bluuebunny/crossref_metadata_2025 huggingface dataset:
Dynamics of a data-driven low-dimensional model of turbulent minimal Couette flow
Authors: Linot Alec J. , Graham Michael D.
Published: October 2023

Because the Navier–Stokes equations are dissipative, the long-time dynamics of a flow in state space are expected to collapse onto a manifold whose dimension may be much lower than the dimension required for a resolved simulation. On this manifold, the state of the system can be exactly described in a coordinate system parameterising the manifold. Describing the system in this low-dimensional coordinate system allows for much faster simulations and analysis. We show, for turbulent Couette flow, that this description of the dynamics is possible using a data-driven manifold dynamics modelling method. This approach consists of an autoencoder to find a low-dimensional manifold coordinate system and a set of ordinary differential equations defined by a neural network. Specifically, we apply this method to minimal flow unit turbulent plane Couette flow at$Re=400$, where a fully resolved solutions requires${O}(10^5)$degrees of freedom. Using only data from this simulation we build models with fewer than$20$degrees of freedom that quantitatively capture key characteristics of the flow, including the streak breakdown and regeneration cycle. At short times, the models track the true trajectory for multiple Lyapunov times and, at long times, the models capture the Reynolds stress and the energy balance. For comparison, we show that the models outperform POD-Galerkin models with$\sim$2000 degrees of freedom. Finally, we compute unstable periodic orbits from the models. Many of these closely resemble previously computed orbits for the full system; in addition, we find nine orbits that correspond to previously unknown solutions in the full system.
Three-dimensional transition and force characteristics of low-Reynolds-number flows past a plunging airfoil
Authors: Gao An-Kang , Cantwell Chris D. , Son Onur , Sherwin Spencer J.
Published: October 2023

The three-dimensional (3-D) transition of the leading-edge vortex (LEV) and the force characteristics of the plunging airfoil are investigated in the chord-based Strouhal number

$St_c$

range of 0.10 to 1.0 by means of experimental measurements, numerical simulations and linear stability analysis in order to understand the spanwise instabilities and the effects on the force. We find that the interaction pattern of the LEV, the LEV from a previous cycle (pLEV) and the trailing-edge vortex (TEV) is the primary mechanism that affects the 3-D transition and associated force characteristics. For

$St_c \leq 0.16$

, the 3-D transition is dominated by the LEV–TEV interaction. For

$0.16 < St_c \leq 0.44$

, the TEV lies in the middle of the LEV and the pLEV and therefore vortex interaction between them is relatively weak; as a result, the LEV remains two-dimensional up to a relatively high Reynolds number of

$Re = 4000$

at

$St_c = 0.32$

. For

$0.44 < St_{c} \leq 0.54$

, and at relatively low Reynolds numbers, the pLEV and the TEV tend to form a clockwise vortex pair, which is beneficial for the high lift and stability of the LEV. For

$0.49 \leq St_c$

, the pLEV and TEV tend to form an anticlockwise vortex pair, which is detrimental to the lift and flow stability. In the last

$St_c$

range, vortex interaction involving the LEV, the TEV and the pLEV results in an unstable period-doubling mode which has a wavelength of about two chord-lengths and the 3-D transition enhances the lift.
On the non-self-adjoint and multiscale character of passive scalar mixing under laminar advection
Authors: Jiménez-Urias Miguel A. , Haine Thomas W.N.
Published: October 2023

Except in the trivial case of spatially uniform flow, the advection–diffusion operator of a passive scalar tracer is linear and non-self-adjoint. In this study, we exploit the linearity of the governing equation and present an analytical eigenfunction approach for computing solutions to the advection–diffusion equation in two dimensions given arbitrary initial conditions, and when the advecting flow field at any given time is a plane parallel shear flow. Our analysis illuminates the specific role that the non-self-adjointness of the linear operator plays in the solution behaviour, and highlights the multiscale nature of the scalar mixing problem given the explicit dependence of the eigenvalue–eigenfunction pairs on a multiscale parameter

$q=2{\rm i}k\,{\textit {Pe}}$

, where

$k$

is the non-dimensional wavenumber of the tracer in the streamwise direction, and

${\textit {Pe}}$

is the Péclet number. We complement our theoretical discussion on the spectra of the operator by computing solutions and analysing the effect of shear flow width on the scale-dependent scalar decay of tracer variance, and characterize the distinct self-similar dispersive processes that arise from the shear flow dispersion of an arbitrarily compact tracer concentration. Finally, we discuss limitations of the present approach and future directions.
Slumping regime in lock-release turbidity currents
Authors: Gadal Cyril , Mercier M.J. , Rastello M. , Lacaze L.
Published: October 2023

