Saint Mary's University Institutional Repository
http://library2.smu.ca:80
This digital repository system captures, stores, indexes, preserves, and distributes digital research material by or relating to Saint Mary's University, Halifax, NS, Canada.2017-09-18T15:59:50ZInvestigations on states of 20Mg and spallation reaction effects for constraining nuclear physics inputs for X-ray bursts
http://library2.smu.ca:80/handle/01/27086
Investigations on states of 20Mg and spallation reaction effects for constraining nuclear physics inputs for X-ray bursts
We present the first observation of a resonance state in the proton drip-line nucleus
20Mg. The resonance state was populated via inelastic scattering of 20Mg with a solid
deuteron target using the IRIS facility stationed at TRIUMF, Canada. Together with
the ground state and first excited state, a new resonance state is observed at excitation
energy of 3.68 0.04 MeV. Based on a comparison of the measured angular distributions to distorted wave Born approximation calculations, the first excited state is consistent with L=2 excitation confirming its spin to be 2+. Similar comparison for new resonance suggests a spin possibility of either (4+) or (2+). The new resonance state lies in the Gamow window and hence puts constraint on the 18Ne(2p;
)20Mg reaction rate, a possible breakout reaction from hot CNO cycles in X-ray bursts. The new resonance state is higher in energy than expectations based on mirror symmetry to 20O. The inferred reaction rate of 19Na(p,)20Mg is lower than the previous predictions. The net rate of the 18Ne(2p;)20Mg is found to be competitive to beta decay of 18Ne only at high densities for it to be a viable breakout path. A comparison to theoretical predictions show that the calculations based on chiral interactions and NN+3N forces fails to explain the observed resonance state. The new data will therefore serve as guidance to benchmark the nuclear structure models and interactions at the drip-line.
In a related study of CNO cycles in X-ray bursts, the spallation of the accreted material
in the atmosphere of a neutron star has been modelled considering a full cascading
destruction process. The results show that the replenishment of CNO elements in a cascading process is minuscule and the CNO abundances are reduced to negligible values. The impact of reduced CNO metallicity on X-ray burst ignition conditions are discussed.
2017-07-21T00:00:00ZInvestigation of efficient methods for the determination of strassen-type algorithms for fast matrix multiplication
http://library2.smu.ca:80/handle/01/27085
Investigation of efficient methods for the determination of strassen-type algorithms for fast matrix multiplication
Fast matrix multiplication algorithms such as the Strassen algorithm allow for
the multiplication of matrices with fewer multiplications than would normally be
needed, thus making the calculations more efficient. We introduce an efficient
and highly parallelizable method for searching for Strassen-type fast matrix
multiplication algorithms for multiplying two 2 x 2 matrices, and discuss its
application in searching for algorithms that perform fast matrix multiplies for the
3 x 3 case. Searching for these algorithms is difficult, because the search space of
possible algorithms is extremely large. The method introduced in this thesis, for
the 2 x 2 case, makes use of a grid representation for the matrix multiplication
algorithms, making it easier to view patterns in the algorithms and prune the
search space effectively. The method is implemented in the Scilab language and is
able to find all Strassen-type fast matrix multiplication algorithms in about 90
minutes of computing time on an Intel Core i7 6700k CPU. Based on the insight
we gain from the 2 x 2 case, we provide suggestions for an efficient search
method for the 3 x 3 case.
2016-04-25T00:00:00ZThe stories of South Korean religious lesbians: The voices of the women struggling with ceaseless conflicts
http://library2.smu.ca:80/handle/01/27084
The stories of South Korean religious lesbians: The voices of the women struggling with ceaseless conflicts
I explore how Korean religions affect South Korean lesbians’ identities and lives by capturing the perspectives of Korean lesbians who are Presbyterian, Catholic and Buddhist through this study. This study aims to raise awareness of conflicts caused by the religions through testimonies provided in the lesbians’ own voices and to find ways to unravel the conflicts and improve relationships at the intersection of lesbian identity, religion, family, and members of South Korean society. Therefore, this research centers on the first-person accounts and stories of religious Korean lesbians. Six South Korean religious lesbians were interviewed, and the women’s stories were reconstructed as autobiographic narratives based on feminist standpoint theory to consider the importance of understanding each woman’s self-perception as a religious lesbian in South Korea.
