Digital Commons Network^™

Dynamics Of Adsorbed Pma-D₃ - Effect Of Substrate, Frank D. Blum, Burak Metin, Macduff O. Okuom

Chemistry Faculty Research & Creative Works

In the last few years, our group has focused much of our attention on studying the dynamics of polymers adsorbed at interfaces. Much of our work, to date has been on labeled poly(vinyl acetate)-d3 (PVAc-d3)1 and poly(methyl acrylate)-d3 (PMA-d3)2 on silica. We have been able to probe the effects of adsorbed amount,3 molecular mass,4,5 and the effect of overlayer.6 These studies have provided a view of the adsorbed polymer consistent with a motional gradient in the layer with the more mobile segments being those at the air-polymer interface and the less-mobile segments at the substratepolymer interface. However, we have not …

Dynamics Of Pipa-D₇ On Silica Surface, Piyawan Krisanangkura, Frank D. Blum

Chemistry Faculty Research & Creative Works

Molecular motion of polymer chains is an important determinant in understanding the physical properties of polymeric materials. Glass transition temperature (Tg) is a physical property of polymers, which is of primary interest. The study of the dynamics of polymer segments assists in understanding the dependence of Tg on polymer structure.1 For decades, studies have addressed the molecular motion in various polymers. Some of them have probed the dynamics of polymer backbones.2,3 the properties of a polymer at an interface may change because of the type of polymer, the substrate, or other variables. The side chain of a polymer can also …

Design Stability For Concept Selection, Vivek K. Jikar, Kenneth M. Ragsdell

Engineering Management and Systems Engineering Faculty Research & Creative Works

This paper re-visits the concept of Design Stability proposed earlier. It further develops a new metric called the Design Stability Coefficient for use in the concept selection stage during early phases of new product development. Design Stability Coefficient is analyzed qualitatively as well as quantitatively and developed as an objective criterion for selecting the best alternative for realizing high value for the end-user of a product. a Wheatstone Bridge is used as an example to indicate a procedure for computing the Design Stability Coefficient. Calculated values are compared with the Nominal the Best signal to noise ratio. Copyright © 2008 …

Dual-Polarized Near-Field Microwave Reflectometer For Noninvasive Inspection Of Carbon Fiber Reinforced Polymer-Strengthened Structures, Sergey Kharkovsky, Adam C. Ryley, Vivian Stephen, R. Zoughi

Electrical and Computer Engineering Faculty Research & Creative Works

Carbon fiber reinforced polymer (CFRP) composites are increasingly being used to strengthen various components of civil, aerospace, and automotive infrastructures. Subsequent to the application of CFRP, evaluation of the structural integrity of the strengthened members becomes a critical issue. Microwave noninvasive inspection techniques have been successfully used for this purpose. To this end, a novel near-field microwave inspection system that employs a dual-polarized reflectometer for detecting defects, such as disbonds between CFRP laminates and strengthened structures, was developed. It is shown that this system is capable of automatic removal of the influence of undesired standoff distance (or surface roughness) variations. …

Extension Of The Poiseuille Formula For Shear-Thickening Materials And Application To Self-Compacting Concrete, Dimitri Feys, Ronny Verhoeven, Geert De Schutter

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

In Practice, While Placing Concrete in a Formwork by Pumping, the Pressure Generated by the Pump is Not Controlled. in Order to Enhance the Safety on the Worksite, and in View of the Current Economic and Ecologic Arguments, It Would Be Useful to Dispose of an Equation Able to Predict Pressure Losses based on the Rheological Properties of the Concrete and the Pipe Configuration. This Paper Describes the Derivation of an Extended Version of the Poiseuille Formula, for Shear-Thickening Materials with a Yields Stress, Described by the Modified Bingham Equation. This Formula is Applied to Flow-Tests with Self-Compacting Concrete. the …

Improved Bdfe Using A Priori Information For Turbo Equalization, Jingxian Wu, Sang-Yick Leong, Kah-Ping Lee, Chengshan Xiao, Jan C. Olivier

Electrical and Computer Engineering Faculty Research & Creative Works

Turbo equalization improves communication system performance by iteratively exchanging information between soft-input soft-output (SISO) equalizer and SISO channel decoder. The trellis-based maximum a posteriori probability (MAP) algorithm serves as the optimum SISO equalizer for turbo equalization. However, MAP algorithm is unsuitable for systems with large modulation constellation size and severe inter-symbol interference (ISI) due to its prohibitively high computational complexity. In this paper, an improved SISO block decision feedback equalizer (BDFE) is proposed for low complexity turbo equalization. Unlike other sub-optimum equalizers which perform symbol by symbol detection, the proposed equalizer generates the soft output for each data bit by …