Most gravitational currents occur on sloping topographies, often in the presence of particles that can settle during the current propagation. Yet an exhaustive exploration of associated parameters in experimental studies is still lacking. Here, we present an extensive experimental investigation of the slumping regime of turbidity (particle-laden) currents in two lock-release (dam-break) systems with inclined bottoms. We identify three regimes controlled by the ratio between settling and current inertia. (i) For negligible settling, the turbidity current morphodynamics corresponds to that of saline homogeneous gravity currents, in terms of velocity, slumping (constant-velocity) regime duration and current morphology. (ii) For intermediate settling, the slumping regime duration decreases to become fully controlled by a particle settling characteristic time. (iii) When settling overcomes the current initial inertia, the slumping (constant-velocity) regime is no longer detected. In the first two regimes, the current velocity increases with the bottom slope, of approximately$35\,\%$between$0^\circ$and$15^\circ$. Finally, our experiments show that the current propagates during the slumping regime with the same shape in the frame of the moving front. Strikingly, the current head is found to be independent of all experimental parameters covered in the present study. We also quantify water entrainment coefficients$E$and compare them with previous literature, hence finding that$E$increases rather linearly with the current Reynolds number.
A novel (2+1)-dimensional nonlinear evolution equation for weakly stratified free-surface boundary layers
Authors: Oloo Joseph O. , Shrira Victor I.
Published: October 2023

To get an insight into the dynamics of the oceanic surface boundary layer we develop an asymptotic model of the nonlinear dynamics of linearly decaying three-dimensional long-wave perturbations in weakly stratified boundary-layer flows. Although in nature the free-surface boundary layers in the ocean are often weakly stratified due to solar radiation and air entrainment caused by wave breaking, weak stratification has been invariably ignored. Here, we consider an idealized hydrodynamic model, where finite-amplitude three-dimensional perturbations propagate in a horizontally uniform unidirectional weakly stratified shear flow confined to a boundary layer adjacent to the water surface. Perturbations satisfy the no-stress boundary condition at the surface. They are assumed to be long compared with the boundary-layer thickness. Such perturbations have not been studied even in a linear setting. By exploiting the assumed smallness of nonlinearity, wavenumber, viscosity and the Richardson number, on applying triple-deck asymptotic scheme and multiple-scale expansion, we derive in the distinguished limit a novel essentially two-dimensional nonlinear evolution equation, which is the main result of the work. The equation represents a generalization of the two-dimensional Benjamin–Ono equation modified by the explicit account of viscous effects and new dispersion due to weak stratification. It describes perturbation dependence on horizontal coordinates and time, while its vertical structure, to leading order, is given by an explicit analytical solution of the linear boundary value problem. It shows the principal importance of weak stratification for three-dimensional perturbations.
Streamwise vortex breakdown due to the interaction with crossed shock waves
Authors: Hiejima Toshihiko
Published: October 2023

This paper presents a vortex breakdown study due to the interaction between a Batchelor vortex and the crossing of oblique shock waves with Mach numbers of 3.5 and 5.0, favourable for supersonic mixing and combustion, respectively. Numerical simulations were conducted to investigate the effects of the circulation intensity and shock angle on vortex breakdown. The results indicate that a breakdown occurs at the shock angle

$\beta \geqslant 45^\circ$

or the vortex circulation

$q = 0.32$

, and the configuration is a bubble structure with a recirculation region; most of the breakdowns possess a stagnation point. Furthermore, the structure differs from that of a normal shock wave and vortex interaction because the bubble region is subsonic and does not comprise a normal shock wave on the inside. Additionally, this vortex breakdown shows that the momentum flux on the centreline decreases once at the tip of the bubble owing to a sudden drop in velocity in the subsonic region. In addition, the enstrophy production resulting from vortex stretching and tilting is found to have a significant advantage in the interaction region. Based on these results, the threshold required for a bubble vortex breakdown was theoretically derived as an inequality. The numerical simulation results support the theoretical criterion obtained from the proposed inequality. Therefore, a streamwise vortex breakdown resulting from the interaction between the vortex and intersecting oblique-shocks should be reasonably predicted.
Against Defending Science: Asking Better Questions About Indigenous Knowledge and Science
Authors: Parke Emily C. , Hikuroa Daniel
Published: October 2023

This article addresses problems with a defensive turn in discussions of science and Indigenous ways of knowing, being, and doing. Philosophers and practitioners of science have focused recent discussions on coarse-grained questions of demarcation, epistemic parity, and identity—asking questions such as “Is Indigenous knowledge science?” Using representative examples from Aotearoa New Zealand, we expose rampant ambiguities in these arguments, and show that this combative framing can overlook what is at stake. We provide a framework for analyzing these problems and suggest better ways forward.
Social Dynamics and the Evolution of Disciplines
Authors: Wong Kekoa , Rubin Hannah
Published: October 2023

We consider the long-term evolution of science and show how a “contagion of disrespect”—an increasing dismissal of research in subfields associated with marginalized groups—can arise due to the dynamics of collaboration and reputation (versus, e.g., preconceived notions of the field’s worth). This has implications both for how we understand the history of science and for how we attempt to promote diverse scientific inquiry.
The 1991 review by Coen and Meyerowitz on the war of the whorls and the ABC model of floral organ identity
Authors: Schneitz Kay
Published: October 2023

