Digital Commons Network^™

Silent Subjects: Silence In Theories Of Subjectivity, Nikki Ann Agee

Open Access Theses & Dissertations

Postmodern theories describe human subjectivity as fragmented. (Faigley 12). Unlike Enlightenment thinkers, who theorized the Cartesian subject as an autonomous, stable, rational self with "privileged insight into its own processes" (111), postmodern theorists "decisively [reject] the primacy of consciousness and instead [have] consciousness originating in language, arguing that the subject is an effect rather than a cause of discourse" (Faigley 9).

The idea that language constructs who subjects are, how they are, and who they may and may not become is very powerful, for it suggests subjects cannot consciously know themselves apart from language. Self-knowledge results from social, institutional, and …

Hybrid Method: Algebraic/Inverse Radon Transform For Region Of Interest Reconstruction Of Computed Tomography Images, Marco A. Barrera

Open Access Theses & Dissertations

Computed tomography is one of the most rapidly advancing method in modern medical imaging, because of is relatively low cost and outstanding quality. The main shortcoming of the method is the relatively high dose of radiation used. Consequently, considerable efforts have been made to obtain good image reconstructions from fewer projections or from using lower intensity beams (hence, noisier data). It has been known for decades that a scan with high intensity beams and large number of projections (typically, 180-360 for a planar image) will lead to a very good image reconstruction via an Inverse Radon Transform (IRT), but the …

Temperature-Induced Phenomena In Systems Of Magnetic Nanoparticles, Abdul Wazed Bhuiya

Open Access Theses & Dissertations

Magnetic nanoparticle ensembles have received a lot of attention, stemming in part from their current and potential applications in biomedicine and in the development of high-density magnetic storage media. Key to the functionality of these systems are microscopic structures and mechanisms that make them exhibit unique properties and behave differently from their bulk counterparts.

We studied microscopic structures and processes that dictate macroscopic properties, behavior and functionality of magnetic nanoparticle ensembles. As the temperature T strongly influences the magnetic behavior of these systems, we studied temperature dependent magnetic properties using AC-susceptibility and DC-magnetization measurements carried out over a broad range …

Two-Dimensional Gravity Modeling Of The Rattlesnake Springs Watershed, Carlsbad Caverns National Park, New Mexico, Nikolay D. Boykov

Open Access Theses & Dissertations

A series of non-invasive geophysical investigations at the Rattlesnake Springs part of Carlsbad Caverns National Park, New Mexico, were performed in an effort to better delineate the watershed of the springs. The goal of this project is to determine possible locations of fractures and faults that may control the distribution of groundwater that feeds Rattlesnake Springs. Once the water flow paths are identified, the park will be able to better protect Rattlesnake Springs from environmental hazards, such as oil and gas drilling, as well as from upstream water development. As part of this effort I conducted a precision gravity survey …

An Investigation Of Cognitive And Non-Cognitive Variables That Affect Student-Athlete Graduation And Retention, Lisa Diana Campos

Open Access Theses & Dissertations

Colleges and universities continue to be held to accountability measures typically related to student graduation rates. Intercollegiate athletic programs are not immune to such accountability measures. For instance, in recent years the National Collegiate Athletic Association adopted the Academic Progress Rate, which holds institutions accountable for the graduation, retention, and eligibility status of its student-athletes. It is the moral obligation of intercollegiate administrators to ensure student-athletes are receiving a quality education culminating in graduation. The recent climate of higher education makes it critical to examine the variables which influence graduation and retention of student-athletes.

This study examined student-athletes who entered …

“In The Shadow Of A Concrete Forest”: Transportation Politics In Portland, Oregon, And The Revolt Against The Mount Hood Freeway, 1955-1976, Val C. Ballestrem

Dissertations and Theses

In 1955, The Oregon State Highway Department helped usher in the freeway building era in Portland by publishing its plan for 14 modern freeways designed to crisscross the city. A major component of that report was the Mount Hood Freeway, a route designed to pass through southeast Portland, connecting the city to its expanding eastern suburbs. Other freeway routes in the Portland area were given precedence over the Mount Hood Freeway and by 1969, when the route obtained federal interstate status, urban freeways across the nation had become highly controversial. Over the next seven years a struggle ensued pitting those …

