This thesis is an experimental study of the fluidization of binary mixture in particulate flows. A fluidized bed with two distributors was built with water being used as carrying fluid. Three types of solid particles of nylon, glass and aluminum of the same size and different densities are used in the experiments. The wall effect on a single particle fluidization, the fluidization of binary mixture of large density difference (nylon and aluminum of density ratio of 0.42), and the fluidization of binary mixture of close density (glass and aluminum with density ratio of 0.91) were investigated. Also, the effect of distributors on mono-disperse and bi-disperse particle fluidization was investigated. Results show that the presence of narrow walls reduces the minimum fluidization velocity for a single particle by as much as nearly 40%. Also, in the case of binary mixture of close density particles, uniform mixing was easily achieved and no segregation was observed, but in the case of large density difference particles, there exists significant segregation and separation. At high velocity, the uniform distributor behaves like a transport bed. To achieve a full bed in the single jet, it requires 1.5 times velocity of the uniform distributor. This behavior determines …

Interest in a multiracial society has increased in recent years and including on racism and prejudice and in the propensity to stereotype out-groups. Theories on racism help explain the dominant group's prejudice toward subordinate groups. Yet they only explain why dominant group members stereotype subordinates or if the dominant group's propensity to stereotype is different from that of subordinate groups. Recent assimilation theories suggest that some minorities are assimilating with Whites but Blacks are not undergoing assimilation. Classic assimilation theory suggests that when a subordinate group assimilates with the dominant group then they will also take on the dominant group's values and beliefs, including their prejudices and propensities to stereotype. The use of racial stereotypes in support of the assimilation of a minority group has not been tested. Results from the LSAF national survey provide support for Asians to be assimilating with Whites. However, Hispanics do not appear to be taking on Whites' propensity to stereotype, contradicting the prediction that Hispanics are assimilating with Whites.

Rete Mirabile is my new installation piece combining scientific principles with live computer generated music. The title is a Latin term meaning "Wonderful Net," which I use to refer to the highly convoluted network of biological data that drives my installation. The sonification of data, computer modeling of biological processes, kinetic sculptures, and user interactivity are central parts of the installation. The paper is organized as follows: First, brief history of the forerunners that inspired my work is given. This includes a short discussion on how John Cage and David Tudor influenced current artists works, and how those works have influenced my own work. Then I review current installation works that share similarities with my own. Finally, a detailed discussion and analysis of the construction and function concludes the paper.

This study is a cultural and political analysis of the emergence and deterioration of the relationship between George Washington and Thomas Paine. It is informed by modern studies in Atlantic history and culture. It presents the falling out of the two Founding Fathers as a reflection of two competing political cultures, as well as a function of the class aspirations of Washington and Paine. It chronologically examines the two men's interaction with one another from the early days of the American Revolution to the Reign of Terror of the French Revolution. Along the way this study highlights the dynamics that characterized the Washington-Paine relationship and shows how the two men worked together to further their own agendas. This study also points to Thomas Paine's involvement with a web of Democratic Societies in America and to Washington's increasing wariness and suspicion of these Societies as agents of insurrection.

The occurrence of custodial grandparents is increasing greatly. These grandparents face added stress and many adversities that arise from caregiving. Findings of current research tends to be mixed on the effects of grandparents raising grandchildren experience. Much research concludes that grandparent caregivers experience negative declines in overall health and well-being, while other research points out that the caregiving role may actually be a positive experience for the grandparent. The current study hypothesizes that mixed research may be a result of varying levels of resilience in the custodial grandparent population. The model proposed in this study looks at resilience as a mediator between several variables that effect custodial grandparenting. The current sample consisted of 239 custodial grandparents. A regression/correlation analysis was conducted on the data, and it was found that resilience levels were significant in mediating the effects of grandparent caregiving.

Barnes's Vagaries Malicieux, and Nin's Delta of Venus, are examples the developing vision of female sex, and both authors use their literary techniques to accomplish their aesthetic vision of amorality. Nin's visions are based on her and her friends' extreme experiences. Her primary concern was expressing her erotic and amorally aesthetic gaze, and the results of her efforts are found in her aesthetic vision of Paris and the amoral lifestyle. Barnes uses metaphor and linguistics to fashion her aesthetic vision. Her technique in "Run, Girls, Run!" both subverts any sense of morality, and offers an interesting and challenging read for its audience. In "Vagaries Malicieux" Barnes's Paris is dark while bright, and creates a sense of nothingness, indicated only by Barnes's aesthetic appreciation.