The 1991 review paper by Coen and Meyerowitz on the control of floral organ development set out the evidence available at that time, which led to the now famous ABC model of floral organ identity control. The authors summarised the genetic and molecular analyses that had been carried out in a relatively short time by several laboratories, mainly in Arabidopsis thaliana and Antirrhinum majus. The work was a successful example of how systematic genetic and molecular analysis can decipher the mechanism that controls a developmental process in plants. The ABC model is a combinatorial model in which each floral whorl acquires its identity through a unique combination of floral homeotic gene activities. The review also highlights the similarities in the regulation of floral organ identity between evolutionarily distant plant species, emphasising the general relevance of the model and paving the way for comprehensive studies of the evolution of floral diversity.
Plant-based diets benefit aerobic performance and do not compromise strength/power performance: a systematic review and meta-analysis
Authors: Damasceno Yancka Oliveira , Leitão Cauã V. F. S. , de Oliveira Gabriel Moraes , Andrade Fernando Augusto Barcelos , Pereira André B. , Viza Rodrigo S. , Correia Renata C. , Campos Helton O. , Drummond Lucas R. , Leite Laura H. R. , Coimbra Cândido C.
Published: October 2023

Plant-based diets have emerged as athletic performance enhancers for various types of exercise. Therefore, the present study evaluated the effectiveness of plant-based diets on aerobic and strength/power performances, as well as on BMI of physically active individuals. This systematic review and meta-analysis was conducted and reported according to the guidelines outlined in the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) statement. A systematic search of electronic databases, including PubMed, Web of Science and SPORTDiscus, was performed. On the basis of the search and inclusion criteria, four and six studies evaluating the effects of plant-based diets on aerobic and strength/power performances in humans were, respectively, included in the systematic review and meta-analysis. Plant-based diets had a moderate but positive effect on aerobic performance (0·55; 95 % CI 0·29, 0·81) and no effect on strength/power performance (–0·30; 95 % CI −0·67, 0·07). The altogether analyses of both aerobic and strength/power exercises revealed that athletic performance was unchanged (0·01; 95 % CI −0·21, 0·22) in athletes who adopted plant-based diets. However, a small negative effect on BMI (–0·27; 95 % CI −0·40, –0·15) was induced by these diets. The results indicate that plant-based diets have the potential to exclusively assist aerobic performance. On the other hand, these diets do not jeopardise strength/power performance. Overall, the predicted effects of plant-based diets on physical performance are impactless, even though the BMI of their adherents is reduced.
Classification of subpencils for hyperplane sections on certain K3 surfaces
Authors: Takahashi Tomokuni
Published: October 2023

We classify the subpencils of complete linear systems for the hyperplane sections on K3 surfaces obtained as the complete intersection of a hyperquadric and a hypercubic. The classification is done from three points of view, namely, the type of a general fibre, the base locus and the Horikawa index of the essential member. This classification shows the distinct phenomenons depending on the rank of the hyperquadrics containing the surface.
Stable solutions to double phase problems involving a nonlocal term
Authors: Rahal Belgacem , Le Phuong
Published: October 2023

In this paper, we study weak solutions, possibly unbounded and sign-changing, to the double phase problem
\begin{equation*}
-\text{div} (|\nabla u|^{p-2} \nabla u + w(x)|\nabla u|^{q-2} \nabla u) = \left(\frac{1}{|x|^{N-\mu}}*f|u|^r\right) f(x)|u|^{r-2}u \quad\text{in}\ \mathbb{R}^N,
\end{equation*}
where $q\ge p\ge2$, r > q, $0 \lt \mu \lt N$ and $w,f \in L^1_{\rm loc}(\mathbb{R}^N)$ are two non-negative functions such that $w(x) \le C_1|x|^a$ and $f(x) \ge C_2|x|^b$ for all $|x| \gt R_0$, where $R_0,C_1,C_2 \gt 0$ and $a,b\in\mathbb{R}$. Under some appropriate assumptions on p, q, r, µ, a, b and N, we prove various Liouville-type theorems for weak solutions which are stable or stable outside a compact set of $\mathbb{R}^N$. First, we establish the standard integral estimates via stability property to derive the non-existence results for stable weak solutions. Then, by means of the Pohožaev identity, we deduce the Liouville-type theorem for weak solutions which are stable outside a compact set.
Household Matters: Engendering the Social History of Capitalism
Authors: Boris Eileen , Swinth Kirsten
Published: October 2023

This essay takes up the project of engendering capitalism by turning to the household. It situates a gendered analysis of capitalism within recent histories of capitalism, feminist analyses of social reproduction, histories of family and industrialism, histories of sexuality, and histories of women's labor. It argues that to analyze capitalism from a household perspective clarifies three core elements of capitalist political economy. First, capitalism depended on reproductive and productive labor inside the household, from early industrialization through its most recent incarnations. Second, reproductive labor, historically anchored in the household, has served as a crucial site for development of capitalist labor relations. Third, that intensified commodification of reproductive labor has driven capitalist accumulation as well as capitalist social relations, whether that labor occurs within the household or is located beyond it.
Overlapping Ownership Along the Supply Chain
Authors: Freeman Kayla M.
Published: October 2023

