bluuebunny/crossref_metadata_2025 huggingface dataset:
Within-Person Effects of Executive Functioning on Anxiety and Depressive Symptoms in Youth with Neurodevelopmental Disorders: A Longitudinal Study
Authors: Orm Stian , Wood Jeffrey , Fossum Ingrid Nesdal , Andersen Per Normann , Fjermestad Krister , Øie Merete Glenne , Skogli Erik Winther
Published: October 2024

Objectives

The objective was to disentangle the role of between- and within-person variation in executive functioning (EF) in the development of anxiety and depressive symptoms among youth with neurodevelopmental disorders.

Methods

We assessed 85 youth with ADHD, 38 youth with autism spectrum disorder (ASD), and 50 typically developing (TD) youth at baseline (Mage = 11.7 years, 64% males), 2-year follow-up, and 10-year follow-up with neuropsychological tests of EF and anxiety and depressive symptoms scales.

Results

Across groups, depressive symptoms increased with age, whereas anxiety symptoms were stable. Greater within-person improvement in overall EF from baseline to 2-year follow-up predicted reduced anxiety symptoms. Greater within-person improvement in cognitive flexibility predicted reduced depressive symptoms from baseline to 2-year follow-up.

Conclusions

We conclude that improvement in EF skills in youth may lessen the severity of anxiety and depressive symptoms over time. Thus, EF could be an intervention target to prevent anxiety and depressive symptoms.
A review of dye effluents polluting African surface water: sources, impacts, physicochemical properties, and treatment methods
Authors: Kapanga Pachris Muamba , Nyakairu George William Atwoki , Nkanga Christian Isalomboto , Lusamba Séraphin Ntumba , Tshimanga Raphael Muamba , Shehu Zaccheus
Published: October 2024

This review investigates the pervasive issue of dye effluent pollution in African surface waters, focusing on its significant adverse effects on both human health and environmental quality. Drawing from 63 articles published between 2004 and 2022, the review includes studies from Northern, Western, Eastern, Central, and Southern Africa, illustrating the widespread nature of dye contamination across the continent. Five primary sources of dye effluents are identified: textiles, food industries, dye producers, artisan dyes, and tannery-paint industries, all of which contribute substantially to the degradation of water quality. The physicochemical properties of dye effluents show high toxicity levels in surface waters, with significant regional variations. These variations highlight the importance of considering the specific characteristics of dye types and processing chemicals to fully understand the contamination levels. In evaluating treatment methods, the review finds that adsorption, coagulation/flocculation, filtration, and advanced oxidation processes (AOPs) such as photocatalysis, photo-Fenton oxidation, and plasma-chemical treatment are effective in mitigating dye pollution. The application of these methods varies across different African regions, indicating the need for region-specific approaches based on local conditions and available resources. The review also examines the impact of dye effluents on aquatic ecosystems and human health, with risk assessments revealing effects ranging from acute to chronic. This demonstrates the urgent need for targeted interventions to address dye effluent pollution in African surface waters, thereby protecting both environmental and public health.

Graphical Abstract
National Interests as Positive Externalities: Headquarters Retainment as Justification for Hybrid State-owned Enterprises in Norway (2000–2021)
Authors: Innset Ola
Published: October 2024

As a result of the partial privatization and public listing of two large state-owned enterprises in 2001, the Norwegian state became the largest owner at the Oslo stock exchange. A new mode of corporate governance was developed, through which retainment of the corporate headquarters (HQ) of hybrid state-owned enterprises became the sole political goal of continued state ownership in these corporations. This article explores the perceived benefits to the national economy of these company HQ through an investigation of public documents and interviews with key stakeholders. The article argues that the main function of the goal of HQ retainment was to portray national interests and political goals as mere (positive) externalities of HQ location, and that this goal was formalized due to a perceived need to depoliticize the corporate governance of hybrid state-owned enterprises.
Interventions for improving adherence to psychological treatments for common mental disorders: a systematic review
Authors: Biswal Bijayalaxmi , Gandhi Yashi , Singla Daisy R. , Velleman Richard , Zhou Brian , Fernandes Luanna , Patel Vikram , Prina Matthew , Sequeira Miriam , Garg Ankur , Bhatia Urvita , Nadkarni Abhijit
Published: October 2024

Our systematic review aims to synthesise the evidence on interventions targeting improvement in patient adherence to psychological treatments for common mental disorders. A search was conducted on six electronic databases using search terms under the following concepts: common mental disorders, adherence, psychological treatments and controlled trial study design. Due to the heterogeneity in intervention content and outcomes evaluated in the included studies, a narrative synthesis was conducted. Risk of bias was assessed using the Cochrane Risk of Bias Version 2 tool for randomised controlled trials and the Cochrane ROBINS-I tool for non-randomised controlled trials. The search yielded 23 distinct studies with a total sample size of 2,779 participants. All studies were conducted in high-income or upper-middle-income countries. Interventions to improve patient adherence to psychological treatments included reminders and between-session engagement (e.g., text messages), motivational interviewing, therapy orientation (e.g., expectation-setting) and overcoming structural barriers (e.g., case management). Interventions from 18 out of 23 studies were successful in improving at least one primary adherence outcome of interest (e.g., session attendance). Some studies also reported an improvement in secondary outcomes – six studies reported an improvement in at least one clinical outcome (e.g., depression), and three studies reported improvements in at least one measure of well-being or disability (e.g., days spent in in-patient treatment). By incorporating these interventions into psychological treatment services, therapists can better engage with and support their patients, potentially leading to improved mental health outcomes and overall well-being.
Equilibrium of fluid fluxes in the wake of a three-dimensional flat-back bluff body
Authors: Khan T.I. , Pastur L. , Cadot O. , Parezanović V.
Published: October 2024

