bluuebunny/crossref_metadata_2025 huggingface dataset:
High-power proton accelerators for pulsed spallation neutron sources
Authors: Hotchi Hideaki
Published: October 2021

With the spread of accelerator-driven pulsed spallation neutron sources and increasing need for higher neutron fluxes, the high-power performance of proton accelerators has greatly advanced from a few kilowatts to more than 1 MW in the last four decades. The most important concerns to realize such a high-power beam operation are controlling and minimizing beam loss, which are essential for sustainable beam operation that allows hands-on maintenance. This paper reviews key devices and beam handling techniques for beam loss control employed in the high-power proton accelerators that are currently in operation for pulsed spallation neutron sources, including their operational status and future upgrade plan.
Do adolescents want more autonomy? Testing gender differences in autonomy across STEM
Authors: Modrek Anahid S. , Hass Richard , Kwako Alexander , Sandoval William A.
Published: October 2021

Introduction

A growing body of research has identified gender disparities in STEM education, but data are limited from studies directly comparing autonomy given to autonomy wanted by adolescents, as experienced in classrooms by gender and across course subjects.

Methods

With a sample of US adolescents (n = 540), aged 11–19 and 55% female, we assessed students’ perceived levels of autonomy given, and levels of autonomy wanted, by adapting an autonomy assessment specific to course subjects of math, science, and English. We then employed contrast models testing gender differences of autonomy levels across course subjects of math, science, and English, and controlled for age.

Results

Overall, all adolescents reported getting less autonomy than they want. Within gender, girls reported wanting the most autonomy from science. Between genders, girls reported wanting more autonomy from both math and science, compared to boys. In contrast, girls reported getting more autonomy in English, compared to boys. While we found no developmental differences for reported levels of autonomy given, we did find developmental differences with levels of autonomy wanted, showing significant variability of adolescents wanting more autonomy with age.

Conclusions

Our results suggest a general desire for more autonomy across adolescence, with a desire for more autonomy in STEM more common amongst girls. If adolescents' perceived levels of autonomy vary across STEM and by gender, these effects may extend more broadly to their pursuits of STEM careers. Students’ beliefs of autonomy and self‐concept shape their career interests and academic engagement, a trajectory that warrants concern and further investigation.
Incredible Commitments
Authors: Dayal Anjali Kaushlesh
Published: October 2021

Why do warring parties turn to United Nations peacekeeping and peacemaking even when they think it will fail? Dayal asks why UN peacekeeping survived its early catastrophes in Somalia, Rwanda, and the Balkans, and how this survival should make us reconsider how peacekeeping works. She makes two key arguments: first, she argues the UN's central role in peacemaking and peacekeeping worldwide means UN interventions have structural consequences – what the UN does in one conflict can shift the strategies, outcomes, and options available to negotiating parties in other conflicts. Second, drawing on interviews, archival research, and process-traced peace negotiations in Rwanda and Guatemala, Dayal argues warring parties turn to the UN even when they have little faith in peacekeepers' ability to uphold peace agreements – and even little actual interest in peace – because its involvement in negotiation processes provides vital, unique tactical, symbolic, and post-conflict reconstruction benefits only the UN can offer.
The low acoustic noise and turbulence wind tunnel of the University of Sao Paulo
Authors: Amaral F.R. , Serrano Rico J.C. , Bresci C.S. , Beraldo M.M. , Victorino V.B. , Gennaro E.M. , Medeiros M.A.F.
Published: October 2021

This paper introduces the Low Acoustic Noise and Turbulence (LANT) wind tunnel of the Sao Carlos School of Engineering, University of Sao Paulo (USP-EESC), Brazil. The closed-loop wind tunnel features several devices to improve flow uniformity, reduce swirl, and lower the background acoustic noise and turbulence, enabling stability and aeroacoustic experiments. The design criteria was based on the best practices reported, in particular for low turbulence wind tunnels. Yet, these criteria are conflicting and we discuss the decisions that had to be made and present flow quality results that were achieved. The 16-bladed axial fan with 13-blade stators is driven by a variable-speed electric motor. At the corners, 100 mm dense acoustic foam is installed on the vertical walls, floor and ceiling, and the turning vanes are filled with acoustic-absorbing material. The long settling chamber contains a 3.175 mm mesh hexagonal honeycomb and five fine mesh nylon screens, ending in a 7:1 area ratio short contraction. The 3-m long closed-working section has a$1\times 1\ {\rm m}^2$cross-section area. At 15 m/s the working section wall boundary layer is less than 100 mm thick, providing an area of at least$800\times 800\ \mathrm{mm}^2$where the streamwise flow uniformity was within 1%. In the 10–30 m/s flow speed range, the turbulence intensity ranged from 0.05% to 0.071% and the background acoustic noise level, obtained with an inflow microphone, ranged from 90 and 110 dB. A benchmark experiment on a flat plate boundary layer produced an almost perfect two-dimensional Blasius profile up to$Re_x \approx 2.5 \times 10^6$. A beamforming benchmark experiment on aeroacoustics accurately identified the sound emitted by a cylinder immersed in the flow.
Narrate It Until You Become It
Authors: BORTOLAN ANNA
Published: October 2021

