bluuebunny/crossref_metadata_2025 huggingface dataset:
Do Labour Welfare Policies Matter for Workers? Evidence from the Garment Supply Chain Industry in Bangladesh
Authors: Syed Robayet Ferdous , Mahmud Kazi Tanvir , Karim Ridoan
Published: May 2024

The paper focusses on workers’ opinions in regard to welfare policies enacted under the Bangladesh Labour Act 2006. The study investigates two questions: Do labour welfare policies under labour law really matter for workers? If so, to what extent are such welfare policies practised in the global garment supply chain industry in Bangladesh? The Binary Logistic Regression technique has been used to assess the opinions of garment workers as to whether their level of satisfaction increases by workers’ welfare facility interventions. The data were collected from compliant and export-oriented factories between July 2021 and August 2021 in three Upazilas-Savar Ashulia (Dhaka District) and Gazipur Sadar (Gazipur District) in Bangladesh. This study demonstrates that overtime facilities, medical facilities, safety measures, restroom facilities, lunchroom facilities, and childcare facilities can play a pivotal role in increasing the satisfaction level of the workers. Given the similar socio-economic and geographical backgrounds, this research can be applied to the garment manufacturing industries of other South Asian countries. It serves as a valuable tool for understanding workers' attitudes and beliefs about welfare provisions. By applying the findings of this study, one can better comprehend the needs of the workers in terms of various labor welfare motivational tools.
Advancements in black titanium dioxide nanomaterials for solar cells: a comprehensive review
Authors: Selema T. C. , Malevu T. D. , Mhlongo M. R. , Motloung S. V. , Motaung T. E.
Published: May 2024

Over the past decade, black titanium dioxide (B-TiO2) has garnered considerable attention within the scientific community due to its exceptional properties in optoelectronic and photovoltaic applications. This review offers a thorough examination of the synthesis, characteristics, and utilization of B-TiO2 nanomaterials in solar cell technologies. It underscores the pivotal role played by B-TiO2 in bolstering light absorption, facilitating charge separation, and optimizing charge transport mechanisms within solar cell architectures. Notable research endeavors are highlighted, showcasing the strides made in enhancing solar cell efficiency through the incorporation of B-TiO2. Furthermore, this review delves into the challenges inherent in the utilization of B-TiO2, including considerations of stability, scalability, and manufacturing methodologies, thereby stressing the imperative for refined synthesis techniques. Environmental concerns related to B-TiO2 are also addressed, underscoring the significance of evaluating its ecological footprint and advocating for sustainable deployment practices. Moreover, the review elucidates the future prospects of B-TiO2 in solar energy conversion, emphasizing innovations in device design and novel applications while championing environmentally conscious utilization practices. Serving as a comprehensive resource, this review is poised to empower researchers and practitioners alike, fostering deeper insights and facilitating advancements in the realm of B-TiO2 nanomaterials within the domain of solar cells.
Findings on three endocommensal scuticociliates (Protista, Ciliophora) from freshwater mollusks, including their morphology and molecular phylogeny with descriptions of two new species
Authors: Li Tao , Zhang Tengyue , Liu Mingjian , Zhang Zhe , Zhang Jiachen , Niu Junhua , Chen Xiangrui , Al-Farraj Saleh A. , Song Weibo
Published: May 2024

Species of the ciliate genera Myxophyllum and Conchophthirus are found as endocommensals of terrestrial and freshwater mollusks, respectively. So far, there have been few studies of these genera and morphological data for most members are often incomplete. In the present work, two new species, Myxophyllum weishanense sp. nov. and Conchophthirus paracurtus sp. nov., and a known species, Conchophthirus lamellidens, were isolated from hosts in Lake Weishan Wetland, China. Taxonomic studies indicate that M. weishanense sp. nov. can be recognized mainly by the combination of about 60 somatic kineties on both ventral and dorsal sides and the presence of caudal cilia. Conchophthirus paracurtus sp. nov. differs from congeners in its body shape and size, having a glabrous area on the posterior right side, and having fewer somatic kineties. In addition, differences in their ITS2 (Internally Transcribed Spacer 2) secondary structures support the discrimination of the two new species from their highly similar congeners. An improved diagnosis for the poorly known species, C. lamellidens is also provided. Phylogenetic analyses reveal that members of the genus Myxophyllum belong to a fully supported clade that is sister to a large, poorly supported clade consisting of Hemispeiridae, Ancistridae, and several lineages of the nonmonophyletic Cyclidiidae. The Myxophyllum clade also includes Protophyra ovicola JQ956552, a possible misidentification. Sequences of the two new Conchophthirus species cluster with other congeners in a fully supported clade that is unrelated to either the ‘typical’ thigmotrichs or to pleuronematids, thus conflicting with the traditional classification, and may represent an orphan scuticociliate lineage.
AI art and public literacy: the miseducation of Ai-Da the robot
Authors: Lima Eleonora
Published: May 2024

