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The Art-Union and Photography, 1839-1854: The First Fifteen Years of Critical Engagement between Two Cultural Icons of Nineteenth-Century Britain (open access)

The Art-Union and Photography, 1839-1854: The First Fifteen Years of Critical Engagement between Two Cultural Icons of Nineteenth-Century Britain

This study analyzes how the Art-Union, a British journal interested only in the fine arts, approached photography between 1839 and 1854. It is informed by Karl Marx’s materialism-informed commodity fetishism, Gerry Beegan’s conception of knowingness, Benedict Anderson’s imagined community, and an art critical discourse that was defined by Roger de Piles and Joshua Reynolds. The individual chapters are each sites in which to examine these multiple theoretical approaches to the journal’s and photography’s association in separate, yet sometimes overlapping, periods. One particular focus of this study concerns the method through which the journal viewed photography—as an artistic or scientific enterprise. A second important focus of this study is the commodification of both the journal and photography in Britain. Also, it determines how the journal’s critical engagement with photography fits into the structure and development of a nineteenth-century British social collectivity focused on art and the photographic enterprise.
Date: August 2011
Creator: Boetcher, Derek Nicholas
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Assessing Student Critical Thinking Skills in Single Library Instruction Class

Presentation for the 2011 Phoenix Staff Development Day discussing how to assess the critical thinking skills of students in single library instruction classes. The challenges and solutions are discussed, as well as a recommendation for, and example of, a library instruction worksheet that can be used.
Date: May 27, 2011
Creator: Byerly, Gayla
Object Type: Presentation
System: The UNT Digital Library

Assessing the Usage of Electronic Theses and Dissertations: An Overview of ETD Statistics and Metrics in the UNT Libraries

Presentation for the 2011 Texas Electronic Thesis and Dissertations (ETDs) Association Annual Conference. This presentation gives an overview of ETD statistics and metrics in the UNT Libraries.
Date: March 31, 2011
Creator: Alemneh, Daniel Gelaw & Phillips, Mark Edward
Object Type: Presentation
System: The UNT Digital Library
Assessment and Treatment of Multiple Topographies of Self-injury Maintained by Separate Reinforcement Contingencies (open access)

Assessment and Treatment of Multiple Topographies of Self-injury Maintained by Separate Reinforcement Contingencies

Functional analysis procedures were used to assess and treat multiple topographies of self-injurious behavior exhibited by an individual. An experimental functional analysis indicated that one topography, hand biting, appeared to be maintained by social positive reinforcement in the form of delivery of tangible items. The analysis also provided evidence that a second form of self-injury, skin picking, was automatically reinforced. To treat positively reinforced hand biting, access to a preferred tangible was arranged contingent on the omission of biting for a prespecified time interval. Hand biting was nearly eliminated, and low rates were maintained as the schedule of reinforcement was thinned to 10 min. Competing stimulus assessments identified that magazines effectively suppressed all occurrences of skin picking; therefore, noncontingent access to magazines was implemented. Using a combination of multielement and multiple baseline designs, we were able to demonstrate that the two topographies of self-injury were maintained by independent reinforcement contingencies and that interventions corresponding to each topography and function effectively treated both behaviors.
Date: August 2011
Creator: Pace, Amy
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Assessment of Feigning with the Trauma Symptom Inventory: Development and Validation of new Validity Scales with Severely Traumatized Patients (open access)

Assessment of Feigning with the Trauma Symptom Inventory: Development and Validation of new Validity Scales with Severely Traumatized Patients

Currently, only the TSI assesses complex traumatic reactions and patient response styles. However, its feigning scale, ATR, uses a flawed detection strategy and is potentially confounded by experiences of complex PTSD. As a consequence, clinicians using the TSI to evaluate severely traumatized patients have no useful method for discriminating genuine and feigned responding. Several detection strategies have demonstrated utility within evaluations of feigned trauma including the assessment of rare symptoms, symptom combinations, symptom selectivity, and symptom severity. The current study created scales on the TSI according to these strategies using a development sample of 107 severely traumatized patients. Validation of all TSI feigning scales was then performed with a second independent sample of 71 severely traumatized patients using a mixed simulation design. Results found support for each scale's convergent validity with SIRS primary scales (M rs = .52) and discriminant validity with measures of defensiveness on the SIRS (M rs = -.07) and TSI (M rs = -.19). Each scale also produced expectedly mild to moderate relationships with SADS-C clinical scales (M rs = .32) and the SCID-IV PTSD module (M rs = -.02). Support for their criterion validity was only moderate (M ds = .69) when comparing the scores …
Date: May 2011
Creator: Payne, Joshua W.
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Assessment of Library Support for Distance Learning at UNT

