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Qos Aware Service Oriented Architecture
Service-oriented architecture enables web services to operate in a loosely-coupled setting and provides an environment for dynamic discovery and use of services over a network using standards such as WSDL, SOAP, and UDDI. Web service has both functional and non-functional characteristics. This thesis work proposes to add QoS descriptions (non-functional properties) to WSDL and compose various services to form a business process. This composition of web services also considers QoS properties along with functional properties and the composed services can again be published as a new Web Service and can be part of any other composition using Composed WSDL.
Date:
August 2013
Creator:
Adepu, Sagarika
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Spatial Mismatch Between Hiv Infection and Access to Hiv Service Facilities in Texas
Since 2004, the number of people living with HIV (PLWH) has steadily increased by about 5% and currently, the number in Texas is about 86,000. Though the National HIV/AIDS Strategic Plan seeks to ensure “unfettered access to quality healthcare”, barriers to access still exist especially among minority populations. This study examines the relationship between HIV infection rates and the geographic location of HIV service centers with a focus on 4 counties: namely, Dallas, Denton, Harris and Tarrant. The goal is to show whether there is a spatial mismatch between HIV rates and service providers. Are service facilities located in zip codes where they are most needed? Using the vulnerability framework and the Inverse Care Law (ICL), we address the research question using demographic variables (race/ethnicity, sex, poverty, education attainment) and HIV data. Our results show that extreme vulnerable zip codes have high HIV rates and closest proximity to HIV service providers.
Date:
August 2013
Creator:
Aggrey Korsah, Emmanuel
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Energy Harvesting Wireless Piezoelectric Resonant Force Sensor
The piezoelectric energy harvester has become a new powering option for some low-power electronic devices such as MEMS (Micro Electrical Mechanical System) sensors. Piezoelectric materials can collect the ambient vibrations energy and convert it to electrical energy. This thesis is intended to demonstrate the behavior of a piezoelectric energy harvester system at elevated temperature from room temperature up to 82°C, and compares the system’s performance using different piezoelectric materials. The systems are structured with a Lead Magnesium Niobate-Lead Titanate (PMN-PT) single crystal patch bonded to an aluminum cantilever beam, Lead Indium Niobate-Lead Magnesium Niobate-Lead Titanate (PIN-PMN-PT) single crystal patch bonded to an aluminum cantilever beam and a bimorph cantilever beam which is made of Lead Zirconate Titanate (PZT). The results of this experimental study show the effects of the temperature on the operation frequency and output power of the piezoelectric energy harvesting system. The harvested electrical energy has been stored in storage circuits including a battery. Then, the stored energy has been used to power up the other part of the system, a wireless resonator force sensor, which uses frequency conversion techniques to convert the sensor’s ultrasonic signal to a microwave signal in order to transmit the signal wirelessly.
Date:
December 2013
Creator:
Ahmadi, Mehdi
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Determination of Molecular Descriptors for Illegal Drugs by Gc-fid Using Abraham Solvation Model
The Abraham solvation parameter model is a good approach for analyzing and predicting biological activities and partitioning coefficients. The general solvation equation has been used to predict the solute property (SP) behavior of drug compounds between biological barriers. Gas chromatography (GC) retention time can be used to predict molecular descriptors, such as E, S, A, B & L for existing and newly developed drug compounds. In this research, six columns of different stationary phases were used to predict the Abraham molecular descriptors more accurately. The six stationary phases used were 5% phenylmethyl polysiloxane, 6% cyanopropylphenyl 94% dimethylpolysiloxane, 5% diphenyl 95% dimethylpolysiloxane, 100% dimethylpolysiloxane, polyethylene glycol and 35% diphenyl 65% dimethylpolysiloxane. Retention times (RT) of 75 compounds have been measured and logarithm of experimental average retention time Ln(RTexp) are calculated. The Abraham solvation model is then applied to predict the process coefficients of these compounds using the literature values of the molecular descriptors (Acree Compilation descriptors). Six correlation equations are built up as a training set for each of the six columns. The six equations are then used to predict the molecular descriptors of the illegal drugs as a test set. This work shows the ability to extract molecular information from …
Date:
December 2013
Creator:
Akhter, Syeda Sabrina
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Evaluating Appropriateness of Emg and Flex Sensors for Classifying Hand Gestures