Multiple-Input Multiple-Output Rayleigh Flat Fading Outage Capacity Using Channel Estimation, Chris G. Potter, Kurt Louis Kosbar, Adam Panagos

Electrical and Computer Engineering Faculty Research & Creative Works

Upper and lower bounds on the outage capacity for a multiple-input multiple-output (MIMO) Rayleigh flat fading wireless baseband communication environment are derived for the case when the channel is completely unknown at the transmitter and the receiver has access to channel state information (CSI) via pilot estimation. The bounds show that the channel estimation error significantly impacts the outage capacity. A change in the outage probability is also shown to have a larger impact on the outage capacity when the channel estimation error is small. To get an idea of how these bounds are affected by a temporally correlated channel, …

Characterization And Glass Formation Of Jsc-1 Lunar And Martian Soil Simulants, C. S. Ray, Sabhayu Sen, Signo Tadeu Dos Reis

Materials Science and Engineering Faculty Research & Creative Works

The space exploration mission of NASA requires human and robotic presence for long duration beyond the low earth orbit (LEO), especially on Moon and Mars. Developing a human habitat or colony on these planets would require a diverse range of materials, whose applications would range from structural foundations, (human) life support, (electric) power generation to components for scientific instrumentations. A reasonable and cost-effective approach for fabricating the materials needed for establishing a self-sufficient human outpost would be to primarily use local (in situ) resources on these planets. Since ancient times, glass and ceramics have been playing a vital role on …

Development Of Ballistic Limit Equations For Dual-Wall Spacecraft Shielding: A Concise History And Suggestions For Future Development, William P. Schonberg

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

All earth-orbiting spacecraft are susceptible to impacts by orbital debris particles, which can occur at extremely high speeds and can damage flight- and mission-critical systems. The traditional damage mitigating shield design for this threat consists of a “bumper” that is placed at a relatively small distance away from the main “inner wall” of the spacecraft. The performance of a hypervelocity impact shield is typically characterized by its ballistic limit equation, which is typically drawn as a line of demarcation between regions of rear-wall perforation and no perforation; when graphically represented, it is often referred to as a ballistic limit curve. …

Estimation Of Earthquake Loss Due To Bridge Damage In The St. Louis Metropolitan Area: Part I - Direct Losses, Ronaldo Luna, David J. Hoffman, William T. Lawrence

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The risk associated with earthquake hazards on highway systems is dependent on the complexity of a network and its redundancy in providing traffic flow. Earthquake loss estimation studies can provide decision makers with an appreciation of the importance of having a highway network resistant to earthquakes and information to make the network resistant to these events. The direct economic loss was estimated for a major metropolitan area, St. Louis, for a series of earthquake scenarios. The primary component of the study was damage to bridges within the highway system. The study zone covers the St. Louis metropolitan area and its …

A Comparison Of Alternating Minimization And Expectation Maximization Algorithms For Single Source Gamma Ray Tomography, R. Varma, S. Bhusarapu, J. A. O'Sullivan, M. (Muthanna) H. Al-Dahhan

Chemical and Biochemical Engineering Faculty Research & Creative Works

Lange and Carson (1984 J. Comput. Assist. Tomogr. 8 306-16) Defined Image Reconstruction for Transmission Tomography as a Maximum Likelihood Estimation Problem and Derived an Expectation Maximization (EM) Algorithm to Obtain the Maximum Likelihood Image Estimate. However, in the Maximization Step or M-Step of the EM Algorithm, an Approximation is Made in the Solution Which Can Affect the Image Quality, particularly in the Case of Domains with High Attenuating Material. O'Sullivan and Benac (2007 IEEE Trans. Med. Imaging 26 283-97) Reformulated the Maximum Likelihood Problem as a Double Minimization of an I-Divergence to Obtain a Family of Image Reconstruction Algorithms, …

Effect Of Hydrodynamic Multiplicity On Trickle Bed Reactor Performance, Werner Van Der Merwe, Willie Nicol, Muthanna H. Al-Dahhan

Chemical and Biochemical Engineering Faculty Research & Creative Works

Multiple Hydrodynamic States in Trickle Bed Reactors Have Been the Subject of Numerous Hydrodynamic Investigations. the Extent of Variation in the Hydrodynamic Parameters (Like Holdup and Pressure Drop) is Large and This Variation Can Be Expected to Have a Significant Impact on the Conversion in a Reaction System. This Study Presents Reaction Data for Α-Methyl Styrene Hydrogenation in a Trickle Bed Reactor over a Range of Conditions that Include Gas and Liquid Limitations. It is Seen that Liquid Flow Rate Variation Induced Hysteresis Has a Large Impact on the Conversion. for Gas-Limited Reactions, the Upper Branch of the Pressure Drop …