Presentation for the 2011 American Library Association Annual Conference discussing assessments of library support for distance learning at the University of North Texas (UNT). The methods used include LibQUAL+ surveys, focus groups, and ethnographic studies.
Date: June 27, 2011
Creator: Wahl, Diane
Object Type: Presentation
System: The UNT Digital Library
Assessment of Transportation Emissions for Ferrous Scrap Exports from the United States: Activity-Based Maritime Emissions Model and Theoretical Inland Transportation Model. (open access)

Assessment of Transportation Emissions for Ferrous Scrap Exports from the United States: Activity-Based Maritime Emissions Model and Theoretical Inland Transportation Model.

Industrial ecology is a field of study that encourages the use of closed-loop material cycles to achieve sustainability. Loop closing requires the movement of materials over space, and has long been practiced in the iron and steel industry. Iron and steel (ferrous) scrap generated in the U.S. is increasingly exported to countries in Asia, lengthening the transportation distance associated with closing the loop on the iron and steel life cycle. In order to understand the environmental cost of transporting this commodity, an activity-based maritime transportation model and a theoretical in-land transportation model are used to estimate emissions generated. Results indicate that 10.4 mmt of total emissions were generated, and emissions increased by 136 percent from 2004 to 2009. Increases in the amount of emissions generated are due to increases in the amount of scrap exported and distance it is transported.
Date: December 2011
Creator: Caldwell, Amanda
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Attracted to the Medium: An Analysis of Social Behaviors, Advertising, and Youth Culture in the Emerging Mobile Era (open access)

Attracted to the Medium: An Analysis of Social Behaviors, Advertising, and Youth Culture in the Emerging Mobile Era

This thesis is a reception study that examines potential reasons why the adolescent to college aged demographic of youth culture is embracing communicative and informational mobility. The project attests that the move to mobility is motivated by two major factors, the attraction of being an early adopter of technology and the way social behaviors are made attractive in mobile marketing. Chapter 1 explores the importance of these social behaviors, as they are very much intertwined and contribute to how youth acclimate into society. Chapter 2 demonstrates that creating social distinction and cultural capital is linked to being an early adopter of technology. The remaining portion of the document examines recent mobile advertisements and why youth would be attracted to the aesthetic and thematic elements contained in the advertisements. Chapter 3 examines how Blackberry utilizes the behavior of creating and expressing identity in their advertisements. Chapter 4 focuses on how Apple has worked to create a community centered around their brand. Finally, Chapter 5 looks at how Google/Android has highlighted the acquisition, sharing, and utilization of content through the phenomenon of applications. With this project, I hope to illustrate the rationale why youth would be attracted to communicative and informational mobility.
Date: August 2011
Creator: Battin, Justin M.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Audit and Certification of Trustworthy Digital Repositories: Recommended Practice, Issue 1 (open access)

Audit and Certification of Trustworthy Digital Repositories: Recommended Practice, Issue 1

This document is a technical Recommendation to use as the basis for providing audit and certification of the trustworthiness of digital repositories. It provides a detailed specification of criteria by which digital repositories shall be audited. The OAIS Reference Model contained a roadmap which included the need for a certification standard. The initial work was to be carried out outside CCSDS and then brought back into CCSDS to take into the standard. In 2003, Research Libraries Group (RLG) and the National Archives and Records Administration (NARA) created a joint task force to specifically address digital repository certification. That task force published Trustworthy Repositories Audit & Certification: Criteria and Checklist (TRAC—reference [B3]), on which this Recommended Practice is based. Through the process of normal evolution, it is expected that expansion, deletion, or modification of this document may occur. This Recommended Practice is therefore subject to CCSDS document management and change control procedures, which are defined in the Procedures Manual for the Consultative Committee for Space Data Systems. Current versions of CCSDS documents are maintained at the CCSDS Web site: http://www.ccsds.org/
Date: September 2011
Creator: CCSDS Secretariat, Space Communications and Navigation Office, 7L70
Object Type: Book
System: The UNT Digital Library
Automatic Extraction of Highlights from a Baseball Video Using HMM and MPEG-7 Descriptors (open access)

Automatic Extraction of Highlights from a Baseball Video Using HMM and MPEG-7 Descriptors

