Narrow Categories Research Articles

Mapping the Knowledge Structure of Image Recognition in Cultural Heritage: A Scientometric Analysis Using CiteSpace, VOSviewer, and Bibliometrix.

The application of image recognition techniques in the realm of cultural heritage represents a significant advancement in preservation and analysis. However, existing scholarship on this topic has largely concentrated on specific methodologies and narrow categories, leaving a notable gap in broader understanding. This study aims to address this deficiency through a thorough bibliometric analysis of the Web of Science (WoS) literature from 1995 to 2024, integrating both qualitative and quantitative approaches to elucidate the macro-level evolution of the field. Our analysis reveals that the integration of artificial intelligence, particularly deep learning, has significantly enhanced digital documentation, artifact identification, and overall cultural heritage management. Looking forward, it is imperative that research endeavors expand the application of these techniques into multidisciplinary domains, including ecological monitoring and social policy. Additionally, this paper examines non-invasive identification methods for material classification and damage detection, highlighting the role of advanced modeling in optimizing the management of heritage sites. The emergence of keywords such as 'ecosystem services', 'models', and 'energy' in the recent literature underscores a shift toward sustainable practices in cultural heritage conservation. This trend reflects a growing recognition of the interconnectedness between heritage preservation and environmental sciences. The heightened awareness of environmental crises has, in turn, spurred the development of image recognition technologies tailored for cultural heritage applications. Prospective research in this field is anticipated to witness rapid advancements, particularly in real-time monitoring and community engagement, leading to the creation of more holistic tools for heritage conservation.

Advancing Source Tracking: Systematic Review and Source-Specific Genome Database Curation of Fecally Shed Prokaryotes.

Advancements within fecal source tracking (FST) studies are complicated by a lack of knowledge regarding the genetic content and distribution of fecally shed microbial populations. To address this gap, we performed a systematic literature review and curated a large collection of genomes (n = 26,018) representing fecally shed prokaryotic species across broad and narrow source categories commonly implicated in FST studies of recreational waters (i.e., cats, dogs, cows, seagulls, chickens, pigs, birds, ruminants, human feces, and wastewater). We find that across these sources the total number of prokaryotic genomes recovered from materials meeting our initial inclusion criteria varied substantially across fecal sources: from none in seagulls to 9,085 in pigs. We examined genome sequences recovered from these metagenomic and isolation-based studies extensively via comparative genomic approaches to characterize trends across source categories and produce a finalized genome database for each source category which is available online (n = 12,730). On average, 81% of the genomes representing species-level populations occur only within a single source. Using fecal slurries to test the performance of each source database, we report read capture rates that vary with fecal source alpha diversity and database size. We expect this resource to be useful to FST-related objectives, One Health research, and sanitation efforts globally.

Cardiovascular adverse events associated with antibody-drug conjugates (ADCs): a pharmacovigilance study based on the FAERS database.