This article examines the implications of the artworks and public performances of the robot artist Ai-Da. While the project claims to advance AI public literacy and foster critical debate around intelligent systems, it instead ends up perpetuating popular misunderstandings about AI creativity, agency, and consciousness. Built in 2019, Ai-Da is a humanoid robot capable of creating drawings, paintings, and composing poetry. However, the project often conceals or miscommunicates the technical aspects of Ai-Da’s capabilities in a manner that encourages the public to misattribute human-like traits to the robot. This lack of transparency in the presentation of Ai-Da’s abilities and the creative processes involved risks reinforcing existing misconceptions about AI, rather than promoting a more nuanced understanding. By employing discourse analysis and drawing on scholarship on machine and computational creativity, anthropomorphism in social robots, and posthuman embodiment, this article uses the Ai-Da project as a case study to illustrate how the dangers of AI hype can be obscured when presented through the lens of public art. The analysis examines how the Ai-Da project, despite its stated goals of advancing AI literacy, fails to effectively challenge and may even exacerbate public misperceptions about the nature of AI-generated art and creativity.
Creating sustainable and flexible architectural skin with microbial cellulose-based material: synthesis and mechanical characterization
Authors: Massoud Passaint , AbouSeada Nour , M.Saada Aya , Zolfakkar M.
Published: May 2024

Attaining sustainability by developing efficient architectural materials will be a suitable remedy for various environmental problems. Incorporating clean biotechnology, particularly Bacterial Cellulose (BC), into the field of Architecture Design offers a novel strategy with the objective of creating environmentally-friendly architectural materials. The key goal of this research is to investigate the synthesis of BC by cultivating kombucha SCOBY in a culture medium that has been supplemented with sugar and tea extract. The linear density, tensile strength and strain of the BC bio-film and BC composites were assessed in order to determine the material’s degree of fitness in potential applications. The tensile test showed that BC bio-film and its jute composite had tensile strengths of 5 MPa and 10 MPa respectively, indicating notable resilience and durability as a feasible substitute for conventional construction materials. The study delves deeper into the sustainability, biodegradability, and economic feasibility of BC, emphasising its potential as an independent foundational material. The incorporation of jute fibres into BC enhances its capabilities, resulting in the development of a novel composite material known as BC + jute. This composite exhibits superior mechanical and psychochemical characteristics, making it suitable for the creation of sophisticated architectural prototypes. The results of this research establish a strong foundation for the advancement of ecologically conscious architectural solutions, demonstrating the feasibility and capacity of BC in promoting sustainability within the construction sector.Keywords: Microbial Cellulose, Scopy, Architecture, Environmental-friendly, sustainability, interior design, jute fiber, biomaterials.
Medium-cumulative dose of cytarabine in consolidation therapy shows the greatest benefit in AML patients
Authors: Hao Yiping , Ji Min , Jin Shumin , Li Wei , Zhou Ying , Jia Ruinan , Li Wěi , Jiang Huihui , Wang Jingtao , Lu Fei , Zang Shaolei , Zhang Chunqing , Ye Jingjing , Ji Chunyan
Published: May 2024

Background

High-dose cytarabine (HDAC) is commonly used for consolidation therapy in young acute myeloid leukemia (AML) patients, but the dosage of cytarabine is still controversial in the clinic due to its obvious post-chemotherapy adverse effects. The aim of this study was to contrast the efficacy in different dose groups of cytarabine after consolidation therapy in Chinese AML patients.

Methods

AML patients treated with cytarabine consolidation at Qilu Hospital, Shandong University from January 2010 to September 2022 were retrospectively analyzed, from which 346 AML patients with relatively complete follow-up data were selected for this study. We compared the patients’ overall survival (OS) rate, relapse-free survival (RFS) rate, and hematologic adverse events in terms of their general characteristics, cytarabine consolidation therapy dose, consolidation course, 2022 European Leukemia Net (ELN) risk stratification, and transplantation.

Results

In AML patients under 60 years of age, the 5-year RFS rate with high-dose cytarabine consolidation therapy was superior to that of small-dose cytarabine (P = 0.024), while the 5-year RFS rate was comparable in the high-dose and intermediate-dose groups, and there was no obvious difference among the three groups in the 5-year OS rate (P > 0.05). OS and RFS of those given more than 3 courses of cytarabine consolidation therapy were better than those in the 1–2 courses group (P = 0.060, P = 0.040). OS and RFS were better in patients with cumulative dose of cytarabine ≥ 36g than in patients with cumulative dose < 36g (P < 0.05), but cumulative dose ≥ 54g was comparable in OS and RFS with ≥ 36–< 54g group (P > 0.05). There was no significant difference in hematologic adverse effects among the three treatment groups.

In the latest ELN risk stratification favorable-risk group, the cumulative dose of cytarabine ≥ 36g had a better 5-year RFS rate than the < 36g group (P = 0.038), and in the intermediate-risk group the 5-year OS rate and RFS rate were better in the ≥ 36g group than the < 36g group (P = 0.012, 0.025). In addition, the prognosis of transplanted patients was better than that of non-transplanted patients, whereas in non-transplanted patients, consolidation therapy with ≥ 36g cytarabine can effectively improve outcomes. Multivariate analysis indicated that age, fibrinogen (FIB) and the cumulative dose of cytarabine of ≥ 36–< 54g were predictors of OS, while age, white blood cell (WBC) and HDAC were predictors of RFS.