In today’s fast paced world, as the number of stations of television programming offered is increasing rapidly, time accessible to watch them remains same or decreasing. Sports videos are typically lengthy and they appeal to a massive crowd. Though sports video is lengthy, most of the viewer’s desire to watch specific segments of the video which are fascinating, like a home-run in a baseball or goal in soccer i.e., users prefer to watch highlights to save time. When associated to the entire span of the video, these segments form only a minor share. Hence these videos need to be summarized for effective presentation and data management. This thesis explores the ability to extract highlights automatically using MPEG-7 features and hidden Markov model (HMM), so that viewing time can be reduced. Video is first segmented into scene shots, in which the detection of the shot is the fundamental task. After the video is segmented into shots, extraction of key frames allows a suitable representation of the whole shot. Feature extraction is crucial processing step in the classification, video indexing and retrieval system. Frame features such as color, motion, texture, edges are extracted from the key frames. A baseball highlight contains certain …
Date: May 2011
Creator: Saudagar, Abdullah Naseer Ahmed
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Backflow: A Collection (open access)

Backflow: A Collection

This collection consists of a critical preface and nine essays. The preface analyzes, first, how the imagination influences the personal journey of a writer, and second, the techniques authors use, mainly form, time, and space, to enact the imagination and propel the reader into an imagined narrative. The essays explore themes of loss, mental illness, the rift between the “real” and the “imagined” life, and the intangibility of memory itself. Collection includes the essays “Into the Snow,” “No Longer a Part,” “Borderland,” “Still Wounds,” “What Stays in Las Vegas,” “Remnants,” “The Root,” “Your Father,” and “The Land Lord.”
Date: May 2011
Creator: Kullberg, Adam
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Baroque Elements In The Piano Sonata, Opus 9 By Paul Creston (open access)

Baroque Elements In The Piano Sonata, Opus 9 By Paul Creston

Paul Creston (1906-1985) was one of the most significant American composers from the middle of the twentieth century. Though Creston maintained elements of the nineteenth-century Romantic tradition and was categorized as a “Neo-Romantic” or “20th-century traditionalist,” many of Creston’s compositions contain elements of Baroque music. His Piano Sonata, Opus 9 provides significant examples of Baroque elements, while already foreshadowing his mature style. The purpose of this study is to explore Baroque elements in the compositional language of Paul Creston’s Piano Sonata, Opus 9. All four movements of the Piano Sonata will be examined in regards to its stylistic features associated with Baroque practices. These features mainly consist of rhythm, texture, imitative writing, and repeated phrase structure. Each category of the study will include comparisons of Domenico Scarlatti’s keyboard sonatas with Creston’s sonata. Through an examination of the Piano Sonata and its Baroque elements, this study hopes to inspire renewed interest in the work among musicians and to help the performer give a more stylistically coherent, and accurate, performance.
Date: December 2011
Creator: Watanabe, Chie
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Beggars, Brides, and Bards: The Political Philosophy of Shakespeare’s The Taming of the Shrew (open access)

Beggars, Brides, and Bards: The Political Philosophy of Shakespeare’s The Taming of the Shrew

To do justice to Shakespeare’s comprehensive moral and political thought this paper seeks to discover what we can learn from the political philosophy of his largely neglected comedy, Taming of the Shrew. Not only does this endeavor provide a valuable forgotten link within the critical analyses of the theorists, but it also corrects the various misinterpretations of the play among contemporary critics. I argue that the play surveys various key themes that are rooted in classical political philosophy – such as education, the problems of anger, and the dynamic between nature and convention – and takes into consideration how they apply to modern man. Shakespeare borrows Plato’s idea that eroticism is central to education and explicitly references Ovid’s love books to reexamine our conceptions about one’s formation of character, the proper standards for judging the ideal mate, and the effects of these issues on the stability of the community. I also submit an innovative explanation of the relation between the induction and the main plot. Taken together they exhibit a critique of the role of the poet and his art in modern civil society.
Date: August 2011
Creator: Murphy, Stephanie Miranda
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Benthic Macroinvertebrates of Temperate, Sub-Antarctic Streams: The Effects of Altitudinal Zoning and Temperature on the Phenology of Aquatic Insects Associated to the Robalo River, Navarino Island (55°S), Chile (open access)

Benthic Macroinvertebrates of Temperate, Sub-Antarctic Streams: The Effects of Altitudinal Zoning and Temperature on the Phenology of Aquatic Insects Associated to the Robalo River, Navarino Island (55°S), Chile