Hand and arm gestures are a great way of communication when you don't want to be heard, quieter and often more reliable than whispering into a radio mike. In recent years hand gesture identification became a major active area of research due its use in various applications. The objective of my work is to develop an integrated sensor system, which will enable tactical squads and SWAT teams to communicate when there is absence of a Line of Sight or in the presence of any obstacles. The gesture set involved in this work is the standardized hand signals for close range engagement operations used by military and SWAT teams. The gesture sets involved in this work are broadly divided into finger movements and arm movements. The core components of the integrated sensor system are: Surface EMG sensors, Flex sensors and accelerometers. Surface EMG is the electrical activity produced by muscle contractions and measured by sensors directly attached to the skin. Bend Sensors use a piezo resistive material to detect the bend. The sensor output is determined by both the angle between the ends of the sensor as well as the flex radius. Accelerometers sense the dynamic acceleration and inclination in 3 …
Date:
May 2013
Creator:
Akumalla, Sarath Chandra
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
3GPP Long Term Evolution LTE Scheduling
Future generation cellular networks are expected to deliver an omnipresent broadband access network for an endlessly increasing number of subscribers. Long term Evolution (LTE) represents a significant milestone towards wireless networks known as 4G cellular networks. A key feature of LTE is the implementation of enhanced Radio Resource Management (RRM) mechanism to improve the system performance. The structure of LTE networks was simplified by diminishing the number of the nodes of the core network. Also, the design of the radio protocol architecture is quite unique. In order to achieve high data rate in LTE, 3rd Generation Partnership Project (3GPP) has selected Orthogonal Frequency Division Multiplexing (OFDM) as an appropriate scheme in terms of downlinks. However, the proper scheme for an uplink is the Single-Carrier Frequency Domain Multiple Access due to the peak-to-average-power-ratio (PAPR) constraint. LTE packet scheduling plays a primary role as part of RRM to improve the system’s data rate as well as supporting various QoS requirements of mobile services. The major function of the LTE packet scheduler is to assign Physical Resource Blocks (PRBs) to mobile User Equipment (UE). In our work, we formed a proposed packet scheduler algorithm. The proposed scheduler algorithm acts based on the number …
Date:
December 2013
Creator:
Alotaibi, Sultan
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Novel Role of Trypsin in Zebrafish
It has been shown previously in our laboratory that zebrafish produce trypsin from their gills when they are under stress, and this trypsin is involved in thrombocyte activation via PAR2 during gill bleeding. In this study, I investigated another role of the trypsin that is secreted from zebrafish. This investigation has demonstrated a novel role of trypsin in zebrafish. Not only did this investigation demonstrate the role of trypsin in zebrafish behavior, but also it showed that PAR2 might be the receptor that is involved in trypsin-mediated behavioral response. In addition, we have shown that Gq and ERK inhibitors are able to block the trypsin pathway and prevent the escaping behavior. Finally, the results of this investigation suggest that the cells that respond to trypsin are surface cells, which have an appearance similar to that of neuromast cells.
Date:
May 2013
Creator:
Alsrhani, Abdullah Falleh
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Optical Transparent Pmma Composite Reinforced By Coaxial Electrospun Pan Hollow Nanofibers
Electrospinning has been recognized as an efficient technique for the fabrication of polymer fibers. These electrospun fibers have many applications across a broad range of industries. In this research, optical transparent composites were successfully fabricated by embedding polyacrylonitrile (PAN) hollow nanofibers into poly (methyl methacrylate) (PMMA) matrix. The hollow PAN nanofibers were prepared by coaxial electrospinning. The PAN was used as the shell solution, and the mineral oil was used as the core solution. The resulting fibers were then etched with octane to remove the mineral oil from the core. The hollow PAN fibers were then homogeneously distributed in PMMA resins to fabricate the composite. The morphology, transmittance and mechanical properties of the PAN/PMMA composite were then characterized with an ESEM, TEM, tensile testing machine, UV-vis spectrometer and KD2 Pro Decagon device. The results indicated that the hollow nanofibers have relatively uniform size with one-dimensional texture at the walls. The embedded PAN hollow nanofibers significantly enhanced the tensile stress and the Young's modulus of the composite (increased by 58.3% and 50.4%, respectively), while having little influence on the light transmittance of the composite. The KD2 Pro device indicated that the thermal conductivity of the PMMA was marginally greater than the …
Date:
May 2013
Creator:
Antoine, Donley
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Master's Recital: 2013-10-26 - Tyler Austin, bassoon
Access:
Use of this item is restricted to the UNT Community
Recital presented at the UNT College of Music Voertman Hall in partial fulfillment of the Master of Music degree.
Date:
October 26, 2013
Creator:
Austin, Tyler
Object Type:
Sound
System:
The UNT Digital Library
Master’s Recital: 2013-10-26 - Tyler Austin, bassoon
Recital presented at the UNT College of Music Voertman Hall in partial fulfillment of the Master’s of Music degree.
