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Full-Text Articles in Arts and Humanities

Mothers’ Versus Fathers’ Ratings Of Child Behavior Problems, Jessica K. Curley Dec 2005

Mothers’ Versus Fathers’ Ratings Of Child Behavior Problems, Jessica K. Curley

Graduate Theses and Dissertations

The goal of this study was to examine how mothers and fathers view children's internalizing and externalizing behavior problems. More specifically, the relationship between certain factors, such as parental psychological symptoms, levels of interparental conflict, characteristics of the behaviors, and discrepancies in mothers' and fathers' ratings of behavior problems were studied in more depth. Using a between subjects, experimental design, mothers and fathers were randomly assigned to view a videotape and rate the behavior of a male or female child acting in either an internalizing, externalizing, or non-clinical manner. Results showed that there were no differences between mothers' and ...


The Effects Of Fluency Training On Performance, Maintenance, And Generalization Of Parenting Skills, Gertie Williams Dec 2005

The Effects Of Fluency Training On Performance, Maintenance, And Generalization Of Parenting Skills, Gertie Williams

Graduate Theses and Dissertations

The effects of fluency training on performance, maintenance, and generalization of parent training skills were examined within the context of a classroom and home setting. Three foster parents attended a 24-hour Parenting Tools for Positive Behavior Change (PBC) course. Participants completed timed fluency drills using flash cards to increase learning and performance of PBC tools. A non-concurrent multiple baseline design across participants was used to assess participant performance on flash card drills and PBC tools during in-class, pre-test, and post-test role plays, and in novel situations with children in the home before, during and after the course. Results showed that ...


The Solubility Of Triton X-114 And Tergitol 15-S-9 In High-Pressure Carbon Dioxide Solutions, Brandon Smeltzer Dec 2005

The Solubility Of Triton X-114 And Tergitol 15-S-9 In High-Pressure Carbon Dioxide Solutions, Brandon Smeltzer

Graduate Theses and Dissertations

In the sol gel production of high surface area catalyst, the template, a surfactant, is

the key component of the process. A template too soluble in the supercritical dryingextraction

process can yield a catalyst with a lower surface area. A template completely

insoluble in the supercritical drying-extraction process can lead to a longer calcinations

step and lower catalyst surface area. Template recovery also enhances the economic

feasibility of plant scale production of high surface area catalyst. For these reasons

knowing surfactant solubility in supercritical media is important.

The solubility of surfactants tert-octylphenoxypolyethoxyethanol (commercially

available and hereafter referred to as Triton ...


Attitudinal Antecedents Of The First- And Third-Person Effect Of Alcohol Advertising On College Students, Georgia Begin Dec 2005

Attitudinal Antecedents Of The First- And Third-Person Effect Of Alcohol Advertising On College Students, Georgia Begin

Graduate Theses and Dissertations

Data collected from a survey questionnaire via personal interviews among 488 college students was used to examine relationships among attitude toward alcohol advertising, attitude toward alcohol beverages, perceived influence of alcohol advertising on oneself, perceived influence of alcohol advertising on others, and attitude toward restrictions of alcohol advertising. Results supported the hypothesized direct effect of advertising attitudes and product attitudes on attitude toward restrictions. Also supported was the indirect effect of advertising and product attitudes on attitudes toward restricting alcohol advertising via such mediators as perceived influence of the ads on self and others using the theories of first- and ...


Reducing Pollutants In Industrial Stormwater Runoff: Improved Water Quality Protection Using Prioritized Facility Regulation, Lindsay M. Griffen Oct 2005

Reducing Pollutants In Industrial Stormwater Runoff: Improved Water Quality Protection Using Prioritized Facility Regulation, Lindsay M. Griffen

Graduate Theses and Dissertations

Stormwater pollutants originating from industrial facilities can lead to degraded

water quality, even in residentially dominated regions of the country. The National

Pollutant Discharge Elimination System permit program regulates stormwater pollutants

generated at industrial sites using Multi-Sector General Permits (Generic permits) for

industrial facilities and a permit requirement for Municipal Separate Storm Sewer System

(MS4) operators. All industrial facilities within 11 broad categories of industry are

responsible for self-identifying the need to comply with the Generic permit, and

subsequently, implementing self-selected pollution prevention strategies. MS4 operators

are required to identify and inspect “high risk” industrial and commercial facilities that

may ...