The Cape Horn Biosphere Reserve, within the remote Sub-Antarctic ecoregion is a reservoir of expressions of biological and cultural diversity. Although it is considered one of 24 wilderness areas remaining in the world, it is not free from local and global threats, such as invasive species, and climate change. Field biologists and philosophers associated to the Sub-Antarctic Biocultural Conservation Program and the Omora Ethnobotanical Park, have worked to describe the region’s biocultural diversity, linking ecological and philosophical research into education, ecotourism, and conservation, through a methodology called field environmental philosophy (FEP), which integrates ecological sciences and environmental ethics through a 4-step cycle consisting of: 1) interdisciplinary research; 2) composition of metaphors; 3) design of field activities with an ecological and ethical orientation; and 4) implementation of in situ conservation areas. In this context, the purposes of this dissertation were to: 1) provide a comprehensive review of publications regarding the conservation status of aquatic and terrestrial insects at a global scale and with an emphasis in southern South America; 2) study the distribution of benthic macroinvertebrates through the sharp altitudinal gradient of the Róbalo River watershed; 3) describe the life histories of Gigantodax sp (Simuliidae: Diptera) and Meridialaris chiloeense (Leptophlebiidae: Ephemeroptera) …
Date: December 2011
Creator: Contador Mejías, Tamara Andrea
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Beyond Suzie Wong? An Analysis of Sandra Oh’s Portrayal in Grey’s Anatomy (open access)

Beyond Suzie Wong? An Analysis of Sandra Oh’s Portrayal in Grey’s Anatomy

In my study, I examine if and how Sandra Oh’s portrayal of Dr. Cristina Yang in Grey’s Anatomy, a primetime network drama, reifies or resists U.S. mediated stereotypes of Asian American females. I situate my intercultural study in an interpretive paradigm because I am want to explore how the evolving characteristics of existing the Asian American female mediated stereotype as they influence Asian American female identity. Additionally, I trace the historical development of Asian and Asian American stereotypes yellow peril to the model minority; and from Dragon Lady, Lotus Blossom, Geisha, and Suzie Wong. From my textual analysis, I suggest that when portrayals simultaneously reify and resist characteristics of existing Asian American stereotypes, they may help to breakdown perceived binaries of existing Asian and Asian American stereotypes.
Date: August 2011
Creator: Jones, Norma
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Beyond the Cabinet: Zbigniew Brzezinski’s Expansion of the National Security Adviser Position (open access)

Beyond the Cabinet: Zbigniew Brzezinski’s Expansion of the National Security Adviser Position

The argument illustrated in the thesis outlines Zbigniew Brzezinski’s ability to manipulate himself and his agenda to top priority as the national security advisor to President Carter. It further argues that Brzezinski deserves more blame for the failure of American foreign policy towards Iran; not President Carter. The sources include primary sources such as Zbigniew Brzezinski and President Jimmy Carter’s memoirs as well as information from President Carter’s library in Atlanta, Georgia. Secondary sources include historians who focus on both presidential policy and President Carter and his staff. The thesis is organized as follows: the introduction of Brzezinski, then the focus turns to his time in the White House, Iran, then what he is doing today.
Date: August 2011
Creator: McLean, Erika
Object Type: Thesis or Dissertation
System: The UNT Digital Library
A Bidirectional Two-Hop Relay Network Using GNU Radio and USRP (open access)

A Bidirectional Two-Hop Relay Network Using GNU Radio and USRP

A bidirectional two-hop relay network with decode-and-forward strategy is implemented using GNU Radio (software) and several USRPs (hardware) on Ubuntu (operating system). The relay communication system is comprised of three nodes; Base Station A, Base Station B, and Relay Station (the intermediate node). During the first time slot, Base Station A and Base Station B will each transmit data, e.g., a JPEG file, to Relay Station using DBPSK modulation and FDMA. For the final time slot, Relay Station will perform a bitwise XOR of the data, and transmit the XORed data to Base Station A and Base Station B, where the received data is decoded by performing another XOR operation with the original data.
Date: August 2011
Creator: Le, Johnny
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Biocompatible Hybrid Nanomaterials Involving Polymers and Hydrogels Interfaced with Phosphorescent Complexes and Toxin-Free Metallic Nanoparticles for Biomedical Applications (open access)

Biocompatible Hybrid Nanomaterials Involving Polymers and Hydrogels Interfaced with Phosphorescent Complexes and Toxin-Free Metallic Nanoparticles for Biomedical Applications