Health Prognisis Of Electronics Via Power Profiling, Jonathan Amilcar Cervantes

Open Access Theses & Dissertations

The objective of this research is to investigate a new approach for the early detection of latent defects in electronic devices in the field. Reliability is assessed through the non-traditional approach of recording and evaluating the power profile of electronic devices within a deterministic state of operation. Traditionally, measuring the quiescent current (Iddq) of a device has been employed in manufacturing tests to detect defective parts prior to deployment to the field. However, the monitoring of the deterministic power signature (i.e. boot up or during a self-test routine) has never been exploited to monitor the health of a device in …

Magnitude Of Right-Lateral Offset On The Southern Death Valley Fault Zone From Miocene Volcanic Assemblages, Sabrina Michelle Canalda

Open Access Theses & Dissertations

In this study correlation of Miocene volcanic and sedimentary rocks in southern Death Valley is used to constrain the total amount of slip on the southern Death Valley fault. The tertiary volcanic section near Ibex Pass is correlated to rocks ~35 km to the northwest, in the Wingate Wash region (Luckow et al., 2005). Geochronology by Luckow et al. (2005) in Wingate Wash and the Owlshead Mountains has the region divided into two basic periods: an early interval (~14-13.4Ma), and a later phase (~13-12.5Ma). One date from the volcanic sequence in Ibex Pass has been reported (Calzia, 2000) suggesting that …

The Effectiveness Of Fba-Based Interventions On Social Goals And Behaviors Of A Student At Risk Of E/Bd, Hsin-Ju Chen

Open Access Theses & Dissertations

The purpose of this study was to examine the effectiveness of functional behavioral assessment (FBA) based interventions for improving prosocial goals and behaviors and reducing problem behaviors of a student at risk of emotional and behavioral disorders (E/BD). Specifically, this study was interested in whether the behavioral intervention plans based on the function of behavior had an impact on the student's thought processes impacting prosocial decision making. There was one 11-year-old student who was placed in the behavior intervention class (BIC) participating in this study. Results showed that overall, the student's problem behaviors seemed to decrease during the classroom universal …

Does Type Of Stimulus Influence Task-Irrelevant Evaluative Categorization Processes?, Guadalupe Corral

Open Access Theses & Dissertations

The effect of stimulus type on task-irrelevant evaluative categorization was examined in two separate studies by using the P3 component from event-related brain potentials. The first study presented idiosyncratic stimuli consisting of individuals that were rated by participants as either positive or negative within sequences of pictorial and verbal stimuli. The second study presented sequences of novel and familiar stimuli consisting of previously normed unattractive and neutral individuals. It was hypothesized that pictures would elicit task-irrelevant evaluative categorization processes and so would novel stimuli (relative to words and familiar stimuli, respectively). Task-irrelevance was examined by assessing P3 peak amplitude to …

It's Bigger And Hip-Hop: Richard Wright, Hip-Hop, And Masculinity, Marcos Julian Del Hierro

Open Access Theses & Dissertations

In Native Son, Richard Wright presents a view of the impoverished, inner-city from an insider's perspective, which reflects the anger and hate brewing towards the rest of the nation as a result of living under harsh, isolating conditions. Wright's main character, Bigger Thomas serves as an archetypal ghetto figure both in his attitudes and the treatment he receives from Anglo Americans. Additionally, the reception of Native Son by a majority white reading audience also reflected the voyeuristic thrill of the bourgeoisie when consuming cultural products by African Americans. The selection of Wright's novel into the Book of the Month …

The Pluvial Lake Palomas - Samalayuca Dunes System, Miguel Dominguez Acosta

Open Access Theses & Dissertations

A lacustro-aeolian system formed by the Pluvial Lake Palomas (PLP), the Samalayuca Dunes (SMD) and a connecting aeolian corridor is found in the central Chihuahuan Desert of North America approximately 50 km upwind (SW) of the binational Paso del Norte metroplex. The system is described by its three individual components. They comprise one of the largest paleo-lacustrine (Pleistocene) environments in the Chihuahuan Desert (PLP), one of the largest and least-studied sand seas of North America (SMD), and a newly described and geomorphically heterogeneous aeolian corridor connecting the two.