Research in phenomenology and philosophy of psychiatry has suggested that psychopathological disturbances of experience often involve an alteration of one's ‘sense of possibility’, dependent upon the presence of specific ‘existential feelings’ (Ratcliffe 2012). In this paper I provide an extended account of how the engagement with certain narratives can lead to a transformation of one's sense of possibility by eliciting affective experiences that are not consonant with the person's existential feelings. More precisely, I claim that, even when the experience of some types of emotion is generally precluded by a restricted sense of possibility, such emotions may be aroused by particular self-narratives, and I explore how this dynamic can give rise to enduring and wide-ranging affective changes.
Kant and the Second Person
Authors: SCHAAB JANIS DAVID
Published: October 2021

According to Stephen Darwall's second-personal account, moral obligations constitutively involve relations of authority and accountability between persons. Darwall takes this account to lend support to Immanuel Kant's moral theory. Critics object that the second-personal account abandons central tenets of Kant's system. I respond to the three main challenges that critics offer by showing that they rest on misunderstandings of the second-personal account. Properly understood, this account is not only congenial to Kant's moral theory, but also illuminates aspects of that theory which have hitherto received scant attention. In particular, it motivates a fresh perspective on the relationship between respect, persons, and the law.
“This Mine is for the Entire Casamance Coastline”: The Politics of Scale and the Future of the Extractive Frontier in Casamance, Senegal
Authors: Fent Ashley
Published: October 2021

As evidenced by the widespread controversy surrounding an otherwise small-scale mining investment pending in Casamance, Senegal, uncertainty shapes the extension of the extractive frontier. Fent argues that amid this uncertainty, different actors are able to politicize or depoliticize extractive investments through the work of scaling. Opponents cast the project as part of larger-scale, longer-term extraction, linking it with regional narratives. By contrast, state and corporate actors depoliticized the mine by emphasizing its limited extent and downscaling conflict to the local level. This demonstrates the conflictual processes through which extractive frontiers are realized—and resisted—through both space and time.
Anatole Katok
Authors: HASSELBLATT BORIS
Published: October 2021

We outline a personal, professional, and scientific biography of AnatoleKatok.
Three-dimensional interaction between uniform current and a submerged horizontal cylinder in an ice-covered channel
Authors: Yang Y.F. , Wu G.X. , Ren K.
Published: October 2021

The problem of interaction of a uniform current with a submerged horizontal circular cylinder in an ice-covered channel is considered. The fluid flow is described by linearized velocity potential theory and the ice sheet is treated as a thin elastic plate. The potential due to a source or the Green function satisfying all boundary conditions apart from that on the body surface is first derived. This can be used to derive the boundary integral equation for a body of arbitrary shape. It can also be used to obtain the solution due to multipoles by differentiating the Green function with its position directly. For a transverse circular cylinder, through distributing multipoles along its centre line, the velocity potential can be written in an infinite series with unknown coefficients, which can be determined from the impermeable condition on a body surface. A major feature here is that different from the free surface problem, or a channel without the ice sheet cover, this problem is fully three-dimensional because of the constraints along the intersection of the ice sheet with the channel wall. It has been also confirmed that there is an infinite number of critical speeds. Whenever the current speed passes a critical value, the force on the body and wave pattern change rapidly, and two more wave components are generated at the far-field. Extensive results are provided for hydroelastic waves and hydrodynamic forces when the ice sheet is under different edge conditions, and the insight of their physical features is discussed.
Transient Marangoni convection induced by an isothermal sidewall of a rectangular liquid pool
Authors: Chen Enhui , Xu Feng
Published: October 2021

Transient Marangoni convection induced by an isothermal sidewall of a rectangular pool under a zero-gravity condition is studied using scaling analysis. Scaling analysis shows that there exist a number of flow regimes in each evolution scenario, depending on the Marangoni number, the Prandtl number and the aspect ratio. In a typical evolution scenario, a horizontal surface flow and a vertical flow adjacent to the sidewall may appear. Additionally, a number of scaling laws of the velocity and thickness of transient Marangoni convection are obtained. Further, numerical simulation is performed for validation of the selected scaling laws. There exits good agreement between the numerical results and the scaling predictions.
Evidence of preferential sweeping during snow settling in atmospheric turbulence
Authors: Li Jiaqi , Abraham Aliza , Guala Michele , Hong Jiarong
Published: October 2021

We present a field study of snow settling dynamics based on simultaneous measurements of the atmospheric flow field and snow particle trajectories. Specifically, a super-large-scale particle image velocimetry (SLPIV) system using natural snow particles as tracers is deployed to quantify the velocity field and identify vortex structures in a 22 m 

$\times$

 39 m field of view centred 18 m above the ground. Simultaneously, we track individual snow particles in a 3 m 

