bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fluid–structure resonance in spanwise-flexible flapping wings
Authors: Martínez-Muriel C. , Arranz G. , García-Villalba M. , Flores O. 
Published: May 2023

We report direct numerical simulations of the flow around a spanwise-flexible wing in forward flight. The simulations were performed at$Re=1000$for wings of aspect ratio 2 and 4 undergoing a heaving and pitching motion at Strouhal number$St_c\approx 0.5$. We have varied the effective stiffness of the wing$\varPi _1$while keeping the effective inertia constant,$\varPi _0=0.1$. It has been found that there is an optimal aerodynamic performance of the wing linked to a damped resonance phenomenon, that occurs when the imposed frequency of oscillation approaches the first natural frequency of the structure in the fluid,$\omega _{n,f}/\omega \approx 1$. In that situation, the time-averaged thrust is maximum, increasing by factor 2 with respect to the rigid case with an increase in propulsive efficiency of approximately 15 %. This enhanced aerodynamic performance results from the combination of larger effective angles of attack of the outboard wing sections and a delayed development of the leading edge vortex. With increasing flexibility beyond the resonant frequency, the aerodynamic performance drops significantly, in terms of both thrust production and propulsive efficiency. The cause of this drop lies in the increasing phase lag between the deflection of the wing and the heaving/pitching motion, which results in weaker leading edge vortices, negative effective angles of attack in the outboard sections of the wing, and drag generation in the first half of the stroke. Our results also show that flexible wings with the same$\omega _{n,f}/\omega$but different aspect ratio have the same aerodynamic performance, emphasizing the importance of the structural properties of the wing for its aerodynamic performance.
The winner takes it all but one
Authors: Deijfen Maria , van der Hofstad Remco , Sfragara Matteo 
Published: May 2023

AbstractWe study competing first passage percolation on graphs generated by the configuration model with infinite-mean degrees. Initially, two uniformly chosen vertices are infected with a type 1 and type 2 infection, respectively, and the infection then spreads via nearest neighbors in the graph. The time it takes for the type 1 (resp. 2) infection to traverse an edge e is given by a random variable
$X_1(e)$
(resp.
$X_2(e)$
) and, if the vertex at the other end of the edge is still uninfected, it then becomes type 1 (resp. 2) infected and immune to the other type. Assuming that the degrees follow a power-law distribution with exponent
$\tau \in (1,2)$
, we show that with high probability as the number of vertices tends to infinity, one of the infection types occupies all vertices except for the starting point of the other type. Moreover, both infections have a positive probability of winning regardless of the passage-time distribution. The result is also shown to hold for the erased configuration model, where self-loops are erased and multiple edges are merged, and when the degrees are conditioned to be smaller than
$n^\alpha$
for some
$\alpha\gt 0$
.
Formas, tecnología y estilos de la cerámica formativa del sitio Corral Grande 1 (2400-1100 años aP), Antofagasta de la Sierra, Argentina
Authors: Casanova Menéndez Martín T. , Pérez Martina Inés , Grant Jennifer L. 
Published: May 2023

ResumenSe presentan los resultados del análisis tecnológico, morfológico y estilístico de una muestra cerámica hallada en estratigrafía en una estructura del sitio Corral Grande 1, asignada al período Formativo regional (2400-1100 años aP), en Antofagasta de la Sierra (provincia de Catamarca, Argentina), Andes meridionales. El objetivo del estudio fue caracterizar distintos aspectos de la cerámica para explorar las potenciales diferencias funcionales de las vasijas en el marco de las actividades agropastoriles desarrolladas en el sitio, los patrones de movilidad y el uso del espacio en la región. Los análisis permitieron identificar una alta variabilidad de estilos tecnológicos en el total del conjunto, e inferir que las vasijas pudieron elaborarse para funciones de almacenaje de productos agrícolas, de cocción y servicio de alimentos. Los tiestos más pequeños y livianos pudieron transportarse en el marco de actividades de pastoreo y caza de camélidos. Las comparaciones a nivel regional evidenciaron similitudes tecnológicas y estilísticas con la cerámica de otros asentamientos, y características decorativas que indican la integración del sitio a escala regional e interregional.
Nationalism and National Identity in North America
Authors: Byrd Dillon P. 
Published: May 2023