I find overlapping institutional ownership (OIO) in a customer and supplier increases the duration of their supply chain relationship. Results are stronger when vertical holdup is more severe. A quasi-natural experiment around mergers of financial institutions provides causal evidence of OIO improving relationship survival rates. Concurrent with longer-lived relationships, valuations and innovation increase, consistent with OIO effects on relationship longevity being beneficial. I find evidence of OIO strengthening relationships via an internalization channel: With more OIO, partners cooperate more, with the supplier extending more trade credit. Overall, results indicate OIO strengthens vertical relationships by alleviating holdup problems.
Size-dependent predation on juvenile sandfish, Holothuria scabra by seagrass-associated crabs
Authors: Caasi Olivier Josh C. , Gosselin Louis A. , Juinio-Meñez Marie Antonette
Published: October 2023

High mortality of juvenile Holothuria scabra in seagrass nursery areas has been attributed to predation. In this study, laboratory and field experiments were conducted to determine the effect of the size of two seagrass–associated crabs, Thalamita crenata and Dardanus megistos, on the survival of juvenile sandfish at different sizes (1–10 g). Small juvenile sandfish (1–2 g) offered in field trials were more preferred by small Thalamita and large Dardanus. Non-lethal damage caused by both crabs were also evident, indicating differences in the mode of attack and consumption. The incidence of non-lethal wounds in medium and large juveniles in the laboratory indicate higher incidences of unsuccessful attacks by the crabs. Differences in consumption rate may be related to cheliped morphology and handling techniques, and activity patterns affecting encounter rates. Mortality rates of juvenile sandfish due to T. crenata (CW: 4.30–7.05 cm) ranged from 10–43%, while those by D. megistos (SL: 0.90–2.3 cm) was even higher at 34–53% after 24 h trials. This is the first report that a hermit crab D. megistos is a significant predator of juvenile sandfish. Results provide new insights on crab–soft-bodied prey interactions in tropical seagrass areas. These are also important considerations in stock restoration and ocean-based culture. Given that juveniles (≤10 g) are very vulnerable to predation by these common crab species, growing sandfish to larger sizes is essential prior to release in the field.
Employer-provided childcare across the 50 United States: the normative importance of public childcare and female leadership
Authors: Daiger von Gleichen Rosa
Published: October 2023

Employer family policy tends to be conceived as employers’ response to economic pressures, with the relevance of normative factors given comparatively little weight. This study questions this status quo, examining the normative relevance of public childcare and female leadership to employer childcare. Logistic regression analyses are performed on data from the 2016 National Study of Employers (NSE), a representative study of private sector employers in the United States. The findings show that public childcare is relevant for those forms of employer childcare more plausibly explained as the result of employers’ normative as opposed to economic considerations. The findings further suggest that female leaders are highly relevant for employer childcare, but that this significance differs depending on whether the form of employer childcare is more likely of economic versus normative importance to employers. The study provides an empirical contribution in that it is the first to use representative data of the United States to examine the relevance of state-level public childcare and female leadership. Its theoretical contribution is to show that normative explanations for employer childcare provision are likely underestimated in U.S. employer family policy research.
How are policy pilots managed? Findings from the New Rural Cooperative Medical Scheme in China
Authors: Song Yunpeng , Li Yanwei
Published: October 2023

Policy piloting has become a popular form of organization in implementing public policies. However, the current literature surprisingly discusses little about its management. This study investigates how two policy-pilot attributes – ambiguity and compatibility – shape policy-pilot management. To accomplish this, we developed an analytic framework consisting of four management strategies: experimentation, refinement, upscaling, and institutionalization. We chose a representative policy pilot in Chinese health governance, the New Rural Cooperative Medical Scheme, to examine the adoption of these four strategies. Our finding that, at various junctures, the Chinese state adopted these four strategies to manage policy piloting demonstrates the applicability of the analytic framework constructed in this study. This study contributes to the existing public policy literature by providing new insights into policy implementation in temporary organizing settings.
Policymaking in a plural society: the case of human experiments in medicine in Israel
Authors: Neubauer-Shani Michal , Lepicard Etienne
Published: October 2023

Various processes in recent years have brought about trends of polarization within democratic societies, challenging political stability. Against this backdrop, policy patterns that are being adopted regarding controversial issues are significantly affected by these countries’ aspiration to create and maintain a consensus, which may have implications not favoring the public. One such issue is human experiments in medicine (clinical trials), which has been regulated by most countries through primary legislation. As a deeply divided society, Israel has been addressing this issue through regulation and secondary legislation, despite several attempts to have it regulated through primary legislation. This article employs the consociational model alongside Public Choice Theory to explain the adoption of this policy pattern on the issue of human experiments. Based on thematic analysis of semi-structured interviews and existing sources, it sheds light on the normative choice that weighs the merits of primary legislation against the virtues of accommodation and consensus.
No concurrent correlations between parental mental state talk and toddlers’ language abilities
Authors: NYBERG Sandra , DAHLSTRÖM Örjan , VOINIER Daniel , BERGSTRÖM Kerstin , HEIMANN Mikael
Published: October 2023

