Digital Commons Network^™

Disappearance Of Phragmites In Louisiana And Nipponaclerda Biwakoensis, Rachel Tugger

Honors Capstones

No abstract provided.

A Discrete Element Method Study Of Granular Self-Organization In An Orbital-Driven Sphere And Computational Fluid Dynamics Simulations Of Slurry Flow In A Single-Loop Loop Reactor, Spencer Blum

Honors Capstones

No abstract provided.

Stress Fluctuation, Crack Renucleation And Toughening In Layered Materials, C. J. Hsueh, L. Avellar, B. Bourdin, G. Ravichandran, K. Bhattacharya

Faculty Publications

It has been established that contrast in the elastic properties can lead to enhancement of fracture toughness in heterogeneous materials. Focussing on layered materials as a model system, we show that this enhancement is a result of two distinct phenomena – first, fluctuations in stress leading to regions where the stress intensity at the crack is considerably smaller than that of the macroscopically applied value; and second, the lack of stress intensity when a crack is at a compliant to stiff interface thereby requiring renucleation. Using theoretical, computational and experimental methods, we study two geometries – a layered material and …

A Robust Solver For A Mixed Finite Element Method For The Cahn–Hilliard Equation, Susanne C. Brenner, Amanda E. Diegel, Li Yeng Sung

Faculty Publications

We develop a robust solver for a mixed finite element convex splitting scheme for the Cahn–Hilliard equation. The key ingredient of the solver is a preconditioned minimal residual algorithm (with a multigrid preconditioner) whose performance is independent of the spacial mesh size and the time step size for a given interfacial width parameter. The dependence on the interfacial width parameter is also mild.

Short-Term, Faculty-Led Study Abroad And Global Citizenship Identification: Insights From A Global Engagement Program, Lucy W. Mule, Shannon Audley, Kathryn Aloisio

Education and Child Study: Faculty Publications

Short-term, faculty-led study abroad programs are increasingly featured in higher education internationalization efforts. As noted in the literature, such programs can aid in the development of varied student outcomes, including developing global citizenship. This paper presents an examination of the Global Engagement Seminar (GES) program, a short-term, faculty-led program at a private women’s liberal arts college that has expressed a firm commitment to internationalization. A quasi-experimental design was employed to examine whether participation in the GES program influenced participants’ antecedents, identification, and pro-social values of global citizenship (Reysen & Katzarska-Miller 2013a), and how the relationships compare with those of a …

How To Build A Patient-Specific Hybrid Simulator For Orthopaedic Open Surgery: Benefits And Limits Of Mixed-Reality Using The Microsoft Hololens, Giuseppe Turini, Sara Condino, Paolo D. Parch, Rosanna M. Viglialoro, Nicola Piolanti, Marco Gesi, Mauro Ferrari, Vincenzo Ferrari

Computer Science Publications

Orthopaedic simulators are popular in innovative surgical training programs, where trainees gain procedural experience in a safe and controlled environment. Recent studies suggest that an ideal simulator should combine haptic, visual, and audio technology to create an immersive training environment. This article explores the potentialities of mixed-reality using the HoloLens to develop a hybrid training system for orthopaedic open surgery. Hip arthroplasty, one of the most common orthopaedic procedures, was chosen as a benchmark to evaluate the proposed system. Patient-specific anatomical 3D models were extracted from a patient computed tomography to implement the virtual content and to fabricate the physical …

Center For Educational Transformation, Research And Development Center Annual Report, November 2018, University Of Northern Iowa. Center For Educational Transformation.