Conclusion

The results of the study showed that consolidation therapy with cytarabine up to a cumulative dose of ≥ 36–< 54g in AML patients who did not undergo transplantation significantly improved patient prognosis. In the latest ELN risk stratification, cumulative doses of cytarabine ≥ 36g had a better prognosis in favorable and intermediate-risk patients.
Optimization and production of dairy-cereal grain-based probiotic beverage powder and its probiotic survivability under simulated gastric and pancreatic conditions
Authors: Meena Kamalesh Kumar , Taneja Neetu Kumra , Jain Devendra , Ojha Ankur
Published: May 2024

The present study uses maize flour and skimmed milk powder to develop a probiotic dairy-cereal-based food powder by spray drying and using response surface methodology for optimization. The processing parameters and ingredients, including inlet spray drying temperature (140–170 ℃), maize flour (80–120 g), and skim milk powder (60–80 g), were optimized against probiotic survivability count, moisture, sensory score, bulk density, and wettability as responses using response surface methodology. The optimum experimental conditions obtained to manufacture acceptable-quality powder were an inlet temperature of 151 ℃, an amount of maize flour of 102.74 g, and skim milk powder at 69.88 g. The probiotic survivability (8.35 log CFU/g) was observed at more than the recommended level (6.0 log CFU/g) due to the probiotic strain's microencapsulation by skim milk and maize flour components. The optimized powder had good nutritional and functional values and was observed to have acceptable water activity, surface structure, and color values. The shelf life of the product on the basis of probiotic survival (minimum 6.0 log CFU/g) was found to be 49 days at 4 ℃. Gastric and pancreatic survival was also observed at more than 50% in refrigerated conditions for up to 56 days of storage.
Combined Color-Doppler Flow and Angio Planewave UltraSensitive™ Imaging for Analysis of Hemodynamic Characteristics of Normal Upper Limb Arteries
Authors: Liu Yanzhou , Zhang Xiyue , Yang Hang , Tan Xueyan , Huang Duo , Yuan Hongmei , Yu Lili , Yang Fang , Zou Yuan , He Xiuli , Luo Yuqun , Cui Fangzhao , Wang Ping , Li Zukun , Zhang Qing , Zhang Ning , Jiang Binglei , Yue Wensheng
Published: May 2024

Background

To evaluate the hemodynamic characteristics of normal upper extremity arteries from the brachial artery to the fingertip arterioles.

Methods

We analyzed the characteristics and changes in the regularities of ultrasonic parameters in the upper extremity arteries of 104 healthy volunteers using color Doppler flow imaging and Angio Planewave UltraSensitive™ imaging. The measured ultrasonic parameters included the vessel diameter, blood-flow spectrum waveform, peak systolic velocity, end-diastolic velocity, resistance index, pulsatility index, ratio of PSV to EDV, blood-flow volume, along with systolic acceleration of each BA, radial artery, superficial palmar arch artery, palmar proper digital artery, and third-grade artery arch of the fingernail bed.

Results

From BA to FN3AA, the diameter, PSV, RI, S/D, VFlow, and slope of the artery significantly decreased (P < 0.001), and size of the parameters significantly correlated with the anatomic position of the arteries. The blood-flow spectrum gradually changed from various waveforms to fixed monophasic waves. There was a linear relationship between the distribution of monophasic waveforms and arterial groups (R = -0.453; P < 0.001). When the blood-flow spectrum of BA and RA showed a monophasic waveform, their branch arteries showed the same. The waveforms of PPDA and FN3AA were also monophasic.

Conclusion

Regular changes in the blood-flow spectrum waveform and hemodynamic parameters are related to the anatomic position of the upper limb arteries. CDFI combined with Angio PLUS accurately and systematically evaluates the hemodynamic characteristics of the upper extremity arteries.
RETRACTED ARTICLE: Surprisingly low results from studies on cognitive ability in developing countries: are the results credible?
Authors: Rindermann Heiner
Published: May 2024

Developing countries achieve surprisingly weak results in international cognitive competence studies. The results are about one to two standard deviations below the average norm-values obtained in Western countries. The results are so low that they are sometimes difficult to believe. For example, in the World Bank collection, Nigeria scored 262 student assessment points (SASQ, about two and a half standard deviations below the norm 500, equivalent in the IQ-scale to 64 points); in the Lim et al. collection, Yemen scored 336 SASQ (equivalent to IQ 75). These results have triggered opposition, factual-scientific criticism, but also ethical debates and political-ideological objections. We crosscheck the values here by comparing different sources of information, statistical analysis, and on-site reports. Results of the different test paradigms seem to be similar for country groups. However, there are sometimes major differences for individual countries. The same is true for comparing different test collections: results of grouped countries are similar, but single countries differ. Using education, GDP per capita and politics to predict test scores shows somewhat higher results for the Global South (5 IQ points), especially for Latin America (rising from 78 to 86 points in an IQ metric). Finally, observational studies of schools and every day life in several countries of the Global South point to problems in the scope and quality of instruction as well as of thinking. To improve outcomes and competences, it is recommended to expand education (e.g., kindergarten, extension of schooling) and better train teachers. Where there are large discrepancies between predictions and test results, the potential seems to be large.
Failure of adhesive bonding unveiled by in-situ strain testing by high-resolution scanning transmission electron microscopy
Authors: Horiuchi Shin , Saito Noriyuki , Hanada Takeshi , Shimamoto Kazumasa , Akiyama Haruhisa
Published: May 2024

