Search Results (126)

The growing reliance on solar energy necessitates robust and interpretable forecasting models for stable grid management. Current research frequently employs Explainable AI (XAI) to glean insights from complex black-box models, yet the reliability and consistency of these explanations remain largely unvalidated. Inconsistent feature attributions can mislead grid operators by incorrectly identifying the dominant drivers of solar generation, thereby affecting operational planning, reserve allocation, and trust in AI-assisted decision-making. This study addresses this critical gap by conducting a systematic statistical evaluation of feature rankings generated by multiple XAI methods, including model-agnostic (SHAP, PDP, PFI, ALE) and model-specific (Split- and Gain-based) techniques, within a time-series regression context. Using a LightGBM model for one-day-ahead solar power forecasting across four sites in Calgary, Canada, we evaluate consensus and divergence using the Friedman test, Kendall’s W, and Spearman’s rank correlation. To ensure the generalizability of our findings, we further validate the results using a CatBoost model. Our results show a strong overall agreement across methods (Kendall’s W: 0.90–0.94), with no statistically significant difference in ranking (p > 0.05). However, pairwise analysis reveals that the “Split” method frequently diverges from other techniques, exhibiting lower correlation scores. These findings suggest that while XAI consensus is high, relying on a single method—particularly the split count—poses risks. We recommend employing multi-method XAI and using agreement as an explicit diagnostic to ensure transparent and reliable solar energy predictions. Full article

Background: Black and racialized immigrants with disabilities in Canada face overlapping systems of exclusion rooted in racism, ableism, and migration status. Yet, their experiences within health and rehabilitation services during the COVID-19 pandemic remain largely undocumented. This study explores how structural inequities shaped access to healthcare, rehabilitation, information, and community supports in the Greater Toronto and Hamilton Area (GTHA). Methods: Using narrative inquiry, ten in-depth interviews were conducted with participants who identified as Black or racialized, disabled, and having immigrated to Canada within the last 10 years. Narratives were analyzed through reflexive thematic analysis to identify how systems, relationships, and policies interacted to shape daily life, health and rehabilitation navigation during the pandemic. Results: Participants described systemic barriers in health and rehabilitation systems, experiences of “othering” and conditional belonging, and the critical role of informal and faith-based networks in navigating inaccessible services. Pandemic policies often intensified existing inequities. Conclusions: Findings underscore the need for intersectional health and rehabilitation planning that centers the voices of Black and racialized disabled immigrants. Addressing systemic racism and ableism is essential for equitable preparedness in future public health emergencies. Full article

This study examines the mobilization of social and cultural capital among first and second-generation Afro-Caribbeans in Canada, focusing specifically on Jamaican and Haitian populations. Employing an analytical model grounded in resistance and identity multi-positionality, this research utilizes Yosso’s theory of cultural wealth as a theoretical framework. Qualitative data were collected through focus groups and an intake survey aimed at exploring the dual objectives of defining Blackness and constructing an in-group Black identity alongside the establishment and contestation of social capital within these groups. The findings reveal a dynamic interplay between resistance and identity, highlighting how marginalized groups leverage their resilience to build robust social networks that challenge hegemonic norms. Significant generational differences were identified in experiences of racism, discrimination, and cultural preservation among the participants. This study contributes to the broader discourse on immigrant integration, social cohesion, and the role of cultural capital in mitigating systemic inequalities. The results underscore the necessity for intersectional approaches to comprehend the complexities of identity formation and social integration in multicultural societies. Moreover, the research emphasizes the critical importance of cultural heritage, identity, and community support as sources of strength and resilience for Afro-Caribbean communities in Canada. Full article

