This report focuses on the differences between teachers’ nonverbal behaviors across cultures. It presents the literature review on the effects of teachers’ nonverbal behaviors on students’ motivation, cognitive and affective learning, theories of nonverbal behaviors and cultural dimensions that affect the display of these behaviors across cultures. It indicates the need for further research in the analysis of teachers’ nonverbal behaviors in relation to their culture and the effect of these behaviors on students’ learning. / text

Surfactants both change the wettability and lower the interfacial tension by various degrees depending on the type of surfactant and how it interacts with the specific oil. Ultra low IFT means almost zero capillary pressure, which in turn indicates little oil should be produced from capillary imbibition when the surfactant reduces the IFT in naturally fractured oil reservoirs that are mixed-wet or oil-wet. What is the transport mechanism for the surfactant to get far into the matrix and how does it scale? Molecular diffusion and capillary pressure are much too slow to explain the experimental data. Recent dynamic laboratory data suggest that the process is faster when a pressure gradient is applied compared to static tests. A mechanistic chemical compositional simulator was used to study the effect of pressure gradient on chemical oil recovery from naturally fractured oil reservoirs for several different chemical processes (polymer, surfactant, surfactant-polymer, alkali-surfactant-polymer flooding). The fractures were simulated explicitly by using small gridblocks with fracture properties. Both homogeneous and heterogeneous matrix blocks were simulated. Microemulsion phase behavior and related chemistry and physics were modeled in a manner similar to single porosity reservoirs. The simulations indicate that even very small pressure gradients (transverse to the flow in the fractures) are highly significant in terms of the chemical transport into the matrix and that increasing the injected fluid viscosity greatly improves the oil recovery. Field scale simulations show that the transverse pressure gradients promote transport of the surfactant into the matrix at a feasible rate even when there is a high contrast between the permeability of the fractures and the matrix. These simulations indicate that injecting a chemical solution that is viscous (because of polymer or foam or microemulsion) and lowers the IFT as well as alters the wettability from mixed-wet to water-wet, produces more oil and produces it faster than static chemical processes. These findings have significant implications for enhanced oil recovery from naturally fractured oil reservoirs and how these processes should be optimized and scaled up from the laboratory to the field. / text

Commonly known as nueva canciόn in Puerto Rico or nueva trova in Cuba, “new song” is a 60-year-old genre, a musical form resonant with political overtones. This thesis examines the life and music of Lourdes Pérez, a Puerto Rican singer working in the nueva canciόn tradition. Pérez, who has lived in the U.S. for 20 years, is dedicated through her compositions to create a “newer song,” a form of socially engaged music based on artists of the past but addressing contemporary issues. Through the creation of a diverse community for such music, and collaborations with other Latin American musicians and artists, Pérez has taken the genre in new directions. I examine the various sociopolitical messages conveyed in Pérez’s music through an analysis of the extramusical context of performance. I raise questions about the ways in which globalization affects her work, and about the present-day relevance of the nueva canción song form itself. Since little research has been conducted on nueva canciόn I hope this paper will encourage future work. / text

In this research I address the phenomenon of female fans’ fascination with online boys’ love fiction in China, and the discussion centers on the questions of why these women are interested in the boys’ love theme, why they prefer boys’ love to traditional heterosexual romance, and how they define and identify with male–male relationships in the boys’ love fiction. Through focusing research on a popular Chinese online-fiction website for women (www.jjwxc.net), I use historical review, online observations, and content analysis of online boys’ love fiction to collect data on my research questions. Understanding female fans’ expectation of and attitudes towards love and romance and analyzing the content of boys’ love fiction allow for a comprehension of the interactions of gender, sexuality, identity, and culture in shaping these women’s practice and choice of boys’ love genre in China. / text