The nano-scale failure behaviors of adhesive interfaces were investigated through in-situ straining testing to observe real-time crack propagations under a scanning transmission electron microscope (STEM). Two different loading modes were applied to thin sections of adhesive interfaces: crack-opening mode applied to pre-cracks made at the interface and shear mode. The failure of aluminum alloy (Al6061) and a second-generation acrylic adhesive (SGA) was examined, enabling observation of the growth of crazing in the adhesive layer, which has a phase-separated structure, preceding the macroscopic failure of the interfaces. Furthermore, the failure of a direct joint of thermoplastic and Al was investigated, with a comparison made to that observed in the adhesive interface. The generation and propagation of cracks near the interface, attributed to the adhesive's phase separation, contribute to the toughness of the adhesive interface. Both the direction of stress acting on the interface and the interface's strength influence the initiation and growth of cracks throughout the adhesive layer.
Emergency remote teaching amid global distress: how did teacher educators respond, cope, and plan for recovery?
Authors: Gyamerah Kenneth , Asamoah Daniel , Baidoo-Anu David , Quainoo Eric Atta , Amoateng Ernest Yaw , Sasu Ernest Ofori
Published: May 2024

This study explored the emergency remote teaching experiences of Ghanaian teacher educators during COVID-19. The study employed a basic qualitative interpretive approach and purposively interviewed 25 teacher educators from 15 teacher training institutions. Teacher educators in this study reported that emergency remote teaching (ERT) was a learning opportunity and professional capacity-building experience for them to engage in contemporary pedagogical practices. Teachers also indicated that synchronous and asynchronous remote teaching was helpful for their students, as it provided students with the opportunity to engage in self-paced learning due to their access to learning resources at any time. ERT promoted peer teaching, team teaching, and effective collaboration among teacher educators. However, with little preparation and training for remote teaching and learning, both teachers and students struggled with the remote teaching and learning process. A myriad of challenges were identified including the unsuitability and unfamiliarity of online teaching and learning platforms, a high rate of absenteeism and low student engagement, a lack of parental and school support, and inadequate technological resources. The study revealed that mathematics and science teachers needed advanced technological resources to support student learning. Implications for educational policy and practice are discussed.
Different effects of polyethylene microplastics on bioaccumulation of three fungicides in maize (Zea mays L.)
Authors: Qiu Shuimin , Shen Hongjian , Song Jialu , Fang Hua , Yu Yunlong , Zhang Luqing
Published: May 2024

Despite the ubiquity of microplastics (MPs) and pesticides in agricultural soils, the effects of MPs on the behavior and bioavailability of pesticides in soil–plant systems remain largely unknown. This study comparatively investigated the adsorption and dissipation of three commonly used fungicides (metalaxyl, azoxystrobin and tebuconazole) in soil as well as their accumulation and distribution in maize Zea mays L. with and without the amendment of polyethylene MPs (PE-MPs). The results showed that the adsorption of the fungicides to both MPs and soil was strongly dependent on their octanol/water partition coefficients (logKow). The addition of 5% PE-MPs significantly increased the adsorption of the hydrophobic fungicides azoxystrobin and tebuconazole to soil due to their greater adsorption affinity to PE-MPs than to soil, while the effect was negligible in the case of the hydrophilic fungicide metalaxyl. The enhanced adsorption of azoxystrobin and tebuconazole to soil with the amendment of PE-MPs decreased their bioavailable fractions in soil, especially the concentration in in situ pore water, resulting in prolonged persistence in soil and reduced accumulation in maize plants. PE-MPs caused a greater reduction in the dissipation and bioaccumulation of tebuconazole than azoxystrobin, presumably because PE-MPs were more effective in promoting the adsorption of tebuconazole (with a higher logKow) in soil. Comparatively, PE-MPs had little effect on the dissipation and bioaccumulation of metalaxyl since its bioavailability was almost unaffected. Our work provides effective information for the risk assessment of co-contamination of MPs and pesticides.
The Philosophy of Symmetry
Authors: Yii Wye Teh Nicholas Joshua
Published: May 2024

This Element is a concise, high-level introduction to the philosophy of physical symmetry. It begins with the notion of 'physical representation' (the kind of empirical representation of nature that we effect in doing physics), and then lays out the historically and conceptually central case of physical symmetry that frequently falls under the rubric of 'the Relativity Principle,' or 'Galileo's Ship.' This material is then used as a point of departure to explore the key hermeneutic challenge concerning physical symmetry in the past century, namely understanding the physical significance of the notion of 'local' gauge symmetry. The approach taken stresses both the continuity with historically important themes such as the Relativity Principle, as well as novel insights earned by working with contemporary representational media such as the covariant phase space formalism.
Sociocultural Theory and Second Language Developmental Education
Authors: Poehner Matthew E. , Lantolf James P.
Published: May 2024