Reconstructing Writer Identities, Student Identities, Teacher Identities, And Gender Identities: Chinese Students In America, Peiling Zhao Jun 2005

Reconstructing Writer Identities, Student Identities, Teacher Identities, And Gender Identities: Chinese Students In America, Peiling Zhao

Graduate Theses and Dissertations

The increasing presence of Chinese international graduate students in American higher education has mandated a closer examination on their multi-faceted life. Their different ways of writing, learning, teaching, and conceiving gender have provoked numerous scholarships vehemently exploring and significantly shedding light on the myriad differences as well as commonalities between American and Chinese cultures. However, they have been repeatedly stereotyped in various discourses where binary thinking and essentialism are still prevalent. In contrastive rhetoric, Chinese students are dichotomozied as feminine, indirect, reader-responsible, and collectivist writers against Western writers who are masculine, direct, writer-responsible, and individualistic.

This binary thinking is reinforced ...


The Effect Of Knowledge Gain On Capital Punishment: A Partial Test Of The Marshall Hypothesis, Alexander Able Savon Jun 2005

The Effect Of Knowledge Gain On Capital Punishment: A Partial Test Of The Marshall Hypothesis, Alexander Able Savon

Graduate Theses and Dissertations

Justice Thurgood Marshall proposed a three-pronged postulate in his dissent in1972 in the Furman v. Georgia (408 U.S. 238) Supreme Court case. The Americanpublic is generally uninformed when it comes to the death penalty, and given informationa great mass of citizens would be against it, unless their underlying beliefs were rootedin retribution (Furman v. Georgia, p. 363). These statements subsequently came to beknown as the Marshall Hypothesis, and were deemed testable by researchers.This study examines the influence on death penalty opinion as a consequence ofparticipating in a college class on the death penalty. Students in the class, who ...


Examining The Attitudes Toward Mathematics Of Preservice Elementary School Teachers Enrolled In An Introductory Mathematics Methods Course And The Experiences That Have Influenced The Development Of These Attitudes, Joy Bronston Schackow Jun 2005

Examining The Attitudes Toward Mathematics Of Preservice Elementary School Teachers Enrolled In An Introductory Mathematics Methods Course And The Experiences That Have Influenced The Development Of These Attitudes, Joy Bronston Schackow

Graduate Theses and Dissertations

The reform movement in mathematics education has recognized affective factors as an important area where change is needed. This study examined the attitudes toward mathematics of preservice elementary teachers entering an introductory mathematics methods course. The methods course utilized constructivist instructional methods, such as the use of manipulatives, cooperative group work, problem solving, and calculators. Qualitative methods were used to explore participants attitudes toward mathematics and the experiences that have led to the development of these attitudes. The study sought to determine the extent to which preservice teachers attitudes toward mathematics changed during the methods course and the correlation between ...


Effects Of Long-Term Administration Of Caffeine In A Mouse Model For Alzheimer's Disease, William Schleif Jun 2005

Effects Of Long-Term Administration Of Caffeine In A Mouse Model For Alzheimer's Disease, William Schleif

Graduate Theses and Dissertations

A recent epidemiological study suggested that higher caffeine intake reduces the risk of Alzheimer's disease (AD). Caffeine, a widely consumed stimulatory drug, is a non-selective adenosine receptor antagonist that has been shown to increase plasma adenosine levels in rodents. To determine any long-term protective effects of caffeine in a controlled longitudinal study, caffeine was added to the drinking water of APPsw transgenic (Tg) mice between 4 and 9 1/2 months of age, with behavioral testing done during the last 6 weeks of treatment. The average daily intake of caffeine per mouse (1.5 mg) was the human equivalent ...


A Vascular Plant Inventory And Description Of The Twelve Plant Community Types Found In The University Of South Florida Ecological Research Area, Hillsborough County, Florida, Anne Candace Schmidt Jun 2005

A Vascular Plant Inventory And Description Of The Twelve Plant Community Types Found In The University Of South Florida Ecological Research Area, Hillsborough County, Florida, Anne Candace Schmidt

Graduate Theses and Dissertations

The University of South Florida Ecological Research Area (USF Eco Area), located in west central Hillsborough County, is an approximately 306 hectare (756 acre) natural area on the Hillsborough River composed of twelve plant communities. While surrounded on three sides by urbanization, the USF Eco Area makes up the western most section of an extended natural corridor that runs approximately 88 kilometers (55 miles) east and north along the Hillsborough River. An inventory of the vascular flora and the associated ecological communities was developed to better assess the USF Eco Area for educational and research purposes as well as enhance ...