The turbulent wake behind a flat-back Ahmed body is investigated using stacked stereoscopic particle image velocimetry. The wake is disturbed by a steady jet from the centre of the base and the effects are quantified for key blowing rates. The unactuated wake exhibits bistable dynamics in the horizontal plane that are completely subdued for the optimal blowing case, yielding a base drag reduction of 9 %. The three-dimensional mean wake is reconstructed and used to evaluate the wake mass fluxes whose equilibrium determines the recirculation length. The results for the unactuated wake show that up to 80 % of replenishment fluid flux entering the recirculation bubble from the free-stream flow is provided through the low-pressure side of the base, where the symmetry-breaking shear layer roll-up occurs near the base. For the optimal blowing configuration, where the wake becomes symmetric, the flux of wake replenishment is severely reduced. This flow configuration results in elongated shear layers on all sides, which terminate the bubble with a roll-up of reduced intensity at a further downstream location. The dominant cause of bubble growth and the accompanying drag reduction is attributed to the momentum of the base blowing, and the new regime is referred to as the ‘favourable momentum regime’. Similar trends are observed when the model is at

$5^{\circ }$

yaw where a reduction of drag and yaw-induced asymmetry are obtained. Proper orthogonal decomposition of the wake reveals the coherent structures related to the bistable flow and the symmetric wake under optimal blowing coefficient.
Trapped free surface waves for a Lamb–Oseen vortex flow
Authors: Zuccoli E. , Brambley E.J. , Barkley D.
Published: October 2024

Trapped surface waves have been observed in a swimming pool trapped by, and rotating around, the cores of vortices. To investigate this effect, we have numerically studied the free-surface response of a Lamb–Oseen vortex to small perturbations. The fluid has finite depth but is laterally unbounded. The numerical method used is spectrally accurate, and uses a novel non-reflecting buffer region to simulate a laterally unbounded fluid. While a variety of linear waves can arise in this flow, we focus here on surface gravity waves. We investigate the linear modes of the vortex as a function of the perturbation azimuthal mode number and the vortex rotation rate. We find that at low rotation rates, linear modes decay by radiating energy to the far field, while at higher rotation rates modes become nearly neutrally stable and trapped in the vicinity of the vortex. While trapped modes have previously been seen in shallow water surface waves due to small perturbations of a bathtub vortex, the situation considered here is qualitatively different owing to the lack of an inward flow and the dispersive nature of non-shallow-water waves. We also find that for slow vortex rotation rates, trapped waves propagate in the opposite direction to the vortex rotation, whereas, above a threshold rotation rate, waves corotate with the flow.
The flow within the head of a gravity current
Authors: Dai Albert , Huang Yu-Lin
Published: October 2024

High-resolution simulations of gravity currents in the lock-exchange configuration are conducted to study the flow within the head. The simulations exhibit the geometric features of the head as reported in the laboratory experiments and numerical simulations, and provide more detailed information on the flow within the head of a gravity current. The flow in the lower part of the head, where the lobes and clefts are forming at the leading edge, is qualitatively different from but interconnected to the flow in the upper part of the head, where steepening bulges are protruding from the upright surface above the clefts. Interestingly, regions of positive and negative streamwise vorticity are observed not only in the lower part of the head but also in the upper part of the head at staggered spanwise locations. We have shown that both the streamwise vorticity at the leading edge of the lobes in the lower part of the head and the streamwise vorticity at the steepening bulges in the upper part of the head are contributed from the twisting of spanwise vorticity into the streamwise direction, due to the geometric features of the lobes and the steepening bulges, and contributed from the baroclinic production of vorticity. Our results from visualization using tracers indicate that the ambient fluid ingested in and rising from the clefts is being swept towards the leading edge of a gravity current before being carried upwards from the leading edge to the upright surface above the left and right neighbouring lobes. Furthermore, the heavy fluid inside a lobe may descend towards the bottom boundary, move forward towards the leading edge and outwards towards the neighbouring clefts, and ultimately be carried upwards to the upright surface above the left and right neighbouring lobes. With the knowledge that the erosive power of a gravity current is concentrated in the head region, it is plausible that the bed material, once resuspended by a gravity current, may be lifted up away from the bottom boundary and be dispersed in both the streamwise and spanwise directions. The present study complements existing findings in the literature and provides new insights into the three-dimensional flow field within the head of a gravity current.
Rethinking the end of Christian Democracy
Authors: Forlenza Rosario
Published: October 2024

This article is about the seminar held at Luiss University in Rome on 17 June 2024. The seminar focused on ‘The End of Christian Democracy: A New Direction for Research’ and was the first milestone and official launch of the PRIN research project ‘The End of Christian Democracy: The Collapse of a Political Dream – Voices from the Margins’, led by a consortium of four universities: Luiss, Roma Tre, Bologna and Suor Orsola Benincasa, Naples.
Exploring the role of divination in traditional medicine in Africa: a critical perspective
Authors: Anyikwa Chukwuemeka
Published: October 2024