Sociocultural Theory (SCT), as formulated by Russian psychologist L. S. Vygotsky nearly a century ago, is distinct among traditions in the field of second language (L2) studies in its commitment to praxis. According to this view, theory and research provide the orienting basis for practice, which in turn serves as a testing ground for theory (Vygotsky, 1997). This Element offers a synthesis of foundational concepts and principles of SCT and an overview of two important areas of praxis in L2 education: Concept-Based Language Instruction, which organizes language curricula around linguistic concepts, and Dynamic Assessment, a framework that integrates teaching and diagnosing learner L2 abilities. Leading approaches to L2 teacher education informed by SCT are also discussed. Examples from studies with L2 teachers and learners showcase praxis in action, and emerging questions and directions are considered.
The Weather Observer's Handbook
Authors: Burt Stephen
Published: May 2024

This handbook provides a comprehensive, practical, and independent guide to all aspects of making weather observations. The second edition has been fully updated throughout with new material, new instruments and technologies, and the latest reference and research materials. Traditional and modern weather instruments are covered, including how best to choose and to site a weather station, how to get the best out of your equipment, how to store and analyse your records and how to share your observations. The book's emphasis is on modern electronic instruments and automatic weather stations. It provides advice on replacing 'traditional' mercury-based thermometers and barometers with modern digital sensors, following implementation of the UN Minamata Convention outlawing mercury in the environment. The Weather Observer's Handbook will again prove to be an invaluable resource for both amateur observers choosing their first weather instruments and professional observers looking for a comprehensive and up-to-date guide.
Soldiers, Wages, and the Hellenistic Economies
Authors: Van Regenmortel Charlotte
Published: May 2024

This book explains the military and economic developments that engulfed the ancient Mediterranean in the late Classical and early Hellenistic periods from the perspective of labour history. It examines the changing nature of military service in the vast armies of Philip and Alexander, the Successors, and the early Hellenistic kingdoms and argues that the paid soldiers who staffed them were not just 'mercenaries', but rather the Greek world's first large-scale instance of wage labour. Using a wide range of sources, Charlotte Van Regenmortel not only offers a detailed social history of military service in these armies but also provides a novel explanation for the economic transformation of the Hellenistic age, positioning military wage-labourers as the driving force behind the period's nascent market economies. This title is part of the Flip it Open Programme and may also be available Open Access. Check our website Cambridge Core for details.
A data science approach to climate change risk assessment applied to pluvial flood occurrences for the United States and Canada
Authors: Bourget Mathilde , Boudreault Mathieu , Carozza David A. , Boudreault Jérémie , Raymond Sébastien
Published: May 2024

There is mounting pressure on (re)insurers to quantify the impacts of climate change, notably on the frequency and severity of claims due to weather events such as flooding. This is however a very challenging task for (re)insurers as it requires modeling at the scale of a portfolio and at a high enough spatial resolution to incorporate local climate change effects. In this paper, we introduce a data science approach to climate change risk assessment of pluvial flooding for insurance portfolios over Canada and the United States (US). The underlying flood occurrence model quantifies the financial impacts of short-term (12–48 h) precipitation dynamics over the present (2010–2030) and future climate (2040–2060) by leveraging statistical/machine learning and regional climate models. The flood occurrence model is designed for applications that do not require street-level precision as is often the case for scenario and trend analyses. It is applied at the full scale of Canada and the US over 10–25 km grids. Our analyses show that climate change and urbanization will typically increase losses over Canada and the US, while impacts are strongly heterogeneous from one state or province to another, or even within a territory. Portfolio applications highlight the importance for a (re)insurer to differentiate between future changes in hazard and exposure, as the latter may magnify or attenuate the impacts of climate change on losses.
Oral History and the Textual Archive: Contemporary Pakistani Shi‘i ‘Ulama’s Recollections and Reflections on Politics and Sectarian Harmony
Authors: Saif Mashal
Published: May 2024

Recent scholarship on Pakistani Shi‘ism draws on a historical archive that it primarily textual: books, journal articles, pamphlets, etc. authored by Shi‘i ‘ulama and notables. However, as the field of oral history rightly asserts, the textual archive can never capture those historical facts that are only accessible through oral sources. This article at times challenges and at other points supplements and reinforces the textual archive through the creation of a new archive: an oral history archive based on multiple interviews with two leading Shi‘i ‘ulama in contemporary Pakistan. At the heart of these interviews lies the question of how these ‘ulama conceptualize and remember their country’s political past and assess their present, considering their minority status and sectarianism. Through undertaking the above-mentioned examination, this article inaugurates the use of oral history as central to scholarship on Shi‘i ‘ulama and underscores the importance of the study of this overlooked primary source.
Assessing associations between individual-level social determinants of health and COVID-19 hospitalizations: Investigating racial/ethnic disparities among people living with human immunodeficiency virus (HIV) in the U.S. National COVID Cohort Collaborative (N3C)
Authors: Vaidya Dimple , Wilkins Kenneth J. , Hurwitz Eric , Islam Jessica Y. , Li Dongmei , Sun Jing , Safo Sandra E. , Ross Jennifer M. , Hassan Shukri , Hill Elaine , Nosyk Bohdan , Varley Cara D. , Fadul Nada , Camacho-Rivera Marlene , Madlock-Brown Charisse , Patel Rena C.
Published: May 2024

Background:

Leveraging the National COVID-19 Cohort Collaborative (N3C), a nationally sampled electronic health records repository, we explored associations between individual-level social determinants of health (SDoH) and COVID-19-related hospitalizations among racialized minority people with human immunodeficiency virus (HIV) (PWH), who have been historically adversely affected by SDoH.

