YorkSpace

YorkSpace is York University's Institutional Repository. It supports York University's Senate Policy on Open Access by providing York community members with a place to preserve their research online in an institutional context.

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Recent Submissions

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    Modified Viologen- and Methylpyridine-based Electrodes for Organic Batteries
    (Amercian Chemical Society, 2024-09-18) He, Xiaoming; Chen, Ling; Baumgartner, Thomas
    Efficient electrochemical energy storage has been identified as one of the most pressing needs for a sustainable-energy economy. Inorganic battery materials have traditionally been the center of attention, with the current state-of-the-art device being the lithium-ion battery. Recent pursuits have led to organic materials for their beneficial chemistry and properties, but suitable materials for organic batteries are still few and far between. This Spotlight on Applications highlights two intriguing pyridinium-based organic materials – modified viologens and carbonylpyridiniums that have both been successfully employed in electrode materials for solid-state Li-ion type organic batteries (LOBs). We will first provide an overview of the inherent electronic properties of each building block and how they can effectively be modified while maintaining or enhancing their desirable electrochemical properties for practical applications. We then describe a range of different material designs for a battery context and their application in various organic device settings with some examples showing competitive performance with traditional Li-ion batteries.
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    Afghanistan Shows the U.S. Folly of Trying to Implant Democratic Institutions in Abroad.
    (Academic Journalism Society, 2021-09-29) Karimi, Sirvan
    The rapid conquest of Kabul in Afghanistan and the triumphant seizure of power by the Taliban triggered shock waves throughout the world.
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    The Appeals and the Limits of Digital Education in the Post-Covid Era
    (2021-06-28) Karimi, Sirvan
    Though shifting to online teaching and learning has been a persistent trend for the last two decades, remotely delivered teaching has become a pervasive and ubiquitous worldwide phenomenon during the COVID-19 pandemic. There is no misgiving that the staggering impact of COVID-19 on education sector will cement e-learning as an indispensable ingredient of the traditional teaching and learning system. The intensification of the shift to digital teaching and learning is alleged to have the potential to reduce educational costs, diminish bargaining leverage of faculty and teachers’ unions in the education sector, and enhance learning capacity of students. Contrary to the views of ardent exponents of online teaching and learning, it can be demonstrated that e-learning neither reduces educational costs nor can it undermine the bargaining leverage of faculty and teachers’ unions.
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    Comparing the Politicization of COVID-19 and the Great Depression
    (2020-06-28) Karimi, Sirvan
    The COVID-19 pandemic has set in motion a seismic wave of consternation, anxiety, and trepidation. The crisis has provided a fertile ground for the proliferation of books, articles, and case studies across different academic disciplines. While most attention has concentrated on the analysis of the economic, social and psychological impacts of the pandemic, less attention has been paid to the emergence of an environment within which responses to the crisis are politicized by governments, political parties and politicians in order to enhance their electability. Furthermore, the politicization of the response to COVID-19 is to a great extent shaped by political expediency, not ideological orientation. Some have already attempted to compare the COVID-19 crisis and the Great Depression of the 1930s (see Fishback 2020; Gumede 2020; and Smith, 2020). Though the forces behind the economic crash of the 1930s and the recent economic shutdowns emanated from different sources, the politicization of responses to both crises emerges as a common trend.
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    Canada could benefit from Trump challenges
    (Institute for Research on Public Policy, 2017-07-17) Karimi, Sirvan
    Canada has an opportunity to bring in, through immigration, the best and brightest students and academics who are alienated by Trump’s policies.