CET Communications and Reports

The annual report of the Center for Educational Transformation at the University of Northern Iowa

Quality Assurance Plan For Monitoring White-Tailed Deer In The Heartland Inventory And Monitoring Network, United States National Park Service, Heartland Inventory And Monitoring Network

United States National Park Service: Publications

Abstract

In accordance with guidelines set forth by the National Park Service Inventory and Monitoring Division, a quality-assurance plan has been created for use by the Heartland Inventory and Monitoring Network in the implementation of the White-tailed Deer Monitoring Protocol (HTLN 2018). This quality-assurance plan documents the standards, policies, and procedures used by the Heartland Network for activities related to the collection, processing, storage, analysis, and publication of monitoring data. The policies and procedures documented in this quality-assurance plan complement the quality-assurance plans for other monitoring activities conducted by the Heartland Network and supplement the National Inventory and Monitoring Division …

Dynamical Constraints On The Hr 8799 Planets With Gpi, Jason J. Wang, James R. Graham, Rebekah Dawson, Daniel Fabrycky, Robert J. De Rosa, Laurent Pueyo, Quinn Konopacky, Bruce Macintosh, Christian Marois, Eugene Chiang, S. Mark Ammons, Pauline Arriaga, Vanessa P. Bailey, Travis Barman, Joanna Bulger, Jeffrey Chilcote, Tara Cotten, Rene Doyon, Gaspard Duchêne, Thomas M. Esposito, Michael P. Fitzgerald, Katherine B. Follette, Benjamin L. Gerard, Stephen J. Goodsell, Alexandra Z. Greenbaum, Pascale Hibon, Li Wei Hung, Patrick Ingraham, Paul Kalas, James E. Larkin, Jérôme Maire, Franck Marchis, Kimberly Ward-Duong

Astronomy: Faculty Publications

The HR 8799 system uniquely harbors four young super-Jupiters whose orbits can provide insights into the system's dynamical history and constrain the masses of the planets themselves. Using the Gemini Planet Imager, we obtained down to one milliarcsecond precision on the astrometry of these planets. We assessed four-planet orbit models with different levels of constraints and found that assuming the planets are near 1:2:4:8 period commensurabilities, or are coplanar, does not worsen the fit. We added the prior that the planets must have been stable for the age of the system (40 Myr) by running orbit configurations from our posteriors …

Studying The Potential Of The [Oii] Emission Line As A Surrogate For Stellar Velocity Dispersion In Active Galactic Nuclei, Edward F. Donohue

Physics

We study the emission profiles of 80 active galaxies to find a surrogate for stellar velocity dispersion. We focus on the width of the emission line of once ionized oxygen, [OII], and compare our results to previous work that used [OIII]. In previous research, [OIII] was found to be a good candidate for a surrogate for stellar velocity dispersion, but analysis of the line was complicated by the presence of wings caused by gas infall and outflow in the region. Emission lines with lower ionization levels, like [OII], are known to have less artificial line-broadening from wings. The study of …

Cross-Modal Recipe Retrieval With Stacked Attention Model, Jing-Jing Chen, Lei Pang, Chong-Wah Ngo

Research Collection School Of Computing and Information Systems

Taking a picture of delicious food and sharing it in social media has been a popular trend. The ability to recommend recipes along will benefit users who want to cook a particular dish, and the feature is yet to be available. The challenge of recipe retrieval, nevertheless, comes from two aspects. First, the current technology in food recognition can only scale up to few hundreds of categories, which are yet to be practical for recognizing tens of thousands of food categories. Second, even one food category can have variants of recipes that differ in ingredient composition. Finding the best-match recipe …

Gesture Recognition With Transparent Solar Cells, Dong Ma, Guohao Lan, Mahbub Hassan, Wen Hu, B. Mushfika Upama, Ashraf Uddin, Youseef, Moustafa

Research Collection School Of Computing and Information Systems

Transparent solar cell is an emerging solar energy harvesting technology that allows us to see through these cells. This revolutionary discovery is creating unique opportunities to turn any mobile device screen into solar energy harvester. In this paper, we consider the possibility of using such energy harvesting screens as a sensor to detect hand gestures. As different gestures impact the incident light on the screen in a different way, they are expected to create unique energy generation patterns for the transparent solar cell. Our goal is to recognize gestures by detecting these solar energy patterns. A key uncertainty we face …