Methods:

We retrospectively studied PWH and people without HIV (PWoH) using N3C data from January 2020 to November 2023. We evaluated SDoH variables across three domains in the Healthy People 2030 framework: (1) healthcare access, (2) economic stability, and (3) social cohesion with our primary outcome, COVID-19-related hospitalization. We conducted hierarchically nested additive and adjusted mixed-effects logistic regression models, stratifying by HIV status and race/ethnicity groups, accounting for age, sex, comorbidities, and data partners.

Results:

Our analytic sample included 280,441 individuals from 24 data partner sites, where 3,291 (1.17%) were PWH, with racialized minority PWH having higher proportions of adverse SDoH exposures than racialized minority PWoH. COVID-19-related hospitalizations occurred in 11.23% of all individuals (9.17% among PWH, 11.26% among PWoH). In our initial additive modeling, we observed that all three SDoH domains were significantly associated with hospitalizations, even with progressive adjustments (adjusted odds ratios [aOR] range 1.36–1.97). Subsequently, our HIV-stratified analyses indicated economic instability was associated with hospitalization in both PWH and PWoH (aOR range 1.35–1.48). Lastly, our fully adjusted, race/ethnicity-stratified analysis, indicated access to healthcare issues was associated with hospitalization across various racialized groups (aOR range 1.36–2.00).

Conclusion:

Our study underscores the importance of assessing individual-level SDoH variables to unravel the complex interplay of these factors for racialized minority groups.
The Niu–Li Factional Strife: The Origins of a Historiographical Fiction
Authors: Höckelmann Michael
Published: May 2024

The “Niu–Li Factional Strife,” named after Niu Sengru (779–847) and Li Deyu (787–850), is an enduring theme in Tang history. Based on accounts of personal animosity, a narrative evolved in which Niu and Li have become the ringleaders of two factions that drew in almost all high-profile literati of the ninth century. This article revises traditional and modern narratives of the Strife by first showing that the scattered and contradictory evidence in the earliest sources does not bear out the model of a decades-long struggle between two factions. Second, it demonstrates how “Niu and Li” first arose as an emblem of Tang weakness and a rallying cry for unity within the bureaucracy under the Northern Song two centuries later. Finally, it shows how modern historians picked up the loose ends and remoulded them into a struggle between different classes against the backdrop of factious politics in Republican China.
Turbulent drag reduction with streamwise-travelling waves in the compressible regime
Authors: Gattere Federica , Zanolini Massimo , Gatti Davide , Bernardini Matteo , Quadrio Maurizio
Published: May 2024

The ability of streamwise-travelling waves of spanwise velocity to reduce the turbulent skin-friction drag is assessed in the compressible regime. Direct numerical simulations are carried out to compare drag reduction in subsonic, transonic and supersonic channel flows. Compressibility improves the benefits of the travelling waves, in a way that depends on the control parameters: drag reduction becomes larger than the incompressible one for small frequencies and wavenumbers. However, the improvement depends on the specific procedure employed for comparison. When the Mach number is varied and, at the same time, wall friction is changed by the control, the bulk temperature in the flow can either evolve freely in time until the aerodynamic heating balances the heat flux at the walls, or be constrained such that a fixed percentage of kinetic energy is transformed into thermal energy. Physical arguments suggest that, in the present context, the latter approach should be preferred. This provides a test condition in which the wall-normal temperature profile more realistically mimics that in an external flow, and also leads to a much better scaling of the results, over both the Mach number and the control parameters. Under this comparison, drag reduction is only marginally improved by compressibility.
Evidence of quasiequilibrium in pressure-gradient turbulent boundary layers
Authors: Baxerres Victor , Vinuesa Ricardo , Nagib Hassan
Published: May 2024

Two sets of measurements utilizing hot-wire anemometry and oil-film interferometry for flat-plate turbulent boundary layers, exposed to various controlled adverse and favourable pressure gradients, are used to evaluate history effects of the imposed and varying free-stream gradients. The results are from the NDF wind tunnel at Illinois Tech (IIT) and the MTL wind tunnel at KTH, over the range

$800 < Re_\tau < 22\,000$

(where

$Re_{\tau }$

is the friction Reynolds number). The streamwise pressure-gradient parameter

$\beta \equiv (-\ell /\tau _{w}) \cdot (\partial P_{e}/\partial x)$

varied between

$-2 < \beta < 7$

, where

$\ell$

is an outer length scale for boundary layers equivalent to the half-height of channel flow and the radius of pipe flow, and is estimated for each boundary-layer profile; note that

$\tau_w$

is the wall-shear stress and

$P_e$

is the free-stream static pressure. Extracting from each profile the three parameters of the overlap region, following the recent work of Monkewitz & Nagib (J. Fluid Mech., vol. 967, 2023, p. A15) that led to an overlap region of combined logarithmic and linear parts, we find minimum history effects in the overlap region. Thus, the overlap region in this range of pressure-gradient boundary layers appears to be in ‘quasiequilibrium’.
Who is responsible for the residual risk and how can it be shared or transferred to optimize post-mine outcomes?
Authors: Maybee Bryan , Boggs Guy , Stevens Rob , Scrase Antonia
Published: May 2024