Mental State Talk (MST) is utterances describing invisible mental aspects. The first aim of this study was to investigate the characteristics of Parental MST and Child MST and their concurrent association in a Swedish population, and the second aim was to relate these MST measures to the children’s general language abilities. Seventy-seven dyads of parents and their 25-month-old toddlers participated. MST was assessed by videotaping the dyads during free-play sessions in a laboratory and general language abilities were based on parental reports. Forty-nine toddlers did not produce MST, while all parents used MST. Child MST was positively associated with vocabulary and grammar. Parental MST was not associated with Child MST nor the children’s general language abilities. In exploratory analyses, Parental MST referred to another than the child was positively correlated with vocabulary and grammar. Further studies are needed to confirm these findings and continue studying MST in different linguistic contexts.
Form and function covariation: Obligation modals in Australian English
Authors: Travis Catherine E. , Torres Cacoullos Rena
Published: October 2023

Shifts in the frequencies of English modals of obligation have been linked to shifts in modal function and changing interpersonal authority. Interpretation of over 2,000 tokens in spontaneous speech data recorded in Sydney, Australia, in the 1970s and 2010s establishes a replicable classification of obligation meanings, based on source of obligation, with a three-way distinction betweenHierarchicalauthority,Generalcircumstances, andPersonalchoice. Competing expressions for these obligation types, besideshave to,have got to, and oldermust, includeshouldand, recently,need to. Two sets of regression analyses provide evidence of covariation of form and function: first, the linguistic and social conditioning of forms, with meaning as one of the predictors; and second, the conditioning of function, with modal form as a predictor.Need torises in real time and so does talk of personal obligation. However, the change in modal function is concomitant with, but independent of, shifting modal forms.
Interpreting David Smith’s Photography Through a Medium-centred Model of Communication
Authors: Wu Weiyi
Published: October 2023

American sculptor David Smith moved fluidly between media to elicit the kind of aesthetic reaction that he believed was unique to and inherent in modern art. As remediation of his sculpture, Smith’s photography attains its own performative power by establishing a new aesthetic relationship with its spectators. This article applies Lars Elleström’s medium-centred model of communication to the analysis of the intermedial quality of David Smith’s photography. By emphasizing the significance of mediality and communication, it offers a new interpretation of the transmutation of modern sculpture as an alternative to modernist aesthetics. In this way, this case study of David Smith’s photography functions as an initiative of expanding the research of intermediality beyond formalistic analysis, by integrating art history with communication and media studies.
The addition of employment support alongside psychological therapy enhances the chance of recovery for clients most at risk of poor clinical outcomes
Authors: Thew Graham R. , Popa Ana , Allsop Claire , Crozier Elaine , Landsberg Josef , Sadler Samantha
Published: October 2023

Background:

Many people achieve positive outcomes from psychological therapies for anxiety and depression. However, not everyone benefits and some may require additional support. Previous studies have examined the demographic and clinical characteristics of people starting treatment and identified a patient profile that is associated with poor clinical outcomes.

Aims:

To examine whether the addition of employment-related support alongside psychological therapy was associated with a greater chance of recovery for clients belonging to this patient profile.

Method:

We analysed 302 clients across three services, who were offered employment-related support alongside psychological therapy. The rate of clinical recovery (falling below clinical thresholds on measures of both anxiety and depression) was compared between individuals who accepted the offer and those who declined, while adjusting for potential confounders.

Results:

Logistic regression showed that receiving employment support was significantly associated with clinical recovery after controlling for baseline anxiety and depression scores, the number of psychological treatment sessions, and other clinical and demographic variables. The odds of recovery were 2.54 times greater if clients received employment support; 47% of clients who received employment support alongside psychological therapy were classified as recovered, compared with 27% of those receiving psychological therapy only.

Conclusions:

Providing employment support alongside therapy may be particularly helpful for clients belonging to this patient profile, who represent approximately 10% of referrals to NHS Talking Therapies for Anxiety and Depression services. Services could consider how to increase the provision and uptake of employment-focused support to enhance clients’ clinical outcomes.
On government spending and income inequality under monopolistic competition
Authors: Chang Juin-Jen , Guo Jang-Ting , Wang Wei-Neng
Published: October 2023

This paper systematically examines the theoretical and quantitative interrelations between government spending and disposable income inequality in a tractable monopolistically competitive Ramsey macroeconomy. Upon an increase in government size, we analytically show that whether the long-run after-tax Gini coefficient rises or falls depends on the sign and magnitude of the wealth/capital inequality effect versus those of the adjusted-labor effect. Under (i) a mild level of productive public expenditure externalities and (ii) a sufficiently high intertemporal elasticity of consumption substitution, our calibrated model is able to generate qualitatively as well as quantitatively consistent income inequality effects of government spending vis-à-vis recent estimation results.
A comparative analysis of nutrition-related assessment criteria and associated nutrition performance scores of food companies across three prominent corporate sustainability assessment tools
Authors: Robinson Ella , Chan Jasmine , O’Hearn Meghan , Mozaffarian Dariush , Sacks Gary
Published: October 2023

Objective:

Corporate sustainability assessment tools are increasingly used to evaluate company performance on environmental, social and governance (ESG) criteria. Given the growing burden of diet-related disease and nutrition-related business risks, it is important to understand the scope of nutrition-related ESG data currently available. This study aimed to compare the nutrition-related assessment criteria and associated food company performance across three prominent assessment tools.