AbstractThe study of nationalism in North America has focused heavily on national identity. Much of the scholarship in the region indicates that most individuals define their respective national identities as attainable and inclusive. In contrast to these findings, other evidence from nationalism and ethnic politics scholarship in North America suggests a strong racial link to national understandings. Focusing on national identity research in North America, primarily the United States, but also findings from Canada and Mexico, I try to address the connection between national identity, its political effects, and the boundaries of national identity content. This article identifies important findings from research in North America and proposes that scholars look beyond the current research to study national development – understood both historically and through the study of individuals’ constructive deployment of nationalism in everyday life.
Maternal nutrition during mid-pregnancy and children’s body composition at 7 years of age in the SELMA study
Authors: Svensson Katherine , Gennings Chris , Hagenäs Lars , Wolk Alicja , Håkansson Niclas , Wikström Sverre , Bornehag Carl-Gustaf 
Published: May 2023

AbstractOptimal nutrition during pregnancy is vital for both maternal and child health. Our objective was to explore if prenatal diet is associated with children’s height and body fat. Nutrient intake was assessed through a FFQ from 808 pregnant women and summarised to a nutrition index, ‘My Nutrition Index’ (MNI). The association with children’s height and body fat (bioimpedance) was assessed with linear regression models. Secondary analysis was performed with BMI, trunk fat and skinfolds. Overall, higher MNI score was associated with greater height (β = 0·47; (95 % CI 0·00, 0·94), among both sexes. Among boys, higher MNI was associated with 0·15 higher BMI z-scores, 0·12 body fat z-scores, 0·11 trunk fat z-scores, and larger triceps, and triceps + subscapular skinfolds (β = 0·05 and β = 0·06; on the log2 scale) (P-value < 0·05). Among girls, the opposite associations were found with 0·12 lower trunk fat z-scores, and smaller subscapular and suprailiac skinfolds (β = −0·07 and β = −0·10; on the log2 scale) (P-value < 0·05). For skinfold measures, this would represent a ± 1·0 millimetres difference. Unexpectedly, a prenatal diet in line with recommended nutrient intake was associated with higher measures of body fat for boys and opposite to girls at a pre-pubertal stage of development.
A novel approach to place an adult-size stent to treat coarctation of the aorta using small introducers: “Nijres technique”
Authors: Mohammad Nijres Bassel , Carr Kaitlin , Aldoss Osamah 
Published: May 2023

AbstractAortic arch stent placement in young children is a medical dilemma. This is attributed to the critical lack of commercially available stents that can be delivered through small sheaths and yet have the potential to be dilated to the adult-size aorta. Here in, we describe an innovative first-in-human technique that allows for overcoming the aforementioned challenges. A Palmaz Genesis XD stent was placed to treat coarctation of the aorta in two young children through small-bore sheaths.
Study on the influence mechanism of adoption of smart agriculture technology behavior
Authors: Li Jingjin , Liu Guoyong , Chen Yulan , Li Rongyao 
Published: May 2023

AbstractSmart agricultural (SA) technology has become a technological support for modern agriculture. By exploring the decision-making process and psychological motivation of farmers in adopting SA technology, it is conducive to achieving the popularisation of SA technology and promoting the modernisation of agriculture. Based on microscopic research data, a Structural Equation Model (SEM) is used to analyse the influencing factors and extent of cotton farmers’ adoption of SA technologies, using Deconstructive Theory of Planned Behavior (DTPB) as the analytical framework. This was combined with in-depth interviews to further reveal the motivations and influencing mechanisms of cotton farmers’ adoption of SA technologies. The results show that under the behavioural belief dimension, cotton farmers value the positive effect of perceived usefulness even though the risk of the technology itself has a dampening effect on adoption intentions. Under the normative belief dimension, superior influence influenced the willingness to adopt SA technologies to a greater extent than peer influence. Under the control belief dimension, factors such as self-efficacy and information channels influence willingness to adopt technology and behaviour. In addition, behavioural attitudes, subjective norms, and perceived behavioural control all contribute to cotton farmers’ willingness to adopt SA technologies, and can also influence behaviour directly or indirectly through willingness to adopt. Policy and technology satisfaction positively moderate the transition from willingness to behaviour. Therefore, preferential policies are proposed to reduce the cost of adopting SA technologies; to continuously improve the level of SA technologies; to establish SA technology test plots to provide a reference base; and to increase knowledge training on SA and expand access to information.
Unprecedented recent regional increase in organic carbon and lithogenic fluxes in high altitude Pyrenean lakes
Authors: Vicente de Vera García Alejandra , Mata-Campo María Pilar , Pla Sergi , Vicente Eduardo , Prego Ricardo , Frugone-Álvarez Matías , Polanco-Martínez Josué , Galofré Marcel , Valero-Garcés Blas Lorenzo 
Published: May 2023