Over the life of a mining project, infrastructure is built, and mining activities alter the landscape. These activities create risks that may remain even with the implementation of rehabilitation and control measures during and after mining (Measham et al., 2024). The goal for many mining operations is to relinquish the site to a clearly defined next landowner or manager who will take over responsibility for the site, including any known or unknown residual risks and liabilities (IGF, 2023).
Fluid and kinetic studies of tokamak disruptions using Bayesian optimization
Authors: Ekmark I. , Hoppe M. , Fülöp T. , Jansson P. , Antonsson L. , Vallhagen O. , Pusztai I.
Published: May 2024

When simulating runaway electron dynamics in tokamak disruptions, fluid models with lower numerical cost are often preferred to more accurate kinetic models. The aim of this work is to compare fluid and kinetic simulations of a large variety of different disruption scenarios in ITER. We consider both non-activated and activated scenarios; for the latter, we derive and implement kinetic sources for the Compton scattering and tritium beta decay runaway electron generation mechanisms in our simulation toolDream(Hoppeet al.,Comput. Phys. Commun., vol. 268, 2021, 108098). To achieve a diverse set of disruption scenarios, Bayesian optimization is used to explore a range of massive material injection densities for deuterium and neon. The cost function is designed to distinguish between successful and unsuccessful disruption mitigation based on the runaway current, current quench time and transported fraction of the heat loss. In the non-activated scenarios, we find that fluid and kinetic disruption simulations can have significantly different runaway electron dynamics, due to an overestimation of the runaway seed by the fluid model. The primary cause of this is that the fluid hot-tail generation model neglects superthermal electron transport losses during the thermal quench. In the activated scenarios, the fluid and kinetic models give similar predictions, which can be explained by the significant influence of the activated sources on the runaway dynamics and the seed.
Co-phylogeographic structure in a disease-causing parasite and its oyster host
Authors: Weatherup Elizabeth Faye , Carnegie Ryan , Strand Allan E. , Sotka Erik E.
Published: May 2024

With the increasing affordability of next-generation sequencing technologies, genotype-by-sequencing has become a cost-effective tool for ecologists and conservation biologists to describe a species' evolutionary history. For host–parasite interactions, genotype-by-sequencing can allow the simultaneous examination of host and parasite genomes and can yield insight into co-evolutionary processes. The eastern oyster, Crassostrea virginica, is among the most important aquacultured species in the United States. Natural and farmed oyster populations can be heavily impacted by ‘dermo’ disease caused by an alveolate protist, Perkinsus marinus. Here, we used restricted site-associated DNA sequencing (RADseq) to simultaneously examine spatial population genetic structure of host and parasite. We analysed 393 single-nucleotide polymorphisms (SNPs) for P. marinus and 52,100 SNPs for C. virginica from 36 individual oysters from the Gulf of Mexico (GOM) and mid-Atlantic coastline. All analyses revealed statistically significant genetic differentiation between the GOM and mid-Atlantic coast populations for both C. virginica and P. marinus, and genetic divergence between Chesapeake Bay and the outer coast of Virginia for C. virginica, but not for P. marinus. A co-phylogenetic analysis confirmed significant coupled evolutionary change between host and parasite across large spatial scales. The strong genetic divergence between marine basins raises the possibility that oysters from either basin would not be well adapted to parasite genotypes and phenotypes from the other, which would argue for caution with regard to both oyster and parasite transfers between the Atlantic and GOM regions. More broadly, our results demonstrate the potential of RADseq to describe spatial patterns of genetic divergence consistent with coupled evolution.
Expanding on expansus: a new species of Scaphanocephalus from North America and the Caribbean based on molecular and morphological data
Authors: Locke Sean A. , Calhoun Dana M. , Valencia Cruz José M. , Ebbs Erika T. , Díaz Pernett Sandra C. , Tkach Vasyl V. , Kinsella John M. , Freeman Mark A. , Blanar Christopher A. , Johnson Pieter T. J.
Published: May 2024

Members of the genus Scaphanocephalus mature in accipitrids, particularly osprey, Pandion haliaetus, with metacercaria causing Black Spot Syndrome in reef fishes. In most of the world, only the type species, Scaphanocephalus expansus (Creplin, 1842) has been reported. Recent molecular studies in the Western Atlantic, Mediterranean and Persian Gulf reveal multiple species of Scaphanocephalus, but have relied on 28S rDNA, mainly from metacercariae, which limits both morphological identification and resolution of closely related species. Here we combine nuclear rDNA with mitochondrial sequences from adult worms collected in osprey across North America and the Caribbean to describe species and elucidate life cycles in Scaphanocephalus. A new species described herein can be distinguished from S. expansus based on overall body shape and size. Phylogenetic analysis of the whole mitochondrial genome of Scaphanocephalus indicates a close relationship with Cryptocotyle. We conclude that at least 3 species of Scaphanocephalus are present in the Americas and 2 others are in the Old World. Specimens in the Americas have similar or identical 28S to those in the Mediterranean and Persian Gulf, but amphi-Atlantic species are unlikely in light of divergence in cytochrome c oxidase I and the lack of amphi-Atlantic avian and fish hosts. Our results provide insight into the geographic distribution and taxonomy of a little-studied trematode recently linked to an emerging pathology in ecologically important reef fishes.
Creativity is motivated by novelty. Curiosity is triggered by uncertainty
Authors: Singh Aditya , Murayama Kou
Published: May 2024