The Chihuahuan Desert has been a major and underappreciated dust production region …

Characterization Of A Mems Accelerometer For A Highway Health Monitoring Ultra-Low Power Sensor, Karla Cecilia Enriquez

Open Access Theses & Dissertations

With the 2009 American Recovery and Reinvestment Act, government officials recognized the need to implement automated methods that reduce the cost of assessment projects and provide a long-term solution to monitor the structural health of bridges and highways. Although important research exists in the area of non-destructive evaluation, current road health monitoring efforts continue to be costly and time consuming. This Thesis focuses on the characterization of a MEMS accelerometer intended to be the basis of a novel ultra-low power sensing system to remotely asses the condition of highways. The architecture of a sensor prototype built to validate an algorithm …

Appropriate Prosodic Variation Is Valued By Users, Rafael Escalante-Ruiz

Open Access Theses & Dissertations

Spoken dialog systems today do not vary the prosody of their utterances, although prosody is known to have many useful expressive functions. In a corpus of memory quizzes, I identified eleven dimensions of prosodic variation, each with its own expressive function. I identified the situations in which each was used, and how to detect these situations from the dialog context and the prosody of the interlocutor's previous utterance. I implemented the resulting response rules and had 21 users interact with two versions of the system. Overall they preferred the version in which the prosodic forms of the acknowledgments were chosen …

Suswa Volcano, Kenya Rift: Evidence Of Magma Mixing, Na-F Complexing And Eruptions Triggered By Recharge, Vanessa Veronica Espejel Garcia

Open Access Theses & Dissertations

The Cenozoic East African rift system (EARS) is a sequence of grabens, intraplate transforms, accommodation zones, and abundant magmatism. The Central Kenya Peralkaline Province (CKPP) includes a variety of volcanic rocks -trachyte, pantellerite, comendite, phonolite, trachy-basalt, basaltic trachy-andesite, and basalt- which erupted from volcanoes including: Mount Kenya; Eburru and the Greater Olkaria volcanic complexes; Longonot, Menengai, and Suswa volcanoes; and Ndabibi, Elmenteita, and Tandamara mafic volcanic fields. Only two of the volcanoes, Mount Kenya (on the flank of the central graben) and Suswa (the southernmost of the CKPP volcanoes), have phonolites as part of their assemblage.

The evolution of Suswa …

Sustainable Development Extension Plan (Sudex): Community Mobilization Through Proactive Participation And Synergistic Alliance To Alliviate Poverty And Achieve Sustainable Self Sufficiency, Stephen Forbes

Open Access Theses & Dissertations

This Dissertation describes a sustainable development extension plan (Sudex Plan) to help communities in developing countries achieve Goal 1 of the United Nation's Millennium Development Goals (MDG). Goal 1 focuses on reducing poverty and hunger by 50% by the year 2015, but all the MDG are interrelated and one can not be achieved without considering the others, and to attain any is an empty accomplishment without ways to ensure that they can be sustained and continuously improved with the means to pass on the information, knowledge and lessons learned from community to community, generation to generation. The Sudex Plan is …

Three Essays On Chinese Outward Investment, Yan Gao

Open Access Theses & Dissertations

Empirical research and theory development have traditionally focused on Western MNEs. The rise of multinational firms from the emerging markets, particularly MNEs from China has attracted limited empirical research attention. In the current research, I attempt to fill this gap by exploring the entry modes strategies, motivation and government interference when Chinese MNEs go abroad. Early international business theories suggested that firms invest abroad on the basis of possessing certain-firm specific competitive advantages. By leveraging these existing firm-specific advantages overseas, firms are able to generate sufficient returns to overcome the "liability of foreignness". These early FDI theories were largely based …

Top Management Team Heterogeneity, Global Strategic Posture, And Firm Performance: Evidence From Mnes Headquartered Around The World, Adrian Gil

Open Access Theses & Dissertations

This study empirically examines the relationship between top management team (TMT) heterogeneity and firm performance for a sample of multinational enterprises (MNEs) headquartered in 31 countries from across the globe. Utilizing the theoretical perspectives of upper echelons (Hambrick & Mason, 1984) and information processing (Daft, Bettenhausen, & Tyler, 1993; Galbraith, 1973), I hypothesize that global strategic posture, a measure of the intensity of a firm's involvement in the multinational business environment, moderates the relationships between TMT heterogeneity and firm performance. My findings reveal an "enhancing" interaction (Cohen, Cohen, West, & Aiken, 2003: 285-286) between the different TMT heterogeneities investigated and …

