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<p>Intercultural communication (ICC) is one of the most relevant fields for investigation in post-colonial Africa and post-apartheid South Africa, given the movements between people from African countries and the wide range of attractions, both economic and social, that South Africa holds for people from other African countries. This study reports on intercultural communication in post-democratic South Africa in an era marked by what Appadurai (1990) calls &lsquo / flows&rsquo / . Greenmarket Square in the heart of Cape Town, well known as a hub for informal traders, local people and tourists, was chosen as the site for this study, because of the rich cultural diversity of the role-players. The principal aim of this research is to examine how people from different cultural backgrounds in this particular space of Greenmarket Square communicate with one another, and where the &lsquo / intercultural fault-lines&rsquo / (Olahan, 2000) occur, keeping in mind how ICC could be improved in such a space. My position as a trader in the market placed me in an ideal &lsquo / insider&rsquo / position to do the research. The theory of spatiality (Vigouroux, 2005 / Blommaert et al. 2005) was used to show how the space of Greenmarket Square affected intercultural communication. Discourse analysis was also applied to the data to show how the various roleplayers were socially constructed by others. Saville-Troike&rsquo / s (1989) ethnography of communicative events was also used to bring out other barriers that were not identified by spatiality and discourse analysis. Aspects like scene, key, message form and content, the observed rules for interaction and where these rules were broken and to what effect as well as the norms for interpretation were considered during the analysis of this qualitative data. The analysis showed that spatiality, social constructions of &lsquo / the other&rsquo / and other factors like nonverbal communication and differences between communicative styles in high and low context cultures (LCC/HCC), had a major impact on intercultural communication at Greenmarket Square, frequently leading to complete breakdowns in communication. Many of the traders interviewed acknowledged that they needed to improve their competence in intercultural communication. The study concludes with a number of recommendations on how people can become more &ldquo / interculturally competent&rdquo / (Katan, 2004) in a globalized world.</p>

According to the United States Department of Defense (DOD), as of 2013 there were over 12,000 DOD contractors supporting the U.S. mission in Iraq (DASD, 2013). This thesis explores the laws and legal systems that operate to keep contractors, and the companies that employ them, resistant to legal oversight. I ground my analysis in the 2007 Nisour Square massacre, exploring how every attempt to prosecute those responsible was doomed due to Blackwater’s legal position of being American-headquartered, hired by the State Department, privately owned, and operating in Iraq. I conclude that the legal indeterminacy of the US deployed security contractor normalizes violence towards Iraqi civilians while simultaneously downloading the risk and responsibility associated with the US war efforts onto the shoulders of individual contractors. Moreover, I suggest that this legal indeterminacy is of particular interest to geographers as it arises, in part, out of overlapping legal systems, jurisdictions, and authorities.

According to the United States Department of Defense (DOD), as of 2013 there were over 12,000 DOD contractors supporting the U.S. mission in Iraq (DASD, 2013). This thesis explores the laws and legal systems that operate to keep contractors, and the companies that employ them, resistant to legal oversight. I ground my analysis in the 2007 Nisour Square massacre, exploring how every attempt to prosecute those responsible was doomed due to Blackwater’s legal position of being American-headquartered, hired by the State Department, privately owned, and operating in Iraq. I conclude that the legal indeterminacy of the US deployed security contractor normalizes violence towards Iraqi civilians while simultaneously downloading the risk and responsibility associated with the US war efforts onto the shoulders of individual contractors. Moreover, I suggest that this legal indeterminacy is of particular interest to geographers as it arises, in part, out of overlapping legal systems, jurisdictions, and authorities.

Empirical likelihood (EL) is a recently developed nonparametric method of statistical inference. Owen’s 2001 book contains many important results for EL with uncensored data. However, fewer results are available for EL with right-censored data. In this dissertation, we first investigate a right-censored-data extension of Qin and Lawless (1994). They studied EL with uncensored data when the number of estimating equations is larger than the number of parameters (over-determined case). We obtain results similar to theirs for the maximum EL estimator and the EL ratio test, for the over-determined case, with right-censored data. We employ hazard-type constraints which are better able to handle right-censored data. Then we investigate EL with right-censored data and a k-sample mixed hazard-type constraint. We show that the EL ratio test statistic has a limiting chi-square distribution when k = 2. We also study the relationship between the constrained Kaplan-Meier estimator and the corresponding Nelson-Aalen estimator. We try to prove that they are asymptotically equivalent under certain conditions. Finally we present simulation studies and examples showing how to apply our theory and methodology with real data.