The major topics discussed are all relevant to interfacing brightly phosphorescent and non-luminescent coinage metal complexes of [Ag(I) and Au(I)] with biopolymers and thermoresponsive gels for making hybrid nanomaterials with an explanation on syntheses, characterization and their significance in biomedical fields. Experimental results and ongoing work on determining outreaching consequences of these hybrid nanomaterials for various biomedical applications like cancer therapy, bio-imaging and antibacterial abilities are described. In vitro and in vivo studies have been performed on majority of the discussed hybrid nanomaterials and determined that the cytotoxicity or antibacterial activity are comparatively superior when compared to analogues in literature. Consequential differences are noticed in photoluminescence enhancement from hybrid phosphorescent hydrogels, phosphorescent complex ability to physically crosslink, Au(I) sulfides tendency to form NIR (near-infrared) absorbing AuNPs compared to any similar work in literature. Syntheses of these hybrid nanomaterials has been thoroughly investigated and it is determined that either metallic nanoparticles syntheses or syntheses of phosphorescent hydrogels can be carried in single step without involving any hazardous reducing agents or crosslinkers or stabilizers that are commonly employed during multiple step syntheses protocols for syntheses of similar materials in literature. These astounding results that have been discovered within studies of hybrid nanomaterials …
Date: August 2011
Creator: Marpu, Sreekar B.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Bioconcentration of Triclosan, Methyl-Triclosan, and Triclocarban in the Plants and Sediments of a Constructed Wetland (open access)

Bioconcentration of Triclosan, Methyl-Triclosan, and Triclocarban in the Plants and Sediments of a Constructed Wetland

Triclosan and triclocarban are antimicrobial compounds added to a variety of consumer products that are commonly detected in waste water effluent. The focus of this study was to determine whether the bioconcentration of these compounds in wetland plants and sediments exhibited species specific and site specific differences by collecting field samples from a constructed wetland in Denton, Texas. The study showed that species-specific differences in bioconcentration exist for triclosan and triclocarban. Site-specific differences in bioconcentration were observed for triclosan and triclocarban in roots tissues and sediments. These results suggest that species selection is important for optimizing the removal of triclosan and triclocarban in constructed wetlands and raises concerns about the long term exposure of wetland ecosystems to these compounds.
Date: August 2011
Creator: Zarate, Frederick M., Jr.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Biodegradable Poly(hydroxy Butyrate-co-valerate) Nanocomposites And Blends With Poly(butylene Adipate-co-terephthalate) For Sensor Applications (open access)

Biodegradable Poly(hydroxy Butyrate-co-valerate) Nanocomposites And Blends With Poly(butylene Adipate-co-terephthalate) For Sensor Applications

The utilization of biodegradable polymers is critical for developing “cradle to cradle” mindset with ecological, social and economic consequences. Poly(hydroxy butyrate-co-valerate) (PHBV) shows significant potential for many applications with a polypropylene equivalent mechanical performance. However, it has limitations including high crystallinity, brittleness, small processing window, etc. which need to be overcome before converting them into useful products. Further the development of biodegradable strain sensing polymer sensors for structural health monitoring has been a growing need. In this dissertation I utilize carbon nanotubes as a self sensing dispersed nanofiller. The impact of its addition on PHBV and a blend of PHBV with poly(butylene adipate-co-terephthalate) (PBAT) polymer was examined. Nanocomposites and blends of PHBV, PBAT, and MWCNTs were prepared by melt-blending. The effect of MWCNTs on PHBV crystallinity, crystalline phase, quasi-static and dynamic mechanical property was studied concurrently with piezoresistive response. In PHBV/PBAT blends a rare phenomenon of melting point elevation by the addition of low melting point PBAT was observed. The blends of these two semicrystalline aliphatic and aromatic polyesters were investigated by using differential scanning calorimetry, small angle X-ray scattering, dynamic mechanical analysis, surface energy measurement by contact angle method, polarized optical and scanning electron microscopy, and rheology. The study …
Date: December 2011
Creator: Vidhate, Shailesh
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Biodiversity Loss, the Motivation Problem, and the Future of Conservation Education in the United States (open access)

Biodiversity Loss, the Motivation Problem, and the Future of Conservation Education in the United States