Creation, Analysis, And Evaluation Of Remote Sensing Sinkhole Databases For Pinellas County, Florida, Larry D. Seale Jun 2005

Creation, Analysis, And Evaluation Of Remote Sensing Sinkhole Databases For Pinellas County, Florida, Larry D. Seale

Graduate Theses and Dissertations

A database of likely sinkholes in Pinellas County, Florida, created using airborne laser swath mapping (ALSM a.k.a LIDAR for light detection and ranging), correlates poorly with other databases of likely sinkholes created from modern and historic aerial photographs. Urbanization appears to be the cause of the poor correlation. Buildings obscure much of the ground surface in urban areas, and many man-made depressions can be confused with natural sinkholes. Additionally, the lack of air photos contemporaneous with the ALSM data hinders ALSM analysis in rapidly developing areas. Selecting a lightly-developed portion of the county for further study reduced the ...


An Analysis Of Pedagogical Strategies: Using Synchronous Web-Based Course Systems In The Online Classroom, Shauna J. Schullo Jun 2005

An Analysis Of Pedagogical Strategies: Using Synchronous Web-Based Course Systems In The Online Classroom, Shauna J. Schullo

Graduate Theses and Dissertations

This study investigated a synchronous web-based course system (SWBCS) as a supplement todistance learning courses. Although challenges exist (such as the complex interface and potentialtechnological problems); these systems hold the potential to enhance the distance learning experiencethrough increased interaction, immediacy, social presence, group work, and collaboration.Using a rigorous blend of research methods, the study investigated the following questions: (1) what types of pedagogical strategies do instructors implement, (2) how do instructors utilize the tools, (3) which tools do instructors choose to use, (4) why do instructors use the tools and strategies that they choose, and (5) what perceptions do ...


Ammonium Distribution And Dynamics In Relation To Biological Production And Physical Environment In The Marguerite Bay Region Of The West Antarctic Peninsula, Yulia Mikhailovna Serebrennikova Jun 2005

Ammonium Distribution And Dynamics In Relation To Biological Production And Physical Environment In The Marguerite Bay Region Of The West Antarctic Peninsula, Yulia Mikhailovna Serebrennikova

Graduate Theses and Dissertations

In this study, biogeochemical regimes of Marguerite Bay and the adjacent part of the West Antarctic Peninsula (WAP) continental shelf were delineated through integration of nutrient, hydrographic, and biological measurements obtained during the LTER and SO GLOBEC studies during austral summer, autumn, and winter of 2001 and 2002.Marguerite Bay biogeochemical regime was found to differ from those of the adjacent WAP continental shelf. In terms of Treguer and Jacques (1992), Marguerite Bay is a combination of Coastal Continental Shelf Zone (CCSZ) and Seasonal Ice Zone (SIZ) distinguished by shallow mixing regime, high primary production and export production. At the ...


Assessment Of Invasive Activities Of Ovarian Cancer Cells In Vitro, Hetal Shah Jun 2005

Assessment Of Invasive Activities Of Ovarian Cancer Cells In Vitro, Hetal Shah

Graduate Theses and Dissertations

The interactions between neighboring cells and between cells and their attached substrate have long been studied in tissue culture. These in vitro studies may provide information regarding cell behavior in vivo including cell movement, cell proliferation, tissue development and wound healing. Transcellular resistance (or impedance) measurements, using various dc or ac techniques have been used to study the barrier function of epithelial and endothelial cell layers. With an appropriate equivalent circuit used for data analysis, junctional resistance between cells and other cellular properties, including cell membrane capacitance, can be determined. However, these techniques have seldom been applied to fibroblastic cell ...


Stability Studies Of Cdte/Cds Thin Film Solar Cells, Bhaskar Reddy Tetali Jun 2005

Stability Studies Of Cdte/Cds Thin Film Solar Cells, Bhaskar Reddy Tetali

Graduate Theses and Dissertations

CdTe/CdS solar cells have shown great potential for terrestrial solar power applications. To be commercially viable they need to operate efficiently for about 30 years. CdS/CdTe solar cells fabricated at USF have shown record efficiencies upto 16.5% [46]. This research involves the study of thermal stress (TS) and light soaking (LS) on the stability of high efficiency (>10%) solar cells. The change in key electrical parameters Voc, FF, Jsc, A and Jo are quantified for more than 2000 hours of stressing. The device degradation was found to increase with stress temperature for TS. Below 100oC, the changes ...