This paper examines the significance of divination in traditional African medicine, highlighting its impact on patient trust, perception and health outcomes. Through critical reflections, this paper interrogates the power dynamics, epistemological assumptions and ontological commitments underlying traditional medical practices, exposing the complex interplay between divination, health and wellness. By exploring the intersection of traditional medicine and modern healthcare in Africa, this research aims to deepen our understanding of divination’s role in promoting holistic well-being. This reflection concludes by suggesting ways to integrate traditional medicine into modern healthcare practices, emphasizing the importance of recognizing and respecting indigenous beliefs and practices. Ultimately, this research contributes to the growing body of literature on traditional medicine and its potential to enhance healthcare delivery in Africa.
Perspectives on Köprülü Fazıl Ahmed Pasha's (1635-1676) Grand Vizirate by Imperial Resident Casanova
Authors: Lobenwein Elisabeth
Published: October 2024

Köprülü Fazıl Ahmed Pasha's tenure as grand vizier from 1661 to 1676 stands as a seminal period in Ottoman history, and Fazıl Ahmed Pasha was a pivotal figure. This article draws upon the largely-overlooked dispatches written by Giovanni Battista Casanova, the imperial resident at the Sublime Porte. Through an analysis of Casanova's observations, this study offers fresh perspectives on the grand vizirate and of Fazıl Ahmed Pasha's enduring legacy within the Ottoman Empire. Following a brief introduction on Fazıl Ahmed Pasha's rise to power, the article's analysis unfolds across four dimensions: first, interactions between grand vizier Fazıl Ahmed and Sultan Mehmed IV; second, the closest associates of the grand vizier; third, Casanova's communication with the grand vizier; and fourth, Casanova's extensive negotiations for the release of prisoners of war.

At the core of this analysis is the argument that the communications between Casanova and Köprülü Fazıl Ahmed Pasha reveal not only the complexities of Ottoman affairs but also the strategic foundation of Ottoman military campaigns and diplomacy during this period. Through an examination of Casanova's dispatches, this article elucidates how the resident's interactions with the Ottoman court offer insights into the Ottoman Empire's strategies vis-à-vis European powers, as well as its reforms. By revisiting Fazıl Ahmed Pasha's legacy through the eyes of a contemporaneous observer, this study contributes a nuanced perspective to the understanding of Ottoman history and governance during the seventeenth century.
Historical Contexts and Polyphonic Elaborations of BENEDICAMUS in laude ihesu
Authors: Louviot Manon
Published: October 2024

This article explores creative processes in the many settings of the prosula BENEDICAMUS in laude ihesu, transmitted in a large number of European manuscripts during a period of at least three hundred years. The fourteen different polyphonic elaborations reveal a desire for multi-voiced performance shared across the whole period and geographical area under discussion. Moreover, while many of the compositional techniques are similarly widespread, the individual settings remain insistently discrete, suggesting that it was more common for a community to produce its own version of the chant than to absorb another community’s practices. This study includes a list of all known sources with polyphonic inscriptions of the prosula, highlighting the hitherto unrecognized prominence of BENEDICAMUS in laude ihesu in musical and liturgical traditions of the fourteenth to seventeenth centuries.
Dietary pattern trajectories in French adults of the NutriNet-Santé cohort over time (2014–2022): role of socio-economic factors
Authors: Toujgani Hafsa , Berlivet Justine , Berthy Florine , Allès Benjamin , Brunin Joséphine , Fouillet Hélène , Touvier Mathilde , Lairon Denis , Mariotti François , Baudry Julia , Kesse-Guyot Emmanuelle ,   the TRANSFood Consortium
Published: October 2024

Despite the urgent need for plant-based dietary shifts, few studies have examined current diet trajectories using longitudinal data. This study analyzed dietary transitions of French adults over 8 years (2014-2022), assessing diet quality and the role of various socio-economic factors. Consumption data from 17 187 NutriNet-Santé cohort participants, weighted for the French Census, were collected via FFQ in 2014, 2018 and 2022. Adopting a gender-specific approach, consumption changes in twenty-three food groups were assessed over time. Diet quality was evaluated using the Comprehensive Diet Quality Index score, categorising foods into ‘healthy’ and ‘unhealthy’. Socio-economic analysis targeted four food groups (red meat (including fresh beef, pork, offal and lamb), processed meat (e.g. sausages, ham and bacon), legumes and whole-grain products), strongly linked to mortality risk and recognised as significant markers of the sustainable diet transition. All analyses were conducted using multi-adjusted mixed-effects models. Consumption of some healthy plant-based foods (nuts +59 %, legumes +22 %, whole-grain products +7 %) significantly increased over time, while consumption of some unhealthy foods (red meat −19 %, refined cereals −18 %, sweetened drinks −15 %) decreased. Conversely, consumption of prepared and mixed dishes (+16 %) and processed meat (+35 %) increased. These changes differed in magnitude between genders and translated into an improved diet quality score (Comprehensive Diet Quality Index). Occupational status was linked to longitudinal changes in food consumption, showing increased consumption of plant-based foods among students and higher socio-professional categories. Our findings provide accurate data on trends and factors for targeted initiatives, guiding strategic interventions for a sustainable dietary transition.
A Ceramic Mould from Vindolanda: Craft and Industry along the Roman Frontier
Authors: Harvey Craig A.
Published: October 2024