Date:
October 26, 2013
Creator:
Austin, Tyler
Object Type:
Video
System:
The UNT Digital Library
Laser Deposition, Heat-treatment, and Characterization of the Binary Ti-xmn System
The present research seeks to characterization of an additively manufactured and heat-treated Ti-xMn gradient alloy, a binary system that has largely been unexplored. In order to rapidly assess this binary system, compositionally graded Ti-xMn (0<x<15 wt%) specimens were fabricated using the LENS (Laser Engineered Net Shaping) and were subsequently heat-treated and characterized using a wide range of techniques. Microstructural changes with respect to the change in thermal treatments, hardness and chemical composition were observed and will be presented. These include assessments of both continuous cooling, leading to observations of both equilibrium and metastable phases, including the titanium martensites, and to direct aging studies looking for composition regimes that produce highly refined alpha precipitates – a subject of great interest given recent understandings of non-classical nucleation and growth mechanisms. The samples were characterized using SEM, EDS, TEM, and XRD and the properties probed using a Vickers Microhardness tester.
Date:
August 2013
Creator:
Avasarala, Chandana
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Kinetics of Sulfur: Experimental Study of the Reaction of Atomic Sulfur with Acetylene and Theoretical Study of the Cn + So Potential Energy Surface
The kinetics of the reaction of atomic sulfur with acetylene (S (3P) + C2H2) were investigated experimentally via the flash photolysis resonance fluorescence method, and the theoretical potential energy surface for the reaction CN + SO was modeled via the density functional and configuration interaction computational methods. Sulfur is of interest in modern chemistry due to its relevance in combustion and atmospheric chemistry, in the Claus process, in soot and diamond-film formation and in astrochemistry. Experimental conditions ranged from 295 – 1015 K and 10 – 400 Torr of argon. Pressure-dependence was shown at all experimental temperatures. The room temperature high-pressure limit second order rate constant was (2.10 ± 0.08) × 10-13 cm3 molecule-1 s-1. The Arrhenius plot of the high-pressure limit rate constants gave an Ea of (11.34 ± 0.03) kJ mol-1 and a pre-exponential factor of (2.14 ± 0.19) × 10-11 cm3 molecule-1 s-1. S (3P) + C2H2 is likely an adduct forming reaction due to pressure-dependence (also supported by a statistical mechanics analysis) which involves intersystem crossing. The potential energy surface for CN + SO was calculated at the B3LYP/6-311G(d) level and refined at the QCISD/6-311G(d) level. The PES was compared to that of the analogous reaction …
Date:
May 2013
Creator:
Ayling, Sean A.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Corrosion Protection of Aerospace Grade Magnesium Alloy Elektron 43™ for Use in Aircraft Cabin Interiors
Magnesium alloys exhibit desirable properties for use in transportation technology. In particular, the low density and high specific strength of these alloys is of interest to the aerospace community. However, the concerns of flammability and susceptibility to corrosion have limited the use of magnesium alloys within the aircraft cabin. This work studies a magnesium alloy containing rare earth elements designed to increase resistance to ignition while lowering rate of corrosion. The microstructure of the alloy was documented using scanning electron microscopy. Specimens underwent salt spray testing and the corrosion products were examined using energy dispersive spectroscopy.
Date:
August 2013
Creator:
Baillio, Sarah S.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Attention Biases Associated with Vulnerability to Bipolar Disorder
Bipolar disorder is associated with significant social and occupational impairments, as well as increased risk for substance abuse and suicide. More research is needed to identify potential mechanisms associated with vulnerability to the disorder. Previous research has identified altered processing of emotional information in bipolar and bipolar-prone individuals, including attentional biases which appear to differ based on the current affective state of the individual. The current study applied a sensitive measure of attention (i.e., eye-tracking) to assess whether vulnerability to bipolar disorder, as indexed by hypomanic personality traits, would be correlated with biases in attention to emotional facial stimuli, independent of mood state. Hypomanic personality traits were hypothesized to be associated with greater attention to happy and angry faces, as indexed by faster initial orientation, more frequent gazes, and longer gaze duration for these stimuli. Participants completed self-report measures assessing current mood symptoms, positive and negative affect, and hypomanic personality traits. They then completed two tasks assessing attention for emotional faces. The first was an eye-tracking task, which measured latency to first fixation, total gaze duration and total number of gazes for each emotional face category. The second was a spatial cueing task which assessed both attentional engagement with emotional …
Date:
May 2013
Creator:
Bain, Kathleen Marie
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Paul and Slavery: a Conflict of Metaphor and Reality
The debate on Paul’s views on slavery has ranged from calling him criminal in his enforcement of the status quo to rallying behind his idea of equal Christians in a community. In this thesis I blend these two major views into the idea that Paul supported both the institution of slavery and the slave by legitimizing the role of the slave in Christian theology. This is done by reviewing the mainstream views of slavery, comparing them to Paul’s writing, both the non-disputed and disputed, and detailing how Paul’s presentation of slavery differed from mainstream views. It is this difference which protects the slave from their master and brings attention to the slave’s actions and devotion. To Paul, slavery was a natural institution which should be emulated Christian devotion. He did not challenge the Romans but called for Christians to challenge the mainstream views of the roles of slavery in the social hierarchy of their communities.