Activity and fitness levels decline through the years from 30 to 60 years of age. Minimal research is available regarding functional assessment tools in this population. Reliable functional tools are needed to reintroduce individuals to appropriate physical activity levels following an injury and to maintain high levels of participation through their lifespan. The purposes of this study were multiple: 1) determine if three functional tests correspond with neuromotor fitness levels, 2) establish a model of functional tests, activity levels and descriptive data that distinguishes the most from the least fit, 3) describe expected mean functional test performances, and 4) demonstrate the reliability of the three functional tests in a sample of 30-60 year olds. 63 females and 38 males completed activity surveys, a neuromotor fitness test, the star excursion balance test (SEBT), the four square step test (FSST), and the Biering-Sorensen test of trunk extensor muscle endurance. Moderate to high reliability of the functional tests was determined with 29 subjects. The SEBT (r=.97), FSST (r=.88) and the Biering-Sorensen test (r=.64) were reliable. All functional tests were able to distinguish between the most fit and least fit with regards to the fitness tests. A model of the body mass index and the FSST predicted 25% of the variance in fitness level. Functional test means are reported by 10-year age groups and represent expected performance values.Health care professionals can use this information to compare their patients to this group of healthy individuals. This will allow them to have some idea of how well a person with an injury is performing relative to a healthy individual. Additionally the combination of a persons BMI plus their FSST gives the health care professional some information about an individual level of neuromuscular fitness so that the health care professional can guide their patients toward an appropriate level of physical activity after their injury or illness.

State estimation is widely used as a tool to evaluate the real time power system prevailing conditions. State estimation algorithms could suffer divergence under stressed system conditions. This dissertation first investigates impacts of variations of load levels and topology errors on the convergence property of the commonly used weighted least square (WLS) state estimator. The influence of topology errors on the condition number of the gain matrix in the state estimator is also analyzed. The minimum singular value of gain matrix is proposed to measure the distance between the operating point and state estimation divergence. To study the impact of the load increment on the convergence property of WLS state estimator, two types of load increment are utilized: one is the load increment of all load buses, and the other is a single load increment. In addition, phasor measurement unit (PMU) measurements are applied in state estimation to verify if they could solve the divergence problem and improve state estimation accuracy. The dissertation investigates the impacts of variations of line power flow increment and topology errors on convergence property of the WLS state estimator. A simple 3-bus system and the IEEE 118-bus system are used as the test cases to verify the common rule. Furthermore, the simulation results show that adding PMU measurements could generally improve the robustness of state estimation. Two new approaches for improving the robustness of the state estimation with PMU measurements are proposed. One is the equality-constrained state estimation with PMU measurements, and the other is Hachtel's matrix state estimation with PMU measurements approach. The dissertation also proposed a new heuristic approach for optimal placement of phasor measurement units (PMUs) in power system for improving state estimation accuracy. In the problem of adding PMU measurements into the estimator, two methods are investigated. Method I is to mix PMU measurements with conventional measurements in the estimator, and method II is to add PMU measurements through a post-processing step. These two methods can achieve very similar state estimation results, but method II is a more time-efficient approach which does not modify the existing state estimation software.

Mixture modeling has numerous applications. One particular interest is microarray data analysis. My dissertation research is focused on the Contaminated Chi-Square (CCS) Modeling and its application in microarray. A moment-based method and two likelihood-based methods including Modified Likelihood Ratio Test (MLRT) and Expectation-Maximization (EM) Test are developed for testing the omnibus null hypothesis of no contamination of a central chi-square distribution by a non-central Chi-Square distribution. When the omnibus null hypothesis is rejected, we further developed the moment-based test and the EM test for testing an extra component to the Contaminated Chi-Square (CCS+EC) Model. The moment-based approach is easy and there is no need for re-sampling or random field theory to obtain critical values. When the statistical models are complicated such as large mixtures of dimensional distributions, MLRT and EM test may have better power than moment based approaches, and the MLRT and EM tests developed herein enjoy an elegant asymptotic theory.

Constant False Alarm Rate (CFAR) Processors are important for applications where thousands of detection tests are made per second, such as in radar. This thesis introduces a new method for CFAR threshold estimation that is particularly applicable to sound source detection with distributed microphone systems. The novel CFAR Processor exploits the near symmetry about 0 for the acoustic pixel values created by steered-response coherent power in conjunction with a partial whitening preprocessor to estimate thresholds for positive values, which represent potential targets. To remove the low frequency components responsible for degrading CFAR performance, fixed and adaptive high-pass filters are applied. A relation is proposed and it tested the minimum high-pass cut-off frequency and the microphone geometry. Experimental results for linear, perimeter and planar arrays illustrate that for desired false alarm (FA) probabilities ranging from 10-1 and 10-6, a good CFAR performance can be achieved by modeling the coherent power with Chi-square and Weibull distributions and the ratio of desired over experimental FA probabilities can be limited within an order of magnitude.

Several studies have examined the effect of remittances on economic growth,poverty, education, and governance, among other factors, in developing countrieswith inconclusive results. Using annual panel data of 99 developing countries invarious empirical models, this study aim to answer the question how remittances affect a broader aspect of development using the Human Development Index asdependent variable. The findings indicate that there is a positive relationship between remittances and the level of human development in developing countries.