This short contribution presents an enigmatic clay mould recovered from a tile kiln in Vindolanda's North Field. This complete mould contains an impression of Apollo in bust form, but its exact use is unclear. This paper presents the mould and discusses its potential use for the manufacture of ceramic figurines. Found in an industrial area of the site, its discovery also provides valuable evidence for craft production along this frontier and hints at a largely unknown provincial industry.
Genomic and transcriptomic evaluations of infertile or subfertile Arunachali yak sperm
Authors: Das Pranab Jyoti , Kour Aneet , Bhati Jyotika , Mishra Dwijesh Chandra , Sarkar Mihir
Published: October 2024

Sperm infertility or subfertility is detrimental to the precious highland germplasm like yak whose population has been gradually declining in India. Understanding the ‘omic’ landscape of infertile or subfertile yak sperm can reveal some interesting insights. In an attempt to do the same, this study considered the semen of infertile or subfertile yak bulls for whole-genome and transcriptome evaluations. DNA sequencing revealed that the yak sperm genome contains the necessary genes to carry out all the important biological processes related to the growth, development, survival and multiplication of an organism. Interestingly, RNA Seq results highlighted that genes like VAMP7, MYLK, ARAP2 and MARCH6 showed increased expression, while biological processes related to immune response (GO:0043308, GO:0002447, GO:0002278, GO:0043307, GO:0043312, GO:0002283, GO:0043299 and GO:0002446) were significantly overrepresented. These findings hint at a possible role played by immune system in regulating infertility or subfertility in yaks. Further, in-depth studies can validate these findings and help in improving our biological understanding in this area.
Ductal stenting for retraining the left ventricle in patients with transposition of great arteries with intact ventricular septum: a single-centre experience
Authors: Banerji Nayan , Parikh Rujuta , Parmar Tarun , Champaneri Bhavik , Pota Abhay , Pathak Nihar , Mishra Amit , Gajjar Trushar , Surti Jigar , Gangwani Amit , Patel Krutika
Published: October 2024

Introduction

Ductal stenting in late presenters with transposition of great arteries with intact ventricular septum retrains the left ventricle before arterial switch operation. However, the experience is limited for its efficacy and safety. This study aims to highlight the efficacy and safety of ductal stenting for retraining the left ventricle.

Methods:

Eight children with transposition of great arteries-intact ventricular septum and regressed left ventricle underwent ductal stenting. Serial echocardiographic measurements of left ventricle shape, mass, volume, free wall thickness, and function were done, and arterial switch operation was performed once the left ventricle was adequately prepared. Post-operative outcome in terms of duration of mechanical ventilation, ICU stay, and improvement in left ventricle function were monitored.

Results:

The procedure was successful in all patients. Babies were divided into two groups on basis of age at ductal stenting (group 1 age less than 90 days and group 2 age more than 90 days) and were evaluated for the degree of left ventricle retraining as evidenced by echocardiographic parameters and post-operative variables. The left ventricle posterior wall thickness and mass index after ductal stenting increased significantly in both the groups. Postoperatively, one baby of group two expired after seven days due to severe left ventricle dysfunction. Rest babies had an uneventful post-operative ICU stay with no statistical difference in the duration of invasive mechanical ventilation or ICU stay. On six-month follow-up, all surviving babies were doing well with normal left ventricle function.

Conclusion:

Ductal stenting is a good alternative measure as compared to surgical procedures for left ventricle retraining in transposition of great arteries with regressed left ventricle.
Wechsler Adult Intelligence Scale – IV México versus U.S. versions in the assessment of Mexican Americans
Authors: Ontiveros Gabriela , Gasquoine Philip Gerard
Published: October 2024

Objective:

To delineate score differences between the Wechsler Adult Intelligence Scale-IV (WAIS-IV) and the WAIS-IV México in the assessment of balanced bilingual Mexican Americans and to determine the efficacy of five hold measures in predicting summary scores in each version.

Methods:

Hold measures were WAIS-IV Information, Vocabulary, and Matrix Reasoning subtests, picture vocabulary, and the Test of Premorbid Function (English)/Word Accentuation Test (Spanish). Using a repeated measures design, 60 neurologically intact participants were tested in a counterbalanced order, with WAIS-IV version as the repeated measure (mean intertest interval = 5.68 days). To minimize practice effects, the five visual-perceptual subtests, which contain the same items in each version, were administered only once during the initial session.

Results:

All mean WAIS-IV México index/subtest scores were significantly higher than the U.S. equivalents (Full-Scale IQ by about .5 SD). Unexpectedly, most (83%) participants educated in the US to at least a high school level had numerically equal or higher scores on the U.S. version. Means on WAIS-IV language format indices/subtests were lower than those of visual-perceptual format indices/subtests within both versions (excepting Processing Speed Index/subtests in the U.S. version). All hold measures significantly predicted WAIS-IV summary scores for the U.S. version. Similarly for the México version, except for the Word Accentuation Test.