Date:
December 2013
Creator:
Baker, James C.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Influence of Perceived Support From Parental and Peer Relationships on Students' Health-related Beliefs and Behaviors
College is an important time for young adults, but most college students fail to meet the daily recommendations for physical activity. Social support is associated with positive health practices, but limited research is available on the role of perceived support from specific relationships, (e.g., peers and parents). The purpose of this study was to evaluate the effect of perceived support from parental and peer relationships on health-related beliefs and behaviors. Participants (N = 333) completed the Quality of Relationships Inventory, Multidimensional Scale of Perceived Social Support, Satisfaction With Life scale, and a short version of the Physical Self-Description Questionnaire. While highly active students did not necessarily have more socially support relationships, females self-reported more conflict with both parents and more depth and support with a special person in their life than males, and parental and peer relationships appeared to be a greater influence on females' perceptions of satisfaction and self-worth.
Date:
May 2013
Creator:
Barton, Mitch
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A Study of Mechanisms to Engineer Fine Scale Alpha Phase Precipitation in Beta Titanium Alloy, Beta 21S
Metastable b-Ti alloys are titanium alloys with sufficient b stabilizer alloying additions such that it's possible to retain single b phase at room temperature. These alloys are of great advantage compared to a/b alloys since they are easily cold rolled, strip produced and can attain excellent mechanical properties upon age hardening. Beta 21S, a relatively new b titanium alloy in addition to these general advantages is known to possess excellent oxidation and corrosion resistance at elevated temperatures. A homogeneous distribution of fine sized a precipitates in the parent b matrix is known to provide good combination of strength, ductility and fracture toughness. The current work focuses on a study of different mechanisms to engineer homogeneously distributed fine sized a precipitates in the b matrix. The precipitation of metastable phases upon low temperature aging and their influence on a precipitation is studied in detail. The precipitation sequence on direct aging above the w solvus temperature is also assessed. The structural and compositional evolution of precipitate phase is determined using multiple characterization tools. The possibility of occurrence of other non-classical precipitation mechanisms that do not require heterogeneous nucleation sites are also analyzed. Lastly, the influence of interstitial element, oxygen on a precipitation …
Date:
August 2013
Creator:
Behera, Amit Kishan
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
How Drawing Becomes Writing: Proto-orthography in the Codex Borbonicus
The scholarship on the extent of the Nahuatl writing system makes something of a sense-reference error. There are a number of occurrences in which the symbols encode a verb, three in the present tense and one in the past tense. The context of the use of calendar systems and written language in the Aztec empire is roughly described. I suggest that a new typology for is needed in order to fully account for Mesoamerican writing systems and to put to rest the idea that alphabetic orthographies are superior to other full systems. I cite neurolinguistic articles in support of this argument and suggest an evolutionary typology based on Gould's theory of Exaptation paired with the typology outlined by Justeson in his "Origins of Mesoamerican Writing" article.
Date:
May 2013
Creator:
Bolinger, Taylor
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
La Evolución Del Subalterno En Tres Novelas Mexicanas: La Negra Angustias, Balún Canán, Y Neonao
The subaltern is a recurrent literary figure in Mexican narrative. The objective of this thesis is to investigate three ethnic groups – indeed, subalterns – in Mexico which include: Afro-Mexicans, indigenous groups, and Filipino colonial subjects from the perspectives of the Mexican Revolution, post-revolutionary Mexico, and the conquest of the Philippines in the sixteenth century. The principal characters play crucial roles in events shaping the history and culture of Mexico and thus demonstrate their importance to the country's development while also revealing the reality of subalterns. The literary research shows that trying circumstances or a lack of self-identity were the main causes for a character to be or become a subaltern in addition to their inherent ethnic disadvantages. However, the characters who overcame their subaltern state often changed personality traits or adapted to their surroundings in order to be assimilated into the majority culture.