As a novel drug formulation, antibody drug conjugates (ADCs) are widely used in various types of cancer. However, clinically, there is a lack of attention to the CVD produced by them, as well as a lack of research on the real-world situation. Using the Food and Drug Administration Adverse Event Reporting System (FAERS) database, to ensure its clinical safety application, we analyzed post-marketing data on antitumor ADCs to identify risk factors and drugs associated with the risk of cardiovascular events. We used OpenVigil 2.1 to conduct a database query for adverse events (AEs) reported to the FAERS database between the time the drug was launched and the second quarter of 2023. Cardiovascular adverse events (AEs) were grouped into fourteen narrow categories using the Standardized Medical Dictionary for Regulatory Activities (MedDRA) Queries (SMQs), and the reporting odds ratio (ROR) and the proportional reporting ratio (PRR) for reporting the association between different drugs and cardiovascular disease (CVD) risk were calculated. In the FAERS database, 1863 AEs associated with CVD we studied were identified in patients receiving ADC therapy. Most reports came from people aged ≥65, but a significant number of cases were found to be unknown. The number of patients with antibody-drug conjugates (ADCs)-related CVD cases aged <18years, 18-64years, and≥ 65years was 52 (2.79%), 586 (31.45%), and 613 (32.90%), respectively. The proportion of female patients (834, 44.77%) was higher than that of male patients (752, 40.37%). Death (770 reports), disability (9 reports), Hospitalization initial or prolonged (407 reports), and life-threatening reactions (187 reports). Of the 770 deaths reported, 103 (31.7%) were associated with brentuximab vedotin, 10 (24.4%) with sacituzumab govitecan, 22 (19.3%) with enfortumab vedotin, and 35 (34.7%) with trastuzumab emtansine.49 (41.2%) cases were associated with polatuzumab vedotin, 62 (29%) with trastuzumab deruxtecan, 423 (54.3%) with gemtuzumab ozogamicin, and 66 (38.8%) with inotuzumab ozogamicin. In a disproportionate number of SMQS, cardiac failure (n = 277) and embolic and thrombotic events, venous (n = 446) were the most frequently reported CVD-related AEs in ADCs. By mining the FAERS database, we provided relevant information on the association between ADC use and cardiovascular-associated AEs. ADCs were associated with increased cardiovascular toxicity, deserving distinct monitoring and appropriate management. Further research is needed to confirm these findings and assess causality.

Usefulness of Heart Failure Categories Based on Left Ventricular Ejection Fraction.

Heart failure guidelines have recently introduced a narrow category with mildly reduced left ventricular ejection fraction (LVEF) (heart failure with mildly reduced ejection fraction; LVEF 41%-49%) between the previous categories of reduced (heart failure with reduced ejection fraction; LVEF ≤40%) and preserved (heart failure with preserved ejection fraction; LVEF ≥50%) ejection fraction. Grouping of continuous measurements into narrow categories can be questioned if their variability is high. We constructed a cohort of all 9716 new cases of chronic heart failure with an available LVEF in Stockholm, Sweden, from January 1, 2015, until December 31, 2020. All values of LVEF were collected over time, and patients were followed up until death, moving out of Stockholm, or end of study. Mixed models were used to quantify within-person variance in LVEF, and multistate Markov models, with death as an absorbing state, to quantify the stability of LVEF categories. LVEF values followed a normal distribution. The SD of the within-person variance in LVEF over time was 7.4%. The mean time spent in any LVEF category before transition to another category was on average <1 year for heart failure with mildly reduced ejection fraction. Probabilities of transitioning between categories during the first year were substantial; patients with heart failure with mildly reduced ejection fraction had a probability of <25% of remaining in that category 1 year later. LVEF follows a normal distribution and has considerable variability over time, which may impose a risk for underuse of efficient treatment. The heart failure with mildly reduced ejection fraction category is especially inconstant. Assumptions of a patient's current LVEF should take this variability and the normal distribution of LVEF into account.

Comparative Effectiveness of Perioperative Antibiotic Regimens to Prevent Surgical Site Infections in Pediatric Liver Transplant Recipients.

Surgical site infections (SSIs) are a common complication in liver transplant (LT) recipients. Lack of pediatric prophylaxis guidelines results in variation in preventative antibiotic regimens. We performed a retrospective observational study of LT recipients <18 years old using a merged data set that included data from the Pediatric Health Information System and the United Network for Organ Sharing between 2006 and 2017. The exposure was defined as the antibiotic(s) received within 24 hours of LT, with 6 categories, ranging from narrow (category 1: cefazolin), to broad). The primary outcome was presence or absence of SSI in the index admission. Mixed-effects logistic regression compared the effectiveness of each category in preventing SSI, relative to category 1. Of the 2586 LT, 284 (11%) met SSI criteria. The SSI rate was higher in the younger subcohort (16.2%) than in the older (8.6%), necessitating a stratified analysis. Antibiotics from category 5 were most commonly used. In the younger subcohort, the adjusted risk was increased in all categories compared with the reference, most notably in category 3 (odds ratio [OR], 2.58 [95% confidence interval: .69-9.59]) and category 6 (2.76 [.66-11.56]). In the older subcohort, estimated ORs were also increased for each category, most notably in category 4 (2.49 [95% confidence interval: .99-6.27]). None of the ORs suggested benefit from broader-spectrum prophylaxis. Our E-value assessment suggests that it's unlikely there is unmeasured confounding by indication to the degree necessary to revert ORs to protective. There was wide variation in antibiotic prophylaxis. Adjusted analyses did not reveal a protective benefit of broader-spectrum prophylaxis in either subcohort, suggesting that narrower regimens may be adequate.