This study proposes and tests a comprehensive theory detailing the motivations behind political apologies. A brief survey of the literature shows a field rich in case studies but lacking in rigorous scientific analysis. The theory presented proposes a three-level examination of political apology at the state, dyadic, and system levels and incorporates the effects of culture, conflict, and the nature of the international system into analysis. This study makes use of a new dataset recording the occurrence of political apologies for interstate conflict atrocities from 1900 to 2006. The results suggest that the existing literature, while rich, does not account for all the motivating factors behind apology. The results also confirm that political apology is a creation of the modern era and a result of the liberalization of the international system. In conclusion, paths for future research are suggested and the advent of a global "age of apology" is confirmed.

Previous research indicates that survivors of sexual assault often blame themselves for the assault. Research has also shown that people blame the perpetrator in some situations and the survivor in other situations involving sexual assault. The purpose of this study was to discover if survivors of sexual assault who blame themselves tend to blame other survivors (survivor blame) in situations different from their own. Another purpose was to assess whether or not sexual assault survivors who do not blame themselves for their attack tend to blame other survivors. The participants' attributional style was also assessed in order to understand the relations between self-blame and survivor blame in situations involving sexual assault. Findings indicated that certain types of attributional style are related to self-blame in sexual assault survivors and blame toward sexual assault survivors depicted in vignettes. This indicates that attributional style may have important implications in the clinical setting to aid sexual assault survivors who experience self-blame, as well in educating society about sexual assault and the ultimate responsibility of perpetrators.

This film is an autobiographical documentary which tells the story of the process of documenting the filmmaker's trip to his land of heritage. As his plans for his journey and film begin to go awry, he begins to question the entire process of trying to connect with nation and place.

Research on the origins of the violoncello reveals considerable dispute concerning the existence and identity of its ancestor, the bass violin. This study focuses on the classification of the sixteenth- and early seventeenth-century bass violin by means of the following criteria: construction, early history and development, role due the social status of builders and players, use within the violin band, performing positions, and defining terminology. Accounts of inventories, organological treatises, music theoretical writings, lists of households and royal courts, descriptions of feasts, reports of choreographies and iconographical examples confirm the bass violin's presence in the late sixteenth century and beyond. Three of the earliest unchanged extant organological examples embody, complement and corroborate the bass violin's identification, and conclude the essay.

Racial slavery was a critical element in the cultural development of the Choctaws and was a derivative of the peculiar institution in southern states. The idea of genial and hospitable slave owners can no more be conclusively demonstrated for the Choctaws than for the antebellum South. The participation of Choctaws in the Civil War and formal alliance with the Confederacy was dominantly influenced by the slaveholding and a connection with southern identity, but was also influenced by financial concerns and an inability to remain neutral than a protection of the peculiar institution. Had the Civil War not taken place, the rate of Choctaw slave ownership possibly would have reached the level of southern states and the Choctaws would be considered part of the South.

This study engaged in pushing the current political limitations created by the political impasse of the Palestinian-Israeli conflict, by imagining new possibilities for radical political change, agency, and subjectivity for both the international activists volunteering with the International Solidarity Movement as well as Palestinians enduring the brutality of life under occupation. The role of the witness and testimony is brought to bear on activism and rhetoric the social movement ISM in Palestine. Approaches the past studies of the rhetoric of social movements arguing that rhetorical studies often disassociated 'social' from social movements, rendering invisible questions of the social and subjectivity from their frames for evaluation. Using the testimonies of these witnesses, Palestinians and activists, as the rhetorical production of the social movement, this study provides an effort to put the social body back into rhetorical studies of social movements. The relationships of subjectivity and desubjectification, as well as, possession of subjects by agency and the role of the witness with each of these is discussed in terms of Palestinian and activist potential for subjectification and desubjectifiation.

Expanding on prior research into the state level causes of terrorism, I argue that state repression and limited state capacity reduces opportunities for non-violent political expression and increases the utility of terrorism. I also argue that economic freedom can is a form of political expression that can dissipate political grievances. While previous authors analyzed some of these variables separately using data on transnational attacks, I created a complete model incorporating the three categories of variables and tested my hypotheses using data that includes both domestic and transnational attacks. I use regression analysis for hypothesis testing and find support for the three primary contentions of this thesis and conclude that limits on political expression increase the likelihood nations will experienced increased levels of terrorism.