Vpsearch: Achieving Verifiability For Privacy-Preserving Multi-Keyword Search Over Encrypted Cloud Data, Zhiguo Wan, Robert H. Deng

Research Collection School Of Computing and Information Systems

Although cloud computing offers elastic computation and storage resources, it poses challenges on verifiability of computations and data privacy. In this work we investigate verifiability for privacy-preserving multi-keyword search over outsourced documents. As the cloud server may return incorrect results due to system faults or incentive to reduce computation cost, it is critical to offer verifiability of search results and privacy protection for outsourced data at the same time. To fulfill these requirements, we design aVerifiablePrivacy-preserving keywordSearch scheme, called VPSearch, by integrating an adapted homomorphic MAC technique with a privacy-preserving multi-keyword search scheme. The proposed scheme enables the client to …

Improving Multi-Label Emotion Classification Via Sentiment Classification With Dual Attention Transfer Network, Jianfei Yu, Luis Marujo, Jing Jiang, Pradeep Karuturi, William Brendel

Research Collection School Of Computing and Information Systems

In this paper, we target at improving the performance of multi-label emotion classification with the help of sentiment classification. Specifically, we propose a new transfer learning architecture to divide the sentence representation into two different feature spaces, which are expected to respectively capture the general sentiment words and the other important emotion-specific words via a dual attention mechanism. Extensive experimental results demonstrate that our transfer learning approach can outperform several strong baselines and achieve the state-of-the-art performance on two benchmark datasets.

Recommending Who To Follow In The Software Engineering Twitter Space, Abhabhisheksh Sharma, Yuan Tian, Agus Sulistya, Dinusha Wijedasa, David Lo

Research Collection School Of Computing and Information Systems

With the advent of social media, developers are increasingly using it in their software development activities. Twitter is one of the popular social mediums used by developers. A recent study by Singer et al. found that software developers use Twitter to “keep up with the fast-paced development landscape.” Unfortunately, due to the general-purpose nature of Twitter, it’s challenging for developers to use Twitter for their development activities. Our survey with 36 developers who use Twitter in their development activities highlights that developers are interested in following specialized software gurus who share relevant technical tweets.To help developers perform this task, in …

Statistical Investigation Of Road And Railway Hazardous Materials Transportation Safety, Amirfarrokh Iranitalab

Department of Civil and Environmental Engineering: Dissertations, Theses, and Student Research

Transportation of hazardous materials (hazmat) in the United States (U.S.) constituted 22.8% of the total tonnage transported in 2012 with an estimated value of more than 2.3 billion dollars. As such, hazmat transportation is a significant economic activity in the U.S. However, hazmat transportation exposes people and environment to the infrequent but potentially severe consequences of incidents resulting in hazmat release. Trucks and trains carried 63.7% of the hazmat in the U.S. in 2012 and are the major foci of this dissertation. The main research objectives were 1) identification and quantification of the effects of different factors on occurrence and …

Predicting First Term Success In An Associates Degree Nursing Program Using Cognitive And Noncognitive Factors, Richard Hilton Turner

Doctoral Dissertations and Projects

Since the late 1990s the nursing field has experienced increased demand for RN’s as well as a number of internal and external factors that have worsened this problem. College admissions officers have struggled to identify those students who are most likely to persist in an associate degree nursing (ADN) program. Estimates of programmatic attrition vary, but fall somewhere between 25-50%. A great deal of research has been expended in an attempt to determine which preadmission variables are most likely to indicate programmatic success. Unfortunately, no “best set” of admissions variables has been identified. The purpose of this research was to …

Novice Elementary Teachers’ Experiences With Preparedness To Teach Mathematics: A Phenomenological Study, Ashleigh Rose Chaves

Doctoral Dissertations and Projects

The purpose of this transcendental phenomenological study was to describe novice elementary teachers’ experiences with preparedness to teach mathematics in a large school district in southeastern Massachusetts. In defining the novice elementary teachers’ experiences, I looked at the participants’ self-efficacy through the lens of Bandura’s self-efficacy theory. Self-efficacy was defined as how confident the novice teachers were in regard to their ability to teach mathematics. The focus of this study was how adequately prepared the teachers felt teaching elementary mathematics but also investigated how the teachers felt about their readiness to address the challenges students experience in mathematics. The following …