Background: This study’s objective was to be the first to explore the ethnicity/cultural origins, gender identity, ability/disability, sexual orientation, socioeconomic background, and harassment/discrimination experiences of Canadian radiation oncologists (ROs). Methods: Following a literature review and input from content experts, an ethics-approved national cross-sectional electronic survey was developed in English and French and electronically distributed to all ROs in Canada (n = 598). Descriptive statistics summarized responses. Comparisons between groups were performed using Chi-square tests, and content analysis was performed on open-ended responses. Results: The survey was completed in full by 42.5% of ROs (254/598). Most respondents were male (62.9%), 35–44 years old (39.2%), and heterosexual (94.3%). 41.2% identified as belonging to a racialized group, which is higher than the overall Canadian population (27%), but Black, Indigenous, and Southeast Asian ROs were underrepresented (1.9% vs. 4%, <1% vs. 5% and 1.6% compared to 4%, respectively). A significant subset analysis showed that only 20% (21/105) of racialized ROs were women, whereas Caucasian women comprised 49.3% (74/150) of Caucasian respondents (p < 0.001). While 75.4% of respondents reported job satisfaction, 42.1% reported experiencing workplace discrimination/harassment within the past 5 years; most commonly, this was perpetrated by fellow faculty (31.7%; 58/183) or patients or their family members (31.7%; 58/183). Respondents felt that gender, race/ethnicity, and age were the three top reasons for discrimination/harassment, with double the amount of racialized ROs reporting harassment compared to White ROs (p < 0.001). Nearly half (45.2%; 114/252) did not understand how to report, or felt uncomfortable reporting, workplace discrimination/harassment. Conclusions: This study highlights high harassment and discrimination rates amongst Canadian ROs, especially amongst racialized women, which may affect career satisfaction and attrition rates. Compared to census data, Black, Indigenous, and Southeast Asian ROs were underrepresented, and amongst racialized ROs, racialized women were significantly underrepresented. These findings underscore the need for targeted diversity initiatives, improved mentorship programs, and stronger institutional policies to address harassment and foster an inclusive work environment. Full article

Breast cancer is the most common cancer among women in Canada. Its presentation and outcomes vary significantly by race/ethnicity. This study explores breast cancer incidence, age at diagnosis, stage, subtype, and mortality, comparing Black and White women aged 20 years and older, using the 2011 and 2016 Canadian Census Health and Environment Cohorts databases. Black women were disaggregated into Caribbean, Central/West African (C/WA), Southern/East African (S/EA), and “Other” ancestry groups. The Black female study population had a lower mean age (43.0 years) than the White (50.5 years). Black women had lower overall age-standardized breast cancer incidence than White women. The age-specific incidence in Black women ages 30–39 of Caribbean origin was higher (RR 95% CL, 1.36, 1.04–1.79; 58.7 vs. 43.1 cases/100,000 person-years) than in White. White women had 14.6% of cases diagnosed at ages 20–49 compared to over 50% in Black women of C/WA and S/EA origins, with highest proportions of diagnoses occurring at least 10 years earlier among Black women (C/WA 46, S/EA 48, Caribbean 57, White 67). Proportions of prognostic stage I diagnoses were less common among Black vs. White women (53.2% vs. 65.9%, p < 0.0001), and triple negative breast cancer was more frequent among Black women (17.1% vs. 9.9%, p < 0.0001), particularly those of Central/West African ancestry (21.8%). Higher age-specific mortality was observed among Black women with Caribbean origins aged 40–49 (RR 95% CL, 1.70, 1.19–2.42) and 50–59 (RR 95% CL, 1.42, 1.08–1.88) compared to White women. Breast cancer characteristics and outcomes vary substantially by ancestry within Canada’s Black population. Tailored screening strategies accounting for earlier onset and aggressive subtypes may help mitigate disparities. Full article

Black-identifying patients face many barriers to the receipt of equitable breast cancer care; however, little is currently known about the unique needs of this patient population, particularly in Canada. To address this gap, we identified and thematically grouped constructs from the published literature reporting on the needs of Black-identifying patients with breast cancer and compared these findings to a list generated through a virtual nominal consensus group (NG) attended by Canadian patients with breast cancer who self-identified as Black (n = 3). A scoping review was undertaken, and relevant citations published from database inception until January 2025 were identified from MEDLINE, Embase, and CINAHL. The literature review yielded 34 articles from the United States and identified 15 constructs consistent with the NG, which spanned the cancer continuum from screening to survivorship. The NG identified four additional constructs that were not found in the literature: advocacy and outreach, communication and health literacy, comorbidities and personalized care, and end-of-life care. The final set of constructs was then validated and prioritized by an expert panel consisting of patients with lived experience and relevant community partner organizations (n = 9) to drive future research, advocacy, and policy work. Patient navigation was identified as the top need, with financial support, access to culturally tailored information and resources, culturally relevant care, racialized data for treatment decision-making, and emotional support identified as high-priority needs. Full article