To investigate conditions of silver electroless deposition on silicon (100), optical microscope, atomic force microscope (AFM) and attenuated total reflection infrared spectroscopy (ATR-FTIR) spectroscopy were used. Twenty second dipping in 0.8mM AgNO3/4.9% solution coats a silicon (100) wafer with a thin film of silver nanoparticles very well. According to AFM results, the diameter of silver particles is from 50 to 100nm. After deposition, arithmetic average of absolute values roughness (Ra) increased from ~0.7nm to ~1.2nm and the root mean square roughness (Rq) is from ~0.8nm to ~1.5nm. SCN- ions were applied to detect the existence of silver on silicon surface by ATR-FTIR spectroscopy and IR spectra demonstrate SCN- is a good adsorbent for silver metal. Patina is the general name of copper basic salts which forms green-blue film on the surface of ancient bronze architectures. Patina formation has been found on the surface of platinum or ruthenium after several scans of cyclic voltammetry in 2mM CuSO4/0.1M K2SO4, pH5 solution. Evidence implies that oxygen reduction reaction (ORR) triggers the patina formation. ORR is an important step of fuel cell process and only few sorts of noble metals like platinum can be worked as the catalyst of ORR. Mechanisms of patination involving …

This study compares independent use of two known algorithms (Kalmar filter with background subtraction and Particle Filter) that are commonly deployed in object tracking applications. Object tracking in general is very challenging; it presents numerous problems that need to be addressed by the application in order to facilitate its successful deployment. Such problems range from abrupt object motion, during tracking, to a change in appearance of the scene and the object, as well as object to scene occlusions, and camera motion among others. It is important to take into consideration some issues, such as, accounting for noise associated with the image in question, ability to predict to an acceptable statistical accuracy, the position of the object at a particular time given its current position. This study tackles some of the issues raised above prior to addressing how the use of either of the aforementioned algorithm, minimize or in some cases eliminate the negative effects

This thesis presents a novel ZnO-hydrogel based fluorescent colloidal semiconductor nanomaterial system for potential bio-medical applications such as bio-imaging, cancer detection and therapy. The preparation of ZnO nanoparticles and their surface modification to make a biocompatible material with enhanced optical properties is discussed. High quality ZnO nanoparticles with UV band edge emission are prepared using gas evaporation method. Semiconductor materials including ZnO are insoluble in water. Since biological applications require water soluble nanomaterials, ZnO nanoparticles are first dispersed in water by ball milling method, and their aqueous stability and fluorescence properties are enhanced by incorporating them in bio-compatible poly N-isopropylacrylamide (PNIPAM) based hydrogel polymer matrix. The optical properties of ZnO-hydrogel colloidal dispersion versus ZnO-Water dispersion were analyzed. The optical characterization using photoluminescence spectroscopy indicates approximately 10 times enhancement of fluorescence in ZnO-hydrogel colloidal system compared to ZnO-water system. Ultrafast time resolved measurement demonstrates dominant exciton recombination process in ZnO-hydrogel system compared to ZnO-water system, confirming the surface modification of ZnO nanoparticles by hydrogel polymer matrix. The surface modification of ZnO nanoparticles by hydrogel induce more scattering centers per unit area of cross-section, and hence increase the luminescence from the ZnO-gel samples due to multiple path excitations. Furthermore, surface modification of …

In this thesis, I survey 11 approximation algorithms for unweighted set cover problem. I have also implemented the three algorithms and created a software library that stores the code I have written. The algorithms I survey are: 1. Johnson's standard greedy; 2. f-frequency greedy; 3. Goldsmidt, Hochbaum and Yu's modified greedy; 4. Halldorsson's local optimization; 5. Dur and Furer semi local optimization; 6. Asaf Levin's improvement to Dur and Furer; 7. Simple rounding; 8. Randomized rounding; 9. LP duality; 10. Primal-dual schema; and 11. Network flow technique. Most of the algorithms surveyed are refinements of standard greedy algorithm.

Substitution of the 1,5-cyclooctadiene (cod) ligand in PtCl2(cod) (1) by the diphosphine ligand 4,5-bis(diphenylphosphino)-4-cyclopenten-1,3-dione (bpcd) yields PtCl2(bpcd) (2). Knoevenagel condensation of 2 with 9-anthracenecarboxaldehyde leads to the functionalization of the bpcd ligand and formation of the corresponding 2-(9-anthracenylidene)-4,5-bis(diphenylphosphino)-4-cyclopenten-1,3-dione (abpcd) substituted compound PtCl2(abpcd) (3), which is also obtained from the direct reaction of 1 with the abpcd ligand in near quantitative yield. The reaction of 3 with disodium maleonitriledithiolate (Na2mnt) affords the chelating dithiolate compound Pt(mnt)(abpcd) (4). The reaction of PtCl2(bpcd) (2) with 4-methyl-1,2-benzene dithiol under basic conditions affords Pt(tdt)(bpcd) (5). Compounds 2-5 have been fully characterized in solution by IR and NMR spectroscopies (1H and 31P), and their molecular structures established by X-ray crystallography. The electrochemical properties of 2‑5 have examined by cyclic voltammetry, and the nature of the HOMO and LUMO levels in systems 2-4 has been established by MO calculations at the extended Hückel level, the results of which are discussed with respect to electrochemical data and related diphosphine derivatives. In addition the new compounds 2-5 have been isolated by column chromatography and characterized by IR, UV-Vis spectroscopy.