$\times$

 5 m sample area within the SLPIV using particle tracking velocimetry. The results reveal the direct linkage among vortex structures in atmospheric turbulence, the spatial distribution of snow particle concentration and their settling dynamics. In particular, with snow turbulence interaction at near-critical Stokes number, the settling velocity enhancement of snow particles is multifold, and larger than what has been observed in previous field studies. Super-large-scale particle image velocimetry measurements show a higher concentration of snow particles preferentially located on the downward side of the vortices identified in the atmospheric flow field. Particle tracking velocimetry, performed on high resolution images around the reconstructed vortices, confirms the latter trend and provides statistical evidence of the acceleration of snow particles, as they move toward the downward side of vortices. Overall, the simultaneous multi-scale particle imaging presented here enables us to directly quantify the salient features of preferential sweeping, supporting it as an underlying mechanism of snow settling enhancement in the atmospheric surface layer.
Associations between frequency of yogurt consumption and nutrient intake and diet quality in the United Kingdom
Authors: Zhu Yong , Jain Neha , Holschuh Norton , Smith Jessica
Published: October 2021

Little is known on the association between frequency of yogurt consumption and dietary intake in the United Kingdom (UK). The aim of the present study was to examine associations between frequency of yogurt consumption and dietary outcomes in children (n 1912, age 9⋅6 ± 0⋅1 years, 51 % boys) and adults (n 2064, age 48⋅7 ± 0⋅5 years, 49 % men) using cross-sectional data from the National Diet and Nutrition Survey rolling programme year 7 to year 9 (2014/15–2016/17). The frequency of yogurt consumption was determined by the number of days with yogurt reported in 4-d food diaries and participants were classified as non-eaters, occasional eaters (1–2 d of consumption) or regular eaters (3–4 d of consumption). Dietary outcomes were estimated from food diaries. The frequency of yogurt consumption was positively associated with intake of key vitamins and minerals such as thiamin, riboflavin, vitamin C, potassium, calcium, magnesium, phosphorus and iodine in both children and adults (all P < 0⋅0018), as well as higher intake of total dairy (P < 0⋅0001 for both children and adults). Regular yogurt eaters were more likely to meet or exceed nutrient recommendations for vitamins and minerals such as vitamin A, riboflavin, folate, potassium, calcium, magnesium, zinc and iodine (all P < 0⋅001). Diet quality was positively associated with frequency of yogurt consumption in children (P = 0⋅045) and adults (P < 0⋅001). No association between yogurt consumption and free sugar intake was found (P = 0⋅49 for children and P = 0⋅29 for adults). The study suggests that frequency of yogurt consumption is associated with better dietary intake and diet quality in children and adults in the UK.
Awareness of dehydration state and fluid intake practice among adults population in the Jazan Region of Saudi Arabia, 2019
Authors: Albasheer Osama B. , Hakami Abdullah , Al Faqih Abdullah A. , Akkam Ibrahim , Soraihy Safwan K. , Mathary Ahmad , Alharbi Ali A. , Yaqoub Mohammed , Alotayfi Majed A.
Published: October 2021

Despite the hot climate and high humidity in the Jazan Region of Saudi Arabia, which increases risk for dehydration, no previous studies have assessed awareness of dehydration and fluid intake practice among adults in this region. Therefore, the aim of this cross-sectional study was to determine awareness of the dehydration state and fluid intake practices among 440 adults in the Jazan Region of Saudi Arabia. Out of the total, 51⋅8 % were male and 48⋅2 % were females. Good knowledge of dehydration definition and prevention and recommended minimum water intake was observed in 98, 95 and 75 % of the participants, respectively. Fifty-nine percent of the participants met the minimum daily requirement of 3 l or more per day. The age (95 % CI 1⋅003, 1⋅017, P value = 0⋅006), diabetes (95 % CI 1⋅028, 1⋅459, P value = 0⋅023) and prior hospitalisation due to dehydration (95 % CI 1⋅010, 1⋅378, P value = 0⋅037) were associated with higher water intake. Additional glasses of coffee (95 % CI 1⋅02, 1⋅115, P value = 0⋅004) and juice (95 % CI 1⋅039, 1⋅098, P value < 0⋅001) were associated with more water intake. The participants exhibited good knowledge of dehydration definition, symptoms and consequences. Intake of fluids such as ‘juice and coffee’ enhances more water intake. Although two-thirds of the participants met the recommended daily water intake, still one-third of them did not meet this level. Innovative approaches to enhance healthy drinking are warranted and may include partnering with patients to take an active role in hydration monitoring and increasing communication with the different healthcare providers.
Interrelationship between micronutrients and cardiovascular structure and function in type 2 diabetes
Authors: Walters Grace W. M. , Redman Emma , Gulsin Gaurav S. , Henson Joseph , Argyridou Stavroula , Yates Thomas , Davies Melanie J. , Parke Kelly , McCann Gerry P. , Brady Emer M.
Published: October 2021