AbstractWe have conducted a monitoring survey and paleolimnological study of a W-E transect of six high altitude lakes (1870–2630 m asl) in the western and central Pyrenees (Spain) to evaluate the regional response to current global change in high altitude Mediterranean mountains. The reconstructed Total Organic Carbon (TOCflux) and lithogenic (Lflux) fluxes during the last 1200 years show the expected variability as lakes differ in altitude, geological and climate settings, limnological properties and human impact history. However, all show unique patterns after 1850 CE, particularly during the Great Acceleration (after 1950 CE). Recent Lflux increase could be related to higher erodibility by rainfall and run-off during the longer snow-free season in the Pyrenees. In all sites, higher TOCflux and geochemical (lower δ13COM, lower C/N) and biological (diatom assemblages) signatures since 1950 CE suggest an increase in algal productivity, likely favored by warmer temperatures and higher nutrient deposition. These recent, unprecedented Lflux and TOCflux increases, in spite of their diverse history and limnological properties of the lakes, demonstrate the regional impact of the Great Acceleration not only in the ecological dynamics of alpine lakes but also in the hydrological cycle in high altitude mountain watersheds.
Manipulation of light spectrum is an effective tool to regulate biochemical traits and gene expression in lettuce under different replacement methods of nutrient solution
Authors: Soufi Hamid Reza , Roosta Hamid Reza , Stępień Piotr , Malekzadeh Khalil , Hamidpour Mohsen 
Published: May 2023

AbstractThe use of light-emitting diode (LED) technology represents a promising approach to improve plant growth and metabolic activities. The aim of this study was to investigate the effect of different light spectra: red (656 nm), blue (450 nm), red/blue (3:1), and white (peak at 449 nm) on biochemical properties, photosynthesis and gene expression in two lettuce cultivars (Lollo Rossa and Lollo Bionda) grown under different methods of nutrient solution replacement in hydroponics. Complete replacement and EC-based replacement of nutrient solution increased content of proline and soluble sugars and activity of antioxidant enzymes (CAT, GPX and SOD) under the red/blue LED and red LED light treatments in both cultivars. In addition, the red/blue and the monochromatic red light increased the soluble protein content and the antioxidant activity in the Lollo Rosa cultivar under the replacement method according to the needs of the plant. An increase in flavonoid content in the EC-based method in the Lollo Rosa variety treated with a combination of red and blue light was also observed. The red/blue light had the greatest induction effect on anthocyanin content, expression of the UFGT, CHS, and Rubisco small subunit genes, and the net photosynthetic rate. Data presented here will directly contribute to the development of nutrient solution and LED spectrum management strategies to significantly improve plant growth and metabolism, while avoiding water and nutrient waste, and environmental pollution.
Estimated dietary intake of polyphenols from cereal foods and associated lifestyle and demographic factors in the Melbourne Collaborative Cohort Study
Authors: Vingrys Kristina , Mathai Michael L. , Apostolopoulos Vasso , Bassett Julie K. , de Courten Maximilian , Stojanovska Lily , Millar Lynne , Giles Graham G. , Milne Roger L. , Hodge Allison M. , McAinch Andrew J. 
Published: May 2023

