, Amy R. Hofer

LOEX Conference Proceedings 2009

The sun beat down on a high, lonesome hilltop in Hayward... where three librarians at Cal State East Bay were redesigning a credit-bearing first-year Information Literacy course in order to move the content online. They reckoned that creating this online hootenanny would require rustling up some fresh lessons and activities and distilling the class down to a few essential learning objectives, based on ACRL standards. One librarian thundered into town with talk of "threshold concepts," a pedagogical strategy developed by Jan Meyer and Ray Land. Could threshold concepts serve as a lasso for students to snare a deeper understanding of …

The Map Is Useless Unless You Know Where You Are: Information Literacy Pre-Assessment As A Tool For Understanding And Collaboration, Jason Ertz

LOEX Conference Proceedings 2009

The objective of this presentation is to provide librarians with a potential outline for beginning an information literacy assessment strategy, starting with pre-assessment. Librarians unsure about where to start when it comes to assessment will find that developing a pre-test can be a great way to start such a strategy collaborating with classroom faculty. Pre-assessment also is nonjudgmental pertaining to faculty’s teaching abilities and students’ learning making it an easier sell for collaboration or even initiating collaboration where none existed. If we can’t know where students end up after a class, at least we can get a sense of where …

Management Theories In Manufacturing, James Nathan Webster

Graduate Research Papers

The principles and ideology of management have been around for thousands of years. "Before industrialization, organizations were primarily the household, the tribe, the church, the military, and government" (Wren, 1987, p. 13). It was very rare for people to gather and organize outside of these structures prior to the industrial revolution. As mankind and civilization have progressed, the power of organizations has shifted throughout time. In the time of Confucius, government positions were of the utmost respect, and Confucius taught that positions of power "should go to men of proven merit and ability" (Wren, 1987, p. 14). The ancient Egyptians …

On The Accuracy Of Classical And Long Wavelength Approximations For Phonon Transport In Graphene, Dhruv Singh, Jayathi Murthy, Timothy S. Fisher

Birck and NCN Publications

This paper presents a critical evaluation of the approximations usually made in thermal conductivity modeling applied to graphene. The baseline for comparison is thermal conductivity computations performed using a rigorous calculation of three-phonon scattering events and accounting for the anharmonicity of interatomic forces. Three central assumptions that underlie published theories are evaluated and shown to compromise the accuracy of thermal conductivity predictions. It is shown that the use of classical phonon occupation statistics in place of the Bose-Einstein distribution causes the overprediction of specific heat and the underprediction of phonon relaxation time; for ZA phonons, the classical approximation can underpredict …

Fall Field Report, August–November 2011, W. Ross Silcock

Nebraska Bird Review

Overall, this fall migration was routine (waterfowl, warblers, sparrows), but there were a few unexpected highlights. The flooded Missouri River Valley provided habitat that led to some amazing fall counts: 3000 pelicans, 5700 coots, 338 American Golden-Plovers, and 1200 Pectoral Sandpipers. The 10,000 cormorants at Harlan County Reservoir may not have been affected by the Missouri River flooding, and were a record count also. While we're talking numbers, the martin roost in Omaha topped out at 50,000–55,000, and seasonal totals of 4 Red-necked Grebes and 15 Philadelphia Vireos for the state, 34 Mississippi Kites over Ogallala (it's often hard to …

Fall 2011 Bird Banding At Wildcat Hills Nature Center, Colin Woolley

Nebraska Bird Review

Rocky Mountain Bird Observatory has been operating a fall migration bird banding station at the Wildcat Hills Nature Center in Scotts Bluff Co. since 2007. In 2011, during our fifth year of banding, we captured a few new species, had new high totals for other species, and had a record number new high total of recaptures. Weather permitting, we banded on weekdays from August 31 through October 10 for five hours per day beginning soon after sunrise. We caught and banded 735 individual birds of 32 species. We banded two new species for the station in 2011: one Red-eyed Vireo …

City Of Industry: Los Efectos Concretos En El Condado De Los Angeles En La Economía, El Medio Ambiente Y La Salud Pública, Christina Andrea Hernandez

World Languages and Cultures

This project attempts to document the development of the City of Industry, located in eastern Los Angeles County, and to examine the environmental as well as socio-economic effects this industrial hub maintains on its surrounding neighborhoods. City of Industry, since its incorporation in 1957, has established an alarming precedent as a privatized city that has informed concrete changes in the local economy, the environment, and the public health of the surrounding communities that are predominantly Latina(o).

The research undertaken for this project represents an interdisciplinary intersection of a special topic in the study of Industrial Engineering: the global logistics industry, …

Order On Motion For Summary Judgment And Entry Of Final Judgment (Beale)), Melvin K. Westmoreland

Superior Court of Fulton County: Metro Atlanta Business Case Division Opinions

No abstract provided.

Order On Motion For Summary Judgment And Entry Of Final Judgment (O'Shea), Melvin K. Westmoreland

Superior Court of Fulton County: Metro Atlanta Business Case Division Opinions

No abstract provided.