Canada goldenrod (Solidago canadensis L.), a short-day plant commonly cultivated as a cut flower, depends on proper lighting management to obtain long stems and higher commercial value. Thus, this study aimed to determine the effect of modifying the light spectrum through the installation of light-emitting diodes (LEDs) and the use of colored shade nets on the production and quality of Canada goldenrod stems. The treatments used were colored shade nets and different LED lighting treatments. Production per plant and productivity per square meter were determined. Twenty stems were selected and evaluated for: stem length; inflorescence length and width; number of floral ramets per inflorescence; number of leaves; stem base diameter (mm); and fresh stem biomass (g). Canada goldenrod plants require an extension of the light period with artificial lighting to produce higher-quality stems, regardless of whether the bulbs emit red or white light. The use of nets with 50% red and white shading promoted higher production and elongation of Canada goldenrod stems, with a production that reached up to 4.2 floral stems per plant and 100.3 floral stems per square meter using the red shade net and white LED. These floral stems were of high commercial standard, with a length of up to 81.35 cm with the red shade net and red LED, and were 31 cm in diameter for the inflorescences, approximately, under black or white shade nets and white or red LEDs. More robust floral stems with greater biomass were observed using any shade net color and LED lamps. Full article

While often framed as historical or ‘post’colonial, the pervasive legacies of anti-Black racism, rooted in the afterlives of slavery and the dehumanization of African, Caribbean, and Black (ACB) voices, continues to shape the health experiences of young ACB women in Ontario, Canada. Using an intersectional framework, this qualitative study utilized focus groups (n = 24) to understand factors influencing access to sexual and reproductive health services for young ACB women in southern Ontario. The findings reveal that fostering ACB youth engagement in the design and facilitation of healthcare programs will be vital for creating more responsive spaces to fully express sexual health concerns. It also demonstrates that Eurocentric biomedical frameworks continue to obscure young ACB women’s needs, emphasizing the necessity for culturally relevant care. Lastly, the findings indicate that internalized colonial narratives around health practices perpetuate intergenerationally, further complicating young ACB women’s access to adequate sexual and reproductive healthcare. This examination illuminates the need to address the colonial legacies within healthcare systems that continue to pathologize and hypersexualize young ACB women’s bodies. The study concludes by advocating for intersectional, youth-centered, and culturally competent approaches to dismantling the barriers young ACB women face in accessing sexual and reproductive health services. Full article

Ethnicity-based public health inequities continue worldwide, reflecting established failures in law, governance, and social justice. International legal instruments, including the International Covenant on Economic, Social and Cultural Rights (ICESCR), the Convention on the Elimination of All Forms of Racial Discrimination (CERD), and the United Nations Declaration on the Rights of Indigenous Peoples (UNDRIP), obligate states to provide equitable access to healthcare and address structural components of inequality. This article critically evaluates the effectiveness of these frameworks in advancing health equity, adopting a black-letter legal approach integrated with the social determinants of health models to assess whether ratified commitments have translated into quantifiable changes for marginalized ethnic populations. Case studies from Canada, Australia, and the United States—high-capacity health systems with entrenched inequities—portray the gap between normative commitments and practical implementation. Findings demonstrate that while international law has shaped discourse, promoted civil society advocacy, and influenced select policy reforms, weak enforcement, reliance on voluntary compliance, and insufficient accountability mechanisms curb its capability to generate consistent outcome-based change. Recommendations include establishing a framework convention on global health equity, strengthening the WHO’s mandate on racial justice, improving ethnic-disaggregated data reporting, and ingraining affected communities in policymaking. Normative strength is apparent, but operational impact remains dependent on an enforceable framework and sustained political will. Full article