Sedimentation Patterns And Hydrodynamics Of A Wave-Dominated Tidal Inlet: Blind Pass, Florida, David K. Tidwell Jun 2005

Sedimentation Patterns And Hydrodynamics Of A Wave-Dominated Tidal Inlet: Blind Pass, Florida, David K. Tidwell

Graduate Theses and Dissertations

Blind Pass, a heavily structured wave-dominated tidal inlet on the west central coast of Florida, has undergone substantial morphologic changes in the past 150 years. Initially Blind Pass was a mixed-energy inlet. In 1848 a hurricane opened a new inlet to the north called Johns Pass, which captured a large portion of the tidal prism of Blind Pass. Since then Blind Pass migrated southward until it was structurally stabilized in 1937. The decreasing tidal prism resulted in significant inlet channel filling. The channel has been dredged 12 times since 1937. The present inlet is stabilized by two jetties and a ...


Interaction Patterns And Web-Structures Of Resonant Solitons Of The Kadomtsev-Petviashvili Equation, Anupama Tippabhotla Jun 2005

Interaction Patterns And Web-Structures Of Resonant Solitons Of The Kadomtsev-Petviashvili Equation, Anupama Tippabhotla

Graduate Theses and Dissertations

In this thesis, the interaction pattern for a class of soliton solutions of the Kadomtsev- Petviashvili (KP) equation is analyzed. The complete asymptotic properties of the soliton solutions for are determined. The resonance characteristic of two sub-classes of the soliton solutions, in which incoming line solitons for interact to form outgoing line solitons for , is described. These two specific sub-classes of -soliton solutions are the following: 1) [(2, 3), (2, 4), (2, 5)], 2) [(3, 2), (3, 3), (3, 4)]. The intermediate solitons and the interaction regions of the above soliton solutions are determined, and their various interaction patterns are ...


Microfinance In Neoliberal Times: The Experience Of An Egyptian Ngo, Sarah A. Tobin Jun 2005

Microfinance In Neoliberal Times: The Experience Of An Egyptian Ngo, Sarah A. Tobin

Graduate Theses and Dissertations

Development non-governmental organizations (NGOs) are under immense pressure to adhere to the programs and methods put forth by external donors, particularly if the NGOs rely on the funding to sustain their own organizations. Those external donors that represent neoliberal ideologies and enforce neoliberal practices, particularly in the area of microfinance, maintain a power that most recipient NGOs cannot evade. This becomes a difficult position for the NGOs to navigate as they try to accomplish good work in their communities. This research project is a study into the experience of one NGO, the Egyptian Development Organization (EDO), as it implemented microfinance ...


Victimization And Academic Achievement At School: The Role Of Psychosocial Mediators And Moderators, Christine Marie Wienke Totura Jun 2005

Victimization And Academic Achievement At School: The Role Of Psychosocial Mediators And Moderators, Christine Marie Wienke Totura

Graduate Theses and Dissertations

The present study sought to examine the relationship between victimization by peers in middle school and academic outcomes. it was expected that an association between the experience of victimization and diminished academic performance would be mediated by poor psychological outcomes, as measured by moodiness, depression, anxiety, and anger. additionally, it was hypothesized that academic outcomes could be divided into two distinct constructs, motivation and achievement, with motivation and academic goal-orientation variables preceding the adequate attainment of school grades and standardized test scores. therefore, the present mediated model was tested using a structural equation modeling technique: victimization-psychological functioning-academic motivation-academic achievement. additionally ...


Detection Of Pathogenic Bacteria And Fecal Enterococci In Recreational Water With An Evanescent Wave Fiber Optic Biosensor, Maria Theresa Trindade Jun 2005

Detection Of Pathogenic Bacteria And Fecal Enterococci In Recreational Water With An Evanescent Wave Fiber Optic Biosensor, Maria Theresa Trindade

Graduate Theses and Dissertations

Development of a rapid method for the detection of fecal enterococci and pathogenic microorganisms in beach water was attempted utilizing an evanescent wave fiber optic biosensor. Various assay formats including a sandwich immunoassay were tested in the development of a rapid assay. Fluorophore labeled antibodies were used for specific detection of bacteria captured or adsorbed directly to the surface of a polystyrene fiber optic waveguide. Binding of the fluorescent labeled antibody to its specific target or binding of a fluorescent labeled anti-IgG within 100-1000 nm of the waveguide surface caused excitation of the fluorescent conjugate resulting in a quantifiable signal ...