Conclusions:

When evaluating a balanced bilingual Mexican American, opting for the WAIS-IV México version will yield higher scores across the Full-Scale IQ, indices, and all core subtests unless the patient was educated in the US to at least a high school level.
Stock market volatility and commodity prices
Authors: Kang Wilson , Perez de Gracia Fernando , Ratti Ronald A.
Published: October 2024

This paper empirically examines the dynamic relationship between stock market volatility and commodity prices through the time-varying risk aversion channel using daily data between December 31 in 1999 and June 14 in 2021. We employ a time-varying structural-form vector autoregressive model (VAR) model with (aggregate, sectoral and sixteen individual) commodity prices. The results suggest that the transmission mechanism of stock market volatility shocks on the commodity prices change over time. The negative effect of stock market volatility on commodity prices is more statistically significant in the 2008–09 Global Financial Crisis than that during the COVID-19 pandemic in 2020. Further, the effect is greater in energy commodities compared to the agricultural and metals markets. The long-lasting negative effect of risk aversion is stronger compared to that of the expected stock market volatility on the commodity price. The change in the stock-commodity transmission mechanism is likely due to changes in underlying sources of risk aversion and expected uncertainty over time.
An Environmental Agreement in a Trade Court – Is the WTO's Agreement on Fisheries Subsidies Enforceable?
Authors: Auld Kathleen , Del Savio Linda , Feris Loretta
Published: October 2024

The 2022 Agreement on Fisheries Subsidies (AFS) is the culmination of over 20 years of negotiations within the WTO's Doha Development Round. Although it can be considered a small victory in the fight against declining fish stocks, the Agreement remains unfinished and underdeveloped. Of particular concern is the enforceability of the Agreement. While WTO Members recognize that the AFS was created to deal with a problem that has both socioeconomic and environmental implications, the Agreement relies on established WTO dispute settlement rules, which were created to resolve trade disputes. The paper assesses the difficulties of enforcing the AFS under these rules and considers additional provisions that could be included in subsequent negotiating rounds to ensure an effective and enforceable agreement. Recommendations cover different stages of the dispute settlement process and include alternative means of dispute resolution, measures to expedite proceedings, and retaliation procedures adapted to the AFS.
Organizing Black Business: The National Negro Business League, 1900–1915
Authors: Chamberlain Adam , Yanus Alixandra B.
Published: October 2024

Founded by Booker T. Washington in 1900, the National Negro Business League (NNBL) sought to unite Black business owners, promote entrepreneurship, and develop economic power. Despite its prominence in the early twentieth century, the group declined after Washington’s death in 1915. As a result, little is known about its organizational development. This study uses data on state and local Negro Business Leagues (NBLs), along with active and life members of the NNBL, to better understand the group’s first fifteen years. Analyses reveal that the NNBL’s development reflected closely the social and economic context of early twentieth century Black America. Generally speaking, the NNBL was stronger in states with larger urban Black populations and where the value of Black-owned farms was higher, consistent with the importance of agriculture to Black business during this era. These results both shed light on the NNBL’s early success and suggest avenues for future research on its decline.
Tradition Meets Democracy: Perceptions of Women’s Political Leadership in Samoa
Authors: Baker Kerryn , Tauaa Tuiloma Susana , Vaai Silafau Sina , Mudaliar Christopher , Leach Michael , Barbara Julien
Published: October 2024

Women are globally underrepresented as political leaders; as of January 2023, only 17 countries had a woman head of government. Included in this small group is Samoa, which elected Fiame Naomi Mata’afa as its first woman prime minister in 2021 after a fiercely contested election and subsequent protracted legal disputes centered around interpretations of Samoa’s 10% gender quota. Drawing on data from the Pacific Attitudes Survey, the first large-scale, nationally representative popular political attitudes survey conducted in the Pacific region, this article examines how the political environment in Samoa shapes opportunities for women’s political participation and leadership. Using the theoretical framework of cohabitation, it finds that although there is an enabling environment for women’s participation and leadership in formal politics, women’s access to decision-making spaces more broadly is still constrained by norms of traditional leadership. This speaks to traditional and nontraditional political norms and practices that coexist, at times uneasily, alongside one another.
Vertical Profile Analysis of Cloud Feedbacks
Authors: Kawai Hideaki , Koshiro Tsuyoshi , Yukimoto Seiji
Published: October 2024

Cloud feedback is the largest source of uncertainty in climate sensitivity. This feedback is generally discussed in terms of radiative flux at the top of the atmosphere, but the vertical distribution of the contribution of cloud changes to the top‐of‐atmosphere cloud feedback should be discussed to understand the feedback in greater detail. We have developed a simple analysis method called “vertical profile analysis of cloud feedback,” which simply uses radiative flux data from each level of the model. The analysis is applied for typical cloud regimes and the results are discussed together with cloud fraction change profiles. The advantages and disadvantages of the vertical profile analysis, compared with the commonly used International Satellite Cloud Climatology Project (ISCCP) histogram kernel method, are discussed. Our analysis has the advantage of resolving the detailed vertical profiles of the contribution to the top‐of‐atmosphere cloud feedback from the changes in cloud regimes associated with warming, such as reduced cloud cover and upward shifts of the cloud layer in subtropical low‐cloud regions as well as the increased height of the melting layer in tropical deep convection. The main disadvantage is that the vertical profile analysis cannot represent the feedback components sorted by cloud optical thickness as in the ISCCP histogram kernel method.
Vortex Trapping of Suspended Sand Grains Over Ripples
Authors: Frank‐Gilchrist Donya P. , Penko Allison M. , Palmsten Margaret L. , Calantoni Joseph
Published: October 2024