Black Canadians are one of the fastest-growing groups in Canada, with 59% of this population comprising immigrants. Ongoing systemic racism and discrimination have serious consequences for the mental health of Black Canadians. While research and policy efforts to address the mental health needs of this population are ongoing, a greater understanding of the healing practices relevant to this diverse population is needed. This scoping review synthesized and discussed key features of culturally inclusive, affirming, and contextually relevant approaches and practices for mental health care and healing with Black Canadians, as well as identified limitations and gaps in the current research. This study followed the PRISMA guidelines for scoping reviews and conducted a search in PsycINFO, MEDLINE, Embase, SocINDEX, CINAHL, Sociological Abstracts, and Global Health in October 2023. A total of 34 articles met the inclusion criteria. The review identified that most studies were conducted in one Canadian province (i.e., Ontario) and involved diverse perspectives, including service users and providers. The thematic review of articles revealed limited research regarding specific interventions, but identified many commonly reported features of culturally and contextually relevant approaches to mental health care and healing for Black Canadians that broaden the scope of mental health care beyond Euro-Western clinical models, including taking a holistic and empowerment-based approach, engaging in culturally affirming care, a social justice approach, community-centred and collaborative healing, and the necessity of practitioner education. Recommendations for practice, policy, education, and research are provided to support more inclusive and responsive mental health care systems for Black Canadians. Full article

The cumulative impact of decades of oil and gas exploration has left Alberta’s boreal forests densely fragmented by seismic lines, which are expected to naturally regenerate; however, recovery is often highly variable and generally poor in peatlands due to increased wetness and reduced microtopography. In this study, we evaluated seismic lines in lowland ecosites with some degree of successful natural regeneration to gain a better understanding of the natural recovery process in these areas. We compared stand characteristics between the seismic line (23 to 48 years post-disturbance) and the adjacent undisturbed forest. We found that soil properties were similar, but seedling (height < 1.3 m) density was significantly higher on the seismic line, with 252% more tamarack and 65% more black spruce than in the adjacent forest. Relative to the adjacent forest, there were significantly fewer trees (height > 1.3 m) on the seismic line, with an 84% and 50% reduction in black spruce and tamarack, respectively. By analyzing tree ring data from seismic lines, we found that the length of time before tree establishment was 10 years for black spruce and 8 years for tamarack. On average, it took 12 years for tree density to reach 2000 stems per hectare (sph). We modeled growth rates for black spruce and tamarack and found that they were growing faster than their adjacent forest counterparts, reaching 3 m after an average of 38 and 33 years, respectively. Stands on seismic lines were projected to a final stand age of 61 years using the Mixedwood Growth Model (MGM) to evaluate future stand characteristics. Full article

The global Black Lives Matter movement and COVID-19 pandemic drew attention to the urgency of addressing entrenched structural dynamics such as racialization, gender, and colonization shaping health inequities for diverse racialized people. Canadian community-based research with racialized immigrant women recognized the need to enhance service provider capacity using a strengths-based activism approach to support client health and wellbeing. In this study, we aimed to understand the impacts of this mental health promotion practice on service providers and strategies to support them. Through purposeful convenience sampling, three focus groups were completed with 19 service providers working in settlement and mental health services in Toronto, Canada. Participants represented varied ethnicities and work experiences; most self-identified as female and racialized, with experiences living as immigrant women in Canada. Postcolonial feminist and critical mental health promotion analysis illuminated organizational and structural dynamics contributing to burnout and vicarious trauma that necessitate a focus on trauma- and violence-informed care. Transformative narratives reflected service provider resilience and activism, which aligned with and challenged mainstream biomedical approaches to mental health promotion. Implications include employing a postcolonial feminist lens to identify meaningful and comprehensive anti-oppression strategies that take colonialism, racialization, gender, and ableism and their intersections into account to decolonize nursing practices. Promoting health equity for diverse racialized women necessitates focused attention and multilevel anti-oppression strategies aligned with critical mental health promotion practices. Full article