Micronutrients are important for normal cardiovascular function. They may play a role in the increased risk of cardiovascular disease observed in people with type 2 diabetes (T2D) and T2D-related heart failure. The aims of this study were to (1) examine micronutrient status in people with T2Dv.healthy controls; (2) assess any changes following a nutritionally complete meal replacement plan (MRP) compared with routine care; (3) determine if any changes were associated with changes in cardiovascular structure/function. This was a secondary analysis of data from a prospective, randomised, open-label, blinded end-point trial of people with T2D, with a nested case–control [NCT02590822]. Anthropometrics, cardiac resonance imaging and fasting blood samples (to quantify vitamins B1, B6, B12, D and C; and iron and ferritin) were collected at baseline and 12 weeks following the MRP or routine care. Comparative data in healthy controls were collected at baseline. A total of eighty-three people with T2D and thirty-six healthy controls were compared at baseline; all had micronutrient status within reference ranges. Vitamin B1was higher (148⋅9v. 131⋅7;P0⋅01) and B6lower (37⋅3v. 52⋅9;P0⋅01) in T2Dv. controls. All thirty participants randomised to routine care and twenty-four to the MRP completed the study. There was an increase in vitamins B1, B6, D and C following the MRP, which were not associated with changes in cardiovascular structure/function. In conclusion, changes in micronutrient status following the MRP were not independently associated with improvements in cardiovascular structure/function in people with T2D.
A NOTE ON OPEN BOOK EMBEDDINGS OF -MANIFOLDS IN
Authors: PANDIT SUHAS , A SELVAKUMAR
Published: October 2021

In this note, we show that given a closed connected oriented
$3$
-manifold M, there exists a knot K in M such that the manifold
$M'$
obtained from M by performing an integer surgery admits an open book decomposition which embeds into the trivial open book of the
$5$
-sphere
$S^5.$
A NOTE ON LARGE VALUES OF
Authors: XIAO XUANXUAN , YANG QIYU
Published: October 2021

In this note, by introducing a new variant of the resonator function, we give an explicit version of the lower bound for
$\log |L(\sigma ,\chi )|$
in the strip
$1/2<\sigma <1$
, which improves the result of Aistleitner et al. [‘On large values of
$L(\sigma ,\chi )$
’, Q. J. Math.70 (2019), 831–848].
Interactions of dietary insulin index and dietary insulin load with brain-derived neurotrophic factor (BDNF) Val66Met polymorphism in relation to cardiometabolic markers in Iranian diabetic patients: a cross-sectional study
Authors: Abaj Faezeh , Rafiee Masoumeh , Koohdani Fariba
Published: October 2021

The progression of cardiometabolic diseases is determined by both genetic and environmental factors. Gene–diet interactions may therefore be important in modulating the risks of developing metabolic diseases. The objectives were to investigate the effect of the interaction between brain-derived neurotrophic factor (BDNF) Val66Met polymorphisms and dietary insulin index (DII) and dietary insulin load (DIL) on cardiometabolic markers among diabetic patients. In this cross-sectional study, blood samples were collected from 667 patients. DIL and DII were defined using a validated FFQ. Genotyping the BDNF Val66Met polymorphism was conducted by the PCR-Restriction fragment length polymorphism (RFLP) method. Interactions between dietary indices and gene variants were evaluated using a generalised linear model. PGF2a concentrations were significantly higher among Val homozygotes than Met-allele carrier. This study revealed that, compared with individuals with the Val/Val genotype, those with the Met/Val or Met/Met genotype had lower BMI (Pinteraction = 0·04), TAG (Pinteraction = 0·04), leptin (Pinteraction = 0·01), LDL (Pinteraction = 0·04) and total cholesterol (Pinteraction = 0·01) when they consumed diets higher on the DIL index. Moreover, the highest quartile of the DIL, compared with the lowest, showed increase in waist circumference (Pinteraction = 0·02) and LDL/HDL (Pinteraction = 0·04) for Val/Val homozygotes compared with Met-allele carriers. BDNF Val66Met variants may interact with DIL and DII, thus be involved in the development of cardiometabolic risk factors. If diabetic patients with Met alleles regulate dietary intakes, they have a protective opportunity to regulate their cardiometabolic markers.
Structure theory and stable rank for C*-algebras of finite higher-rank graphs
Authors: Pask David , Sierakowski Adam , Sims Aidan
Published: October 2021

We study the structure and compute the stable rank of$C^{*}$-algebras of finite higher-rank graphs. We completely determine the stable rank of the$C^{*}$-algebra when the$k$-graph either contains no cycle with an entrance or is cofinal. We also determine exactly which finite, locally convex$k$-graphs yield unital stably finite$C^{*}$-algebras. We give several examples to illustrate our results.
Dynamic changes in energy expenditure in response to underfeeding: a review
Authors: Egan Aoife M , Collins Adam L
Published: October 2021