Cardiovascular adverse events associated with targeted therapies for multiple myeloma: a pharmacovigilance study.

Multiple myeloma (MM) is a leading cause of hematopoietic cancer-related mortality, accounting for 20% of deaths. MM-targeted therapies have demonstrated efficacy, and since 2015, the United States Food and Drug Administration (FDA) has approved five targeted drugs. However, their cardiovascular safety has not been comprehensively evaluated. This study aimed to investigate the association between MM-targeted therapy and cardiovascular adverse events (AEs). Disproportionality analysis was conducted on reports from the FDA AE Reporting System database from 2014 to the second quarter of 2023. Cardiovascular AEs were grouped into nine narrow categories using the Standardized Medical Dictionary for Regulatory Activities Queries (SMQs). A total of 3,228 cardiovascular AE cases involving MM-targeted therapy were extracted and analyzed. Significant disproportionality was identified for daratumumab, elotuzumab, and isatuximab. Among the nine narrow SMQ categories, the three most reported cardiovascular AEs were cardiomyopathy, cardiac arrhythmias, and embolic and thrombotic events. Noninfectious myocarditis/pericarditis, cardiac arrhythmias, and embolic and thrombotic events exhibited the strongest signal strengths. The cardiovascular AE risk was higher within the first month and gradually decreased thereafter; however, it increased rapidly again after 1 year. This trend was observed for all cardiovascular AEs. The Kaplan-Meier curve and the log-rank test revealed that isatuximab and elotuzumab exhibited a significantly lower probability of cardiovascular AEs than daratumumab (p < 0.001). MM-targeted therapy is significantly associated with an increased risk of previously unknown cardiovascular AE profiles, with the range and onset differing among various drugs, thereby warranting specific monitoring and appropriate management.

Features of social protection by implementing the right to disconnect

The article examines the realisation of the right to disconnect in the framework of workers’ social protection. The study explores different approaches to the definition of a new right. The right to disconnect is analysed on the basis of targeting and universality of social protection, soft and hard measures, the components of the new right, which include workers’ opportunity, employers’ responsibility, communication between employers and workers, protection from adverse consequences. The legal acts that serve as a foundation of the right to disconnect create a separate work pattern of teleworkers, which affects the formation of the targeting approach to social protection. The regulation of the right to disconnect introduced in European Social Partner framework agreement on digitalisation and European Parliament resolution of 21 January 2021 with recommendations to the Commission on the right to disconnect gives a more universal approach. The Resolution acknowledges the right to disconnect as a fundamental right and proposes hard regulatory and technological measures to ensure observation of work and rest periods. The agreement is based on the change in corporate culture. It is revealed that nowadays the right to disconnect serves as the only project aimed at regulating digital working relations in the framework of social protection of remote workers, however R2D can be limited by a narrow category of teleworkers. Debates over the right to disconnect touch upon the issue of the effectiveness of social dialogue in the context of adaptation to digital work organisation, as well as the possibility of keeping binary understanding of work and rest periods.