Design:

Key attributes and assessment criteria of two civil society-led and one commercially available corporate sustainability assessment tools were extracted and compared for the year 2021. Company performance scores for twenty-five major food and beverage manufacturers using these three tools were analysed by nutrition domain: ‘Product Portfolio’, ‘Labelling’, ‘Marketing’, ‘Accessibility and Affordability’, ‘Governance and Reporting’, ‘Stakeholder Engagement’ and ‘Employee Health’. To enable comparison between tools, company performance scores were assigned to categories of low (score = 0–25 % score or D), moderately low (25–50 % or C), moderately high (50–75 % or B) and high (75–100 % or A).

Setting:

Global.

Participants:

N/A.

Results:

The tools covered similar nutrition domains; however, there was heterogeneity in the assessment criteria used to evaluate each domain. When applied to assess the performance of twenty-five major food and beverage manufacturers, a median nutrition-related performance score of moderately low or low was observed across all tools. The highest scoring domain was ‘Governance and Reporting’, and the lowest scoring domains were ‘Product Portfolio’ and ‘Accessibility and Affordability’.

Conclusions:

Greater standardisation of the nutrition-related criteria against which food companies are assessed is needed as part of efforts to drive improvements in food company practices.
Disparities in health and nutrition between semi-urban and rural mothers and birth outcomes of their newborns in Bukavu, DR Congo: a baseline assessment
Authors: Beitze Damaris Elisabeth , Kavira Malengera Céline , Barhwamire Kabesha Theophile , Frank Jan , Scherbaum Veronika
Published: October 2023

Aim:

This research aimed to evaluate health and nutritional practices of mothers during pregnancy and birth outcomes of their newborns in Bukavu, Democratic Republic of the Congo (DRC), comparing semi-urban and rural areas.

Background:

Health and nutrition during pregnancy are crucial for adequate development of the fetus. Health care plays an important role but is often poor in rural areas of developing countries.

Methods:

A baseline survey of a nutritional follow-up study was conducted in two semi-urban and one rural hospital in the vicinity of Bukavu, DRC. In total, 471 mother-child pairs were recruited after delivery. Data collection included socio-demographic parameters, nutrition and health measures during pregnancy, and anthropometric parameters. Semi-urban and rural study locations were compared and predictors of birth weight evaluated.

Findings:

Semi-urban and rural mothers differed significantly in nutrition and health practices during pregnancy, as well as birth outcomes. In the rural area, there was a higher rate of newborns with low birth weight (10.7%) and lower rates of antimalarial medication (80.8%), deworming (24.6%), consumption of nutritional supplements (81.5%), and being informed about nutrition by medical staff (32.8%) during pregnancy as well as practicing family planning (3.1%) than in the semi-urban areas (2.7%, 88.6%, 88.3%; 89.3%, 46.5%, and 17.1%, respectively). Birth weight was positively predicted by increasing maternal MUAC, age, and gestational age and negatively by rural location, being primipara, being a farmer, and female newborn sex.

Conclusion:

The findings highlight the importance of strengthening antenatal care activities especially in rural areas in order to ameliorate both maternal and infantile health and ensure appropriate development.
Relational care and epistemic injustice
Authors: Shah Rupal , Ahluwalia Sanjiv , Spicer John
Published: October 2023

The philosophical underpinnings of primary care have been examined from several perspectives in recent years. In two previous articles, we have argued that a relational view of autonomy is better matched to the primary care setting than others, and that view is mainly formed from the descriptors of its practice. Here we develop that analysis further, linking it to other relevant theory: the experience of human suffering and epistemic injustice. We argue that relational care is fundamental to ameliorating epistemic injustice and that relationships are integral to ethical practice, rather than being distinct. We propose that personalised care as described in the NHS Long Term Plan is not possible without addressing epistemic injustice and therefore without reconsidering our existing normative ethical frameworks.
Global Musical Modernisms as Decolonial Method
Authors: LEE GAVIN S. K.
Published: October 2023

This article argues that through historiography, global musical modernisms decolonize Western musical modernism, expanding and bursting the latter's spatial (geographic), vertical (high–low genres), and temporal boundaries. The unsettling of these various boundaries shows how coloniality is the context of, and thoroughly imbricated with, global musical modernisms – and yet the latter has channelled the self-conscious resistance of global music-makers against the colonial condition that characterizes modernity. Examining global musical modernisms both in the real world and in the inter-disciplines, this article addresses material complexities that are elided in purist dichotomous conceptions of resistance and oppression as inhering in different musics and cultures.
Daytime Medium Scale Traveling Ionospheric Disturbances (MSTIDS) Over the Andes Mountains at Equatorial and Low Magnetic Latitudes
Authors: Figueiredo C. A. O. B. , Wrasse C. M. , Vadas S. , Takahashi H. , Otsuka Y. , Nyassor P. K. , Shiokawa K. , Paulino I. , Barros D.
Published: October 2023