Insight Into The Physics Of Rupture: Dynamic Triggering Seismicity, Hector Gonzalez-Huizar

Open Access Theses & Dissertations

Seismic waves can trigger earthquakes and tremor at large distances from the causable event. Dynamic triggering occurs when the surface waves from large earthquakes change the stresses conditions on previously overstressed faults, promoting failure. To understand the causative stresses and environments behind dynamic triggering, we model the change in the stress field that the passing of Rayleigh and Love waves cause on a fault plane of arbitrary orientation relative to the direction of propagation of the waves, and apply a Coulomb failure criterion to calculate the potential of these stress changes to trigger seismicity. We apply our model to three …

Assistive Technology As A Cognitive Developmental Tool For Students With Learning Disabilities Using 2d And 3d Computer Objects, Felipe D. Guevara

Open Access Theses & Dissertations

This study presented a theory in which assistive technology and body kinesthetic helped students understand concepts taught in the regular education classroom. The study included students already identified and diagnosed with a learning disability (LD). The research is based on cognitive theories that state that cognitive development could use alternative representation to have a deeper impact in the way Students with LD process information by activating different parts of the brain that are involved in the learning process. The study included students from 9th thru 12th grades. Students were selected from the ones receiving services from the special education department …

Identification Of Human Gait Using Genetic Algorithm Tuned Fuzzy Logic, Abdallah Abdel-Rahman Hassan Mahmoud

Open Access Theses & Dissertations

Data mining is concerned with the discovery of useful hidden information in large databases. Classification is a data mining task producing rules in which a set of attributes in data predict the value of a class attribute. Classifiers usually produce a large number of rules, most of which are not interesting to the user. Rule interestingness is a decisive factor. However, evaluating rule interestingness is challenging as it involves both objective (data-driven) and subjective (user-driven) aspects.

In this research, a fuzzy genetic algorithm is proposed to discover classification rules that are both accurate and interesting. Continuous attributes are fuzzified so …

Student Price Response: The Effect Of Tuition Deregulation In Texason Student Enrollment Trends In Texas Public Institutions Of Higher Educaiton, Jose Carlos Hernandez

Open Access Theses & Dissertations

This study examined the relationship between cost of attendance price increases in Texas public higher education institutions and enrollment. This study compared enrollment trends prior to and post deregulation of tuition setting authority in the State. The study focused on first-time full-time state-wide enrollment of all students and Hispanic students, and also analyzed enrollment trends at institutions located along the U.S./Mexico border and non-border for the same grouping of students. Enrollment behavior was tested for statistical significance to cost of attendance for all aforementioned geographic areas and student groups. A simple linear regression of pre-deregulation was used to predict enrollment …

Comparison Of Older Mexican American Upper Extremity Reach Capabilities To Older Anglo Americans, Odi Mike Ikpe

Open Access Theses & Dissertations

The study aimed to investigate if there are upper extremity reach capability differences in older Mexican Americans and older Anglo Americans. The subjects were recruited and corresponded to the 2000 census track. Upper extremity reach capability was determined by analysis of 20 range of motion variables. A MANOVA analysis utilizing SPSS software was performed with age, gender and ethnicity as independent variables while height and 20 range of motion anthropometric measurements servings as dependent variables (responses). Ethnicity as a function of age was found to be significant in height, horizontal distance from buttock to hand, rotation of head to the …

Directional Analysis And Filtering For Dust Storm Detection In Noaa-Avhrr Imagery, Swapna Janugani

Open Access Theses & Dissertations

In this research, we propose spatio-spectral processing techniques for the detection of dust storms in 5-band NOAA-AVHRR imagery. The research is mainly focused on locating the dust sources and automatically finding the transport direction of the dust storm. Previous methods that use simple band math analysis have produced promising results but have some drawback in producing consistent results when low SNR images are used. Moreover, in seeking to automate the dust storm detection, the presence of clouds in the vicinity of the dust storm creates a challenge in being able to distinguish these two types of image texture. Our research …

Reduced Dimensionality Hyperspectral Classification Using Finite Mixture Models, Vikram Jayaram