Coastal hydrodynamics and morphodynamics integrate the effects of small‐scale fluid‐sediment interactions; yet, these small‐scale processes are not well understood. To investigate sediment trapping by turbulent coherent structures or vortices, the transport of coarse sand over ripples was analyzed in a small‐oscillatory flow tunnel with phase‐separated Particle Image and Tracking Velocimetry. Results from one of the first direct measurements of vortex‐trapped sand grains under oscillatory flows are presented. The vortices mobilized sand grains along the ripple slopes just prior to flow reversal and transported the suspended sediment grains. During several flow cycles, some sand grains were temporarily trapped in the vortex, prescribing semi‐circular trajectories off‐center from the vortex core in quadrants of the vortex that were closest to the ripple slope, as illustrated by Nielsen (1992, https://doi.org/10.1142/1269). Comparisons of the horizontal sediment grain velocity with the horizontal fluid velocity yielded a linear relationship with a slope of 0.87. The vertical grain velocities also varied linearly with the vertical fluid velocity with a slope of approximately 1 and an offset of −0.08 m . The offset is close to the still water settling velocity for coarse sand grains, as hypothesized during vortex trapping. Additionally, estimates of the off‐center distance, between the centers of the semi‐circular sediment paths and vortex cores, compared well with the ratio of the settling velocity to the radian frequency of the vortex yielding a linear regression slope of 0.99. Improved understanding of vortex trapping effects on sediment dynamics may decrease uncertainty in model predictions of large‐scale coastal hydrodynamics and sediment transport.
Estimating Fishing Exploitation Rates to Simulate Global Catches and Biomass Changes of Pelagic and Demersal Fish
Authors: van Denderen P. D. , Jacobsen N. , Andersen K. H. , Blanchard J. L. , Novaglio C. , Stock C. A. , Petrik C. M.
Published: October 2024

Robust projections of future trends in global fish biomass, production and catches are needed for informed fisheries policy in a changing climate. Trust in future projections, however, relies on establishing that models can accurately simulate past relationships between exploitation rates and ecosystem states. In addition, historical simulations are important to describe how the oceans have changed due to fishing. Here we use fisheries catch, catch‐only assessment models and effort data to estimate regional fishing exploitation levels, defined as the fishing mortality relative to fishing mortality at maximum sustainable yield (F/FMSY). These estimates are given for large pelagic, forage and demersal fish types across all large marine ecosystems and the high seas between 1961 and 2004; and with a ‘ramp‐up’ between 1841 and 1960. We find that global exploitation rates for large pelagic and demersal fish consistently exceed those for forage fish and peak in the late 1980s. We use the rates to globally simulate historical fishing patterns in a mechanistic fish community model. The modeled catch aligns with the reconstructed catch, both for total catch and catch distribution by functional type. Simulations show a clear deviation from an unfished model state, with a 25% reduction in biomass in large pelagic and demersal fish in shelf regions in recent years and a 50% increase in forage fish, primarily due to reduced predation. The simulations can set a baseline for assessing the effect of climate change relative to fishing. The results highlight the influential role of fishing as a primary driver of global fish community dynamics.
Knowledge‐Based Deep Learning to Predict Vegetation Carbon, Nitrogen and Phosphorus Densities in China’s Shrublands
Authors: Deng Ying , Xu Wenting , Xiong Gaoming , Zhao Changming , Wang Yang , Zhou Chenyang , Li Jiaxiang , Liu Qing , Tang Zhiyao , Xie Zongqiang
Published: October 2024

Accurate estimations of carbon (C), nitrogen (N), and phosphorus (P) densities in shrublands are pivotal for assessing terrestrial ecosystem carbon sequestration. Combining in‐situ investigations and machine learning facilitates large‐scale patterns mapping, however, which often overlooks underlying ecological regulations. Here we utilize data from 1,122 survey plots across China's shrublands and develop a novel knowledge‐based deep learning framework that integrates a structural equation model (SEM) to elucidate mechanisms and construct an artificial neural network (ANN) based on these causal relationships. Results show that biomass allocation to different organs follows allometric regulations and that N and P concentrations maintain a degree of stoichiometric homeostasis following biological stoichiometry theory. This insight guides the construction of our ANN, which outperforms both SEM and other prevalent machine learning methods. By leveraging ecological theories to inform model construction, our framework not only enhances prediction accuracy and explainability but also provides a methodological blueprint for ecological research.
A Robust Method for Selecting a High‐Quality Interferogram Subset in InSAR Surface Deformation Analysis
Authors: Zebker M. S. , Chen J.
Published: October 2024