X-Ray Lithography Of Metal And Semiconductor Nanoparticles, Nicholas Leventis, Suchi Guha, Massimo F. Bertino, Raghuveer Reddy Gadipalli, Brian R. Heckman, John Katsoudas, Ralu Divan, Lane A. Martin, Derrick C. Mancini

Physics Faculty Research & Creative Works

In the last few years, a considerable amount of research has focused on the three-dimensional fabrication of contacts and electronic devices. Most techniques, however, are essentially based on photoreduction, and are limited to noble- and semi-noble metals. We present here a general method that allows patterning of porous matrices in 3D with metal, but also with semiconductor nanoparticles which is of potential relevance for microfabrication applications. In our method, the pore-filling solvent of a sol-gel material is exchanged with a solution of precursors. The precursors are photodissociated and nanoparticles are formed when the monoliths are irradiated. In a series of …

“She Called Me A Mexican!”: A Study Of Ethnic Identity, Simona Florentina Boroianu

Dissertations and Theses @ UNI

Ethnic identity is a dynamic construct whose conceptualization has raised ongoing controversy among researchers. It has been suggested that ethnic identity includes several components that can be examined individually or in combination.

The purpose of this paper is to study ethnic identity in Mexican-origin children, as one of the multifaceted aspects of the adaptation process that immigrant children experience in their transition to becoming a part of the United States' mainstream culture.

No formal assessment of ethnic identity in Mexican-origin children in Iowa has been conducted yet, therefore this study is meant to fill a gap and bring in knowledge …

Does Content Knowledge Matter In Scoring Teacher Work Samples?: A Study Of Rater Differences, Yana A. Cornish

Dissertations and Theses @ UNI

The study examines the role of rater characteristics in the assessment of teacher practice as presented in Renaissance Teacher Work Samples (RTWS). The study analyzed ratings of 10 teacher work samples submitted by teacher candidates at the University of Northern Iowa between Fall 2000 and Spring 2004. These teacher work samples, created in the area of Spanish language learning at 7-11 grade levels, were analyzed to determine the impact of content expertise, amount of teaching experience, and previous RTWS rating experience on reviewer's ratings. Three study questions form the foundation for the investigation:

(1) Is there a significant difference between …

A Journey Of Advising: Experiences Of Doctoral International Students And Faculty Advisors In The College Of Education At A Midwestern University, Madalina Florentina Tincu

Dissertations and Theses @ UNI

In the last five decades, higher education in the United States has faced a large influx of international students (Institute of International Education, 2004). However, a review of selected literature showed a paucity of research on faculty advising graduate international students. The literature pointed out that not all institutions were prepared to work with the international student population (Adrian-Taylor, Noels, & Tischler, 2007; Khabiri, 1985; Seeger, 1993) and that further investigation was needed in the area of faculty advising related to international students (Adrian-Taylor, et al.; Trice, 2003). Therefore, this study focused on the following research question: How do selected …

The Reflexivity Of Pain And Privilege: An Autoethnography Of (Mestizo) Identity And Other Mestizo Voices, Ellis Hurd

Dissertations and Theses @ UNI

Approximately 20 million Latinos living in the United States identify as Mestizos. A Mestizo is a person of mixed heritage. Almost half of these Mestizos racially or culturally identify as White, while the other half identify as Hispanic or racially mixed. These racial and cultural identifications have vast effects on educational performance: those identifying themselves as Hispanic or mixed experience lower academic achievement whereas those identifying as White do not. Many communities have experienced an influx of Mestizo-Latinos, but are ill prepared for the educational challenges due to the language and cultural differences Mestizos bring. This researcher himself has experienced …

Overview Of Biocreative Ii Gene Mention Recognition, Larry Smith, Lorraine K. Tanabe, Rie Johnson Nee Ando, Cheng-Ju Kuo, I-Fang Chung, Chun-Nan Hsu, Yu-Shi Lin, Roman Klinger, Christoph M. Friedrich, Kuzman Ganchev, Manabu Torii, Hongfang Liu, Barry Haddow, Craig A. Struble, Richard J. Povinelli, Andreas Vlachos, William A. Baumgartner, Lawrence Hunter, Bob Carpenter, Richard Tzong-Han Tsai, Hong-Jie Dai, Feng Liu, Yifei Chen, Chengjie Sun, Sophia Katrenko, Pieter Adriaans, Christian Blaschke, Rafael Torres, Mariana Neves, Preslav Nakov, Anna Divoli, Manuel Maña-López, Jacinto Mata, W John Wilbur

Electrical and Computer Engineering Faculty Research and Publications

Nineteen teams presented results for the Gene Mention Task at the BioCreative II Workshop. In this task participants designed systems to identify substrings in sentences corresponding to gene name mentions. A variety of different methods were used and the results varied with a highest achieved F₁ score of 0.8721. Here we present brief descriptions of all the methods used and a statistical analysis of the results. We also demonstrate that, by combining the results from all submissions, an F score of 0.9066 is feasible, and furthermore that the best result makes use of the lowest scoring submissions.