African, Caribbean, and Black (ACB) communities face increased COVID-19 morbidity and mortality, coupled with significant barriers to vaccine acceptance and uptake. Addressing these challenges requires innovative, multifaceted strategies. Peer-led interventions, grounded in critical health literacy (CHL) and critical racial literacy (CRL), and integrating collaborative equity learning processes, can enhance community capacity, empowerment, and health outcomes, contributing to long-term health equity. This paper describes and presents the evaluative outcomes of a peer-led intervention aimed at enhancing COVID-19 vaccine confidence and acceptance. The Peer-Equity Navigator (PEN) intervention consisted of a specialized training curriculum grounded in CHL and CRL. Following training, PENs undertook a 5-month practicum in community or health settings, engaging in diverse outreach and educational activities to promote vaccine literacy in ACB communities. The evaluation utilized a modified Reach, Effectiveness, Adoption, Implementation, and Maintenance (RE-AIM) Framework, using quantitative and qualitative methods to collect data. Sources of data included tracking records with community feedback, and a PEN focus group, to assess program feasibility, outreach, and effectiveness. From 16 September 2022, to 28 January 2023, eight trained PENs conducted 56+ community events, reaching over 1500 community members. Both PENs and community members reported high engagement, endorsing peer-led, community-based approaches and increased vaccine literacy. The PEN approach proves feasible, acceptable, and effective in promoting positive health behaviors among ACB communities. This intervention has clear implications for health promotion practice, policy, and research in equity-deserving communities, including immigrants and refugees, who also face multiple and intersecting barriers to health information and care. Full article

Blackness, both as a racial identity and a marker of cultural difference, disrupts the hegemonic norms embedded in dominant forms of cultural capital. This article examines how first- and second-generation Haitian and Jamaican communities in Ontario and Quebec negotiate Blackness within a Canadian context. Drawing from international literature, it introduces distinctly Canadian concepts—such as polite racism, racial ignominy, and duplicity of consciousness—to illuminate local racial dynamics. Using Yosso’s (2005) framework of community cultural wealth, the study analyzes six forms of cultural capital—linguistic, aspirational, social, navigational, resistant, and familial—as employed by Afro-Caribbeans to navigate systemic exclusion. The article expands the limited Canadian discourse on Black identity and offers theoretical tools for understanding how cultural capital is shaped and constrained by race in multicultural democracies. Full article

This study describes a quite special and interesting atmospheric event characterized by the simultaneous presence of fresh and aged smoke layers. These peculiar conditions occurred on 16 July 2024 at the CNR-IMAA atmospheric observatory (CIAO) in Potenza (Italy), and represent an ideal case for the evaluation of the impact of aging and transport mechanisms on both the optical and microphysical properties of biomass burning aerosol. The fresh smoke was originated by a local wildfire about 2 km from the measurement site and observed about one hour after its ignition. The other smoke layer was due to a wide wildfire occurring in Canada that, according to backward trajectory analysis, traveled for about 5–6 days before reaching the observatory. Synergetic use of lidar, ceilometer, radar, and microwave radiometer measurements revealed that particles from the local wildfire, located at about 3 km a.s.l., acted as condensation nuclei for cloud formation as a result of high humidity concentrations at this altitude range. Optical characterization of the fresh smoke layer based on Raman lidar measurements provided lidar ratio (LR) values of 46 ± 4 sr and 34 ± 3 sr, at 355 and 532 nm, respectively. The particle linear depolarization ratio (PLDR) at 532 nm was 0.067 ± 0.002, while backscatter-related Ångström exponent (AEβ) values were 1.21 ± 0.03, 1.23 ± 0.03, and 1.22 ± 0.04 in the spectral ranges of 355–532 nm, 355–1064 nm and 532–1064 nm, respectively. Microphysical inversion caused by these intensive optical parameters indicates a low contribution of black carbon (BC) and, despite their small size, particles remained outside the ultrafine range. Moreover, a combined use of CIAO remote sensing and in situ instrumentation shows that the particle properties are affected by humidity variations, thus suggesting a marked particle hygroscopic behavior. In contrast, the smoke plume from the Canadian wildfire traveled at altitudes between 6 and 8 km a.s.l., remaining unaffected by local humidity. Absorption in this case was higher, and, as observed in other aged wildfires, the LR at 532 nm was larger than that at 355 nm. Specifically, the LR at 355 nm was 55 ± 2 sr, while at 532 nm it was 82 ± 3 sr. The AEβ values were 1.77 ± 0.13 and 1.41 ± 0.07 at 355–532 nm and 532–1064 nm, respectively and the PLDR at 532 nm was 0.040 ± 0.003. Microphysical analysis suggests the presence of larger, yet much more absorbent particles. This analysis indicates that both optical and microphysical properties of smoke can vary significantly depending on its origin, persistence, and transport in the atmosphere. These factors that must be carefully incorporated into future climate models, especially considering the frequent occurrences of fire events worldwide. Full article