2017-06-07T00:00:00ZL'apprivoisement du Rhinoceros : la metamorphose et la mentalite collective
http://library2.smu.ca:80/handle/01/27083
L'apprivoisement du Rhinoceros : la metamorphose et la mentalite collective
In this study we will analyse the play Rhinoceros (1959) by Eugene Ionesco. Through absurd theatre, Ionesco is able to bring to life his anxieties and incertitudes about the human condition. Rhinoceros was written during the Second World War, therefore, many of the metaphors reference back to the collective consciousness imposed by the Nazi Party worldwide. Ionesco uses metamorphism to represent those that are not able how to think for themselves or think of others. The metamorphosis from human to rhinoceros symbolise those in society that have become blind to the ideologies of the Nazi Party. With the use of his contemporary ideas, Ionesco is considered one of the most influential artistes of the absurd genre by promoting.free thinking. The major problems that Ionesco discusses - such as the equality of knowledge and free forward thinking - will conclude the analysis by explaining why it is importance to study the past today.
1 online resource (22 p.); Includes abstract in French and English.; Includes bibliographical references (p. 22).
2017-01-01T00:00:00ZT#
http://library2.smu.ca:80/handle/01/27082
T#
2017-10-15T00:00:00ZSummary of Sources for Digby and Yarmouth Cricketers - Tables
http://library2.smu.ca:80/handle/01/27081
Summary of Sources for Digby and Yarmouth Cricketers - Tables
Caption title: The cricketers of Digby and Yarmouth counties, Nova Scotia, 1871-1914: social roots of a village and small-town sport. Consists of data tables for cricketer's places of birth, parental places of birth, ethnic origins, and religious affiliations for Digby and Yarmouth counties.
2017-01-01T00:00:00ZSummary of Sources for Digby and Yarmouth Cricketers - Identified Players
http://library2.smu.ca:80/handle/01/27080
Summary of Sources for Digby and Yarmouth Cricketers - Identified Players
Caption title: The cricketers of Digby and Yarmouth Counties, Nova Scotia, 1871-1914: social roots of a village and small-town sport. Consists of lists of players (male and female), for the towns of Digby, Weymouth, Hebron, Ohio, Tusket, and Yarmouth. Data include names of players, date and place of birth, parental place of birth, occupation of player, father's occupation, self-identified ethnic origin, and religious affiliation.
2017-01-01T00:00:00ZT2
http://library2.smu.ca:80/handle/01/27078
T2
2017-09-14T00:00:00ZWorkplace aggression and the moderating effects of violence prevention climate
http://library2.smu.ca:80/handle/01/27077
Workplace aggression and the moderating effects of violence prevention climate
The purpose of this study was to both examine the dimensionality of several
constructs of workplace aggression, and to determine whether violence prevention
climate perceptions could moderate potential negative ramifications within a well established
occupational stress framework. A Qualtrics panel of 315 employees from a
diverse range of occupation answered a series of online questionnaires pertaining to their
occupational risk and exposure to violence and aggression, psychological well-being, and
fear of future violence. Results from confirmatory factor analyses indicated a six-factor
structure such that all constructs of workplace aggression were empirically distinct from
one another. Moderation analyses themselves revealed unique patterns of moderations
based on the various dimensions of violence prevention climate. Implications concerning
both the unique factor structure and moderation results are discussed.
2017-04-01T00:00:00ZFinite difference based error estimation for boundary value ODEs, 1D PDEs and 2D PDEs
http://library2.smu.ca:80/handle/01/27076
Finite difference based error estimation for boundary value ODEs, 1D PDEs and 2D PDEs
Differential equations are involved in many felds. Often these cannot be solved exactly, so they must be approximated. To do this, we derive a fourth order finite difference scheme for non-uniform meshes. This is paired with a second order finite difference scheme for non-uniform meshes to generate an error estimate for the second order finite difference scheme. The difference between the solutions obtained from the two schemes is used to generate an error estimate for the second order finite difference scheme. The schemes are tested in three cases for order of convergence and quality of error estimate. The first test case is boundary value ordinary differential equations, the second test case is 1D partial differential equations, and the third case is 2D partial differential equations. There were two methods to define boundary conditions in the 2D partial differential equation, either in Dirichlet or Neumann form. We found that both finite difference schemes had an experimental order of convergence consistent with the expected theoretical order of convergence in the boundary value ordinary differential equation and 1D partial differential equation (PDE) cases. This was also demonstrated in the 2D PDE case when using boundary conditions in Neumann form. Only the fourth order scheme showed experimentally and theoretically consistent convergence rates on 2D PDEs when using Dirichlet boundary conditions. The error estimate was within one order of magnitude of the true error for the second order finite difference scheme in all cases where the subintervals in the meshes were small enough to allow the Taylor's series, upon which the finite difference schemes are based, to hold. We conclude that the schemes can be used within a computational algorithm incorporating adaptive meshing and error control features.
1 online resource (77 p.) : col. ill.; Includes abstract and appendix.; Includes bibliographical references (p. 45-46).
2017-01-01T00:00:00Z