Numerical Modeling Of Cds/Cdte Thin Film Solar Cell Using Medici, Gokul Muthuswamy Jun 2005

Numerical Modeling Of Cds/Cdte Thin Film Solar Cell Using Medici, Gokul Muthuswamy

Graduate Theses and Dissertations

Thin Film CdS/CdTe Solar cells have been an attrative alternative to silicon solar cells because of their low cost. Numerical Modeliong using using various tools pertinent only to solar cells have been employed to study the device properties. In this work a powerful device simulation tool MEDICI is used to develop a quantitative device model. The model is modified to accommodate a glass layer and an AM1.5 spectrum is used as the simlation of light source. Analysis of the response of solar cell J-V parameters like voc and Jsc to changes in acceptor concentration, CdTe thickness and changes ...


Cloning, Expression, And Sequence Analysis Of Camelysin, A Zinc Metalloprotease From Bacillus Anthracis And B. Cereus, Andrew Ross Myers Jun 2005

Cloning, Expression, And Sequence Analysis Of Camelysin, A Zinc Metalloprotease From Bacillus Anthracis And B. Cereus, Andrew Ross Myers

Graduate Theses and Dissertations

Bacillus anthracis and B. cereus are well known etiological agents, which cause disease in healthy and immunocompromised individuals. Considering the abundance and lethality of these organisms it is imperative that research is performed to identify and analyze new factors that may contribute to their pathogenicity. Camelysin is a membrane bound, zinc metalloprotease isolated from B. cereus. Assays performed on purified camelysin demonstrate that the protease exhibits fibrinolytic, collagenolytic, and actin degradation activity, any of which can contribute to the organisms ability to invade host tissues and cause damage. Considering the putative role of camelysin in pathogenicity, it would be beneficial ...


Bio-Optical Variability Of Surface Waters In The Northeastern Gulf Of Mexico, Bisman Nababan Jun 2005

Bio-Optical Variability Of Surface Waters In The Northeastern Gulf Of Mexico, Bisman Nababan

Graduate Theses and Dissertations

Bio-optical variability of surface waters in Northeastern Gulf of Mexico (NEGOM) was examined using satellite and in situ data. Relatively high chlorophyll-a concentration (chl>1 mg m-3) and high colored dissolved organic mater (ag443>0.1 m-1) were generally observed inshore, near major river mouths, and in plumes of Mississippi River water that extended offshore during the three consecutive summer seasons (1998, 1999, and 2000). River discharge dominated chlorophyll-a concentration variability inshore, particularly near major river mouths. Strong interannual variability in chlorophyll-a concentration was observed inshore from Escambia to Tampa Bay region during the winter to spring transition, which was ...


Changes In The Sense And Perception Of Self In Individuals With Aphasia: An Ethnographic Study, Erline Vieira Nakano Jun 2005

Changes In The Sense And Perception Of Self In Individuals With Aphasia: An Ethnographic Study, Erline Vieira Nakano

Graduate Theses and Dissertations

Little is known about the perceived changes in identity and sense of self in individuals with aphasia. Seminal research using qualitative methods and personal narratives has been conducted in England regarding the experience of living with aphasia (see for instance Parr, Byng, Gilpin & Ireland, 1999; Parr, Duchan & Pound, 2003; Byng, Pound & Hewitt, 2004), but the use of such methodologies is still emergent in the United States. In addition, despite the great achievements of the disabilities movement in countries such as the U.S. and the U.K., individuals with aphasia have remained largely at the margins due to the very nature of their impairment ...


Auction Performance Evaluation In Deregulated Electricity Markets, Vishnuteja Nanduri Jun 2005

Auction Performance Evaluation In Deregulated Electricity Markets, Vishnuteja Nanduri

Graduate Theses and Dissertations

In a deregulated electricity market, auction serves as a primary pricing tool in various segments of the market including day-ahead, real time, ancillary services markets, and Financial Transmission Rights (FTRs) market. Deregulated power markets around the world use different auction strategies that exist in the literature, since very little comparative guidelines exist as to the relative merits of these strategies. In this thesis, a computational methodology and its solution framework are developed to evaluate the impact of an auction strategy on the equilibrium prices in a constrained network with multiple generators at nodes, and where transactions are settled using the ...