The observation that 64% of English adults are overweight or obese despite a rising prevalence in weight-loss attempts suggests our understanding of energy balance is fundamentally flawed. Weight-loss is induced through a negative energy balance; however, we typically view weight change as a static function, in that energy intake and energy expenditure are independent variables, resulting in a fixed rate of weight-loss assuming a constant energy deficit. Such static modelling provides the basis for the clinical assumption that a 14644 kJ (3500 kcal) deficit translates to a 1 lb weight-loss. However, this ‘3500 kcal (14644 kJ) rule’ is consistently shown to significantly overestimate weight-loss. Static modelling disregards obligatory changes in energy expenditure associated with the loss of metabolically active tissue, i.e. skeletal muscle. Additionally, it disregards the presence of adaptive thermogenesis, the underfeeding-associated fall in resting energy expenditure beyond that caused by loss of fat-free mass. This metabolic manipulation of energy expenditure is observed from the onset of energy restriction to maintain weight at a genetically pre-determined set point. As a result, the observed magnitude of weight-loss is disproportionally less, followed by earlier weight plateau, despite strict compliance to a dietary intervention. By simulating dynamic changes in energy expenditure associated with underfeeding, mathematical modelling may provide a more accurate method of weight-loss prediction. However, accuracy at an individual level is limited due to difficulty estimating energy requirements, physical activity and dietary intake in free-living individuals. In the present paper, we aim to outline the contribution of dynamic changes in energy expenditure to weight-loss resistance and weight plateau.
Ultrastructural characterization of host–parasite interactions of Plasmodium coatneyi in rhesus macaques
Authors: Lombardini E. D. , Malleret B. , Rungojn A. , Popruk N. , Kaewamatawong T. , Brown A. E. , Turner G. D. H. , Russell B. , Ferguson D. J. P.
Published: October 2021

Plasmodium coatneyi has been proposed as an animal model for human Plasmodium falciparum malaria as it appears to replicate many aspects of pathogenesis and clinical symptomology. As part of the ongoing evaluation of the rhesus macaque model of severe malaria, a detailed ultrastructural analysis of the interaction between the parasite and both the host erythrocytes and the microvasculature was undertaken. Tissue (brain, heart and kidney) from splenectomized rhesus macaques and blood from spleen-intact animals infected with P. coatneyi were examined by electron microscopy. In all three tissues, similar interactions (sequestration) between infected red blood cells (iRBC) and blood vessels were observed with evidence of rosette and auto-agglutinate formation. The iRBCs possessed caveolae similar to P. vivax and knob-like structures similar to P. falciparum. However, the knobs often appeared incompletely formed in the splenectomized animals in contrast to the intact knobs exhibited by spleen intact animals. Plasmodium coatneyi infection in the monkey replicates many of the ultrastructural features particularly associated with P. falciparum in humans and as such supports its use as a suitable animal model. However, the possible effect on host–parasite interactions and the pathogenesis of disease due to the use of splenectomized animals needs to be taken into consideration.
An energy efficiency index for elastic actuators during resonant motion
Authors: Calanca Andrea , Verstraten Tom
Published: October 2021

The energetic advantages of series and parallel elastic actuators have been characterized in the literature considering different elastic systems and different tasks. These characterizations usually determine the energy consumption of a specific system during a specific task and generalize poorly. This paper proposes an energetic characterization of elastic actuators, following an analytical approach, rather than a data-driven one. In particular, this work analyzes the energy consumption of elastic actuators during resonant motion and introduces a novel efficiency index. This index characterizes energy consumption as a function of inherent actuator parameters only, generalizing over the specific tasks. The proposed analysis is validated using simulations and experiments, demonstrating its coherence with analytical results.
Limits to Aggregation and Uncertain Rescues
Authors: Steuwer Bastian
Published: October 2021

Limited aggregation holds that we are only sometimes, not always, permitted to aggregate. Aggregation is permissible only when the harms and benefits are relevant to one another. But how should limited aggregation be extended to cases in which we are uncertain about what will happen? In this article, I provide a challenge to ex post limited aggregation. I reconstruct a precise version of ex post limited aggregation that relies on the notion of ex post claims. However, building a theory of limited aggregation based on ex post claims leads to a dilemma. This shows that ex post limited aggregation is currently far away from being a well-defined alternative, strengthening the case for ex ante limited aggregation.
Dosimetric study of the interplay effect using three-dimensional motion phantom in proton pencil beam scanning treatment of moving thoracic tumours
Authors: Grewal Hardev S. , Ahmad Salahuddin , Jin Hosang
Published: October 2021

Aim:

The dosimetric and clinical advantages offered by implementation of pencil beam scanning (PBS) proton therapy for moving thoracic tumours is hindered by interplay effect. The purpose of this study is to evaluate the impact of large proton beam spot size along with adaptive aperture (AA) and various motion mitigation techniques on the interplay effect for a range of motion amplitudes in a three-dimensional (3D) respiratory motion phantom.

Materials and Methods:

Point doses using ionisation chamber (IC) and planner dose distributions with radiochromic film were compared against the corresponding treatment planning system (TPS) information. A 3D respiratory motion phantom was scanned either for static or 4D computed tomographic (CT) technique for 6-, 10- and 14-mm motion amplitudes in SI direction. For free breathing (FB) treatment, a tumour was contoured on maximum intensity projection scan and an average scan was used for treatment planning. Each FB treatment was delivered with one, three and five volumetric repaintings (VRs). Three phases (CT40–60%) were extracted from the 4D-CT scans of each motion amplitude for the respiratory-gated treatment and were used for the treatment planning and delivery. All treatment plans were made using AA and robustly optimised with 5-mm set-up and 3·5% density uncertainty. A total of 26 treatment plans were delivered to IC and film using static, dynamic and respiratory-gated treatments combinations. A percent dose difference between IC and TPS for the point dose and gamma indices for film–TPS planner dose comparison was used.