The accuracy of Interferometric Synthetic Aperture Radar surface deformation solutions depends on the quality of the chosen interferogram subset. We present a method to select interferogram subsets based on unwrapping errors rather than temporal baseline thresholds. Using Sentinel‐1 interferograms over the Tulare Basin, California, we show that subtle phase noise can lead to up to 31.5 mm/yr line‐of‐sight (LOS) errors in short temporal baseline subset solutions, while decorrelation leads to a systematic underestimation of LOS rates (up to 92.3 mm/yr) in long temporal baseline subset solutions. Our new workflow better mitigates these noise sources at the same time. In the Eagle Ford region, Texas, our strategy better reconstructed up to 11.9 cm of cumulative LOS deformation between 2017 and 2021 over a 900 region. This deformation feature can be linked to the total volume of produced oil and water through a linear relationship.
Evaluation of the Representation of Raindrop Self‐Collection and Breakup in Two‐Moment Bulk Models Using a Multifrequency Radar Retrieval
Authors: Niquet L. , Tridon F. , Grzegorczyk P. , Causse A. , Bordet B. , Wobrock W. , Planche C.
Published: October 2024

Using multifrequency radar observations providing raindrop size distribution evolution with high spatial and temporal resolution, this study aims to assess the ability of different parameterizations of raindrop self‐collection and breakup processes applied in mesoscale models, to reproduce the statistics derived from observations. The stratiform zones of two types of precipitating systems are studied, a frontal situation that occurred over Finland in June 2014 and a squall line system observed over Oklahoma in June 2011. An analysis method for determining raindrop trajectories was used to obtain the temporal variation of the total raindrop concentration from the observations. The resulting raindrop concentration rate as a function of the mean volume diameter reveals significant differences with the parameterizations currently used in two‐moment bulk microphysics schemes. These results show that even if they produce variations in raindrop concentration of the same order of magnitude as the observations, the current parameterizations diverge from the median of the observations, resulting in an overestimation of either the self‐collection or the breakup process. From the median of radar observations, new parameterizations of the self‐collection and breakup processes and of rain self‐collection efficiency are developed and can be implemented in two‐moment bulk microphysics schemes.
Distinct Radiative and Chemical Impacts Between the Equatorial and Northern Extratropical Volcanic Injections
Authors: Peng Yifeng , Tian Wenshou , Li Chenwei , Xue Haiyang , Yu Pengfei
Published: October 2024

Stratospheric volcanic aerosols can affect the global radiative balance and stratospheric composition. In this study, we analyze ensemble experiments with an interactive stratospheric aerosol microphysical general circulation model, designed to assess the climate forcing from large‐magnitude explosive eruptions in the tropics and northern extratropics. Previous studies have generally identified a lower radiative forcing from extratropical eruptions from the shorter stratospheric lifetime of volcanic sulfate aerosols. However, our study finds that both the shorter lifetime and lower effective radiative forcing (ERF) efficacy contribute to the lower ERF in the northern extratropical eruptions. The simulated 2‐year averaged ERF efficacy in northern extratropical eruptions is 22% lower than that in the equatorial eruptions due to the seasonal mismatch of peak stratospheric aerosol optical depth and solar radiation in the first year after a northern extratropical volcanic eruption. Additionally, equatorial eruptions accelerate the Brewer‐Dobson circulation (BDC), while northern hemispheric (NH) extratropical eruptions decelerate the BDC branch in NH and accelerate the BDC branch in southern hemisphere (SH), leading to different spatio‐temporal pattern of ozone anomalies. Consequently, dominated by the dynamical processes, equatorial eruption leads to ozone loss in tropics and increase in midlatitudes, while both northern extratropical summer and winter eruptions trigger ozone decrease in NH and increase in SH.
Dust Dynamics in Gale Crater Observed Using the Line‐Of‐Sight Extinction Through 3,663 Sols of the Mars Science Laboratory Mission
Authors: Bischof G. , Guzewich S. D. , Moores J. E. , Lemmon M. T. , Battalio J. M. , Hayes C. W. , Innanen A. C. , Smith C. L.
Published: October 2024

The Curiosity Rover has been exploring the Gale Crater using the on‐board Navigation Camera to monitor the line‐of‐sight (LOS) dust extinction within the crater. Previous studies of the line‐of‐sight extinction have shown an annual trend where a minimum in extinction occurs around Ls = 100° and a maximum occurs around Ls = 300°. However, past studies have been constrained to images acquired only between 10:00 and 14:00 local time, limiting our understanding of the variation of dust extinction in Gale Crater throughout the day. Here, using a method that corrects for variable lighting geometry, we reanalyze the line‐of‐sight images captured throughout the mission to include images acquired in the early morning and late afternoon. Additionally, we update the line‐of‐sight record to include over 1,000 additional sols of the mission through sol 3,663, which updates our record of extinction in Gale to the end of Mars Year 36—a period of almost 5.5 Mars Years. Using images taken throughout the sol, we examine the diurnal trend in dust extinction, where a maximum is seen around solar noon. This diurnal trend is observed throughout the year, with a larger diurnal variation observed during the southern summer. Additionally, the geographic homogeneity in dust loading is quantified, with higher dust loading observed in the western portion of the line‐of‐sight images, corresponding with the north‐western portion of the crater rim. These observations suggest that dust lifting from the surface and vertical mixing are factors in the diurnal, seasonal, and geographic dynamics observed in the extinctions.
Geostratigraphic Mapping of the Intrusive Valentine Domes on the Moon
Authors: Suárez‐Valencia Javier Eduardo , Rossi Angelo Pio
Published: October 2024