Integrating Eastern Philosophy Into Western Psychology: A Primer For Students Of Applied Psychology, Erica Hurley, Jennifer L. Callahan

Modern Psychological Studies

A review of undergraduate texts marketed as providing an introduction to clinical psychology located no chapters devoted to the emerging practice of integrating Eastern philosophy with Western psychological practices. Thus, this paper provides students with a primer of this important emerging area by reviewing cultural differences that challenge the successful integration of Eastern philosophy with Western psychology, before focusing specifically on Taoist philosophy and its implications for Western psychotherapy. The congruence of Taoism with the "common" factors of Western psychotherapy (i.e., those mechanisms of change thought to transcend theoretical psychotherapy orientation) will be discussed, as will congruence with "specific" cognitive …

Laboratory Schools Annual Report, 2007-2008, Laboratory Schools, Illinois State University

Annual Reports – Laboratory Schools

Illinois State University Laboratory Schools annual report

The Relationships Between Cyber And Non-Cyber Bullying And Depressive Symptoms Among Adolescents In Western Australia, Mitch J. Read

Theses : Honours

Much research has explored the nature, prevalence and impact that bullying behaviours have on children and adolescents. Correlations have been found between bullying behaviours and depression, suicidal ideation, anxiety, loneliness, psychosomatic symptoms and conduct disorders. With a rapid increase in the availability and use of information and communication technologies young people are now able to bully others in a relatively anonymous, removed fashion, often referred to as cyber bullying. This paper provides a review of the research that has investigated the nature, prevalence and impact of cyber and non-cyber bullying. The bullying literature highlights the negative consequences this behaviour often …

Resisting The Socialist Fetish, Shubhankar Dam

Research Collection Yong Pung How School Of Law

No abstract provided.

Biblical Hermeneutics, Glenn Pearl

Syllabus Repository

No abstract provided.

Biblical Exposition & Faith Integration, Robby Waddell Dr.

Syllabus Repository

No abstract provided.

Life Of Christ, William Hackett

Syllabus Repository

No abstract provided.

A Commitment To Excellence, Meredith Jones-Gray

Faculty Publications

No abstract provided.

Inventors, Entrepreneurs, And Intellectual Property Law, Michael J. Meurer

Faculty Scholarship

I am not sure why small business concerns have not had more influence on IP law. Perhaps the sentiment prevailing in antitrust law spilled over into IP law. American antitrust law has reached a near consensus that small firms get no special treatment under a law designed to protect competition, not competitors. ° In contrast, European competition law regulators are more likely to protect small business, and European patent policymakers openly fret about how to reform their patent law to promote small business.²

Regardless, my concern in this Article is mostly with the normative question: Should IP law favor …

The Legacy Of The Nuremberg Doctors' Trial To American Bioethics And Human Rights, George J. Annas

Faculty Scholarship

In this lecture I argue that modern bioethics was born at the Nuremberg Doctors' Trial, a health law trial that produced one of the first major human rights documents: the Nuremberg Code. Accepting this conclusion has significant consequences for contemporary American bioethics generally, and specifically in the context of our continuing global war on terror in which the United States uses physicians to help in interrogations, torture, and force-feeding hunger strikers.

The primary force shaping the agenda, development, and current state of American bioethics has not been either medicine or philosophy, but law, best described as health law. Like bioethics, …

A Watershed Moment: Reversals Of Tort Theory In The Nineteenth Century, Jed Handelsman Shugerman

Faculty Scholarship

This article offers a new assessment of the stages in the development of fault and strict liability and their justifications in American history. Building from the evidence that a wide majority of state courts adopted Fletcher v. Rylands and strict liability for unnatural or hazardous activities in the late nineteenth century, a watershed moment turns to the surprising reversals in tort ideology in the wake of flooding disasters.

An established view of American tort law is that the fault rule supposedly prevailed over strict liability in the nineteenth century, with some arguing that it was based on instrumental arguments to …

Vivum Excoriari, Kristina Marie Stafford

Theses

My inspirations for this body of sculpture are implements of torture and antique tools. I am interested in the relationship between historical value and psychological response; the push and pull of the terrible and beautiful. I am exploring the emotive substance of the objects by choosing implements that evoke an emotional and psychological response. I am obsessed with objects that crush, grasp, cut, constrict, and bind such as axes, meat hooks and, most recently, medieval torture devices. I find them simultaneously beautiful and unsettling. These objects express themselves so clearly as a threat through their form, allowing the viewers to …