Does openness of articles get higher attention in altmetric? An investigation of medical discipline

Purpose This paper aimed to explore the presence of altmetric data across the sub-categories of the medical science discipline and also explore whether the openness of articles results in (dis)advantage for altmetrics mentions. Design/methodology/approach The research implies data carpentry methods for gathering bibliographic data related to narrow fields of medical science discipline from the Scopus database with at least one Indian author affiliation during 2012–2021. The corresponding data were also collected from three different sources: Altmetric.com, Mendeley.com and Unpaywall.org, using OpenRefine and REST/API calls. Further, the authors observed open access altmetric advantages (OAAA) and categorical OAAA (COAAA) across seven altmetric platforms for all articles as well as discipline-wise. Findings The result shows that the overall coverage of altmetric events is still low, but it shows an increasing trend from the past. Mendeley has the largest coverage; almost 97.12% of publications are covered. The health policy discipline has extensive coverage across altmetric platforms (nearly 57.40% of publications in altmetrics and 99.23% in Mendeley), whereas the drug guides has the lowest (almost 0.92% in Altmetrics and 77.05% in Mendeley). Moreover, the OA articles have been highly covered in altmetrics than those of non-OA articles, and bronze OA articles covered mostly compared to others. News registered with the significant OA altmetric advantages across disciplines. Categorically, bronze and hybrid OA have the largest altmetric advantages. Originality/value This research is a unique attempt to apply OAAA and COAAA to explore OA altmetric advantages of narrow subject categories of medical science disciplines.

Harm Through Those Supposed To Heal

This article bases its findings on an extensive praxeological reconstruction of medical involvement in torture in Syria since 2011. The research was conducted from 2021–2023 by examining reports of human rights organisations and activists, the accounts of survivors as well as trial reports and academic literature. After outlining an inexhaustive list of prevalent patterns of medical involvement in torture compiled for the overall reconstruction of this practice, three prevalent patterns will be portrayed more closely. These patterns suggest benefits and research-stimulating open questions resulting from exploratively employing harm as an analytical concept in violence research: (1.) Medical negligence and arbitrary treatment, (2.) anamnesis and the exploitation of medical history, and (3.) the broader pattern of transporting people to and detaining them in military hospitals. This article supposes that employing harm as an analytical concept in violence research can free us from too narrow (legal) categories, allows us to look beyond over-simplified dichotomies of perpetrators and victims, enables us to discuss epistemic impacts of the practice, and further allows us to revisit definitions like the one of medical involvement in torture.

Usefulness of heart failure categories based on left ventricular ejection fraction

Abstract Funding Acknowledgements Type of funding sources: Private company. Main funding source(s): This study was sponsored by AstraZeneca. Introduction Heart failure, a common disease with a mortality on par with many cancers, is one of the costliest diseases to society in the western world. Current heart failure guidelines are based on categories of left ventricular ejection fraction (LVEF) and have recently introduced a narrow category with mid-range/mildly reduced ejection fraction (HFmrEF; LVEF 41-49%) between the previous categories with reduced (HFrEF; LVEF ≤40%) and preserved (HFpEF; LVEF ≥50%) ejection fraction. The grouping of continuous variables into narrow categories can be questioned if the variability is high. Purpose To determine the shape of the LVEF distribution and quantify the stability of LVEF categories over time in a large real-world heart failure population, in order to establish the usefulness of LVEF categories for treatment decisions. Methods Population-based observational cohort study of all new cases of chronic heart failure in Region Stockholm, Sweden, from 2016-01-01 until 2020-12-31. All available values of LVEF were collected over time and patients were followed until death or end of study. Mixed models were used to quantify within-person variance in LVEF, and Multistate Markov models, with death as an absorbing state, to quantify the stability of LVEF categories. Results During the study period, 8,455 patients were diagnosed with heart failure. LVEF values followed a perfect normal distribution. The standard deviation of the within-person variance in LVEF was 7.4%. Regardless of initial LVEF category, age or sex, the mean time spent in any LVEF category before transition to another category (mean sojourn time) was on average less than 0.6 years (Figure 1). The one-year probabilities of transitioning between states were substantial (Figure 2). Patients with HFmrEF had a probability of 1/4 of remaining in that category one year later; the probability of patients with HFrEF of remaining in that category one year later was 1/4 for women and 1/3 for men; and patients with HFpEF had a probability of remaining in that category of 2/3 for women and 1/2 for men. Conclusion In patients with heart failure, LVEF has considerable variability over time. Hence, LVEF has limited use for categorisation of the heart failure population into narrow categories.