We analyze daytime quiet‐time MSTIDs between 2013 and 2015 at the geomagnetic equatorial and low latitude regions of the Chilean and Argentinian Andes using keograms of detrended total electron content (dTEC). The MSTIDs had a higher occurrence rate at geomagnetic equatorial latitudes in the June solstice (winter) and spring (SON). The propagation directions changed with the season: summer (DJF) [southeast, south, southwest, and west], winter (JJA) [north and northeast], and equinoxes [north, northeast, south, southwest, and west]. In addition, the MSTIDs at low latitudes observed between 8:00 and 12:00 UT occur more often during the December solstice and propagate northwestward and northeastward. After 12:00 UT, they are mostly observed in the equinoxes and June solstice. Their predominant propagation directions depend on the season: summer (all directions with a preference for northeastward), autumn (MAM) [north and northeast], winter (north and northeast), and spring (north, northeast, and southwest). The MSTID propagation direction at different latitudes was explained by the location of the possible sources. Besides, we calculated MSTIDs parameters at geomagnetic low latitudes over the Andes Mountains and compared them with those estimated at the geomagnetic equatorial latitudes. We found that the former is smaller on average than the latter. Also, our observations validate recent model results obtained during geomagnetically quiet‐time as well as daytime MSTIDs during winter over the south of South America. These results suggest that secondary or high‐order gravity waves (GWs) from orographic forcing are the most likely source of these MSTIDs.
New O Partial Photoionization Cross Sections Resolve Ionospheric EUV Remote Sensing Issues
Authors: Meier R. R. , Soto Emmaris , Evans J. Scott , Stephan Andrew W. , Tashiro Motomichi
Published: October 2023

The ionospheric O+ number density can be measured remotely during the day by observing its optically thick 83.4 nm radiance. Some ambiguity is present in the process of retrieving the density due to uncertainties in the initial excitation rate. This can be removed by observing a companion optically thin emission at 61.7 nm originating from the O+(3s 2P) state, providing that the ratio of the initial excitation rates is known. Analyses of ICON EUV data using an 83.4/61.7 emission ratio of order 10 result in O+ densities lower by ∼2 than other measurements. Key to relating the two emissions is accurate knowledge of the partial photoionization cross sections and the spectroscopy of O+—the topic of this paper. Up to now, no independent evaluation of the ratio of the 83.4/61.6 emission ratio exists. The recent availability of state‐of‐the‐art calculations of O partial photoionization cross sections into a variety of O+ states presents an opportunity to evaluate the O+(2p4 4P)/O+(3s 2P) ionization rate ratio. We calculate excitation of these parent states of the emissions including both direct and cascade excitation from higher lying O+ energy states. The resulting theoretical prediction gives ratios that range from 13.5 to 12 from solar minimum to maximum, larger than the value of 10 used by the ICON 83.4 and 61.7 nm algorithm. The higher theoretical values for the ratio reconcile the ∼2 discrepancy between simultaneous ICON and other electron density measurements.
Synchrony of Nitrogen Wet Deposition Inputs and Watershed Nitrogen Outputs Using Information Theory
Authors: Murray Desneiges S. , Moges Edom , Larsen Laurel , Shattuck Michelle D. , McDowell William H. , Wymore Adam S.
Published: October 2023

Nitrogen (N) wet deposition chemistry impacts watershed biogeochemical cycling. The timescale and magnitude of (a)synchrony between wet deposition N inputs and watershed N outputs remains unresolved. We quantify deposition‐river N (a)synchrony with transfer entropy (TE), an information theory metric enabling quantification of lag‐dependent feedbacks in a hydrologic system by calculating directional information flow between variables. Synchrony is defined as a significant amount of TE‐calculated reduction in uncertainty of river N from wet deposition N after conditioning for antecedent river N conditions. Using long‐term timeseries of wet deposition and river DON, NO3−, and NH4+ concentrations from the Lamprey River watershed, New Hampshire (USA), we constrain the role of wet deposition N to watershed biogeochemistry. Wet deposition N contributed information to river N at timescales greater than quick‐flow runoff generation, indicating that river N losses are a lagged non‐linear function of hydro‐biogeochemical forcings. River DON received the most information from all three wet deposition N solutes while wet deposition DON and NH4+ contributed the most information to all three river N solutes. Information theoretic algorithms facilitated data‐driven inferences on the hydro‐biogeochemical processes influencing the fate of N wet deposition. For example, signals of mineralization and assimilation at a timescale of 12 to 21‐weeks lag display greater synchrony than nitrification, and we find that N assimilation is a positive lagged function of increasing N wet deposition. Although wet deposition N is not the main driver of river N, it contributes a significant amount of information resolvable at time scales of transport and transformations.
The Role of Bed Morphology and Channel Curvature on the Redistribution of Momentum in a Series of Meander Bends, Pearl River, USA
Authors: Konsoer Kory , Rowley Taylor , Rhoads Bruce
Published: October 2023