A Transcendental Phenomenological Investigation Of Novice Teachers' Experiences With Parental Involvement In Title I Elementary Schools, Kelly Jean Wilson

Doctoral Dissertations and Projects

The purpose of this transcendental phenomenological study was to describe novice teachers’ experiences with parental involvement in Title I elementary schools in southern Virginia. Parental involvement was defined as parents actively engaging in their child’s education, critically important to academic development. Kolb’s (2015) experiential learning theory was the theoretical framework for this study. The significance of this study investigated novice teachers, those with five or fewer years’ teaching background, and their experiences with parental involvement in Title I elementary schools. In doing so, 14 novice teachers from Title I elementary schools in southern Virginia, were chosen to participate. Interviews, individual …

A Job Embeddedness Comparison Of Professors Based On Employment Status And Type, Jeremy Todd Bowser

Doctoral Dissertations and Projects

The purpose of this study was to explore the possibility of difference in the job embeddedness attitudes of full-time and part-time professors, and possible differences in job embeddedness attitudes between professors at community colleges and state universities. This research project focused on Criminology and Criminal Justice departments. The dependent variables were on-the-job and off-the-job embeddedness, and the independent variables were school type and employment status. The timely study was based on the recent trend toward hiring adjunct professors in lieu of tenured professors at community colleges and universities. The literature review identified a lacuna in the embeddedness literature within the …

Soil-Plant Interface, Carbon Sequestration And The Eco Physiological Growth Of Salsola Imbricata And Zygophyllum Mandaville Using Locally Grown Rhizosphere And Endophytic Bacteria, Nour Elhouda Debouza

Civil and Environmental Theses

Salsola imbricata and Zygophyllum Mandeville are halophytic plants available widely in the UAE. These two species have important environmental services such as sand dune fixation, which will potentially improve plant cover and help tackle the problem of desertification. The species were selected due to their availability and role in the desert environment of the UAE. Plants are also constantly involved in interactions with a wide range of bacteria in the soil. These plant-associated bacteria colonize the rhizosphere (rhizobacteria), and the internal plant tissues (bacterial endophytes). Endophytic bacteria are those capable of colonizing live internal plant tissues which can be isolated …

Is Efficiency Biased?, Zachary Liscow

University of Chicago Law Review

Efficiency is a watchword in policy circles. If we choose policies that maximize people’s willingness to pay, we are told, we will grow the economic pie and thus benefit the rich and poor alike. Who would oppose efficiency when it is cast in this fashion?

However, there are actually two starkly different types of efficient policies: those that systematically distribute equally to the rich and the poor and those that systematically distribute more to the rich.

Our collective failure to grasp this distinction matters enormously for those with a wide range of political commitments. Many efficient policies distribute more to …

Contemporary Civil War In Northern Ireland, The Long-Term Effects On Children, And Resulting Interventions, Danielle Bolden

Honors Projects

This paper examines the consequences of violent civil conflict for children, including academic inequality, increased behavior problems, and increased mental health disorders, as well as the interventions directly related. Focusing on The Troubles, a brief history of the conflict in Northern Ireland is presented along with theories about the causes, then the consequences of The Troubles are compared to the consequences of other civil conflicts. The interventions in Northern Ireland include integrated schools and housing, community programs revolved around open dialogues that encourage participation from both Catholic and Protestant members, and widely available mental health services. I conclude interventions like …

Bill Evans Senior Honors Project, Reese Lyon Rehkopf

Honors Projects

A paper on the life and music of Bill Evans and his influence on jazz music. This project consists of three transcriptions of Evans' jazz improvisations and a paper.