Effects of Particle Size, Charge, Shape, Animal Disease State, and Sex on the Biodistribution of Intravenously Administered Nanoparticles

AbstractThe relationship between nanoparticle size, charge, shape, and in vivo biodistribution is of great importance for the rational design and selection of intravenously administered nanoparticles. A resource that aids in the selection and design of nanomaterials for this purpose would be a valuable tool. Previous literature reviews have examined narrow categories of nanomaterials or have not statistically analyzed a broad range of nanomaterial literature. Here, data regarding the biodistribution of intravenously administered synthetic and organic nanomaterials in animal models from literature available in PubMed is collected. This work outlines the effect of nanoparticle size, charge, shape, animal sex, and animal disease status on biodistribution of intravenously administered nanomaterials. Particle size and charge are found to significantly and independently influence biodistribution to several organs. Finally, animal sex and disease state are observed to function as effect modifiers for biodistribution.

Person-centred Approaches to Psychopathology in the ABCD Study: Phenotypes and Neurocognitive Correlates.

Issues with classifying psychopathology using narrow diagnostic categories have prompted calls for the use of dimensional approaches. Yet questions remain about how closely dimensional approaches reflect the way symptoms cluster in individuals, whether known risk factors (e.g. preterm birth) produce distinct symptom phenotypes, and whether profiles reflecting symptom clusters are associated with neurocognitive factors. To identify distinct profiles of psychopathology, latent class analysis was applied to the syndrome scales of the parent-reported Child Behaviour Checklist for 11,381 9- and 10- year-olds from the Adolescent Brain Cognitive Development study. Four classes were identified, reflecting different profiles, to which children were assigned probabilistically; Class 1 (88.6%) reflected optimal functioning; Class 2 (7.1%), predominantly internalising; Class 3 (2.4%), predominantly externalising; and Class 4 (1.9%), universal difficulties. To investigate the presence of a possible preterm behavioural phenotype, the proportion of participants allocated to each class was cross-tabulated with gestational age category. No profile was specific to preterm birth. Finally, to assess the neurocognitive factors associated with class membership, elastic net regressions were conducted revealing a relatively distinct set of neurocognitive factors associated with each class. Findings support the use of large datasets to identify psychopathological profiles, explore phenotypes, and identify associated neurocognitive factors.

Implementation of a Collaborative Recommendation System Based on Multi-Clustering

The study aims to present an architecture for a recommendation system based on user items that are transformed into narrow categories. In particular, to identify the movies a user will likely watch based on their favorite items. The recommendation system focuses on the shortest connections between item correlations. The degree of attention paid to user-group relationships provides another valuable piece of information obtained by joining the sub-groups. Various relationships have been used to reduce the data sparsity problem. We reformulate the existing data into several groups of items and users. As part of the calculations and containment of activities, we consider Pearson similarity, cosine similarity, Euclidean distance, the Gaussian distribution rule, matrix factorization, EM algorithm, and k-nearest neighbors (KNN). It is also demonstrated that the proposed methods could moderate possible recommendations from diverse perspectives.

Global vs. Local: A Quantitative Study of Factors Influencing Italian Consumers’ Preference in the Purchase of Food Products

Purpose: The study intends to expand the current literature on Italian consumers’ brand preferences between local vs. global alternatives in the specific Italian food sector. Design/methodology/approach: This study draws on concepts largely investigated like cultural identity theory, consumer ethnocentrism, and product category involvement to examine the mechanisms that drive Italian consumers to prefer alternative local or global brands in the food sector. A non-hierarchical cluster analysis represents the core part of the quantitative research that involved 412 participants. Findings: By confirming the validity of existing studies, the present paper contributes to the food consumption literature by testing a conceptual model that integrates previous research concepts, thus deepening the analysis of the factors affecting Italian consumers’ food brand preferences. The cluster analysis allowed for dividing Italian consumers into two distinguished groups with characteristics coherent inside the same group. Research limitations/implications: This study emphasizes the key relevance of the investigated variables in the implementation of positioning and communication strategies aimed at meeting the needs of specific markets in which firms operate, and it highlights the importance of analyzing those variables together. The sample composed of Italian consumers did not allow the generalizability of the results. Furthermore, this study focuses on the narrow category of chocolate bar products. Therefore, this does not permit the results to be generalized to other food products. Originality/value: The novel research is based on signaling theory that contributes to the local and global branding domains from the Italian perspective. This work is also the first to analyze the food sector and the importance that Italians attribute to their food products and traditions through a cluster analysis approach.