The Effects Of The Presence Of A Dog On The Social Interactions Of Children With Developmental Disabilities, Stephanie Walters Jun 2005

The Effects Of The Presence Of A Dog On The Social Interactions Of Children With Developmental Disabilities, Stephanie Walters

Graduate Theses and Dissertations

The effects of the presence of a dog on the social interactions between children with developmental disabilities and their teacher were analyzed in this study. We examined whether the presentation of a dog would improve the social interactions of three children with developmental disabilities. A baseline condition consisting of the child and teacher in the presence of three toys, one of which was a toy dog was followed by an intervention in which a real dog was added to the sessions. A multiple baseline design across participants was employed to assess experimental changes in interactions during the intervention condition. All ...


Development Of Laser System To Measure Pavement Rutting, Hongzhi Wang Jun 2005

Development Of Laser System To Measure Pavement Rutting, Hongzhi Wang

Graduate Theses and Dissertations

Asphalt pavement rutting is one of the most common and destructive pavement distresses observed on U.S. roads, particularly in the urban environment at intersections. They are an important indicator of the structural integrity of the pavement as well as having an impact on road user safety. For these reasons, most road agencies regularly monitor the levels of rut depths on their pavement. There are four technologies used for estimating rut depth in automated measurement way: ultrasonics, point lasers, scanning lasers, Optical. This thesis will focus on the development of the laser scanner rut depth measurement system, including the improvement ...


Strain, Personality Traits, And Deviance Among Adolescents: Moderating Factors, Jennifer J. Wareham Jun 2005

Strain, Personality Traits, And Deviance Among Adolescents: Moderating Factors, Jennifer J. Wareham

Graduate Theses and Dissertations

General strain theory has received a fair amount of empirical support and theoretical elaboration over the past several years. Since the introduction of general strain theory, Agnew and others have attempted to increase the comprehensiveness of the processes involved in strain theory. Until recently, the general strain theory literature has ignored what Agnew and associates (Agnew, Brezina, Wright, & Cullen, 2002) argue may be one of the most important conditioning effects of the strain-crime relationship, namely the dispositions or personality traits of the individual experiencing strain. Recently, Agnew and associates (2002) published results from a study examining the conditioning effects of personality traits (i.e., negative emotionality and low constraint) on the strain-delinquency relationship. Their findings indicated that certain personality traits significantly condition the effect of strain on delinquency. Research has suggested that more severe personality

and behavioral traits, such as psychopathy, also influence criminality. The present study examined moderating effects of both personality dispositions and psychopathic behavioral features among a sample of 137 youths referred to juvenile diversion by the court system. The results suggest that personality dispositions and psychopathic behavioral features do not significantly moderate the strain-delinquency relationship. In addition, this study conducted ad hoc analyses examining whether or not delinquency significantly increases the likelihood that subsequent strain and delinquency will result (i.e., a state dependence explanation (see Nagin & Farrington, 1992; Nagin & Paternoster, 1991)). Moderating effects of personality and psychopathy were also included in this model. Further, the role of strain as a mediator for the personality and psychopathy link to delinquency was tested. The findings suggest that delinquency exacerbated subsequent strain and ...


Effect Of Fiber Volume Fraction On Fracture Mechanics In Continuously Reinforced Fiber Composite Materials, Thomas Wasik Jun 2005

Effect Of Fiber Volume Fraction On Fracture Mechanics In Continuously Reinforced Fiber Composite Materials, Thomas Wasik

Graduate Theses and Dissertations

The application of advanced composite materials, such as graphite/epoxy, has been on the rise for the last four decades. The mechanical advantages, such as their higher specific stiffness and strength as compared to monolithic materials, make them attractive for aerospace and automotive applications. Despite these advantages, composites with brittle fibers have lower ductility and fracture toughness than monolithic materials.One way to increase the fracture toughness of composites is to have a weak fiber-matrix interface that would blunt crack tips by crack deflection into the interface and hence enhance fracture toughness. However, this also reduces the transverse properties of ...


The Effects Of Moisture On Thin Film Delamination And Adhesion, Patrick Waters Jun 2005

The Effects Of Moisture On Thin Film Delamination And Adhesion, Patrick Waters

Graduate Theses and Dissertations

Significant drops in adhesion have been measured for copper and diamond like carbon (DLC) films with the introduction of water at the film/substrate interface. A 1 thick tungsten superlayer with high compressive residual stress was deposited on the films of interest to help induce interfacial debonding by indentation. Modifications were made to the superlayer indentation technique to introduce water at the interface while performing indents. Film adhesion dropped by a factor of 10 to 20 for the copper films and 50 to 60 for the DLC films. The reduction in adhesion is believed to be caused by a combination ...