Open Access Theses & Dissertations

Classification of HSI data is a challenging problem for two main reasons. First, with limited spatial resolution of HSI sensors and/or the distance of the observed scene, the images invariably contain pixels composed of several materials. It is desirable to resolve the contributions of the constituents from the observed image without relying on high spatial resolution images. Remote sensing cameras have been designed to capture a wide spectral range motivating the use of post-processing techniques to distinguish materials via their spectral signatures. Secondly, available training data for most pattern recognition problems in HSI processing is severely inadequate. Under the framework …

Riding The Borderlands: The Negotiation Of Social And Cultural Boundaries For Rio Grande Valley And Southwestern Motorcycling Groups, 1900-2000, Gary L. Kieffner

Open Access Theses & Dissertations

This Dissertation presents an analysis and interpretation of particular aspects of the social, cultural, and ideological history of motorcycling in the US-Mexican Borderlands from 1900 to 2000. It is based on interviews with historical correspondents, archival and other documents as well as thirty years of participant reflection during which the author was immersed in biker culture. The motorcycle served as a vehicle for personal and group identity, resistance, and liberation. Issues related to identity, gender, race, marginalization and resistance, imagery, and rhetoric become clearer when considering the perspective of riders. This study surveys interactive processes that occurred between historic motorcyclists, …

The Distinctiveness Effect In Fingerprint Identification: How The Role Of Distinctiveness, Information Loss, And Informational Bias Influence Fingerprint Identification, Jessica L. Marcon

Open Access Theses & Dissertations

Fingerprint misidentification has become a concern for legal professionals, especially after the high profile misidentification of Brandon Mayfield as the Madrid train bomber and the first fingerprint related DNA exoneration of Stephen Cowans. The current studies examined how humans perceive the distinctiveness of fingerprints, whether distinctiveness effects found in face perception research are evident in fingerprint identification, and whether there are conditions under which the distinctiveness effect can be eliminated. Experiment 1 examined the distinctiveness effect and information loss, while Experiment 2 investigated the distinctiveness effect and its interaction with information loss and informational bias. In Experiment 1, results showed …

Spatio-Temporal Ecg Analysis For Localization Of Arrhythmias Using Precordial Ecg Leads And 128-Lead Systems, Eduardo Morales

Open Access Theses & Dissertations

A novel and state-of-the-art approach for the analysis of cardiac arrhythmias is proposed. Currently, the analysis of the electrocardiogram is only performed in the time-domain. The proposed method improves the electrocardiogram analysis by adding spatial properties. The spatial properties added to the electrocardiogram allow for the analysis of specific regions inside the human heart where cardiac arrhythmias are suspected to have occurred. In this Dissertation, the concept of electrocardiography was extended using advanced bioelectromagnetism theory. In concrete, the multiple dipole model of the human heart was used to extend the concept of electrocardiography from a temporal analysis to a spatial-temporal …

The Effects Of Psychopathy And Machiavellianism On Cognitive Dissonance, Ashley Anne Murray

Open Access Theses & Dissertations

Psychopathic traits include a lack of guilt, a lack of remorse, callousness and antisocial behaviors such as impulsivity and aggression. The current study examined the effects of psychopathic traits as measured by the Psychopathic Personality Inventory - Revised: Short Form (PPI-R: SF; Lilienfeld & Widows, 2005) and the Levenson Primary and Secondary Psychopathy Scales (LPSP; Levenson, Kiehl, & Fitzpatrick, 1995), and of Machiavellianism (MACH), as measured by the MACH-IV (Christie & Geis, 1970), on cognitive dissonance in a sample of 164 participants. The induced compliance paradigm of cognitive dissonance was implemented by instructing each participant to complete a boring task …

Characterization Of The Behavioral And Neurochemical Effects Of Nicotine Withdrawal In Adolescent And Adult Rats., Luis Alberto Natividad

Open Access Theses & Dissertations

Previous studies have demonstrated that the behavioral effects of nicotine withdrawal are lower in adolescent versus adult rats. However, the neurochemical mechanisms that mediate these developmental differences are presently unclear. Much work has shown that nicotine reward is mediated via enhanced dopamine neurotransmission in the mesolimbic pathway which originates in the ventral tegmental area (VTA) and terminates in several forebrain structures including the nucleus accumbens (NAcc). More recently, studies have shown that nicotine withdrawal produces a decrease in NAcc dopamine transmission, an effect that is believed to serve as a neurochemical marker of withdrawal in adult rodents. The goal of …