Results:

The dose profile of film and TPS for the static phantom matched well, and percent dose difference between IC and TPS was 0·4%. The percent dose difference for all the gated treatments were below 3·0% except 14-mm motion amplitude-gated treatment. The gamma passing rate was more than 95% for film–TPS comparison for all gated treatment for the investigated gamma acceptance criteria. For FB treatments, the percent dose difference for 6-, 10- and 14-mm motion amplitude was 1·4%, −2·7% and −4·1%, respectively. As the number of VR increased, the percent difference between measured and calculated values decreased. The gamma passing rate met the required tolerance for different acceptance criteria except for the 14-mm motion amplitude FB treatment.

Conclusion:

The PBS technique for the FB thoracic treatments up to 10-mm motion amplitude can be implemented with an acceptable accuracy using large proton beam spot size, AA and robust optimisation. The impact of the interplay effect can be reduced with VR and respiratory-gated treatment and extend the treatable tumour motion amplitude.
Galactic traversability: a new concept for extragalactic SETI
Authors: Lacki Brian C.
Published: October 2021

Interstellar travel in the Milky Way is commonly thought to be a long and dangerous enterprise, but are all galaxies so hazardous? I introduce the concept ofgalactic traversabilityto address this question. Stellar populations are one factor in traversability, with higher stellar densities and velocity dispersions aiding rapid spread across a galaxy. The interstellar medium (ISM) is another factor, as gas, dust grains and cosmic rays all pose hazards to starfarers. I review the current understanding of these components in different types of galaxies, and conclude that red quiescent galaxies without star formation have favourable traversability. Compact elliptical galaxies and globular clusters could be ‘super-traversable’, because stars are packed tightly together and there are minimal ISM hazards. Overall, if the ISM is the major hindrance to interstellar travel, galactic traversability increases with cosmic time as gas fractions and star formation decline. Traversability is a consideration in extragalactic surveys for the Search for Extraterrestrial Intelligence (SETI).
What Do We Know About Black and Minority Ethnic (BAME) Participation in UK Higher Education?
Authors: Arday Jason , Branchu Charlotte , Boliver Vikki
Published: October 2021

Here, we offer a synthesis of recent evidence and new developments in relation to three broad aspects of Black and minority ethnic (BAME) students’ participation in UK higher education (HE). First, we examine recent trends in ethnic group differences in rates of access to, success within, and positive destinations beyond HE. Secondly, we examine the nature of UK universities as exclusionary spaces which marginalise BAME students in a myriad of ways, not least through curricula that centre Whiteness. Finally, we consider the impact of the marginalisation of BAME students on mental health. We argue that progress towards race equality in each domain has been hampered by white-centric discourses which continue to identify BAME students and staff as ‘other’. We highlight the important roles that academic communities and HE policy-makers have to play in advancing ethnic equality in UK universities.
Case Study: Enhancing the Learning Experiences of BAME Students at a University: The University Role
Authors: Lim Hyun-Joo
Published: October 2021

This case study examines the role of a university and academics in improving the learning experiences of BAME students, drawing on student-led participatory action research with Social Sciences BAME students at Bournemouth University (BU henceforth) between 2018-2020. The paper seeks to illuminate the critical role of the university by focusing on three inter-related facets at macro, meso and micro levels (Bronfenbrenner, 1979): financial and temporal/spatial support for students; collaboration between academic staff at departmental and faculty levels to address any issues that arose from student meetings; and its consequential impact on student wellbeing, self-worth and their overall engagement in their learning. I argue that to achieve the utmost improvement in BAME students’ learning experiences, these different levels of the support system need to work together. I further argue that maximising the potentiality of ‘ethnic capital’ (Modood, 2004) could be a powerful resource that could bring significant changes to the experiences of BAME students and subsequent outcomes of their learning during and after university.
A critical account of Ius Constitutionale Commune in Latin America: An intellectual map of contemporary Latin American constitutionalism
Authors: Coddou Mc Manus Alberto
Published: October 2021

Ius Constitutionale Commune in Latin America (ICCAL) is an academic endeavour that attempts to provide an account of the original Latin American path of transformative constitutionalism, comprising elements from national, transnational and international legal orders, and where the law is placed at the service of the normative trinity of constitutionalism, namely the rule of law, democracy and human rights. In this regard, ICCAL speaks of an Inter-American law that represents a new legal phenomenon, in a region where constitutionalist ideas have allegedly claimed new traction. In this article, I develop two main critiques that can be deemed challenges for an academic project that is still ‘under construction’, and provide an intellectual map of Latin American constitutionalism that could address these critiques and serve as a roadmap for studying potential Latin American contributions to debates around global constitutionalism.
Domestic autonomy and environmental international non-governmental organizations: a cross-national analysis of forest loss
Authors: Sommer Jamie M.
Published: October 2021