Three primary driving factors are responsible for the lateral flux of streamwise momentum within meander bends: topographic steering of the flow related to changes in channel morphology, rapid changes in channel curvature, and curvature‐driven helical motion. While these factors have been studied previously, their relative contributions to the net redistribution of streamwise momentum within a series of consecutive bends have not yet been fully documented. This study explores the relative contributions of these three mechanisms to the redistribution of streamwise momentum using three‐dimensional velocity data obtained along six consecutive meander bends on the Pearl River (Louisiana, USA) for two different discharges. The magnitudes of lateral momentum flux are systematically compared to spatial series of channel width, bed shape, and channel curvature to elucidate the interactions between channel form and flow structure. Results show that the lateral flux of streamwise momentum is primarily driven by topographic steering with values of momentum flux due to curvature‐driven secondary circulation on average an order of magnitude less than values of flux related to topographic steering. The spatial patterns of the lateral flux components show that momentum redistribution due to topographic steering is highest at the entrance to the bend, and momentum redistribution due to secondary circulation is typically highest downstream of the apex. The results of this study emphasize the important role that interaction between process and form plays in dynamics of natural meandering rivers.
Effect of omega-3 fatty acid diet on prostate cancer progression and cholesterol efflux in tumor-associated macrophages—dependence on GPR120
Authors: Liang Pei , Henning Susanne M. , Grogan Tristan , Elashoff David , Said Jonathan , Cohen Pinchas , Aronson William J.
Published: October 2023

Background

Preclinical and clinical translational research supports the role of an ω-3 fatty acid diet for prostate cancer prevention and treatment. The anti-prostate cancer effects of an ω-3 diet require a functional host g-protein coupled receptor 120 (GPR120) but the underlying effects on the tumor microenvironment and host immune system are yet to be elucidated.

Methods

Friend leukemia virus B (FVB) mice received bone marrow from green fluorescent protein (GFP) labeled GPR120 wild-type (WT) or knockout (KO) mice followed by implanting Myc-driven mouse prostate cancer (MycCap) allografts and feeding an ω-3 or ω-6 diet. Tumor associated immune cells were characterized by flow cytometry, and CD206+ tumor infiltrating M2-like macrophages were isolated for gene expression studies. MycCap prostate cancer cell conditioned medium (CM) was used to stimulate murine macrophage cells (RAW264.7) and bone marrow-derived (BMD) macrophages to study the effects of docosahexanoic acid (DHA, fish-derived ω-3 fatty acid) on M2 macrophage function and cholesterol metabolism.

Results

The bone marrow transplantation study showed that an ω-3 as compared to an ω-6 diet inhibited MycCaP allograft tumor growth only in mice receiving GPR120 WT but not GPR120 KO bone marrow. In the ω-3 group, GPR120 WT BMD M2-like macrophages infiltrating the tumor were significantly reduced in number and gene expression of cholesterol transporters Abca1, Abca6, and Abcg1. RAW264.7 murine macrophages and BMDMs exposed to MycCaP cell CM had increased gene expression of cholesterol transporters, depleted cholesterol levels, and were converted to the M2 phenotype. These effects were inhibited by DHA through the GPR120 receptor.

Conclusion

Host bone marrow cells with functional GPR120 are essential for the anticancer effects of dietary ω-3 fatty acids, and a key target of the ω-3 diet are the M2-like CD206+ macrophages. Our preclinical findings provide rationale for clinical trials evaluating ω-3 fatty acids as a potential therapy for prostate cancer through inhibition of GPR120 functional M2-like macrophages.
The E3 ligase TRIM26 suppresses ferroptosis through catalyzing K63-linked ubiquitination of GPX4 in glioma
Authors: Wang Zhangjie , Xia Yuan , Wang Yang , Zhu Ruiqiu , Li Hongbo , Liu Yu , Shen Na
Published: October 2023

The selenium-containing enzyme GPX4 moonlights as a central regulator of ferroptosis, an iron-dependent, nonapoptotic form of regulated cell death caused by lipid peroxidation. Yet, little is known about the mechanisms underlying the regulation of its post-transcriptional modifications. Here, we identify the tripartite motif-containing protein TRIM26 as an E3 ubiquitin ligase of GPX4. TRIM26 directly interacts with GPX4 through its Ring domain and catalyzes the ubiquitination of GPX4 at K107 and K117, which promotes the switch in polyubiquitination of GPX4 from K48 to K63, thus enhancing GPX4 protein stability. Moreover, PLK1-mediated S127 phosphorylation of TRIM26 enhances the interaction between TRIM26 and GPX4. Inhibition of TRIM26 phosphorylation causes a reduction in GPX4 K63-linked polyubiquitination and diminishes GPX4 protein levels in tumor cells. Further investigation revealed that TRIM26 is overexpressed in glioma cells. TRIM26 silencing dramatically impedes ferroptosis resistance and tumorigenesis in glioma in vivo and in vitro. Clinically, TRIM26 expression shows a direct correlation with GPX4 and PLK1 levels in glioma samples and is associated with poor outcome in patients with glioma. Collectively, these findings define the role of GPX4 K63-linked polyubiquitination in ferroptosis and suggest a potential strategy for glioma treatment.