The Ouroboros Of Rubrics: A Conundrum, A Case, And A Call, Anita Bright

Curriculum and Instruction Faculty Publications and Presentations

In this think piece, the author explores a conundrum and tension related to using rubrics to evaluate doctoral work. She ponders whether the use of rubrics provides beneficial ways for students to “crack the code” of academia, and/or whether the use of rubrics is perhaps a tool to engender conformity. With these competing ideas in mind, the author considers in what ways one might press for means to provide this on-ramp of access for students to the existing power structures, while at the same time seeking to change academia, to more equitably provide spaces for a range in ways of …

Guest Editorial Special Issue On Increasing The Socio-Cultural Diversity Of Electrical And Computer Engineering And Related Fields, Shannon M. Chance, L Bottomley, K Panetta, B Williams

Research Outputs: 2025-Present

No abstract provided.

Let's Take A Break: Analysis Of The Incubation Effect Among Students Using A Learning Game For Physics, May Marie P. Talandron-Felipe, Ma. Mercedes T. Rodrigo

Department of Information Systems & Computer Science Faculty Publications

This study continues prior work of the investigation and modeling of Incubation Effect, a phenomenon in which a momentary break helps the generation of a solution to a problem, among students using in a computer-based learning environment called Physics Playground. This paper attempts to improve the detection of IE-False by identifying notable features among instances of unsuccessful incubation by using a combination of t-SNE dimensionality reduction and x-means clustering techniques. We found that there are overlaps on some characteristics of IE-True and IE-False incidences but discovered features that do not make a break beneficial which are low success rate prior …

Synthesis And Biological Evaluation Of Phaeosphaeride A Derivatives As Antitumor Agents, Victoria Abzianidze, Petr Beltyukov, Sofya Zakharenkova, Natalia Moiseeva, Jennifer Mejia, Alvin Holder, Yuri Trishin, Alexander Berestetskiy, Victor Kuznetsov

Chemistry & Biochemistry Faculty Publications

New derivatives of phaeosphaeride A (PPA) were synthesized and characterized. Anti-tumor activity studies were carried out on the HCT-116, PC3, MCF-7, A549, К562, NCI-Н929, Jurkat, THP-1, RPMI8228 tumor cell lines, and on the HEF cell line. All of the compounds synthesized were found to have better efficacy than PPA towards the tumor cell lines mentioned. Compound 6 was potent against six cancer cell lines, HCT-116, PC-3, K562, NCI-H929, Jurkat, and RPMI8226, showing a 47, 13.5, 16, 4, 1.5, and 7-fold increase in anticancer activity comparative to those of etoposide, respectively. Compound 1 possessed selectivity toward the NCI-H929 cell line (IC …

Quantification Of Cloud Condensation Nuclei Effects On The Microphysical Structure Of Continental Thunderstorms Using Polarimetric Radar Observations, Kun-Yuan Lee

Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research

Aerosols serving as cloud condensation nuclei (CCN) are crucial to the microphysical structure of thunderstorms. They can also alter the rate of cloud microphysical processes, the moisture profile and the local temperature as a result of latent heating/cooling in the early stage of thunderstorm development. Continental thunderstorms are characterized by high complexity and are highly influenced by environmental conditions. The purpose of this study is to determine the influences of CCN concentration on the microphysics of continental thunderstorms, using a sample of storms from northwestern Oklahoma. The Weather Surveillance Radar-1988 Doppler (WSR-88D) at Vance Air Force Base (KVNX) was upgraded …

Examining Patterns In Nest Predation Using Artificial Nests, Victoria L. Simonsen

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

The use of artificial nests to study the predation of avian nests has faced disregard by ecologists due to inconsistencies found between the survival rates of real and artificial nests across studies and reviews. The negative perception of artificial nests providing an inconsistent assessment of survival has thus fostered the perception that artificial nests are a secondary option to be used to overcome logistical hurdles associated with achieving sufficient sample sizes in systems where study species are rare or elusive, or as merely a preliminary method to study predation across gradients. We argue that the greatest mistake ecologists have made …