University of Windsor

About: University of Windsor is a education organization based out in Windsor, Ontario, Canada. It is known for research contribution in the topics: Population & Argumentation theory. The organization has 10654 authors who have published 22307 publications receiving 435906 citations. The organization is also known as: UWindsor & Assumption University of Windsor.

Single-molecule detection using surface-enhanced resonance Raman scattering and Langmuir-Blodgett monolayers

Abstract: The Langmuir-Blodgett (LB) technique has been used to obtain spatially resolved surface-enhanced resonance Raman scattering (SERRS) spectra of single dye molecules dispersed in the matrix of a fatty acid. The experimental results presented here mimic the original electrochemical surface-enhanced Raman scattering (SERS) work where the background bulk water did not interfere with the detection of the SERS signal of molecules adsorbed onto the rough silver electrode. LB monolayers of the dye in fatty acid have been fabricated on silver island films with a concentration, in average, of one probe molecule per micrometer square. The properties of single-molecule spectroscopy were investigated using micro-Raman including mapping and global images. Blinking of the SERRS signal was also observed.

Disabilities of Arithmetic and Mathematical Reasoning Perspectives From Neurology and Neuropsychology

Abstract: Current research on brain-behavior relationships in disabilities of arithmetic and mathematical reasoning is reviewed from both a neurological and a neuropsychological perspective. Although no entirely satisfactory statement of the relationship between arithmetic skills and brain functions has yet emerged, investigators in this area have provided evidence regarding the involvement of some brain systems in processes of calculation. Also, the developmental importance of right- versus left-hemisphere integrity for the mediation of arithmetic learning and performance has been suggested. We propose that an account of brain-behavior relationships in children intended to explain and predict developmental disabilities of arithmetic learning needs to address several important content and processing distinctions in order to (a) encompass empirically derived subtypes of children with learning disabilities who exhibit difficulties with arithmetic and (b) provide adequate direction for future subtyping and intervention research.

Qualitative Research With Small Connected Communities Generating New Knowledge While Upholding Research Ethics

Abstract: Qualitative researchers have a dual mission: to generate knowledge through rigorous research and to uphold ethical standards and principles. Qualitative researchers often conduct studies with small connected communities in which relationships exist among community members. When engaging such communities, researchers might face ethical issues in upholding confidentiality standards while they work to achieve their dual mandate. Qualitative scholars have paid little attention to the ethical challenges that might arise in this context. Drawing on our experiences conducting studies with such communities, we expand the dialogue concerning qualitative research ethics by making explicit conceptual and practical tensions that emerge at various stages of the research process; articulating our respective reflective processes; and exploring issues associated with strategies for upholding confidentiality. We conclude with lessons learned to guide researchers who might face similar challenges.

Electrocatalysis of Borohydride Oxidation on Colloidal Pt and Pt-Alloys (Pt-Ir, Pt-Ni, and Pt-Au) and Application for Direct Borohydride Fuel Cell Anodes

Abstract: Colloidal Pt and Pt-alloys (Pt-Au, Pt-Ni, and Pt-Ir, 1:1 atomic ratio) supported on Vulcan XC-72 (20% wt metal load) were prepared according to the Bonneman method and investigated for electrocatalytic activity with respect to borohydride oxidation for fuel cell applications. Voltammetry on static and rotating electrodes, chronopotentiometry, and chronoamperometry were performed on the colloidal catalysts immobilized on glassy carbon with the help of Nafion 117. The BH - 4 electro-oxidation mechanism is complex and it could involve, depending on the catalyst, a number of species such as BH - 4 directly, BH 3 OH - , and H 2 (the latter two species formed in catalytic hydrolysis). Direct borohydride fuel cell experiments using a 2 M NaOH-2 M NaBH 4 solution on the anode side, 5 mg cm - 2 colloidal anode catalyst load, Nafion 117 membrane, and an O 2 gas diffusion cathode with 4 mg cm - 2 Pt, showed that Pt-Ir and Pt-Ni were the most active anode catalysts, giving a cell voltage of 0.53 V at 100 mA cm - 2 and 333 K.