As the world swims deeper into a deluge of data, binary datasets relating objects to properties can be found in many different fields. Such datasets abound in practically any area of interest, including biology, politics, entertainment, and education. This explosion calls for the definition of new types of patterns in binary data, as well as algorithms to find efficiently find these patterns. In this work, we introduce truth tables as a new class of patterns to be mined in binary datasets. Truth tables represent a subset of properties which exhibit maximal variability (and hence, suggest independence) in occurrence patterns over the underlying objects. Unlike other measures of independence, truth tables possess anti-monotone features that can be exploited in order to mine them effectively. We present a level-wise algorithm that takes advantage of these features, showing results on real and synthetic data. These results demonstrate the scalability of our algorithm. We also introduce new methods of mining straddling biclusters. Biclusters relate subsets of objects to subsets of properties they share within a single dataset. Straddling biclusters extend biclusters by relating a subset of objects to subsets of properties they share in two datasets. We present two levelwise algorithms, named UnionMiner and TwoMiner, which discover straddling biclusters efficiently by treating multiple datasets as a single dataset. We show results on real and synthetic data, and explore the advantages and limitations of each algorithm. We develop guidelines which suggest which of these algorithms is likely to perform better based on features of the datasets. / Master of Science

The basic aim of this mini-dissertation is to apply the Levi-Straussian theory to the Setswana short story: 0 nkutlwe by R.M. Malope in order to determine the dynamism of binary oppositions in the structure of the story and relate these to the context of the Batswana community. The study is divided into four chapters. The objectives as well as the central problem are outlined and motivated in the first chapter. The second chapter deals with the theoretical concepts. An explanation of binary oppositions and a discussion of the Levi-Straussian theory with reference to the Tsimshian myth, The story of Asdiwal are provided. The third chapter concentrates on the structural analysis of 0 nkutlwe in the context of the Batswana community. The binary oppositions are identified in the essential aspects of the structure of the story on various levels (the geographic, economic, sociological and cosmological) according to LeviStrauss's theory. The theme of contrast between modern life and traditional life should not be misunderstood as an attack on modem life as such, but as an appeal to the Batswana community not to disregard their tradition. Chapter four is a summary of the main points of this study and conclusion. In 2:eneral it can be concluded that Levi-Strauss theory can be successfully applied to a reading of modem literature. / Thesis (MA (Tswana))--PU for CHE, 1998

The basic aim of this mini-dissertation is to apply the Levi-Straussian theory to the Setswana short story: 0 nkutlwe by R.M. Malope in order to determine the dynamism of binary oppositions in the structure of the story and relate these to the context of the Batswana community. The study is divided into four chapters. The objectives as well as the central problem are outlined and motivated in the first chapter. The second chapter deals with the theoretical concepts. An explanation of binary oppositions and a discussion of the Levi-Straussian theory with reference to the Tsimshian myth, The story of Asdiwal are provided. The third chapter concentrates on the structural analysis of 0 nkutlwe in the context of the Batswana community. The binary oppositions are identified in the essential aspects of the structure of the story on various levels (the geographic, economic, sociological and cosmological) according to LeviStrauss's theory. The theme of contrast between modern life and traditional life should not be misunderstood as an attack on modem life as such, but as an appeal to the Batswana community not to disregard their tradition. Chapter four is a summary of the main points of this study and conclusion. In 2:eneral it can be concluded that Levi-Strauss theory can be successfully applied to a reading of modem literature. / Thesis (MA (Tswana))--PU for CHE, 1998

For decades gender scholars have recognized the importance of gender to subjectivity, lived experiences, and life chances. Nonbinary gender identities are becoming more recognized by social, legal, and government institutions. However, currently there is a lack of research and scholarship that focuses on nonbinary gender identities. I demonstrate that the sociology of gender must move beyond the constraints of the hegemonic gender binary system in order to have a full and holistic conceptualization of gender. This paper reviews and critically analyzes contemporary interdisciplinary scholarship on nonbinary gender identities, then sets out a research agenda for moving forward. Within this scholarship there are gaps, shortcomings and limitations that arise that include upholding the cis/trans binary, misrepresenting contemporary society as having reached an era of understanding gender complexities, problematic framings of cross-cultural and historical examples, and centering discrimination/violence. I propose a research agenda moving forward should center racialization due to (un)marked whiteness in scholarship, legibility/intelligibility, and the possibilities and knowledge that exist due to existing in a space of exclusion.