Non-technical Summary

Nations across the world are concerned with environmental issues like forest loss. The majority of nations acknowledge the importance of reducing forest loss, and make commitments to do so. However, researchers often find that despite these commitments, and the work of non-governmental organizations, in many nations, forest loss is not declining. This research argues that institutional capacity, specifically a nations domestic autonomy may help explain the ineffectiveness of environmental international non-governmental organizations (EINGOs) at reducing forest loss. Specifically, I argue that nations with stronger domestic autonomy, measured as the extent to which a nation is free of the direct control of external political actors, improves the effectiveness of EINGOs at reaching their goals of reducing forest loss due to an autonomous state's relative strength and ability to integrate their version of environmentalism or reinterpret existing norms of environmentalism into EINGO ideologies and activities.

Technical Summary

Previous research finds that environmental international non-governmental organizations (EINGOs) tend to have differential impacts on environmental factors cross-nationally, such as forest loss. More recent work argues that decoupling between stated environmental norms and actual environmental outcomes may be the result of a lack of institutional capacity. Using ordinary least squares regression for 91 low- and middle-income nations from 2001 to 2014, I find that EINGOs reduce forest loss more in nations with higher rather than lower levels of domestic autonomy. However, I find that EINGOs and domestic autonomy on their own do not significantly predict forest loss.

Social media summary

This research argues that a nations domestic autonomy may help explain the ineffectiveness EINGOs at reducing forest loss.
‘Atlantic’ and ‘Dakota Pearl’ chipping potato responses to glyphosate and dicamba simulated drift
Authors: Brooke Matthew J. , Stenger John , Svyantek Andrej W. , Auwarter Collin , Hatterman-Valenti Harlene
Published: October 2021

Field trials were conducted to determine the effects of glyphosate and/or dicamba simulated drift rates on chipping potatoes (Solanum tuberosum L.) ‘Atlantic’ and ‘Dakota Pearl.’ Sublethal herbicide rates were applied at the tuber initiation stage and consisted of dicamba at 99 g ae ha−1 or glyphosate at 197 g ae ha−1 applied alone or the combinations of dicamba at 20 or 99 g ae ha−1 and glyphosate at 40 or 197 g ae ha−1, respectively. At 7 days after treatment (DAT), the high spray combination of glyphosate plus dicamba resulted in the greatest plant damage (28%). Plant injury from plants treated with the low combination of glyphosate plus dicamba did not differ from the nontreated control. At 21 DAT, visible injury increased to 40% for plants treated with the high combination of glyphosate plus dicamba. Total yield suggested that dicamba and glyphosate caused similar yield reductions as plants that received glyphosate at 197 g ha−1 or dicamba at 99 g ha−1 had lower total yields compared to the nontreated and plants that received the combination of glyphosate (197 g ha−1) and dicamba (99 g ha−1) had lower total yields compared to plants that received either herbicide alone. However, ‘Dakota Pearl’ plants were more sensitive to glyphosate at 197 g ha−1 than were ‘Atlantic’ plants, causing the interaction for most tuber grades. Tuber specific gravity was lower for plants that received glyphosate at 197 g ha−1, dicamba at 99 g ha−1, or this combination, but this reduction would not prevent chip processing. Results reinforce the need for diligence when applying these herbicides in proximity to a susceptible crop, such as chipping potatoes, and the need to thoroughly clean sprayers before application to a sensitive crop.
Emergence and early growth of multiple herbicide–resistant and -susceptible late watergrass (Echinochloa phyllopogon)
Authors: Brim-DeForest Whitney B. , Al-Khatib Kassim , Fischer Albert J.
Published: October 2021

Late watergrass is a competitive weed of rice that is well adapted to both aerobic and anaerobic environments. Cultural controls such as a stale-seedbed and alternating from wet- to dry-seeding have been proposed as management options. However, the effects of these systems on its emergence and early growth are unknown. The objective of this study was to modify a previously developed population-based threshold model (PBTM) to predict emergence and early growth under field conditions. In 2013, a series of experiments were conducted at the California Rice Experiment Station (CRES) in Biggs, CA, to evaluate emergence and early growth of multiple herbicide–resistant and -susceptible late watergrass at four burial depths (0.5, 2, 4, and 6 cm) under three irrigation regimes: continuously flooded (CF), daily flush (DF), and intermittent flush (IF). Resistant plants emerged at a significantly higher rate under the IF treatment (P < 0.05). Both biotypes showed decreasing emergence with increasing depth, and no plants emerged from the 4- or 6-cm depths in the CF treatment. Using the Gompertz growth curve, resistant plants had greater predicted growth rates (k), lower predicted maximum heights (hmax), and a shorter time to predicted maximum growth rate (tm) than susceptible plants under the CF and DF treatments. Under the IF treatment, the susceptible plants had greater k, lower hmax, and shorter time to predicted tm. Information about burial depth and irrigation was incorporated into a previously developed PBTM for late watergrass, and validated at the CRES in a field with a susceptible late watergrass population in 2013 and 2014, under two irrigation systems, CF and IF. Model fit was best in the CF treatments (average Akaike information criteria [AIC] = 199.05) compared to the IF treatments (average AIC = 208.6).
Constraining Aerosol Phase Function Using Dual‐View Geostationary Satellites
Authors: Bian Qijing , Kreidenweis Sonia , Chiu J. Christine , Miller Steven D. , Xu Xiaoguang , Wang Jun , Kahn Ralph A. , Limbacher James A. , Remer Lorraine A. , Levy Robert C.
Published: October 2021