“IT’S NOT ENOUGH TO HOLD THAT POWER”: THE GENDERING OF ADVICE IN CORPORATE DISCOURSE

In this qualitative study, we analyze advice literature written by corporate women for women readers who want to rise in the corporate ranks. Advice is pervasive social practice, and rests on an asymmetry of knowledge between authors and readers. We use discourse analysis to examine how authors of advice books deploy strategies to instruct, encourage, and exhort women to do better. We identify four strategies that expand on the current literature: pronoun choice and alignment, credibility, the assertion of necessity, and the use of metaphors. We find that advice literature re-creates narrow gender categories and dichotomous performances of gender for women to carry out. Rather than offer alternatives, advice to corporate women works toward ratification of gender norms, ratifying a notion of women’s shortcomings.

Cardiovascular toxicity associated with angiogenesis inhibitors: A comprehensive pharmacovigilance analysis based on the FDA Adverse Event Reporting System database from 2014 to 2021

BackgroundThe profiles of cardiovascular toxicity associated with angiogenesis inhibitors, including intravenous monoclonal antibodies (mAbs) and oral tyrosine kinase inhibitors (TKIs), targeting vascular endothelial growth factor (VEGF) remain poorly elucidated in real-world settings. This pharmacovigilance analysis aimed to comprehensively investigate the frequency, spectrum, timing, and outcomes of cardiovascular toxicities associated with angiogenesis inhibitors and to explore the differences in such patterns between mAbs and TKIs.MethodsDisproportionality analysis was performed by leveraging reports from the FDA Adverse Event Reporting System (FAERS) database from 2014 to 2021. Cardiovascular adverse events (AEs) were grouped into nine narrow categories using the Standardized Medical Dictionary for Regulatory Activities (MedDRA) Queries (SMQs). Reporting odds ratio (ROR) and information components (ICs) were calculated with statistical shrinkage transformation formulas and a lower limit of 95% confidence interval (CI) for ROR (ROR025) > 1 or IC (IC025) > 0, with at least three reports being considered statistically significant.ResultsA total of 757,577 reports of angiogenesis inhibitors and 70,668 (9.3%) reports of cardiovascular AEs were extracted. Significant disproportionality was detected in angiogenesis inhibitors for cardiovascular AEs (IC025/ROR025 = 0.35/1.27). Bevacizumab (31.8%), a mAb, presented the largest number of reports, followed by sunitinib (12.4%), a TKI. Hypertension (SMQ) was detected with the strongest signal value (IC025/ROR025 = 1.73/3.33), followed by embolic and thrombotic events (SMQ) (IC025/ROR025 = 0.32/1.26). Hypertension showed the shortest time to onset with a median (interquartile range) value of 23 (8, 69) days, while embolic and thrombotic events had the longest value of 51 (16, 153) days. Notably, hypertension presented the lowest proportions of death and life-threatening events (10.9%), whereas embolic and thrombotic events posed the highest (29.3%). Furthermore, both mAbs (IC025/ROR025 = 0.47/1.39) and TKIs (IC025/ROR025 = 0.30/1.23) showed increased cardiovascular AEs. Hypertension was detected in both agents (IC025/ROR025 = 1.53/2.90 for mAbs and IC025/ROR025 = 1.83/3.56 for TKIs) with a shorter time to onset of 17 (6, 48) days for TKIs than mAbs of 42 (14, 131) days. By contrast, embolic and thrombotic events were detected for mAbs (IC025/ROR025 = 0.90/1.87) without TKI (IC025/ROR025 = −0.08/0.95).ConclusionAngiogenesis inhibitors were associated with increased cardiovascular toxicity with a discrepancy between intravenous mAbs and oral TKIs, deserving distinct monitoring and appropriate management.