As more toddlers are being diagnosed with autism there is an increased need for very early intervention. Preliminary research on interventions suggests toddlers can make important developmental progress and that parents can be part of the intervention process. The purpose of this study was to systematically replicate a parent training program reported by Alai-Rosales et al. (2009). Specifically, the present study taught parents a set of teaching strategies that included arranging the environment, setting up learning opportunities, and using positive reinforcement. Baseline-intervention conditions were replicated across four parent-toddler dyads in order to assess the effects of training on parent and child behaviors. Results indicated increases in parent teaching behaviors, the child targeted behavior (facial orientation), as well as a non-targeted skill, joint attention. Findings are discussed in relation to the challenges of intervention and considerations for future research.

Cruise travel has become very popular worldwide. The North American cruise market is the world's biggest. Asian countries are among the fastest-growing outbound market for cruise travel. The Taiwanese cruise market has grown substantially. However, few research studies have examined Taiwanese travelers' motivation to experience a cruise vacation, and their satisfaction with the experience. Primary data was collected from a convenience sample of Taiwanese tourists who had been on North American cruise tours. Survey respondents were first time cruisers, over 40 years old, married, and had a Bachelor's degree, or higher. Push and pull motivational factors were identified. Respondents were influenced by recommendations from media and people. Respondents were satisfied with tangibles, cleanliness, food choices and selection, and responsiveness of staff. An overwhelming majority of cruisers would re-visit and recommend this trip. Implications for researchers and practitioners are suggested.

This research is an investigation of the Late Holocene technological transition from the spearthrower and dart to the bow and arrow in north central Texas. It is conducted through a theoretical approach that utilizes ethnographic research, experimental archaeology and the archaeological record to elucidate differences in the behaviors and hunting strategies of Late Archaic and Late Prehistoric groups. It first confirms that there was a transition. Second, a lithic analysis demonstrates that there are fundamental differences in the sizes of the stone dart and arrow points that relate to the propulsive requirements of the weapon systems. Third, it is shown these size differences constrain maintenance potentials and that indeed dart and arrow points exhibit stark differences in their life histories in spite of being employed for the same task. And finally, the faunal record suggests that this transition was associated with an increase in foraging efficiency.

The four elements of the lower hind foot (calcaneus, metatarsal, naviculo-cuboid, and tibia) were tested for use as age-independent proxies of body size in white-tailed deer using known aged specimens from Ft. Hood Texas. Statistical analysis indicates that the calcaneum and the tibia are good proxies of age-independent body size in white-tailed deer. In addition to expanding the list of elements that can be used for studies of age-independent body size, these elements can also be used to age faunal remains to an ordinal scale of juveniles and adults. This is useful for research regarding prehistoric prey populations; as a single element can be used to determine prey body size and age simultaneously, which are the two variables used to assess changes in human subsistence practices via the archaeological remains of their prey.

Skinner (1957) suggested that different verbal operants are acquired independently of each other and establishing a verbal operant as a mand will not necessarily result in the appearance of a tact having the same response form and vice versa. Recent empirical research has found that newly acquired mands and tacts can be transferred to different relations without direct training. The present study investigated 1) how verbal responses taught as pure mands affect untrained tact relations; 2) how verbal responses taught as pure tacts affect untrained mand relations; 3) how the size of mand and tact repertoires relate to speed of acquisition of new mands and tacts; and 4) how size of entering repertoires affect the transfer of mand topographies to tacts and vice versa. Two vocal-verbal children with autism were taught three novel responses as mands and three other responses as tacts. Mand topographies transferred to tact relations and tact topographies transferred to mand relations for both participants. Overall acquisition as well as transfer of mands and tacts was faster for the participant with a higher entering repertoire.

This thesis examines the ways American visual media -television and mainstream/independent cinema- has presented the narrative of child sexual abuse since the beginning of the 21st century. Due to the rise of the counterculture movement and the sexual revolution of the 1960s, a discourse for talking about child sexuality was created. By providing an opportunity to discuss children and sex, for the first time cultural products could deal overtly with child sexual abuse, rather than connotatively. In response to this new discourse, conservative ideals about child sexuality proliferated in the 1970s and 1980s that attempted to return the child to a world of purity and asexuality with all threats to this purity being monstrous. The examples discussed in this thesis highlight the ways that contemporary American visual media has responded to three decades of obsession that created a "master narrative" of child sexual abuse - something that continues to play a significant role in society.