The goal of the study presented in this thesis was the improvement of estimation and monitoring procedures for condition monitoring of belt tension and misalignment in belt-driven automated material handling systems widely used in modern semiconductor manufacturing systems. In pursuit of this goal, two 3-factor, 3-level experiments were designed to study how belt vibration characteristics depend on changes in belt length, belt tension, belt misalignment, and initial location of the excitation of belt vibration. Dependent variables in each of the experiments were drawn from a denoised frequency spectrum calculated from an Autoregressive model of the belt vibration time-series. A feature vector was developed from the Autoregressive features via variance based sensitivity analysis. Results showed that belt vibration characteristics were sensitive to changes in all of the independent variables examined. These results motivated the design of a device to improve the standardized technique widely used to monitor belt tension in belt-driven material handling systems. Reducing variance in the belt length and the location of the initial excitation of belt vibration yielded a reduction of tension estimate standard deviation an order of magnitude, as compared to a human performing the standardized technique. Thus, the use of this device provided higher belt tension estimate resolution. Future work that could lead to a less intrusive technique is presented. / text

Hierarchical Linear Models were used to analyze data from one Texas school and identify effective and ineffective mathematics teachers using their students’ scores on two consecutive years of the state test (TAKS) over a three-year period. A model was developed which attempted to control for student grade level, as well as whether a class was an honors course. Special attention was paid to requiring statistically significant results. Results were minimal and may lack validity. The barriers to getting better results include missing data, the small sample size of students for an individual teacher, the non-random assignment of teachers to courses, and the extent of variability in the data. Most of these are beyond the control of educators. A better way of measuring student growth could reduce variability and improve the prospects of using a data driven approach to evaluate teachers. / text

The proposed study will investigate the dimensions of the relationship between three conceptualizations of African-centered worldview (ACWV) and racial identity (RI) attitudes in a sample of African American college students. A canonical correlation analysis will be conducted to explain the relationship between the ACWV variable set and the RI attitudes variable set. It is hypothesized there will be several significant correlations and multiple linear correlations (i.e., dimensions) between the variable sets. Specifically, it is hypothesized that endorsement of each conceptualization of ACWV will be negatively related to Pre-encounter RI attitudes. It is also hypothesized that each conceptualization of ACWV will differentially predict identity salient RI attitudes. Implications and limitations of this study will be discussed. / text

This thesis examines the ways in which American Idol producers rely on the white, Christian, heterosexual, middle-class, Americanness of contestants’ bodies and identities to advance the show’s American Dream narrative. When contestants do not meet all four of the components of Americaness, producers highlight some aspects of the contestants’ identities while hiding other truths about who they are. Additionally, those contestants who are able to adhere simultaneously to their producer-constructed personas while also asserting their individuality tend to fair best in the competition. / text

A computational model has been developed to study the effects of left ventricular assist devices (LVADs) on the cardiovascular system during a ventricular collapse. The model consists of a toroidal pulsatile blood pump and a closed loop circulatory system. Together, they predict the pump's motor current traces that reflect ventricular suck-down and provide insights into torque magnitudes that the pump experiences. In addition, the model investigates likeliness of a suction event and predicts reasonable outcomes for a few test cases. Ventricular collapse was modeled with the help of a mock circulatory loop consisting of a artificial left ventricle and centrifugal continuous flow pump. This study also investigates different suction detection schemes and proposes the most suitable suction detection algorithm for the TORVAD pump, toroidal left ventricular assist device. Model predictions were further compared against the data sampled during in vivo animal trials with the TORVAD system. The two sets of results are in good accordance. / text

The purpose of this report is to evaluate the potential utility of online social networking in enhancing participation in, and maintenance of, a university-based exercise program through the provision of social support. Ninety-one employees previously enrolled in an exercise program were surveyed. Participants were asked about their online social networking habits and their opinions on the possible use of online social networks to increase social support for and adherence to an exercise program. Respondents already belonging to a social networking site (SNS) (79%) were optimistic about the utility, particularly after their exercise program, while those who do not belong to an SNS were less positive. The findings imply that using online social networking to add social support both during and after an exercise program could be effective. / text