1,720,983 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Understanding charging patterns of electric vehicles (EVs) in Calgary and its implications for future electricity demand and response.
No full textFeasibility Study of Smart Charging in Electric Vehicles
No full textElectric vehicles (EVs) are a rapidly emerging technology than can provide the opportunity to reduce emissions from the transportation sector. As EVs penetrate the transport market, electricity will become the fuel of the future and present new challenges and opportunities to Canadian utilities. This study aims to investigate the role of smart charging to address the challenges caused by EV adoption. Specifically, it seeks to examine the energy implications caused by EV charging and provide potential smart charging solutions along with policy recommendations. Most of the identified challenges are related to distribution grid, charging infrastructure and peak demand issue. Results suggest that workplace charging, time-of-use rates, and shifting load behaviour can effectively minimize the energy costs and avoid peak loads. These identified smart charging solutions can ultimately save millions of dollars to the utilities and set an example for managing energy efficiently even during the times of increased power demand
Electric vehicle incentives: Reconciling private and social costs and benefits
No full textCanada is looking to reduce its emissions by targeting the transportation sector. While there are a number of policies to reflect this, one in particular seeks to impact individual’s private decision to transition their passenger vehicles from internal combustion engine vehicles to the more environmentally beneficial battery electric vehicles. Results indicate that the current federal grant incentive program for electric vehicles plays a significant effect in the costs of investing in passenger BEVs and ICEVs. These costs are evaluated through net present value equations that reflect private costs, as well as incorporate the social cost of carbon. Furthermore, an inventory of the current policies in comparison to other countries provide further indication of where Canada needs to pivot in terms of policy to reach their current targets
Mandatory Radon Testing and Mitigation of Businesses in Alberta
No full textThis paper investigates the need for mandatory radon testing and mitigation measures in workplaces in Alberta. Radon, an odourless and colourless radioactive gas arising naturally from soil, has been linked to lung cancer. Despite alarming statistics, most businesses in Alberta are not required to conduct radon testing. The paper conducts a cost-benefit analysis within a 25-year timeframe to evaluate the implementation of mandatory radon testing and mitigation measures in workplace settings in Alberta.
The paper highlights that the lack of mandatory radon testing in businesses poses a significant and avoidable health risk. By focusing on occupational radon exposure and drawing on the precedent set by mandatory testing in childcare facilities, the paper proposes a feasible solution to mitigate radon-induced health hazards in workplaces.
The paper analyzes two alternatives: the status quo, where testing is voluntary, and mandatory testing for all registered businesses. It examines costs and benefits, including healthcare expenses and the value of statistical life. The analysis concludes that the mandatory testing scenario demonstrates cost reductions under both three percent and eight percent discount rates. The adoption of this approach could yield significant savings, estimated at eight to seventeen billion dollars over the next twenty-five years. The paper acknowledges assumptions and limitations but ultimately recommends that the government enforce mandatory radon testing and mitigation, safeguarding public health and ameliorating financial implications for Alberta
Developing a Statistical Risk Assessment and Grid Prediction Tool for Power System Reliability
No full textModern electricity grids face mounting reliability pressures as renewable generation expands, demand patterns shift, and extreme weather intensifies. This project developed a Grid Risk Assessment Tool to identify early warning signs of instability using historical datasets from ISOs and RTOs (AESO, ERCOT, and CAISO). A structured MySQL database consolidated system frequency, pricing, generation mix, intertie flows, and operator-declared events, from which predictive features such as ramp rates, reserve adequacy, renewable penetration, and frequency deviations were engineered. Logistic Regression, Random Forest, and XGBoost models were tested and evaluated using ROC-AUC, precision, and recall. Random Forest achieved both the strongest contextual performance and the best real-time performance. Feature analysis highlighted system electricity prices, renewable share, intertie support, and ramping activity as key drivers of instability. The findings demonstrate that predictive modeling can provide actionable early warning signals, supporting operators and policymakers in strengthening grid resilience and planning
The Potential for Hydrogen in Alberta: A Case Study of Combusting Hydrogen Gas in the Electricity Sector
No full textElectricity forms Alberta’s backbone, enabling progress, development, and an environment where businesses can thrive. Unlike other provinces with significant hydro resources, Alberta’s electricity industry is dominated by fossil fuels. One option to achieve lower carbon emissions is to replace natural gas with hydrogen as it does not emit any carbon dioxide when combusted. Moving to such a fuel will require technical compatibility, cost competitiveness, and the right incentive structure to encourage its use in the sector. Within this case study, I examine the current methods for producing hydrogen, discuss infrastructure compatibility, and then consider the current composition of Alberta’s large-scale electricity generators classified by make and model. For the most prevalent generators, I conducted a review of the potential technical capability in converting their fuel stocks to incorporate hydrogen as declared by the manufacturers and through similar conversion projects around the world. Furthermore, I analyze the marginal cost for the above generators to identify whether hydrogen is economic at current prices to incorporate into generator fuel mixtures. With current production methods and cost functions, hydrogen remains cost-prohibitive compared to its alternative of natural gas, whether for combustion turbines or steam boilers. Producing hydrogen from steam methane reforming would increase marginal fuel costs by 1.7 times compared to natural gas, and 1.36 times compared to coal. To successfully incentivize hydrogen, the carbon levy in Alberta would need to exceed $130 for production and carbon capture to become cost-effective given the natural gas prices over the last 10 years. If using steam methane reforming, carbon capture would be a required part of the hydrogen production process, else using hydrogen would be a more carbon-intensive option than using natural gas. Alternatively, as worldwide hydrogen production increases the sector may benefit from economies of scale from new technologies or methods making hydrogen a competitive option. This paper provides a study of the potential for hydrogen to power the electricity industry and further discusses some of the present and potential hurdles for policymakers to consider for hydrogen to become a successful fuel to power the sector
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