Passive satellite observations play an important role in monitoring global aerosol properties and helping quantify aerosol radiative forcing in the climate system. The quality of aerosol retrievals from the satellite platform relies on well‐calibrated radiance measurements from multiple spectral bands, and the availability of appropriate particle optical models. Inaccurate scattering phase function assumptions can introduce large retrieval errors. The high‐spatial resolution, dual‐view observations from the advanced baseline imagers onboard the two most recent geostationary operational environmental satellites (GOES), East and West, provide a unique opportunity to better constrain the aerosol phase function. Using dual GOES reflectance measurements for a dust event in the Gulf of Mexico in 2019, we demonstrate how a first‐guess phase function can be reconstructed by considering the variations in observed scattering angles throughout the day. Using the reconstructed phase function, aerosol optical depth retrievals from the two satellites are self‐consistent and agree well with surface‐based optical depth estimates. We evaluate our methodology and reconstructed phase function against independent retrievals made from low‐Earth‐orbit multi‐angle observations for a different dust event in 2020. Our new aerosol optical depth retrievals have a root‐mean‐square‐difference of 0.019–0.047. Furthermore, the retrievals between the two geostationary satellites for this case agree within about 0.059 ± 0.072, as compared to larger discrepancies between the operational GOES products at times, which do not employ the dual‐view technique.
Low‐Level Jet Climatology of China Derived From Long‐Term Radiosonde Observations
Authors: Yan Yan , Cai Xuhui , Wang Xuesong , Miao Yucong , Song Yu
Published: October 2021

Low‐level jets (LLJs) play important roles in the transport of heat, energy, moisture, and air pollutants. The climatic characteristics of the LLJ over China remain poorly investigated due to the lack of long‐term appropriate measurements. In this study, we obtained a climatology of LLJs over China using newly available, long‐term radiosonde observations from 2011 to 2017. We identified six regions in China with high‐frequency LLJs, which are centered in the Western Inner Mongolia, Yungui Plateau, and Huaihe River Basin, as well as Tarim Basin, Southeast Coast and Northeast Plain. The LLJ occurrence frequency ranged from 26.8% to 33.5%, with clear seasonal variation. LLJs were most frequent in spring and autumn in eastern China, in spring and summer in northwest China, and in autumn and winter along the Southeast Coast. LLJs were associated with stronger southwesterly winds on the Northeast Plain (∼17.0 m s−1), but with weak northeasterly winds in the Tarim Basin and Southeast Coast (∼14 m s−1). Most LLJs occurred at the heights of under the 500 m above the ground level excluding those on the Yungui Plateau. Seasonal changes in LLJ wind direction and height were observed in south China, i.e., higher southwesterly LLJs in summer and lower northeasterly LLJs in other seasons, which is attributed to seasonal variation in the summer and winter monsoons. The findings of this study will contribute to a better understanding of the development and effects of LLJs over China.
Seasonal and Spatial Variability of Dissolved Carbon Concentration and Composition in Lake Michigan Tributaries
Authors: Berg Stephanie M. , Mooney Robert J. , McConville Megan B. , McIntyre Peter B. , Remucal Christina K.
Published: October 2021

Dissolved organic matter (DOM) is a complex mixture of many compounds and its composition dictates numerous reactions in the environment. Large lakes and marine coastlines receive DOM from watersheds that differ widely in their land cover, with potential implications for both the quantity and composition of carbon inputs. Seasonal variation in DOM quantity and composition may also differ among tributaries and be mediated by land cover. Here, we quantify spatially (i.e., among tributary) and seasonal variation in DOM concentration, DOM composition based on ultraviolet‐visible spectroscopy, and alkalinity across 101 tributaries of Lake Michigan, one of the world's largest lakes, using a synoptic sampling approach. Wetland land cover has the largest effect on DOM, producing high concentrations of DOM that are more aromatic and larger in apparent molecular weight. Seasonal variation is also pronounced, with concentrations and aromaticity of DOM peaking in fall across most tributaries. Watershed lithology and land cover both affect alkalinity, with higher values associated with the geography of carbonate bedrock and urbanized watersheds. Watershed land cover has a larger effect than season on all organic carbon parameters. However, seasonal variation is especially important for DOM composition. This disparity suggests that the environmental processing of DOM within river channels mediates its composition more than its concentrations. Considering the wide range of land cover and lithology around Lake Michigan and other large water bodies, accounting for both spatial and seasonal dynamics is essential for understanding controls on DOM delivery.