Scholarship @ UWindsor

Scholarship @ UWindsor is the institutional repository of the University of Windsor (UWindsor), showcasing and preserving the UWindsor community’s scholarly outputs, as well as items from the Leddy Library’s Archives & Special Collections. Its mission is to disseminate and preserve knowledge created or housed at the University of Windsor.

Contact scholarship@uwindsor.ca for more information.

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Recent Submissions

Access status: Open Access ,
Effect of curing conditions on the compressive strength of sodium carbonate activated slag–glass powder mortar
(NRC Research Press, 2020-09-03) Adeyemi Adesina; Jonathan Cercel; Sreekanta Das
This study presents the experimental investigation of the effect of curing conditions on the properties of mortar mixtures made with sodium carbonate activated slag–glass powder as a binder. Slag and glass powder were used at an equal percentage as the aluminosilicate precursor and the binary blend was activated with sodium carbonate. The corresponding compressive strength and ultrasonic pulse velocity of the mixtures cured in different conditions were investigated. The curing conditions used in this study are dry, moist, and submerged curing. Microstructural investigations were also carried out to understand the microstructural properties of the mixtures exposed to these curing conditions. Results from this study showed that moist curing is the most effective curing method for mortar made with sodium carbonate alkali-activated slag–glass powder as a binder. Microstructural evaluations further confirm the strength results as mortar samples cured in a moist condition exhibited a denser microstructure.
Access status: Open Access ,
Collective Behavior in Wild Zebrafish
(Mary Ann Liebert, Inc., 2020-06-09) Delia S. Shelton; Sierra G. Shelton; Danita K. Daniel; Manickam Raja; Anuradha Bhat; Robyn L. Tanguay; Dennis M. Higgs; Emı́lia P. Martins
Anthropogenic change is expected to alter environments at alarming rates. To predict the impact of modified environments on social behavior, we must study the relationship between environmental features and collective behavior in a genetically tractable model, zebrafish ( Danio rerio ). Here, we conducted a field study to examine the relationship between salient environmental features and collective behavior in four populations of zebrafish. We found zebrafish in flowing water formed volatile groups, whereas those in still water had more consistent membership and leadership. Groups in fast-flowing water were large (up to 2000 fish) and tightly knit with short nearest neighbor distances, whereas group sizes were smaller (11 fish/group) with more space between individual fish in still and slow-flowing water. These observations point to a possible profound role of water flow in influencing collective behavior in wild zebrafish.
Access status: Open Access ,
Modeling commercial vehicle trip generation at the business-establishment level
(NRC Research Press, 2020-05-02) Georgiana Madar; Hanna Maoh; Kevin Gingerich
The planning and design of efficient transportation systems require an in-depth understanding of the micro-behaviour governing vehicle movements. Recent efforts to analyze commercial vehicle movements have begun focusing on the collection and usage of detailed microdata sets. This paper contributes to these efforts by devising statistical models for predicting the number of outbound commercial vehicle trips at the firm level given a sample of establishments in the Windsor, Ontario region. A comparison was made between a model that can be created using microdata obtained through an establishment survey, a model that utilized commercial firm lists with basic firm attributes that include employment size and industry classification, and a modified model with the basic variables and limited detailed microdata. The results suggest that commercial firm datasets can be used to generate reasonable predictions. However, additional information about employment, industry, vehicle ownership and other firm characteristics certainly enhance the models’ predictive ability.
Access status: Open Access ,
Multiamorphous Phases in Diketopyrrolopyrrole-Based Conjugated Polymers: From Bulk to Ultrathin Films
(American Chemical Society, 2020-05-26) Shaochuan Luo; Tianyi Wang; Michael U. Ocheje; Song Zhang; Jie Xu; Zhiyuan Qian; Xiaodan Gu; Gi Xue; Simon Rondeau‐Gagné; Jing Jiang; Wenbing Hu; Evgeny Zhuravlev; Dongshan Zhou
The glass transition temperature (Tg) of conjugated polymers is a crucial physical parameter that governs their mechanical and electrical properties for applications from sensor technology to skin-like electronics. Despite some well-developed methods that exist for detecting Tg of conjugated polymers, there is still a need for the combination of advanced calorimetric methodologies to characterize Tg in a broad range of temperatures and scales from bulk to nanometer-thin films. In this work, alternating current (ac) chip calorimetry and flash differential scanning calorimetry (flash DSC) are applied to successfully identify the Tgs and segmental relaxations of conjugated polymers. The detected relaxations were interpreted, in agreement with existing observations in similar systems, as a side-chain relaxation (low temperature), mobile amorphous fractions (MAF), and rigid amorphous fractions (RAF). Tgs of MAF and RAF increase and decrease with increasing size of fused thiophene units in the backbone, respectively. The Tgs of diketopyrrolopyrrole-based conjugated polymer thin films are also identified by the same method, with both Tgs showing a decreased value compared to those of bulk samples. Furthermore, the weight fractions of MAF and RAF with various film thicknesses are qualitatively analyzed based on the heat capacity step of each amorphous fraction during the glass transition. This facile method gives insights into the physical nature of amorphous phases in conjugated polymers for better revealing their structure–property relationships, which will guide the designs of new materials with optimized electrical and mechanical properties in the future.
Access status: Open Access ,
The antioxidant vitamin E as a membrane raft modulator: Tocopherols do not abolish lipid domains
(Elsevier BV, 2020-01-15) Mitchell DiPasquale; Michael H. L. Nguyen; Brett W. Rickeard; Nicole Cesca; Christopher Tannous; Stuart R. Castillo; John Katsaras; Elizabeth G. Kelley; Frederick A. Heberle; Drew Marquardt