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Since generalized linear model (GLM) with binary response variable is widely used in many disciplines, many efforts have been made to construct a fit model. However, little attention is paid to the link functions, which play a critical role in GLM model. In this article, we compared three link functions and evaluated different model selection methods based on these three link functions. Also, we provided some suggestions on how to choose the proper link function for binary data. / text

High resolution observations have been made of a number of southern Cepheids to make an observational and theoretical study of Cepheid variables using radial velocities. The stars studied were part of a long term programme to observe southern variable stars, from which a valuable database of radial velocities gathered over a long period were available. Sixteen échelle spectrograph orders in the wavelength region 5400 - 8600Å were used, which included a number of absorption lines covering a range of species and excitation potentials. The line bisector technique was used to measure stellar and telluric lines and to obtain radial velocities. To improve the precision of the radial velocities we used telluric lines to calibrate the observations to a common reference frame. The radial velocities have a precision of ~300ms⁻¹ allowing the detection of velocity differences of ~1 kms⁻¹ with confidence. The radial velocity data obtained at Mount John University Observatory (MJUO) was combined with data from various sources to determine the orbits of any Cepheids exhibiting orbital motion. The various orbital parameters were determined for a number of systems and where radial velocities for the companions exist, some estimate of the mass was made. The precision of the radial velocities obtained from MJUO also allowed us to search for line level effects for a number of species among the Cepheid spectra. A number of IAU standard stars were observed to calibrate the radial velocities obtained at MJUO to the IAU standard scale. The radial velocities from MJUO were found not to differ significantly from the IAU values. Binary Cepheids are particularly useful in the determination of Cepheid masses, which are still an active topic for astronomical research. The value of the MJUO data was that it provided a consistent set of data against which other sources of data could be compared. For 8 of the Cepheids new or improved orbital solutions were found. They are Y Car, YZ Car, AX Cir, BP Cir, S Mus, V636 Sco, V350 Sgr, W Sgr and T Mon. Of these 8 systems, 3 had radial velocities for their respective companions which allowed the determination of the mass of the Cepheids. Masses were determined for the 9 day Cepheid S Mus (6.0±0.4M⊙), the double mode Cepheid Y Car (4.5±1.8 M⊙) and the 5 day Cepheid V350 Sgr (6.0±0.9 M⊙). New results presented here include the first orbital solution for the binary Cepheid AX Cir, a completely revised orbital solution for the binary Cepheid YZ Car which established its eccentricity, and orbital motion. The binary Cepheid BP Cir however was found to require a new pulsation period of 2.39819d to fit the observed pulsational velocities. Observations of the suspected binary Y Oph show it to be an unusual Cepheid with no evidence of binarity (~0.5 kms⁻¹) in our data. Finally, the 5 day Cepheid W Sgr was observed to have the lowest orbital amplitude measured. We discussed the line level effects found in our observations, where a number of spectral lines were observed to show departures from the Fei velocity curve. Line level effects were observed in H⍺, CaⅡ, BaⅡ, FeⅡ, SiⅠ and SiⅡ. Most of the Cepheids were observed to show the same progression of line level effects, with the best example being the bright Cepheid β Dor. The SiⅡ velocities indicate that these lines have the lowest velocity amplitude and form deeper in the atmosphere than the FeⅠ, where as the CaⅡ and H⍺ lines were all observed to have much greater velocity amplitudes with the peak of these velocity curves occurring later, in pulsational phase. These observations are consistent with the lines forming at different depths as a density wave propagates through the atmosphere. X Sgr is peculiar due to its interesting spectra which at certain phases show line doubling and at most other phases the lines were asymmetric. These observations are interpreted to support the idea that X Sgr has strong shock waves present and that X Sgr has greater atmospheric transparency in the spectral region near 6000Å. We also present the results of dynamical modelling of a pulsating Cepheid. Using a non-linear radiative hydrodynamic code developed by A. Fokin, we have modelled two Cepheids, AX Cir and YZ Car. These models have then been compared with the observations obtained here. After extensive modelling using the latest OP opacities, it has been determined that the Cepheid AX Cir can be modelled using parameters L = 2050 L⊙, M = 4.8 M⊙ and Teff = 5900K. The model reproduced the observed stellar characteristics, such as the photometric amplitude and pulsational period. Comparison between the observations and the model for the selected spectral lines, FeⅠ 5576Å, SiⅡ 6347Å, BaⅡ 5853Å and CaⅡ 8542Å show good agreement with similar amplitudes and velocity curves. With no strong shock waves being produced by the model, the observed line level effects can be explained by a density wave. The 18 day Cepheid YZ Car was chosen to explore the capabilities of the radiative hydrodynamic code for a long period Cepheid. The best model developed that reproduced the observed stellar characteristics had parameters L = 9350 L⊙, M = 7.7 M⊙ and Teff = 5590K. The period was 18.314 days and the bolometric light curve agreed well with the observed visual light curve. Comparison of the theoretical and observed radial velocities showed good agreement.

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