Lunar intrusive igneous domes have not been the center of much research in the past due to their rare occurrence on the lunar surface, and the difficulty in locating them. Most of the known structures were discovered using images with low illumination angles, including data from the Lunar Orbiter, telescopic images, and photos taken during the Apollo Missions. These intrusive domes are characterized by an oval shape and low slopes. We analyzed one of these systems, the Valentine domes, located near the rim of the western Serenitatis basin, with modern techniques and data sets from the Lunar Reconnaissance Orbiter (LRO) and Chandrayaan‐1 missions. We created a geostratigraphic map of the area, combining geomorphological and spectral classifications. The aspect map (direction of the slope) proved to be the most suitable product to locate and delimit these structures; using it, we identified a new dome southeast of the principal body, suggesting that the intrusive system is larger than previously thought. It was found that the three domes can be classified as laccoliths, and that several derived structures such as rilles, dykes, and secondary domes represent different stages of intrusive activity in the area. Based on crater counting analysis, we determined that the intrusive activity began after 2.98 ± 0.15 Ga and lasted at least until 1.88 ± 0.5 Ga ago.
Fast Joint DOA and Inter‐Subarray Errors Estimation in Partly Calibrated Arrays
Authors: Song Qi , Yan Feng‐Gang , Meng Xiang‐Tian , Cao Bing‐Xia , Jin Ming
Published: October 2024

In this paper, we utilize the original noise subspace and its conjugate to reconstruct a new estimator for the fast joint estimation of DOA and inter‐subarray errors in the partly calibrated arrays (PCA), namely fast‐rank‐reduce (F‐RARE). Based on the new estimator, the collection of true DOA estimation and its virtual mirror can be obtained by searching over only half of the total angular field‐of‐view. Then, the true DOA estimation can be selected by using the conventional beamforming (CBF) technique. Additionally, the inter‐subarray errors can also be computed by a finite number of subspace decompositions. Numerical simulation illustrates that compared with the conventional RARE algorithm, the new method can not only reduce the computational burden by a half but also provide a similar estimation accuracy.
Generation of squeezed vacuum state in the millihertz frequency band
Authors: Gao Li , Zheng Li-ang , Lu Bo , Shi Shaoping , Tian Long , Zheng Yaohui
Published: October 2024

The detection of gravitational waves has ushered in a new era of observing the universe. Quantum resource advantages offer significant enhancements to the sensitivity of gravitational wave observatories. While squeezed states for ground-based gravitational wave detection have received marked attention, the generation of squeezed states suitable for mid-to-low-frequency detection has remained unexplored. To address the gap in squeezed state optical fields at ultra-low frequencies, we report on the first direct observation of a squeezed vacuum field until Fourier frequency of 4 millihertz with the quantum noise reduction of up to 8.0 dB, by the employment of a multiple noise suppression scheme. Our work provides quantum resources for future gravitational wave observatories, facilitating the development of quantum precision measurement.
Associations of ethnicity, skin tone, and genome-wide sequencing with bone mineral density in adolescents
Authors: Gordon Catherine M. , Fleisch Abby F. , Hivert Marie-France , Rokoff Lisa B. , Rifas-Shiman Sheryl L. , Raphael Jean L. , Oken Emily
Published: October 2024

Background

Dual-energy x-ray absorptiometry reference data designate Black and non-Black categories, as higher BMD has been documented among Black youth. We examined associations of race, skin tone, and genetic factors with bone mineral density (BMD).

Methods

557 adolescents were followed longitudinally. Exposures included race, skin tone, and principal components (PC) from genome-wide arrays. Total body BMD Z-score (BMD-Z) was the primary outcome using linear regression.

Results

359 adolescents identified as non-Hispanic White (NHW) and 75, non-Hispanic Black (NHB). BMD-Z was higher in NHB vs. NHW (β: 0.92 units, 95% CI: 0.64, 1.19) or those with darker skin (0.79, 95% CI: 0.49, 1.08 for brown vs. medium). The first genetic PC (PC1) correlated with identification as NHB. PC1 was associated with higher BMD-Z (0.09, 95% CI: 0.06, 0.12), even after including race (0.07, 95% CI: 0.00, 0.14) or skin tone (0.10, 95% CI: 0.05, 0.15); both race (0.26, 95% CI: −0.49, 1.01 for NHB vs. NHW) and skin tone (−0.08, 95% CI: −0.59, 0.44 for brown vs. medium) no longer predicted BMD-Z after adjustment for PC1.

Conclusion

Genetic similarity was robustly associated with BMD, prompting a reevaluation of adolescent BMD reference data to exclude the consideration of race.

Impact

Current bone density reference databases include a binary assignment of patients into “Black” and “non-Black” categories, as a higher BMD has been documented among those identifying as Black compared with individuals of other racial and ethnic backgrounds.

This study found genetic similarity to be more strongly associated with bone density by dual-energy x-ray absorptiometry than race or skin tone.

These data emphasize a need to reevaluate how bone density measurements are interpreted, including exploring reference data that exclude the consideration of race.