Date:
May 2013
Creator:
Bowen, LaVerne Alexandra
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Effect of Season Performance on Male and Female Track and Field Athletes’ Self-identity
Although the “self” has generally been conceptualized as relatively stable in sport-specific research, events such as deselection, injury, and career termination have been found to negatively affect athletes’ levels of identification with the athlete role. Additionally, there has been limited research regarding competitive failure and its ability to negatively affect athletes’ levels of identification with the athlete role. The purpose of the present investigation was to provide additional evidence regarding the influence poor competitive seasons have on the malleability of athletes’ self-identity. Athletes were followed throughout the course of their season to determine whether athletes who encountered a poor competitive season reported lowered levels of athletic identity. Specifically, male and female NCAA Division I track and field athletes completed pre-indoor, post-indoor, and post-outdoor assessments of athletic identity. Contrary to previous research, the current study’s results indicated no identifiable relationship between male and female athletes’ season performance satisfaction and their level of post-indoor and post-outdoor athletic identity. Thus, the greatest predictor of athletes’ post-season level of athletic identity was their pre-season level of athletic identity, regardless of season performance. Given these results, future research should assess self-esteem as well as other potential coping strategies athletes might use in order to gain …
Date:
August 2013
Creator:
Bradstreet, Tyler C.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
This Isn't About Me: Communication Privacy Management Theory and Public Confession
Individuals at the DFW Church publicly confess intensely personal information, such as drug and alcohol addiction, spousal and child abuse, stripping, and sexual abuse. Using communication privacy management theory (CPM), I examined the way individuals at the DFW Church manage their private information, how they make disclosure decisions, and how they manage boundaries around their private information. I interviewed 13 individuals who participated in public confession, and coded their responses to identify the common themes and tactics for making disclosure decisions. Through this process, I pioneer the application of CPM to examine public disclosure events, rather than dyadic or small group disclosures. I also expand our current understanding of motivations for disclosure; rather than focusing on selfish or therapeutic motivations, participants want to encourage others through their disclosure. In terms of boundary management, individuals at the DFW Church believe that God owns part, or all, of their information; thus, disclosing their pasts is "not about them." Participants construct a new identity through their testimony narrative, effectively putting the old person in the past and presenting a new, Christian identity to the church body for group approval. In this context, confessing a negative behavior becomes a way to build a positive …
Date:
May 2013
Creator:
Brittain, Kära Ann Caskey
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Ultimate Ethos: Challenges, Cooptation and Survival During Ultimate’s Adolescence
Ultimate is the fastest growing field sport in America. Created in 1968, forty-five years later the sport was still on the periphery of the mainstream but reached new heights in 2013 – two professional leagues, over 800 college teams and a broadcasting deal with ESPN – and the discussions throughout the sports’ history have never been as relevant. Self-officiation and the Spirit of the Game are the main tenets that make up the ethos of the sport and its community. These unique aspects differentiate Ultimate’s predominate culture from that of mainstream sports culture. This study shows the countercultural ties and survival of the ethos during the adolescent period of Ultimate’s evolution (1987-2010). It examines the progression of the community’s established grassroots culture and the governing body of the sport alongside the influx of young players with mainstream sports attitudes who bolstered certain organizers’ attempts to alter Ultimate in the hopes of gaining “legitimacy” through adding third-party officials, commercialization and corporate sponsorship.
Date:
August 2013
Creator:
Brooks, David
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Classless: on Being Middle Class in America
Classless: On Being Middle Class in America is a documentary film that explores what it means to be middle class in America. The film combines personal narrative, folksy reporting, and comedy as the film's director— Joe Brown, tries to reconcile his own status anxiety with everyday understandings of social class. Classless takes the form of a journey; the film travels through the American South, Northeast, and the Mountain West while trying to get at the heart of our middle class American Dream. Classless forwards three main arguments: (1) the American middle class is not as all-encompassing as seems; (2) Americans are more concerned about inequality than both politicians and the media suggest; and (3) many Americans are not actually middle class, economically speaking.
Date:
May 2013
Creator:
Brown, Joseph V.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Adapting on the Plains: the United States Army's Evolution of Mobile Warfare in Texas, 1848-1859
The Army, despite having been vexed for a century on how to effectively fight the Plains Indians, ultimately defeated them only a decade after the Civil War. This thesis will bring to the forefront those individuals who adapted fighting techniques and ultimately achieved victories on the Texas frontier before the Civil War. The majority of these victories came as a result of mounted warfare under the direction of lower ranking officers in control of smaller forces. The tactic of fighting Indians from horseback was shown to be effective by the Rangers and later emulated by the Army.
Date:
May 2013
Creator:
Buchy, Mark B.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library