Reaching ‘the Vulnerable’ by Working from the Heart?

This article considers how the image of a caring state is both performed and contested by the actual workings of Zimbabwe’s volunteer community case workers (CCWs). According to their policy mandate, the volunteers’ commitment to registering ‘the vulnerable’ and mobilising them for different welfare project purposes is based on an assumed affective closeness to their communities. Ethnographic investigation also identifies community-level care work as an affectively and economically charged field, where the CCWs navigate conflicting expectations and utilise their connectedness to other welfare providers to sustain life. As diversely situated, community-level, caring bureaucrats, they also assist their ‘cases’ to construct claims of vulnerability that fit the narrow categories of welfare organisations, recognising and addressing forms of vulnerability that go beyond such definitions from the outside. In such processes, the credibility of both welfare institutions and CCWs is challenged and reproduced.

Vaccination, conscientious objection and human rights

AbstractThis paper discusses the extent to which conscientious objections to vaccination qualify for protection under the European Convention on Human Rights (ECHR). Drawing on an examination of the nature of conscience and the ethics of vaccine refusal, it argues that a narrow category of reasons for refusal to be vaccinated can be differentiated from more general ‘vaccine hesitancy’. In relation to conscience objections of this kind, it engages in a systematic analysis of the applicability of the ECHR, both in relation to compulsory vaccination, and so-called ‘vaccine passports’. It concludes that states can – and in some situations must – recognise conscientious objections under the ECHR.

Improved TCT topology for shaded photovoltaic arrays

Photovoltaic energy is increasingly becoming a widespread technology and a viable alternative to fossil fuels for satisfying energy demands while mitigating pollution and climate change. However, various issues significantly affect the power production of photovoltaic systems, including partial shading effects, mainly under the basic interconnection schemes. Furthermore, the P–V curve exhibits multiple maxima, complicating the global maximum power point identification. This investigation aims to diminish the severity of partial shadowing by proposing a novel architecture allowing the inner parts of the photovoltaic panel to be involved in attached connections with the array subparts through a total-cross topology. The suggested photovoltaic reconfiguration validity is demonstrated using P–V curve analysis and performance indicators such as mismatch power loss, fill factor and global maximum power point. Moreover, adopting PSIM software to develop a photovoltaic model and, subsequently, a photovoltaic array to conduct simulations and acquire results. Finally, the suggested interconnection scheme has a significant power overrun exceeding 40W compared to the usual total cross-tied topology in certain shading modes, including the short and narrow categories. Furthermore, a small overshot of 5W disfavors the forced total cross-tied topology in short and wide shadowing scenarios.

Mirroring Society? Tracing the Logic of Diversity in the Canadian Journal of Higher Education

Diversity and equity have become central themes of institutional planning in Canadian post-secondary institutions. The complexity and variance of such activities, and their disconnect from individual experiences, are inherently related to the social norms established by the dominant cultural group. This article argues that published research articles play an important role in reflecting how organizational norms are understood and institutionalized. To trace the normative shifts in how diversity has been addressed in research articles, a systematic analysis of over 186 peer-reviewed articles published in the Canadian Journal of Higher Education between 1971 and 2020 was performed. The findings demonstrate that the concept of diversity has evolved from being examined in narrow binary categories of socio-economic, language, and gender diversity to a more recent focus on intersectionality. The shift from diversity being an issue of individual concern to diversity being a core institu-tional responsibility closely related to student learning is apparent. The article ends with recommendations for future areas of research with specific calls made to increased uptake of critical approaches to diversity for more nuanced perspectives of our accepted social norms in Canadian higher education.