The purpose of this dissertation is to make sense of two sets of reactions. On the one hand, Americans can barely lift a finger to help threatened and endangered species while on the other, they routinely come to the aid of human victims of disaster. I argue that in contrast to cases of human tragedy, for the biodiversity crisis conservationists are faced not only with the familiar yet arduous task of motivating the American public to care for living other-than-humans, but they are also saddled with having to overcome the motivation problem of future ethics. The motivation problem consists in eliminating or bridging a motivational gap that lies between knowledge of the effects of our actions on future generations and action taken based upon such knowledge. The gap exists because motives that typically move people to action are either ineffective or unavailable. What is more, the gap influences not only our ability to care for future humans, but it affects our ability to care for future other-than-humans as well. Biodiversity loss is in fact a subset of the problem of future generations, an identification hitherto little appreciated. I argue that conservationists can overcome the motivational gap not by appealing directly …
Date: December 2011
Creator: Grove-Fanning, William
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Biopsychosocial Approach to Understanding, Subtyping, and Treating Depression: Results from the National Comorbidity Survey - Replication. (open access)

The Biopsychosocial Approach to Understanding, Subtyping, and Treating Depression: Results from the National Comorbidity Survey - Replication.

The most effective and useful way to diagnose and subtype depression has been a long debated topic which even now does not have a definite answer. The biopsychosocial approach to diagnosis may be a solution to this problem by linking various etiologies to symptom presentation. The biopsychosocial model, in regard to depression, takes into account biological risk factors/contributors, psychological or cognitive risk factors/contributors, and social risk factors/contributors to depression when making diagnosis and subtyping determinations. However, the most effective way to use this model in the assessment, diagnosis, and treatment of depression is not yet clear. In this study, the utility of the biopsychosocial model as an effective approach to conceptualizing and treating depression was assessed by testing hypotheses that showed that etiological contributors are related to the presence and differential presentation of depression, and that these etiologically-based subtypes of depression respond differently to different forms of treatment. These hypotheses were tested using data from the National Comorbidity Survey - Replication (NCS-R). Results showed that the biopsychosocial model can effectively predict the presence, severity and chronicity of depression, and may inform specific biopsychosocially-based subtypes. No conclusions could be drawn regarding success in treatment based on the biopsychosocial model. Future directions …
Date: May 2011
Creator: McGill, Brittney C.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Bioresorbable Polymer Blend Scaffold for Tissue Engineering (open access)

Bioresorbable Polymer Blend Scaffold for Tissue Engineering

Tissue engineering merges the disciplines of study like cell biology, materials science, engineering and surgery to enable growth of new living tissues on scaffolding constructed from implanted polymeric materials. One of the most important aspects of tissue engineering related to material science is design of the polymer scaffolds. The polymer scaffolds needs to have some specific mechanical strength over certain period of time. In this work bioresorbable aliphatic polymers (PCL and PLLA) were blended using extrusion and solution methods. These blends were then extruded and electrospun into fibers. The fibers were then subjected to FDA standard in vitro immersion degradation tests where its mechanical strength, water absorption, weight loss were observed during the eight weeks. The results indicate that the mechanical strength and rate of degradation can be tailored by changing the ratio of PCL and PLLA in the blend. Processing influences these parameters, with the loss of mechanical strength and rate of degradation being higher in electrospun fibers compared to those extruded. A second effort in this thesis addressed the potential separation of the scaffold from the tissue (loss of apposition) due to the differences in their low strain responses. This hypothesis that using knit with low tension will …
Date: May 2011
Creator: Manandhar, Sandeep
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Bipolar Disorder in the Family: Impact on Functioning and Adjustment to College (open access)

Bipolar Disorder in the Family: Impact on Functioning and Adjustment to College

Bipolar disorder is a serious mental disorder, affecting anywhere from 2 to 4 percent of Americans. Though research has indicated that this disorder can be devastating for patients, less is known about how the disorder impacts family members. There is no research that has considered impacts on family members adjusting to college. The purpose of the current study was to determine the extent to which having a family member with bipolar disorder impacts adjustment to college, as well as factors that might account for worse functioning. Two groups were recruited: students with a bipolar family member (n = 25) and students with no family history of the disorder (n = 50). Participants were interviewed regarding their own histories of a mood disorder, as well as mood disorder histories in their immediate families. They then completed surveys assessing adjustment to college, functioning, caregiving burden, parental relationship, and attachment style. Students with a family history of bipolar disorder had significantly lower social adjustment scores, lower personal-emotional adjustment scores, and lower financial functioning scores than students without this history. Lower scores were found even after controlling for psychopathology. Avoidant attachment behaviors, anxious attachment behaviors, and aspects of the paternal relationship were identified as …
Date: August 2011
Creator: Crandall, Erin
Object Type: Thesis or Dissertation
System: The UNT Digital Library