AbstractCereal foods are consumed globally and are important sources of polyphenols with potential health benefits, yet dietary intakes are unclear. We aimed to calculate the dietary intakes of polyphenols from cereal foods in the Melbourne Collaborative Cohort Study (MCCS), and describe intakes by demographic and lifestyle factors. We estimated intakes of alkylresorcinols, lignans and phenolic acids in n = 39,892 eligible MCCS participants, using baseline dietary data (1990–1994) from a 121-item FFQ containing 17 cereal foods, matched to a polyphenol database developed from published literature and Phenol-Explorer Database. Intakes were estimated within groups according to lifestyle and demographic factors. The median (25th–75th percentile) intake of total polyphenols from cereal foods was 86.9 mg/day (51.4–155.8). The most consumed compounds were phenolic acids, with a median intake of 67.1 mg (39.5–118.8), followed by alkylresorcinols of 19.7 mg (10.8–34.6). Lignans made the smallest contribution of 0.50 mg (0.13–0.87). Higher polyphenol intakes were associated with higher relative socio-economic advantage and prudent lifestyles, including lower body mass index (BMI), non-smoking and higher physical activity scores. The findings based on polyphenol data specifically matched to the FFQ provide new information on intakes of cereal polyphenols, and how they might vary according to lifestyle and demographic factors.
Efficient utilization of red mud waste via stepwise leaching to obtain α-hematite and mesoporous γ-alumina
Authors: Karimi Zahra , Rahbar-Kelishami Ahmad 
Published: May 2023

AbstractUtilizing the red mud sustainably is now a challenging issue. Red mud due to its wide production, presence of some radioactive elements, high alkalinity, and salinity, has a dramatic potential to contaminate soil and groundwater. Notwithstanding its drawbacks, Red mud consists several elements, including Ca, Al, Ti, Si, and Fe, in various mineral forms. In this study, stepwise leaching was applied as a proper method to separate and purify the main valuable elements using available and affordable HCl. The pre-leaching step under optimized conditions using HCl (0.2 M) at room temperature for 2 h removed 89% of the calcium content from red mud. To selectively remove the solid silica, the residue was treated with concentrated HCl (3.0 M, L/S of 20 mL/g) at 95 °C, resulting in the dissolution of iron and aluminum content with up to 90% efficiency. After precipitation of the Fe3+ and Al3+, they were characterized using FT-IR, BET, EDS, XRD, SEM and TEM monographs, confirming the formation of nanosized hematite (α-Fe2O3) and mesoporous gamma alumina (γ-Al2O3). Consequently, inexpensive red mud was converted into highly valuable nano-sized metal oxides using simple, sustainable techniques and cheap reagents. Moreover, this technique generates the lowest amounts of waste during the leaching process and all reagents can be recycled for further uses, making this method a sustainable utilization.
Analytical prediction method of power system frequency deviation under uncertain power fluctuations
Authors: Zhu Lixuan , Ju Ping , Yu Yiping 
Published: May 2023

AbstractIn modern power systems, the impact of random power sources and loads on power systems is increasing, resulting in threatened system frequency security. However, traditional methods are often not comprehensive in modelling randomness, and there is no analytical method to assess the frequency response of power systems under uncertain power fluctuations. Here, the power fluctuation in a power system is regarded as an interval random quantity. An analytical prediction method of the power system frequency deviation under uncertain power fluctuation is proposed. Through further deduction, the allowable range of power fluctuation under the premise of secure frequency deviation can also be defined, which provides a reference for frequency security and accident prevention in power systems. Numerical simulations with the model of the East China Power Grid demonstrate that the proposed analytical method can delimit the response interval of system frequency deviation well, and the backstepping calculation can also delimit the allowable range of power fluctuation to ensure the secure operation of the system.
Evaluation of light-element reactions in the resolved resonance region
Authors: Dimitriou Paraskevi , Chen Zhenpeng , J deBoer Richard. , Hale Gerald M. , Kunieda Satoshi , Leeb Helmut , Paris Mark , Pigni Marco T. , Srdinko Thomas , Tamagno Pierre , Thompson Ian J. 
Published: May 2023

Light-element reactions at low energies in the resolved resonance region are important for a range of applications in basic and applied sciences including nuclear reactors, nonproliferation, cultural heritage, forensics and environmental control, rare event investigations and nuclear astrophysics.
In this paper, we report on an effort to evaluate charged-particle cross sections in the resolved resonance region and produce evaluated nuclear data files for further processing and inclusion in evaluated data libraries. We discuss the open issues in R-matrix calculations as we extend to higher energies, such as dealing with the rapidly growing number of open channels and merging with the regime of smooth cross sections described by the statistical model, and present attempts to address these issues in neutron-induced reactions relevant to nuclear reactor applications.
JRC MONNET – the intense fast-neutron source for fundamental and application-driven research
Authors: Fontana Cristiano Lino , Cédric Bonaldi , Geerts Wouter , Martinez Miguel Macías , Vidali Marzio , Oberstedt Stephan 
Published: May 2023

