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UNB Scholar is an institutional repository initiative of UNB Libraries intended to collect, preserve, showcase, and promote the open access scholarly output of the UNB community. Use UNB Scholar to explore specific collections, or search all content in the repository. Material submitted to the repository will also be freely discoverable online through Google and other major search engines.

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Recent Submissions

Parental alienation: Intimate partner violence by proxy
(University of New Brunswick, 2023-12) Ashe, Carly; Gill, Carmen
This thesis examines interviews with nine women to explore how women experience and are impacted by parental alienation as a tactic of coercive control. Thematic analysis using NVIVO-14 software was used to identify recuring themes related to the three research questions that guide this study: how mother-child relationships are impacts by parental alienation; what resources mothers use in help-seeking; and do they experience barriers and obstacles to meaningful support in their help-seeking. Through understanding victims’ experiential perceptions of parental alienation, the key purpose of this study was aimed at better understanding how mothers victimized by parental alienation can be better supported in the future by legal professionals. Greater recognition of the pattern of coercive control, in which parental alienation occurs, was found to be needed by intervening professionals, along with further consideration towards preventative measures and more trauma-informed approaches.
Love at first flight: Mating errors, population genetics, and the slow spread of an invader
(University of New Brunswick, 2023-12) Anderson, Jennifer L; Heard, Stephen B.
This thesis investigates mating interactions and population genetics of the invasive Tetropium fuscum Fabricius (Coleoptera: Cerambycidae) and its native congener, Tetropium cinnamopterum Kirby (Coleoptera: Cerambycidae) in Nova Scotia, Canada, to help explain the slow spatial spread of T. fuscum in North America. Tetropium fuscum first appeared in North America in about 1990 and has since outcompeted the native T. cinnamopterum in the sympatric zone and spread approximately 150 km from its point of entry but has since halted its spread. Tetropium fuscum and T. cinnamopterum have common host plants, overlapping flight periods and share the same male-produced sex-aggregation pheromone, fuscumol, that attracts both sexes. These species would have ample opportunity to encounter each other in the field due to these similarities suggesting hybridization is a possibility. Our mating behaviour experiments showed males of both species make mating errors under no-choice mating conditions. Under choice mating conditions T. cinnamopterum males show a strong preference for same-species females but T. fuscum is less discriminating. We designed a species discriminating SNP assay with the goal of detecting hybridization to confirm that mating errors also take place in the field. We found low levels of introgression in the sympatric zone as well as the presence of cryptic individuals that morphologically present as T. cinnamopterum while genetically presenting as T. fuscum. We investigated the possibility that female body size rather than species influences mate choice in Tetropium. Tetropium cinnamopterum females are significantly larger than T. fuscum females although body size was not a determining factor in male mate choice for these species. Our findings suggest heterospecific matings between these species happen but may be rare and the resulting offspring may not be as fit as their parents, which could exacerbate Allee effects at the edge range of T. fuscum and reinforce its apparently pinned range border.
A Bloom filter based authentication scheme for vehicular digital twin
(University of New Brunswick, 2024-03) Adeyiga, Olajide; Lu, Rongxing
The rapid growth in the automobile industry and the competitive nature of industry players has necessitated a closer connection between vehicles and their owners. This work will explore indepth the use of a Bloom filter based mutual authentication scheme in a vehicular digital twin system. Currently research into digital twin of vehicles within the IoT space shows that vehicles require a constant means of communication with their digital twin while the digital twin also requires such means of communication with the IoVs and other Digital Twin systems. However, these systems exhibit significant security gaps. The system is currently prone to adversarial attacks like the replay, anonymity, linkability attacks among others. The goal of this research will be the implementation of an authentication scheme that provides secure connection between all entities within a vehicular digital twin network. This scheme will use user credentials and vehicle private features to achieve mutual authentication.
An efficient dynamic key management scheme for IoT devices
(University of New Brunswick, 2023-10) Vikraman Pillai, Vishnu Prasanth; Lu, Rongxing
The Internet of Things or IoT is a collective term for electronic devices with computing and connectivity. Our proposed dynamic key management scheme is designed for secure group communication of IoT devices. It offers efficient key distribution for a small to medium group of devices in domains such as centralized healthcare systems. Our key management scheme ensures forward secrecy, backward secrecy, and key independence in group communication. The scheme uses binary heap trees and bloom filters for efficient storage, organize and verification of secret keys. It uses polynomial coefficients secured with modular arithmetic to distribute the keys. The proposed implementation of the scheme uses lightweight mathematical operations such as XOR, multiplication, string concatenations, and hashing for devices having limited computing capabilities. The thesis is concluded with the performance analysis of the scheme that demonstrates the suitability of the scheme with similar IoT group communication schemes.
Efficient in-memory processing of SQL queries with JIT compilation
(University of New Brunswick, 2023-12) Verma, Saumya; Ray, Suprio
Database systems are vital to the modern world. The conventional approach to SQL query execution is to convert a SQL query into a plan tree of relational algebra operators and then interpret them over each tuple. This method has an advantage when the bottleneck is disk I/O. However, modern advances in hardware have led to faster storage systems and large main memory capacities. With in-memory query processing, the mentioned traditional approach based becomes a performance bottleneck by consuming a significant portion of query execution time. Therefore, the thesis introduces a compilation-based in-memory database system. It leverages the advantages of intermediate representation code generation for scan, filter, group-by, sort-by, aggregation, and join operations of SQL queries with Just-In-Time compilation using the Multi-level Intermediate Representation framework. Evaluation shows that compared with a conventional database system (PostgreSQL) and a high-level language (C++) code generating query processor, our proposed system performs significantly better.