Although creativity and curiosity can be similarly construed as knowledge-building processes, their underlying motivation is fundamentally different. Specifically, curiosity drives organisms to seek information that reduces uncertainty so that they can make a better prediction about the world. On the contrary, creative processes aim to connect distant pieces of information, maximizing novelty and utility.
Expanding horizons in reinforcement learning for curious exploration and creative planning
Authors: Zhou Dale , Bornstein Aaron M.
Published: May 2024

Curiosity and creativity are expressions of the trade-off between leveraging that with which we are familiar or seeking out novelty. Through the computational lens of reinforcement learning, we describe how formulating the value of information seeking and generation via their complementary effects on planning horizons formally captures a range of solutions to striking this balance.
A developmental account of curiosity and creativity
Authors: Vaisarova Julie , Lucca Kelsey
Published: May 2024

Ivancovsky et al.'s Novelty-Seeking Model suggests several mechanisms that might underlie developmental change in creativity and curiosity. We discuss how these implications both do and do not align with extant developmental findings, suggest two further elements that can provide a more complete developmental account, and discuss current methodological barriers to formulating an integrated developmental model of curiosity and creativity.
Distinct neurocognitive pathways underlying creativity: An integrative approach
Authors: Baas Matthijs , Stevenson Claire E. , Perchtold-Stefan Corinna , Nijstad Bernard A. , De Dreu Carsten K. W.
Published: May 2024

By examining the shared neuro-cognitive correlates of curiosity and creativity, we better understand the brain basis of creativity. However, by only examining shared components, important neuro-cognitive correlates are overlooked. Here, we argue that any comprehensive brain model of creativity should consider multiple cognitive processes and, alongside the interplay between brain networks, also the neurochemistry and neural oscillations that underly creativity.
Question-asking as a mechanism of information seeking
Authors: Raz Tuval , Kenett Yoed N.
Published: May 2024

Ivancovsky et al. explore the relationship between curiosity and creativity, by suggesting they align through novelty-seeking mechanisms. We argue that a general mechanism linking both capacities together is question-asking: Curiosity drives question-asking that leads to creative problem solving. Yet, current findings from our lab suggest that question complexity relates to creativity, but not necessarily to curiosity, warranting further investigation.
A shared “optimal-level of arousal”: Seeking basis for creativity and curiosity
Authors: Gustafsson Erik , Ibáñez de Aldecoa Paula , Burdett Emily R R
Published: May 2024

We argue that the phases identified in the novelty-seeking model can be clarified by considering an updated version of the optimal-level of arousal model, which incorporates the “arousal” and “mood changing” potentials of stimuli and contexts. Such a model provides valuable insights into what determines one's state of mind, inter-individual differences, and the rewarding effects of curiosity and creativity.
Household transmission of human metapneumovirus and seasonal coronavirus
Authors: Bell Cristalyne , He Cecilia , Norton Derek , Goss Maureen , Chen Guanhua , Temte Jonathan
Published: May 2024

We analyzed data from a community-based acute respiratory illness study involving K-12 students and their families in southcentral Wisconsin and assessed household transmission of two common seasonal respiratory viruses – human metapneumovirus (HMPV) and human coronaviruses OC43 and HKU1 (HCOV). We found secondary infection rates of 12.2% (95% CI: 8.1%–17.4%) and 19.2% (95% CI: 13.8%–25.7%) for HMPV and HCOV, respectively. We performed individual- and family-level regression models and found that HMPV transmission was positively associated age of the index case (individual model: p = .016; family model: p = .004) and HCOV transmission was positively associated with household density (family model: p = .048). We also found that the age of the non-index case was negatively associated with transmission of both HMPV (individual model: p = .049) and HCOV (individual model: p = .041), but we attributed this to selection bias from the original study design. Understanding household transmission of common respiratory viruses like HMPV and HCOV may help to broaden our understanding of the overall disease burden and establish methods to prevent the spread of disease from low- to high-risk populations.
Codes of Conduct at Political Science Conferences: Prevalence and Content
Authors: Lu Lucie , Webb Williams Nora
Published: May 2024

Academic conferences are important institutions for promoting new research and facilitating conversations about the field. As a venue for knowledge exchange, professional development, and networking, conferences ideally promote positive environments that make scholars from underrepresented groups feel welcome. Yet, negative experiences at conferences are well documented. Codes of conduct have been promoted as tools to reduce harassment and discrimination. This article examines the prevalence and content of codes at US-based political science conferences and workshops. More specifically, we analyze whether and how codes address issues of sexual misconduct and identity-based discrimination. We find that 19% of 177 surveyed conferences have a code of conduct. Conferences that are older and larger are more likely to have codes, as are conferences that are run by organizations with permanent staff and relevant committees. We argue that effective conference codes must contain definitions, reporting channels, and enforcement procedures. Many of the analyzed codes did not explicitly define prohibited behaviors, specify mechanisms to report code violations, or describe consequences for misconduct.