MONNET is a fast-neutron source based on a 3.5 MV tandem accelerator, located at the Geel (BE) site of the Joint esearch Centre. It became operational in 2020. MONNET may deliver intense neutron beams in the energy range from 30 keV to 10.1 MeV and from 12.8 MeV to 24 MeV. Neutrons are generated by means of nuclear reactions in the target material (e.g. protons or deuterons on lithium-7, tritium or deuterium targets). MONNET delivers a neutron flux of up to 109 n/sr/s, depending on the producing reaction and the neutron energy. Neutron beams are essentially mono-energetic (∆En/En < 6% with En > 300 keV). The accelerator may also be used with proton and deuteron beams. Alpha beams will be offered soon. Photon beams are possible and presently under investigation.
The research program ranges from cross section measurements, e.g. (n, f), (n, p), (n, α) as well as (p, p′), (p, n) and (p, γ), nuclear fission research, material studies (e.g. radiation-induced damage), to the investigation of advanced methods in nuclear technologies, safety and security. The MONNET neutron source offers beamtime to external user within the JRC EUFRAT Open Access program. Proposal evaluation by an independent panel is taking place up to two times per year.
Nuklearmedizinische Ultraschall-Fusionsbildgebung – Klinische Möglichkeiten und derzeitige Limitationen
Authors: Gühne Falk , Seifert Philipp , Freesmeyer Martin , Winkens Thomas 
Published: May 2023

ZusammenfassungDie nuklearmedizinische Ultraschall-Fusionsbildgebung lässt sich unter anderem für die
Diagnostik der Schilddrüse und Nebenschilddrüsen klinisch sinnvoll einsetzen und erlaubt die
zweifelsfreie räumliche Korrelation metabolischer und morphologischer Informationen.
Allerdings beschränkt sich die praktische Anwendung aufgrund derzeit noch limitierender
Aspekte auf ausgewählte Fälle und wissenschaftliche Untersuchungen. Die Entwicklung eines
integrierten hybriden Detektors zur simultanen nuklearmedizinisch-sonografischen Bildgebung
wäre eine Möglichkeit, die bestehenden Limitationen zu überwinden.
Aesthetic Implications of Bilateral Profunda Artery Perforator Flaps on Thigh and Buttock Proportions
Authors: Henn Dominic , Lakatta Alexis , Teotia Sumeet S. , Haddock Nicholas T. 
Published: May 2023

Abstract
Background The profunda artery perforator (PAP) flap has emerged as an excellent secondary option for autologous breast reconstruction. Despite the increased acceptance, potential secondary benefits concerning aesthetic proportions of proximal thigh and buttock at the donor site have never been systematically investigated.
Methods A retrospective review of 151 patients who underwent breast reconstruction with horizontally designed PAP flaps (292 flaps) from 2012 to 2020 was performed. Patient characteristics, complications, and numbers of revision surgeries were collected. In bilateral reconstructions, pre- and postoperative standardized patient photographs were analyzed to identify postoperative changes in proximal thigh and buttock contour. The patients' own perception of postoperative aesthetic changes was determined by an electronic survey.
Results The patients had a mean age of 51 and a mean body mass index of 26.3 kg/m2. The most common complications were minor and major wound complications affecting 35.1% of patients, followed by cellulitis (12.6%), seroma (7.9%), and hematoma (4.0%). A total of 38 patients (25.2%) underwent revision of the donor site. After reconstruction, patients were found to have aesthetically improved proximal thigh and buttock proportions, indicated by a wider thigh gap (thigh gap-hip ratio: 0.05 ± 0.04 vs. 0.13 ± 0.05, p < 0.0001) and reduction in lateral thigh-to-buttock ratio (0.85 ± 0.05 vs. 0.76 ± 0.05, p < 0.0001). Among the 85 patients who responded to the survey (56.3% response rate), 70.6% felt that PAP surgery had aesthetically either improved their thigh contour (54.12%) or not changed it (16.47%), whereas only 29.4% reported that the surgery negatively impacted their thigh contour.
Conclusion PAP flap breast reconstruction leads to improved aesthetic proportions of the proximal thigh and buttock. This approach is ideal for patients with ptotic tissue of the inferior buttocks and medial thigh, a poorly defined infragluteal fold, and inadequate anterior-posterior buttock projection.